/* ==========================================================================
   AFibWatch - Core Stylesheet
   Design Concept: Modern + Medical + AI + Futuristic + Clean
   CodeIgniter 3 Migration Ready: assets/css/style.css
   ========================================================================== */

:root {
  /* Color Palette */
  --primary-50: #f0fdfa;
  --primary-100: #ccfbf1;
  --primary-500: #14b8a6;
  --primary-600: #0d9488;
  --primary-700: #0f766e;
  --primary-800: #115e59;
  
  --secondary-50: #f0f9ff;
  --secondary-500: #0ea5e9;
  --secondary-600: #0284c7;
  --secondary-700: #0369a1;

  --accent-red: #ef4444;
  --accent-amber: #f59e0b;
  --accent-emerald: #10b981;
  --accent-indigo: #6366f1;

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

  /* Elevation & Shadows */
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
  --shadow-glow: 0 8px 25px rgba(13, 148, 136, 0.25);
  --shadow-danger-glow: 0 8px 25px rgba(239, 68, 68, 0.25);

  /* Geometry & Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Typography */
  --font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --transition-normal: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s ease-in-out;
}

/* Reset & Global Defaults */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  background-color: var(--neutral-50);
  color: var(--neutral-800);
  line-height: 1.6;
  font-size: 15px;
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--primary-600);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--primary-700);
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--neutral-900);
  font-weight: 700;
  line-height: 1.25;
}

/* Layout Containers */
.app-container {
  display: flex;
  min-height: 100vh;
  position: relative;
}

.main-content {
  flex: 1;
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding-bottom: 80px; /* Space for mobile nav */
}

/* Header & Typography Helpers */
.page-header {
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.page-title {
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--neutral-900);
  letter-spacing: -0.02em;
}

.page-subtitle {
  color: var(--neutral-500);
  font-size: 0.95rem;
  margin-top: 4px;
}

/* Medical Status Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.badge-success {
  background: rgba(16, 185, 129, 0.12);
  color: #047857;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.badge-warning {
  background: rgba(245, 158, 11, 0.12);
  color: #b45309;
  border: 1px solid rgba(245, 158, 11, 0.25);
}

.badge-danger {
  background: rgba(239, 68, 68, 0.12);
  color: #b91c1c;
  border: 1px solid rgba(239, 68, 68, 0.25);
}

.badge-info {
  background: rgba(14, 165, 233, 0.12);
  color: #0369a1;
  border: 1px solid rgba(14, 165, 233, 0.25);
}

/* Pulsing Live Indicator */
.pulse-indicator {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--accent-red);
}

.pulse-dot {
  width: 10px;
  height: 10px;
  background-color: var(--accent-red);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
  animation: pulse-ring 1.6s infinite cubic-bezier(0.66, 0, 0, 1);
}

@keyframes pulse-ring {
  to {
    box-shadow: 0 0 0 10px rgba(239, 68, 68, 0);
  }
}

/* Utility Grid Systems */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; gap: 16px; }
}

/* Glassmorphism & Card Containers */
.card {
  background: #ffffff;
  border-radius: var(--radius-xl);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(226, 232, 240, 0.8);
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--neutral-900);
  display: flex;
  align-items: center;
  gap: 10px;
}

.card-title i {
  color: var(--primary-600);
}

/* Medical Disclaimer Banner */
.medical-disclaimer {
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  margin-top: 16px;
  font-size: 0.82rem;
  color: #92400e;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.medical-disclaimer i {
  font-size: 1.1rem;
  margin-top: 2px;
  color: var(--accent-amber);
}