/* ===== TRAILBLAZERS DI TEAM WEBSITE ===== */
/* Design System: Bento Grid + Hero Storytelling */

:root {
  --color-primary: #2b2d2f;
  --color-accent: #d4382c;
  --color-accent-light: #e8524a;
  --color-gold: #f0b429;
  --color-teal: #3aafa9;
  --color-blue: #4a90d9;
  --color-bg: #fafafa;
  --color-card: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 60px rgba(0,0,0,0.15);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  padding: 0 2rem;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -0.5px;
}

.nav-logo span { color: var(--color-accent); }

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

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover { color: var(--color-primary); }
.nav-links a.active { color: var(--color-accent); }

.nav-cta {
  background: var(--color-accent);
  color: white !important;
  padding: 0.5rem 1.2rem;
  border-radius: 50px;
  font-weight: 600;
  transition: transform var(--transition), background var(--transition);
}

.nav-cta:hover { background: var(--color-accent-light); transform: scale(1.05); }

/* Mobile nav toggle */
.nav-toggle { display: none; cursor: pointer; font-size: 1.5rem; }

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 2rem 80px;
  background: linear-gradient(135deg, #1f2123 0%, #2b2d2f 50%, #1f2123 100%);
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(230,57,70,0.15) 0%, transparent 50%);
  animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
}

.hero-content { position: relative; z-index: 1; max-width: 800px; }

.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 0.4rem 1rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}

.hero h1 {
  font-size: clamp(3rem, 8vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1.05;
  margin-bottom: 1rem;
}

.hero h1 span { color: var(--color-gold); }

.hero-subtitle {
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto 2rem;
  font-weight: 300;
}

.hero-stats {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  margin-top: 3rem;
  flex-wrap: wrap;
}

.hero-stat { text-align: center; }
.hero-stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-gold);
}
.hero-stat-label {
  font-size: 0.85rem;
  opacity: 0.7;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2.5rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: white;
}
.btn-primary:hover { background: var(--color-accent-light); transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.btn-secondary {
  background: rgba(255,255,255,0.1);
  color: white;
  border: 1px solid rgba(255,255,255,0.3);
}
.btn-secondary:hover { background: rgba(255,255,255,0.2); transform: translateY(-2px); }

/* ===== SECTIONS ===== */
.section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
  margin-bottom: 1rem;
  color: var(--color-primary);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  max-width: 650px;
  margin-bottom: 3rem;
}

/* ===== BENTO GRID ===== */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.bento-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 2rem;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

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

.bento-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.bento-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-primary);
}

.bento-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ===== STUDENT CARDS ===== */
.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.student-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.student-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.student-card-header {
  padding: 2rem 2rem 1rem;
  position: relative;
}

.student-card-avatar {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.student-card-name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
}

.student-card-role {
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-top: 0.25rem;
}

.student-card-body { padding: 0 2rem 2rem; }

.student-card-project {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.student-card-skills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.skill-tag {
  background: #f0f4ff;
  color: var(--color-primary);
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 2rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 3px solid var(--color-bg);
  transform: translateX(-5px);
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin: 0.25rem 0;
}

.timeline-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ===== CTA BANNER ===== */
.cta-banner {
  background: linear-gradient(135deg, #1f2123, #2b2d2f);
  border-radius: var(--radius-xl);
  padding: 4rem 3rem;
  text-align: center;
  color: white;
  margin: 4rem 0;
}

.cta-banner h2 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.cta-banner p {
  opacity: 0.8;
  font-size: 1.1rem;
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--color-primary);
  color: white;
  padding: 3rem 2rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
}

.footer-text {
  opacity: 0.6;
  font-size: 0.9rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition);
}

.footer-links a:hover { color: white; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .hero { min-height: 80vh; padding: 100px 1.5rem 60px; }
  .hero h1 { font-size: 2.5rem; letter-spacing: -1px; }
  .hero-logo { height: 40px !important; }
  .hero-stats { gap: 1.5rem; }
  .hero-stat-number { font-size: 1.8rem; }
  .hero-buttons { flex-direction: column; align-items: center; }
  .section { padding: 4rem 1.5rem; }
  .bento-grid { grid-template-columns: 1fr; }
  .student-grid { grid-template-columns: 1fr; }
  .cta-banner { padding: 3rem 1.5rem; }
}