/* ---------- Header (glassmorphism chỉ dùng ở đây — A5.1) ---------- */
.header-glass {
  position: sticky; top: 0; z-index: 50;
  background: light-dark(rgba(255, 255, 255, 0.82), rgba(10, 19, 28, 0.82));
  -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border-bottom: 1px solid light-dark(rgba(0, 71, 128, 0.08), rgba(126, 177, 214, 0.14));
}
.header-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 24px; min-height: 68px; padding-block: 8px; }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--color-text-primary); text-decoration: none; min-height: var(--touch); }
.brand:hover { color: var(--color-text-primary); }
.brand-logo { width: 44px; height: 44px; border-radius: 12px; }
.brand { max-width: 18rem; }
.brand-text { display: grid; line-height: 1.2; }
.brand-text strong { font-weight: 700; font-size: 15px; letter-spacing: -0.01em; }
.brand-text small { color: var(--color-text-muted); font-size: 13px; }

.main-nav { display: flex; flex-wrap: wrap; gap: 4px; margin-inline-end: auto; }
.nav-link {
  display: inline-flex; align-items: center; gap: 8px; min-height: var(--touch); padding: 0 16px;
  border-radius: 9999px; color: var(--color-text-secondary); font-weight: 500; text-decoration: none;
  transition: background-color 0.2s ease;
}
.nav-link:hover { background: var(--color-secondary); color: var(--color-text-primary); }
.nav-link { position: relative; }
.nav-link[aria-current="page"] { color: var(--color-primary-fg); font-weight: 600; }
.nav-link[aria-current="page"]::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 3px; height: 3px; border-radius: 9999px; background: var(--color-accent);
}

.header-actions { display: flex; align-items: center; gap: 8px; margin-inline-start: auto; }

/* Chọn giao diện sáng / tự động / tối */
.theme-switch { display: inline-flex; padding: 2px; gap: 2px; border-radius: 9999px; background: var(--color-bg-tertiary); }
.theme-switch button {
  display: inline-grid; place-items: center; width: var(--touch); height: var(--touch); padding: 0;
  border: 0; border-radius: 9999px; background: transparent; color: var(--color-text-muted); cursor: pointer;
}
.theme-switch button:hover { color: var(--color-text-primary); }
.theme-switch button[aria-pressed="true"] { background: var(--color-primary); color: var(--color-on-primary); box-shadow: 0 0 0 1px var(--color-primary-edge); }

/* Menu người dùng (details/summary, không cần JS) */
.user-menu { position: relative; }
.user-menu summary {
  display: inline-flex; align-items: center; gap: 10px; min-height: var(--touch); padding: 0 8px 0 4px;
  border-radius: 9999px; cursor: pointer; list-style: none; color: var(--color-text-primary); font-weight: 500;
}
.user-menu summary::-webkit-details-marker { display: none; }
.user-menu summary:hover { background: var(--color-secondary); }
.avatar {
  display: inline-grid; place-items: center; width: 36px; height: 36px; border-radius: 9999px;
  background: var(--color-primary); color: var(--color-on-primary); font-weight: 700; font-size: 15px;
}
.user-name { max-width: 14ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-menu[open] .chevron { transform: rotate(180deg); }
.chevron { transition: transform 0.2s ease; }
.menu-panel {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 60; min-width: 240px; padding: 8px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-inner);
  box-shadow: var(--shadow-lift);
}
.menu-who { padding: 8px 12px 12px; border-bottom: 1px solid var(--color-divider); margin-bottom: 6px; }
.menu-who strong { display: block; overflow-wrap: anywhere; }
.menu-item {
  display: flex; align-items: center; gap: 10px; width: 100%; min-height: var(--touch); padding: 0 12px;
  border: 0; border-radius: 10px; background: none; color: var(--color-text-primary);
  font: inherit; text-align: left; text-decoration: none; cursor: pointer;
}
.menu-item:hover { background: var(--color-secondary); color: var(--color-text-primary); }
.menu-panel form { margin: 0; }

/* ---------- Nút (bo 9999px chỉ cho nút — B3) ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: var(--touch); padding: 0 24px; border: 1px solid transparent; border-radius: 9999px;
  font: 600 1rem / 1 var(--font-sans); text-decoration: none; cursor: pointer;
  transition: background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary { background: var(--color-primary); color: var(--color-on-primary); border-color: var(--color-primary-edge); box-shadow: var(--shadow-primary); }
.btn-primary:hover { background: var(--color-primary-hover); color: var(--color-on-primary); }
.btn-accent { background: var(--color-accent); color: var(--color-on-accent); box-shadow: 0 10px 24px -10px rgba(255, 85, 0, 0.55); }
.btn-accent:hover { background: var(--color-accent-hover); color: var(--color-on-accent); }
.btn-secondary { background: var(--color-surface); color: var(--color-text-primary); border-color: var(--color-border-input); }
.btn-secondary:hover { background: var(--color-secondary); color: var(--color-text-primary); transform: translateY(-2px); }
.btn-block { width: 100%; }
.btn[aria-busy="true"] { cursor: progress; opacity: 0.8; pointer-events: none; }
.btn[aria-busy="true"]::before {
  content: ""; width: 14px; height: 14px; border-radius: 9999px;
  border: 2px solid currentColor; border-right-color: transparent; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.btn-text {
  min-height: var(--touch); padding: 0 12px; border: 0; border-radius: 10px; background: none;
  color: var(--color-primary-fg); font: 600 var(--fs-small) / 1 var(--font-sans); cursor: pointer;
}
.btn-text:hover { background: var(--color-secondary); }

/* ---------- Card ---------- */
.card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-card);
  box-shadow: var(--shadow-card); padding: clamp(20px, 3vw, 32px);
}
.card-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 16px; margin-bottom: 8px; }
a.card-hover, .card-hover {
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease, border-color 0.25s ease;
}
.card-hover:hover { transform: translateY(-3px); border-color: var(--color-primary-fg); box-shadow: var(--shadow-lift); }

/* ---------- Trang ---------- */
.page-title { font-size: var(--fs-h2); max-width: none; }
.page-title .accent { color: var(--color-accent-text); }
.section-title { font-size: var(--fs-h3); font-weight: 700; letter-spacing: -0.01em; line-height: 1.25; }
.flash-wrap { padding-top: var(--page-y); }
.flash-wrap + .page { padding-top: 8px; }
.flash-wrap .alert { margin-bottom: 0; }
.spaced { margin-top: 16px; }
.page { padding-block: var(--page-y) calc(var(--page-y) * 1.5); }
.page-head { display: grid; gap: 8px; margin-bottom: clamp(20px, 3vw, 32px); }
.page-head .lead { max-width: 42rem; color: var(--color-text-secondary); }
.stack { display: grid; gap: var(--gap); }
.stack > * { min-width: 0; } /* để bảng rộng cuộn trong khung thay vì làm cả trang tràn ngang */
.settings-grid { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fit, minmax(min(100%, 28rem), 1fr)); align-items: start; }
.narrow { max-width: 34rem; }

/* ---------- Form (B5) ---------- */
.form-note { color: var(--color-text-muted); font-size: var(--fs-small); margin-bottom: 4px; }
.field { display: grid; gap: 6px; margin-block: 18px; }
.field label, .field .label { font-weight: 600; font-size: 15px; }
.req { color: var(--color-error-text); margin-inline-start: 2px; }
.hint { color: var(--color-text-muted); font-size: var(--fs-small); }
.field input:not([type="checkbox"]):not([type="radio"]), .field select, .field textarea {
  width: 100%; min-height: var(--touch); padding: 10px 14px; font: inherit;
  color: var(--color-text-primary); background: var(--color-surface);
  border: 1px solid var(--color-border-input); border-radius: var(--radius-field);
}
.field input::placeholder { color: var(--color-text-muted); opacity: 1; }
.field textarea { resize: vertical; min-height: 6rem; }
.field input[aria-invalid="true"], .field select[aria-invalid="true"], .field textarea[aria-invalid="true"] {
  border-color: var(--color-error-text); box-shadow: inset 0 0 0 1px var(--color-error-text);
}
.field-error { display: none; align-items: flex-start; gap: 6px; color: var(--color-error-text); font-size: var(--fs-small); font-weight: 500; }
.field-error:not(:empty) { display: flex; }
.field-row { display: grid; gap: 0 16px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 12rem), 1fr)); }
.input-group { position: relative; }
.input-group input { padding-inline-end: 76px; }
.input-group .btn-text { position: absolute; right: 2px; top: 0; }
.form-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* Công tắc bật/tắt */
.switch { display: flex; align-items: center; gap: 12px; min-height: var(--touch); font-weight: 600; cursor: pointer; margin-block: 12px; }
.switch input {
  appearance: none; flex: none; position: relative; width: 48px; height: 28px; margin: 0;
  border-radius: 9999px; background: var(--color-bg-tertiary); border: 1px solid var(--color-border-input); cursor: pointer;
  transition: background-color 0.2s ease;
}
.switch input::before {
  content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 9999px;
  background: var(--color-text-muted); transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease;
}
.switch input:checked { background: var(--color-primary); border-color: var(--color-primary-edge); }
.switch input:checked::before { transform: translateX(20px); background: var(--color-on-primary); }

/* ---------- Thông báo (nền nhạt trọn khối + icon, không viền một cạnh — B3) ---------- */
.alert { display: flex; align-items: flex-start; gap: 10px; padding: 12px 16px; margin-bottom: 16px; border-radius: var(--radius-inner); }
.alert svg { flex: none; margin-top: 3px; }
.alert p + p, .alert ul { margin-top: 4px; }
.alert ul { margin-bottom: 0; padding-inline-start: 18px; }
.alert a { color: inherit; font-weight: 600; }
.alert.error { background: var(--color-error-bg); color: var(--color-error-text); }
.alert.warn { background: var(--color-warn-bg); color: var(--color-warn-text); }
.alert.info, .alert.success { background: var(--color-info-bg); color: var(--color-info-text); }

/* ---------- Badge trạng thái (luôn kèm icon + chữ) ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 6px; padding: 2px 12px 2px 8px; border-radius: 9999px;
  font-size: var(--fs-small); font-weight: 600; background: var(--color-bg-tertiary); color: var(--color-text-muted);
}
.badge.on { background: var(--color-info-bg); color: var(--color-info-text); }
.badge.warn { background: var(--color-warn-bg); color: var(--color-warn-text); }

/* ---------- Danh sách trạng thái (container query — B2) ---------- */
.status-list { container-type: inline-size; margin: 0; padding: 0; list-style: none; }
.status-row { display: grid; gap: 10px 16px; padding-block: 16px; }
.status-row + .status-row { border-top: 1px solid var(--color-divider); }
.status-row h3 { font-size: 17px; }
@container (min-width: 34rem) {
  .status-row { grid-template-columns: 1fr auto auto; align-items: center; }
}

/* ---------- Trạng thái rỗng / lỗi (B6) ---------- */
.empty { display: grid; justify-items: start; gap: 12px; max-width: 36rem; }
.empty-icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 9999px; background: var(--color-bg-tertiary); color: var(--color-primary-fg); }
.error-code { font-family: var(--font-mono); font-size: var(--fs-small); color: var(--color-text-muted); }
.error-page { min-height: 60dvh; display: grid; align-items: center; }

/* ---------- Trang đăng nhập ---------- */
.auth-shell { display: grid; min-height: 100dvh; grid-template-columns: repeat(auto-fit, minmax(min(100%, 26rem), 1fr)); }
.auth-hero {
  display: flex; flex-direction: column; align-items: flex-start; gap: 24px; justify-content: flex-start;
  padding: clamp(32px, 6vw, 72px); background: var(--gradient-dawn); color: #ffffff;
}
.auth-hero h1 { color: #ffffff; }
.auth-hero .lead { max-width: 24rem; text-wrap: balance; color: #e6eff7; font-size: 1.0625rem; }
.auth-hero .brand-logo { width: 84px; height: 84px; border-radius: 20px; border: 1px solid rgba(255, 255, 255, 0.28); }
.auth-hero .school { font-weight: 600; letter-spacing: 0.02em; color: #e6eff7; }
.accent-rule { width: 56px; height: 6px; border-radius: 9999px; background: var(--color-accent); }
.auth-panel { display: flex; flex-direction: column; padding: clamp(16px, 3vw, 32px); background: var(--color-bg-secondary); }
.auth-panel .theme-switch { align-self: flex-end; }
.auth-card-wrap { flex: 1; display: grid; place-items: center; padding-block: 24px; }
.auth-card { width: 100%; max-width: 26rem; }
.auth-card h2 { font-size: var(--fs-h3); letter-spacing: -0.01em; margin-bottom: 4px; }
.auth-footer { text-align: center; color: var(--color-text-muted); font-size: var(--fs-small); }

/* ---------- Captcha ---------- */
.captcha-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; }
.captcha-row .captcha-input { flex: 1 1 8rem; width: auto; letter-spacing: 0.2em; text-transform: uppercase; }
.captcha-img { border-radius: var(--radius-field); border: 1px solid var(--color-border-input); background: #f5f6fa; }

/* ---------- Mục con của Cài đặt ---------- */
.subnav { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: var(--gap); padding: 4px; border-radius: 9999px; background: var(--color-bg-tertiary); width: fit-content; max-width: 100%; }
.subnav a { display: inline-flex; align-items: center; min-height: 40px; padding: 0 16px; border-radius: 9999px; color: var(--color-text-secondary); font-weight: 500; text-decoration: none; }
.subnav a:hover { background: var(--color-secondary); color: var(--color-text-primary); }
.subnav a[aria-current="page"] { background: var(--color-primary); color: var(--color-on-primary); box-shadow: 0 0 0 1px var(--color-primary-edge); font-weight: 600; }

/* ---------- Khối kiểm tra kết nối ---------- */
.test-box { margin-top: 24px; padding: 16px 20px; border-radius: var(--radius-inner); background: var(--color-bg-secondary); }
.test-box h3 { font-size: 17px; }
.test-box .field { margin-block: 12px; }
.test-result { margin-top: 12px; }
.test-result:empty { display: none; }

/* ---------- Nhóm lựa chọn (radio) ---------- */
.choice-list { display: grid; gap: 8px; margin: 12px 0 0; padding: 0; border: 0; }
.choice { display: flex; align-items: flex-start; gap: 12px; padding: 12px 16px; border: 1px solid var(--color-border-input); border-radius: var(--radius-inner); cursor: pointer; min-height: var(--touch); }
.choice:has(input:checked) { background: var(--color-info-bg); border-color: var(--color-primary-fg); }
.choice input { margin-top: 4px; width: 20px; height: 20px; accent-color: var(--color-primary); flex: none; }
.choice strong { display: block; }
.choice span { color: var(--color-text-muted); font-size: var(--fs-small); }

/* ---------- Bảng dữ liệu ---------- */
.table-wrap { position: relative; overflow-x: auto; border: 1px solid var(--color-border); border-radius: var(--radius-inner); }
.table { width: 100%; border-collapse: collapse; font-size: var(--fs-small); }
.table th, .table td { padding: 10px 14px; text-align: left; border-bottom: 1px solid var(--color-divider); white-space: nowrap; }
.table th { font-weight: 600; color: var(--color-text-secondary); background: var(--color-bg-secondary); }
.table tr:last-child td, .table tr:last-child th { border-bottom: 0; }
.table.wrap th, .table.wrap td { white-space: normal; overflow-wrap: anywhere; }
.table.wrap th { width: 55%; background: transparent; }
.stat-row { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); margin-block: 16px; }
.stat { padding: 12px 16px; border-radius: var(--radius-inner); background: var(--color-bg-secondary); }
.stat strong { display: block; font-size: 1.5rem; line-height: 1.2; }
.stat span { color: var(--color-text-muted); font-size: var(--fs-small); }

/* ---------- Thanh công cụ, phân trang, ma trận quyền ---------- */
.toolbar { display: flex; flex-wrap: wrap; align-items: end; gap: 12px 16px; margin-bottom: 16px; }
.toolbar .field { margin: 0; min-width: min(100%, 14rem); }
.toolbar .toolbar-end { margin-left: auto; }
.pager { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 12px 16px; margin-top: 16px; }
.perm-grid { display: grid; gap: var(--gap); grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); margin-top: 12px; }
.perm-group { margin: 0; padding: 12px 16px; border: 1px solid var(--color-border); border-radius: var(--radius-inner); background: var(--color-bg-secondary); }
.perm-group legend { padding: 0 6px; font-weight: 600; }
.perm-group label { display: flex; align-items: flex-start; gap: 10px; padding: 6px 0; min-height: 32px; cursor: pointer; }
.perm-group input { margin-top: 3px; width: 18px; height: 18px; accent-color: var(--color-primary); flex: none; }
.check-list { display: grid; gap: 4px; margin: 0; padding: 0; border: 0; }
.check-list label { display: flex; align-items: center; gap: 10px; min-height: var(--touch); cursor: pointer; }
.check-list input { width: 20px; height: 20px; accent-color: var(--color-primary); flex: none; }
.cell-wrap { white-space: normal !important; max-width: 28rem; overflow-wrap: anywhere; }
.week-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(min(100%, 15rem), 1fr)); margin-top: 16px; }
.day-card { padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-inner); background: var(--color-bg-secondary); }
.day-card h3 { font-size: 1rem; margin: 0 0 8px; }
.entry-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.entry-list li { display: grid; gap: 2px; padding-bottom: 10px; border-bottom: 1px solid var(--color-divider); }
.entry-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.photo-row { display: flex; flex-wrap: wrap; gap: 12px; }
.photo-row img { border-radius: var(--radius-inner); border: 1px solid var(--color-border); object-fit: cover; }
.qr-box { display: grid; place-items: center; padding: 16px; background: #ffffff; border-radius: var(--radius-inner); border: 1px solid var(--color-border); width: fit-content; }
.stat-link { text-decoration: none; color: inherit; border: 1px solid transparent; }
.stat-link:hover, .stat-link:focus-visible { border-color: var(--color-primary-fg); }
.bars { list-style: none; margin: 12px 0 0; padding: 0; display: grid; gap: 8px; }
.bars li { display: grid; grid-template-columns: minmax(6rem, 14rem) 1fr minmax(4rem, auto); align-items: center; gap: 4px 12px; }
.bar { width: 100%; height: 14px; }
.bar-bg { fill: var(--color-bg-tertiary); }
.bar-fill { fill: var(--color-primary); }
.bar-label { overflow-wrap: anywhere; font-size: var(--fs-small); }
.bar-value { font-size: var(--fs-small); color: var(--color-text-secondary); white-space: nowrap; }
@media (max-width: 40rem) { .bars li { grid-template-columns: 1fr; } }
.steps { margin: 0; padding-left: 1.25rem; display: grid; gap: 8px; }
.json-box { margin: 8px 0 0; padding: 10px 12px; border-radius: var(--radius-inner); background: var(--color-bg-secondary); font-family: var(--font-mono); font-size: var(--fs-small); white-space: pre-wrap; overflow-wrap: anywhere; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-bg-dark); color: var(--color-text-on-dark); border-top: 1px solid var(--color-border); padding-block: 24px; font-size: var(--fs-small); }
.site-footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px; }

/* Mã liên kết Telegram trên trang hồ sơ */
.link-code { font-size: 1.25rem; letter-spacing: 0.15em; padding: 2px 8px; border-radius: var(--radius-sm, 6px); background: var(--surface-2, rgba(127, 127, 127, 0.12)); }