/* =============================================================
   NUMBER - Professional Design System & Stylesheet (Zero Emoji)
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* Dark Theme (Default - High Contrast Modern Tech) */
  --bg-main: #0b0c10;
  --surface: #14161f;
  --surface-variant: #1c1f2e;
  --surface-hover: #24283b;
  --border: #292d3e;
  --border-focus: #6366f1;
  --border-light: rgba(255, 255, 255, 0.08);

  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --primary-dark: #4338ca;
  --primary-glow: rgba(99, 102, 241, 0.25);

  --secondary: #06b6d4;
  --secondary-hover: #0891b2;
  --secondary-glow: rgba(6, 182, 212, 0.25);

  --accent: #f59e0b;
  --success: #10b981;
  --success-glow: rgba(16, 185, 129, 0.25);
  --danger: #ef4444;
  --danger-glow: rgba(239, 68, 68, 0.25);
  --warning: #f59e0b;

  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-inverse: #0f172a;

  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px var(--primary-glow);

  --transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

[data-theme="light"] {
  --bg-main: #f8fafc;
  --surface: #ffffff;
  --surface-variant: #f1f5f9;
  --surface-hover: #e2e8f0;
  --border: #cbd5e1;
  --border-focus: #6366f1;
  --border-light: rgba(0, 0, 0, 0.06);

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --text-inverse: #ffffff;

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px -4px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 36px -6px rgba(15, 23, 42, 0.12);
}

/* -------------------------------------------------------------
   GLOBAL BASE STYLES
   ------------------------------------------------------------- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.mono {
  font-family: 'JetBrains Mono', monospace;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem;
}

/* SVG Icon Helper Style */
.svg-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.svg-icon svg {
  display: block;
}

/* -------------------------------------------------------------
   NAVBAR & MOBILE DRAWER
   ------------------------------------------------------------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(11, 12, 16, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

[data-theme="light"] .navbar {
  background-color: rgba(255, 255, 255, 0.92);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 800;
  font-size: 1.3rem;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.logo-badge {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-weight: 900;
  font-size: 1.2rem;
  box-shadow: 0 4px 16px -2px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-primary);
  background-color: var(--surface-variant);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.28);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}

.theme-toggle-btn {
  background: var(--surface-variant);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.theme-toggle-btn:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}

.hamburger-btn {
  display: none;
  background: var(--surface-variant);
  border: 1px solid var(--border);
  color: var(--text-primary);
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.hamburger-btn:hover {
  border-color: var(--primary);
}

/* Backdrop for Mobile Nav Drawer */
.mobile-nav-backdrop {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 998;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.mobile-nav-backdrop.active {
  display: block;
  opacity: 1;
}

/* -------------------------------------------------------------
   ANNOUNCEMENT / BROADCAST BANNER
   ------------------------------------------------------------- */
#broadcast-banner-container {
  margin-bottom: 1.25rem;
}

.broadcast-banner {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(99, 102, 241, 0.35);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(6, 182, 212, 0.08));
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  box-shadow: var(--shadow-sm);
  animation: slideDown 0.35s ease forwards;
}

.broadcast-banner.banner-warning {
  border-color: rgba(245, 158, 11, 0.4);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.15), rgba(239, 68, 68, 0.08));
}

.broadcast-banner.banner-success {
  border-color: rgba(16, 185, 129, 0.4);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.15), rgba(6, 182, 212, 0.08));
}

.broadcast-banner.banner-danger {
  border-color: rgba(239, 68, 68, 0.4);
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.15), rgba(245, 158, 11, 0.08));
}

/* -------------------------------------------------------------
   BUTTONS & FORM CONTROLS
   ------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: var(--transition);
  user-select: none;
  min-height: 42px;
}

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

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 4px 14px -2px var(--primary-glow);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-hover), var(--primary));
  box-shadow: 0 6px 20px -2px var(--primary-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--secondary), var(--secondary-hover));
  color: #ffffff;
  box-shadow: 0 4px 14px -2px var(--secondary-glow);
}

.btn-secondary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px -2px var(--secondary-glow);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-outline:hover {
  background-color: var(--surface-variant);
  border-color: var(--border-focus);
}

.btn-danger {
  background: linear-gradient(135deg, var(--danger), #dc2626);
  color: #ffffff;
  box-shadow: 0 4px 14px -2px var(--danger-glow);
}

.btn-danger:hover {
  box-shadow: 0 6px 20px -2px var(--danger-glow);
}

.btn-success {
  background: linear-gradient(135deg, var(--success), #059669);
  color: #ffffff;
  box-shadow: 0 4px 14px -2px var(--success-glow);
}

.btn-sm {
  padding: 0.45rem 0.85rem;
  font-size: 0.82rem;
  min-height: 36px;
  border-radius: var(--radius-xs);
}

.btn-full {
  width: 100%;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

/* Inputs & Form Controls */
.form-group {
  margin-bottom: 1.15rem;
}

.form-label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  letter-spacing: 0.01em;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background-color: var(--surface-variant);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background-color: var(--surface);
}

select.form-control {
  cursor: pointer;
}

/* -------------------------------------------------------------
   CARDS & CONTAINERS
   ------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  border-color: rgba(99, 102, 241, 0.3);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
  gap: 0.75rem;
}

.card-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

/* Grid Layouts */
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}

/* -------------------------------------------------------------
   KPI / STATS CARDS (Owner & Metrics)
   ------------------------------------------------------------- */
.stat-kpi-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.stat-kpi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

.stat-kpi-card:hover {
  transform: translateY(-2px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: var(--shadow-md);
}

.stat-kpi-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.stat-kpi-label {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-kpi-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-xs);
  background: var(--surface-variant);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-kpi-val {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.stat-kpi-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 0.35rem;
}

/* -------------------------------------------------------------
   BADGES & PILLS
   ------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  border-radius: var(--radius-xs);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.badge-purple {
  background: rgba(99, 102, 241, 0.15);
  color: #818cf8;
  border: 1px solid rgba(99, 102, 241, 0.3);
}

.badge-cyan {
  background: rgba(6, 182, 212, 0.15);
  color: #22d3ee;
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.badge-success {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

/* -------------------------------------------------------------
   NUMBER & OTP DISPLAY BOXES
   ------------------------------------------------------------- */
.number-item-card {
  background: var(--surface-variant);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 1.15rem;
  margin-bottom: 0.85rem;
  transition: var(--transition);
  animation: fadeIn 0.25s ease forwards;
}

.number-item-card:hover {
  border-color: var(--primary);
  background: var(--surface-hover);
}

.number-display-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
}

.number-digits {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--secondary);
  letter-spacing: 0.03em;
  word-break: break-all;
}

/* OTP Code Box */
.otp-box {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.06));
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: var(--radius-sm);
  padding: 1.15rem;
  margin: 0.75rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  box-shadow: 0 4px 16px -4px var(--primary-glow);
  animation: pulseGlow 2.5s infinite;
}

.otp-code {
  font-size: 1.85rem;
  font-weight: 900;
  color: #38bdf8;
  letter-spacing: 0.25em;
  line-height: 1.1;
  word-break: break-all;
}

/* -------------------------------------------------------------
   TABLES & RESPONSIVE DATA LISTS
   ------------------------------------------------------------- */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.88rem;
  white-space: nowrap;
}

.data-table th {
  background-color: var(--surface-variant);
  color: var(--text-secondary);
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}

.data-table tbody tr {
  transition: var(--transition);
}

.data-table tbody tr:hover {
  background-color: var(--surface-variant);
}

.data-table tbody tr:last-child td {
  border-bottom: none;
}

/* -------------------------------------------------------------
   TOAST NOTIFICATIONS (Animated Spring System)
   ------------------------------------------------------------- */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  pointer-events: none;
  max-width: calc(100vw - 32px);
}

.toast {
  background: var(--surface);
  color: var(--text-primary);
  border: 1px solid var(--border);
  padding: 0.85rem 1.15rem;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  font-weight: 600;
  pointer-events: auto;
  min-width: 280px;
  max-width: 420px;
  animation: toastSpring 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  position: relative;
  overflow: hidden;
}

.toast::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  width: 100%;
  background: var(--primary);
  animation: toastTimer 3.5s linear forwards;
}

.toast-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.toast-success {
  border-color: rgba(16, 185, 129, 0.4);
}
.toast-success .toast-icon {
  background: rgba(16, 185, 129, 0.18);
  color: var(--success);
}
.toast-success::after {
  background: var(--success);
}

.toast-error {
  border-color: rgba(239, 68, 68, 0.4);
  animation: toastSpring 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards, shake 0.4s ease;
}
.toast-error .toast-icon {
  background: rgba(239, 68, 68, 0.18);
  color: var(--danger);
}
.toast-error::after {
  background: var(--danger);
}

.toast-info {
  border-color: rgba(6, 182, 212, 0.4);
}
.toast-info .toast-icon {
  background: rgba(6, 182, 212, 0.18);
  color: var(--secondary);
}
.toast-info::after {
  background: var(--secondary);
}

.toast-warning {
  border-color: rgba(245, 158, 11, 0.4);
}
.toast-warning .toast-icon {
  background: rgba(245, 158, 11, 0.18);
  color: var(--warning);
}
.toast-warning::after {
  background: var(--warning);
}

/* -------------------------------------------------------------
   MODAL DIALOG
   ------------------------------------------------------------- */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
}

.modal-overlay.active {
  display: flex;
}

.modal-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 600px;
  padding: 1.75rem;
  max-height: 88vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalScale 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* -------------------------------------------------------------
   PROGRESS BAR & METER
   ------------------------------------------------------------- */
.progress-bar-wrap {
  width: 100%;
  height: 8px;
  background: var(--surface-variant);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-top: 0.35rem;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: var(--radius-full);
  transition: width 0.5s ease;
}

/* -------------------------------------------------------------
   HERO SECTION
   ------------------------------------------------------------- */
.hero-section {
  text-align: center;
  padding: 3.5rem 1rem 2.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: var(--primary);
  font-size: 0.85rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.hero-title {
  font-size: 2.85rem;
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.15;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, #ffffff 40%, var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #0f172a 40%, var(--primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 2rem;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 0.85rem;
  flex-wrap: wrap;
}

/* -------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-top: auto;
  background-color: var(--surface);
}

/* -------------------------------------------------------------
   ANIMATIONS & KEYFRAMES
   ------------------------------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastSpring {
  from { opacity: 0; transform: translateY(20px) scale(0.95); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes modalScale {
  from { transform: scale(0.94); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

@keyframes pulseGlow {
  0%, 100% { box-shadow: 0 0 12px rgba(99, 102, 241, 0.15); }
  50% { box-shadow: 0 0 24px rgba(99, 102, 241, 0.35); }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

@keyframes toastTimer {
  from { width: 100%; }
  to { width: 0%; }
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

/* -------------------------------------------------------------
   RESPONSIVE (Mobile Polish & Fixed Navigation)
   ------------------------------------------------------------- */
@media (max-width: 900px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.1rem;
  }

  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  /* Hamburger and Mobile Drawer */
  .hamburger-btn {
    display: flex;
  }

  .nav-links {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: 1.25rem;
    gap: 0.5rem;
    z-index: 999;
    box-shadow: var(--shadow-lg);
    animation: slideDown 0.25s ease forwards;
  }

  .nav-links.active {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
  }

  #toast-container {
    left: 16px;
    right: 16px;
    bottom: 16px;
    min-width: unset;
  }

  .toast {
    min-width: 100%;
  }

  .card {
    padding: 1.2rem;
  }

  .otp-code {
    font-size: 1.5rem;
  }

  /* Mobile Responsive Table to Card adjustments */
  .data-table th, .data-table td {
    padding: 0.65rem 0.75rem;
  }
}