/* ==========================================================================
   pages.css — trang Hồ sơ (profile.html) và Bảng xếp hạng (leaderboard.html).
   Dùng token trong base.css; header dùng lại .lib-header của hub.css.
   ========================================================================== */

.page { max-width: 1040px; padding-top: 28px; padding-bottom: 64px; }
.page-title { margin-bottom: 18px; }
.page-title h1 { margin-bottom: 4px; }
.page-title p { margin: 0; }
.page-h { margin: 34px 0 14px; font-size: 1.15rem; }
.small { font-size: 0.85rem; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.tools { display: flex; gap: 8px; }

/* Liên kết điều hướng trong header (cả trang chủ) */
.site-nav { display: flex; gap: 4px; margin-left: 12px; }
.site-nav a {
  text-decoration: none; color: var(--muted); font-weight: 600; font-size: 0.92rem; white-space: nowrap;
  padding: 7px 13px; border-radius: 10px; transition: background 0.12s, color 0.12s;
}
.site-nav a:hover { color: var(--text); background: var(--surface-2); }
.site-nav a[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
@media (max-width: 720px) {
  .site-nav { margin-left: 0; }
  .site-nav a { padding: 6px 9px; font-size: 0.86rem; }
  .lib-header .home .course-name { display: none; }
}

/* ---------- Hồ sơ ---------- */
.profile-hero { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; padding: 26px;
  background: radial-gradient(600px 220px at 0% 0%, var(--glow), transparent 70%), var(--surface); }
.avatar { width: 88px; height: 88px; border-radius: 26px; display: grid; place-items: center; font-size: 3rem; flex: none;
  background: linear-gradient(145deg, var(--accent-soft), var(--surface-2)); border: 1px solid var(--border); box-shadow: var(--shadow); }
.profile-hero .who { flex: 1; min-width: 220px; }
.profile-hero h1 { margin: 0 0 8px; overflow-wrap: anywhere; }
.chips-row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 6px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.notice { margin-top: 14px; padding: 12px 16px; border-radius: var(--radius-sm); background: var(--warn-soft); color: var(--warn);
  display: flex; gap: 12px; align-items: center; justify-content: space-between; flex-wrap: wrap; font-size: 0.92rem; }

.tiles { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); margin-top: 16px; }
.tile { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px 18px;
  display: grid; gap: 2px; }
.tile .ti { font-size: 1.3rem; }
.tile b { font-family: var(--mono); font-size: 1.7rem; letter-spacing: -0.02em; line-height: 1.2; }
.tile span { color: var(--muted); font-size: 0.85rem; }

.ach-sum { margin: -6px 0 12px; font-size: 0.88rem; }
.ach-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }
.ach { display: flex; gap: 14px; align-items: center; padding: 14px 16px; border-radius: var(--radius); background: var(--surface); border: 1px dashed var(--border); }
.ach .ai { width: 48px; height: 48px; flex: none; display: grid; place-items: center; font-size: 1.5rem; border-radius: 14px; background: var(--surface-2); filter: grayscale(1); opacity: 0.7; }
.ach .at { min-width: 0; flex: 1; display: grid; gap: 2px; }
.ach small { color: var(--muted); font-size: 0.8rem; line-height: 1.4; }
.ach .ap { display: flex; align-items: center; gap: 8px; margin-top: 4px; }
.ach .ap .meter { flex: 1; }
.ach .ap span { font-family: var(--mono); font-size: 0.72rem; color: var(--muted); }
.ach.done { border-style: solid; border-color: color-mix(in srgb, var(--warn) 45%, var(--border)); box-shadow: var(--shadow);
  background: linear-gradient(135deg, var(--warn-soft), var(--surface) 70%); }
.ach.done .ai { filter: none; opacity: 1; background: var(--surface); box-shadow: 0 0 0 2px color-mix(in srgb, var(--warn) 40%, transparent); }

.topic-progress { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.tp { display: grid; gap: 8px; padding: 16px 18px; }
.tp .lbl { font-family: var(--mono); font-size: 0.7rem; font-weight: 700; color: var(--accent); text-transform: uppercase; letter-spacing: 0.08em; }
.tp b { line-height: 1.35; }

.results-list { padding: 6px 0; }
.game-row { display: grid; grid-template-columns: 44px minmax(0, 1fr) minmax(90px, 160px) 70px; gap: 14px; align-items: center;
  padding: 11px 20px; text-decoration: none; color: inherit; transition: background 0.12s; }
.game-row + .game-row { border-top: 1px solid var(--border); }
.game-row:hover { background: var(--surface-2); }
.game-row .ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; font-size: 1.4rem; background: var(--accent-soft); }
.game-row .gi { display: grid; min-width: 0; }
.game-row .gi b, .game-row .gi small { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.game-row .gp { display: grid; gap: 4px; }
.game-row .gp small { color: var(--muted); font-size: 0.75rem; }
.game-row .gs { font-family: var(--mono); font-weight: 700; text-align: right; color: var(--accent); }
.empty-inline { text-align: center; padding: 40px 16px; display: grid; gap: 10px; justify-items: center; }
.empty-inline p { margin: 0; }
.empty-inline .big { font-size: 2.4rem; }
@media (max-width: 600px) {
  .game-row { grid-template-columns: 40px minmax(0, 1fr) 60px; padding: 10px 14px; }
  .game-row .gp { display: none; }
}

/* Hộp thoại sửa hồ sơ */
.field { display: grid; gap: 6px; font-weight: 600; font-size: 0.9rem; }
.avatar-pick { display: grid; grid-template-columns: repeat(8, 1fr); gap: 6px; }
.avatar-pick .av { aspect-ratio: 1; font-size: 1.35rem; border-radius: 12px; border: 1px solid var(--border); background: var(--bg); cursor: pointer; padding: 0; }
.avatar-pick .av:hover { border-color: var(--accent); }
.avatar-pick .av.on { border-color: var(--accent); background: var(--accent-soft); box-shadow: 0 0 0 2px var(--accent); }
#edit-dlg { width: min(440px, calc(100vw - 32px)); }

/* ---------- Bảng xếp hạng ---------- */
.me-card { display: flex; align-items: center; gap: 14px; padding: 14px 18px; margin-bottom: 16px; flex-wrap: wrap;
  background: linear-gradient(135deg, var(--accent-soft), var(--surface) 70%); }
.me-ic { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; font-size: 1.5rem; background: var(--surface); border: 1px solid var(--border); flex: none; }
.me-t { flex: 1; min-width: 180px; display: grid; }

.board-toolbar { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.seg { display: inline-flex; padding: 4px; gap: 2px; border-radius: 14px; background: var(--surface-2); border: 1px solid var(--border); max-width: 100%; overflow-x: auto; }
.seg-btn { font: inherit; font-weight: 600; font-size: 0.9rem; border: 0; background: transparent; color: var(--muted); padding: 7px 14px; border-radius: 10px; cursor: pointer; white-space: nowrap; }
.seg-btn:hover:not(:disabled) { color: var(--text); }
.seg-btn[aria-selected="true"] { background: var(--surface); color: var(--accent); box-shadow: var(--shadow); }
.seg-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.select-wrap { flex: 1; min-width: 180px; max-width: 320px; margin-left: auto; }
.select-wrap select { width: 100%; font: inherit; font-size: 0.92rem; color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 9px 12px; }
.select-wrap select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.board { padding: 6px 0; overflow-x: auto; }
.lb-row { display: grid; grid-template-columns: 52px minmax(0, 1fr) repeat(var(--cols, 5), 112px); gap: 10px; align-items: center; padding: 11px 20px; min-width: 700px; }
.lb-row + .lb-row { border-top: 1px solid var(--border); }
.lb-head { font-family: var(--mono); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); font-weight: 700; padding-top: 8px; padding-bottom: 8px; }
.lb-row .rk { text-align: center; font-family: var(--mono); font-weight: 700; color: var(--muted); font-size: 1rem; }
.lb-row.top .rk { font-size: 1.35rem; }
.lb-row .pl { display: flex; align-items: center; gap: 10px; min-width: 0; }
.lb-row .nm { font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.av-sm { width: 36px; height: 36px; border-radius: 11px; display: grid; place-items: center; flex: none; font-size: 1.15rem; background: var(--surface-2); border: 1px solid var(--border); }
.lb-row .num { text-align: right; font-family: var(--mono); font-size: 0.9rem; color: var(--muted); white-space: nowrap; }
.lb-row .num.sorted { color: var(--text); font-weight: 700; font-size: 1rem; }
.lb-head .num.sorted { color: var(--accent); }
.lb-row.top1 { background: linear-gradient(90deg, var(--warn-soft), transparent 60%); }
.lb-row.you { background: var(--accent-soft); box-shadow: inset 3px 0 0 var(--accent); }
.foot-note { margin-top: 12px; font-size: 0.85rem; }
@media (max-width: 720px) {
  .lb-row { grid-template-columns: 40px minmax(0, 1fr) repeat(3, 64px); padding: 10px 12px; min-width: 0; gap: 8px; }
  .lb-row .hide-sm { display: none; }
  .select-wrap { max-width: none; margin-left: 0; }
}
.skeleton { display: grid; gap: 1px; padding: 6px 0; }
.sk-row { height: 56px; margin: 4px 20px; border-radius: 12px; background: linear-gradient(90deg, var(--surface-2), var(--surface), var(--surface-2)); background-size: 200% 100%; animation: sk 1.4s linear infinite; }
@keyframes sk { to { background-position: -200% 0; } }

/* Header trên màn hình hẹp: logo không bị ép, các nút gọn lại */
.lib-header .home { flex: none; }
@media (max-width: 720px) {
  .lib-header .inner { gap: 6px; flex-wrap: wrap; padding-top: 8px; padding-bottom: 6px; }
  .lib-header #nav, .lib-header #lib-nav { order: 3; width: 100%; }
  .lib-header .site-nav { margin: 0; }
  .lib-header .site-nav a { flex: 1; text-align: center; }
  .tools { gap: 6px; }
  .tools .sync-btn { padding: 0 8px; font-size: 0.75rem; width: auto; flex: none; }
  .tools .icon-btn { width: 34px; height: 34px; }
}

/* Trang chỉ dành cho Online, khi đang offline */
.gate { max-width: 520px; margin: 8vh auto 0; text-align: center; display: grid; gap: 6px; justify-items: center; padding: 36px 28px; }
.gate .big { font-size: 2.6rem; }
.gate h1 { margin-bottom: 0; }
.gate .row { justify-content: center; margin-top: 12px; }

/* ===== Lớp học ===== */
.join-box { padding: 16px 18px; margin-bottom: 14px; }
.join-form { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.join-form .field { flex: 1; min-width: 200px; }
.join-box input, .share-dlg input { font: inherit; padding: 10px 12px; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.join-box input:focus, .share-dlg input:focus { outline: none; border-color: var(--accent); }
#join-code { font-family: var(--mono); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.join-box .auth-msg:empty { display: none; }
.class-list { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.class-card { display: grid; gap: 12px; padding: 16px 18px; align-content: start; }
.cc-head { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.cc-head b { flex: 1 1 100%; line-height: 1.35; overflow-wrap: anywhere; }
.cc-code { display: flex; align-items: center; gap: 10px; }
.cc-code code { font-family: var(--mono); font-weight: 700; font-size: 1.25rem; letter-spacing: 0.14em; }
.class-card .row { flex-wrap: wrap; gap: 8px; }
.share-dlg { text-align: center; }
.share-dlg input { width: 100%; font-size: 0.8rem; text-align: center; }
.qr-box { display: grid; place-items: center; margin: 4px auto 8px; padding: 12px; background: #fff; border-radius: 16px; width: fit-content; min-height: 120px; color: #333; }
.qr-box svg { display: block; max-width: 100%; height: auto; }
.code-big { font-family: var(--mono); font-weight: 800; font-size: 2rem; letter-spacing: 0.2em; margin: 4px 0 10px; }
.select-wrap.grow { margin-left: 0; max-width: 360px; }
.lb-gap { text-align: center; padding: 2px 0; border-top: 1px solid var(--border); letter-spacing: 0.3em; }
.lb-row .rm { margin-left: auto; width: 28px; height: 28px; font-size: 0.8rem; opacity: 0.5; }
.lb-row .rm:hover { opacity: 1; }