/* ==========================================================================
   BIJU PATNAIK COLLEGE OF NURSING, SONEPUR
   Design System & Global Variables
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

:root {
  /* Color Palette - Medical Teal & Radiant Gold */
  --primary-50: #f0fdfa;
  --primary-100: #ccfbf1;
  --primary-200: #99f6e4;
  --primary-300: #5eead4;
  --primary-400: #2dd4bf;
  --primary-500: #0d9488;
  --primary-600: #0f766e;
  --primary-700: #0e4b52;
  --primary-800: #115e59;
  --primary-900: #134e4a;
  --primary-950: #042f2e;

  /* Accent Gold / Amber */
  --accent-50: #fffbeb;
  --accent-100: #fef3c7;
  --accent-200: #fde68a;
  --accent-300: #fcd34d;
  --accent-400: #fbbf24;
  --accent-500: #f59e0b;
  --accent-600: #d97706;
  --accent-700: #b45309;

  /* Neutrals - Light Theme */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --border-color: #e2e8f0;
  --border-subtle: #f1f5f9;

  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --text-inverse: #ffffff;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 10px 25px -3px rgba(14, 75, 82, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
  --shadow-xl: 0 20px 35px -5px rgba(14, 75, 82, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
  --shadow-glow: 0 0 25px rgba(13, 148, 136, 0.25);

  /* Typography */
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Transitions */
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-max: 1280px;
  --header-height: 80px;
  --topbar-height: 42px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
  --bg-primary: #070d14;
  --bg-secondary: #0c1622;
  --bg-tertiary: #132030;
  --bg-card: rgba(16, 28, 44, 0.7);
  --bg-glass: rgba(12, 22, 34, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.04);

  --text-primary: #f8fafc;
  --text-secondary: #cbd5e1;
  --text-muted: #94a3b8;
  --text-inverse: #070d14;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(45, 212, 191, 0.2);
}

/* ==========================================================================
   CSS Reset & Base Styles
   ========================================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  position: relative;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
  max-width: 100%;
}

p, h1, h2, h3, h4, h5, h6, span, a {
  overflow-wrap: break-word;
  word-wrap: break-word;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
}

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

a:hover {
  color: var(--primary-500);
}

ul, ol {
  list-style: none;
}

/* ==========================================================================
   Utility Classes & Layout Containers
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

@media (max-width: 480px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

.section-padding {
  padding-top: 4.5rem;
  padding-bottom: 4.5rem;
}

@media (max-width: 768px) {
  .section-padding {
    padding-top: 3rem;
    padding-bottom: 3rem;
  }
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.section-header {
  margin-bottom: 3.5rem;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: var(--primary-50);
  color: var(--primary-700);
  border: 1px solid var(--primary-200);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1rem;
}

[data-theme="dark"] .badge-tag {
  background: rgba(13, 148, 136, 0.15);
  color: var(--primary-300);
  border-color: rgba(45, 212, 191, 0.25);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.section-title span {
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-500) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

[data-theme="dark"] .section-title span {
  background: linear-gradient(135deg, var(--primary-300) 0%, var(--accent-300) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* ==========================================================================
   Buttons & Interactive Elements
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.75rem;
  font-size: 0.975rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-600) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(14, 75, 82, 0.25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14, 75, 82, 0.35);
}

.btn-accent {
  background: linear-gradient(135deg, var(--accent-600) 0%, var(--accent-500) 100%);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.25);
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--accent-500) 0%, var(--accent-400) 100%);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(217, 119, 6, 0.35);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border-color: var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-tertiary);
  border-color: var(--primary-400);
  color: var(--primary-700);
  transform: translateY(-2px);
}

[data-theme="dark"] .btn-secondary:hover {
  color: var(--primary-300);
}

.btn-outline {
  background: transparent;
  color: var(--primary-600);
  border-color: var(--primary-500);
}

.btn-outline:hover {
  background: var(--primary-50);
  color: var(--primary-800);
  transform: translateY(-2px);
}

[data-theme="dark"] .btn-outline {
  color: var(--primary-300);
  border-color: var(--primary-400);
}

[data-theme="dark"] .btn-outline:hover {
  background: rgba(13, 148, 136, 0.15);
  color: #ffffff;
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 1.1rem 2.25rem;
  font-size: 1.05rem;
  border-radius: var(--radius-lg);
}

@media (max-width: 480px) {
  .btn {
    white-space: normal;
    text-align: center;
    word-break: break-word;
  }
  .btn-lg {
    padding: 0.85rem 1.25rem;
    font-size: 0.95rem;
  }
}

/* Glassmorphism Card Style */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  border-color: var(--primary-300);
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

[data-theme="dark"] .glass-card:hover {
  border-color: rgba(45, 212, 191, 0.35);
  box-shadow: var(--shadow-glow);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(15px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.05); }
}

@keyframes marquee {
  0% { transform: translateX(0%); }
  100% { transform: translateX(-50%); }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-300);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-500);
}