/* palette: crisp white (#FFFFFF), deep matte black (#111111), light border (#E5E5E5), nothing red (#FF2E2E) */
/* typography: space grotesk & jetbrains mono (lowercase) */

/* reset & base */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #ffffff;
  --bg-subtle: #fafafa;
  --bg-card: #ffffff;

  --border: #e5e5e5;
  --border-dark: #111111;

  --text: #111111;
  --text-muted: #555555;
  --text-dim: #888888;

  --red-accent: #ff2e2e;

  --font-sans: 'Space Grotesk', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container: 1120px;
  --nav-h: 58px;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg);
  color: var(--text);
}

body {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.loading {
  overflow: hidden;
}

/* dot matrix canvas background */
#dot-matrix-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

/* entrance diagonal dot wave loader */
.loader-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  transition: opacity 0.6s ease;
}

.loader-overlay.hidden {
  opacity: 0;
  visibility: hidden;
}

#loader-wave-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.loader-welcome {
  position: relative;
  z-index: 2;
  font-family: var(--font-sans);
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

/* folder-tab style navigation */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.05em;
}

/* folder tabs */
.folder-tabs {
  display: flex;
  gap: 4px;
  height: 100%;
  align-items: flex-end;
}

.tab-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: none;
  border: 1px solid var(--border);
  border-bottom: none;
  background: var(--bg-subtle);
  border-radius: 4px 4px 0 0;
  transition: all 0.2s ease;
}

.tab-item:hover,
.tab-item.active {
  color: var(--text);
  background: var(--bg);
  border-color: var(--border-dark);
}

.tab-num {
  color: var(--text-dim);
  font-size: 10px;
}

/* layout containers */
main {
  position: relative;
  z-index: 1;
  padding-top: var(--nav-h);
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.section-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.12em;
  margin-bottom: 36px;
}

.red-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--red-accent);
}

/* hero section */
.hero-section {
  padding: 60px 0 80px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

/* pfp wrapper */
.pfp-wrapper {
  position: relative;
  width: 72px;
  height: 72px;
  border-radius: 50%;
  cursor: pointer;
  margin-bottom: 24px;
}

.pfp-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
  border: 1px solid var(--border-dark);
  display: block;
}

#pfp-heart-canvas {
  position: absolute;
  top: -19px;
  left: -19px;
  width: 110px;
  height: 110px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.pfp-wrapper:hover #pfp-heart-canvas {
  opacity: 1;
}

.hero-tagline {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 0.08em;
  margin-bottom: 8px;
}

.hero-name {
  font-family: var(--font-sans);
  font-size: clamp(48px, 6vw, 84px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: 20px;
}

.hero-bio {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 460px;
  margin-bottom: 28px;
}

.hero-links {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
  transition: all 0.2s ease;
}

.btn-black {
  background: var(--text);
  color: var(--bg);
  border: 1px solid var(--text);
}

.btn-black:hover {
  background: #222;
}

.btn-ghost {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  border-color: var(--text);
}

.interest-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.tag {
  padding: 3px 8px;
  font-size: 10px;
  color: var(--text-muted);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
}

/* 3d draggable dot matrix card */
.cad-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 20px;
  transition: border-color 0.2s ease;
}

.cad-card:hover {
  border-color: var(--border-dark);
}

.cad-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 10px;
  color: var(--text-dim);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.red-indicator {
  color: var(--red-accent);
  font-size: 8px;
}

.cad-viewport {
  position: relative;
  background: #fafafa;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: grab;
  user-select: none;
}

.cad-viewport:active {
  cursor: grabbing;
}

#cad-3d-canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

.cad-hint {
  position: absolute;
  bottom: 8px;
  font-size: 9px;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.9);
  padding: 3px 8px;
  border: 1px solid var(--border);
  pointer-events: none;
}

.cad-footer {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  color: var(--text-dim);
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

/* about section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 28px;
}

.card-title {
  font-family: var(--font-sans);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.card-text {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 14px;
}

.pill-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

.pill {
  padding: 3px 8px;
  font-size: 10px;
  color: var(--text);
  background: var(--bg-subtle);
  border: 1px solid var(--border);
}

/* terminal card */
.terminal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 24px;
}

.term-header {
  font-size: 10px;
  color: var(--text-dim);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.term-body {
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-muted);
  min-height: 200px;
}

/* projects section */
.projects-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.2s ease;
}

.project-card:hover {
  border-color: var(--border-dark);
}

.project-card.featured {
  background: var(--bg-subtle);
  border-color: var(--border-dark);
}

.proj-meta {
  display: flex;
  justify-content: space-between;
  font-size: 9px;
  margin-bottom: 16px;
}

.proj-badge {
  padding: 2px 6px;
  background: var(--text);
  color: var(--bg);
}

.proj-date {
  color: var(--text-dim);
}

.proj-title {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

.proj-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.proj-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.proj-tags span {
  font-size: 9px;
  color: var(--text-dim);
  padding: 2px 6px;
  border: 1px solid var(--border);
  background: var(--bg);
}

/* ── HARDWARE SECTION ─────────────────────────────────────── */
.hardware-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hw-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 24px;
}

.hw-title {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.hw-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 12px;
  color: var(--text-muted);
}

/* contact section */
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 40px;
  max-width: 600px;
}

.contact-title {
  font-family: var(--font-sans);
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.contact-desc {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.c-link {
  display: flex;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--text);
  background: var(--bg-subtle);
  transition: all 0.2s ease;
}

.c-link:hover {
  border-color: var(--border-dark);
  background: var(--bg);
}

.c-type {
  font-size: 10px;
  color: var(--text-dim);
}

.c-val {
  font-weight: 700;
}

/* footer */
.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--border);
  font-size: 10px;
  color: var(--text-dim);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
}

/* responsive breakpoints */
@media (max-width: 900px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .hardware-grid {
    grid-template-columns: 1fr;
  }

  .folder-tabs {
    display: none;
  }
}