/* =====================================================
   IEEE CS UNAP — INDEX PAGE STYLES
   ===================================================== */

/* HERO SECTION */
.hero-section {
  background: var(--gradient-hero);
  color: var(--on-surface);
  padding: 6rem 0 5rem;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  align-items: center;
}

/* Geometric animated background */
.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(56,189,248,0.07) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(68,226,205,0.06) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(142,213,255,0.04) 0%, transparent 40%);
  pointer-events: none;
}

/* Grid overlay */
.hero-section::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath d='M 60 0 L 0 0 0 60' fill='none' stroke='rgba(56,189,248,0.06)' stroke-width='1'/%3E%3C/svg%3E");
  pointer-events: none;
  animation: gridDrift 40s linear infinite;
}

@keyframes gridDrift {
  from { transform: translate(0,0); }
  to   { transform: translate(60px,60px); }
}

.hero-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-content {
  text-align: center;
  max-width: 820px;
  margin: 0 auto;
}

/* IEEE branch badge */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(56,189,248,0.1);
  backdrop-filter: blur(12px);
  padding: 8px 20px;
  border-radius: var(--border-radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  font-family: var(--font-mono);
  margin-bottom: var(--spacing-xl);
  border: 1px solid rgba(56,189,248,0.3);
  color: var(--primary);
  letter-spacing: 0.04em;
}

.hero-badge i { color: var(--secondary); }

.hero-title {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  line-height: 1.1;
  color: var(--on-surface);
  letter-spacing: -0.02em;
}

/* Gradient text for accent words */
.hero-title .gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  display: block;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 400;
  color: var(--on-surface-variant);
  margin-top: var(--spacing-sm);
  letter-spacing: 0;
}

.hero-description {
  font-size: var(--text-lg);
  color: var(--on-surface-variant);
  margin: 0 auto var(--spacing-2xl);
  line-height: 1.7;
  max-width: 620px;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-buttons .btn {
  padding: 14px 32px;
  font-size: var(--text-base);
  font-weight: 600;
}

.hero-buttons .btn-secondary {
  background: transparent;
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
}

.hero-buttons .btn-secondary:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  background: rgba(68,226,205,0.08);
  transform: translateY(-2px);
}

/* STATS SECTION */
.stats-section {
  padding: var(--spacing-2xl) 0;
  background: var(--surface-container-low);
  border-bottom: 1px solid var(--outline-variant);
  position: relative;
  z-index: 3;
}

.stats-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: flex;
  justify-content: center;
}

.stat-item {
  background: var(--surface-container);
  padding: var(--spacing-2xl) var(--spacing-3xl);
  border-radius: var(--border-radius-large);
  text-align: center;
  border: 1px solid var(--outline-variant);
  transition: var(--transition);
  min-width: 260px;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-medium), var(--glow-primary);
  border-color: rgba(56,189,248,0.3);
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
  display: block;
  font-family: var(--font-mono);
  line-height: 1;
}

.stat-label {
  color: var(--on-surface-variant);
  font-weight: 500;
  font-size: var(--text-base);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: var(--text-sm);
}

/* PARTICIPANTS SECTION */
.participants-section {
  padding: var(--spacing-3xl) 0;
  background: var(--surface);
}

.participants-container {
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-3xl);
  color: var(--on-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  letter-spacing: -0.01em;
}

.section-title i {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.participants-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

/* CONTRIBUTOR CARDS — Glassmorphism */
.contributor-card {
  background: var(--surface-container);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius-large);
  padding: var(--spacing-2xl);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
}

.contributor-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0.6;
  transition: var(--transition);
}

.contributor-card:hover {
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-medium), 0 0 30px rgba(56,189,248,0.1);
  transform: translateY(-6px);
}

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

/* Avatar */
.contributor-avatar {
  width: 88px;
  height: 88px;
  border-radius: var(--border-radius-full);
  background: var(--surface-container-high);
  color: var(--on-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0 auto var(--spacing-lg) auto;
  border: 2px solid var(--outline-variant);
  box-shadow: var(--shadow-medium);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
  font-family: var(--font-mono);
}

.contributor-card:hover .contributor-avatar {
  border-color: var(--primary);
  box-shadow: var(--shadow-medium), var(--glow-primary);
}

.contributor-avatar img,
.contributor-card .contributor-avatar-img {
  width: 88px !important;
  height: 88px !important;
  border-radius: var(--border-radius-full) !important;
  object-fit: cover;
  object-position: center;
  display: block;
  margin: 0 auto var(--spacing-lg) !important;
  border: 2px solid var(--outline-variant) !important;
  transition: var(--transition);
}

.contributor-card:hover .contributor-avatar-img {
  border-color: var(--primary) !important;
  box-shadow: var(--glow-primary);
}

.contributor-name {
  font-size: var(--text-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--on-surface);
  text-align: center;
}

.contributor-nickname {
  color: var(--primary);
  font-weight: 500;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  margin-bottom: var(--spacing-md);
  text-align: center;
  letter-spacing: 0.02em;
}

.contributor-description {
  color: var(--on-surface-variant);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  line-height: 1.6;
  font-size: var(--text-sm);
  min-height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hobby tags */
.contributor-hobbies {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.hobby-tag {
  background: rgba(56,189,248,0.1);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: var(--border-radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-mono);
  border: 1px solid rgba(56,189,248,0.2);
  transition: var(--transition);
  letter-spacing: 0.03em;
}

.hobby-tag:hover {
  background: var(--primary);
  color: var(--on-primary);
  border-color: var(--primary);
}

/* Social links */
.contributor-social-links {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.contributor-social-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--border-radius);
  text-decoration: none;
  font-size: var(--text-xs);
  font-weight: 600;
  font-family: var(--font-mono);
  transition: var(--transition);
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
}

.contributor-social-link:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.contributor-social-link.github:hover {
  background: var(--on-surface);
  color: var(--surface);
  border-color: var(--on-surface);
}

.contributor-social-link.linkedin:hover {
  background: #0a66c2;
  color: #fff;
  border-color: #0a66c2;
}

.contributor-social-link.instagram:hover {
  background: linear-gradient(45deg, #f09433, #e6683c, #dc2743, #cc2366, #bc1888);
  color: #fff;
  border-color: #e6683c;
}

/* ANIMATIONS */
@keyframes fadeInUp {
  from { opacity:0; transform:translateY(24px); }
  to   { opacity:1; transform:translateY(0); }
}

.contributor-card {
  animation: fadeInUp 0.6s ease both;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .hero-section { min-height: auto; padding: 4rem 0 3.5rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .hero-buttons .btn { width: 100%; max-width: 300px; justify-content: center; }
  .participants-grid { grid-template-columns: 1fr; }
  .stats-container { padding: 0 var(--container-padding); }
  .stat-item { min-width: unset; width: 100%; max-width: 320px; }
}

@media (max-width: 480px) {
  .contributor-card { padding: var(--spacing-lg); }
}