/* ─── CSS Custom Properties ───────────────────────────────────────────── */
:root {
  --bg:           #0d0f14;
  --bg-surface:   #141720;
  --bg-card:      #1a1d28;
  --bg-card-hover:#1f2335;
  --border:       rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.15);
  --text-primary: #e8eaf0;
  --text-muted:   #7e8494;
  --accent:       #6c63ff;
  --accent-glow:  rgba(108,99,255,0.25);
  --tag-bg:       rgba(108,99,255,0.12);
  --tag-color:    #a09eff;
  --radius:       12px;
  --radius-sm:    8px;
  --transition:   0.2s ease;
  --font-sans:    'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono:    'Cascadia Code', 'Fira Code', 'Consolas', monospace;
  --max-width:    1100px;
}

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

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

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

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img, svg { display: block; }

/* ─── Utility ─────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 2.5rem;
  color: var(--text-primary);
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  display: block;
  width: 2.5rem;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  margin-top: 0.5rem;
}

/* ─── Fade-in Animations ───────────────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.15s; }
.delay-2 { transition-delay: 0.3s; }
.delay-3 { transition-delay: 0.45s; }

/* ─── Hero Section ────────────────────────────────────────────────────── */
.hero {
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 1.5rem 6rem;
  position: relative;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, rgba(108,99,255,0.12) 0%, transparent 70%);
}

.hero-content {
  max-width: 640px;
}

.hero-name {
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  background: linear-gradient(135deg, #fff 30%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.hero-tagline {
  font-size: clamp(0.875rem, 2vw, 1rem);
  font-family: var(--font-mono);
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.hero-bio {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-muted);
  max-width: 480px;
  margin: 0 auto 2.5rem;
}

/* ─── Social Links ────────────────────────────────────────────────────── */
.social-links {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition),
              background var(--transition), transform var(--transition),
              box-shadow var(--transition);
}

.social-link:hover,
.social-link:focus-visible {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--bg-card);
  transform: translateY(-3px);
  box-shadow: 0 0 16px var(--accent-glow);
  outline: none;
}

.social-link svg {
  width: 1.1rem;
  height: 1.1rem;
}

/* ─── Scroll Hint ─────────────────────────────────────────────────────── */
.hero-scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  color: var(--text-muted);
  opacity: 0.5;
  animation: bounce 2s ease-in-out infinite;
}

.hero-scroll-hint svg {
  width: 1.5rem;
  height: 1.5rem;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(6px); }
}

/* ─── Projects Section ────────────────────────────────────────────────── */
.projects {
  padding: 6rem 0;
  background: var(--bg-surface);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.project-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color var(--transition), background var(--transition),
              transform var(--transition), box-shadow var(--transition);
  cursor: pointer;
}

.project-card:hover,
.project-card:focus-visible {
  border-color: var(--accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.4), 0 0 0 1px var(--accent-glow);
  outline: none;
}

.project-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.project-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.project-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  flex: 1;
  margin-bottom: 1.25rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.project-tags li {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--tag-bg);
  color: var(--tag-color);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  border: 1px solid rgba(108,99,255,0.2);
}

.project-link-label {
  font-size: 0.8rem;
  color: var(--accent);
  font-family: var(--font-mono);
  margin-top: auto;
  opacity: 0.7;
  transition: opacity var(--transition);
}

.project-card:hover .project-link-label,
.project-card:focus-visible .project-link-label {
  opacity: 1;
}

/* ─── Tech Section ────────────────────────────────────────────────────── */
.tech {
  padding: 6rem 0;
  background: var(--bg);
}

.tech-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tech-badge {
  font-size: 0.875rem;
  font-family: var(--font-mono);
  background: var(--bg-surface);
  color: var(--text-muted);
  border: 1px solid var(--border);
  padding: 0.4rem 1rem;
  border-radius: 2rem;
  transition: color var(--transition), border-color var(--transition),
              background var(--transition);
}

.tech-badge:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
  background: var(--bg-card);
}

/* ─── Footer ──────────────────────────────────────────────────────────── */
.footer {
  padding: 2.5rem 0;
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer .container {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  align-items: center;
}

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

.footer-hetzner {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  opacity: 0.5;
}

/* ─── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .project-grid {
    grid-template-columns: 1fr;
  }

  .tech-grid {
    gap: 0.5rem;
  }

  .section-title {
    margin-bottom: 2rem;
  }

  .projects,
  .tech {
    padding: 4rem 0;
  }
}

/* ─── Reduced motion ──────────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .fade-in {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .hero-scroll-hint {
    animation: none;
  }

  .project-card,
  .social-link {
    transition: none;
  }
}