/* 
  Ranjidam Group Trust (RGT) - Comprehensive Stylesheet
  Modern, Responsive & Lightweight CSS for GitHub Pages
*/

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

:root {
  /* Brand Palette */
  --primary: #0284c7;        /* Energetic Ocean Blue */
  --primary-hover: #0369a1;
  --primary-dark: #0f172a;   /* Slate Deep Navy */
  --accent-emerald: #059669; /* Hope Emerald Green */
  --accent-amber: #d97706;   /* Warm Trust Amber */
  --accent-light: #ecfdf5;
  
  /* Neutral Palette */
  --bg-main: #f8fafc;
  --bg-surface: #ffffff;
  --bg-subtle: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --border-focus: #0284c7;

  /* Elevation & Effects */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px -2px rgba(0, 0, 0, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 12px 24px -4px rgba(0, 0, 0, 0.12), 0 4px 8px -2px rgba(0, 0, 0, 0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  
  /* Transition */
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

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

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

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

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Utility Badges */
.badge-bar {
  background: linear-gradient(135deg, var(--primary-dark), #1e293b);
  color: #ffffff;
  font-size: 0.875rem;
  padding: 0.6rem 0;
  text-align: center;
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.badge-bar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.badge-items {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.badge-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8125rem;
  opacity: 0.9;
}

.badge-item svg {
  color: #38bdf8;
}

.badge-highlight {
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-full);
  font-weight: 600;
  border: 1px solid rgba(52, 211, 153, 0.3);
}

/* Sticky Navigation Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-md);
  background-color: rgba(255, 255, 255, 0.98);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 84px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: -0.02em;
}

.brand-logo .logo-img {
  height: 48px;
  width: auto;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
}

.brand-text span {
  display: block;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-emerald);
  font-weight: 700;
  margin-top: -2px;
  white-space: nowrap;
}

/* Nav Menu & Dropdowns */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 1rem;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
  padding: 0.5rem 0.35rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  position: relative;
  cursor: pointer;
  white-space: nowrap;
}

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary);
  border-radius: var(--radius-full);
}

.dropdown-arrow {
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 240px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 0.5rem 0;
  list-style: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 1100;
}

.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item a {
  display: block;
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}

.dropdown-item a:hover {
  background-color: var(--bg-subtle);
  color: var(--primary);
  padding-left: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 2px solid transparent;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent-emerald);
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(5, 150, 105, 0.3);
}

.btn-primary:hover {
  background-color: #047857;
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(5, 150, 105, 0.4);
}

.btn-secondary {
  background-color: var(--primary-dark);
  color: #ffffff;
}

.btn-secondary:hover {
  background-color: #1e293b;
  color: #ffffff;
  transform: translateY(-2px);
}

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

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

/* Mobile Nav Hamburger */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--primary-dark);
}

.hamburger svg {
  width: 28px;
  height: 28px;
}

/* Hero Section */
.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 43, 72, 0.82) 100%), url('../img/home-banner.jpg') center/cover no-repeat;
  color: #ffffff;
  padding: 5.5rem 0 6.5rem 0;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(2, 132, 199, 0.25) 0%, rgba(5, 150, 105, 0) 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3.5rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(8px);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: #38bdf8;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.hero-title {
  font-size: 3.25rem;
  color: #ffffff;
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.03em;
}

.hero-title span {
  background: linear-gradient(135deg, #38bdf8, #34d399);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-description {
  font-size: 1.15rem;
  color: #94a3b8;
  margin-bottom: 2.25rem;
  max-width: 600px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.hero-card-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  position: relative;
  z-index: 2;
}

.hero-stat-card {
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
  transition: var(--transition);
}

.hero-stat-card:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.4);
}

.stat-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), var(--accent-emerald));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.stat-info h4 {
  color: #ffffff;
  font-size: 1.25rem;
  margin-bottom: 0.2rem;
}

.stat-info p {
  color: #94a3b8;
  font-size: 0.9rem;
}

/* Sections */
.section {
  padding: 5rem 0;
}

.section-bg-subtle {
  background-color: var(--bg-subtle);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3.5rem auto;
}

.section-subtitle {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.section-title {
  font-size: 2.25rem;
  color: var(--primary-dark);
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.section-description {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

/* Cards & Grids */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(2, 132, 199, 0.3);
}

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.75rem;
}

.card-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
  color: var(--primary-dark);
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Team Grid & Member Cards */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.75rem;
}

.team-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.team-avatar {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #38bdf8, #059669);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.4rem;
  margin: 0 auto 1.25rem auto;
  box-shadow: 0 4px 10px rgba(2, 132, 199, 0.25);
}

.team-name {
  font-size: 1.15rem;
  color: var(--primary-dark);
  margin-bottom: 0.25rem;
}

.team-degree {
  font-size: 0.8rem;
  color: var(--accent-emerald);
  font-weight: 700;
  margin-bottom: 0.5rem;

}

.team-role {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 0.5rem;
}

.team-dept {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Tables */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  background: #ffffff;
}

.summary-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.summary-table th, .summary-table td {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

.summary-table th {
  background-color: var(--primary-dark);
  color: #ffffff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.95rem;
}

.summary-table tr:hover {
  background-color: var(--bg-subtle);
}

.summary-table td.count-cell {
  font-weight: 800;
  color: var(--accent-emerald);
  font-size: 1.1rem;
}

/* Media & Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.gallery-card {
  background: #ffffff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.gallery-media {
  width: 100%;
  height: 220px;
  object-fit: cover;
  background: #000;
}

.gallery-content {
  padding: 1.5rem;
}

/* Video Container */
.video-container {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background-color: #000;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Downloads Grid */
.downloads-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.download-card {
  background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.download-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.download-icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-md);
  background: #fee2e2;
  color: #ef4444;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.5rem;
}

.download-icon.google-form-icon {
  background: #e0e7ff;
  color: #4f46e5;
}

.download-info h4 {
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.download-info p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* Contact Grid & Forms */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-card {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 2rem;
}

.contact-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: rgba(2, 132, 199, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.25rem;
}

.contact-details h4 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
  color: var(--primary-dark);
}

.contact-details p, .contact-details a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.contact-form-card {
  background-color: var(--bg-surface);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--primary-dark);
}

.form-control {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background-color: var(--bg-main);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--border-focus);
  background-color: #ffffff;
  box-shadow: 0 0 0 4px rgba(2, 132, 199, 0.15);
}

textarea.form-control {
  resize: vertical;
  min-height: 130px;
}

/* Payment & Bank Details Card */
.payment-card {
  background: linear-gradient(135deg, #0f172a, #1e293b);
  color: #ffffff;
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.payment-card h3 {
  color: #ffffff;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.payment-card p {
  color: #94a3b8;
  margin-bottom: 1.5rem;
}

.qr-box {
  background: #ffffff;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  text-align: center;
  max-width: 260px;
  margin: 0 auto 1.5rem auto;
  box-shadow: var(--shadow-md);
}

.qr-box img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  margin: 0 auto;
  border-radius: var(--radius-sm);
}

.qr-box p {
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 0.875rem;
  margin-top: 0.75rem;
  margin-bottom: 0;
}

/* Social Links */
.social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-link {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  background-color: var(--bg-subtle);
  color: var(--primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  font-size: 1.1rem;
  font-weight: 700;
}

.social-link:hover {
  background-color: var(--primary);
  color: #ffffff;
  transform: translateY(-2px);
}

/* Site Footer */
.site-footer {
  background-color: var(--primary-dark);
  color: #94a3b8;
  padding: 4rem 0 2rem 0;
  margin-top: auto;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand h3 {
  color: #ffffff;
  font-size: 1.4rem;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
  color: #94a3b8;
}

.footer-title {
  color: #ffffff;
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #38bdf8;
  padding-left: 4px;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .hero-title {
    font-size: 2.75rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 1100px) {
  .badge-bar .container {
    justify-content: center;
  }
  .navbar {
    height: 75px;
  }
  .hamburger {
    display: block;
  }
  .nav-menu {
    position: fixed;
    top: 75px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 75px);
    background-color: #ffffff;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    gap: 1rem;
    overflow-y: auto;
    transition: var(--transition);
    box-shadow: var(--shadow-lg);
  }
  .nav-menu.active {
    left: 0;
  }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
    display: none;
    width: 100%;
  }
  .nav-item.open .dropdown-menu {
    display: block;
  }
}

@media (max-width: 768px) {
  .hero {
    padding: 3.5rem 0 4.5rem 0;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .hero-title {
    font-size: 2.25rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}