/* ============================================================
   CONCIERGE PORTAL — DESIGN SYSTEM
   Font: Saira | Base unit: 8px | Radius: 16px
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Saira:wght@400;500;600;700&display=swap');

/* ── 1. DESIGN TOKENS ─────────────────────────────────────── */
:root {
  /* Primary — #4361ee with full shade scale */
  --color-primary-50:  #eef1fd;
  --color-primary-100: #dde4fb;
  --color-primary-200: #b9c7f6;
  --color-primary-300: #96a9f2;
  --color-primary-400: #728ced;
  --color-primary-500: #4361ee;   /* brand primary */
  --color-primary-600: #2e4dd6;
  --color-primary-700: #2339b3;
  --color-primary-800: #1b2c8a;
  --color-primary-900: #141f62;

  /* Neutral — slate scale */
  --color-neutral-50:  #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;

  /* Semantic */
  --color-success:       #16a34a;
  --color-success-light: #dcfce7;
  --color-success-text:  #14532d;
  --color-warning:       #d97706;
  --color-warning-light: #fef3c7;
  --color-warning-text:  #78350f;
  --color-danger:        #dc2626;
  --color-danger-light:  #fee2e2;
  --color-danger-text:   #7f1d1d;
  --color-info:          #0284c7;
  --color-info-light:    #e0f2fe;
  --color-info-text:     #0c4a6e;

  /* Surfaces */
  --color-body-bg:   var(--color-neutral-50);
  --color-card-bg:   #ffffff;
  --color-sidebar-bg: var(--color-neutral-900);
  --color-sidebar-hover: var(--color-neutral-800);

  /* Text */
  --color-text-primary:   var(--color-neutral-800);
  --color-text-secondary: var(--color-neutral-500);
  --color-text-tertiary:  var(--color-neutral-400);
  --color-border:         var(--color-neutral-200);

  /* Aliases (for backwards compatibility with templates) */
  --primary-color:    var(--color-primary-500);
  --primary-hover:    var(--color-primary-600);
  --secondary-color:  var(--color-neutral-500);
  --success-color:    var(--color-success);
  --warning-color:    var(--color-warning);
  --danger-color:     var(--color-danger);
  --dark-bg:          var(--color-sidebar-bg);
  --dark-bg-hover:    var(--color-sidebar-hover);
  --body-bg:          var(--color-body-bg);
  --card-bg:          var(--color-card-bg);
  --text-primary:     var(--color-text-primary);
  --text-secondary:   var(--color-text-secondary);
  --border-color:     var(--color-border);

  /* Typography */
  --font-family-sans: 'Saira', system-ui, -apple-system, sans-serif;
  --font-size-xs:   0.75rem;     /* 12px */
  --font-size-sm:   0.875rem;    /* 14px */
  --font-size-base: 1rem;        /* 16px */
  --font-size-lg:   1.125rem;    /* 18px */
  --font-size-xl:   1.25rem;     /* 20px */
  --font-size-2xl:  1.5rem;      /* 24px */
  --font-size-3xl:  1.875rem;    /* 30px */
  --font-weight-regular:  400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;
  --line-height-tight:  1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  /* Spacing — 8px base grid */
  --space-1:  0.25rem;   /* 4px  */
  --space-2:  0.5rem;    /* 8px  */
  --space-3:  0.75rem;   /* 12px */
  --space-4:  1rem;      /* 16px */
  --space-5:  1.25rem;   /* 20px */
  --space-6:  1.5rem;    /* 24px */
  --space-8:  2rem;      /* 32px */
  --space-10: 2.5rem;    /* 40px */
  --space-12: 3rem;      /* 48px */
  --space-16: 4rem;      /* 64px */

  /* Border radius */
  --radius-sm:   0.5rem;    /* 8px  — inputs, small elements */
  --radius-md:   0.625rem;  /* 10px — buttons */
  --radius-lg:   1rem;      /* 16px — cards (primary) */
  --radius-xl:   1.25rem;   /* 20px — modals, large panels */
  --radius-pill: 9999px;    /* badges, pills */

  /* Shadows */
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.06), 0 1px 2px -1px rgb(0 0 0 / 0.04);
  --shadow-md: 0 4px 8px -2px rgb(0 0 0 / 0.08), 0 2px 4px -2px rgb(0 0 0 / 0.06);
  --shadow-lg: 0 12px 24px -4px rgb(0 0 0 / 0.10), 0 4px 8px -4px rgb(0 0 0 / 0.06);
  --shadow-primary: 0 4px 12px -2px rgb(67 97 238 / 0.30);

  /* Transitions */
  --transition-fast:   all 0.15s ease;
  --transition-base:   all 0.2s ease;
  --transition-slow:   all 0.3s ease;
}

/* ── 2. BASE ──────────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}

body {
  background-color: var(--color-body-bg);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);     /* 16px base */
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── 3. TYPOGRAPHY ────────────────────────────────────────── */
/* Scale: body 16px → h6 18px → h5 20px → h4 22px → h3 26px → h2 30px → h1 36px */
h1 { font-size: 2.25rem;   font-weight: var(--font-weight-bold);    line-height: 1.2;  letter-spacing: -0.025em; }
h2 { font-size: 1.875rem;  font-weight: var(--font-weight-bold);    line-height: 1.25; letter-spacing: -0.02em; }
h3 { font-size: 1.625rem;  font-weight: var(--font-weight-semibold); line-height: 1.3;  letter-spacing: -0.015em; }
h4 { font-size: 1.375rem;  font-weight: var(--font-weight-semibold); line-height: 1.35; letter-spacing: -0.01em; }
h5 { font-size: 1.25rem;   font-weight: var(--font-weight-semibold); line-height: 1.4; }
h6 { font-size: 1.125rem;  font-weight: var(--font-weight-semibold); line-height: 1.4; }

h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-primary);
  margin-bottom: 0;
}

p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.text-muted { color: var(--color-text-secondary) !important; }
.text-xs    { font-size: var(--font-size-xs)  !important; }
.text-sm    { font-size: var(--font-size-sm)  !important; }
.text-base  { font-size: var(--font-size-base) !important; }

/* ── 4. CARDS ─────────────────────────────────────────────── */
.card {
  background: var(--color-card-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
}

.card.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card.card-clickable {
  cursor: pointer;
}

.card.card-clickable:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-primary);
  border-color: var(--color-primary-300);
}

/* Stat card — dashboard metrics */
.stat-card {
  border: none;
  border-radius: var(--radius-lg);
  background: var(--color-card-bg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

/* ── 5. BUTTONS ───────────────────────────────────────────── */
.btn {
  font-family: var(--font-family-sans);
  font-size: 0.8125rem;               /* 13px — compact but readable */
  font-weight: var(--font-weight-semibold);
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  padding: 0.5625rem 1.125rem;
  line-height: 1.4;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  border-width: 1px;
  border-style: solid;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.97);
}

/* Primary */
.btn-primary {
  background-color: var(--color-primary-500);
  border-color: var(--color-primary-500);
  color: #fff;
}
.btn-primary:hover,
.btn-primary:focus {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
  color: #fff;
  box-shadow: var(--shadow-primary);
  transform: translateY(-1px);
}

/* Secondary (dark filled) */
.btn-dark, .btn-secondary-solid {
  background-color: var(--color-neutral-900);
  border-color: var(--color-neutral-900);
  color: #fff;
}
.btn-dark:hover,
.btn-secondary-solid:hover {
  background-color: var(--color-neutral-800);
  border-color: var(--color-neutral-800);
  color: #fff;
  box-shadow: 0 4px 8px -2px rgb(15 23 42 / 0.30);
  transform: translateY(-1px);
}

/* Ghost (outline) */
.btn-outline-dark, .btn-ghost {
  background-color: transparent;
  border-color: var(--color-neutral-300);
  color: var(--color-text-primary);
}
.btn-outline-dark:hover,
.btn-ghost:hover {
  background-color: var(--color-neutral-100);
  border-color: var(--color-neutral-400);
  color: var(--color-text-primary);
}

/* Ghost primary */
.btn-outline-primary {
  background-color: transparent;
  border-color: var(--color-primary-300);
  color: var(--color-primary-600);
}
.btn-outline-primary:hover {
  background-color: var(--color-primary-50);
  border-color: var(--color-primary-500);
  color: var(--color-primary-700);
}

/* Danger */
.btn-danger {
  background-color: var(--color-danger);
  border-color: var(--color-danger);
  color: #fff;
}
.btn-danger:hover {
  background-color: #b91c1c;
  border-color: #b91c1c;
  color: #fff;
  box-shadow: 0 4px 8px -2px rgb(220 38 38 / 0.30);
  transform: translateY(-1px);
}

.btn-outline-danger {
  background-color: transparent;
  border-color: var(--color-danger);
  color: var(--color-danger);
}
.btn-outline-danger:hover {
  background-color: var(--color-danger-light);
  border-color: var(--color-danger);
  color: var(--color-danger-text);
}

/* Sizes */
.btn-sm {
  font-size: var(--font-size-xs);
  padding: 0.3125rem 0.75rem;
}
.btn-lg {
  font-size: var(--font-size-base);
  padding: 0.6875rem 1.5rem;
}

/* Loading state */
.btn-loading {
  position: relative;
  color: transparent !important;
  pointer-events: none;
}
.btn-loading::after {
  content: '';
  position: absolute;
  width: 1rem;
  height: 1rem;
  top: calc(50% - 0.5rem);
  left: calc(50% - 0.5rem);
  border: 2px solid rgba(255,255,255,0.4);
  border-radius: var(--radius-pill);
  border-top-color: #fff;
  animation: spin 0.7s linear infinite;
}

/* ── 6. FORMS ─────────────────────────────────────────────── */
.form-control,
.form-select {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  background-color: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.75rem;
  transition: var(--transition-base);
  line-height: var(--line-height-normal);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 3px var(--color-primary-100);
  outline: none;
}

.form-control::placeholder {
  color: var(--color-text-tertiary);
}

.form-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
  display: block;
}

.form-text {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-1);
  line-height: var(--line-height-relaxed);
}

.form-check-input:checked {
  background-color: var(--color-primary-500);
  border-color: var(--color-primary-500);
}

.form-check-input:focus {
  border-color: var(--color-primary-400);
  box-shadow: 0 0 0 3px var(--color-primary-100);
}

/* ── 7. ALERTS ────────────────────────────────────────────── */
.alert {
  border-radius: var(--radius-lg);
  border-width: 1px;
  font-size: var(--font-size-sm);
}

.alert-success {
  background-color: var(--color-success-light);
  border-color: #bbf7d0;
  color: var(--color-success-text);
}
.alert-warning {
  background-color: var(--color-warning-light);
  border-color: #fde68a;
  color: var(--color-warning-text);
}
.alert-danger {
  background-color: var(--color-danger-light);
  border-color: #fecaca;
  color: var(--color-danger-text);
}
.alert-info {
  background-color: var(--color-info-light);
  border-color: #bae6fd;
  color: var(--color-info-text);
}

/* ── 8. BADGES ────────────────────────────────────────────── */
.badge {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-pill);
  padding: 0.25em 0.625em;
  letter-spacing: 0.01em;
}

/* ── 9. TABLES ────────────────────────────────────────────── */
.table {
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}
.table th {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}
.table-hover > tbody > tr:hover > td {
  background-color: var(--color-neutral-50);
}

/* ── 10. SIDEBAR ──────────────────────────────────────────── */
.sidebar {
  background: var(--color-sidebar-bg);
  color: #fff;
  width: 260px;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  padding-top: var(--space-6);
  box-shadow: 4px 0 12px rgb(0 0 0 / 0.08);
  z-index: 1050;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.sidebar.show {
  transform: translateX(0);
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgb(15 23 42 / 0.40);
  z-index: 1040;
  backdrop-filter: blur(2px);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.sidebar-overlay.show {
  display: block;
  opacity: 1;
}

.sidebar .brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  padding: 0 var(--space-6) var(--space-6);
  border-bottom: 1px solid rgb(255 255 255 / 0.06);
  color: #fff;
  display: flex;
  align-items: center;
}

.sidebar .brand i {
  color: var(--color-primary-400);
  background: rgb(67 97 238 / 0.15);
  padding: 6px;
  border-radius: var(--radius-sm);
  margin-right: var(--space-3) !important;
  font-size: 1rem;
}

.sidebar .nav-link {
  color: rgb(255 255 255 / 0.55);
  padding: 0.6875rem var(--space-6);
  border-radius: 0;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  position: relative;
  transition: var(--transition-fast);
  white-space: nowrap;
}

.sidebar .nav-item {
  margin-bottom: 0.125rem;
}

.sidebar .nav-link:hover {
  color: #fff;
  background: var(--color-sidebar-hover);
}

.sidebar .nav-link.active {
  color: #fff;
  background: var(--color-sidebar-hover);
}

.sidebar .nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--color-primary-400);
  border-radius: 0 3px 3px 0;
}

.sidebar .nav-link i {
  font-size: 1rem;
  width: 1.125rem;
  text-align: center;
  flex-shrink: 0;
  transition: transform 0.15s ease;
}

.sidebar .nav-link:hover i {
  transform: translateX(2px);
}

.balance-dot {
  display: inline-block;
  width: 7px; height: 7px;
  border-radius: var(--radius-pill);
  margin-left: auto;
  flex-shrink: 0;
}
.balance-dot-warning  { background: var(--color-warning); }
.balance-dot-critical { background: var(--color-danger); animation: pulse 1.5s ease-in-out infinite; }

/* ── 11. TOPBAR ───────────────────────────────────────────── */
.topbar {
  background: rgb(255 255 255 / 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
  margin-left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar .page-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

/* ── 12. LAYOUT ───────────────────────────────────────────── */
.main-content {
  margin-left: 0;
  padding: var(--space-6);
  background-color: var(--color-body-bg);
  min-height: 100vh;
}

@media (min-width: 992px) {
  .sidebar {
    transform: translateX(0);
  }
  .main-content {
    margin-left: 260px;
    padding: var(--space-10);
  }
  .topbar {
    margin-left: 260px;
    padding: var(--space-4) var(--space-10);
  }
  .sidebar-overlay {
    display: none !important;
  }
}

/* ── 13. SCROLLBAR ────────────────────────────────────────── */
.custom-scrollbar {
  flex-wrap: nowrap !important;
  white-space: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--space-2);
}
.custom-scrollbar::-webkit-scrollbar { height: 3px; }
.custom-scrollbar::-webkit-scrollbar-track { background: transparent; }
.custom-scrollbar::-webkit-scrollbar-thumb {
  background: var(--color-neutral-300);
  border-radius: var(--radius-pill);
}
.custom-scrollbar::-webkit-scrollbar-thumb:hover {
  background: var(--color-neutral-400);
}

/* ── 14. ANIMATIONS ───────────────────────────────────────── */
.fade-in {
  animation: fadeIn 0.35s ease-out forwards;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

/* ── 15. NAV TABS (Knowledge Base) ───────────────────────── */
.nav-tabs {
  border-bottom-color: var(--color-border);
  gap: 0.125rem;
}
.nav-tabs .nav-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  border: none;
  border-bottom: 2px solid transparent;
  padding: 0.5rem 0.875rem;
  border-radius: 0;
  transition: var(--transition-fast);
  white-space: nowrap;
}
.nav-tabs .nav-link:hover {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-neutral-300);
  background: transparent;
}
.nav-tabs .nav-link.active {
  color: var(--color-primary-600);
  border-bottom-color: var(--color-primary-500);
  background: transparent;
  font-weight: var(--font-weight-semibold);
}