/* ============================================================
   VShare - Giao diện (light/dark, responsive)
   ============================================================ */
:root {
  --bg: #f1f5f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --primary: #2563eb;
  --primary-600: #1d4ed8;
  --primary-soft: #dbeafe;
  --success: #16a34a;
  --success-soft: #dcfce7;
  --warning: #d97706;
  --warning-soft: #fef3c7;
  --danger: #dc2626;
  --danger-soft: #fee2e2;
  --purple: #7c3aed;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 1px 2px rgba(15, 23, 42, .04);
  --sidebar-w: 256px;
}
html[data-theme="dark"] {
  --bg: #0b1220;
  --surface: #111a2e;
  --surface-2: #0f1729;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --border: #22304d;
  --primary: #3b82f6;
  --primary-600: #60a5fa;
  --primary-soft: #1e293b;
  --success-soft: #14321f;
  --warning-soft: #3a2c10;
  --danger-soft: #3a1717;
  --shadow: 0 1px 3px rgba(0, 0, 0, .4);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* ---------- Tiện ích ---------- */
.hidden { display: none !important; }
.muted { color: var(--muted); }
.text-sm { font-size: 12.5px; }
.text-right { text-align: right; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.wrap { flex-wrap: wrap; }
.mt-2 { margin-top: 8px; } .mt-3 { margin-top: 12px; } .mt-4 { margin-top: 16px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; justify-content: center;
  height: 38px; padding: 0 16px; border-radius: 9px; border: 1px solid transparent;
  background: var(--primary); color: #fff; font-weight: 500; font-size: 13.5px;
  transition: .15s; white-space: nowrap;
}
.btn:hover { background: var(--primary-600); }
.btn svg { width: 16px; height: 16px; }
.btn.outline { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn.outline:hover { background: var(--surface-2); }
.btn.ghost { background: transparent; color: var(--text); }
.btn.ghost:hover { background: var(--surface-2); }
.btn.danger { background: var(--danger); }
.btn.danger:hover { filter: brightness(.92); }
.btn.sm { height: 32px; padding: 0 12px; font-size: 12.5px; }
.btn.icon { width: 36px; padding: 0; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

/* ---------- Form ---------- */
.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-weight: 500; font-size: 13px; }
.input, .select, textarea {
  width: 100%; height: 38px; padding: 0 12px; border-radius: 9px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font-size: 13.5px; outline: none; transition: .15s;
}
textarea { height: auto; min-height: 84px; padding: 10px 12px; resize: vertical; }
.input:focus, .select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-soft); }
.error-text { color: var(--danger); font-size: 12px; }

/* ---------- Card ---------- */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.card-head { padding: 16px 18px; border-bottom: 1px solid var(--border); }
.card-head h3 { font-size: 15px; }
.card-head p { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.card-body { padding: 18px; }

/* ---------- Badge ---------- */
.badge { display: inline-flex; align-items: center; padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 500; }
.badge.primary { background: var(--primary-soft); color: var(--primary); }
.badge.success { background: var(--success-soft); color: var(--success); }
.badge.warning { background: var(--warning-soft); color: var(--warning); }
.badge.danger { background: var(--danger-soft); color: var(--danger); }
.badge.gray { background: var(--surface-2); color: var(--muted); }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th { text-align: left; padding: 11px 14px; color: var(--muted); font-weight: 500; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 12px 14px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }

/* ---------- Grid ---------- */
.grid { display: grid; gap: 16px; }
.g-2 { grid-template-columns: repeat(2, 1fr); }
.g-3 { grid-template-columns: repeat(3, 1fr); }
.g-4 { grid-template-columns: repeat(4, 1fr); }
.g-5 { grid-template-columns: repeat(5, 1fr); }

/* ---------- Stat card ---------- */
.stat { display: flex; align-items: flex-start; justify-content: space-between; padding: 18px; }
.stat .label { color: var(--muted); font-size: 13px; }
.stat .value { font-size: 24px; font-weight: 700; margin-top: 4px; }
.stat .ico { width: 44px; height: 44px; border-radius: 10px; display: grid; place-items: center; }
.stat .ico svg { width: 20px; height: 20px; }
.ico.blue { background: var(--primary-soft); color: var(--primary); }
.ico.green { background: var(--success-soft); color: var(--success); }
.ico.amber { background: var(--warning-soft); color: var(--warning); }
.ico.purple { background: #ede9fe; color: var(--purple); }
html[data-theme="dark"] .ico.purple { background: #241a4d; }

/* ---------- Login ---------- */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px;
  background: radial-gradient(circle at top left, var(--primary-soft), var(--bg) 60%); }
.login-card { width: 100%; max-width: 400px; }
.login-logo { display: flex; flex-direction: column; align-items: center; gap: 10px; margin-bottom: 20px; }
.demo-box { margin-top: 16px; padding: 12px; border: 1px dashed var(--border); border-radius: 10px; background: var(--surface-2); font-size: 13px; }
.demo-box code { font-family: ui-monospace, monospace; }

/* ---------- Logo ---------- */
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 19px; }
.logo .mark { width: 36px; height: 36px; border-radius: 9px; background: linear-gradient(135deg, var(--primary), #3b82f6);
  display: grid; place-items: center; color: #fff; }
.logo .mark svg { width: 20px; height: 20px; }
.logo b { color: var(--primary); font-weight: 700; }

/* ---------- App layout ---------- */
.app { display: flex; min-height: 100vh; }
.sidebar { width: var(--sidebar-w); background: var(--surface); border-right: 1px solid var(--border);
  position: fixed; inset: 0 auto 0 0; display: flex; flex-direction: column; z-index: 40; }
.sidebar .brand { height: 64px; display: flex; align-items: center; padding: 0 20px; border-bottom: 1px solid var(--border); }
.nav { flex: 1; padding: 12px; overflow-y: auto; display: flex; flex-direction: column; gap: 4px; }
.nav a { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 9px; color: var(--muted); font-weight: 500; }
.nav a svg { width: 18px; height: 18px; }
.nav a:hover { background: var(--surface-2); color: var(--text); }
.nav a.active { background: var(--primary); color: #fff; }
.sidebar .foot { padding: 14px; border-top: 1px solid var(--border); }
.sidebar .foot .note { background: var(--surface-2); border-radius: 10px; padding: 10px; font-size: 12px; color: var(--muted); }

.main { flex: 1; margin-left: var(--sidebar-w); min-width: 0; display: flex; flex-direction: column; }
.header { height: 64px; position: sticky; top: 0; z-index: 30; display: flex; align-items: center; gap: 12px;
  padding: 0 20px; background: color-mix(in srgb, var(--surface) 85%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.breadcrumb { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; }
.breadcrumb .sep { opacity: .5; }
.breadcrumb .cur { color: var(--text); font-weight: 500; }
.header .right { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.avatar { width: 34px; height: 34px; border-radius: 50%; background: var(--primary-soft); color: var(--primary);
  display: grid; place-items: center; font-weight: 600; font-size: 13px; }
.content { padding: 22px; max-width: 1280px; width: 100%; margin: 0 auto; }
.content > * + * { margin-top: 20px; }

.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.page-head h1 { font-size: 22px; }
.page-head p { color: var(--muted); margin-top: 3px; }
.page-head .actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ---------- Dept cards ---------- */
.dept-code { width: 44px; height: 44px; border-radius: 10px; background: var(--primary-soft); color: var(--primary);
  display: grid; place-items: center; font-weight: 700; }
.metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; text-align: center; }
.metric { background: var(--surface-2); border-radius: 9px; padding: 8px 4px; }
.metric .n { font-weight: 700; font-size: 15px; }
.metric .l { font-size: 11px; color: var(--muted); }

/* ---------- Dropdown ---------- */
.menu-wrap { position: relative; }
.menu { position: absolute; right: 0; top: 40px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: var(--shadow); min-width: 170px; padding: 6px; z-index: 50; }
.menu button { display: flex; align-items: center; gap: 8px; width: 100%; padding: 8px 10px; border: none;
  background: transparent; color: var(--text); border-radius: 7px; font-size: 13px; text-align: left; }
.menu button:hover { background: var(--surface-2); }
.menu button.danger { color: var(--danger); }
.menu button svg { width: 15px; height: 15px; }
.menu hr { border: none; border-top: 1px solid var(--border); margin: 5px 0; }

/* ---------- Modal ---------- */
.overlay { position: fixed; inset: 0; background: rgba(2, 6, 23, .55); display: grid; place-items: center;
  z-index: 60; padding: 20px; }
.modal { background: var(--surface); border-radius: 14px; width: 100%; max-width: 520px; max-height: 90vh; overflow-y: auto; box-shadow: 0 20px 50px rgba(0,0,0,.3); }
.modal.lg { max-width: 780px; }
.modal-head { padding: 18px 20px; border-bottom: 1px solid var(--border); }
.modal-head h3 { font-size: 16px; }
.modal-head p { color: var(--muted); font-size: 13px; margin-top: 3px; }
.modal-body { padding: 20px; }
.modal-foot { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ---------- Toast ---------- */
.toasts { position: fixed; top: 16px; right: 16px; z-index: 80; display: flex; flex-direction: column; gap: 8px; }
.toast { background: var(--surface); border: 1px solid var(--border); border-left: 4px solid var(--primary);
  border-radius: 10px; padding: 12px 16px; box-shadow: var(--shadow); min-width: 240px; font-size: 13.5px; animation: slidein .2s ease; }
.toast.success { border-left-color: var(--success); }
.toast.error { border-left-color: var(--danger); }
.toast.info { border-left-color: var(--primary); }
@keyframes slidein { from { transform: translateX(30px); opacity: 0; } to { transform: none; opacity: 1; } }

/* ---------- Empty / dropzone ---------- */
.empty { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 44px 20px;
  border: 1px dashed var(--border); border-radius: var(--radius); color: var(--muted); }
.empty .eico { width: 54px; height: 54px; border-radius: 50%; background: var(--surface-2); display: grid; place-items: center; margin-bottom: 12px; }
.empty h3 { color: var(--text); font-size: 15px; }
.dropzone { border: 2px dashed var(--border); border-radius: 12px; padding: 40px; text-align: center; cursor: pointer; transition: .15s; }
.dropzone:hover, .dropzone.drag { border-color: var(--primary); background: var(--primary-soft); }
.dropzone .dico { width: 54px; height: 54px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); display: grid; place-items: center; margin: 0 auto 12px; }

/* ---------- Progress ---------- */
.progress { height: 6px; background: var(--surface-2); border-radius: 4px; overflow: hidden; flex: 1; }
.progress > i { display: block; height: 100%; background: var(--primary); transition: width .2s; }
.progress.done > i { background: var(--success); }

/* ---------- Chat ---------- */
.chat { display: flex; flex-direction: column; height: calc(100vh - 220px); min-height: 480px; }
.chat-body { flex: 1; overflow-y: auto; padding: 18px; display: flex; flex-direction: column; gap: 16px; }
.msg { display: flex; gap: 10px; max-width: 90%; }
.msg .who { width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; flex-shrink: 0; }
.msg.user { align-self: flex-end; flex-direction: row-reverse; }
.msg.user .who { background: var(--primary); color: #fff; }
.msg.bot .who { background: var(--surface-2); }
.bubble { padding: 10px 14px; border-radius: 12px; background: var(--surface-2); font-size: 13.5px; }
.msg.user .bubble { background: var(--primary); color: #fff; }
.chat-input { border-top: 1px solid var(--border); padding: 12px; display: flex; gap: 8px; }
.suggest { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-top: 16px; }
.suggest button { text-align: left; padding: 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface); color: var(--text); font-size: 13px; }
.suggest button:hover { border-color: var(--primary); background: var(--surface-2); }

/* ---------- KPI ---------- */
.kpi { padding: 14px; }
.kpi .l { font-size: 12px; color: var(--muted); }
.kpi .v { font-size: 17px; font-weight: 700; margin-top: 3px; }
.kpi .h { font-size: 11.5px; color: var(--muted); margin-top: 2px; }

/* ---------- Tabs ---------- */
.tabs { display: inline-flex; background: var(--surface-2); border-radius: 10px; padding: 4px; gap: 4px; }
.tabs button { border: none; background: transparent; color: var(--muted); padding: 7px 16px; border-radius: 7px; font-weight: 500; font-size: 13.5px; display: inline-flex; align-items: center; gap: 6px; }
.tabs button.active { background: var(--surface); color: var(--text); box-shadow: var(--shadow); }
.tabs button svg { width: 15px; height: 15px; }

.info-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.info-grid .l { font-size: 12px; color: var(--muted); }
.info-grid .v { font-weight: 500; margin-top: 2px; }

.hamb { display: none; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .g-5 { grid-template-columns: repeat(3, 1fr); }
  .g-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 860px) {
  .sidebar { transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: none; }
  .main { margin-left: 0; }
  .hamb { display: inline-flex; }
  .g-5, .g-4, .g-3, .g-2 { grid-template-columns: 1fr; }
  .info-grid { grid-template-columns: 1fr 1fr; }
  .suggest { grid-template-columns: 1fr; }
  .breadcrumb { display: none; }
  .backdrop { position: fixed; inset: 0; background: rgba(2,6,23,.5); z-index: 35; }
}
@media (max-width: 560px) {
  .content { padding: 14px; }
  .user-name { display: none; }
}