@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* Brand Color Palette */
  --bg-primary: #071D36;
  --bg-secondary: #0B2A4D;
  --bg-tertiary: #041427;
  
  --blue-primary: #006CC9;
  --blue-bright: #18A8FF;
  --blue-deep: #003F7A;
  --blue-glow: rgba(24, 168, 255, 0.25);
  
  --silver-metallic: #C7CBD0;
  --silver-light: #E5E8EB;
  --charcoal: #3B424A;
  --white: #FFFFFF;
  
  --border-line: rgba(199, 203, 208, 0.15);
  --border-glow: rgba(24, 168, 255, 0.4);
  
  /* Typography */
  --font-heading: 'Space Grotesk', -apple-system, sans-serif;
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Layout & Elevation */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 16px 40px rgba(4, 20, 39, 0.6);
  --shadow-glow: 0 0 30px rgba(24, 168, 255, 0.2);
  
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  background-color: var(--bg-primary);
  color: var(--silver-light);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Technical Blueprint Grid Pattern */
.bg-blueprint {
  background-image: 
    linear-gradient(rgba(0, 108, 201, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 108, 201, 0.08) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center center;
}

.bg-radial-glow {
  background: radial-gradient(circle at 50% 30%, rgba(24, 168, 255, 0.12) 0%, rgba(7, 29, 54, 0) 70%);
}

/* Typography Utility Classes */
h1, h2, h3, h4, h5, h6, .font-heading {
  font-family: var(--font-heading);
  color: var(--white);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.font-mono { font-family: var(--font-mono); }

.text-gradient {
  background: linear-gradient(135deg, var(--white) 30%, var(--silver-metallic) 70%, var(--blue-bright) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.text-blue-bright { color: var(--blue-bright); }
.text-silver { color: var(--silver-metallic); }
.text-dim { color: rgba(229, 232, 235, 0.7); }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--blue-bright);
  background: rgba(0, 108, 201, 0.15);
  border: 1px solid rgba(24, 168, 255, 0.3);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  margin-bottom: 1.25rem;
}

.section-label::before {
  content: '';
  width: 6px;
  height: 6px;
  background-color: var(--blue-bright);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--blue-bright);
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem auto;
}

.section-title {
  font-size: clamp(2.2rem, 4vw, 3.2rem);
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--silver-metallic);
}

/* Containers */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 7rem 0;
  position: relative;
}

/* Component: Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-primary), var(--blue-deep));
  color: var(--white);
  border-color: rgba(24, 168, 255, 0.4);
  box-shadow: 0 4px 20px rgba(0, 108, 201, 0.4);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--blue-bright), var(--blue-primary));
  box-shadow: 0 6px 30px rgba(24, 168, 255, 0.6);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(11, 42, 77, 0.6);
  color: var(--silver-light);
  border-color: var(--border-line);
  backdrop-filter: blur(8px);
}

.btn-secondary:hover {
  background: rgba(11, 42, 77, 0.9);
  border-color: var(--blue-bright);
  color: var(--white);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  background: rgba(24, 168, 255, 0.1);
  box-shadow: var(--shadow-glow);
}

/* Glass & Structural Cards */
.card-structural {
  background: rgba(11, 42, 77, 0.4);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 2rem;
  backdrop-filter: blur(12px);
  transition: var(--transition);
  position: relative;
}

.card-structural::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 2px;
  background: linear-gradient(90deg, transparent, var(--blue-bright), transparent);
  opacity: 0;
  transition: var(--transition);
}

.card-structural:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.card-structural:hover::before {
  opacity: 1;
}

/* Corner Technical Markings */
.tech-corner-br {
  position: relative;
}
.tech-corner-br::after {
  content: '+';
  position: absolute;
  bottom: 8px; right: 12px;
  font-family: var(--font-mono);
  color: var(--blue-bright);
  font-size: 0.9rem;
  opacity: 0.6;
}

/* Navbar */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 80px;
  z-index: 1000;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled {
  height: 70px;
  background: rgba(7, 29, 54, 0.9);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--border-line);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

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

.nav-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.nav-brand img {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 0 8px rgba(24, 168, 255, 0.4));
  transition: var(--transition);
}

.brand-text {
  display: flex;
  flex-direction: column;
}

.brand-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--white);
  line-height: 1;
  letter-spacing: 0.05em;
}

.brand-subtitle {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--blue-bright);
  letter-spacing: 0.15em;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-link {
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--silver-metallic);
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: var(--transition);
  position: relative;
  padding: 0.5rem 0;
}

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

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

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

.nav-cta {
  padding: 0.6rem 1.4rem;
  font-size: 0.85rem;
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  padding-top: 130px;
  padding-bottom: 60px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 2;
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-badge {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue-bright);
  background: rgba(0, 108, 201, 0.2);
  border: 1px solid rgba(24, 168, 255, 0.4);
  padding: 0.4rem 1rem;
  border-radius: 4px;
  margin-bottom: 1.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.hero-badge .pulse-dot {
  width: 8px; height: 8px;
  background-color: var(--blue-bright);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--blue-bright);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.5; }
}

.hero-title {
  font-size: clamp(3rem, 5vw, 4.8rem);
  line-height: 1.05;
  margin-bottom: 0.5rem;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-theme {
  font-size: clamp(1.8rem, 3.5vw, 3rem);
  color: var(--blue-bright);
  font-weight: 700;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero-theme::after {
  content: '';
  flex: 1;
  height: 2px;
  background: linear-gradient(90deg, var(--blue-bright), transparent);
}

.hero-institution {
  font-size: 1.05rem;
  color: var(--silver-metallic);
  line-height: 1.6;
  margin-bottom: 2rem;
  border-left: 3px solid var(--blue-primary);
  padding-left: 1rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

/* Countdown Card */
.countdown-box {
  background: rgba(11, 42, 77, 0.6);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.75rem;
  backdrop-filter: blur(12px);
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow-sm);
}

.countdown-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--silver-metallic);
  margin-bottom: 0.75rem;
  display: flex;
  justify-content: space-between;
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  text-align: center;
}

.countdown-item {
  background: rgba(7, 29, 54, 0.7);
  border: 1px solid rgba(199, 203, 208, 0.1);
  padding: 0.6rem 0.4rem;
  border-radius: var(--radius-sm);
}

.countdown-num {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.countdown-unit {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--blue-bright);
  text-transform: uppercase;
  margin-top: 0.2rem;
}

/* Hero Visual Showcase */
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-frame {
  position: relative;
  width: 100%;
  max-width: 440px;
  aspect-ratio: 1/1;
  background: radial-gradient(circle at center, rgba(11, 42, 77, 0.8), rgba(7, 29, 54, 0.95));
  border: 1px solid var(--border-line);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem;
  box-shadow: var(--shadow-lg), 0 0 50px rgba(0, 108, 201, 0.15);
  overflow: hidden;
}

.hero-logo-img {
  width: 65%;
  max-width: 260px;
  height: auto;
  filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.6));
  z-index: 2;
  transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-frame:hover .hero-logo-img {
  transform: scale(1.05);
}

.hero-circuit-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background-image: 
    linear-gradient(45deg, rgba(24, 168, 255, 0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(24, 168, 255, 0.05) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(24, 168, 255, 0.05) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(24, 168, 255, 0.05) 75%);
  background-size: 30px 30px;
  opacity: 0.6;
}

.hero-frame-tag {
  position: absolute;
  bottom: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--blue-bright);
  background: rgba(7, 29, 54, 0.8);
  border: 1px solid rgba(24, 168, 255, 0.3);
  padding: 0.3rem 0.8rem;
  border-radius: 4px;
  z-index: 3;
}

/* Stats Section */
.stats-bar {
  background: rgba(11, 42, 77, 0.5);
  border-y: 1px solid var(--border-line);
  padding: 2.5rem 0;
  backdrop-filter: blur(10px);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  text-align: center;
}

.stat-item {
  position: relative;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
  margin-bottom: 0.4rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--silver-metallic);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Section: Techathon Philosophy */
.techathon-concept {
  background: var(--bg-tertiary);
  border-y: 1px solid var(--border-line);
}

.concept-flow {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1rem;
  margin-top: 3.5rem;
}

.flow-card {
  background: rgba(11, 42, 77, 0.4);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  padding: 1.75rem 1.25rem;
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.flow-step {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue-bright);
  margin-bottom: 0.75rem;
}

.flow-title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.flow-desc {
  font-size: 0.85rem;
  color: var(--silver-metallic);
}

.flow-card:hover {
  border-color: var(--blue-bright);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

/* Feature Grid (Why Nirmaan) */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.feature-icon {
  width: 52px; height: 52px;
  background: rgba(0, 108, 201, 0.2);
  border: 1px solid rgba(24, 168, 255, 0.3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-bright);
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.feature-title {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.feature-desc {
  color: var(--silver-metallic);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Section: Skill Development */
.skills-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.skill-pill {
  background: rgba(11, 42, 77, 0.3);
  border: 1px solid var(--border-line);
  padding: 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: var(--transition);
}

.skill-pill:hover {
  background: rgba(11, 42, 77, 0.7);
  border-color: var(--blue-bright);
  transform: translateX(4px);
}

.skill-pill-icon {
  color: var(--blue-bright);
  font-size: 1.25rem;
}

.skill-pill-text {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--silver-light);
}

/* Section: Flagship Challenge */
.flagship-box {
  background: linear-gradient(135deg, rgba(11, 42, 77, 0.8), rgba(7, 29, 54, 0.95));
  border: 1px solid var(--blue-bright);
  border-radius: var(--radius-lg);
  padding: 3.5rem;
  box-shadow: 0 0 40px rgba(0, 108, 201, 0.2);
  position: relative;
  overflow: hidden;
}

.flagship-badge {
  position: absolute;
  top: 2rem; right: 2rem;
  background: var(--blue-bright);
  color: var(--bg-tertiary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.8rem;
  padding: 0.4rem 1rem;
  border-radius: 50px;
  text-transform: uppercase;
}

.flagship-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 3rem;
  align-items: center;
}

.flagship-title {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.flagship-desc {
  font-size: 1.05rem;
  color: var(--silver-metallic);
  margin-bottom: 2rem;
  line-height: 1.6;
}

.flagship-meta-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
}

.flagship-meta-card {
  background: rgba(7, 29, 54, 0.8);
  border: 1px solid var(--border-line);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--silver-metallic);
  text-transform: uppercase;
}

.meta-val {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--white);
  font-weight: 700;
  margin-top: 0.2rem;
}

/* Section: Events & Filter System */
.filter-bar {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.filter-btn {
  background: rgba(11, 42, 77, 0.4);
  border: 1px solid var(--border-line);
  color: var(--silver-metallic);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.6rem 1.4rem;
  border-radius: 50px;
  cursor: pointer;
  transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--blue-primary);
  border-color: var(--blue-bright);
  color: var(--white);
  box-shadow: 0 4px 15px rgba(0, 108, 201, 0.4);
}

.search-box-wrapper {
  max-width: 450px;
  margin: 0 auto 3rem auto;
  position: relative;
}

.search-input {
  width: 100%;
  background: rgba(11, 42, 77, 0.5);
  border: 1px solid var(--border-line);
  border-radius: 50px;
  padding: 0.8rem 1.5rem 0.8rem 3rem;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--blue-bright);
  box-shadow: 0 0 20px rgba(24, 168, 255, 0.2);
}

.search-icon {
  position: absolute;
  left: 1.25rem; top: 50%;
  transform: translateY(-50%);
  color: var(--silver-metallic);
  font-size: 1.1rem;
}

.events-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.event-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.event-category-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  color: var(--blue-bright);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.event-title {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
}

.event-desc {
  font-size: 0.9rem;
  color: var(--silver-metallic);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

.event-details-mini {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(229, 232, 235, 0.7);
  background: rgba(7, 29, 54, 0.5);
  padding: 0.75rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
}

.event-card-actions {
  display: flex;
  gap: 0.75rem;
}

/* Schedule Timeline */
.schedule-tabs {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.schedule-tab-btn {
  background: rgba(11, 42, 77, 0.4);
  border: 1px solid var(--border-line);
  padding: 1rem 2.5rem;
  border-radius: var(--radius-md);
  color: var(--silver-metallic);
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

.schedule-tab-btn .tab-day {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  display: block;
}

.schedule-tab-btn .tab-date {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  opacity: 0.8;
}

.schedule-tab-btn.active {
  background: var(--blue-primary);
  border-color: var(--blue-bright);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(0, 108, 201, 0.4);
}

.timeline-wrapper {
  max-width: 850px;
  margin: 0 auto;
  position: relative;
}

.timeline-line {
  position: absolute;
  top: 0; bottom: 0; left: 160px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue-bright), rgba(0, 108, 201, 0.2));
}

.timeline-row {
  display: flex;
  gap: 2.5rem;
  margin-bottom: 2rem;
  position: relative;
}

.timeline-time {
  width: 130px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--blue-bright);
  padding-top: 0.25rem;
}

.timeline-node {
  width: 14px; height: 14px;
  background: var(--blue-bright);
  border: 3px solid var(--bg-primary);
  border-radius: 50%;
  margin-top: 0.4rem;
  position: relative;
  z-index: 2;
  box-shadow: 0 0 10px var(--blue-bright);
}

.timeline-card {
  flex-grow: 1;
}

/* Sponsors / Partners Grid */
.sponsor-tier-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--silver-metallic);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  text-align: center;
  margin-bottom: 1.5rem;
}

.sponsor-tier-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 3.5rem;
}

.sponsor-slot {
  background: rgba(11, 42, 77, 0.3);
  border: 1px dashed var(--border-line);
  border-radius: var(--radius-md);
  padding: 1.5rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: rgba(199, 203, 208, 0.5);
  transition: var(--transition);
  min-width: 180px;
}

.sponsor-slot:hover {
  border-color: var(--blue-bright);
  color: var(--silver-light);
  background: rgba(11, 42, 77, 0.6);
}

/* Team Grid & Tabs */
.team-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  flex-wrap: wrap;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.team-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.team-avatar {
  width: 90px; height: 90px;
  border-radius: 50%;
  background: rgba(0, 108, 201, 0.2);
  border: 2px solid var(--blue-bright);
  margin: 0 auto 1.25rem auto;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue-bright);
  font-size: 2rem;
}

.team-name {
  font-size: 1.15rem;
  margin-bottom: 0.25rem;
}

.team-role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--blue-bright);
  text-transform: uppercase;
}

/* Organising Committee Directory */
.committee-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.committee-box {
  background: rgba(11, 42, 77, 0.3);
  border: 1px solid var(--border-line);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-sm);
}

.committee-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  color: var(--white);
  margin-bottom: 0.5rem;
}

.committee-details {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--silver-metallic);
  line-height: 1.5;
}

/* Gallery Masonry/Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.gallery-item {
  aspect-ratio: 4/3;
  background: rgba(11, 42, 77, 0.5);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.gallery-item svg {
  width: 60px; height: 60px;
  color: rgba(24, 168, 255, 0.3);
  transition: var(--transition);
}

.gallery-caption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 1rem;
  background: linear-gradient(0deg, rgba(7, 29, 54, 0.95), transparent);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  color: var(--white);
  transform: translateY(100%);
  transition: var(--transition);
}

.gallery-item:hover {
  border-color: var(--blue-bright);
  transform: scale(1.02);
}

.gallery-item:hover svg {
  color: var(--blue-bright);
  transform: scale(1.1);
}

.gallery-item:hover .gallery-caption {
  transform: translateY(0);
}

/* Modal Popup System */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(4, 20, 39, 0.85);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  max-width: 650px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  padding: 2.5rem;
  position: relative;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform: scale(0.95);
  transition: var(--transition);
}

.modal-overlay.active .modal-box {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 1.5rem; right: 1.5rem;
  background: none;
  border: none;
  color: var(--silver-metallic);
  font-size: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
}

.modal-close:hover {
  color: var(--white);
}

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

.form-label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--silver-light);
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  background: rgba(7, 29, 54, 0.7);
  border: 1px solid var(--border-line);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}

.form-control:focus {
  border-color: var(--blue-bright);
  box-shadow: 0 0 12px rgba(24, 168, 255, 0.2);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background: var(--bg-tertiary);
  border-top: 1px solid var(--border-line);
  padding: 5rem 0 2rem 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand p {
  color: var(--silver-metallic);
  font-size: 0.9rem;
  margin-top: 1rem;
  max-width: 320px;
}

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

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

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

.footer-links a {
  color: var(--silver-metallic);
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: var(--blue-bright);
}

.footer-bottom {
  border-top: 1px solid rgba(199, 203, 208, 0.08);
  padding-top: 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--silver-metallic);
}

/* Accessibility & Focus */
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--blue-bright);
  outline-offset: 3px;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; text-align: center; }
  .hero-content { align-items: center; }
  .hero-institution { border-left: none; padding-left: 0; }
  .hero-actions { justify-content: center; }
  .countdown-box { margin: 0 auto; }
  .hero-visual { display: none; }
  
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .concept-flow { grid-template-columns: repeat(3, 1fr); }
  .skills-wrapper { grid-template-columns: repeat(2, 1fr); }
  .flagship-grid { grid-template-columns: 1fr; }
  .events-grid { grid-template-columns: repeat(2, 1fr); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .committee-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .mobile-toggle { display: block; }
  
  .timeline-line { left: 20px; }
  .timeline-row { flex-direction: column; gap: 0.5rem; padding-left: 40px; }
  .timeline-time { text-align: left; width: auto; }
  .timeline-node { position: absolute; left: 14px; top: 0; }
  
  .events-grid { grid-template-columns: 1fr; }
  .concept-flow { grid-template-columns: 1fr; }
  .skills-wrapper { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .committee-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}