/* =============================================================
   TANDTC THA Management - Design Tokens & Shared Components
   Style: Trust & Authority + Data-Dense Dashboard
   ============================================================= */

:root {
  /* Brand */
  --c-primary:        #1E3A8A;
  --c-primary-700:    #1E40AF;
  --c-primary-50:     #EEF2FF;
  --c-accent:         #B45309;   /* trust gold for CTA */
  --c-accent-50:      #FEF3C7;

  /* Surfaces */
  --c-bg:             #F1F5F9;   /* page background */
  --c-surface:        #FFFFFF;   /* cards */
  --c-surface-2:      #F8FAFC;   /* subtle */
  --c-border:         #E2E8F0;
  --c-border-strong:  #CBD5E1;

  /* Text */
  --c-text:           #0F172A;
  --c-text-muted:     #475569;
  --c-text-soft:      #64748B;
  --c-text-disabled:  #94A3B8;

  /* Semantic — alert levels (matches PRD §FR-04) */
  --c-info:           #3B82F6;   /* blue */
  --c-info-50:        #EFF6FF;
  --c-warning:        #F59E0B;   /* amber */
  --c-warning-50:     #FEF3C7;
  --c-danger:         #EA580C;   /* orange */
  --c-danger-50:      #FFEDD5;
  --c-critical:       #DC2626;   /* red */
  --c-critical-50:    #FEE2E2;
  --c-success:        #16A34A;
  --c-success-50:     #DCFCE7;

  /* Layout */
  --sidebar-w:        260px;
  --topbar-h:         64px;
  --radius-sm:        6px;
  --radius:           10px;
  --radius-lg:        14px;
  --shadow-sm:        0 1px 2px rgba(15,23,42,.04), 0 1px 1px rgba(15,23,42,.03);
  --shadow:           0 4px 12px -2px rgba(15,23,42,.08), 0 2px 4px -2px rgba(15,23,42,.04);
  --shadow-lg:        0 12px 32px -8px rgba(15,23,42,.12), 0 4px 8px -4px rgba(15,23,42,.04);

  /* Type */
  --font-display:     'Plus Jakarta Sans', 'Inter', system-ui, sans-serif;
  --font-ui:          'Inter', system-ui, sans-serif;
  --font-mono:        'JetBrains Mono', ui-monospace, monospace;
}

/* ============== Base ============== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-ui);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, h5 { font-family: var(--font-display); margin: 0; color: var(--c-text); letter-spacing: -0.01em; }
.font-mono { font-family: var(--font-mono); }
.font-display { font-family: var(--font-display); }

a { color: var(--c-primary-700); text-decoration: none; }
a:hover { text-decoration: underline; }

button { font-family: inherit; cursor: pointer; border: 0; background: none; }
input, select, textarea { font-family: inherit; font-size: 14px; }

/* ============== App Shell ============== */
.app {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: 100vh;
}

/* Sidebar */
.sidebar {
  background: var(--c-primary);
  color: #E0E7FF;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
}
.sidebar-brand {
  padding: 20px 20px 18px;
  display: flex;
  gap: 12px;
  align-items: center;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sidebar-brand .logo {
  width: 40px; height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, #FCD34D, #B45309);
  color: #1E3A8A;
  display: grid; place-items: center;
  font-weight: 800;
  font-family: var(--font-display);
  flex-shrink: 0;
}
.sidebar-brand .name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: #fff;
  line-height: 1.25;
}
.sidebar-brand .org {
  font-size: 11px;
  color: rgba(255,255,255,.65);
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sidebar-section {
  padding: 16px 12px 4px;
}
.sidebar-section-title {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,.45);
  padding: 0 12px 8px;
}
.sidebar-nav { list-style: none; padding: 0; margin: 0; }
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  color: rgba(255,255,255,.78);
  font-size: 13.5px;
  font-weight: 500;
  text-decoration: none;
  position: relative;
  transition: background .15s, color .15s;
}
.sidebar-nav a:hover {
  background: rgba(255,255,255,.06);
  color: #fff;
  text-decoration: none;
}
.sidebar-nav a.active {
  background: rgba(252,211,77,.12);
  color: #FFFFFF;
}
.sidebar-nav a.active::before {
  content: '';
  position: absolute; left: -12px; top: 8px; bottom: 8px;
  width: 3px; border-radius: 0 3px 3px 0;
  background: #FCD34D;
}
.sidebar-nav .badge-pill {
  margin-left: auto;
  background: rgba(220,38,38,.85);
  color: #fff;
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: 999px;
  font-weight: 600;
}
.sidebar-nav i { width: 18px; height: 18px; flex-shrink: 0; opacity: .9; }

/* Vùng menu cuộn được — để chân sidebar (nút đăng xuất) luôn hiển thị */
.sidebar-scroll {
  flex: 1 1 auto;
  overflow-y: auto;
  min-height: 0;
}
.sidebar-foot {
  margin-top: 0;
  flex-shrink: 0;
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex; flex-direction: column; gap: 10px;
}
.sidebar-foot .sidebar-user { display: flex; align-items: center; gap: 10px; }
.sidebar-foot .avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: linear-gradient(135deg, #60A5FA, #1E40AF);
  display: grid; place-items: center;
  color: #fff; font-weight: 600; font-size: 13px;
}
.sidebar-foot .who { font-size: 12.5px; color: #fff; font-weight: 600; }
.sidebar-foot .role { font-size: 11px; color: rgba(255,255,255,.6); }
.sidebar-logout-btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%;
  padding: 9px 12px;
  border-radius: 8px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.22);
  color: #fff;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  transition: background .15s, border-color .15s;
}
.sidebar-logout-btn:hover { background: #DC2626; border-color: #DC2626; }
.sidebar-logout-btn i { width: 16px; height: 16px; }

/* Main */
.main {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

/* Topbar */
.topbar {
  height: var(--topbar-h);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
  position: sticky; top: 0; z-index: 30;
}
.topbar-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 16px;
  color: var(--c-text);
}
.topbar-crumbs {
  font-size: 12.5px;
  color: var(--c-text-soft);
  margin-top: 1px;
}
.topbar-search {
  flex: 1;
  max-width: 480px;
  position: relative;
}
.topbar-search input {
  width: 100%;
  height: 38px;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 0 12px 0 38px;
  background: var(--c-surface-2);
  outline: none;
  transition: border .15s, box-shadow .15s;
}
.topbar-search input:focus {
  border-color: var(--c-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(30,58,138,.10);
}
/* lucide.createIcons() THAY <i data-lucide> bằng <svg> → selector phải bắt cả 2,
   nếu không icon rơi về luồng thường và đẩy ô input xuống dòng (lệch topbar). */
.topbar-search i, .topbar-search svg {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  color: var(--c-text-soft);
  width: 16px; height: 16px;
  pointer-events: none;   /* icon đè lên input → bấm vào icon vẫn focus được ô tìm kiếm */
}
.topbar-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.topbar-icon-btn {
  position: relative;
  width: 38px; height: 38px;
  border-radius: 8px;
  display: grid; place-items: center;
  color: var(--c-text-muted);
  transition: background .15s, color .15s;
  cursor: pointer;
}
.topbar-icon-btn:hover { background: var(--c-surface-2); color: var(--c-primary); }
.topbar-icon-btn .dot {
  position: absolute; top: 9px; right: 10px;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--c-critical);
  border: 2px solid #fff;
}

/* Content */
.content {
  padding: 24px;
  max-width: 1600px;
  width: 100%;
}

/* ============== Reusable: Card ============== */
.card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.card-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14.5px;
  color: var(--c-text);
}
.card-subtitle {
  font-size: 12px;
  color: var(--c-text-soft);
  margin-top: 2px;
}
.card-actions { margin-left: auto; display: flex; gap: 8px; }
.card-body { padding: 18px; }
.card-flat { box-shadow: none; }

/* ============== Buttons ============== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 38px;
  padding: 0 14px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background .15s, border .15s, transform .05s;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn i { width: 16px; height: 16px; }
.btn-sm { height: 32px; padding: 0 10px; font-size: 12.5px; }
.btn-xs { height: 26px; padding: 0 8px; font-size: 11.5px; gap: 4px; }
.btn-lg { height: 44px; padding: 0 18px; font-size: 14.5px; }

.btn-primary { background: var(--c-primary); color: #fff; }
.btn-primary:hover { background: var(--c-primary-700); }
.btn-accent { background: var(--c-accent); color: #fff; }
.btn-accent:hover { background: #92400E; }
.btn-outline { background: #fff; border-color: var(--c-border-strong); color: var(--c-text); }
.btn-outline:hover { border-color: var(--c-primary); color: var(--c-primary); }
.btn-ghost { color: var(--c-text-muted); }
.btn-ghost:hover { background: var(--c-surface-2); color: var(--c-primary); }
.btn-danger { background: var(--c-critical); color: #fff; }
.btn-danger:hover { background: #B91C1C; }
.btn-success { background: var(--c-success); color: #fff; }
.btn-success:hover { background: #15803D; }

/* ============== Badges & Pills ============== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 22px;
  padding: 0 8px;
  border-radius: 999px;
  font-size: 11.5px;
  font-weight: 600;
  white-space: nowrap;
  border: 1px solid transparent;
}
.badge i { width: 12px; height: 12px; }
.badge-info     { background: var(--c-info-50);     color: #1D4ED8; border-color: #BFDBFE; }
.badge-warning  { background: var(--c-warning-50);  color: #92400E; border-color: #FDE68A; }
.badge-danger   { background: var(--c-danger-50);   color: #9A3412; border-color: #FED7AA; }
.badge-critical { background: var(--c-critical-50); color: #991B1B; border-color: #FCA5A5; }
.badge-success  { background: var(--c-success-50);  color: #166534; border-color: #BBF7D0; }
.badge-muted    { background: #F1F5F9;              color: #475569; border-color: #E2E8F0; }
.badge-primary  { background: var(--c-primary-50);  color: var(--c-primary); border-color: #C7D2FE; }

.badge-dot::before {
  content: '';
  width: 6px; height: 6px; border-radius: 50%;
  background: currentColor;
  display: inline-block;
}

/* ============== Inputs ============== */
.field { display: flex; flex-direction: column; gap: 6px; }
.field-label {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--c-text);
}
.field-label .req { color: var(--c-critical); margin-left: 2px; }
.field-hint {
  font-size: 11.5px;
  color: var(--c-text-soft);
}
.input, .select, .textarea {
  width: 100%;
  height: 40px;
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 0 12px;
  background: #fff;
  outline: none;
  font-size: 13.5px;
  color: var(--c-text);
  transition: border .15s, box-shadow .15s;
}
.textarea { height: auto; padding: 10px 12px; resize: vertical; line-height: 1.55; }
.input:focus, .select:focus, .textarea:focus {
  border-color: var(--c-primary);
  box-shadow: 0 0 0 3px rgba(30,58,138,.10);
}
.input[disabled], .select[disabled], .textarea[disabled] {
  background: var(--c-surface-2);
  color: var(--c-text-disabled);
  cursor: not-allowed;
}
.checkbox, .radio {
  width: 16px; height: 16px;
  accent-color: var(--c-primary);
  cursor: pointer;
}

/* ============== Tables ============== */
.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13.5px;
}
.table thead th {
  background: var(--c-surface-2);
  text-align: left;
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-text-muted);
  padding: 11px 14px;
  border-bottom: 0;
  box-shadow: inset 0 -1px 0 var(--c-border);
  position: sticky; top: 0;
  z-index: 3;
}
.table tbody td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--c-border);
  color: var(--c-text);
  vertical-align: middle;
}
.table tbody tr { transition: background .12s; cursor: pointer; }
.table tbody tr:hover { background: #F8FAFC; }
.table tbody tr:last-child td { border-bottom: 0; }
.table .num { font-family: var(--font-mono); font-size: 12.5px; }
.table-compact tbody td { padding: 8px 12px; }
.col-action { width: 1px; white-space: nowrap; }

/* ============== KPI Card ============== */
.kpi {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  position: relative;
  overflow: hidden;
}
.kpi-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.kpi-value {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--c-text);
  line-height: 1.1;
  letter-spacing: -0.02em;
}
.kpi-delta {
  font-size: 12px;
  display: inline-flex; align-items: center; gap: 4px;
  font-weight: 600;
}
.kpi-delta.up { color: var(--c-critical); }
.kpi-delta.down { color: var(--c-success); }
.kpi-delta.flat { color: var(--c-text-soft); }
.kpi-icon {
  position: absolute; top: 14px; right: 14px;
  width: 36px; height: 36px;
  border-radius: 10px;
  display: grid; place-items: center;
  background: var(--c-primary-50);
  color: var(--c-primary);
}
.kpi.critical { border-color: #FCA5A5; background: linear-gradient(180deg, #FEF2F2, #fff 60%); }
.kpi.critical .kpi-icon { background: var(--c-critical-50); color: var(--c-critical); }
.kpi.danger { border-color: #FED7AA; background: linear-gradient(180deg, #FFF7ED, #fff 60%); }
.kpi.danger .kpi-icon { background: var(--c-danger-50); color: var(--c-danger); }
.kpi.warning { border-color: #FDE68A; background: linear-gradient(180deg, #FFFBEB, #fff 60%); }
.kpi.warning .kpi-icon { background: var(--c-warning-50); color: #92400E; }
.kpi.success .kpi-icon { background: var(--c-success-50); color: var(--c-success); }
.kpi.info .kpi-icon { background: var(--c-info-50); color: var(--c-info); }

/* ============== Tabs ============== */
.tabs {
  display: flex;
  gap: 4px;
  border-bottom: 1px solid var(--c-border);
  padding: 0 18px;
  background: var(--c-surface);
}
.tab {
  padding: 12px 14px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--c-text-muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: color .15s, border .15s;
}
.tab:hover { color: var(--c-primary); }
.tab.active {
  color: var(--c-primary);
  border-bottom-color: var(--c-primary);
}
.tab .count {
  font-size: 11px;
  background: var(--c-surface-2);
  color: var(--c-text-muted);
  padding: 1px 7px;
  border-radius: 999px;
  border: 1px solid var(--c-border);
}
.tab.active .count {
  background: var(--c-primary-50);
  color: var(--c-primary);
  border-color: #C7D2FE;
}

/* ============== SLA Timeline ============== */
.sla {
  display: flex;
  align-items: stretch;
  gap: 0;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: 14px;
  position: relative;
}
.sla-step {
  flex: 1;
  padding: 0 8px;
  text-align: center;
  position: relative;
}
.sla-step + .sla-step::before {
  content: '';
  position: absolute;
  top: 22px;
  left: -50%; right: 50%;
  height: 2px;
  background: var(--c-border);
}
.sla-step.done + .sla-step.done::before,
.sla-step.done + .sla-step.now::before { background: var(--c-success); }
.sla-step.now + .sla-step::before { background: var(--c-border); }
.sla-step.late + .sla-step::before,
.sla-step + .sla-step.late::before { background: var(--c-critical); }

.sla-marker {
  width: 44px; height: 44px;
  margin: 0 auto 8px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid var(--c-border);
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  color: var(--c-text-soft);
  position: relative;
  z-index: 1;
}
.sla-step.done .sla-marker { background: var(--c-success); border-color: var(--c-success); color: #fff; }
.sla-step.now .sla-marker { background: var(--c-warning); border-color: var(--c-warning); color: #fff; box-shadow: 0 0 0 4px rgba(245,158,11,.18); }
.sla-step.late .sla-marker { background: var(--c-critical); border-color: var(--c-critical); color: #fff; box-shadow: 0 0 0 4px rgba(220,38,38,.18); }
.sla-step.future .sla-marker { background: #fff; border-style: dashed; }
.sla-label { font-size: 11.5px; font-weight: 600; color: var(--c-text); }
.sla-date { font-family: var(--font-mono); font-size: 11px; color: var(--c-text-soft); margin-top: 2px; }

/* ============== Alert / Callout ============== */
.alert {
  display: flex;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid;
  font-size: 13px;
  align-items: flex-start;
}
.alert-icon {
  width: 18px; height: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}
.alert-title { font-weight: 600; }
.alert-info     { background: var(--c-info-50);     border-color: #BFDBFE; color: #1E3A8A; }
.alert-warning  { background: var(--c-warning-50);  border-color: #FDE68A; color: #78350F; }
.alert-danger   { background: var(--c-danger-50);   border-color: #FED7AA; color: #7C2D12; }
.alert-critical { background: var(--c-critical-50); border-color: #FCA5A5; color: #7F1D1D; }
.alert-success  { background: var(--c-success-50);  border-color: #BBF7D0; color: #14532D; }

/* ============== Avatar ============== */
.avatar {
  width: 32px; height: 32px;
  border-radius: 50%;
  display: inline-grid; place-items: center;
  font-weight: 600; font-size: 12px;
  color: #fff;
  background: linear-gradient(135deg, #60A5FA, #1E40AF);
  flex-shrink: 0;
}
.avatar-sm { width: 24px; height: 24px; font-size: 10.5px; }
.avatar-lg { width: 44px; height: 44px; font-size: 15px; }

/* ============== Misc ============== */
.divider { height: 1px; background: var(--c-border); margin: 16px 0; }
.muted { color: var(--c-text-muted); }
.soft  { color: var(--c-text-soft); }
.mono  { font-family: var(--font-mono); }
.clickable { cursor: pointer; }

.dot-status {
  width: 8px; height: 8px; border-radius: 50%; display: inline-block;
}
.dot-status.green { background: var(--c-success); }
.dot-status.amber { background: var(--c-warning); }
.dot-status.red   { background: var(--c-critical); }
.dot-status.blue  { background: var(--c-info); }
.dot-status.gray  { background: #94A3B8; }

/* Confidence bar (AI extraction) */
.conf-bar {
  height: 4px;
  border-radius: 999px;
  background: var(--c-border);
  overflow: hidden;
  width: 80px;
}
.conf-bar > span {
  display: block; height: 100%;
  background: var(--c-success);
  border-radius: 999px;
}
.conf-bar.warn > span { background: var(--c-warning); }
.conf-bar.bad > span { background: var(--c-critical); }

/* Drag-drop upload */
.dropzone {
  border: 2px dashed var(--c-border-strong);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  background: var(--c-surface-2);
  transition: border .15s, background .15s;
  cursor: pointer;
}
.dropzone:hover {
  border-color: var(--c-primary);
  background: var(--c-primary-50);
}
.dropzone i { width: 40px; height: 40px; color: var(--c-primary); }

/* Steps (vertical wizard) */
.steps { display: flex; flex-direction: column; gap: 0; }
.step {
  display: flex; gap: 14px;
  padding: 14px 0;
  position: relative;
}
.step + .step::before {
  content: '';
  position: absolute;
  left: 17px; top: -4px;
  width: 2px; height: 18px;
  background: var(--c-border);
}
.step.done + .step::before { background: var(--c-success); }
.step-num {
  width: 36px; height: 36px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: var(--c-surface-2);
  color: var(--c-text-muted);
  border: 2px solid var(--c-border);
  font-weight: 700;
  flex-shrink: 0;
}
.step.done .step-num { background: var(--c-success); color: #fff; border-color: var(--c-success); }
.step.now .step-num { background: var(--c-primary); color: #fff; border-color: var(--c-primary); box-shadow: 0 0 0 4px rgba(30,58,138,.15); }
.step-title { font-weight: 700; font-size: 14px; }
.step-desc { font-size: 12.5px; color: var(--c-text-soft); margin-top: 2px; }

/* ============== Utilities ============== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-6 { gap: 24px; }
.grid { display: grid; }
.w-full { width: 100%; }
.text-xs { font-size: 11.5px; }
.text-sm { font-size: 12.5px; }
.text-md { font-size: 13.5px; }
.text-lg { font-size: 16px; }
.text-xl { font-size: 18px; }
.text-2xl { font-size: 22px; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-muted { color: var(--c-text-muted); }
.text-soft  { color: var(--c-text-soft); }
.text-primary { color: var(--c-primary); }
.text-critical { color: var(--c-critical); }
.text-success { color: var(--c-success); }
.text-warning { color: #92400E; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }

/* Grid presets */
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 16px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 16px; }
.grid-6 { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 16px; }
@media (max-width: 1280px) { .grid-5, .grid-6 { grid-template-columns: repeat(3, minmax(0,1fr)); } .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 900px)  { .grid-3, .grid-4, .grid-5, .grid-6 { grid-template-columns: repeat(2, minmax(0,1fr)); } .grid-2 { grid-template-columns: 1fr; } }
@media (max-width: 720px)  { .grid-3, .grid-4, .grid-5, .grid-6, .grid-2 { grid-template-columns: 1fr; } }

/* Two-column layout (main + side) */
.cols-main {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 16px;
  align-items: start;
}
@media (max-width: 1180px) { .cols-main { grid-template-columns: 1fr; } }

/* Print-friendly: hide chrome */
.print-only { display: none; }

/* Focus visible (a11y) */
:focus-visible {
  outline: 2px solid var(--c-primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Scrollbar (subtle) */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: #CBD5E1; border-radius: 8px; border: 2px solid var(--c-bg); }
::-webkit-scrollbar-thumb:hover { background: #94A3B8; }

/* ============================================================
   Hộp thoại (modal) thay cho alert/confirm/prompt của trình duyệt
   Thiết kế trang nghiêm, dễ đọc — dùng chung toàn hệ thống.
   ============================================================ */
.tha-modal-overlay {
  position: fixed; inset: 0; z-index: 12000; /* trên cả modal tự chế (z-index:9999) */
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
  background: rgba(15, 23, 42, .48);
  -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px);
  opacity: 0; transition: opacity .18s ease;
}
.tha-modal-overlay.tha-open { opacity: 1; }

.tha-modal {
  width: 100%; max-width: 468px; max-height: 86vh;
  display: flex; flex-direction: column;
  background: var(--c-surface, #fff);
  border: 1px solid var(--c-border, #E2E8F0);
  border-radius: 16px;
  box-shadow: 0 28px 64px -16px rgba(15, 23, 42, .45), 0 8px 20px -8px rgba(15, 23, 42, .25);
  overflow: hidden;
  transform: translateY(10px) scale(.975);
  transition: transform .2s cubic-bezier(.16, 1, .3, 1);
}
.tha-modal-overlay.tha-open .tha-modal { transform: translateY(0) scale(1); }

.tha-modal-head {
  display: flex; align-items: flex-start; gap: 15px;
  padding: 26px 26px 4px;
}
.tha-modal-icon {
  flex: 0 0 auto; width: 46px; height: 46px; border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
}
.tha-modal-icon svg { width: 24px; height: 24px; }
.tha-modal-icon.tha-info    { background: #EFF6FF; color: var(--c-primary, #1E3A8A); }
.tha-modal-icon.tha-question{ background: #EEF2FF; color: var(--c-primary-700, #1E40AF); }
.tha-modal-icon.tha-success { background: #ECFDF5; color: var(--c-success, #16A34A); }
.tha-modal-icon.tha-warning { background: #FFFBEB; color: var(--c-warning, #B45309); }
.tha-modal-icon.tha-danger  { background: #FEF2F2; color: var(--c-critical, #DC2626); }

.tha-modal-texts { flex: 1 1 auto; min-width: 0; padding-top: 3px; }
.tha-modal-title {
  font-family: var(--font-display, 'Plus Jakarta Sans', sans-serif);
  font-size: 17px; font-weight: 700; line-height: 1.35;
  color: var(--c-text, #0F172A);
  letter-spacing: -.01em;
  margin-bottom: 6px;
}
.tha-modal-msg {
  font-family: var(--font-ui, 'Inter', sans-serif);
  font-size: 14px; line-height: 1.65;
  color: var(--c-text-muted, #475569);
  white-space: pre-wrap; word-break: break-word;
  overflow-y: auto; max-height: 48vh;
}

.tha-modal-input {
  margin: 16px 26px 0;
  padding: 11px 13px;
  font-family: var(--font-ui, 'Inter', sans-serif); font-size: 14px;
  color: var(--c-text, #0F172A);
  background: var(--c-bg, #F8FAFC);
  border: 1px solid var(--c-border, #CBD5E1); border-radius: 10px;
  outline: none; transition: border-color .15s, box-shadow .15s;
}
.tha-modal-input::placeholder { color: #94A3B8; }
.tha-modal-input:focus {
  border-color: var(--c-primary, #1E3A8A);
  box-shadow: 0 0 0 3px rgba(30, 58, 138, .14);
  background: #fff;
}
.tha-modal-textarea { resize: vertical; min-height: 88px; line-height: 1.55; }

.tha-modal-actions {
  display: flex; justify-content: flex-end; gap: 10px;
  padding: 22px 26px 24px;
}
.tha-modal-actions .btn { min-width: 96px; justify-content: center; }

@media (max-width: 480px) {
  .tha-modal-actions { flex-direction: column-reverse; }
  .tha-modal-actions .btn { width: 100%; }
}