/* TutorTally shared interface system. */
:root {
  --muted: #63736d;
  --r-sm: 10px; --r-md: 14px; --r-lg: 20px; --r-xl: 28px;
  --ease: cubic-bezier(.2,.8,.2,1);
  --ring: 0 0 0 4px rgba(255,165,0,.19);
}
@media (prefers-color-scheme: dark) { :root { --muted: #a2b5ad; } }
html { color-scheme: light dark; scroll-padding-top: 110px; }
body { line-height: 1.5; font-feature-settings: "ss01"; }
button, input, select, textarea { font-family: inherit; }
button, a, input, select, textarea { -webkit-tap-highlight-color: transparent; }
h1, h2, h3, .header-title, .student-name { text-wrap: balance; }
h1, h2, h3 { letter-spacing: -.035em; }
button:focus-visible, a:focus-visible, [role="button"]:focus-visible,
input:focus-visible, select:focus-visible, textarea:focus-visible, [contenteditable]:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 3px; box-shadow: var(--ring);
}
button:disabled { cursor: not-allowed; opacity: .55; }
.btn, .action-btn, .add-btn, .list-btn, .refresh-btn, .header-settings-btn,
.global-tools-btn, .showmore, .papers-toggle { min-height: 44px; }
.btn, .action-btn { line-height: 1.35; }
input, textarea, select { accent-color: var(--accent-fill); }
.field label { color: var(--ink-dim); font-size: .8rem; text-transform: none; letter-spacing: 0; font-weight: 600; margin-bottom: 7px; }
.field input, .field select, .field textarea { min-height: 46px; }
.section-label, .tools-section-title { color: var(--ink-dim); letter-spacing: .075em; font-size: .7rem; }
.kpi b, .stmt-big, .rev-val, .pay-row, .lesson-status, .overview-value { font-variant-numeric: tabular-nums; }
.card, .panel { border-radius: var(--r-lg); }
.card, .panel, .tools-group { box-shadow: var(--sh-2); }
.pill { line-height: 1.4; }
.app-icon { width: 19px; height: 19px; flex: 0 0 auto; vertical-align: middle; }
.btn .app-icon, .action-btn .app-icon { width: 18px; height: 18px; }
.icon-label { display: inline-flex; align-items: center; gap: 8px; }
.action-btn { cursor: pointer; transition: background .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease); }
@media (hover:hover) {
  .action-btn:hover { background: var(--accent-light); border-color: var(--accent); transform: translateY(-1px); }
}
.action-btn:active { transform: scale(.985); }
.sheet { padding: 24px; border-radius: 24px 24px 0 0; padding-bottom: max(24px, env(safe-area-inset-bottom)); overscroll-behavior: contain; }
.sheet h2 { font-size: 1.22rem; letter-spacing: -.03em; }
.sheet .btn-row { padding-top: 8px; }
.tools-row { min-height: 72px; gap: 12px; padding: 15px; }
.tools-row-main { flex: 1; }
.tools-row-sub { font-size: .8rem; line-height: 1.5; }
.tools-icon { width: 38px; height: 38px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 12px; background: var(--accent-light); color: var(--accent); }
.tools-row.danger .tools-icon { background: var(--warn-light); color: var(--warn); }
.tools-chevron { display: inline-flex; }
.toast-in { line-height: 1.4; }
.empty, .state { line-height: 1.6; }
@keyframes tt-enter { from { opacity:0; transform:translateY(7px); } to { opacity:1; transform:none; } }
@keyframes tt-confirm { 0% { transform:scale(.8); } 70% { transform:scale(1.12); } 100% { transform:scale(1); } }
.copy-confirmed .app-icon { animation: tt-confirm .24s var(--ease); }
.copy-status { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.copy-fallback { grid-column: 1 / -1; padding: 12px; border: 1px solid var(--warn); border-radius: 12px; background: var(--warn-light); color: var(--warn); font-size: .82rem; }
.copy-fallback input { display:block; width:100%; margin-top:7px; padding:10px; background:var(--card); border:1px solid var(--line); border-radius:8px; color:var(--ink); font:inherit; }
@media (min-width: 760px) {
  .overlay { align-items: center; padding: 28px; }
  .sheet { border-radius: 24px; max-height: min(88vh, 900px); max-width: 680px; box-shadow: var(--sh-3); }
}
@media (max-width: 480px) {
  .sheet { padding: 22px 18px max(22px, env(safe-area-inset-bottom)); }
  .field input, .field select, .field textarea, .note-editor { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

.sheet-close { float:right; position:sticky; top:0; z-index:3; display:grid; place-items:center; width:36px; height:36px; margin:-6px -6px 6px 12px; border:1px solid var(--line); border-radius:12px; background:var(--card-2); color:var(--ink); cursor:pointer; }
.sheet-close:hover { background:var(--accent-light); }
.cand-disclosure summary { cursor:pointer; list-style:none; min-height:28px; margin:0; }
.cand-disclosure summary::-webkit-details-marker { display:none; }
.cand-disclosure summary > .app-icon:last-child { margin-left:auto; width:15px; transition:transform .18s var(--ease); }
.cand-disclosure[open] summary { padding-bottom:12px; }
.cand-disclosure[open] summary > .app-icon:last-child { transform:rotate(90deg); }
@media (min-width:760px) { .global-tools-btn { display:none; } }