/* Design tokens extracted from dashboard-than-nhap-khau-v3.html */
:root {
  --bg: #f5f7fa;
  --surface: #ffffff;
  --border: #e8ecf1;
  --text: #2d3436;
  --text2: #636e72;
  --accent: #f05a00;
  --accent2: #ffb000;
  --accent-rgb: 240, 90, 0;
  --accent2-rgb: 255, 176, 0;
  --red: #e17055;
  --green: #00b894;
  --orange: #fdcb6e;
  --yellow: #ffeaa7;
  --teal: #00cec9;
  --purple: #a29bfe;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(0,0,0,.04);
  --shadow2: 0 8px 30px rgba(0,0,0,.08);
  --gradient-accent: linear-gradient(135deg, #b22a00 0%, #f05a00 54%, #ffca2e 100%);
  --gradient-red: linear-gradient(135deg, #e17055, #fab1a0);
  --gradient-green: linear-gradient(135deg, #00b894, #55efc4);
  --gradient-orange: linear-gradient(135deg, #fdcb6e, #ffeaa7);
  --gradient-purple: linear-gradient(135deg, #6c5ce7, #a29bfe);
  --gradient-teal: linear-gradient(135deg, #00cec9, #81ecec);
  --chart-radius: 8px;
}
[data-theme="dark"] {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #21262d;
  --text: #e6edf3;
  --text2: #8b949e;
  --accent: #ff7a1a;
  --accent2: #ffd24a;
  --accent-rgb: 255, 122, 26;
  --accent2-rgb: 255, 210, 74;
  --red: #f97583;
  --green: #56d364;
  --orange: #e3b341;
  --yellow: #f8e3a1;
  --teal: #39d2c0;
  --purple: #bc8cff;
  --shadow: 0 2px 12px rgba(0,0,0,.4);
  --shadow2: 0 8px 30px rgba(0,0,0,.5);
  --gradient-accent: linear-gradient(135deg, #d83b00 0%, #ff7a1a 56%, #ffd24a 100%);
  --gradient-red: linear-gradient(135deg, #f97583, #ffa8a8);
  --gradient-green: linear-gradient(135deg, #56d364, #7ee787);
  --gradient-orange: linear-gradient(135deg, #e3b341, #f8e3a1);
  --gradient-purple: linear-gradient(135deg, #bc8cff, #d2a8ff);
  --gradient-teal: linear-gradient(135deg, #39d2c0, #56d4c8);
}

* { margin:0; padding:0; box-sizing:border-box; }
body { font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; background:var(--bg); color:var(--text); font-size:14px; line-height:1.6; transition:background .3s, color .3s; min-height:100vh; }
.container { max-width:1440px; margin:0 auto; padding:0 20px; }

/* Dark mode toggle */
.theme-toggle { flex:0 0 auto; width:40px; height:40px; border-radius:50%; border:1px solid var(--border); background:var(--surface); color:var(--text2); box-shadow:var(--shadow); cursor:pointer; display:flex; align-items:center; justify-content:center; font-size:16px; transition:all .3s; }
.theme-toggle:hover { color:var(--accent); border-color:var(--accent); background:var(--bg); transform:rotate(20deg); }
.header-context { font-size:12px; color:var(--text2); background:var(--surface); padding:6px 12px; border-radius:24px; font-weight:600; border:1px solid var(--border); box-shadow:var(--shadow); }
.header-context b { color:var(--accent); }

/* Primary tab bar (sections) */
.primary-tabs-wrap { position:sticky; top:0; z-index:90; background:var(--bg); padding:8px 0 4px; }
.primary-tabs-shell { display:flex; align-items:center; gap:10px; min-width:0; }
.app-brand { flex:0 0 auto; display:inline-flex; align-items:center; justify-content:center; width:54px; height:54px; border:1px solid var(--border); border-radius:var(--radius); background:var(--surface); box-shadow:var(--shadow); overflow:hidden; text-decoration:none; }
.app-logo { display:block; width:48px; height:48px; object-fit:contain; }
.app-logo-dark { display:none; }
[data-theme="dark"] .app-logo-light { display:none; }
[data-theme="dark"] .app-logo-dark { display:block; }
.primary-tabs { flex:1 1 auto; min-width:0; display:flex; gap:4px; overflow-x:auto; background:var(--surface); border-radius:var(--radius); padding:5px; box-shadow:var(--shadow); border:1px solid var(--border); scrollbar-width:none; }
.primary-tabs::-webkit-scrollbar { display:none; }
.primary-tab { flex:1 0 145px; justify-content:center; padding:11px 22px; font-size:13px; font-weight:700; color:var(--text2); background:none; border:none; cursor:pointer; white-space:nowrap; border-radius:calc(var(--radius) - 4px); transition:all .25s; letter-spacing:-.2px; text-decoration:none; display:inline-flex; align-items:center; gap:6px; text-align:center; }
.primary-tab:hover { color:var(--text); background:var(--bg); }
.primary-tab.active { color:#fff; background:var(--gradient-accent); box-shadow:0 4px 12px rgba(var(--accent-rgb),.24); }

/* Sub-nav */
.sub-nav-wrap { margin:16px 0 0; }
.sub-nav { display:flex; gap:4px; overflow-x:auto; background:var(--surface); border-radius:var(--radius); padding:5px; box-shadow:var(--shadow); border:1px solid var(--border); scrollbar-width:none; }
.sub-nav::-webkit-scrollbar { display:none; }
.sub-tab { padding:9px 18px; font-size:12.5px; font-weight:700; color:var(--text2); background:none; border:none; cursor:pointer; white-space:nowrap; border-radius:calc(var(--radius) - 4px); transition:all .2s; letter-spacing:-.2px; text-decoration:none; display:inline-flex; align-items:center; gap:4px; }
.sub-tab:hover { color:var(--text); background:var(--bg); }
.sub-tab.active { color:var(--accent); background:rgba(var(--accent-rgb),.08); font-weight:800; }

/* Buttons */
.btn { display:inline-flex; align-items:center; gap:6px; padding:8px 18px; border-radius:var(--radius); border:1px solid var(--border); background:var(--surface); color:var(--text); font-size:13px; cursor:pointer; font-weight:600; transition:all .2s; text-decoration:none; }
.btn:hover { border-color:var(--accent); color:var(--accent); transform:translateY(-1px); box-shadow:var(--shadow); }
.btn-primary { background:var(--gradient-accent); color:#fff; border:none; box-shadow:0 4px 14px rgba(var(--accent-rgb),.25); }
.btn-primary:hover { opacity:.92; transform:translateY(-2px); box-shadow:0 6px 20px rgba(var(--accent-rgb),.3); color:#fff; border:none; }
.btn-sm { padding:6px 14px; font-size:12px; border-radius:8px; }
.btn-ghost { background:transparent; border-color:transparent; }

/* Drop zone */
.drop-zone { border:2.5px dashed var(--border); border-radius:20px; padding:56px 48px; text-align:center; cursor:pointer; transition:all .3s; max-width:520px; width:100%; background:var(--surface); margin:0 auto; }
.drop-zone:hover, .drop-zone.dragover { border-color:var(--accent); background:rgba(var(--accent-rgb),.04); box-shadow:0 0 0 6px rgba(var(--accent-rgb),.06); }
.drop-zone h2 { font-size:22px; margin-bottom:8px; font-weight:800; color:var(--text); }
.drop-zone p { color:var(--text2); font-size:13px; }
.drop-zone input { display:none; }

/* Loading overlay */
.loading { display:none; position:fixed; inset:0; background:rgba(255,255,255,.9); z-index:150; align-items:center; justify-content:center; flex-direction:column; gap:14px; backdrop-filter:blur(6px); }
[data-theme="dark"] .loading { background:rgba(13,17,23,.9); }
.loading.show { display:flex; }
.spinner { width:40px; height:40px; border:3px solid var(--border); border-top-color:var(--accent); border-radius:50%; animation:spin .7s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }

/* Error overlay */
.error-overlay { display:none; position:fixed; inset:0; background:rgba(0,0,0,.5); z-index:200; align-items:center; justify-content:center; backdrop-filter:blur(4px); }
.error-overlay.show { display:flex; }
.error-box { background:var(--surface); border-radius:var(--radius); padding:28px; max-width:500px; width:90%; box-shadow:var(--shadow2); border-top:4px solid var(--red); }
.error-box h3 { color:var(--red); margin-bottom:10px; font-weight:800; }
.error-box p { color:var(--text2); font-size:13px; margin-bottom:16px; }
.error-box .detail { background:var(--bg); padding:10px 14px; border-radius:10px; font-size:12px; font-family:'JetBrains Mono',monospace; max-height:150px; overflow-y:auto; margin-bottom:16px; border:1px solid var(--border); }

/* Fade in animation */
@keyframes fadeIn { from { opacity:0; transform:translateY(6px); } to { opacity:1; transform:translateY(0); } }
.fade-in { animation:fadeIn .3s ease; }

/* Empty state */
.empty-state { text-align:center; padding:60px 20px; color:var(--text2); }
.empty-state h3 { font-size:16px; margin-bottom:8px; color:var(--text); }
.empty-state p { font-size:13px; max-width:440px; margin:0 auto 16px; }

/* Badge */
.badge { display:inline-flex; align-items:center; padding:2px 8px; border-radius:6px; font-size:11px; font-weight:700; background:var(--bg); color:var(--text2); letter-spacing:.3px; }
.badge.badge-accent { background:rgba(var(--accent-rgb),.12); color:var(--accent); }
.badge.badge-green { background:rgba(0,184,148,.12); color:var(--green); }
.badge.badge-red { background:rgba(225,112,85,.12); color:var(--red); }
.badge.badge-orange { background:rgba(253,203,110,.2); color:#c67500; }
[data-theme="dark"] .badge.badge-orange { color:var(--orange); }

/* Responsive */
@media (max-width: 768px) {
  .container { padding:0 14px; }
  .app-brand { width:48px; height:48px; }
  .app-logo { width:42px; height:42px; }
  .primary-tab { flex-basis:132px; padding:9px 14px; font-size:12px; }
  .sub-tab { padding:8px 14px; font-size:11px; }
  .theme-toggle { width:44px; height:44px; }
  .primary-tabs,
  .sub-nav {
    scrollbar-width: thin;
  }
  .primary-tabs::-webkit-scrollbar,
  .sub-nav::-webkit-scrollbar {
    display:block;
    height:4px;
  }
  .primary-tabs::-webkit-scrollbar-thumb,
  .sub-nav::-webkit-scrollbar-thumb {
    background:rgba(99,110,114,.28);
    border-radius:999px;
  }
}