/* ==========================================================================
   Carmel English Medium School - Main Stylesheet
   ========================================================================== */

/* Google Fonts Import */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700;800&display=swap');

/* ==========================================================================
   CSS Variables & Design System
   ========================================================================== */
:root {
  /* Colors - Light Theme (Default) */
  --c-primary: #0A192F;       /* Navy Blue */
  --c-primary-light: #172A45;
  --c-secondary: #D4AF37;     /* Gold */
  --c-secondary-hover: #F3C300;
  --c-accent: #E63946;        /* Subtle Red for alerts/important CTA */
  --c-bg: #F8F9FA;            /* Light Gray */
  --c-surface: #FFFFFF;       /* White */
  --c-text: #333333;          /* Dark Gray */
  --c-text-muted: #666666;
  --c-border: #E0E0E0;
  
  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Montserrat', sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 2rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 8rem;
  
  /* Layout */
  --container-width: 1200px;
  --header-height: 80px;
  
  /* Border Radius & Shadows */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
  --shadow-gold: 0 4px 15px rgba(212, 175, 55, 0.3);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode Theme Variables */
[data-theme="dark"] {
  --c-primary: #0A192F;
  --c-primary-light: #112240;
  --c-secondary: #D4AF37;
  --c-secondary-hover: #F3C300;
  --c-bg: #020C1B;
  --c-surface: #112240;
  --c-text: #E6F1FF;
  --c-text-muted: #8892B0;
  --c-border: #233554;
  
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.5);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  color: var(--c-text);
  background-color: var(--c-bg);
  line-height: 1.6;
  transition: background-color var(--transition-normal), color var(--transition-normal);
  overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--c-primary);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

[data-theme="dark"] h1, 
[data-theme="dark"] h2, 
[data-theme="dark"] h3, 
[data-theme="dark"] h4, 
[data-theme="dark"] h5, 
[data-theme="dark"] h6 {
  color: var(--c-text);
}

a {
  color: var(--c-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--c-secondary-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul {
  list-style: none;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section-padding {
  padding: var(--spacing-xl) 0;
}

@media (min-width: 768px) {
  .section-padding {
    padding: var(--spacing-xxl) 0;
  }
}

.text-center { text-align: center; }
.text-gold { color: var(--c-secondary); }
.text-navy { color: var(--c-primary); }

/* Section Titles */
.section-title {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--c-secondary);
  border-radius: var(--radius-sm);
}

.section-subtitle {
  color: var(--c-text-muted);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xl);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--c-primary);
  color: var(--c-surface);
}

.btn-primary:hover {
  background-color: var(--c-primary-light);
  color: var(--c-surface);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: var(--c-secondary);
  color: var(--c-primary);
}

.btn-secondary:hover {
  background-color: var(--c-secondary-hover);
  color: var(--c-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-gold);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--c-secondary);
  color: var(--c-secondary);
}

.btn-outline:hover {
  background-color: var(--c-secondary);
  color: var(--c-primary);
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: var(--c-surface);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all var(--transition-normal);
}

.header.scrolled {
  height: 70px;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

[data-theme="dark"] .header.scrolled {
  background-color: rgba(17, 34, 64, 0.95);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo-img {
  height: 50px;
  width: auto;
  transition: height var(--transition-normal);
}

.header.scrolled .logo-img {
  height: 40px;
}

.logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--c-primary);
  line-height: 1.1;
}

[data-theme="dark"] .logo-text {
  color: var(--c-text);
}

.logo-text span {
  display: block;
  font-size: 0.8rem;
  color: var(--c-secondary);
  font-weight: 500;
}

/* Navigation Menu */
.nav-menu {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  color: var(--c-text);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 5px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--c-secondary);
  transition: width var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link:hover,
.nav-link.active {
  color: var(--c-secondary);
}

/* Mobile Toggle */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--c-primary);
  cursor: pointer;
}

[data-theme="dark"] .mobile-toggle {
  color: var(--c-text);
}

/* Theme Toggle Button */
.theme-toggle {
  background: none;
  border: none;
  color: var(--c-text);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: background-color var(--transition-fast);
}

.theme-toggle:hover {
  background-color: var(--c-bg);
}

.theme-toggle .fa-sun { display: none; }
.theme-toggle .fa-moon { display: block; }

[data-theme="dark"] .theme-toggle .fa-sun { display: block; color: var(--c-secondary); }
[data-theme="dark"] .theme-toggle .fa-moon { display: none; }

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
  height: 100vh;
  min-height: 600px;
  position: relative;
  display: flex;
  align-items: center;
  margin-top: var(--header-height);
  background-color: var(--c-primary);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
  z-index: 1;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(10, 25, 47, 0.9) 0%, rgba(10, 25, 47, 0.4) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  color: var(--c-surface);
  max-width: 800px;
}

.hero-subtitle {
  color: var(--c-secondary);
  font-family: var(--font-heading);
  font-weight: 600;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--spacing-sm);
  display: block;
  animation: fadeInUp 1s ease 0.2s both;
}

.hero-title {
  color: var(--c-surface);
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-text {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.9;
  animation: fadeInUp 1s ease 0.6s both;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  animation: fadeInUp 1s ease 0.8s both;
}

/* ==========================================================================
   Components (Cards, Features, etc.)
   ========================================================================== */
/* Grid Layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-xl); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-md); }

/* Feature Cards */
.feature-card {
  background-color: var(--c-surface);
  padding: var(--spacing-xl) var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
  border-bottom: 4px solid transparent;
  height: 100%;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 0;
  background-color: rgba(212, 175, 55, 0.05);
  transition: height var(--transition-normal);
  z-index: 0;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-bottom-color: var(--c-secondary);
}

.feature-card:hover::before {
  height: 100%;
}

.feature-icon {
  font-size: 3rem;
  color: var(--c-secondary);
  margin-bottom: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.feature-card h3, .feature-card p {
  position: relative;
  z-index: 1;
}

/* Image with Content Box */
.content-box {
  background-color: var(--c-surface);
  padding: var(--spacing-xl);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.image-wrapper {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.image-wrapper:hover img {
  transform: scale(1.05);
}

/* Profiles/Faculty Cards */
.profile-card {
  background-color: var(--c-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-normal);
}

.profile-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.profile-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  background-color: var(--c-border);
}

.profile-info {
  padding: var(--spacing-md);
  text-align: center;
}

.profile-name {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--c-primary);
  margin-bottom: 5px;
}

[data-theme="dark"] .profile-name { color: var(--c-text); }

.profile-role {
  color: var(--c-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.profile-qual {
  font-size: 0.8rem;
  color: var(--c-text-muted);
  margin-top: 5px;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  background-color: var(--c-primary);
  color: var(--c-surface);
  padding: var(--spacing-xxl) 0 var(--spacing-md);
}

[data-theme="dark"] .footer {
  background-color: var(--c-primary-light);
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.footer-logo img {
  height: 60px;
  filter: brightness(0) invert(1);
}

.footer-logo-text {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.1;
}

.footer-logo-text span {
  display: block;
  font-size: 0.8rem;
  color: var(--c-secondary);
}

.footer-desc {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-md);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--c-surface);
  transition: all var(--transition-fast);
}

.social-link:hover {
  background-color: var(--c-secondary);
  color: var(--c-primary);
  transform: translateY(-3px);
}

.footer-title {
  color: var(--c-secondary);
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-links a:hover {
  color: var(--c-secondary);
  padding-left: 5px;
}

.footer-contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 15px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
  color: var(--c-secondary);
  margin-top: 5px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* ==========================================================================
   Floating Elements & Animations
   ========================================================================== */
.scroll-top, .whatsapp-float {
  position: fixed;
  right: 20px;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: all var(--transition-normal);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
}

.scroll-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top {
  bottom: 20px;
  background-color: var(--c-primary);
  border: none;
}

.scroll-top:hover {
  background-color: var(--c-secondary);
  color: var(--c-primary);
}

.whatsapp-float {
  bottom: 80px;
  background-color: #25D366;
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.whatsapp-float:hover {
  transform: scale(1.1);
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title { font-size: 2.5rem; }
  .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .mobile-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: var(--header-height);
    left: -100%;
    width: 100%;
    height: calc(100vh - var(--header-height));
    background-color: var(--c-surface);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: left var(--transition-normal);
  }
  .nav-menu.active { left: 0; }
  .header.scrolled .nav-menu { top: 70px; height: calc(100vh - 70px); }
  
  .grid-2 { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .hero-title { font-size: 2rem; }
  
  .section-title { font-size: 2rem; }
}