/* =========================================================================
   iLớp - bộ giao diện "Vở ô li"
   Tươi, tròn, thân thiện: nền kem kẻ ô li nhẹ, thẻ trắng viền mềm, màu san hô làm điểm nhấn,
   thẻ số liệu màu đậm, thanh tab tối dạng viên thuốc. Phông Nunito (lưu trong wwwroot/lib/nunito).
   Nền: bootstrap-reboot + grid + utilities. Mọi control tự dựng ở đây.
   Quy ước tên lớp: ui-<thành phần>, ui-<thành phần>--<biến thể>, is-<trạng thái>.
   ========================================================================= */

@font-face {
  font-family: "Nunito";
  font-style: normal;
  font-weight: 500 900;
  font-display: swap;
  src: url("../lib/nunito/nunito-vietnamese.woff2") format("woff2");
  unicode-range: U+0102-0103, U+0110-0111, U+0128-0129, U+0168-0169, U+01A0-01A1, U+01AF-01B0, U+0300-0301, U+0303-0304, U+0308-0309, U+0323, U+0329, U+1EA0-1EF9, U+20AB;
}

@font-face {
  font-family: "Nunito";
  font-style: normal;
  font-weight: 500 900;
  font-display: swap;
  src: url("../lib/nunito/nunito-latin-ext.woff2") format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C4, U+2113, U+2C60-2C7F, U+A720-A7FF;
}

@font-face {
  font-family: "Nunito";
  font-style: normal;
  font-weight: 500 900;
  font-display: swap;
  src: url("../lib/nunito/nunito-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  /* Màu nền, chữ (ấm, ngả nâu như giấy vở) */
  --c-bg: #fffaf4;
  --c-grid: rgba(222, 200, 176, 0.32);
  --c-surface: #ffffff;
  --c-surface-press: #fbf1e6;
  --c-text: #2a1f17;
  --c-text-2: #6b5a4d;
  --c-text-3: #7f6d5f;
  --c-line: #f0e4d6;
  --c-line-strong: #e2cfbb;
  --c-fill: #f6ebdf;

  /* Điểm nhấn: san hô (chữ, nút dùng tông đậm để đủ tương phản; mảng màu dùng tông tươi) */
  --c-primary: #cf3e1c;
  --c-primary-press: #b0330f;
  --c-primary-soft: #ffe9e1;
  --c-on-primary: #ffffff;
  --c-coral: #f25a38;

  /* Màu phụ cho thẻ số liệu, avatar */
  --c-teal: #0b8a79;
  --c-teal-soft: #ddf3ef;
  --c-sun: #ffc94d;
  --c-sun-ink: #4a3500;
  --c-sun-soft: #fff3cf;
  --c-violet: #6b5ce7;
  --c-violet-soft: #ebe8ff;
  --c-sticker-muted: #b9a593;
  --c-sky: #2f7fd8;
  --c-pink: #d6457f;

  /* Trạng thái */
  --c-danger: #c42b2b;
  --c-danger-press: #a32020;
  --c-danger-soft: #fde8e6;
  --c-success: #0b7a5f;
  --c-success-soft: #dcf2ea;
  --c-warning: #8f5a00;
  --c-warning-soft: #fff1d1;
  --c-info: #6b5ce7;
  --c-info-soft: #efedff;

  --c-ink: #2a1f17;
  --c-on-ink: #f6ece2;
  --c-on-ink-2: #b7a99c;
  --c-backdrop: rgba(42, 31, 23, 0.45);

  /* Chữ */
  --font: "Nunito", ui-rounded, "SF Pro Rounded", -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --fs-xs: 0.75rem;   /* 12 */
  --fs-sm: 0.8125rem; /* 13 */
  --fs-md: 0.9375rem; /* 15 */
  --fs-base: 1rem;    /* 16 */
  --fs-lg: 1.0625rem; /* 17 */
  --fs-xl: 1.25rem;   /* 20 */
  --fs-2xl: 1.75rem;  /* 28 */
  --fs-3xl: 2rem;     /* 32 */

  /* Khoảng cách, bo góc, kích thước */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 20px;
  --sp-6: 24px;
  --sp-8: 32px;
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 22px;
  --r-xl: 28px;
  --r-pill: 999px;

  --h-control: 52px;
  --h-touch: 44px;
  --h-appbar: 56px;
  --h-tabbar: 66px;
  --tabbar-gap: 14px;
  --h-actionbar: 80px;
  --w-frame: 600px;
  --w-rail: 92px;

  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);

  --ring: 0 0 0 2px var(--c-line);
  --shadow-1: 0 2px 6px rgba(124, 92, 64, 0.12);
  --shadow-2: 0 14px 30px -14px rgba(42, 31, 23, 0.45);
  --shadow-tile: 0 12px 22px -14px rgba(42, 31, 23, 0.5);
  --shadow-sticker: 0 6px 12px -6px rgba(42, 31, 23, 0.45);
  --ease: cubic-bezier(0.2, 0.8, 0.2, 1);
  --spring: cubic-bezier(0.34, 1.4, 0.64, 1);
  --dur: 220ms;
}

/* ---------- Nền tảng ---------- */

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

/* Chữ lớn (tab Cá nhân): mọi cỡ chữ dùng rem nên chỉ cần tăng cỡ gốc. */
html.is-large-text {
  font-size: 115%;
}

html.is-sheet-open {
  overflow: hidden;
}

/* Đang mở sheet: tắt hiệu ứng vào trang (transform của phần tử cha sẽ giam sheet position: fixed). */
html.is-sheet-open .app-content > * {
  animation: none;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-base);
  font-weight: 600;
  line-height: 1.45;
  color: var(--c-text);
  background-color: var(--c-bg);
  /* Kẻ ô li nhẹ như trang vở */
  background-image:
    linear-gradient(var(--c-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
  background-size: 24px 24px;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior-y: none;
  overflow-x: hidden;
}

a {
  color: var(--c-primary);
  text-decoration: none;
}

b,
strong {
  font-weight: 800;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--c-primary) 50%, transparent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.ui-icon {
  width: 24px;
  height: 24px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ui-icon--sm { width: 18px; height: 18px; }
.ui-icon--lg { width: 34px; height: 34px; }

/* ---------- Khung app ---------- */

.app-frame {
  position: relative;
  max-width: var(--w-frame);
  min-height: 100vh;
  min-height: 100dvh;
  margin: 0 auto;
}

.app-content {
  padding: var(--sp-1) 0 calc(var(--sp-8) + var(--safe-bottom));
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
}

.has-tabbar .app-content {
  padding-bottom: calc(var(--h-tabbar) + var(--tabbar-gap) * 2 + var(--safe-bottom) + var(--sp-4));
}

.has-actionbar .app-content {
  padding-bottom: calc(var(--h-actionbar) + var(--safe-bottom) + var(--sp-6));
}

.has-tabbar.has-actionbar .app-content {
  padding-bottom: calc(var(--h-tabbar) + var(--tabbar-gap) * 2 + var(--h-actionbar) + var(--safe-bottom) + var(--sp-4));
}

/* App bar: thanh mảnh phía trên; trang chính có tiêu đề lớn bên dưới, tiêu đề nhỏ chỉ hiện khi đã cuộn */
.ui-appbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: var(--sp-1);
  min-height: calc(var(--h-appbar) + var(--safe-top));
  padding: var(--safe-top) calc(var(--sp-2) + var(--safe-right)) 0 calc(var(--sp-2) + var(--safe-left));
  background: color-mix(in srgb, var(--c-bg) 86%, transparent);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 2px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.ui-appbar.is-scrolled {
  border-bottom-color: var(--c-line);
}

.ui-appbar-title {
  flex: 1;
  min-width: 0;
  margin: 0;
  padding: 0 var(--sp-2);
  font-size: var(--fs-lg);
  font-weight: 900;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.ui-appbar-back + .ui-appbar-title {
  padding-left: var(--sp-3);
}

.has-largetitle .ui-appbar:not(.is-scrolled) .ui-appbar-title {
  opacity: 0;
  transform: translateY(6px);
}

.ui-appbar-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-1);
}

/* Tiêu đề lớn của trang chính */
.ui-largetitle {
  padding: 0 calc(var(--sp-5) + var(--safe-right)) var(--sp-4) calc(var(--sp-5) + var(--safe-left));
}

.ui-largetitle-eyebrow {
  margin: 0 0 2px;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 800;
}

.ui-largetitle-text {
  margin: 0;
  font-size: var(--fs-3xl);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}

.ui-largetitle-text em {
  font-style: normal;
  color: var(--c-coral);
}

.ui-iconbtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--h-touch);
  height: var(--h-touch);
  padding: 0;
  border: 0;
  border-radius: var(--r-md);
  background: transparent;
  color: var(--c-text);
  cursor: pointer;
  transition: background-color 120ms, transform 120ms var(--ease);
}

.ui-iconbtn:active {
  background: var(--c-fill);
  transform: scale(0.94);
}

.ui-appbar-back {
  color: var(--c-text);
  background: var(--c-surface);
  box-shadow: var(--ring);
}

/* Chip ngữ cảnh trên app bar (vd: chọn lớp) */
.ui-context {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  min-height: 38px;
  padding: 0 var(--sp-2) 0 var(--sp-3);
  border: 0;
  border-radius: var(--r-md);
  background: var(--c-surface);
  box-shadow: var(--ring);
  color: var(--c-text);
  font-size: var(--fs-md);
  font-weight: 800;
  cursor: pointer;
}

.ui-context::before {
  content: "";
  position: absolute;
  inset: -3px 0;
}

.ui-context:active {
  background: var(--c-fill);
}

/* Thanh tab: viên thuốc tối nổi phía dưới; tab đang chọn hiện cả chữ */
.ui-tabbar {
  position: fixed;
  z-index: 40;
  left: 50%;
  bottom: calc(var(--tabbar-gap) + var(--safe-bottom));
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--sp-4));
  max-width: calc(var(--w-frame) - 2 * var(--sp-4));
  height: var(--h-tabbar);
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--sp-1);
  padding: 0 var(--sp-2);
  border-radius: 26px;
  background: var(--c-ink);
  box-shadow: 0 16px 30px -12px rgba(42, 31, 23, 0.55);
}

.ui-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-width: 52px;
  height: 50px;
  padding: 0 var(--sp-3);
  border-radius: 18px;
  color: var(--c-on-ink-2);
  font-size: var(--fs-md);
  font-weight: 800;
  white-space: nowrap;
  transition: background-color 200ms var(--ease), color 200ms var(--ease);
}

.ui-tab:active {
  background: rgba(255, 255, 255, 0.08);
}

.ui-tab .ui-icon {
  transition: transform 220ms var(--spring);
}

.ui-tab:active .ui-icon {
  transform: scale(0.86);
}

.ui-tab.is-active {
  background: var(--c-coral);
  color: #fff;
  padding: 0 var(--sp-4) 0 var(--sp-3);
}

/* Tab không chọn chỉ hiện biểu tượng; chữ vẫn có cho trình đọc màn hình. */
.ui-tab:not(.is-active) .ui-tab-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.ui-tab-badge {
  position: absolute;
  top: 6px;
  right: 8px;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  border-radius: var(--r-pill);
  background: var(--c-sun);
  color: var(--c-sun-ink);
  font-size: 11px;
  font-weight: 900;
  line-height: 18px;
  text-align: center;
}

/* Thanh hành động cố định dưới đáy */
.ui-actionbar {
  position: fixed;
  z-index: 35;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--w-frame);
  display: flex;
  gap: var(--sp-3);
  padding: var(--sp-3) calc(var(--sp-4) + var(--safe-right)) calc(var(--sp-3) + var(--safe-bottom)) calc(var(--sp-4) + var(--safe-left));
  background: color-mix(in srgb, var(--c-bg) 92%, transparent);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-top: 2px solid var(--c-line);
}

.ui-actionbar > * {
  flex: 1;
}

/* Thanh hành động không có nút nào thì ẩn (app.js cũng gỡ lớp has-actionbar khỏi body). */
.ui-actionbar:not(:has(*)) {
  display: none;
}

.has-tabbar .ui-actionbar {
  bottom: calc(var(--h-tabbar) + var(--tabbar-gap) * 2 + var(--safe-bottom) - var(--sp-3));
  border-top: 0;
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

/* Màn hình lớn: thanh tab thành thanh dọc bên trái khung nội dung */
@media (min-width: 992px) {
  .ui-tabbar {
    top: 50%;
    bottom: auto;
    left: calc(50% - var(--w-frame) / 2 - var(--w-rail) - var(--sp-4));
    transform: translateY(-50%);
    width: var(--w-rail);
    height: auto;
    flex-direction: column;
    gap: var(--sp-2);
    padding: var(--sp-3) var(--sp-2);
  }

  .ui-tab,
  .ui-tab.is-active {
    flex-direction: column;
    gap: 2px;
    width: 100%;
    height: 64px;
    padding: 0;
    font-size: var(--fs-xs);
  }

  .ui-tab:not(.is-active) .ui-tab-label {
    position: static;
    width: auto;
    height: auto;
    clip: auto;
  }

  .has-tabbar .app-content {
    padding-bottom: var(--sp-8);
  }

  .has-tabbar .ui-actionbar {
    bottom: 0;
    border-top: 2px solid var(--c-line);
    background: color-mix(in srgb, var(--c-bg) 92%, transparent);
  }

  .has-tabbar.has-actionbar .app-content {
    padding-bottom: calc(var(--h-actionbar) + var(--sp-6));
  }
}

/* ---------- Bố cục nội dung ---------- */

.ui-section {
  margin: var(--sp-5) 0;
}

.ui-section:first-child {
  margin-top: var(--sp-2);
}

.ui-section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--sp-3);
  margin: 0 var(--sp-4) var(--sp-2);
  padding: 0 var(--sp-1);
}

/* Dòng giải thích ngay dưới tiêu đề mục, thẳng lề với tiêu đề */
.ui-section-hint {
  margin: calc(-1 * var(--sp-1)) var(--sp-4) var(--sp-2);
  padding: 0 var(--sp-1);
  color: var(--c-text-2);
  font-size: var(--fs-md);
  line-height: 1.45;
}

.ui-section-title {
  margin: 0;
  font-size: var(--fs-lg);
  font-weight: 900;
  color: var(--c-text);
  letter-spacing: -0.01em;
}

.ui-section-head a {
  font-weight: 800;
}

.ui-section-body {
  margin: 0 var(--sp-4);
}

/* Thành phần nằm trong section đã có lề của section, không cộng thêm lề riêng.
   (:not(...) giữ độ ưu tiên cao hơn lề riêng của .ui-list, .ui-card…) */
.ui-section-body > :not(.ui-chips--scroll),
.ui-section-body > form > .ui-card,
.ui-section-body > form > .ui-list,
.ui-section-body > .ui-stack > .ui-card,
.ui-section-body > .ui-stack > .ui-list,
.ui-section-body > .ui-stack > form > .ui-card,
.ui-section-body > .ui-stack > .ui-tiles {
  margin-left: 0;
  margin-right: 0;
}

.ui-stack > * + * {
  margin-top: var(--sp-3);
}

.ui-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
}

.ui-row > * {
  flex: 1 1 140px;
}

.ui-text-2 { color: var(--c-text-2); }
.ui-text-3 { color: var(--c-text-3); }
.ui-small { font-size: var(--fs-md); }

.ui-card {
  margin: 0 var(--sp-4);
  padding: var(--sp-4);
  background: var(--c-surface);
  border-radius: var(--r-lg);
  box-shadow: var(--ring);
}

.ui-card-title {
  margin: 0 0 var(--sp-2);
  font-size: var(--fs-lg);
  font-weight: 900;
}

/* Ghi chú nội tuyến (không phải popup) */
.ui-note {
  display: flex;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  background: var(--c-info-soft);
  color: var(--c-text);
  font-size: var(--fs-md);
}

.ui-note > .ui-icon { color: var(--c-info); margin-top: 1px; }
.ui-note--warning { background: var(--c-warning-soft); }
.ui-note--warning > .ui-icon { color: var(--c-warning); }
.ui-note--danger { background: var(--c-danger-soft); }
.ui-note--danger > .ui-icon { color: var(--c-danger); }
.ui-note--success { background: var(--c-success-soft); }
.ui-note--success > .ui-icon { color: var(--c-success); }

.ui-form-errors {
  margin: 0 var(--sp-4) var(--sp-4);
}

/* Thẻ hiển thị mật khẩu mới (chỉ hiện một lần): như tờ phiếu cắt rời */
.ui-credential {
  margin: 0 var(--sp-4);
  padding: var(--sp-4) var(--sp-5);
  border: 2px dashed var(--c-coral);
  border-radius: var(--r-lg);
  background: var(--c-surface);
}

.ui-credential dt {
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 800;
}

.ui-credential dd {
  margin: 2px 0 var(--sp-3);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: var(--fs-xl);
  font-weight: 700;
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}

.ui-credential dd:last-child {
  margin-bottom: 0;
}

/* ---------- Thẻ số liệu (ô màu trên trang chủ) ---------- */

.ui-tiles {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--sp-3);
  margin: 0 var(--sp-4);
}

.ui-tile {
  --tile-bg: var(--c-coral);
  --tile-ink: #ffffff;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--sp-3);
  min-height: 124px;
  padding: var(--sp-4);
  border-radius: 26px;
  background: var(--tile-bg);
  color: var(--tile-ink);
  box-shadow: var(--shadow-tile);
  overflow: hidden;
  transition: transform 160ms var(--spring);
}

/* Vòng trang trí mờ ở góc thẻ */
.ui-tile::after {
  content: "";
  position: absolute;
  right: -26px;
  top: -26px;
  width: 86px;
  height: 86px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
  pointer-events: none;
}

a.ui-tile:active {
  transform: scale(0.97);
}

.ui-tile--teal { --tile-bg: var(--c-teal); }
.ui-tile--sun { --tile-bg: var(--c-sun); --tile-ink: var(--c-sun-ink); }
.ui-tile--violet { --tile-bg: var(--c-violet); }
.ui-tile--ink { --tile-bg: var(--c-ink); --tile-ink: var(--c-on-ink); }

.ui-tile-value {
  display: block;
  font-size: var(--fs-2xl);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.ui-tile-label {
  display: block;
  margin-top: 4px;
  font-size: var(--fs-md);
  font-weight: 800;
}

.ui-tile-hint {
  display: block;
  font-size: var(--fs-sm);
  font-weight: 700;
  opacity: 0.85;
}

/* Thẻ "tuần hiện tại" trên trang chủ */
.ui-weekcard {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin: 0 var(--sp-4);
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-lg);
  background: var(--c-surface);
  box-shadow: var(--ring);
  color: var(--c-text);
  transition: transform 160ms var(--spring);
}

a.ui-weekcard:active {
  transform: scale(0.98);
}

.ui-weekcard-num {
  flex: none;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  border-radius: 18px;
  background: var(--c-ink);
  color: var(--c-on-ink);
  text-align: center;
  line-height: 1;
}

.ui-weekcard-num small {
  display: block;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.8;
}

.ui-weekcard-num b {
  display: block;
  font-size: 24px;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
}

.ui-weekcard-text b {
  display: block;
  font-size: var(--fs-base);
  font-weight: 900;
}

.ui-weekcard-text span {
  display: block;
  color: var(--c-text-2);
  font-size: var(--fs-md);
}

/* ---------- Nút ---------- */

.ui-btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-2);
  min-height: var(--h-control);
  padding: 0 var(--sp-5);
  border: 0;
  border-radius: 18px;
  background: var(--c-primary);
  color: var(--c-on-primary);
  font-size: var(--fs-base);
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
  cursor: pointer;
  user-select: none;
  box-shadow: 0 8px 16px -10px color-mix(in srgb, var(--c-primary) 80%, transparent);
  transition: transform 140ms var(--spring), background-color 120ms, opacity 120ms;
}

.ui-btn:active {
  transform: scale(0.97);
  background: var(--c-primary-press);
}

.ui-btn--block {
  display: flex;
  width: 100%;
}

.ui-btn--secondary {
  background: var(--c-primary-soft);
  color: var(--c-primary);
  box-shadow: none;
}

.ui-btn--secondary:active {
  background: color-mix(in srgb, var(--c-primary-soft) 80%, var(--c-primary) 20%);
}

.ui-btn--neutral {
  background: var(--c-surface);
  color: var(--c-text);
  box-shadow: inset 0 0 0 2px var(--c-line-strong);
}

.ui-btn--neutral:active {
  background: var(--c-fill);
}

.ui-btn--danger {
  background: var(--c-danger);
  box-shadow: 0 8px 16px -10px color-mix(in srgb, var(--c-danger) 80%, transparent);
}

.ui-btn--danger:active {
  background: var(--c-danger-press);
}

.ui-btn--danger-soft {
  background: var(--c-danger-soft);
  color: var(--c-danger);
  box-shadow: none;
}

.ui-btn--danger-soft:active {
  background: color-mix(in srgb, var(--c-danger-soft) 78%, var(--c-danger) 22%);
}

.ui-btn--ghost {
  background: transparent;
  color: var(--c-primary);
  box-shadow: none;
}

.ui-btn--ghost:active {
  background: var(--c-primary-soft);
}

.ui-btn--sm {
  min-height: var(--h-touch);
  padding: 0 var(--sp-4);
  border-radius: var(--r-md);
  font-size: var(--fs-md);
}

.ui-btn[disabled],
.ui-btn.is-disabled {
  opacity: 0.45;
  pointer-events: none;
}

.ui-btn-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 3px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: ui-spin 700ms linear infinite;
}

.ui-btn.is-loading {
  pointer-events: none;
}

.ui-btn.is-loading .ui-btn-spinner {
  display: inline-block;
}

.ui-btn.is-loading > .ui-icon {
  display: none;
}

@keyframes ui-spin {
  to { transform: rotate(360deg); }
}

/* Nút nổi (FAB) */
.ui-fab {
  position: fixed;
  z-index: 34;
  right: max(calc(50% - var(--w-frame) / 2 + var(--sp-4)), calc(var(--sp-4) + var(--safe-right)));
  bottom: calc(var(--sp-4) + var(--safe-bottom));
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  min-height: 56px;
  padding: 0 var(--sp-5) 0 var(--sp-4);
  border: 0;
  border-radius: 20px;
  background: var(--c-primary);
  color: var(--c-on-primary);
  font-weight: 900;
  box-shadow: 0 14px 26px -12px color-mix(in srgb, var(--c-primary) 90%, transparent);
  transition: transform 160ms var(--spring);
}

.ui-fab:active {
  transform: scale(0.95);
  background: var(--c-primary-press);
}

.has-tabbar .ui-fab {
  bottom: calc(var(--h-tabbar) + var(--tabbar-gap) * 2 + var(--safe-bottom));
}

@media (min-width: 992px) {
  .has-tabbar .ui-fab {
    bottom: var(--sp-6);
  }
}

/* ---------- Huy hiệu và chip ---------- */

.ui-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  background: var(--c-fill);
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 800;
  line-height: 1.4;
  white-space: nowrap;
}

.ui-badge--primary { background: var(--c-primary-soft); color: var(--c-primary); }
.ui-badge--success { background: var(--c-success-soft); color: var(--c-success); }
.ui-badge--warning { background: var(--c-warning-soft); color: var(--c-warning); }
.ui-badge--danger { background: var(--c-danger-soft); color: var(--c-danger); }

.ui-chips-group {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.ui-chips {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin: 0;
  padding: 0;
  border: 0;
}

/* Hàng chip lọc (bộ lọc, cột điểm, ngày, tổ): KHÔNG cuộn ngang. Cuộn ngang ẩn mất các chip phía sau
   (người dùng không biết còn mục, chip ở mép bị cắt khó chạm), nên chip tự xuống dòng để luôn thấy và chạm được đủ.
   Mỗi chip giữ chữ trên một dòng (nhãn ngắn), chip nhỏ gọn hơn chip tiêu chí để 2-3 dòng vẫn gọn. */
.ui-chips--scroll {
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.ui-chips--scroll .ui-chip-face {
  padding: 0 var(--sp-3);
}

.ui-chip {
  position: relative;
  display: inline-flex;
  flex: none;
  cursor: pointer;
}

.ui-chip input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.ui-chip-face {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 var(--sp-4);
  border-radius: var(--r-md);
  background: var(--c-surface);
  box-shadow: inset 0 0 0 2px var(--c-line-strong);
  color: var(--c-text);
  font-size: var(--fs-md);
  font-weight: 800;
  white-space: nowrap;
  transition: background-color 140ms, box-shadow 140ms, transform 140ms var(--spring);
}

/* Chip tiêu chí (tên dài): chữ trong chip được xuống dòng, chip không rộng quá hàng.
   Chip lọc (.ui-chips--scroll) giữ chữ một dòng; cả hàng vẫn xuống dòng (xem trên). */
.ui-chips:not(.ui-chips--scroll) .ui-chip {
  flex: 0 1 auto;
  max-width: 100%;
}

.ui-chips:not(.ui-chips--scroll) .ui-chip-face {
  padding-block: 8px;
  white-space: normal;
  line-height: 1.3;
}

.ui-chip-count {
  flex: none;
}

/* Mở rộng vùng chạm lên 44px mà vẫn giữ chip gọn */
.ui-chip::before {
  content: "";
  position: absolute;
  inset: -2px -2px;
}

.ui-chip:active .ui-chip-face {
  transform: scale(0.95);
}

.ui-chip-face .ui-icon {
  display: none;
  width: 16px;
  height: 16px;
  stroke-width: 3;
}

.ui-chip input:checked + .ui-chip-face {
  background: var(--c-ink);
  box-shadow: none;
  color: var(--c-on-ink);
}

.ui-chip input:checked + .ui-chip-face .ui-icon {
  display: inline-block;
}

.ui-chip input:focus-visible + .ui-chip-face {
  outline: 3px solid color-mix(in srgb, var(--c-primary) 50%, transparent);
  outline-offset: 2px;
}

.ui-chip-count {
  min-width: 22px;
  padding: 0 6px;
  border-radius: 8px;
  background: var(--c-fill);
  color: var(--c-text-2);
  font-size: var(--fs-xs);
  font-weight: 900;
  line-height: 22px;
  text-align: center;
}

.ui-chip input:checked + .ui-chip-face .ui-chip-count {
  background: var(--c-coral);
  color: #fff;
}

/* ---------- Segmented control ---------- */

.ui-segmented {
  display: flex;
  margin: 0;
  padding: 4px;
  border: 0;
  border-radius: 18px;
  background: var(--c-fill);
}

.ui-segment {
  position: relative;
  flex: 1;
  min-width: 0;
  cursor: pointer;
}

.ui-segment input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.ui-segment span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 var(--sp-2);
  border-radius: 14px;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 900;
  text-align: center;
  transition: background-color 180ms var(--ease), color 180ms, box-shadow 180ms;
}

.ui-segment input:checked + span {
  background: var(--c-surface);
  color: var(--c-text);
  box-shadow: var(--shadow-1);
}

.ui-segment input:focus-visible + span {
  outline: 3px solid color-mix(in srgb, var(--c-primary) 50%, transparent);
}

/* ---------- Danh sách ---------- */

.ui-list {
  margin: 0 var(--sp-4);
  padding: 0;
  list-style: none;
  background: var(--c-surface);
  border-radius: var(--r-lg);
  box-shadow: var(--ring);
  overflow: hidden;
}

.ui-list--flush {
  margin: 0;
  border-radius: 0;
  box-shadow: none;
}

.ui-list > [role="listitem"] + [role="listitem"] > .ui-list-item::before,
.ui-list > [role="listitem"] + [role="listitem"] > .ui-switch-row::before {
  content: "";
  position: absolute;
  top: 0;
  right: var(--sp-4);
  left: var(--ui-list-inset, var(--sp-4));
  border-top: 2px dotted var(--c-line);
}

.ui-list-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  min-height: 64px;
  padding: var(--sp-3) var(--sp-4);
  border: 0;
  background: transparent;
  color: var(--c-text);
  text-align: left;
  transition: background-color 100ms;
}

.ui-list-item.has-leading {
  --ui-list-inset: 70px;
}

a.ui-list-item,
button.ui-list-item,
label.ui-list-item {
  cursor: pointer;
}

a.ui-list-item:active,
button.ui-list-item:active,
label.ui-list-item:active {
  background: var(--c-surface-press);
}

/* Biểu tượng đầu dòng kiểu "nhãn dán" (người dùng chọn 13/10/2026): ô màu đậm viền trắng, đổ bóng,
   nghiêng xen kẽ giữa các dòng như sticker dán vào vở. */
.ui-list-leading {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 44px;
  height: 44px;
  border: 3px solid #fff;
  border-radius: 15px;
  background: var(--c-coral);
  color: #fff;
  font-size: var(--fs-base);
  font-weight: 900;
  box-shadow: var(--shadow-sticker);
  transform: rotate(-4deg);
}

.ui-list-item:nth-child(even) .ui-list-leading {
  transform: rotate(3deg);
}

.ui-list-leading .ui-icon {
  stroke-width: 2.5;
}

.ui-list-leading--square {
  border-radius: var(--r-sm);
}

.ui-list-leading--muted { background: var(--c-sticker-muted); color: #fff; }
.ui-list-leading--success { background: var(--c-teal); color: #fff; }
.ui-list-leading--warning { background: var(--c-sun); color: var(--c-sun-ink); }
.ui-list-leading--danger { background: var(--c-danger); color: #fff; }

/* Avatar chữ cái đầu: màu cố định theo tên (6 màu) */
.ui-avatar--0 { background: var(--c-coral); color: #fff; }
.ui-avatar--1 { background: var(--c-teal); color: #fff; }
.ui-avatar--2 { background: var(--c-violet); color: #fff; }
.ui-avatar--3 { background: var(--c-sun); color: var(--c-sun-ink); }
.ui-avatar--4 { background: var(--c-sky); color: #fff; }
.ui-avatar--5 { background: var(--c-pink); color: #fff; }

.ui-list-body {
  flex: 1;
  min-width: 0;
}

.ui-list-title {
  display: block;
  font-size: var(--fs-base);
  font-weight: 800;
  line-height: 1.3;
  overflow-wrap: anywhere;
}

.ui-list-subtitle {
  display: block;
  margin-top: 2px;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 600;
  line-height: 1.35;
  overflow-wrap: break-word;
}

.ui-list-trailing {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  flex: none;
  max-width: 48%;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

/* Huy hiệu nằm dưới tên, không chiếm chỗ bên phải */
.ui-list-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.ui-list-chevron {
  color: var(--c-line-strong);
  margin-right: -6px;
  stroke-width: 2.6;
}

.ui-list-item--danger .ui-list-title {
  color: var(--c-danger);
}

/* Điểm cộng (biểu dương): số điểm bên phải màu xanh, vẫn có dấu "+" nên không chỉ dựa vào màu */
.ui-list-item--success .ui-list-trailing > span {
  color: var(--c-success);
  font-weight: 900;
}

/* ---------- Ô nhập ---------- */

.ui-field {
  margin: 0 0 var(--sp-5);
}

.ui-field:last-child {
  margin-bottom: 0;
}

.ui-field-label {
  display: block;
  margin: 0 0 6px;
  padding: 0 2px;
  color: var(--c-text);
  font-size: var(--fs-md);
  font-weight: 800;
}

legend.ui-field-label {
  float: none;
  width: auto;
  font-size: var(--fs-md);
  line-height: inherit;
}

fieldset.ui-field {
  min-width: 0;
  padding: 0;
  border: 0;
}

.ui-optional {
  color: var(--c-text-3);
  font-weight: 600;
}

.ui-input,
.ui-picker-trigger {
  display: block;
  width: 100%;
  min-height: var(--h-control);
  padding: 12px 16px;
  border: 2px solid var(--c-line-strong);
  border-radius: var(--r-md);
  background: var(--c-surface);
  color: var(--c-text);
  font-size: max(16px, var(--fs-base)); /* >= 16px để iPhone không tự phóng to */
  font-weight: 700;
  line-height: 1.4;
  appearance: none;
  transition: border-color 120ms, box-shadow 120ms;
}

.ui-input::placeholder {
  color: var(--c-text-3);
  font-weight: 600;
  opacity: 1;
}

.ui-input:focus,
.ui-picker-trigger:focus-visible {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--c-primary) 16%, transparent);
}

textarea.ui-input {
  min-height: 112px;
  resize: vertical;
}

input[type="date"].ui-input {
  min-height: var(--h-control);
  -webkit-appearance: none;
}

.ui-input[readonly],
.ui-input[disabled] {
  background: var(--c-fill);
  color: var(--c-text-2);
}

.ui-input-wrap {
  position: relative;
}

.ui-input-wrap > .ui-icon {
  position: absolute;
  top: 50%;
  left: 16px;
  transform: translateY(-50%);
  color: var(--c-text-3);
  pointer-events: none;
}

.ui-input-wrap > .ui-input {
  padding-left: 48px;
}

.ui-field-hint,
.ui-field-error {
  display: block;
  margin-top: 6px;
  padding: 0 2px;
  font-size: var(--fs-sm);
  line-height: 1.4;
}

.ui-field-hint {
  color: var(--c-text-3);
  font-weight: 600;
}

.ui-field-error {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  color: var(--c-danger);
  font-weight: 800;
}

.ui-field-error:empty {
  display: none;
}

.ui-field-error::before {
  content: "";
  flex: none;
  width: 16px;
  height: 16px;
  margin-top: 1px;
  background: currentColor;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.6' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 7v6M12 17h.01'/%3E%3C/svg%3E") center / contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='2.6' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='10'/%3E%3Cpath d='M12 7v6M12 17h.01'/%3E%3C/svg%3E") center / contain no-repeat;
}

.ui-field.has-error .ui-input,
.ui-field.has-error .ui-picker-trigger {
  border-color: var(--c-danger);
  background: color-mix(in srgb, var(--c-danger-soft) 40%, var(--c-surface));
}

.ui-field.has-error .ui-field-hint {
  display: none;
}

/* Bộ chọn (thay cho <select>) */
.ui-picker-trigger {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  text-align: left;
  cursor: pointer;
}

.ui-picker-trigger:active {
  background: var(--c-surface-press);
}

.ui-picker-value {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ui-picker-value.is-placeholder {
  color: var(--c-text-3);
  font-weight: 600;
}

.ui-picker-trigger > .ui-icon {
  color: var(--c-text-2);
}

/* Chọn file */
.ui-file {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-height: 76px;
  padding: var(--sp-3) var(--sp-4);
  border: 2px dashed var(--c-line-strong);
  border-radius: var(--r-lg);
  background: var(--c-surface);
  color: var(--c-text-2);
  cursor: pointer;
}

.ui-file:active {
  background: var(--c-surface-press);
}

.ui-file:focus-within {
  border-color: var(--c-primary);
}

.ui-file.has-file {
  border-style: solid;
  border-color: var(--c-teal);
  color: var(--c-text);
}

.ui-file-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.ui-file-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 46px;
  height: 46px;
  border: 3px solid #fff;
  border-radius: 15px;
  background: var(--c-teal);
  color: #fff;
  box-shadow: var(--shadow-sticker);
  transform: rotate(-4deg);
}

.ui-file-text {
  flex: 1;
  min-width: 0;
  font-weight: 800;
  overflow-wrap: anywhere;
}

.ui-field.has-error .ui-file {
  border-color: var(--c-danger);
}

/* Công tắc (switch) */
.ui-switch-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-height: 64px;
  padding: var(--sp-3) var(--sp-4);
  background: var(--c-surface);
  border-radius: var(--r-lg);
  box-shadow: var(--ring);
  cursor: pointer;
}

.ui-list .ui-switch-row {
  border-radius: 0;
  box-shadow: none;
}

.ui-switch-text {
  flex: 1;
  min-width: 0;
}

.ui-switch-text > span {
  display: block;
  font-weight: 800;
}

.ui-switch-text > small {
  display: block;
  margin-top: 2px;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 600;
}

.ui-switch {
  position: relative;
  flex: none;
  width: 54px;
  height: 32px;
  margin: 0;
  border-radius: var(--r-pill);
  background: var(--c-line-strong);
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: background-color 180ms var(--ease);
}

.ui-switch::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 4px rgba(42, 31, 23, 0.25);
  transition: transform 220ms var(--spring);
}

.ui-switch:checked {
  background: var(--c-teal);
}

.ui-switch:checked::after {
  transform: translateX(22px);
}

.ui-switch[disabled] {
  opacity: 0.45;
}

/* ---------- Bottom sheet / action sheet ---------- */

dialog.ui-sheet {
  position: fixed;
  z-index: 50;
  /* --vv-bottom/--vv-h do app.js đo từ visualViewport (phần bị thanh công cụ, bàn phím che). */
  inset: auto 0 var(--vv-bottom, 0px) 0;
  width: 100%;
  height: auto;
  min-height: 0;
  max-width: var(--w-frame);
  max-height: 88vh;
  max-height: min(88dvh, calc(var(--vv-h, 100dvh) - 24px));
  margin: 0 auto;
  padding: 0 0 var(--safe-bottom);
  border: 0;
  border-radius: var(--r-xl) var(--r-xl) 0 0;
  background: var(--c-bg);
  color: var(--c-text);
  box-shadow: var(--shadow-2);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(100%);
  transition: transform 300ms var(--ease);
}

dialog.ui-sheet:not([open]) {
  display: none;
}

dialog.ui-sheet:focus {
  outline: none;
}

dialog.ui-sheet.is-open {
  transform: translateY(0);
}

dialog.ui-sheet.is-dragging {
  transition: none;
}

/* Lớp nền tối do app.js tạo (sheet không dùng top layer/::backdrop, xem openSheet). */
.ui-sheet-backdrop {
  position: fixed;
  inset: 0;
  z-index: 49;
  background: var(--c-backdrop);
  opacity: 0;
  visibility: hidden;
  touch-action: none;
  transition: opacity 240ms, visibility 0s linear 240ms;
}

.ui-sheet-backdrop.is-open {
  opacity: 1;
  visibility: visible;
  transition: opacity 240ms;
}

.ui-sheet-grip {
  flex: none;
  padding: 10px 0 var(--sp-1);
  touch-action: none;
  cursor: grab;
}

.ui-sheet-grip::before {
  content: "";
  display: block;
  width: 44px;
  height: 5px;
  margin: 0 auto;
  border-radius: var(--r-pill);
  background: var(--c-line-strong);
}

.ui-sheet-head {
  flex: none;
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  padding: var(--sp-1) var(--sp-3) var(--sp-3) var(--sp-5);
  touch-action: none;
}

.ui-sheet-title {
  flex: 1;
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 900;
  letter-spacing: -0.01em;
}

.ui-sheet-head .ui-iconbtn {
  background: var(--c-surface);
  box-shadow: var(--ring);
}

.ui-sheet-search {
  flex: none;
  padding: 0 var(--sp-4) var(--sp-3);
}

.ui-sheet-body {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0 0 var(--sp-4);
}

.ui-sheet-body--padded {
  padding: 0 var(--sp-5) var(--sp-5);
}

.ui-sheet-message {
  margin: 0;
  padding: 0 var(--sp-5) var(--sp-4);
  color: var(--c-text-2);
}

.ui-sheet-actions {
  flex: none;
  display: grid;
  gap: var(--sp-2);
  padding: 0 var(--sp-4) var(--sp-4);
}

/* Hàng lựa chọn trong sheet */
.ui-options {
  margin: 0 var(--sp-4);
  padding: 0;
  border-radius: var(--r-lg);
  background: var(--c-surface);
  box-shadow: var(--ring);
  overflow: hidden;
}

.ui-option {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: 100%;
  min-height: 58px;
  padding: var(--sp-2) var(--sp-4);
  border: 0;
  background: transparent;
  color: var(--c-text);
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.ui-option + .ui-option::before {
  content: "";
  position: absolute;
  top: 0;
  left: var(--sp-4);
  right: var(--sp-4);
  border-top: 2px dotted var(--c-line);
}

.ui-option:active {
  background: var(--c-surface-press);
}

.ui-option-text {
  flex: 1;
  min-width: 0;
}

.ui-option-text small {
  display: block;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 600;
}

.ui-option-check {
  flex: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 11px;
  border: 2px solid var(--c-line-strong);
  color: transparent;
  transition: background-color 150ms, border-color 150ms, transform 200ms var(--spring);
}

.ui-option-check .ui-icon {
  width: 18px;
  height: 18px;
  stroke-width: 3.2;
}

.ui-option[aria-selected="true"] .ui-option-check,
.ui-option[aria-checked="true"] .ui-option-check {
  border-color: var(--c-coral);
  background: var(--c-coral);
  color: #fff;
  transform: scale(1.06);
}

.ui-option[aria-selected="true"] .ui-option-text {
  font-weight: 900;
}

.ui-options-empty {
  padding: var(--sp-6) var(--sp-4);
  color: var(--c-text-2);
  text-align: center;
}

/* ---------- Chọn nhiều (học sinh): tìm kiếm, lọc theo tổ, hàng có ô tick ---------- */

.ui-multi {
  min-width: 0;
  border: 0;
  padding: 0;
}

.ui-multi > .ui-field-label {
  padding: 0;
}

.ui-multi-tools {
  display: grid;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}

.ui-multi .ui-options {
  margin: 0;
}

.ui-multi-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-1) var(--sp-3);
  min-height: 44px;
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 700;
}

.ui-multi-bar b {
  color: var(--c-text);
  font-weight: 900;
}

.ui-multi-bar span {
  margin-right: auto;
}

.ui-multi-link {
  min-height: 44px;
  padding: 0;
  border: 0;
  background: none;
  color: var(--c-primary);
  font: inherit;
  font-weight: 800;
}

.ui-multi-input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

/* Vạch ngăn chỉ giữa các dòng đang hiện (khi lọc, dòng hiện đầu tiên không có vạch phía trên) */
.ui-multi-list .ui-option + .ui-option::before {
  display: none;
}

.ui-multi-list .ui-option:not([hidden]) ~ .ui-option:not([hidden])::before {
  display: block;
}

.ui-multi .ui-option:has(.ui-multi-input:checked) {
  background: var(--c-primary-soft);
}

.ui-multi .ui-option:has(.ui-multi-input:checked) .ui-option-check {
  border-color: var(--c-coral);
  background: var(--c-coral);
  color: #fff;
  transform: scale(1.06);
}

.ui-multi .ui-option:has(.ui-multi-input:focus-visible) {
  outline: 3px solid color-mix(in srgb, var(--c-primary) 50%, transparent);
  outline-offset: -3px;
}

/* ---------- Nhập điểm theo cột: STT · họ tên · ô điểm lớn ---------- */

.ui-grade-tools {
  display: grid;
  gap: var(--sp-2);
  margin: 0 var(--sp-4) var(--sp-3);
}

.ui-grade-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
}

.ui-grade-progress {
  color: var(--c-text-2);
  font-size: var(--fs-md);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.ui-grade-progress b {
  color: var(--c-text);
  font-weight: 900;
}

.ui-grade-list {
  margin: 0 var(--sp-4);
  border-radius: var(--r-lg);
  background: var(--c-surface);
  box-shadow: var(--ring);
  overflow: hidden;
}

.ui-grade-row {
  position: relative;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--sp-3);
  min-height: 64px;
  padding: var(--sp-2) var(--sp-4);
  transition: background-color 120ms;
}

.ui-grade-row:not([hidden]) ~ .ui-grade-row:not([hidden])::before {
  content: "";
  position: absolute;
  top: 0;
  right: var(--sp-4);
  left: 70px;
  border-top: 2px dotted var(--c-line);
}

.ui-grade-row.is-changed {
  background: var(--c-primary-soft);
}

.ui-grade-row.is-locked .ui-grade-title {
  color: var(--c-text-2);
}

.ui-grade-name {
  display: grid;
  min-width: 0;
  cursor: pointer;
}

.ui-grade-title {
  overflow: hidden;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.ui-grade-name small {
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 600;
  line-height: 1.35;
}

.ui-grade-name .ui-field-error:empty {
  display: none;
}

.ui-grade-old,
.ui-grade-conflict {
  color: var(--c-warning) !important;
  font-weight: 800 !important;
}

.ui-grade-input.ui-input {
  width: 84px;
  min-height: 52px;
  padding: 0 var(--sp-2);
  font-size: 1.375rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.ui-grade-cell.is-changed .ui-grade-input {
  border-color: var(--c-coral);
}

.ui-grade-cell.has-error .ui-grade-input {
  border-color: var(--c-danger);
  background: var(--c-danger-soft);
}

.ui-grade-locked {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 84px;
  min-height: 52px;
  border-radius: var(--r-md);
  background: var(--c-fill);
  color: var(--c-text-2);
  font-size: 1.125rem;
  font-weight: 900;
}

/* Môn nhận xét: nhóm nút xuống dòng dưới tên để tên không bị cắt ở màn hình 360px */
.ui-grade-row.is-pass {
  grid-template-columns: 42px minmax(0, 1fr);
  row-gap: var(--sp-2);
}

.ui-grade-row.is-pass .ui-grade-cell {
  grid-column: 2;
  justify-self: start;
}

.ui-grade-row.is-pass .ui-grade-title {
  white-space: normal;
}

/* Ô điểm dùng chung: lỗi, điểm cũ, gợi ý nằm ngay dưới ô (chế độ theo học sinh, bảng) */
.ui-grade-cell {
  display: grid;
  justify-items: center;
  gap: 2px;
  min-width: 0;
}

.ui-grade-cell .ui-field-error:empty {
  display: none;
}

.ui-grade-cell small,
.ui-grade-cell .ui-field-error {
  max-width: 120px;
  font-size: var(--fs-xs);
  line-height: 1.25;
  text-align: center;
}

.ui-grade-hint {
  color: var(--c-text-2);
  font-weight: 700;
}

.ui-grade-cell-label {
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 800;
}

/* Theo học sinh: mỗi em một thẻ, các ô xếp hàng ngang (4 ô một hàng ở màn hình 360px) */
.ui-grade-cards {
  display: grid;
  gap: var(--sp-3);
  margin: 0 var(--sp-4);
}

.ui-grade-card {
  padding: var(--sp-3) var(--sp-3) var(--sp-4);
  border-radius: var(--r-lg);
  background: var(--c-surface);
  box-shadow: var(--ring);
  transition: background-color 120ms;
}

.ui-grade-card.is-changed {
  background: var(--c-primary-soft);
}

.ui-grade-card-head {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.ui-grade-cells {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(64px, 1fr));
  gap: var(--sp-3) var(--sp-2);
}

.ui-grade-card .ui-grade-input.ui-input,
.ui-grade-card .ui-grade-locked {
  width: 100%;
  min-width: 0;
  max-width: 84px;
  font-size: 1.125rem;
}

.ui-grade-cell--student .ui-grade-pass {
  flex-direction: column;
}

.ui-grade-cell--student .ui-grade-pass-opt span {
  min-width: 52px;
  min-height: 36px;
}

/* Bảng đầy đủ: như mẫu Excel, cột họ tên cố định khi cuộn ngang (chỉ cuộn bên trong bảng) */
.ui-grade-table-wrap {
  margin: 0 var(--sp-4);
  overflow-x: auto;
  border-radius: var(--r-lg);
  background: var(--c-surface);
  box-shadow: var(--ring);
}

.ui-grade-table {
  width: max-content;
  min-width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-variant-numeric: tabular-nums;
}

.ui-grade-table th,
.ui-grade-table td {
  padding: var(--sp-2);
  border-bottom: 2px dotted var(--c-line);
  vertical-align: middle;
  text-align: center;
}

.ui-grade-table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--c-fill);
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 900;
}

.ui-grade-table .ui-grade-table-name {
  position: sticky;
  left: 0;
  z-index: 1;
  min-width: 150px;
  max-width: 220px;
  background: var(--c-surface);
  font-weight: 800;
  text-align: left;
  box-shadow: 2px 0 0 var(--c-line);
}

.ui-grade-table thead .ui-grade-table-name {
  z-index: 3;
  background: var(--c-fill);
}

.ui-grade-table-no {
  color: var(--c-text-2);
  font-weight: 800;
}

.ui-grade-table tr.is-changed td,
.ui-grade-table tr.is-changed .ui-grade-table-name {
  background: var(--c-primary-soft);
}

.ui-grade-table .ui-grade-input.ui-input,
.ui-grade-table .ui-grade-locked {
  width: 64px;
  min-width: 64px;
  min-height: 44px;
  font-size: 1.0625rem;
}

/* Bảng đầy đủ chỉ hợp màn hình rộng/xoay ngang: ẩn lựa chọn "Bảng" khi màn hình hẹp */
@media (max-width: 599.98px) {
  .ui-grade-modes .ui-segment:last-child {
    display: none;
  }
}

/* Môn nhận xét: 3 nút Đ / CĐ / – */
.ui-grade-pass {
  display: inline-flex;
  padding: 3px;
  border-radius: 16px;
  background: var(--c-fill);
}

.ui-grade-pass-opt {
  position: relative;
  cursor: pointer;
}

.ui-grade-pass-opt input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.ui-grade-pass-opt span {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  border-radius: 13px;
  color: var(--c-text-2);
  font-weight: 900;
}

.ui-grade-pass-opt input:checked + span {
  background: var(--c-surface);
  color: var(--c-text);
  box-shadow: var(--shadow-1);
}

.ui-grade-pass-opt input:focus-visible + span {
  outline: 3px solid color-mix(in srgb, var(--c-primary) 50%, transparent);
}

/* Chip dạng nút bật/tắt (lọc theo tổ) dùng cùng mặt chip với chip có ô chọn */
button.ui-chip {
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
}

.ui-chip[aria-pressed="true"] .ui-chip-face {
  background: var(--c-ink);
  box-shadow: none;
  color: var(--c-on-ink);
}

/* Hành động trong action sheet */
.ui-action {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  width: calc(100% - 2 * var(--sp-4));
  min-height: 58px;
  margin: 0 var(--sp-4) var(--sp-2);
  padding: 0 var(--sp-4);
  border: 0;
  border-radius: var(--r-md);
  background: var(--c-surface);
  box-shadow: var(--ring);
  color: var(--c-text);
  font-size: var(--fs-base);
  font-weight: 800;
  text-align: left;
  cursor: pointer;
}

.ui-action:active {
  background: var(--c-surface-press);
}

.ui-action > .ui-icon {
  color: var(--c-text-2);
}

.ui-action--danger,
.ui-action--danger > .ui-icon {
  color: var(--c-danger);
}

/* ---------- Toast ---------- */

.ui-toast-host {
  position: fixed;
  z-index: 60;
  left: 50%;
  bottom: calc(var(--sp-4) + var(--safe-bottom));
  transform: translateX(-50%);
  width: calc(100% - 2 * var(--sp-4));
  max-width: calc(var(--w-frame) - 2 * var(--sp-4));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--sp-2);
  pointer-events: none;
}

.has-tabbar .ui-toast-host {
  bottom: calc(var(--h-tabbar) + var(--tabbar-gap) * 2 + var(--safe-bottom));
}

.has-actionbar .ui-toast-host {
  bottom: calc(var(--h-actionbar) + var(--safe-bottom) + var(--sp-3));
}

.has-tabbar.has-actionbar .ui-toast-host {
  bottom: calc(var(--h-tabbar) + var(--tabbar-gap) * 2 + var(--h-actionbar) + var(--safe-bottom));
}

.ui-toast {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  max-width: 100%;
  min-height: 52px;
  padding: var(--sp-3) var(--sp-4);
  border-radius: 18px;
  background: var(--c-ink);
  color: var(--c-on-ink);
  font-size: var(--fs-md);
  font-weight: 800;
  box-shadow: var(--shadow-2);
  pointer-events: auto;
  opacity: 0;
  transform: translateY(14px) scale(0.98);
  transition: opacity 220ms var(--ease), transform 260ms var(--spring);
}

.ui-toast.is-shown {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.ui-toast > .ui-icon { color: #b7adff; }
.ui-toast--success > .ui-icon { color: #6fe0bf; }
.ui-toast--error > .ui-icon { color: #ff9b85; }
.ui-toast--warning > .ui-icon { color: var(--c-sun); }

/* ---------- Skeleton ---------- */

.ui-skeleton {
  margin: 0 var(--sp-4);
  background: var(--c-surface);
  border-radius: var(--r-lg);
  box-shadow: var(--ring);
  overflow: hidden;
}

.ui-skeleton-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  min-height: 64px;
  padding: var(--sp-3) var(--sp-4);
}

.ui-skeleton-row + .ui-skeleton-row {
  border-top: 2px dotted var(--c-line);
}

.ui-skeleton-circle,
.ui-skeleton-line {
  background: linear-gradient(90deg, var(--c-fill) 25%, #fdf6ee 50%, var(--c-fill) 75%);
  background-size: 200% 100%;
  animation: ui-shimmer 1.3s ease-in-out infinite;
}

.ui-skeleton-circle {
  flex: none;
  width: 42px;
  height: 42px;
  border-radius: 15px;
}

.ui-skeleton-lines {
  flex: 1;
}

.ui-skeleton-line {
  height: 12px;
  border-radius: 6px;
}

.ui-skeleton-line + .ui-skeleton-line {
  width: 55%;
  margin-top: 8px;
}

@keyframes ui-shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

/* ---------- Trạng thái rỗng ---------- */

.ui-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: var(--sp-8) var(--sp-6);
  text-align: center;
}

.ui-empty-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 88px;
  height: 88px;
  margin-bottom: var(--sp-4);
  border: 4px solid #fff;
  border-radius: 30px;
  background: var(--c-violet);
  color: #fff;
  box-shadow: var(--shadow-tile);
  transform: rotate(-6deg);
}

.ui-empty-icon .ui-icon {
  transform: rotate(6deg);
}

.ui-empty-title {
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 900;
  text-wrap: balance;
}

.ui-empty-text {
  max-width: 320px;
  margin: var(--sp-2) 0 0;
  color: var(--c-text-2);
  font-size: var(--fs-md);
}

.ui-empty-actions {
  width: 100%;
  max-width: 320px;
  margin-top: var(--sp-5);
}

/* Nút "Xem thêm" */
.ui-load-more {
  margin: var(--sp-3) var(--sp-4) 0;
}

.ui-section-body > .ui-load-more {
  margin-left: 0;
  margin-right: 0;
}

/* Nút hiện/ẩn mật khẩu nằm trong ô */
.ui-input-wrap--toggle > .ui-input {
  padding-left: 16px;
  padding-right: 54px;
}

.ui-password-toggle {
  position: absolute;
  top: 50%;
  right: 4px;
  transform: translateY(-50%);
  color: var(--c-text-3);
}

.ui-password-toggle:active {
  transform: translateY(-50%) scale(0.94);
}

.ui-password-toggle[aria-pressed="true"] {
  color: var(--c-primary);
}

/* ---------- Trang đăng nhập (mẫu B "vở ô li": lề đỏ, logo i ♥ Lớp, lợi ích dạng danh sách tick) ---------- */

.ui-login { position: relative; padding-bottom: var(--sp-6); }
.ui-login::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 30px;
  width: 2px;
  background: color-mix(in srgb, var(--c-coral) 45%, transparent);
}

.ui-login-top { position: relative; padding: var(--sp-6) var(--sp-5) var(--sp-1) 46px; }
.ui-login-brand { display: flex; align-items: center; gap: 14px; }

/* Biểu tượng: mảnh giấy kẻ dòng có chữ i và trái tim dán góc */
.ui-login-note {
  position: relative;
  flex: none;
  width: 64px;
  height: 72px;
  overflow: hidden;
  border-radius: 6px 14px 14px 14px;
  background: #fff;
  box-shadow: var(--ring), 0 10px 20px -14px rgba(42, 31, 23, 0.6);
  transform: rotate(-5deg);
}
.ui-login-note::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(transparent 0 11px, color-mix(in srgb, var(--c-sky) 30%, transparent) 11px 12px);
}
.ui-login-note::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 14px;
  width: 2px;
  background: color-mix(in srgb, var(--c-coral) 60%, transparent);
}
.ui-login-note span { position: absolute; z-index: 1; left: 20px; top: 8px; color: var(--c-text); font-size: 30px; font-weight: 900; }
.ui-login-note svg { position: absolute; z-index: 1; right: 6px; bottom: 6px; width: 34px; height: 34px; transform: rotate(10deg); }
.ui-login-note svg path, .ui-login-heart path { fill: var(--c-coral); }

.ui-login-word { margin: 0; color: var(--c-text); font-size: 42px; font-weight: 900; line-height: 1; letter-spacing: -0.035em; }
.ui-login-word em { font-style: normal; color: var(--c-coral); }
.ui-login-heart { display: inline-block; width: 0.78em; height: 0.78em; margin: 0 0.04em; vertical-align: -0.02em; }
.ui-login-squiggle { display: block; width: 92px; height: 10px; margin: 4px 0 0 34px; }
.ui-login-squiggle path { fill: none; stroke: var(--c-coral); stroke-width: 3; stroke-linecap: round; }

.ui-login-meaning { margin: var(--sp-2) 0 0; color: var(--c-text-2); font-size: var(--fs-sm); font-weight: 800; letter-spacing: 0.02em; }
.ui-login-hand { margin: var(--sp-4) 0 0; color: var(--c-text); font-size: 22px; font-weight: 900; line-height: 1.25; text-wrap: balance; }
.ui-login-hand mark {
  padding: 0 2px;
  background: linear-gradient(transparent 58%, color-mix(in srgb, var(--c-sun) 75%, transparent) 58%);
  color: inherit;
}

.ui-login-form { position: relative; margin: var(--sp-4) var(--sp-4) 0 40px; }
.ui-login-form .ui-card { margin: 0; }
.ui-login-forgot { margin: 10px 4px 0; color: var(--c-text-2); font-size: var(--fs-md); }

.ui-login-list { position: relative; display: grid; gap: 14px; margin: var(--sp-6) 18px 0 46px; padding: 0; list-style: none; }
.ui-login-list li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; color: var(--c-text); font-size: 15.5px; line-height: 1.45; }
.ui-login-list li::before {
  content: "✓";
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 2px solid var(--c-teal);
  border-radius: 8px;
  color: var(--c-teal);
  font-size: 15px;
  font-weight: 900;
  transform: rotate(-4deg);
}
.ui-login-list b { font-weight: 900; }
.ui-login-sign { position: relative; margin: var(--sp-6) var(--sp-5) 0 46px; color: var(--c-text-2); font-size: var(--fs-md); font-style: italic; }

@media (prefers-reduced-motion: no-preference) {
  .ui-login-beat { transform-box: fill-box; transform-origin: 50% 60%; animation: ui-login-beat 2.4s ease-in-out infinite; }
  @keyframes ui-login-beat {
    0%, 60%, 100% { transform: scale(1); }
    70% { transform: scale(1.18); }
    80% { transform: scale(1); }
    88% { transform: scale(1.1); }
  }
}
/* ---------- Hiệu ứng vào trang ---------- */

@media (prefers-reduced-motion: no-preference) {
  /* "backwards": sau khi chạy xong không giữ transform, để không đè hiệu ứng nhấn/vị trí của sheet, FAB. */
  .app-content > :not(dialog):not(.ui-fab) {
    animation: ui-rise 360ms var(--ease) backwards;
  }

  .app-content > *:nth-child(2) { animation-delay: 40ms; }
  .app-content > *:nth-child(3) { animation-delay: 80ms; }
  .app-content > *:nth-child(n + 4) { animation-delay: 120ms; }
}

@keyframes ui-rise {
  from { transform: translateY(10px); opacity: 0.001; }
  to { transform: none; opacity: 1; }
}

/* ---------- Giảm chuyển động ---------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    transition-duration: 1ms !important;
  }
}

/* ---------------- Thông báo ---------------- */
.ui-announce { display: flex; flex-direction: column; gap: var(--sp-3); }
.ui-announce .ui-list-tags { margin-top: 0; }
.ui-announce-title {
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 800;
  line-height: 1.3;
  overflow-wrap: anywhere;
  text-wrap: balance;
}
.ui-announce-meta { margin: calc(-1 * var(--sp-2)) 0 0; color: var(--c-text-2); font-size: var(--fs-sm); }
.ui-announce-body {
  font-size: var(--fs-base);
  line-height: 1.6;
  white-space: pre-line;
  overflow-wrap: anywhere;
}
.ui-announce .ui-note { margin: 0; }

/* ---------------- Chọn ngày kiểu Việt Nam (ui-field type="date") ---------------- */
.ui-date-trigger {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  text-align: left;
  cursor: pointer;
}
.ui-date-trigger:active { background: var(--c-surface-press); }
.ui-date-trigger:focus-visible {
  outline: none;
  border-color: var(--c-primary);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--c-primary) 16%, transparent);
}
.ui-date-trigger > .ui-icon { color: var(--c-text-2); }
.ui-date-value { flex: 1; min-width: 0; font-variant-numeric: tabular-nums; }
.ui-date-value.is-placeholder { color: var(--c-text-3); font-weight: 600; }

.ui-cal-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-2);
  margin-bottom: var(--sp-2);
}
.ui-cal-heading {
  flex: 1;
  min-height: var(--h-touch);
  border: 0;
  border-radius: var(--r-pill);
  background: transparent;
  color: var(--c-text);
  font: inherit;
  font-size: var(--fs-lg);
  font-weight: 800;
  cursor: pointer;
}
.ui-cal-heading:not(:disabled):active { background: var(--c-surface-press); }
.ui-cal-heading:disabled { cursor: default; }

.ui-cal-grid { display: grid; gap: 4px; }
.ui-cal-grid--days { grid-template-columns: repeat(7, 1fr); }
.ui-cal-grid--months,
.ui-cal-grid--years { grid-template-columns: repeat(3, 1fr); gap: var(--sp-2); }

.ui-cal-weekday {
  padding: 4px 0;
  color: var(--c-text-3);
  font-size: var(--fs-sm);
  font-weight: 800;
  text-align: center;
}
.ui-cal-cell {
  min-height: var(--h-touch);
  border: 0;
  border-radius: var(--r-sm);
  background: transparent;
  color: var(--c-text);
  font: inherit;
  font-size: var(--fs-base);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  cursor: pointer;
}
.ui-cal-grid--months .ui-cal-cell,
.ui-cal-grid--years .ui-cal-cell { min-height: 52px; background: var(--c-fill); }
.ui-cal-cell:active { background: var(--c-surface-press); }
.ui-cal-cell.is-today { box-shadow: inset 0 0 0 2px var(--c-primary); color: var(--c-primary); }
.ui-cal-cell.is-selected { background: var(--c-primary); color: var(--c-on-primary); box-shadow: none; }
.ui-cal-cell:disabled { color: var(--c-line-strong); background: transparent; cursor: default; }
.ui-cal-cell:focus-visible { outline: 3px solid color-mix(in srgb, var(--c-primary) 40%, transparent); outline-offset: 1px; }

.ui-cal-actions { display: flex; gap: var(--sp-2); margin-top: var(--sp-4); }
.ui-cal-actions .ui-btn { flex: 1; }

/* ---------------- Quản trị hệ thống đang hỗ trợ GVCN ---------------- */
.ui-support-bar {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  margin: var(--sp-2) var(--sp-4) var(--sp-3);
  padding: var(--sp-2) var(--sp-2) var(--sp-2) var(--sp-3);
  border-radius: var(--r-md);
  background: var(--c-sun-soft);
  color: var(--c-sun-ink);
  box-shadow: inset 0 0 0 2px var(--c-sun);
  font-size: var(--fs-md);
  line-height: 1.35;
}
.ui-support-text { flex: 1; min-width: 0; }
.ui-support-exit {
  min-height: var(--h-touch);
  padding: 0 var(--sp-4);
  border: 0;
  border-radius: var(--r-pill);
  background: var(--c-ink);
  color: var(--c-on-ink);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}
.ui-support-exit:active { opacity: 0.85; }

/* Nút gia hạn nhanh (trang lớp của quản trị) */
.ui-expiry-presets { margin-bottom: var(--sp-4); }

/* ---------------- Biểu đồ (ui-chart) ---------------- */
.ui-chart { margin: 0; }
.ui-chart-canvas { position: relative; width: 100%; }
.ui-chart-empty { margin: 0; padding: var(--sp-4) 0; color: var(--c-text-3); text-align: center; }
.ui-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2) var(--sp-4);
  margin: var(--sp-3) 0 0;
  padding: 0;
  list-style: none;
  color: var(--c-text-2);
  font-size: var(--fs-sm);
  font-weight: 700;
}
.ui-chart-legend li { display: flex; align-items: center; gap: 6px; }
.ui-chart-swatch { width: 22px; height: 0; border-top: 3px solid var(--c-coral); }
.ui-chart-swatch.is-dashed { border-top-style: dashed; }
.ui-chart-swatch--teal { border-top-color: var(--c-teal); }
.ui-chart-swatch--sun { border-top-color: var(--c-sun); }
.ui-chart-swatch--violet { border-top-color: var(--c-violet); }
.ui-chart-swatch--muted { border-top-color: var(--c-text-3); }

/* Thanh tỉ lệ trong danh sách (vd lỗi vi phạm nhiều nhất) */
.ui-meter { height: 8px; margin-top: 6px; border-radius: var(--r-pill); background: var(--c-fill); overflow: hidden; }
.ui-meter > span { display: block; height: 100%; border-radius: inherit; background: var(--c-coral); }
.ui-trend { font-weight: 800; white-space: nowrap; }
.ui-trend--up { color: var(--c-success); }
.ui-trend--down { color: var(--c-danger); }

/* ---------------- Phản hồi: tin nhắn dạng bong bóng ---------------- */
.ui-msgs { display: flex; flex-direction: column; gap: var(--sp-3); margin: 0; padding: 0; list-style: none; }
.ui-msg {
  max-width: 88%;
  align-self: flex-start;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-lg) var(--r-lg) var(--r-lg) var(--r-sm);
  background: var(--c-surface);
  box-shadow: var(--ring);
}
.ui-msg--mine {
  align-self: flex-end;
  border-radius: var(--r-lg) var(--r-lg) var(--r-sm) var(--r-lg);
  background: var(--c-primary-soft);
  box-shadow: none;
}
.ui-msg-meta { margin-bottom: 4px; color: var(--c-text-2); font-size: var(--fs-sm); font-weight: 700; }
.ui-msg-body { font-size: var(--fs-base); line-height: 1.55; white-space: pre-line; overflow-wrap: anywhere; }
.ui-note-link { color: inherit; text-decoration: none; }
.ui-note-link:active { opacity: 0.85; }

/* Khối dữ liệu thô (nhật ký: giá trị cũ → mới), xuống dòng thay vì cuộn ngang */
.ui-code {
  margin: 0;
  padding: var(--sp-3) var(--sp-4);
  border-radius: var(--r-md);
  background: var(--c-surface);
  box-shadow: var(--ring);
  color: var(--c-text);
  font-family: ui-monospace, Consolas, "Courier New", monospace;
  font-size: var(--fs-sm);
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

/* ---------- Hướng dẫn theo màn hình: thẻ gợi ý lần đầu, nút "?" ---------- */

.ui-appbar-help {
  color: var(--c-violet);
}

.ui-guide-card {
  padding: var(--sp-4);
  border-radius: var(--r-lg);
  background: var(--c-violet-soft);
  border: 2px solid rgba(107, 92, 231, 0.28);
}

.ui-guide-head {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.ui-guide-sticker {
  flex: none;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  border: 3px solid #fff;
  background: var(--c-violet);
  color: #fff;
  box-shadow: var(--shadow-sticker);
  transform: rotate(-4deg);
}

.ui-guide-eyebrow {
  margin: 0;
  color: var(--c-violet);
  font-size: var(--fs-sm);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ui-guide-title {
  margin: 0;
  font-size: var(--fs-xl);
  font-weight: 900;
  line-height: 1.2;
}

.ui-guide-steps {
  margin: var(--sp-3) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: guide;
  display: grid;
  gap: var(--sp-2);
  font-size: var(--fs-lg);
  line-height: 1.45;
}

.ui-guide-steps li {
  counter-increment: guide;
  position: relative;
  padding-left: 38px;
  min-height: 28px;
}

.ui-guide-steps li::before {
  content: counter(guide);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: var(--c-violet);
  color: #fff;
  font-size: var(--fs-md);
  font-weight: 900;
}

.ui-guide-steps--all {
  margin-top: 0;
}

.ui-guide-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.ui-guide-later {
  margin: var(--sp-3) 0 0;
  color: var(--c-text-2);
  font-size: var(--fs-md);
}

.ui-guide-later .ui-icon {
  vertical-align: -3px;
  color: var(--c-violet);
}

.ui-guide-tip.is-leaving {
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 200ms, transform 200ms;
}