:root {
  --bg: #0B0B0C;
  --panel: #17181A;
  --border: #2A2B2E;
  --text-primary: #F2F2F0;
  --text-secondary: #9A9A98;
  --text-muted: #6A6A68;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation: none !important;
    transition: none !important;
  }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.7;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--text-primary);
  outline-offset: 3px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 6vw;
  background: rgba(11, 11, 12, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: 1.5px;
  text-decoration: none;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-decoration: none;
  color: var(--text-secondary);
  letter-spacing: 0.5px;
  transition: color 0.15s ease;
  position: relative;
}

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

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

.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 1px;
  background: var(--text-primary);
}

.hero {
  padding: 96px 6vw 60px;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 6vw, 4rem);
  margin: 0 0 8px;
  letter-spacing: -0.5px;
}

.hero-role {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin: 0 0 40px;
}

.wave-wrap {
  width: 100%;
  height: 120px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 10px 0;
}

#waveCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.typewriter-cursor {
  color: var(--text-primary);
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.wave-caption {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-muted);
  margin: 10px 0 0;
}

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 6vw;
}

.section {
  padding: 64px 0;
  border-bottom: 1px solid var(--border);
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--text-muted);
  text-transform: uppercase;
  margin: 0 0 28px;
  font-weight: 500;
}

.about-text {
  max-width: 640px;
  font-size: 1.02rem;
  color: var(--text-secondary);
  margin: 0 0 20px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.project-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px;
  transition: border-color 0.2s ease, transform 0.1s ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}

.project-card:hover,
.project-card:focus-within {
  border-color: #45464A;
}

.project-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}

.project-head h3 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 500;
  margin: 0;
  line-height: 1.35;
}

.status-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.5px;
  color: var(--text-primary);
  background: #232427;
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 3px 10px;
  white-space: nowrap;
  flex-shrink: 0;
}

.project-summary {
  font-size: 0.93rem;
  color: var(--text-secondary);
  margin: 0;
}

.project-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.project-card[data-expanded="true"] .project-detail {
  max-height: 220px;
}

.project-detail p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 14px 0 0;
}

.demo-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  margin: 14px 0;
}

.demo-box canvas {
  width: 100%;
  height: 90px;
  display: block;
  touch-action: none;
}

.demo-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.demo-label {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  white-space: nowrap;
}

.demo-readout {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--text-primary);
  margin-left: auto;
}

input[type="range"] {
  flex: 1;
  min-width: 60px;
  accent-color: var(--text-primary);
}

.demo-btn {
  background: #232427;
  border: 1px solid var(--border);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 11px;
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
}

.demo-btn:hover {
  border-color: #45464A;
}

.project-detail-text {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin: 4px 0 10px;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}

.project-stack {
  font-family: var(--font-mono) !important;
  font-size: 0.78rem !important;
  color: var(--text-muted) !important;
}

.expand-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.5px;
  padding: 12px 0 0;
  cursor: pointer;
  text-align: left;
}

.expand-btn:hover {
  color: var(--text-primary);
}

.edu-grid {
  display: grid;
  gap: 24px;
}

.edu-item h3 {
  font-family: var(--font-display);
  font-size: 1.02rem;
  font-weight: 500;
  margin: 0 0 4px;
}

.edu-meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0;
}

.contact-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  max-width: 520px;
}

.contact-row {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 16px 20px;
  background: none;
  border: none;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  color: inherit;
  font-family: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease;
}

.contact-row:last-child {
  border-bottom: none;
}

.contact-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.contact-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-muted);
  width: 78px;
  flex-shrink: 0;
}

.contact-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  flex: 1;
}

.contact-value-solo {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-primary);
  flex: 1;
}

.contact-hint {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  opacity: 0;
  transition: opacity 0.15s ease;
  white-space: nowrap;
}

.contact-row:hover .contact-hint {
  opacity: 1;
}

.contact-row.copied .contact-hint {
  opacity: 1;
  color: var(--text-primary);
}

.contact-arrow {
  color: var(--text-muted);
  flex-shrink: 0;
  transition: color 0.15s ease, transform 0.15s ease;
}

.contact-row-link:hover .contact-arrow {
  color: var(--text-primary);
  transform: translate(2px, -2px);
}

.footer {
  display: flex;
  justify-content: space-between;
  padding: 28px 6vw 40px;
  max-width: 900px;
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .nav-links {
    gap: 16px;
  }
  .nav-links a {
    font-size: 11px;
  }
  .hero {
    padding: 72px 6vw 40px;
  }
}