/* ═══════════════════════════════════════════════════════════════════
   KMA SS — bảng giờ.
   Nền sương xám, mực xanh đá dịu, một sắc đất dành riêng cho vạch giờ.
   Chữ: Be Vietnam Pro (giao diện) + JetBrains Mono (giờ, mã, tiền).
   Hiệu ứng chỉ dùng transform/opacity để chạy mượt trên máy yếu.
   ═══════════════════════════════════════════════════════════════════ */

:root {
  --paper:      #EFF1F3;
  --surface:    #FFFFFF;
  --surface-2:  #F6F8F9;
  --surface-3:  #E9EDEF;
  --ink:        #1B2430;
  --ink-2:      #3E4957;
  --muted:      #67717F;
  --faint:      #949DA9;
  --rule:       #E2E7EA;
  --rule-2:     #CBD3D9;
  --accent:     #3D5A80;
  --accent-2:   #32496A;
  --accent-soft:#E7ECF3;
  --on-accent:  #FFFFFF;
  --signal:     #C4605E;
  --positive:   #4E7D6E;
  --positive-soft:#E6EFEB;
  --warn-bg:    #F8F0DF;
  --warn-ink:   #7C5A21;
  --err-bg:     #F8E9E8;
  --err-ink:    #9B3F3D;

  --shadow-1: 0 1px 2px rgba(27, 36, 48, .05);
  --shadow-2: 0 4px 16px rgba(27, 36, 48, .10);
  --shadow-3: 0 16px 40px rgba(27, 36, 48, .18);

  --r-sm: 7px;
  --r-md: 11px;
  --r-lg: 15px;

  --font: 'Be Vietnam Pro', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Một thang khoảng cách duy nhất. Mọi padding và gap lấy từ đây, để nhịp
     giữa các khối luôn là bội số của nhau thay vì mỗi chỗ một con số lẻ. */
  --s1: 4px;
  --s2: 8px;
  --s3: 12px;
  --s4: 16px;
  --s5: 24px;
  --s6: 32px;

  --row-h: 58px;
  --tap: 40px;
  --topbar-h: 54px;
  --dur: .16s;
  --ease: cubic-bezier(.2, .7, .3, 1);
}

:root[data-density="compact"] { --row-h: 46px; }
:root[data-density="roomy"]   { --row-h: 72px; }

[data-theme="dark"] {
  --paper:      #10151B;
  --surface:    #171D25;
  --surface-2:  #1C232C;
  --surface-3:  #242D38;
  --ink:        #E4E9EF;
  --ink-2:      #C3CBD5;
  --muted:      #8A94A2;
  --faint:      #6B7583;
  --rule:       #262E39;
  --rule-2:     #35404E;
  --accent:     #8FAAD0;
  --accent-2:   #A6BCDC;
  --accent-soft:#1E2937;
  --on-accent:  #0F141A;
  --signal:     #E08D8A;
  --positive:   #7FB8A5;
  --positive-soft:#182620;
  --warn-bg:    #2A2416;
  --warn-ink:   #E0C081;
  --err-bg:     #2A1A1A;
  --err-ink:    #E79B98;

  --shadow-1: 0 1px 2px rgba(0, 0, 0, .35);
  --shadow-2: 0 4px 16px rgba(0, 0, 0, .45);
  --shadow-3: 0 16px 40px rgba(0, 0, 0, .6);
}

:root[data-motion="off"] *,
:root[data-motion="off"] *::before,
:root[data-motion="off"] *::after { animation: none !important; transition: none !important; }

/* ── nền tảng ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: none;
}

h1, h2, h3 { margin: 0; font-weight: 600; letter-spacing: -.015em; }
p { margin: 0; }

button, input, select, textarea { font: inherit; color: inherit; }
button { -webkit-tap-highlight-color: transparent; }

svg { width: 18px; height: 18px; fill: none; stroke: currentColor;
      stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 5px; }

[hidden] { display: none !important; }

.eyebrow {
  display: block;
  font-family: var(--mono); font-size: 10.5px; font-weight: 500;
  letter-spacing: .1em; text-transform: uppercase; color: var(--faint);
}
.sub { color: var(--muted); font-size: 13px; }
.mono { font-family: var(--mono); }

.card {
  background: var(--surface);
  border: 1px solid var(--rule);
  border-radius: var(--r-lg);
}

/* ── nút ────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  height: var(--tap); padding: 0 15px;
  border: 1px solid transparent; border-radius: var(--r-sm);
  background: transparent; font-size: 13.5px; font-weight: 500;
  cursor: pointer; white-space: nowrap;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn:active { transform: scale(.97); }
.btn svg { width: 17px; height: 17px; }
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover:not(:disabled) { background: var(--accent-2); }
.btn-primary:disabled { opacity: .55; cursor: default; }
.btn-quiet { border-color: var(--rule-2); color: var(--ink-2); background: var(--surface); }
.btn-quiet:hover { background: var(--surface-3); }
.btn-danger { color: var(--err-ink); border-color: transparent; background: var(--err-bg); }
.btn-block { width: 100%; height: 44px; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  height: 36px; min-width: 36px; padding: 0 9px;
  border: 1px solid var(--rule-2); border-radius: var(--r-sm);
  background: var(--surface); color: var(--ink-2);
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.icon-btn:hover { background: var(--surface-3); color: var(--ink); }
.icon-btn:active { transform: scale(.96); }
.icon-btn.is-wide { padding: 0 13px; font-size: 13px; font-weight: 500; }

.btn-group { display: inline-flex; }
.btn-group .icon-btn { border-radius: 0; margin-left: -1px; }
.btn-group .icon-btn:first-child { border-radius: var(--r-sm) 0 0 var(--r-sm); margin-left: 0; }
.btn-group .icon-btn:last-child  { border-radius: 0 var(--r-sm) var(--r-sm) 0; }
.icon-btn:hover, .icon-btn:focus-visible { position: relative; z-index: 1; }

.is-loading .ico-refresh { animation: spin .8s linear infinite; transform-origin: 12px 12px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── segmented ──────────────────────────────────────────────────── */
.segmented { display: inline-flex; padding: 3px; gap: 2px; background: var(--surface-3); border-radius: 9px; }
.segmented .seg {
  border: 0; border-radius: 6px; background: transparent; color: var(--muted);
  padding: 7px 14px; font-size: 13px; font-weight: 500; cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.segmented .seg:hover { color: var(--ink); }
.segmented .seg.is-active { background: var(--surface); color: var(--ink); }
.segmented-sm .seg { padding: 6px 11px; font-size: 12.5px; }

/* ── công tắc ───────────────────────────────────────────────────── */
.switch { position: relative; display: inline-block; flex: none; }
.switch input { position: absolute; opacity: 0; width: 100%; height: 100%; margin: 0; cursor: pointer; }
.switch-track { display: block; width: 44px; height: 26px; border-radius: 999px; background: var(--rule-2);
  transition: background-color var(--dur) var(--ease); }
.switch-track::after {
  content: ''; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px;
  border-radius: 50%; background: #fff; box-shadow: var(--shadow-1);
  transition: transform var(--dur) var(--ease);
}
.switch input:checked + .switch-track { background: var(--accent); }
.switch input:checked + .switch-track::after { transform: translateX(18px); }
.switch input:focus-visible + .switch-track { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── ô nhập ─────────────────────────────────────────────────────── */
.field { margin-bottom: 14px; }
.field label { display: block; margin-bottom: 6px; font-size: 12.5px; font-weight: 500; color: var(--ink-2); }
.hint { margin-top: 5px; font-size: 11.5px; color: var(--faint); line-height: 1.45; }
input[type="text"], input[type="password"], input[type="search"], input[type="number"],
input[type="date"], select, textarea {
  width: 100%; height: 44px; padding: 0 12px;
  background: var(--surface-2); border: 1px solid var(--rule-2);
  border-radius: var(--r-sm); font-size: 15px;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
  -webkit-appearance: none; appearance: none;
}
textarea { height: auto; padding: 10px 12px; resize: vertical; min-height: 72px; line-height: 1.5; }
select { background-image: none; }
input::placeholder, textarea::placeholder { color: var(--faint); }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); background: var(--surface); }
.field input.is-bad { border-color: var(--signal); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.field-row .field { margin-bottom: 14px; }

.input-wrap { position: relative; }
.input-wrap input { padding-right: 64px; }
.input-action {
  position: absolute; right: 5px; top: 5px; height: 34px; padding: 0 10px;
  border: 0; border-radius: var(--r-sm); background: transparent;
  color: var(--muted); font-size: 12.5px; font-weight: 500; cursor: pointer;
}
.input-action:hover { background: var(--surface-3); color: var(--ink); }

.form-error { margin-top: 12px; padding: 10px 12px; border-radius: var(--r-sm);
  background: var(--err-bg); color: var(--err-ink); font-size: 13px; }
.fine-print { margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--rule);
  color: var(--faint); font-size: 11.5px; line-height: 1.55; }

/* ── logo ───────────────────────────────────────────────────────── */
.mark { display: inline-flex; align-items: center; gap: 9px; }
.mark img { border-radius: 6px; }
.mark-name { font-family: var(--mono); font-weight: 500; font-size: 15px; letter-spacing: -.02em; color: var(--ink); }
.mark-name span { color: var(--accent); }
.mark-sm .mark-name { font-size: 13.5px; }

/* ══════════ ĐĂNG NHẬP ══════════ */
.login-view { min-height: 100dvh; display: grid; }
.login-grid { display: grid; grid-template-columns: 1.05fr .95fr; min-height: 100dvh;
  max-width: 1160px; width: 100%; margin: 0 auto; }
.login-pitch { display: flex; flex-direction: column; justify-content: center; gap: 20px;
  padding: 56px clamp(24px, 5vw, 60px); }
.pitch-title { font-size: clamp(26px, 3.2vw, 38px); line-height: 1.18; letter-spacing: -.03em; }
.pitch-sub { max-width: 42ch; color: var(--muted); font-size: 15px; }
.pitch-list { margin: 4px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; max-width: 46ch; }
.pitch-list li { padding-left: 15px; border-left: 2px solid var(--rule-2); font-size: 13.5px; color: var(--muted); }
.pitch-list b { display: block; color: var(--ink); font-weight: 600; font-size: 13.5px; }
.login-panel {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  padding: 32px 24px 56px;
}
.login-card { width: 100%; max-width: 380px; padding: 28px; box-shadow: var(--shadow-2); }
.login-panel .credit { width: 100%; max-width: 380px; margin-top: 20px; padding-top: 0; border-top: 0; }
.login-card h2 { font-size: 20px; }
.login-card .sub { margin: 5px 0 22px; }

@media (max-width: 900px) {
  .login-grid { grid-template-columns: 1fr; }
  .login-pitch { padding: 36px 22px 0; gap: 14px; }
  .pitch-list { display: none; }
  .login-panel { padding: 20px 18px 36px; justify-content: flex-start; }
  .login-card { padding: 22px; border: 0; box-shadow: none; background: transparent; }
}

/* ══════════ KHUNG ỨNG DỤNG ══════════ */
.app-view { min-height: 100dvh; display: flex; flex-direction: column; }

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 16px;
  height: var(--topbar-h); padding: 0 clamp(14px, 3vw, 24px);
  background: var(--surface); border-bottom: 1px solid var(--rule);
}
.topnav { margin: 0 auto; }
.topbar-end { display: flex; align-items: center; gap: 10px; }

.app-main { flex: 1; width: 100%; max-width: 1400px; margin: 0 auto;
  padding: 16px clamp(14px, 3vw, 24px) 64px; }
.pane { display: none; }
.pane.is-active { display: block; animation: fadeup .18s var(--ease); }
@keyframes fadeup { from { opacity: 0; transform: translateY(4px); } }

.tabbar { display: none; }

.banner { margin-bottom: 14px; padding: 11px 14px; border-radius: var(--r-md); font-size: 13px; }
.banner.warn { background: var(--warn-bg); color: var(--warn-ink); }
.banner.err  { background: var(--err-bg);  color: var(--err-ink); }

.empty { margin-top: 14px; padding: 36px 20px; text-align: center; color: var(--muted); font-size: 13.5px;
  border: 1px dashed var(--rule-2); border-radius: var(--r-lg); background: var(--surface); }

.toast-root { position: fixed; left: 0; right: 0; bottom: calc(18px + env(safe-area-inset-bottom));
  display: flex; flex-direction: column; align-items: center; gap: 8px; z-index: 200; pointer-events: none; }
.toast { padding: 10px 16px; border-radius: 999px; background: var(--ink); color: var(--paper);
  font-size: 13px; box-shadow: var(--shadow-2); animation: toastin .2s var(--ease); }
@keyframes toastin { from { opacity: 0; transform: translateY(10px); } }

/* ── thanh tuần ─────────────────────────────────────────────────── */
.weekbar { padding: 14px 16px; margin-bottom: 14px; }
.weekbar-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.weekbar-title { font-size: 19px; margin-top: 2px; }
.weekbar-tools { display: flex; align-items: center; gap: 7px; }

.daystrip { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; margin-top: 14px; }
.day-chip {
  display: flex; flex-direction: column; align-items: center; gap: 1px;
  padding: 8px 2px 7px; border: 1px solid var(--rule); border-radius: var(--r-md);
  background: var(--surface-2); cursor: pointer;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.day-chip:active { transform: scale(.97); }
.dc-label { font-family: var(--mono); font-size: 10.5px; color: var(--faint); letter-spacing: .05em; }
.dc-num { font-size: 16px; font-weight: 600; line-height: 1.15; }
.dc-dots { display: flex; gap: 3px; height: 5px; margin-top: 3px; }
.dc-dots i { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); opacity: .5; }
.day-chip.is-today { border-color: var(--accent); background: var(--accent-soft); }
.day-chip.is-today .dc-num, .day-chip.is-today .dc-label { color: var(--accent); }
.day-chip.is-selected { box-shadow: inset 0 0 0 1.5px var(--accent); border-color: var(--accent); }
.day-chip.is-empty .dc-num { color: var(--faint); font-weight: 500; }

.upnext { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 12px;
  padding: 10px 12px; border-radius: var(--r-md); background: var(--surface-2);
  border: 1px solid var(--rule); font-size: 13px; }
.un-tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase;
  padding: 3px 7px; border-radius: 5px; background: var(--accent); color: var(--on-accent); }
.un-name { font-weight: 600; }
.un-meta { font-family: var(--mono); color: var(--muted); font-size: 12.5px; }
.upnext.is-live .un-tag { background: var(--signal); color: #fff; }

/* ── lưới thời khóa biểu ────────────────────────────────────────── */
.tt-wrap {
  border-radius: var(--r-lg); border: 1px solid var(--rule); background: var(--surface);
  /* Cuộn dọc vẫn thuộc về trang, ngang thì nhường cho cử chỉ vuốt đổi ngày. */
  touch-action: pan-y;
}
.tt { contain: layout paint; }

.tt-head { display: grid; position: sticky; top: var(--topbar-h); z-index: 20;
  background: var(--surface); border-bottom: 1px solid var(--rule-2);
  border-radius: var(--r-lg) var(--r-lg) 0 0; }
.tt-head-cell { padding: 9px 6px; display: flex; flex-direction: column; align-items: center; gap: 1px;
  border-left: 1px solid var(--rule); }
.tt-head-cell:first-child { border-left: 0; flex-direction: row; align-items: flex-end;
  justify-content: center; padding-bottom: 9px; }
.th-day { font-size: 12.5px; font-weight: 600; color: var(--ink-2); }
.th-date { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.tt-head-cell.is-today { background: var(--accent-soft); }
.tt-head-cell.is-today .th-day, .tt-head-cell.is-today .th-date { color: var(--accent); }
.th-unit { font-family: var(--mono); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); }

.tt-body { display: grid; position: relative; overflow: hidden; border-radius: 0 0 var(--r-lg) var(--r-lg); }
.tt-gutter { position: relative; border-right: 1px solid var(--rule-2); background: var(--surface-2); }
.tt-tick { position: absolute; left: 0; right: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 1px; border-bottom: 1px solid var(--rule); }
.tk-num { font-family: var(--mono); font-size: 12px; font-weight: 500; color: var(--ink-2); }
.tk-time { font-family: var(--mono); font-size: 10px; color: var(--faint); }
.tt-tick.is-now .tk-num { color: var(--signal); }

.tt-col { position: relative; border-left: 1px solid var(--rule); }
.tt-col.is-today { background: color-mix(in srgb, var(--accent-soft) 45%, transparent); }
.tt-col.is-weekend { background: color-mix(in srgb, var(--surface-3) 45%, transparent); }
.tt-slot { position: absolute; left: 0; right: 0; border-bottom: 1px solid var(--rule); }
.tt-slot.is-past { background: color-mix(in srgb, var(--surface-3) 40%, transparent); }

.tt-break { position: absolute; left: 0; right: 0; border-bottom: 1px solid var(--rule);
  background: repeating-linear-gradient(135deg, transparent 0 5px,
    color-mix(in srgb, var(--rule-2) 55%, transparent) 5px 6px); }
.tt-gutter .tt-break { display: flex; align-items: center; justify-content: center; background: none;
  font-family: var(--mono); font-size: 8.5px; letter-spacing: .06em; color: var(--faint); }

.tt-now { position: absolute; left: 0; right: 0; height: 0; z-index: 15; pointer-events: none; }
.tt-now::after { content: ''; position: absolute; left: var(--gutter); right: 0; top: -1px;
  height: 2px; background: var(--signal); }
.now-chip { position: absolute; left: 4px; top: -9px; width: calc(var(--gutter) - 8px);
  text-align: center; font-family: var(--mono); font-size: 10px; font-weight: 500; line-height: 18px;
  color: #fff; background: var(--signal); border-radius: 5px; }

/* khối môn học */
.ev {
  position: absolute; overflow: hidden; display: flex; padding: 0; text-align: left;
  border-radius: var(--r-sm); background: var(--ev-bg); border: 1px solid var(--ev-line);
  cursor: pointer; -webkit-appearance: none; appearance: none;
  transition: transform var(--dur) var(--ease);
}
.ev::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--ev-key); }
.ev:hover { transform: translateY(-1px); z-index: 12; }
.ev:active { transform: scale(.985); }
.ev-in { padding: 6px 7px 6px 10px; min-width: 0; width: 100%; display: flex; flex-direction: column; gap: 2px; }
.ev-title { font-size: 12.5px; font-weight: 600; line-height: 1.25; color: var(--ev-ink);
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.ev-foot { margin-top: auto; display: flex; gap: 6px; align-items: baseline; min-width: 0; }
.ev-time, .ev-room { font-family: var(--mono); font-size: 10.5px; color: var(--ev-ink); opacity: .8; }
.ev-room { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ev.is-short .ev-in { padding: 4px 6px 4px 9px; gap: 0; flex-direction: row; align-items: baseline; }
.ev.is-short .ev-title { -webkit-line-clamp: 1; font-size: 11.5px; }
.ev.is-short .ev-foot { margin: 0 0 0 auto; }
.ev.is-short .ev-time { display: none; }
.ev.is-narrow .ev-room, .ev.is-narrow .ev-time { font-size: 9.5px; }
.ev.is-done { opacity: .62; }
.ev.is-live { box-shadow: inset 0 0 0 1.5px var(--signal); }
.ev-flag { position: absolute; right: 4px; top: 4px; width: 5px; height: 5px; border-radius: 50%;
  background: var(--ev-key); }

/* ══════════ DANH SÁCH MÔN ══════════ */
.stat-strip { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  margin-bottom: 12px; overflow: hidden; }
.stat { padding: 14px 16px; border-left: 1px solid var(--rule); }
.stat:first-child { border-left: 0; }
.stat-num { font-family: var(--mono); font-size: 22px; font-weight: 500; letter-spacing: -.02em; }
.stat-lab { font-size: 12px; color: var(--muted); margin-top: 1px; }

.toolbar { display: flex; gap: 10px; margin-bottom: 12px; }
.search { position: relative; flex: 1; min-width: 0; }
.search svg { position: absolute; left: 12px; top: 50%; margin-top: -9px; width: 17px; height: 17px; color: var(--faint); }
.search input { padding-left: 36px; height: var(--tap); font-size: 14px; background: var(--surface); }
.search input::-webkit-search-cancel-button { -webkit-appearance: none; }

.course-list { display: grid; gap: 10px; }
.course {
  display: flex; gap: 12px; padding: 14px 15px; text-align: left; width: 100%;
  background: var(--surface); border: 1px solid var(--rule); border-radius: var(--r-lg);
  cursor: pointer; contain: content;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.course:hover { border-color: var(--rule-2); }
.course:active { transform: scale(.995); }
.course-key { width: 4px; border-radius: 3px; background: var(--ev-key); flex: none; }
.course-body { flex: 1; min-width: 0; }
.course-top { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.course-name { font-size: 15px; font-weight: 600; letter-spacing: -.01em; }
.course-code { font-family: var(--mono); font-size: 11px; color: var(--muted);
  background: var(--surface-3); padding: 2px 6px; border-radius: 5px; }
.badge { font-size: 10.5px; font-weight: 500; padding: 2px 7px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); }
.course-meta { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 8px; }
.meta-item { font-size: 12.5px; color: var(--muted); }
.meta-item b { color: var(--ink-2); font-weight: 500; }
.meta-item .mono { font-size: 12px; }
.course-time { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--rule);
  font-size: 12.5px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 6px; }
.pill { font-family: var(--mono); font-size: 11px; padding: 2px 7px; border-radius: 5px;
  background: var(--surface-2); border: 1px solid var(--rule); color: var(--ink-2); }

/* ══════════ HỌC PHÍ ══════════ */
.money-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 10px; margin-bottom: 12px; }
.money-card { padding: 16px; }
.money-lab { font-size: 12.5px; color: var(--muted); }
.money-num { font-family: var(--mono); font-size: 23px; font-weight: 500; letter-spacing: -.02em; margin-top: 3px; }
.money-num small { font-size: 12px; color: var(--muted); margin-left: 3px; font-family: var(--font); }
.money-card.is-paid .money-num { color: var(--positive); }
.money-card.is-due .money-num { color: var(--signal); }
.money-card.is-clear .money-num { color: var(--positive); }

.progress { height: 8px; border-radius: 999px; background: var(--surface-3); overflow: hidden; margin: 12px 0 6px; }
.progress i { display: block; width: 100%; height: 100%; border-radius: 999px; background: var(--positive);
  transform: scaleX(0); transform-origin: left; transition: transform .45s var(--ease); }
.progress-note { display: flex; justify-content: space-between; font-size: 12px; color: var(--muted); }

.section { margin-top: 16px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 8px; }
.section-head h3 { font-size: 15px; }
.section-head span { font-size: 12.5px; color: var(--muted); }

.rowlist { overflow: hidden; }
.rowitem { display: flex; align-items: center; gap: 12px; padding: 13px 15px; border-top: 1px solid var(--rule); }
.rowitem:first-child { border-top: 0; }
.rowitem-main { flex: 1; min-width: 0; }
.rowitem-title { font-size: 13.5px; font-weight: 500; }
.rowitem-sub { font-size: 12px; color: var(--muted); margin-top: 2px; }
.rowitem-amt { font-family: var(--mono); font-size: 14px; text-align: right; white-space: nowrap; }
.rowitem-amt.is-paid { color: var(--positive); }
.rowitem-amt.is-due { color: var(--signal); }

/* ══════════ CÀI ĐẶT ══════════ */
.settings { max-width: 640px; display: grid; gap: 12px; }
.set-block { padding: 4px 18px 8px; }
.set-block h3 { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--faint); padding: 15px 0 10px; font-weight: 500; }
.set-row { display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 13px 0; border-top: 1px solid var(--rule); }
.set-text { min-width: 0; }
.set-text b { display: block; font-weight: 500; font-size: 13.5px; }
.set-text span { display: block; margin-top: 2px; color: var(--muted); font-size: 12.5px; }
#settings-student { font-family: var(--mono); }
.keys { list-style: none; margin: 0; padding: 0 0 4px; }
.keys li { display: flex; align-items: center; gap: 7px; padding: 8px 0; border-top: 1px solid var(--rule);
  font-size: 13px; color: var(--muted); }
.keys li span { margin-left: 6px; }
kbd { font-family: var(--mono); font-size: 11px; min-width: 24px; text-align: center; padding: 3px 6px;
  border-radius: 5px; background: var(--surface-3); border: 1px solid var(--rule-2); border-bottom-width: 2px; color: var(--ink-2); }
.set-foot { color: var(--faint); font-size: 11.5px; margin-top: 12px; border-top: 1px solid var(--rule); padding: 12px 0 6px; }

/* ══════════ MODAL / SHEET ══════════ */
.overlay { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center;
  padding: 20px; background: rgba(15, 20, 26, .48); animation: fade .15s var(--ease); }
@keyframes fade { from { opacity: 0; } }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } }
@keyframes slideup { from { transform: translateY(100%); } }

.sheet { width: 100%; max-width: 420px; max-height: calc(100dvh - 40px);
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--rule); border-radius: var(--r-lg);
  box-shadow: var(--shadow-3); animation: rise .18s var(--ease); overflow: hidden; }
.sheet-wide { max-width: 520px; }
.sheet-head { display: flex; align-items: flex-start; gap: 12px; padding: 16px; border-bottom: 1px solid var(--rule); flex: none; }
.sheet-key { width: 4px; align-self: stretch; border-radius: 3px; background: var(--ev-key); flex: none; }
.sheet-head h3 { font-size: 16px; line-height: 1.3; flex: 1; }
.sheet-close { flex: none; width: 32px; height: 32px; border: 0; border-radius: var(--r-sm);
  background: var(--surface-3); color: var(--muted); cursor: pointer; font-size: 19px; line-height: 1; }
.sheet-close:hover { color: var(--ink); }
.sheet-body {
  padding: 4px 16px 16px; overflow-y: auto; -webkit-overflow-scrolling: touch; flex: 1;
  overscroll-behavior: contain;   /* cuộn hết cửa sổ không kéo theo trang phía sau */
}
.sheet-foot { display: flex; gap: 10px; padding: 12px 16px calc(12px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--rule); background: var(--surface); flex: none; }
.sheet-foot .btn { flex: 1; }

.dl { display: grid; grid-template-columns: 104px 1fr; }
.dl dt { padding: 10px 0; color: var(--muted); font-size: 12.5px; border-top: 1px solid var(--rule); }
.dl dd { padding: 10px 0; margin: 0; font-size: 13px; border-top: 1px solid var(--rule); word-break: break-word; }
.dl dd.mono { font-size: 12.5px; }
.dl dt:first-of-type, .dl dd:first-of-type { border-top: 0; }

/* nhóm trường trong form thêm môn */
.form-group { margin-top: 14px; }
.form-group > .group-title { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--faint); margin-bottom: 10px; }
.meeting { border: 1px solid var(--rule); border-radius: var(--r-md); padding: 12px; margin-bottom: 10px;
  background: var(--surface-2); }
.meeting-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.meeting-head b { font-size: 13px; font-weight: 500; }
.link-btn { border: 0; background: none; color: var(--signal); font-size: 12.5px; cursor: pointer; padding: 4px 6px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  min-width: 40px; height: 38px; padding: 0 10px; border-radius: var(--r-sm);
  border: 1px solid var(--rule-2); background: var(--surface); color: var(--ink-2);
  font-size: 13px; cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.chip:active { transform: scale(.95); }
.chip.is-on { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.chips-periods .chip { min-width: 0; flex: 1 0 calc(100% / 6 - 6px); font-family: var(--mono); font-size: 12.5px; }
.slot-note { margin-top: 8px; font-family: var(--mono); font-size: 11.5px; color: var(--muted); }
.add-meeting { width: 100%; height: 42px; border: 1px dashed var(--rule-2); border-radius: var(--r-md);
  background: transparent; color: var(--accent); font-size: 13px; font-weight: 500; cursor: pointer; }
.add-meeting:hover { background: var(--accent-soft); }

/* lịch chọn ngày */
.cal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.cal-head h3 { font-size: 15px; }
.cal-nav { display: flex; gap: 6px; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 2px; }
.cal-dow { font-family: var(--mono); font-size: 10px; color: var(--faint); text-align: center; padding-bottom: 6px; }
.cal-day { aspect-ratio: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
  border-radius: var(--r-sm); font-size: 13.5px; cursor: pointer; border: 1px solid transparent;
  background: none; transition: background-color var(--dur) var(--ease); }
.cal-day:hover { background: var(--surface-3); }
.cal-day.is-out { color: var(--faint); opacity: .45; }
.cal-day.is-today { border-color: var(--accent); color: var(--accent); font-weight: 600; }
.cal-day.in-week { background: var(--accent-soft); }
.cd-dot { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); opacity: 0; margin-top: 2px; }
.cal-day.has-class .cd-dot { opacity: .55; }

/* ══════════ ĐIỆN THOẠI ══════════ */
@media (max-width: 860px) {
  body { font-size: 14.5px; }
  .topbar { padding: 0 14px; }
  .topnav { display: none; }
  .hide-sm { display: none; }
  .app-main { padding: 12px 12px calc(78px + env(safe-area-inset-bottom)); }

  .tabbar {
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 50;
    display: grid; grid-template-columns: repeat(4, 1fr);
    background: var(--surface); border-top: 1px solid var(--rule);
    padding-bottom: env(safe-area-inset-bottom);
  }
  .tabbar-btn { display: flex; flex-direction: column; align-items: center; gap: 3px;
    padding: 9px 0 8px; border: 0; background: none; color: var(--faint); cursor: pointer;
    transition: color var(--dur) var(--ease); }
  .tabbar-btn svg { width: 21px; height: 21px; }
  .tabbar-btn span { font-size: 10.5px; font-weight: 500; }
  .tabbar-btn.is-active { color: var(--accent); }
  .tabbar-btn:active { transform: scale(.94); }

  .weekbar { padding: 12px; border-radius: var(--r-md); }
  .weekbar-title { font-size: 17px; }
  .weekbar-row { align-items: center; }
  .daystrip { gap: 4px; }
  .day-chip { padding: 8px 0 7px; }
  .tt-head { top: var(--topbar-h); }
  .ev-title { font-size: 13.5px; -webkit-line-clamp: 2; }
  .ev-time, .ev-room { font-size: 11.5px; }

  .stat-strip { grid-template-columns: repeat(3, 1fr); }
  .stat { padding: 12px 10px; }
  .stat-num { font-size: 19px; }
  .stat-lab { font-size: 11px; }
  .toolbar { position: sticky; top: var(--topbar-h); z-index: 15;
    padding: 8px 0; margin: -8px 0 8px; background: var(--paper); }
  .course { padding: 13px; border-radius: var(--r-md); }
  .money-grid { grid-template-columns: 1fr; gap: 8px; }
  .money-card { padding: 14px; border-radius: var(--r-md); }
  .money-num { font-size: 21px; }

  /* cửa sổ trượt lên từ đáy — quen tay trên điện thoại */
  .overlay { align-items: flex-end; padding: 0; }
  .sheet, .sheet-wide { max-width: none; width: 100%; max-height: 92dvh;
    border-radius: 18px 18px 0 0; border-bottom: 0; animation: slideup .22s var(--ease); }
  .sheet::before { content: ''; display: block; width: 38px; height: 4px; border-radius: 3px;
    background: var(--rule-2); margin: 8px auto 0; flex: none; }
  .sheet-head { padding: 12px 16px 14px; }
  .sheet-foot { padding-bottom: calc(14px + env(safe-area-inset-bottom)); }
  .dl { grid-template-columns: 96px 1fr; }
  .chips-periods .chip { flex: 1 0 calc(100% / 4 - 6px); height: 42px; }
  .chip { height: 42px; }
}

@media (max-width: 380px) {
  .stat-strip { grid-template-columns: repeat(3, 1fr); }
  .daystrip { gap: 3px; }
  .dc-num { font-size: 15px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

/* ══════════ ĐIỂM & GPA ══════════ */
.gpa-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 10px; }
.gpa-card { padding: 16px; }
.gpa-lab { font-size: 12.5px; color: var(--muted); }
.gpa-num { font-family: var(--mono); font-size: 26px; font-weight: 500; letter-spacing: -.02em; margin-top: 2px; }
.gpa-num small { font-family: var(--font); font-size: 12px; color: var(--faint); margin-left: 4px; }
.gpa-note { font-size: 11.5px; color: var(--faint); margin-top: 3px; }
.gpa-card.is-good .gpa-num { color: var(--positive); }
.gpa-card.is-bad .gpa-num { color: var(--signal); }

.term { margin-top: 16px; }
.term-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 8px; }
.term-head h3 { font-size: 14.5px; }
.term-head span { font-family: var(--mono); font-size: 12px; color: var(--muted); }

.grade-row { display: flex; align-items: center; gap: 12px; padding: 12px 14px; width: 100%;
  text-align: left; background: none; border: 0; border-top: 1px solid var(--rule); cursor: pointer;
  transition: background-color var(--dur) var(--ease); }
.grade-row:first-child { border-top: 0; }
.grade-row:hover { background: var(--surface-2); }
.grade-main { flex: 1; min-width: 0; }
.grade-name { font-size: 13.5px; font-weight: 500; }
.grade-sub { font-family: var(--mono); font-size: 11.5px; color: var(--muted); margin-top: 2px; }
.grade-score { font-family: var(--mono); font-size: 14px; color: var(--ink-2); width: 42px; text-align: right; }
.letter {
  flex: none; min-width: 40px; height: 30px; padding: 0 8px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: var(--r-sm); font-family: var(--mono); font-size: 12.5px; font-weight: 500;
  background: var(--surface-3); color: var(--muted);
}
.letter.is-pass { background: var(--positive-soft); color: var(--positive); }
.letter.is-fail { background: var(--err-bg); color: var(--err-ink); }
.grade-row.is-excluded { opacity: .5; }
.grade-row.is-uncertain .grade-name::after {
  content: ' ⚠'; color: var(--warn-ink); font-size: 12px;
}

.paste-area { width: 100%; min-height: 190px; font-family: var(--mono); font-size: 12px;
  line-height: 1.55; white-space: pre; overflow-wrap: normal; overflow-x: auto; }
.steps { margin: 0 0 14px; padding-left: 20px; color: var(--muted); font-size: 13px; }
.steps li { margin-bottom: 5px; }
.steps b { color: var(--ink-2); font-weight: 500; }
.steps a { color: var(--accent); }

.preview-list { border: 1px solid var(--rule); border-radius: var(--r-md); overflow: hidden; margin-top: 6px; }
.preview-row { display: flex; align-items: center; gap: 10px; padding: 9px 11px; border-top: 1px solid var(--rule); }
.preview-row:first-child { border-top: 0; }
.preview-row.is-uncertain { background: var(--warn-bg); }
.preview-main { flex: 1; min-width: 0; }
.preview-name { font-size: 13px; font-weight: 500; }
.preview-sub { font-family: var(--mono); font-size: 11px; color: var(--muted); margin-top: 1px; }
.credit-input { width: 62px; height: 34px; padding: 0 8px; font-family: var(--mono);
  font-size: 13px; text-align: center; flex: none; }
.preview-note { font-size: 12px; color: var(--muted); margin: 10px 0 4px; }

/* ══════════ THANH CREDIT ══════════ */
.credit {
  display: flex; align-items: center; justify-content: center; gap: 12px;
  margin-top: 28px; padding: 14px 0 4px;
  border-top: 1px solid var(--rule);
  font-size: 12.5px; color: var(--faint);
}
.credit-text b { font-weight: 600; color: var(--muted); }
.credit-links { display: inline-flex; gap: 6px; }
.credit-link {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 8px; color: var(--faint);
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.credit-link svg { width: 17px; height: 17px; fill: currentColor; stroke: none; }
.credit-link:hover { background: var(--surface-3); color: var(--accent); }

@media (max-width: 860px) {
  .gpa-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
  .gpa-card { padding: 13px; border-radius: var(--r-md); }
  .gpa-num { font-size: 22px; }
  .grade-score { display: none; }
  .paste-area { min-height: 160px; font-size: 11.5px; }

  /* Trên điện thoại thanh credit chỉ hiện ở cuối trang Cài đặt,
     chỗ duy nhất người dùng cuộn tới hết mà không vướng thanh tab dưới. */
  .app-view .credit { display: none; }
  body[data-tab="settings"] .app-view .credit { display: flex; margin-top: 20px; }
}

/* ── bảng chọn khi nhập điểm ── */
.imp-legend { display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  padding: 9px 0 11px; font-size: 12px; color: var(--muted); }
.imp-legend i { display: inline-block; width: 9px; height: 9px; border-radius: 3px;
  margin-right: 5px; vertical-align: -1px; }
.imp-legend .k-new { background: var(--positive); }
.imp-legend .k-upd { background: var(--accent); }
.imp-legend .k-dup { background: var(--warn-ink); }
.imp-count { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--ink-2); }

.imp-list { border: 1px solid var(--rule); border-radius: var(--r-md); overflow: hidden; }
.imp-row { display: flex; align-items: center; gap: 10px; padding: 9px 11px;
  border-top: 1px solid var(--rule); border-left: 3px solid transparent; }
.imp-row:first-child { border-top: 0; }
.imp-row.k-new { border-left-color: var(--positive); }
.imp-row.k-upd { border-left-color: var(--accent); }
.imp-row.k-dup { border-left-color: var(--warn-ink); background: var(--warn-bg); }
.imp-check { width: 20px; height: 20px; flex: none; margin: 0; accent-color: var(--accent); cursor: pointer; }
.imp-main { flex: 1; min-width: 0; cursor: pointer; }
.imp-name { font-size: 13px; font-weight: 500; }
.imp-sub { font-family: var(--mono); font-size: 11px; color: var(--muted); margin-top: 1px; }
.imp-scores { font-family: var(--mono); font-size: 11.5px; color: var(--muted); white-space: nowrap; }
.imp-tag { flex: none; font-size: 10.5px; padding: 2px 7px; border-radius: 999px;
  background: var(--surface-3); color: var(--muted); white-space: nowrap; }
.imp-tag.k-upd { background: var(--accent-soft); color: var(--accent); }
.imp-tag.k-dup { background: color-mix(in srgb, var(--warn-ink) 18%, transparent); color: var(--warn-ink); }

/* ── chọn màu cho môn ── */
.swatches { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.swatch { width: 34px; height: 34px; border-radius: 9px; border: 2px solid transparent;
  cursor: pointer; padding: 0; transition: transform var(--dur) var(--ease); }
.swatch span { display: block; width: 100%; height: 100%; border-radius: 6px; }
.swatch:active { transform: scale(.92); }
.swatch.is-on { border-color: var(--ink); }
.swatch-auto { display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); border: 1px dashed var(--rule-2); font-size: 10.5px; color: var(--muted); }
.swatch-auto.is-on { border-style: solid; border-color: var(--ink); }

@media (max-width: 860px) {
  .imp-scores { display: none; }
  .imp-row { padding: 10px; gap: 9px; }
}

/* ── điền nhanh số tín chỉ ── */
.fill-row { padding: 12px 0; border-top: 1px solid var(--rule); }
.fill-row:first-child { border-top: 0; }
.fill-row.is-done { opacity: .55; }
.fill-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 8px; }
.fill-name { font-size: 13.5px; font-weight: 500; flex: 1; min-width: 0; }
.fill-term { font-family: var(--mono); font-size: 11px; color: var(--faint); white-space: nowrap; }
.fill-chips { display: flex; gap: 6px; flex-wrap: wrap; }
.fill-chips .chip { min-width: 44px; height: 38px; font-family: var(--mono); }
.fill-other { width: 62px; height: 38px; padding: 0 8px; text-align: center;
  font-family: var(--mono); font-size: 13px; }
.banner-action { display: flex; align-items: center; gap: 12px; }
.banner-action span { flex: 1; }
.banner-action .btn { height: 32px; padding: 0 12px; background: var(--surface); border-color: var(--rule-2); }

/* ── chuyển tuần / chuyển ngày ── */
@keyframes ttNext { from { opacity: .35; transform: translate3d(16px, 0, 0); } }
@keyframes ttPrev { from { opacity: .35; transform: translate3d(-16px, 0, 0); } }
.tt.slide-next { animation: ttNext .2s var(--ease); }
.tt.slide-prev { animation: ttPrev .2s var(--ease); }

/* ── khung chờ ── */
.skeleton-wrap { display: grid; gap: 8px; padding: 12px; }
.skeleton {
  border-radius: var(--r-sm);
  background: linear-gradient(90deg, var(--surface-2) 20%, var(--surface-3) 40%, var(--surface-2) 60%);
  background-size: 300% 100%;
  animation: shimmer 1.3s linear infinite;
}
@keyframes shimmer { to { background-position: -300% 0; } }

/* ── vòng quay khởi động ── */
.boot { position: fixed; inset: 0; display: grid; place-items: center; background: var(--paper); z-index: 60; }
.boot span { width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid var(--rule-2); border-top-color: var(--accent);
  animation: spin .7s linear infinite; }

/* ── cột trống ở chế độ một ngày ── */
.col-empty { position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 13px; color: var(--faint); pointer-events: none; }

@media (max-width: 860px) {
  /* Vùng chạm rộng hơn cho ngón tay. */
  .icon-btn { height: 40px; min-width: 40px; }
  .sheet-close { width: 36px; height: 36px; }
}

/* ══════════ CHAT ══════════ */
/* Khung cao cố định, chỉ vùng tin nhắn cuộn — ô nhập luôn nằm trong tầm ngón
   tay thay vì trôi theo trang. */
.chat {
  display: flex; flex-direction: column;
  /* Giá trị tạm cho lần vẽ đầu; fitChatHeight() đo lại ngay sau đó. */
  height: calc(100dvh - var(--topbar-h) - 96px);
  min-height: 280px;
  background: var(--surface); border: 1px solid var(--rule);
  border-radius: var(--r-lg); overflow: hidden;
}

.chat-bar { display: flex; align-items: center; gap: 10px; padding: 8px 10px;
  border-bottom: 1px solid var(--rule); background: var(--surface-2); }
.chat-rooms { display: flex; gap: 4px; overflow-x: auto; scrollbar-width: none; flex: 1; }
.chat-rooms::-webkit-scrollbar { display: none; }
.room-btn { flex: none; padding: 7px 13px; border: 0; border-radius: 999px; cursor: pointer;
  background: transparent; color: var(--muted); font-size: 13px; font-weight: 500;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease); }
.room-btn:hover { color: var(--ink); }
.room-btn.is-active { background: var(--accent); color: var(--on-accent); }
.room-btn .room-dot { display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--signal); margin-left: 6px; vertical-align: 1px; }
.chat-meta { display: flex; align-items: center; gap: 8px; flex: none; }
.chat-online { font-family: var(--mono); font-size: 11px; color: var(--muted); white-space: nowrap; }
.chat-online::before { content: ''; display: inline-block; width: 6px; height: 6px; border-radius: 50%;
  background: var(--positive); margin-right: 5px; vertical-align: 1px; }

.chat-log { flex: 1; overflow-y: auto; overscroll-behavior: contain;
  padding: 12px 14px; display: flex; flex-direction: column; gap: 2px; }
.chat-day { align-self: center; margin: 12px 0 8px; padding: 3px 10px; border-radius: 999px;
  background: var(--surface-3); font-family: var(--mono); font-size: 10.5px; color: var(--muted); }
.chat-more { align-self: center; margin-bottom: 8px; }

.msg { display: flex; gap: 9px; padding: 3px 0; }
.msg-avatar { width: 30px; height: 30px; border-radius: 9px; flex: none;
  display: grid; place-items: center; font-size: 11.5px; font-weight: 600;
  background: var(--ev-bg); color: var(--ev-ink); }
.msg-body { min-width: 0; flex: 1; }
.msg-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 1px; }
.msg-author { font-size: 12.5px; font-weight: 600; color: var(--ev-key); }
.msg-time { font-family: var(--mono); font-size: 10.5px; color: var(--faint); }
.msg-text { font-size: 14px; line-height: 1.45; white-space: pre-wrap; overflow-wrap: anywhere; }
.msg.is-mine .msg-text { color: var(--ink); }
.msg.is-gone .msg-text { color: var(--faint); font-style: italic; }
.msg-quote { border-left: 2px solid var(--rule-2); padding-left: 8px; margin-bottom: 3px;
  font-size: 12px; color: var(--muted); overflow: hidden; text-overflow: ellipsis;
  white-space: nowrap; cursor: pointer; }
.msg-quote b { color: var(--ink-2); font-weight: 500; }
/* Nối tiếp cùng người trong vài phút thì bỏ đầu, đọc như một đoạn liền. */
.msg.is-cont { padding-top: 0; }
.msg.is-cont .msg-avatar { visibility: hidden; height: 0; }
.msg.is-cont .msg-head { display: none; }
.msg-tools { display: flex; gap: 2px; align-self: flex-start; opacity: 0; flex: none;
  transition: opacity var(--dur) var(--ease); }
.msg:hover .msg-tools, .msg:focus-within .msg-tools { opacity: 1; }
.msg-tool { width: 28px; height: 28px; border: 0; border-radius: 7px; background: transparent;
  color: var(--faint); cursor: pointer; display: grid; place-items: center; }
.msg-tool:hover { background: var(--surface-3); color: var(--ink); }
.msg-tool svg { width: 15px; height: 15px; }
.msg-flash { animation: flash 1.1s var(--ease); }
@keyframes flash { from { background: var(--accent-soft); } }

.chat-reply { display: flex; align-items: center; gap: 10px; padding: 8px 14px;
  border-top: 1px solid var(--rule); background: var(--surface-2); font-size: 12.5px; color: var(--muted); }
.chat-reply span { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.chat-form { padding: var(--s2); border-top: 1px solid var(--rule); background: var(--surface); }
.chat-form textarea { max-height: 132px; }
.chat-form .btn { width: 44px; height: 44px; padding: 0; }
.chat-empty { margin: auto; text-align: center; color: var(--faint); font-size: 13.5px; }

@media (max-width: 860px) {
  .chat { border-radius: var(--r-md); }
  /* Chỉ ở chế độ chat mới bỏ khoảng đệm đáy: khung chat đã tự chừa chỗ cho
     thanh tab, còn danh sách bài viết thì vẫn cần đệm để dòng cuối không bị
     thanh tab che mất. */
  body[data-tab="forum"][data-forum-mode="chat"] .app-main {
    padding-bottom: var(--s2); overflow: hidden;
  }
  .chat-log { padding: 10px; }
  .msg-tools { opacity: 1; }
  .msg-tool { width: 32px; height: 32px; }
  .tabbar-btn span { font-size: 10px; }
  .tabbar-btn svg { width: 20px; height: 20px; }
}

/* ══════════ DIỄN ĐÀN ══════════ */
.forum-switch { display: flex; align-items: center; gap: var(--s3); margin-bottom: var(--s3); }
.forum-switch .segmented { flex: 1; }
.forum-switch .seg { flex: 1; }

/* ── ảnh đại diện dùng lại ở mọi chỗ có tên người ── */
.ava { flex: none; border-radius: 10px; overflow: hidden; display: grid; place-items: center;
  background: var(--ev-bg); color: var(--ev-ink); font-weight: 600; }
.ava img { width: 100%; height: 100%; object-fit: cover; display: block; }
.ava-30 { width: 30px; height: 30px; font-size: 11.5px; }
.ava-38 { width: 38px; height: 38px; font-size: 13px; border-radius: 12px; }
.ava-72 { width: 72px; height: 72px; font-size: 24px; border-radius: 20px; }
.admin-tag { font-size: 10px; font-weight: 600; padding: 1px 6px; border-radius: 999px;
  background: var(--signal); color: #fff; letter-spacing: .02em; }

/* ── danh sách bài viết ── */
.post-list { display: grid; gap: 10px; }
.post-card { display: flex; gap: 12px; padding: 14px; width: 100%; text-align: left;
  background: var(--surface); border: 1px solid var(--rule); border-radius: var(--r-lg);
  cursor: pointer; contain: content;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease); }
.post-card:hover { border-color: var(--rule-2); }
.post-card:active { transform: scale(.995); }
.post-main { flex: 1; min-width: 0; }
.post-top { display: flex; align-items: center; gap: 7px; flex-wrap: wrap; margin-bottom: 4px; }
.post-author { font-size: 12.5px; font-weight: 500; color: var(--ink-2); }
.post-dot { color: var(--faint); font-size: 11px; }
.post-when { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.post-topic { font-size: 10.5px; padding: 2px 7px; border-radius: 999px;
  background: var(--accent-soft); color: var(--accent); }
.post-title { font-size: 15.5px; font-weight: 600; letter-spacing: -.01em; line-height: 1.3; }
.post-excerpt { margin-top: 4px; font-size: 13px; color: var(--muted); line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.post-foot { display: flex; align-items: center; gap: 14px; margin-top: 9px; }
.post-stat { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; color: var(--muted); }
.post-stat svg { width: 15px; height: 15px; }
.post-stat.is-on { color: var(--signal); }
.post-stat.is-on svg { fill: var(--signal); stroke: var(--signal); }
.pin-tag { font-size: 10.5px; padding: 2px 7px; border-radius: 999px;
  background: var(--warn-bg); color: var(--warn-ink); }

/* ── bài viết đầy đủ ── */
.post-full { font-size: 14.5px; line-height: 1.6; white-space: pre-wrap; overflow-wrap: anywhere; }
.post-byline { display: flex; align-items: center; gap: 10px; padding: 10px 0 14px;
  border-bottom: 1px solid var(--rule); margin-bottom: 14px; }
.post-byline .who { flex: 1; min-width: 0; }
.post-byline .who b { display: block; font-size: 13.5px; font-weight: 600; }
.post-byline .who span { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.post-actions { display: flex; gap: 8px; padding: 14px 0; border-top: 1px solid var(--rule);
  margin-top: 14px; flex-wrap: wrap; }
.comment { display: flex; gap: 10px; padding: 12px 0; border-top: 1px solid var(--rule); }
.comment-body { flex: 1; min-width: 0; }
.comment-head { display: flex; align-items: baseline; gap: 8px; }
.comment-head b { font-size: 12.5px; font-weight: 600; }
.comment-text { font-size: 13.5px; line-height: 1.5; white-space: pre-wrap;
  overflow-wrap: anywhere; margin-top: 2px; }

/* ── hồ sơ ── */
.cover { position: relative; height: 120px; margin: -4px -16px 0; background: var(--surface-3);
  background-size: cover; background-position: center; }
.cover-empty { display: grid; place-items: center; color: var(--faint); font-size: 12px; }
.profile-head { display: flex; align-items: flex-end; gap: 12px; margin: -30px 0 12px; position: relative; }
.profile-head .ava { border: 3px solid var(--surface); }
.profile-who { padding-bottom: 4px; min-width: 0; }
.profile-who b { display: block; font-size: 16px; }
.profile-who span { font-size: 12px; color: var(--muted); }
.profile-bio { font-size: 13.5px; line-height: 1.5; color: var(--ink-2); white-space: pre-wrap; }
.pick-row { display: flex; gap: 8px; margin-top: 8px; flex-wrap: wrap; }

/* ── bảng quản trị ── */
.admin-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(88px, 1fr)); gap: 8px; }
.admin-stat { padding: 10px; border-radius: var(--r-md); background: var(--surface-2);
  border: 1px solid var(--rule); }
.admin-stat b { display: block; font-family: var(--mono); font-size: 18px; font-weight: 500; }
.admin-stat span { font-size: 11px; color: var(--muted); }
.admin-user { display: flex; align-items: center; gap: 10px; padding: 11px 0;
  border-top: 1px solid var(--rule); }
.admin-user:first-child { border-top: 0; }
.admin-user .who { flex: 1; min-width: 0; }
.admin-user .who b { display: block; font-size: 13.5px; font-weight: 500; }
.admin-user .who span { font-family: var(--mono); font-size: 11px; color: var(--faint); }
.admin-user.is-muted { opacity: .6; }

@media (max-width: 860px) {
  .forum-switch { position: sticky; top: var(--topbar-h); z-index: 15;
    padding: 8px 0; margin: -8px 0 8px; background: var(--paper); }
  .post-card { padding: 12px; border-radius: var(--r-md); }
  .post-title { font-size: 15px; }
  .toolbar { flex-wrap: wrap; }
  .toolbar .chat-rooms { order: 3; width: 100%; }
  .admin-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ══════════ THÀNH PHẦN DÙNG LẠI ══════════ */
/* Thay cho các style nội tuyến rải rác trước đây: mỗi bố cục lặp lại đều có
   tên riêng, nên sửa một chỗ là đổi mọi nơi. */
.row-wrap { display: flex; align-items: center; gap: var(--s3); flex-wrap: wrap; }
.w-full { width: 100%; }
.mt-3 { margin-top: var(--s3); }
.mt-4 { margin-top: var(--s4); }

/* ô soạn tin dùng chung cho chat và bình luận */
.composer { display: flex; gap: var(--s2); align-items: flex-end; width: 100%; }
.composer textarea {
  flex: 1; min-height: 44px; height: 44px; max-height: 120px;
  padding: 11px var(--s3); resize: none; font-size: 15px; line-height: 1.4;
}
.composer .btn { flex: none; }

/* ── danh tính trên thanh trên cùng ── */
.me-chip {
  display: inline-flex; align-items: center; gap: var(--s2);
  height: 36px; padding: 3px 12px 3px 3px;
  border: 1px solid var(--rule); border-radius: 999px;
  background: var(--surface-2); cursor: pointer; max-width: 190px;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.me-chip:hover { background: var(--surface-3); border-color: var(--rule-2); }
.me-chip .ava { border-radius: 999px; }
.me-chip .me-name {
  font-size: 13px; font-weight: 500; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}

/* ══════════ THẺ HỒ SƠ ══════════ */
/* Bản trước để tên nằm cạnh ảnh đại diện, tức là đè lên ảnh bìa — chữ trắng
   trên một tấm ảnh bất kỳ thì đọc được hay không hoàn toàn do may rủi. Giờ chỉ
   ảnh đại diện tràn lên mép bìa, còn tên và mã sinh viên xuống hẳn phần nền
   đặc bên dưới, nơi tương phản luôn nằm trong tầm kiểm soát. */
/* Ảnh đại diện nằm trong dòng chảy bình thường và được kéo lên bằng lề âm, chứ
   không phải định vị tuyệt đối rồi chừa chỗ bằng một phép tính đệm. Lý do: với
   cách cũ, chiều cao ảnh bìa và vị trí ảnh đại diện là hai con số phải tự khớp
   nhau, mà chỉ cần một phép calc bị trình duyệt loại bỏ là tên rơi thẳng vào
   giữa ảnh đại diện. Ở đây tên luôn nằm sau ảnh đại diện vì dòng chảy quy định
   thế — hỏng lắm thì ảnh không đè lên bìa, chứ không bao giờ đè lên chữ.
   Ba biến dưới đây phải sửa cùng nhau, nên đặt sát nhau. */
.idcard {
  margin: 0 calc(var(--s4) * -1);
  --cover-h: 132px;
  --ava-h: 76px;
  --ava-pull: -38px;    /* bằng nửa --ava-h */
}
.idcard-cover {
  position: relative; height: var(--cover-h);
  background: var(--surface-3); background-size: cover; background-position: center;
}
.idcard-cover.is-empty { background-image: none; }

.idcard-body { padding: 0 var(--s4); }

.idcard-ava {
  position: relative;
  width: var(--ava-h); height: var(--ava-h);
  margin-top: var(--ava-pull);
}
.idcard-ava .ava {
  width: 100%; height: 100%; font-size: 24px;
  border: 4px solid var(--surface); border-radius: 24px;
}

.idcard-name { display: flex; align-items: center; gap: var(--s2); flex-wrap: wrap; margin-top: var(--s2); }
.idcard-name b { font-size: 18px; letter-spacing: -.01em; }
.idcard-code { font-family: var(--mono); font-size: 11.5px; color: var(--faint); margin-top: 2px; }

/* vùng bấm để đổi ảnh */
.pic-slot { position: relative; }
.pic-overlay {
  position: absolute; inset: 0; display: grid; place-items: center; gap: var(--s1);
  color: #fff; background: rgba(12, 16, 24, .5); cursor: pointer;
  opacity: 0; border: 0; padding: 0; width: 100%;
  transition: opacity var(--dur) var(--ease);
}
.pic-overlay span { font-size: 11.5px; font-weight: 500; }
.idcard-ava .pic-overlay { border-radius: 20px; inset: 4px; width: auto; }
.idcard-ava .pic-overlay span { display: none; }
.pic-slot:hover .pic-overlay, .pic-slot:focus-within .pic-overlay { opacity: 1; }

/* Máy cảm ứng không có hover, nên huy hiệu máy ảnh luôn hiện để biết bấm được. */
.pic-badge {
  position: absolute; right: var(--s2); bottom: var(--s2);
  width: 28px; height: 28px; border-radius: 50%;
  display: grid; place-items: center; pointer-events: none;
  background: rgba(12, 16, 24, .55); color: #fff;
}
.idcard-ava .pic-badge { right: -1px; bottom: -1px; width: 24px; height: 24px;
  border: 2px solid var(--surface); }
.pic-badge svg { width: 14px; height: 14px; }
.pic-clear {
  position: absolute; right: var(--s2); top: var(--s2);
  height: 26px; padding: 0 var(--s2); border: 0; border-radius: 999px;
  background: rgba(12, 16, 24, .55); color: #fff; font-size: 11.5px; cursor: pointer;
}
.idcard-ava .pic-clear { right: auto; left: -4px; top: -4px; height: 22px; padding: 0 6px; font-size: 10.5px; }
@media (hover: hover) { .pic-slot:not(:hover) .pic-clear { opacity: 0; } }
.pic-clear { transition: opacity var(--dur) var(--ease); }

/* ── các nhóm trường trong hồ sơ ── */
.field-block { padding: var(--s4) 0; border-top: 1px solid var(--rule); }
.field-block:first-of-type { border-top: 0; }
.field-block > .group-title { margin-bottom: var(--s2); }
.field-inline { display: flex; align-items: center; gap: var(--s3); }
.field-inline .field-text { flex: 1; min-width: 0; }
.field-inline .field-text b { display: block; font-size: 13.5px; font-weight: 500; }
.field-inline .field-text span { display: block; margin-top: 2px; font-size: 12px; color: var(--muted); }

/* ══════════ CỔNG VÀO DIỄN ĐÀN ══════════ */
.gate { max-width: 460px; margin: var(--s5) auto; padding: var(--s5); }
.gate-step { font-family: var(--mono); font-size: 10.5px; letter-spacing: .1em;
  text-transform: uppercase; color: var(--faint); }
.gate h2 { font-size: 20px; margin-top: var(--s1); }
.gate p { color: var(--muted); font-size: 13.5px; line-height: 1.55; margin-top: var(--s2); }
.gate-list { list-style: none; margin: var(--s4) 0 0; padding: 0; display: grid; gap: var(--s3); }
.gate-list li { display: flex; gap: var(--s3); font-size: 13px; color: var(--ink-2); line-height: 1.5; }
.gate-list svg { width: 18px; height: 18px; flex: none; margin-top: 1px; color: var(--accent); }
.gate-agree { display: flex; gap: var(--s3); align-items: flex-start; margin-top: var(--s4);
  padding: var(--s3); border: 1px solid var(--rule-2); border-radius: var(--r-md);
  background: var(--surface-2); cursor: pointer; }
.gate-agree input { width: 20px; height: 20px; flex: none; margin: 0; accent-color: var(--accent); }
.gate-agree span { font-size: 13px; line-height: 1.5; }
.gate-actions { display: flex; gap: var(--s2); margin-top: var(--s4); }
.gate-actions .btn { flex: 1; }
.gate-dots { display: flex; gap: 5px; justify-content: center; margin-top: var(--s4); }
.gate-dots i { width: 6px; height: 6px; border-radius: 50%; background: var(--rule-2); }
.gate-dots i.is-on { background: var(--accent); width: 18px; border-radius: 3px; }

@media (max-width: 860px) {
  .me-chip { max-width: 132px; padding-right: var(--s2); }
  /* Đổi biến chứ không đổi thẳng chiều cao: vị trí ảnh đại diện và khoảng đệm
     của phần tên đều tính từ hai biến này. Sửa một nơi mà quên nơi kia là ảnh
     đại diện đè lên tên — đúng lỗi của bản trước. */
  .idcard { --cover-h: 108px; --ava-h: 68px; --ava-pull: -34px; }
  .gate { margin: var(--s3) 0; padding: var(--s4); }
}

/* ══════════ CHỮ CÓ ĐỊNH DẠNG ══════════ */
.rich-line { min-height: 1px; }
.rich-line.is-blank { height: .55em; }
.rich-quote {
  margin: var(--s2) 0; padding: var(--s2) var(--s3);
  border-left: 3px solid var(--rule-2); border-radius: 0 var(--r-sm) var(--r-sm) 0;
  background: var(--surface-2); color: var(--muted);
}
.rich-code {
  font-family: var(--mono); font-size: .9em; padding: 1px 5px; border-radius: 5px;
  background: var(--surface-3); color: var(--ink-2);
}
.rich-link { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; overflow-wrap: anywhere; }

.mention {
  display: inline; padding: 1px 5px; margin: 0 1px; border: 0; border-radius: 5px;
  font: inherit; font-weight: 500; cursor: pointer;
  background: var(--accent-soft); color: var(--accent);
  transition: background-color var(--dur) var(--ease);
}
.mention:hover { background: var(--accent); color: var(--on-accent); }

/* ── ô gợi ý tên ── */
.mention-box {
  position: fixed; z-index: 300; max-height: 210px; overflow-y: auto;
  background: var(--surface); border: 1px solid var(--rule-2);
  border-radius: var(--r-md); box-shadow: var(--shadow-3); padding: var(--s1);
}
.mention-opt {
  display: flex; align-items: center; gap: var(--s2); width: 100%;
  padding: var(--s2); border: 0; border-radius: var(--r-sm); background: none;
  cursor: pointer; text-align: left; font-size: 13.5px;
}
.mention-opt.is-active, .mention-opt:hover { background: var(--surface-3); }

/* ══════════ THÔNG BÁO ══════════ */
.bell {
  position: relative; width: 36px; height: 36px; flex: none;
  display: grid; place-items: center; cursor: pointer;
  border: 1px solid var(--rule); border-radius: 999px;
  background: var(--surface-2); color: var(--ink-2);
  transition: background-color var(--dur) var(--ease);
}
.bell:hover { background: var(--surface-3); }
.bell-count {
  position: absolute; top: -3px; right: -3px; min-width: 17px; height: 17px; padding: 0 4px;
  display: grid; place-items: center; border-radius: 999px;
  background: var(--signal); color: #fff; font-size: 10.5px; font-weight: 600;
  border: 2px solid var(--surface);
}
.notif {
  display: flex; gap: var(--s3); width: 100%; padding: var(--s3) 0; text-align: left;
  background: none; border: 0; border-top: 1px solid var(--rule); cursor: pointer;
}
.notif:first-child { border-top: 0; }
.notif:hover { background: var(--surface-2); }
.notif.is-new { border-left: 3px solid var(--accent); padding-left: var(--s2); }
.notif-main { flex: 1; min-width: 0; }
.notif-head { display: flex; gap: 5px; flex-wrap: wrap; align-items: baseline; }
.notif-head b { font-size: 13.5px; font-weight: 600; }
.notif-head span { font-size: 13px; color: var(--muted); }
.notif-preview {
  font-size: 12.5px; color: var(--ink-2); margin-top: 2px;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.notif-when { font-family: var(--mono); font-size: 11px; color: var(--faint); margin-top: 3px; }

/* ── tiền tố bài viết ── */
.post-prefix {
  font-size: 10.5px; font-weight: 600; padding: 2px 7px; border-radius: 5px;
  background: var(--surface-3); color: var(--ink-2);
}

@media (max-width: 860px) {
  .bell { width: 34px; height: 34px; }
  .mention-box { max-height: 170px; }
}

/* ══════════ CẮT ẢNH ══════════ */
.crop-stage {
  position: relative; width: 100%; margin-top: var(--s3);
  border-radius: var(--r-md); overflow: hidden; background: var(--surface-3);
  cursor: grab; touch-action: none;   /* kéo ảnh, không cuộn trang */
  user-select: none;
}
.crop-stage:active { cursor: grabbing; }
.crop-canvas { display: block; width: 100%; height: 100%; }
/* Khung tròn cho ảnh đại diện: thấy đúng phần sẽ hiện ra sau này. */
.crop-stage.is-round::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  box-shadow: 0 0 0 9999px rgba(12, 16, 24, .55);
  border-radius: 22%;
  margin: 6%;
}
.crop-zoom { display: flex; align-items: center; gap: var(--s3); margin-top: var(--s3); }
.crop-zoom span { color: var(--muted); font-size: 17px; width: 14px; text-align: center; }
.crop-zoom input[type="range"] {
  flex: 1; height: 4px; padding: 0; border: 0; border-radius: 999px;
  background: var(--rule-2); appearance: none; -webkit-appearance: none;
}
.crop-zoom input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--surface); box-shadow: var(--shadow-1); cursor: pointer;
}
.crop-zoom input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--surface); cursor: pointer;
}