/* ==========================================================================
   Design tokens & thành phần dùng chung (trang công khai + quản trị)
   ========================================================================== */
:root {
  color-scheme: light;
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --surface-3: #eef2f6;
  --line: #e2e8f0;
  --line-strong: #cbd5e1;
  --ink: #0f1b2d;
  --ink-2: #334155;
  --ink-3: #64748b;
  --ink-4: #94a3b8;

  --brand: #0b2f52;
  --brand-2: #12406d;
  --brand-soft: #e8f0f8;
  --accent: #f59e0b;
  --accent-2: #d97706;
  --accent-ink: #3b2300;
  --accent-soft: #fff6e5;
  --focus: #2563eb;

  /* Trạng thái – dành riêng, luôn đi kèm nhãn chữ */
  --st-new: #1d4ed8;        --st-new-bg: #e8efff;
  --st-reviewing: #a16207;  --st-reviewing-bg: #fef6d8;
  --st-verified: #15803d;   --st-verified-bg: #dcfce7;
  --st-rejected: #b91c1c;   --st-rejected-bg: #fee2e2;
  --ok: #15803d; --ok-bg: #dcfce7;
  --warn: #a16207; --warn-bg: #fef6d8;
  --danger: #b91c1c; --danger-bg: #fee2e2;

  --series-1: #2a78d6;
  --series-muted: #c3cad4;

  --radius-lg: 16px;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(15, 27, 45, .06);
  --shadow: 0 1px 3px rgba(15, 27, 45, .06), 0 8px 24px rgba(15, 27, 45, .06);
  --shadow-lg: 0 24px 64px rgba(15, 27, 45, .22);
  --font: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; font-family: var(--font); font-size: 15px; line-height: 1.55; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--brand-2); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 .5em; letter-spacing: -.01em; color: var(--ink); }
p { margin: 0 0 1em; }
[hidden] { display: none !important; }
:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.muted { color: var(--ink-3); }
.small { font-size: 13px; }
.nowrap { white-space: nowrap; }
.num { font-variant-numeric: tabular-nums; }
svg.i { width: 18px; height: 18px; flex: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 40px; padding: 0 16px; border: 1px solid transparent; border-radius: var(--radius-sm);
  font: inherit; font-size: 14.5px; font-weight: 600; line-height: 1; text-decoration: none; white-space: nowrap;
  cursor: pointer; color: var(--ink); background: var(--surface); border-color: var(--line-strong);
  transition: background .15s, border-color .15s, box-shadow .15s, transform .05s;
}
.btn:hover { background: var(--surface-2); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; transform: none; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-2); }
.btn-accent { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn-accent:hover { background: #fbab21; }
.btn-ghost { background: transparent; border-color: transparent; color: var(--ink-2); }
.btn-ghost:hover { background: var(--surface-3); }
.btn-danger { background: var(--surface); border-color: #f3c4c4; color: var(--danger); }
.btn-danger:hover { background: var(--danger-bg); }
.btn-lg { min-height: 50px; padding: 0 24px; font-size: 16px; border-radius: 10px; }
.btn-sm { min-height: 32px; padding: 0 11px; font-size: 13px; }
.btn-block { width: 100%; }
.btn-icon { width: 38px; padding: 0; }
.btn-icon.btn-sm { width: 32px; }

/* ---------- Forms ---------- */
.field { display: grid; gap: 6px; min-width: 0; }
.field-label { font-size: 13.5px; font-weight: 600; color: var(--ink-2); }
.field-label small, .field-hint { font-weight: 400; color: var(--ink-3); font-size: 12.5px; }
.input {
  width: 100%; min-height: 42px; padding: 9px 12px; border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  font: inherit; font-size: 15px; color: var(--ink); background: var(--surface); transition: border-color .15s, box-shadow .15s;
}
select.input { padding-right: 32px; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2.5'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 12px center; }
textarea.input { min-height: 88px; resize: vertical; line-height: 1.5; }
.input:hover { border-color: var(--ink-4); }
.input:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 3px rgba(37, 99, 235, .15); }
.input:disabled { background: var(--surface-2); color: var(--ink-4); }
.input-group { display: flex; align-items: stretch; }
.input-group .input { border-top-right-radius: 0; border-bottom-right-radius: 0; }
.input-group .addon { display: flex; align-items: center; padding: 0 12px; border: 1px solid var(--line-strong); border-left: 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; background: var(--surface-2); color: var(--ink-3); font-size: 14px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
@media (max-width: 600px) { .grid-2, .grid-3 { grid-template-columns: 1fr; } }

.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--ink-2); cursor: pointer; }
.check input { width: 18px; height: 18px; margin: 2px 0 0; accent-color: var(--brand); flex: none; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip span { display: inline-flex; align-items: center; gap: 6px; min-height: 38px; padding: 0 14px; border: 1px solid var(--line-strong); border-radius: 999px; font-size: 14px; font-weight: 500; cursor: pointer; background: var(--surface); transition: all .15s; }
.chip input:checked + span { border-color: var(--brand); background: var(--brand-soft); color: var(--brand); font-weight: 600; }
.chip input:focus-visible + span { outline: 2px solid var(--focus); outline-offset: 2px; }

/* ---------- Badges ---------- */
.badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; white-space: nowrap; line-height: 1.4; }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge-plain::before { display: none; }
.st-new { color: var(--st-new); background: var(--st-new-bg); }
.st-reviewing { color: var(--st-reviewing); background: var(--st-reviewing-bg); }
.st-verified { color: var(--st-verified); background: var(--st-verified-bg); }
.st-rejected { color: var(--st-rejected); background: var(--st-rejected-bg); }
.tag { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 6px; font-size: 12px; font-weight: 500; background: var(--surface-3); color: var(--ink-2); white-space: nowrap; }

/* ---------- Cards, alerts ---------- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.alert { display: flex; gap: 10px; padding: 12px 14px; border-radius: var(--radius-sm); font-size: 14px; line-height: 1.5; }
.alert svg { width: 18px; height: 18px; flex: none; margin-top: 1px; }
.alert-error { background: var(--danger-bg); color: var(--danger); }
.alert-warn { background: var(--warn-bg); color: #854d0e; }
.alert-info { background: var(--brand-soft); color: var(--brand); }
.alert-ok { background: var(--ok-bg); color: var(--ok); }

/* ---------- Dialog ---------- */
dialog.modal { width: min(520px, calc(100% - 32px)); max-height: calc(100vh - 32px); padding: 0; border: 0; border-radius: var(--radius-lg); background: var(--surface); color: var(--ink); box-shadow: var(--shadow-lg); }
dialog.modal::backdrop { background: rgba(15, 27, 45, .5); backdrop-filter: blur(2px); }
dialog.modal[open] { display: flex; flex-direction: column; }
.modal-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); }
.modal-head h2 { font-size: 17px; margin: 0; }
.modal-body { padding: 20px; overflow-y: auto; display: grid; gap: 16px; }
.modal-foot { display: flex; justify-content: flex-end; gap: 10px; padding: 14px 20px; border-top: 1px solid var(--line); background: var(--surface-2); border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
.icon-btn { width: 36px; height: 36px; border-radius: 50%; border: 0; background: transparent; display: grid; place-items: center; cursor: pointer; color: var(--ink-3); flex: none; }
.icon-btn:hover { background: var(--surface-3); color: var(--ink); }
.icon-btn svg { width: 20px; height: 20px; }

/* ---------- Toast ---------- */
.toast-stack { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 5000; display: grid; gap: 8px; width: max-content; max-width: calc(100% - 32px); pointer-events: none; }
.toast { display: flex; align-items: center; gap: 10px; padding: 11px 16px; border-radius: 10px; background: var(--ink); color: #fff; font-size: 14px; box-shadow: var(--shadow-lg); animation: toast-in .2s ease-out; }
.toast.error { background: var(--danger); }
.toast svg { width: 18px; height: 18px; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

/* ---------- Spinner & skeleton ---------- */
.spinner { width: 18px; height: 18px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.skeleton { background: linear-gradient(90deg, var(--surface-3) 25%, var(--surface-2) 50%, var(--surface-3) 75%); background-size: 200% 100%; animation: shimmer 1.2s infinite; border-radius: 6px; }
@keyframes shimmer { to { background-position: -200% 0; } }

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

/* Ô số không hợp lệ */
.input[aria-invalid=true] { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(185, 28, 28, .12); }