/* ===== RESET & BASE ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg:           #0d0d0d;
  --surface:      #161616;
  --surface-hover:#1e1e1e;
  --border:       #252525;
  --accent:       #6c63ff;
  --accent-dim:   rgba(108, 99, 255, 0.12);
  --text-primary: #f0f0f0;
  --text-secondary: #888;
  --text-muted:   #555;

  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.75rem;
  --space-lg:  3.5rem;
  --space-xl:  6rem;

  --radius-sm: 8px;
  --radius-md: 14px;

  --max-w: 720px;
  --transition: 0.22s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

section {
  padding: var(--space-xl) 0;
}

section + section {
  border-top: 1px solid var(--border);
}

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

.fade-up {
  opacity: 0;
  animation: fadeUp 0.6s ease forwards;
}

.fade-up:nth-child(1) { animation-delay: 0.05s; }
.fade-up:nth-child(2) { animation-delay: 0.15s; }
.fade-up:nth-child(3) { animation-delay: 0.25s; }
.fade-up:nth-child(4) { animation-delay: 0.35s; }
.fade-up:nth-child(5) { animation-delay: 0.45s; }

/* ===== SECTION LABEL ===== */
.section-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-sm);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
}

/* ===== HERO ===== */
#hero {
  padding-top: calc(var(--space-xl) * 1.4);
  padding-bottom: var(--space-xl);
  border-top: none;
}

.hero-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid rgba(108, 99, 255, 0.25);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  margin-bottom: var(--space-md);
}

.hero-name {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}

.hero-name span {
  color: var(--accent);
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: var(--space-md);
}

/* Social links */
.social-links {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 0.45rem 1rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.social-link:hover {
  color: var(--text-primary);
  border-color: var(--accent);
  background: var(--accent-dim);
}

.social-link svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* ===== CARDS ===== */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-sm);
}

@media (min-width: 560px) {
  .card-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
  cursor: default;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(108, 99, 255, 0.35);
  background: var(--surface-hover);
}

.card-tag {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.45rem;
}

.card-desc {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: var(--space-sm);
}

.chip {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.2rem 0.65rem;
}

.card-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.5;
  pointer-events: none;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: opacity var(--transition);
}

.card-link.active {
  opacity: 1;
  pointer-events: all;
}

.card-link.active:hover {
  opacity: 0.75;
}

/* ===== CASE STUDIES ===== */
.case-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.case-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}

.case-card:hover {
  transform: translateY(-3px);
  border-color: rgba(108, 99, 255, 0.35);
  background: var(--surface-hover);
}

.case-num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--border);
  line-height: 1;
  min-width: 2.5rem;
  letter-spacing: -0.04em;
  padding-top: 2px;
  transition: color var(--transition);
}

.case-card:hover .case-num {
  color: var(--accent);
}

.case-body {
  flex: 1;
}

.case-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.case-teaser {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

/* ===== THOUGHTS ===== */
.thoughts-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.thought-item {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  transition: padding-left var(--transition);
}

.thought-item:last-of-type {
  border-bottom: none;
}

.thought-item:hover {
  padding-left: 6px;
}

.thought-date {
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.thought-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.thought-excerpt {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.thought-link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.5;
  pointer-events: none;
  align-self: flex-start;
}

.thoughts-footer {
  margin-top: var(--space-md);
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ===== FOOTER ===== */
footer {
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
}

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

footer a:hover {
  color: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 480px) {
  .case-card {
    flex-direction: column;
    gap: 0.5rem;
  }

  .case-num {
    font-size: 1.4rem;
  }
}