/* Brand tokens follow the song-piano-brand repo: gold #B28A38 for lines and fills only; darker gold for text. */
:root {
  --ink: #211c18; --ink-2: #57504a; --ink-3: #6f675f;
  --canvas: #f4f1ea; --paper: #ffffff; --line: #e7e1d6; --line-2: #d8d0c2;
  --gold: #b28a38; --gold-ink: #6e5022; --gold-wash: #f5ecdc;
  --alert: #b3261e; --alert-ink: #8c1d18; --alert-wash: #fbeceb;
  --radius: 12px;
  --tint-0: #f3e6c8; --ink-0: #5f4414;
  --tint-1: #dbe8f5; --ink-1: #1f4d7a;
  --tint-2: #e0efdf; --ink-2c: #2f5a2c;
  --tint-3: #f5e0e6; --ink-3c: #7a2e46;
  --tint-4: #e6e1f4; --ink-4: #45397a;
  --tint-5: #dff0ee; --ink-5: #1f5953;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", "Apple SD Gothic Neo", sans-serif;
  color: var(--ink); background: var(--canvas);
  -webkit-text-size-adjust: 100%;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--canvas); }
button, input, textarea, select { font: inherit; color: inherit; }
button { cursor: pointer; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.shell { max-width: 1120px; margin: auto; padding: 28px 24px 80px; }
.topbar { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; }
.logo { display: block; width: auto; height: 60px; margin: -8px 0 0 -14px; }
.eyebrow { margin: 0 0 4px; color: var(--gold-ink); font-size: 12px; font-weight: 600; letter-spacing: .14em; text-transform: uppercase; }
h1 { margin: 0; font-size: 32px; font-weight: 700; letter-spacing: -.02em; }
h2 { margin: 0; }
.top-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.top-actions label { color: var(--ink-3); font-size: 13px; }
#language { width: auto; min-width: 104px; min-height: 36px; padding: 6px 10px; }
.top-actions button { min-height: 36px; padding: 6px 12px; font-size: 14px; }
.menu { position: relative; }
.menu summary { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 10px; color: var(--ink-2); list-style: none; cursor: pointer; transition: background-color .15s; }
.menu summary::-webkit-details-marker { display: none; }
.menu summary:hover, .menu[open] summary { background: #e9e4da; color: var(--ink); }
.menu-panel { position: absolute; top: calc(100% + 6px); right: 0; z-index: 30; display: grid; min-width: 220px; padding: 6px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); box-shadow: 0 1px 2px rgb(40 30 10 / .06), 0 12px 28px rgb(40 30 10 / .12); transform-origin: top right; }
.menu[open] .menu-panel { animation: menu-in .14s ease-out; }
@keyframes menu-in { from { opacity: 0; transform: translateY(-4px) scale(.98); } }
@media (prefers-reduced-motion: reduce) { .menu[open] .menu-panel { animation: none; } }
.menu-lang { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 4px 4px 8px 10px; margin-bottom: 4px; border-bottom: 1px solid var(--line); }
.menu-lang label { color: var(--ink-3); font-size: 13px; }
.menu-panel #language { width: auto; min-width: 0; min-height: 44px; padding: 4px 8px; border: 0; border-radius: 8px; background: #f1ede5; font-size: 14px; }
.menu-panel button { width: 100%; min-height: 44px; padding: 8px 10px; border: 0; border-radius: 8px; background: none; font-size: 15px; font-weight: 500; text-align: left; }
.menu-panel button:hover { background: var(--canvas); }
.menu-panel button[hidden] { display: none; }
.menu-panel #account-action { margin-top: 4px; border-top: 1px solid var(--line); border-radius: 0 0 8px 8px; color: var(--ink-3); }
.demo-badge { padding: 6px 10px; border-radius: 999px; color: var(--gold-ink); background: var(--gold-wash); font-size: 12px; font-weight: 600; white-space: nowrap; }
.notice { margin: 18px 0; padding: 12px 14px; border-radius: var(--radius); background: var(--gold-wash); color: #5a4420; font-size: 14px; line-height: 1.5; }
.notice.alert { background: var(--alert-wash); color: var(--alert-ink); }

input, textarea, select { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--paper); }
input[type="search"] { border: 0; background: #e9e4da; border-radius: 10px; }
input:focus-visible, textarea:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid var(--gold); outline-offset: 2px; }
input[aria-invalid="true"] { border-color: var(--alert); }
textarea { resize: vertical; }
button { min-height: 44px; padding: 9px 16px; border: 1px solid var(--line-2); border-radius: 10px; background: var(--paper); font-weight: 600; }
button:hover { background: #faf7f1; }
button:disabled { opacity: .55; cursor: default; }
button.primary { border-color: var(--ink); background: var(--ink); color: #fff; }
button.primary:hover { background: #3a332d; }
button.danger { color: var(--alert-ink); border-color: #e6b8b4; }
button.danger:hover { background: var(--alert-wash); }
.text-button { min-height: 36px; padding: 6px 4px; border: 0; background: none; color: var(--gold-ink); font-weight: 600; }
.text-button:hover { background: none; text-decoration: underline; }
.text-button[aria-pressed="true"] { color: var(--ink); text-decoration: underline; text-underline-offset: 4px; }

.content { display: grid; grid-template-columns: minmax(280px, 360px) minmax(0, 1fr); gap: 24px; align-items: start; margin-top: 8px; }

/* List */
.list-panel { position: sticky; top: 16px; }
.list-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.list-head h2 { font-size: 22px; font-weight: 700; }
.add-student { display: inline-flex; align-items: center; gap: 6px; min-height: 38px; padding: 6px 14px; border: 0; border-radius: 999px; background: var(--ink); color: #fff; }
.add-student:hover { background: #3a332d; }
.add-student span:first-child { font-size: 20px; line-height: 1; font-weight: 500; }
.search-area { margin-bottom: 12px; }
.tiles { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 12px; }
.tile { display: grid; grid-template-columns: 1fr auto; grid-template-rows: auto auto; align-items: end; gap: 6px 8px; min-height: 76px; padding: 12px; border: 2px solid transparent; border-radius: var(--radius); background: var(--paper); text-align: left; }
.tile:hover { background: var(--paper); border-color: var(--line-2); }
.tile[aria-pressed="true"] { border-color: var(--gold); }
.tile-dot { grid-column: 1; width: 26px; height: 26px; border-radius: 50%; }
.tile-dot.active { background: var(--gold); }
.tile-dot.review { background: var(--alert); }
.tile-label { grid-column: 1; grid-row: 2; color: var(--ink-2); font-size: 14px; font-weight: 600; }
.tile-count { grid-column: 2; grid-row: 1 / 3; align-self: start; font-size: 26px; font-weight: 700; }
.filter-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.filter-chip { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; padding: 4px 6px 4px 14px; border: 1px solid var(--line-2); border-radius: 999px; background: transparent; color: var(--ink-2); font-size: 14px; font-weight: 600; }
.filter-chip:hover { background: var(--paper); }
.filter-chip[aria-pressed="true"] { border-color: var(--gold); background: var(--gold-wash); color: var(--gold-ink); }
.chip-count { min-width: 24px; padding: 2px 8px; border-radius: 999px; background: #ebe6dc; color: var(--ink-2); font-size: 12px; font-variant-numeric: tabular-nums; text-align: center; }
.filter-chip[aria-pressed="true"] .chip-count { background: var(--paper); color: var(--gold-ink); }
.list-controls { display: flex; align-items: center; justify-content: space-between; gap: 8px; margin-bottom: 8px; }
.segmented { display: inline-flex; flex: none; padding: 2px; border-radius: 10px; background: #e9e4da; }
.segmented button { min-height: 44px; padding: 4px 12px; white-space: nowrap; border: 0; border-radius: 8px; background: transparent; color: var(--ink-2); font-size: 14px; }
.segmented button[aria-pressed="true"] { background: var(--paper); color: var(--ink); box-shadow: 0 1px 2px rgb(33 28 24 / .12); }
.result-count { margin: 0 4px; color: var(--ink-3); font-size: 13px; }
.list-group + .list-group { margin-top: 14px; }
.group-title.letter { position: sticky; top: 0; z-index: 1; margin: 0; padding: 4px 14px; background: var(--canvas); color: var(--gold-ink); font-weight: 700; }
.group-title { margin: 0 14px 6px; color: var(--ink-3); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.rows { margin: 0; padding: 0; list-style: none; border-radius: var(--radius); background: var(--paper); overflow: hidden; }
.rows li + li .student-row { border-top: 1px solid var(--line); }
.student-row { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 60px; padding: 9px 14px; border: 0; border-radius: 0; background: var(--paper); text-align: left; font-weight: 400; }
.student-row:hover { background: #faf7f1; }
.student-row.selected { background: var(--gold-wash); box-shadow: inset 3px 0 0 var(--gold); }
.row-text { display: grid; flex: 1; min-width: 0; }
.row-name { font-weight: 600; }
.row-sub { overflow: hidden; color: var(--ink-3); font-size: 13px; text-overflow: ellipsis; white-space: nowrap; }
.review-dot { flex: none; width: 10px; height: 10px; border-radius: 50%; background: var(--alert); }
.empty { padding: 28px 12px; color: var(--ink-3); line-height: 1.5; text-align: center; }

.avatar { display: inline-grid; flex: none; place-items: center; width: 36px; height: 36px; border-radius: 50%; background: #ece7de; color: var(--ink-2); font-size: 13px; font-weight: 600; }
.avatar-lg { width: 68px; height: 68px; font-size: 22px; }
.avatar[data-color="0"] { background: var(--tint-0); color: var(--ink-0); }
.avatar[data-color="1"] { background: var(--tint-1); color: var(--ink-1); }
.avatar[data-color="2"] { background: var(--tint-2); color: var(--ink-2c); }
.avatar[data-color="3"] { background: var(--tint-3); color: var(--ink-3c); }
.avatar[data-color="4"] { background: var(--tint-4); color: var(--ink-4); }
.avatar[data-color="5"] { background: var(--tint-5); color: var(--ink-5); }

/* Detail */
.detail-panel { min-height: 320px; }
@media (min-width: 701px) {
  .detail-panel { position: sticky; top: 16px; max-height: calc(100vh - 32px); overflow-y: auto; }
}
.detail-panel > .empty { padding: 80px 12px; }
.detail-bar { display: flex; align-items: center; justify-content: flex-end; min-height: 36px; }
.back { display: none; min-height: 36px; margin-right: auto; padding: 6px 2px; border: 0; background: none; color: var(--gold-ink); font-weight: 600; }
.back:hover { background: none; }
.hero { padding: 0 12px 18px; text-align: center; }
.hero h2 { margin-top: 10px; font-size: 26px; font-weight: 700; letter-spacing: -.01em; }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; margin-top: 10px; }
.chip { padding: 4px 10px; border-radius: 999px; background: #ece7de; color: var(--ink-2); font-size: 13px; font-weight: 600; }
.chip.gold { background: var(--gold-wash); color: var(--gold-ink); }
.chip.alert { background: var(--alert-wash); color: var(--alert-ink); }
.quick { display: grid; grid-template-columns: repeat(auto-fit, minmax(0, 1fr)); gap: 8px; margin-bottom: 18px; }
.quick:has(+ .quick-to) { margin-bottom: 6px; }
.quick-to { margin: 0 0 18px; text-align: center; font-size: 13px; color: var(--ink-3); }
.quick-action { display: grid; place-items: center; min-height: 52px; border-radius: var(--radius); background: var(--paper); color: var(--gold-ink); font-weight: 600; text-decoration: none; }
.quick-action:hover { background: var(--gold-wash); }
.group { margin-bottom: 18px; }
.group-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 36px; padding: 0 14px 4px; }
.group-head h3, .past-group summary { margin: 0; color: var(--ink-3); font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; }
.group-body { border-radius: var(--radius); background: var(--paper); overflow: hidden; }
.group-body > * + * { border-top: 1px solid var(--line); }
.group-empty { margin: 0; padding: 14px; color: var(--ink-3); }
.past-group summary { display: flex; align-items: center; min-height: 36px; padding: 0 14px 4px; cursor: pointer; }
.past-group summary::marker { color: var(--ink-3); }
.kv { display: grid; grid-template-columns: minmax(96px, 150px) minmax(0, 1fr) auto; align-items: center; gap: 4px 12px; min-height: 50px; padding: 8px 14px; }
.kv-label { color: var(--ink-3); font-size: 13px; }
.kv-value { overflow-wrap: anywhere; font-weight: 500; }
.kv-value.missing { color: var(--ink-3); font-weight: 400; }
.kv-value a { color: var(--ink); text-decoration: none; }
.copy { min-height: 36px; padding: 4px 8px; border: 0; background: none; color: var(--gold-ink); font-size: 14px; }
.copy:hover { background: var(--gold-wash); }
.piece { display: flex; align-items: center; gap: 12px; min-height: 58px; padding: 8px 10px 8px 12px; }
.check { position: relative; flex: none; width: 44px; height: 44px; min-height: 0; margin: -4px 0; padding: 0; border: 0; border-radius: 50%; background: none; }
.check::before { content: ""; position: absolute; inset: 10px; border: 2px solid var(--gold); border-radius: 50%; }
.check:hover { background: var(--gold-wash); }
.past .check::before { background: var(--gold); }
.past .check::after { content: ""; position: absolute; left: 18px; top: 15px; width: 6px; height: 11px; border: solid #fff; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.piece-text { display: grid; flex: 1; min-width: 0; }
.piece-title { font-weight: 600; }
.past .piece-title { color: var(--ink-2); font-weight: 500; }
.piece-meta, .piece-note { color: var(--ink-3); font-size: 13px; }
.row-action { min-height: 36px; padding: 4px 8px; border: 0; background: none; color: var(--gold-ink); font-size: 14px; }
.row-action:hover { background: var(--gold-wash); }
.sibling { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 52px; padding: 8px 14px; border: 0; border-radius: 0; background: var(--paper); text-align: left; font-weight: 500; }
.sibling .avatar { width: 30px; height: 30px; font-size: 12px; }
.sibling span:nth-child(2) { flex: 1; }
.chevron { color: var(--gold-ink); font-size: 20px; }
.manage { display: flex; flex-wrap: wrap; gap: 8px; padding: 12px 14px; }
.status { margin: 0 0 14px; color: #2d6a4f; text-align: center; }

/* Forms */
.detail-panel > h2 { margin: 6px 0 16px; font-size: 22px; }
form { padding: 18px; border-radius: var(--radius); background: var(--paper); }
form .status { text-align: left; margin-top: 14px; }
.form-grid { display: grid; gap: 14px; }
.form-grid[hidden] { display: none; }
.form-grid label { display: grid; gap: 6px; font-weight: 600; }
.form-grid small { color: var(--alert-ink); font-weight: 400; }
.review-field { display: flex !important; align-items: center; gap: 8px; margin: 2px 0 8px; }
.review-field input { width: 22px; min-height: 22px; accent-color: var(--ink); }
.muted { color: var(--ink-3); }
.form-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.import-file-row { display: flex; align-items: end; gap: 8px; min-width: 0; }
.import-file-row label { flex: 1; min-width: 0; }
.import-file-row input { width: 100%; min-width: 0; }
.import-file-row small { overflow-wrap: anywhere; }
.import-conflicts { margin: 0 14px 18px; padding-left: 20px; }
#import-apply { margin: 0 14px 18px; }

.toast { position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); z-index: 20; display: flex; align-items: center; gap: 12px; max-width: calc(100% - 32px); padding: 10px 10px 10px 16px; border-radius: 14px; background: var(--ink); color: #fff; font-size: 14px; transform: translateX(-50%); box-shadow: 0 8px 24px rgb(33 28 24 / .22); }
.toast[hidden] { display: none; }
.toast button { min-height: 36px; padding: 4px 12px; border: 0; background: rgb(255 255 255 / .14); color: #fff; }
.toast button:hover { background: rgb(255 255 255 / .24); }

@media (max-width: 700px) {
  .shell { padding: 16px 16px 96px; }
  .topbar { align-items: center; gap: 10px; }
  .top-actions { flex-wrap: nowrap; }
  .top-actions .demo-badge { display: none; }
  .topbar > div:first-child { flex: 1; min-width: 0; }
  .topbar .logo { max-width: 100%; height: auto; max-height: 52px; }
  .top-actions > button { white-space: nowrap; }
  .logo { height: 52px; margin: -6px 0 -6px -12px; }
  .content { display: block; }
  .list-panel { position: static; }
  body[data-view="detail"] .list-panel, body[data-view="detail"] .topbar, body[data-view="detail"] .notice:not(.alert) { display: none; }
  body[data-view="list"] .detail-panel { display: none; }
  .list-head h2 { font-size: 30px; }
  .add-student { position: fixed; right: 18px; bottom: calc(22px + env(safe-area-inset-bottom)); z-index: 10; width: 56px; height: 56px; padding: 0; justify-content: center; box-shadow: 0 6px 18px rgb(33 28 24 / .25); }
  .add-student span:first-child { font-size: 28px; }
  #add-student-label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  body[data-view="detail"] .add-student { display: none; }
  .back { display: inline-flex; align-items: center; }
  .detail-bar { justify-content: space-between; }
  .kv { grid-template-columns: minmax(0, 1fr) auto; }
  .kv-label { grid-column: 1 / -1; }
  .toast { bottom: calc(92px + env(safe-area-inset-bottom)); }
}
@media (prefers-reduced-motion: no-preference) {
  .student-row, .tile, .check, .quick-action { transition: background-color .15s ease, border-color .15s ease; }
}

body[data-auth="required"] .content, body[data-auth="required"] #demo-badge { display: none; }

/* A–Z rail */
#student-list { display: flex; gap: 4px; align-items: flex-start; }
.list-sections { flex: 1; min-width: 0; }
.list-group + .list-group:has(.letter) { margin-top: 6px; }
.az-rail { position: sticky; top: 16px; display: flex; flex-direction: column; align-items: center; width: 22px; }
.az { min-height: 0; width: 22px; padding: 2px 0; border: 0; border-radius: 4px; background: none; color: var(--gold-ink); font-size: 10.5px; font-weight: 700; line-height: 1.25; }
.az:hover { background: var(--gold-wash); }
.az:disabled { color: var(--line-2); opacity: 1; }

/* Index card */
.card-tabs { display: flex; align-items: flex-end; gap: 6px; padding-left: 16px; overflow-x: auto; scrollbar-width: none; }
.card-tabs::-webkit-scrollbar { display: none; }
.card-tab { flex: none; min-height: 0; padding: 6px 14px 5px; border: 1px solid var(--line-2); border-bottom: 0; border-radius: 10px 10px 0 0; background: #efe9dd; color: var(--ink-3); font-size: 12px; font-weight: 600; }
.card-tab:hover { background: var(--gold-wash); color: var(--gold-ink); }
.card-tab.own { padding: 7px 16px 6px; font-size: 13px; font-weight: 700; letter-spacing: .02em; }
.card { margin-bottom: 24px; padding: 18px 16px 6px; border: 1px solid var(--line-2); border-radius: 0 16px 16px 16px; background: var(--paper);
  box-shadow: 0 1px 0 var(--line), 0 14px 30px -22px rgb(33 28 24 / .45); }
.card .hero { margin: 0 -16px 16px; padding: 0 16px 16px; border-bottom: 2px solid var(--card-tint, var(--gold-wash)); }
.card .quick-action { border: 1px solid var(--line); }
.card .group-body { border-radius: 0; background: transparent; }
.card .group-body > * + * { border-top-color: #e3e7ee; }
.card .group-head, .card .past-group summary { padding-left: 2px; }
.card .kv, .card .piece { padding-left: 2px; padding-right: 2px; }
.card-tab[data-color="0"], .card[data-color="0"] { --card-tint: var(--tint-0); --card-ink: var(--ink-0); }
.card-tab[data-color="1"], .card[data-color="1"] { --card-tint: var(--tint-1); --card-ink: var(--ink-1); }
.card-tab[data-color="2"], .card[data-color="2"] { --card-tint: var(--tint-2); --card-ink: var(--ink-2c); }
.card-tab[data-color="3"], .card[data-color="3"] { --card-tint: var(--tint-3); --card-ink: var(--ink-3c); }
.card-tab[data-color="4"], .card[data-color="4"] { --card-tint: var(--tint-4); --card-ink: var(--ink-4); }
.card-tab[data-color="5"], .card[data-color="5"] { --card-tint: var(--tint-5); --card-ink: var(--ink-5); }
.card-tab.own { background: var(--card-tint, var(--gold-wash)); color: var(--card-ink, var(--gold-ink)); }