/* admin.css — Giao diện quản trị: console/terminal aesthetic, dark mặc định + light toggle.
   Mọi id/class hiện có được giữ nguyên để không phá JS (xem nav.php, index.php, knowledge.php). */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;1,400&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  --bg: #0a0e14;
  --surface: #12161f;
  --surface-2: #171c26;
  --border: #232935;
  --border-soft: #1a2029;
  --text: #e6e9ef;
  --text-dim: #8b93a3;
  --text-faint: #5b6472;
  --accent: #5eead4;
  --accent-dim: #2dd4bf;
  --accent-ink: #04201c;
  --warn: #f59e0b;
  --danger: #f43f5e;
  --danger-dim: #9f1239;
  --ok: #34d399;
  --ok-bg: rgba(52, 211, 153, 0.12);
  --danger-bg: rgba(244, 63, 94, 0.12);
  --font-body: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Consolas, monospace;
  --radius: 10px;
  --sidebar-w: 216px;
}

[data-theme="light"] {
  --bg: #f6f5f2;
  --surface: #ffffff;
  --surface-2: #fbfaf7;
  --border: #e4e1da;
  --border-soft: #ece9e2;
  --text: #1c1d1f;
  --text-dim: #6b6a66;
  --text-faint: #9a988f;
  --accent: #0d9488;
  --accent-dim: #0f766e;
  --accent-ink: #ecfdf9;
  --ok-bg: rgba(13, 148, 136, 0.1);
  --danger-bg: rgba(244, 63, 94, 0.08);
}

* { box-sizing: border-box; }
html { color-scheme: dark; }
[data-theme="light"] html, [data-theme="light"] { color-scheme: light; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  margin: 0;
  font-size: 14.5px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 { font-family: var(--font-body); font-weight: 700; letter-spacing: -0.01em; color: var(--text); }
h1 { font-size: 19px; margin: 0; }
h2 {
  font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.08em;
  font-family: var(--font-mono); font-weight: 600; color: var(--text-dim);
  margin: 0 0 16px; display: flex; align-items: center; gap: 8px;
}
h2::before { content: '//'; color: var(--accent); font-weight: 700; }
h3 { font-size: 13px; margin: 16px 0 8px; color: var(--text-dim); font-family: var(--font-mono); font-weight: 500; }

a { color: var(--accent); }

/* ---------- Shell layouts ---------- */

/* Layout đăng nhập / thiết lập lần đầu (chưa có sidebar) */
.auth-shell {
  min-height: 100dvh; display: flex; align-items: center; justify-content: center;
  padding: 24px; position: relative; overflow: hidden;
}
.auth-shell::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(var(--border-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-soft) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 75%);
}
.auth-shell .wrap { max-width: 420px; width: 100%; position: relative; }
.auth-shell h1 { text-align: center; margin-bottom: 4px; }
.auth-shell .brand-eyebrow {
  text-align: center; font-family: var(--font-mono); font-size: 11px; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.12em; margin-bottom: 8px; display: block;
}

/* Layout chính có sidebar (đã đăng nhập) */
.app-shell { display: flex; min-height: 100dvh; }
.wrap {
  max-width: 760px; margin: 0; padding: 32px 40px 60px;
  flex: 1 1 auto; min-width: 0;
}

/* ---------- Sidebar ---------- */
.admin-nav {
  width: var(--sidebar-w); flex: 0 0 auto; background: var(--surface);
  border-right: 1px solid var(--border); min-height: 100dvh;
  display: flex; flex-direction: column; padding: 20px 14px; position: sticky; top: 0;
  gap: 2px;
}
.admin-nav .brand {
  font-family: var(--font-mono); font-weight: 700; font-size: 14px; color: var(--text);
  padding: 6px 10px 18px; display: flex; align-items: center; gap: 8px;
}
.admin-nav .brand .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 8px var(--accent); flex: 0 0 auto; }
.admin-nav a {
  padding: 9px 10px; border-radius: 7px; text-decoration: none; font-size: 13px;
  font-weight: 500; color: var(--text-dim); display: flex; align-items: center; gap: 9px;
  border: 1px solid transparent; transition: background .12s ease, color .12s ease;
}
.admin-nav a:hover { background: var(--surface-2); color: var(--text); }
.admin-nav a.active { background: var(--accent-ink); color: var(--accent); border-color: var(--border); font-weight: 600; }
.admin-nav a.logout { margin-top: auto; color: var(--danger); }
.admin-nav a.logout:hover { background: var(--danger-bg); }
.admin-nav .nav-spacer { flex: 1 1 auto; }
.admin-nav .theme-toggle {
  margin: 4px 4px 8px; padding: 8px 10px; border-radius: 7px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--text-dim); font-size: 12px; font-family: var(--font-mono);
  cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 8px;
}
.admin-nav .theme-toggle:hover { color: var(--text); border-color: var(--text-faint); }

/* ---------- Tabs (trang Cấu hình) ---------- */
.tabs {
  display: flex; gap: 4px; margin-bottom: 18px; border-bottom: 1px solid var(--border);
  overflow-x: auto; -ms-overflow-style: none; scrollbar-width: none;
}
.tabs::-webkit-scrollbar { display: none; }
.tab-btn {
  background: transparent; color: var(--text-dim); border: none; border-bottom: 2px solid transparent;
  border-radius: 0; padding: 10px 14px; font-family: var(--font-mono); font-size: 12.5px;
  font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase; cursor: pointer;
  white-space: nowrap; flex: 0 0 auto;
}
.tab-btn:hover { color: var(--text); filter: none; }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel[hidden] { display: none; }

/* ---------- Cards ---------- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px 22px 24px; margin-bottom: 18px;
}
label {
  display: block; font-size: 12.5px; font-weight: 600; margin-bottom: 16px; color: var(--text-dim);
  font-family: var(--font-mono); letter-spacing: 0.01em;
}
input, select, textarea {
  display: block; width: 100%; margin-top: 7px; padding: 10px 12px;
  border: 1px solid var(--border); border-radius: 7px; font-size: 14.5px; font-family: var(--font-body);
  font-weight: 400; color: var(--text); background: var(--surface-2);
}
input::placeholder, textarea::placeholder { color: var(--text-faint); }
/* Color picker: bỏ khung trắng mặc định của trình duyệt, hòa với theme tối/sáng */
input[type="color"] {
  height: 42px; padding: 3px; cursor: pointer; background: var(--surface-2);
  -webkit-appearance: none; appearance: none;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; border-radius: 4px; overflow: hidden; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 4px; }
input[type="color"]::-moz-color-swatch { border: none; border-radius: 4px; }
textarea { resize: vertical; font-family: var(--font-body); }
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}
input[type="number"], input[type="password"]:not([name*="password"]) { font-family: var(--font-mono); }

.row { display: flex; gap: 14px; }
.row label { flex: 1; }

.hint { display: block; font-weight: 400; font-size: 12px; color: var(--text-faint); margin-top: 6px; font-family: var(--font-body); }
.muted { color: var(--text-dim); font-size: 13px; margin: 0 0 14px; }

/* ---------- Buttons ---------- */
button {
  background: var(--accent); color: var(--accent-ink); border: none; border-radius: 7px;
  padding: 10px 18px; font-size: 13.5px; font-weight: 600; cursor: pointer; font-family: var(--font-body);
  transition: filter .12s ease, transform .05s ease;
}
button:hover { filter: brightness(1.08); }
button:active { transform: scale(.98); }
button.save {
  width: 100%; padding: 14px; font-size: 14px; margin-bottom: 18px;
  font-family: var(--font-mono); letter-spacing: 0.02em; text-transform: uppercase;
}
button.btn-del { background: transparent; color: var(--danger); border: 1px solid var(--danger-dim); padding: 6px 12px; font-size: 12px; }
button.btn-del:hover { background: var(--danger-bg); filter: none; }

/* ---------- Alerts ---------- */
.alert {
  padding: 11px 14px; border-radius: 7px; margin-bottom: 18px; font-size: 13.5px;
  border: 1px solid transparent; font-family: var(--font-mono);
}
.alert.ok  { background: var(--ok-bg); color: var(--ok); border-color: color-mix(in srgb, var(--ok) 30%, transparent); }
.alert.err { background: var(--danger-bg); color: var(--danger); border-color: color-mix(in srgb, var(--danger) 30%, transparent); }

.topbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 20px; }
.link { color: var(--accent); text-decoration: none; font-size: 13px; font-weight: 600; }
.link:hover { text-decoration: underline; }

pre {
  background: var(--bg); color: var(--accent); padding: 13px 15px; border-radius: 7px;
  font-size: 12.5px; overflow-x: auto; white-space: pre-wrap; word-break: break-all;
  font-family: var(--font-mono); border: 1px solid var(--border);
}

/* ---------- Q&A / Documents ---------- */
.qa-item, .doc-item {
  border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 16px; margin-bottom: 10px;
  background: var(--surface-2);
}
.qa-q { font-size: 14px; margin-bottom: 6px; color: var(--text); }
.qa-a { font-size: 14px; color: var(--text-dim); }
.btn-del { }
.doc-meta { font-size: 11.5px; color: var(--text-faint); margin-top: 6px; font-family: var(--font-mono); }
.badge {
  display: inline-block; font-size: 10.5px; padding: 2px 8px; border-radius: 20px;
  background: var(--accent-ink); color: var(--accent); font-family: var(--font-mono);
  text-transform: uppercase; letter-spacing: 0.04em; font-weight: 600;
}

/* ---------- Hội thoại ---------- */
.msg-row { padding: 10px 13px; border-radius: 9px; margin-bottom: 8px; font-size: 14px; border: 1px solid var(--border-soft); }
.msg-row.user { background: var(--accent-ink); border-color: color-mix(in srgb, var(--accent) 25%, transparent); }
.msg-row.assistant { background: var(--surface-2); }
.msg-role {
  font-size: 10.5px; font-weight: 700; text-transform: uppercase; color: var(--text-faint);
  font-family: var(--font-mono); letter-spacing: 0.06em; margin-bottom: 4px; display: block;
}

/* ---------- Scrollbar (kính console) ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 6px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-faint); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .app-shell { flex-direction: column; }
  .admin-nav { width: 100%; min-height: auto; flex-direction: row; overflow-x: auto; position: static; border-right: none; border-bottom: 1px solid var(--border); }
  .admin-nav .brand { display: none; }
  .admin-nav .nav-spacer { display: none; }
  .admin-nav .theme-toggle { margin: 0 0 0 auto; }
  .wrap { padding: 20px; }
  .row { flex-direction: column; gap: 0; }
}