/* --- THEME DEFINITION USING CSS VARIABLES --- */
:root {
  /* This is the default LIGHT theme */
  --brand-color: #0ea5e9; /* Sky Blue */
  --brand-color-dark: #0284c7;
  --brand-gradient: linear-gradient(
    to right,
    var(--brand-color-dark) 0%,
    var(--brand-color) 100%
  );
  --bg-color: #f3f4f6; /* Fallback color */
  --text-color: #111827;
  --text-color-light: #6b7280;
  --bg-gradient-start: #ffffff;
  --bg-gradient-end: #e7eaf2;
  --card-shadow: 0 8px 16px rgba(101, 119, 134, 0.07);
  --card-shadow-hover: 0 10px 20px rgba(101, 119, 134, 0.12);
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: #ffffff;
  --input-bg: #ffffff;
  --input-border: #d1d5db;
  --placeholder-color: #9ca3af;
  --nav-text-color: #111827;
  --font-family-body: "Lato", sans-serif;
  --font-family-heading: "Montserrat", sans-serif;
}

[data-theme="dark"] {
  /* This is the DARK theme override */
  --brand-color: #38bdf8;
  --brand-color-dark: #0ea5e9;
  --bg-color: #020305; /* Fallback color */
  --text-color: #ffffff;
  --text-color-light: rgba(255, 255, 255, 0.7);
  --bg-gradient-start: #0b101b;
  --bg-gradient-end: #020305;
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.37);
  --card-shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.5);
  --glass-bg: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.15);
  --input-bg: rgba(0, 0, 0, 0.2);
  --input-border: var(--glass-border);
  --placeholder-color: rgba(255, 255, 255, 0.5);
  --nav-text-color: #ffffff;
}

/* --- GLOBAL STYLES --- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family-body);
  color: var(--text-color);
  background-color: var(--bg-gradient-end);
  background-image: radial-gradient(
      circle 1200px at 0% 0%,
      hsla(202, 90%, 55%, 0.1),
      transparent 40%
    ),
    radial-gradient(
      circle 800px at 100% 100%,
      hsla(202, 90%, 55%, 0.08),
      transparent 50%
    ),
    linear-gradient(to bottom, var(--bg-gradient-start), var(--bg-gradient-end));
  background-repeat: no-repeat;
  overflow-x: hidden;
  min-height: 100vh;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* --- HEADER & NAVIGATION --- */
.site-header {
  position: fixed;
  top: 1rem;
  left: 50%;
  transform: translateX(-50%);
  width: 95%;
  max-width: 1200px;
  z-index: 1000;
}
.header-content {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
  border-radius: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 1rem 0.5rem 1.5rem;
  height: 60px;
  transition: background-color 0.3s ease, border 0.3s ease;
}
.logo {
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--nav-text-color);
  text-decoration: none;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.main-nav a {
  color: var(--nav-text-color);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}
.main-nav a:hover {
  color: var(--brand-color);
}
.header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.theme-toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  font-size: 1.25rem;
  position: relative;
  display: flex;
  align-items: center;
  color: var(--nav-text-color);
}
.theme-toggle-btn .fa-sun,
.theme-toggle-btn .fa-moon {
  transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}
.theme-toggle-btn .fa-moon {
  position: absolute;
  transform: scale(0);
  opacity: 0;
}
[data-theme="dark"] .theme-toggle-btn .fa-sun {
  transform: scale(0);
  opacity: 0;
}
[data-theme="dark"] .theme-toggle-btn .fa-moon {
  transform: scale(1);
  opacity: 1;
}
.hamburger-btn {
  display: none;
  background: transparent;
  border: none;
  color: var(--nav-text-color);
  font-size: 1.5rem;
  cursor: pointer;
  z-index: 1002;
}
.mobile-nav-menu {
  display: none;
}

/* --- HERO SECTION --- */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 2rem;
  position: relative;
  overflow: hidden;
}
.hero-background-slider {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transition: background-image 1.5s ease-in-out;
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2;
}
.hero-content {
  max-width: 800px;
  position: relative;
  z-index: 3;
  color: #fff;
}
.hero-title {
  font-family: var(--font-family-heading);
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.hero-section .hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 2rem;
}
.cta-button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 15px 30px;
  border: none;
  border-radius: 8px;
  font-family: var(--font-family-body);
  font-size: 1.1rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s ease;
  color: white;
  background-image: var(--brand-gradient);
  background-size: 200% auto;
  box-shadow: 0 4px 15px hsla(202, 90%, 55%, 0.25);
}
.cta-button:hover {
  background-position: right center;
  transform: translateY(-3px);
  box-shadow: 0 8px 25px hsla(202, 90%, 55%, 0.4);
}
.cta-button i {
  margin-right: 0.75rem;
}

/* --- GENERIC SECTION STYLES --- */
.section {
  padding: 5rem 2rem;
}
.section-container {
  max-width: 1200px;
  margin: 0 auto;
}
.section-title {
  font-family: var(--font-family-heading);
  font-size: 2.8rem;
  text-align: center;
  margin-bottom: 1rem;
  color: var(--text-color);
}
.section-subtitle {
  font-size: 1.1rem;
  text-align: center;
  color: var(--text-color-light);
  margin-bottom: 3rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* --- FACILITIES SECTION --- */
.facilities-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.facility-card {
  background-color: var(--glass-bg);
  backdrop-filter: blur(5px);
  padding: 2.5rem 2rem;
  border-radius: 16px;
  text-align: center;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--glass-border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.facility-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--card-shadow-hover);
}
.facility-card i {
  font-size: 3rem;
  color: var(--brand-color);
  margin-bottom: 1.5rem;
}
.facility-card h4 {
  font-family: var(--font-family-heading);
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  color: var(--text-color);
}
.facility-card p {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-color-light);
}

/* --- TOPPERS SECTION --- */
.toppers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}
.topper-card {
  background-color: var(--glass-bg);
  border-radius: 16px;
  border: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
  text-align: center;
  padding: 1.5rem;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.topper-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--card-shadow-hover);
}
.topper-image {
  width: 120px;
  height: 120px;
  margin: 0 auto 1rem auto;
  border-radius: 50%;
  border: 4px solid var(--brand-color);
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}
.topper-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.topper-name {
  font-family: var(--font-family-heading);
  font-size: 1.5rem;
  color: var(--text-color);
  margin: 0;
}
.topper-achievement {
  color: var(--brand-color);
  font-weight: 600;
  font-size: 1rem;
  margin-top: 0.25rem;
}
.topper-year {
  position: absolute;
  top: 1rem;
  right: -1.5rem;
  background-image: var(--brand-gradient);
  color: white;
  padding: 0.25rem 2rem;
  font-weight: 700;
  font-size: 0.9rem;
  transform: rotate(45deg);
}

/* --- EVENTS & FUNCTIONS GALLERY --- */
.events-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.gallery-item {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
}
.gallery-item:hover {
  transform: scale(1.05);
  box-shadow: var(--card-shadow-hover);
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85), transparent);
  color: #fff;
  padding: 2rem 1.5rem 1.5rem;
  font-size: 1.2rem;
  font-weight: 600;
  transform: translateY(100%);
  transition: transform 0.3s ease;
}
.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}

/* --- ABOUT SECTION --- */
.about-content {
  display: flex;
  align-items: center;
  gap: 3rem;
}
.about-image {
  flex: 1;
  max-width: 400px;
}
.about-image img {
  width: 100%;
  border-radius: 16px;
  box-shadow: var(--card-shadow);
}
.about-text {
  flex: 1.5;
}
.about-text p {
  color: var(--text-color-light);
  line-height: 1.8;
}

/* --- CONTACT SECTION --- */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: stretch;
}
.contact-form-card {
  background: var(--glass-bg);
  backdrop-filter: blur(5px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
  border-radius: 16px;
  padding: 2.5rem;
}
.contact-form-card form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.input-wrapper {
  position: relative;
}
.input-wrapper i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--placeholder-color);
}
.contact-form-card input,
.contact-form-card textarea {
  width: 100%;
  padding: 12px 12px 12px 40px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  color: var(--text-color);
  font-family: var(--font-family-body);
  font-size: 1rem;
  transition: all 0.2s ease;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.02) inset;
}
.contact-form-card textarea {
  padding: 12px;
  resize: vertical;
}
.contact-form-card input::placeholder,
.contact-form-card textarea::placeholder {
  color: var(--placeholder-color);
}
.contact-form-card input:focus,
.contact-form-card textarea:focus {
  outline: none;
  border-color: var(--brand-color);
  box-shadow: 0 0 0 3px hsla(202, 90%, 55%, 0.2);
}
.location-map {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--card-shadow);
  min-height: 400px;
}
.location-map iframe {
  width: 100%;
  height: 100%;
  border: 0;
}

/* --- SOCIAL MEDIA PRESENCE SECTION --- */
.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}
.social-card {
  display: flex;
  align-items: center;
  padding: 1.5rem;
  border-radius: 12px;
  text-decoration: none;
  color: white;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  overflow: hidden;
}
.social-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.social-card i {
  font-size: 2.5rem;
  margin-right: 1.5rem;
  position: relative;
  z-index: 2;
}
.social-info h4 {
  margin: 0 0 0.25rem 0;
  font-size: 1.2rem;
  font-family: var(--font-family-heading);
}
.social-info p {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.9;
}
.social-card.youtube {
  background-color: #ff0000;
}
.social-card.instagram {
  background-image: linear-gradient(
    45deg,
    #f09433 0%,
    #e6683c 25%,
    #dc2743 50%,
    #cc2366 75%,
    #bc1888 100%
  );
}
.social-card.facebook {
  background-color: #1877f2;
}
.social-card.telegram {
  background-color: #26a5e4;
}

/* --- FOOTER --- */
.site-footer {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  box-shadow: var(--card-shadow);
  border-radius: 12px;
  width: 95%;
  max-width: 1200px;
  margin: 2rem auto;
  padding: 1.5rem;
  text-align: center;
}
.social-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}
.social-links a {
  color: var(--text-color);
  font-size: 1.2rem;
  transition: color 0.3s ease, transform 0.3s ease;
}
.social-links a:hover {
  color: var(--brand-color);
  transform: translateY(-2px);
}
.site-footer p {
  font-size: 0.9rem;
  color: var(--text-color-light);
}

/* --- RESPONSIVE MEDIA QUERIES --- */
@media (max-width: 992px) {
  .about-content,
  .contact-wrapper {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
}
@media (max-width: 768px) {
  .hamburger-btn {
    display: block;
  }
  .header-content .main-nav {
    display: none;
  }
  .mobile-nav-menu {
    display: flex;
    position: fixed;
    top: 80px;
    left: 50%;
    width: 90%;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--card-shadow-hover);
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transform: translateX(-50%) translateY(-15px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }
  .mobile-nav-menu.is-active {
    opacity: 1;
    pointer-events: all;
    transform: translateX(-50%) translateY(0);
  }
  .mobile-nav-menu a {
    color: var(--nav-text-color);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 500;
  }
  .hero-title {
    font-size: 2.5rem;
  }
  .section-title {
    font-size: 2.2rem;
  }
}
@media (max-width: 576px) {
  .site-header,
  .site-footer {
    width: 90%;
  }
  .section {
    padding: 4rem 1rem;
  }
  .hero-title {
    font-size: 2.2rem;
  }
}