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

:root {
  --bg: #faf6f1;
  --bg-warm: #f5ede4;
  --text: #1a1410;
  --text-muted: #6b5c4c;
  --accent: #d97706;
  --accent-warm: #b45309;
  --border: #e8ddd0;
  --card-bg: #fff8f0;
  --card-border: #e8ddd0;
  --code-bg: #f0e8dc;
  --glow: rgba(217, 119, 6, 0.15);
  --font-body: 'Inter', -apple-system, sans-serif;
  --font-serif: 'Newsreader', Georgia, serif;
  --max-width: 720px;
}

[data-theme="dark"] {
  --bg: #1c1710;
  --bg-warm: #231c14;
  --text: #f0e8dc;
  --text-muted: #a89580;
  --accent: #f59e0b;
  --accent-warm: #fbbf24;
  --border: #3d3225;
  --card-bg: #261f17;
  --card-border: #3d3225;
  --code-bg: #2d2419;
  --glow: rgba(245, 158, 11, 0.1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
  transition: background 0.4s ease, color 0.4s ease;
  overflow-x: hidden;
  position: relative;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 24px 40px;
  position: relative;
  z-index: 2;
}

/* ============================================
   PRELOADER / INTRO
   ============================================ */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: #0a0806;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  transition: opacity 0.5s ease, transform 0.5s ease;
  overflow: hidden;
}

.preloader.done {
  opacity: 0;
  transform: scale(1.02);
  pointer-events: none;
}

.preloader-center {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

/* Flashing equations / terms in background */
.preloader-flashes {
  position: absolute;
  inset: 0;
  z-index: 1;
  overflow: hidden;
}

.flash-item {
  position: absolute;
  font-family: 'SF Mono', 'Fira Code', monospace;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  animation: flashPop 2.5s ease forwards;
}

.flash-item.equation {
  font-size: 1.1rem;
  color: rgba(217, 119, 6, 0.6);
  font-weight: 500;
  text-shadow: 0 0 20px rgba(217, 119, 6, 0.3);
}

.flash-item.term {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.35);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 600;
}

.flash-item.diagram {
  font-size: 0.85rem;
  color: rgba(217, 119, 6, 0.4);
  letter-spacing: 0.5px;
}

@keyframes flashPop {
  0% { opacity: 0; transform: scale(0.8) translateY(10px); filter: blur(4px); }
  10% { opacity: 1; transform: scale(1) translateY(0); filter: blur(0px); }
  60% { opacity: 1; transform: scale(1) translateY(0); filter: blur(0px); }
  100% { opacity: 0; transform: scale(1.05) translateY(-8px); filter: blur(2px); }
}

#loss-canvas {
  border-radius: 8px;
  opacity: 0.9;
}

.preloader-loss {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
  letter-spacing: 1px;
  color: var(--accent);
  text-align: center;
}

.preloader-bar {
  width: 200px;
  height: 2px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
  margin-top: 8px;
}

.preloader-progress {
  height: 100%;
  width: 0%;
  background: var(--accent);
  border-radius: 2px;
  transition: width 0.05s linear;
}

/* Page content hidden until intro completes */
.page-content {
  opacity: 0;
}

.page-content.revealed {
  opacity: 1;
}

/* Fast cascade entrance for elements */
.cascade {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cascade.in {
  opacity: 1;
  transform: translateY(0);
}

/* Neural network canvas — sits behind everything */
#neural-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

/* Warm ambient glow */
.ambient-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
  top: -200px;
  right: -200px;
  animation: drift 25s ease-in-out infinite;
}

.ambient-glow-2 {
  top: auto;
  bottom: -200px;
  left: -200px;
  right: auto;
  animation-delay: -12s;
  width: 500px;
  height: 500px;
  opacity: 0.7;
}

@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, 20px) scale(1.05); }
  66% { transform: translate(-20px, -15px) scale(0.95); }
}

/* ============================================
   NAME ANIMATION — CIPHER DECODE
   ============================================ */
.name {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.5px;
  min-height: 1.3em;
}

.name .char {
  display: inline-block;
  transition: color 0.1s;
}

.name .char.decoding {
  color: var(--accent);
  font-family: 'SF Mono', 'Courier New', monospace;
  font-weight: 400;
}

.name .char.decoded {
  color: var(--text);
  font-family: var(--font-serif);
  font-weight: 600;
}

.name .char.space {
  width: 0.3em;
}

/* Tagline fades in after name */
#animated-tagline {
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

#animated-tagline.visible {
  opacity: 1;
  transform: translateY(0);
}

.tagline {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--text-muted);
  margin-top: 4px;
}

.tagline .accent {
  color: var(--accent);
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

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

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

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 32px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 20px;
  padding-top: 8px;
}

.header-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s;
  position: relative;
}

.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.header-nav a:hover::after {
  width: 100%;
}

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

.theme-toggle {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
  transition: color 0.2s, transform 0.3s;
}

.theme-toggle:hover {
  color: var(--accent);
  transform: rotate(20deg);
}

/* Bio */
.bio {
  margin-bottom: 48px;
}

.bio p {
  color: var(--text);
  font-size: 0.95rem;
  margin-bottom: 12px;
  line-height: 1.8;
}

.bio code,
.bio .code-link {
  background: var(--code-bg);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.85rem;
  font-family: 'SF Mono', 'Fira Code', monospace;
  border: 1px solid var(--border);
  transition: all 0.2s;
  text-decoration: none;
  color: inherit;
}

.bio code:hover,
.bio .code-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.social-icons {
  display: flex;
  gap: 14px;
  margin-top: 20px;
}

.social-icons a {
  color: var(--text-muted);
  transition: color 0.2s, transform 0.2s;
  padding: 6px;
  border-radius: 6px;
}

.social-icons a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

/* Sections */
.section {
  margin-bottom: 48px;
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

/* Experiences */
.experience-list {
  display: flex;
  flex-direction: column;
}

.experience-item {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 24px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.experience-item:hover {
  padding-left: 8px;
  border-bottom-color: var(--accent);
}

.exp-left {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.exp-role {
  font-weight: 500;
  font-size: 0.95rem;
}

.exp-company {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-decoration: none;
  transition: color 0.2s;
}

a.exp-company:hover {
  color: var(--accent);
}

.exp-product {
  color: var(--text-muted);
  font-size: 0.85rem;
  opacity: 0.85;
  text-decoration: none;
  transition: color 0.2s;
}

a.exp-product:hover {
  color: var(--accent);
  opacity: 1;
}

.exp-desc {
  grid-column: 1 / -1;
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 2px;
}

.exp-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
  text-align: right;
  text-decoration: none;
}

a.exp-date:hover {
  color: var(--accent);
}

/* Writings */
.writings-list {
  display: flex;
  flex-direction: column;
}

.writing-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: all 0.3s ease;
}

.writing-item:hover {
  padding-left: 12px;
  border-bottom-color: var(--accent);
}

.writing-title {
  color: var(--text);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.writing-item:hover .writing-title {
  color: var(--accent);
}

.writing-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  white-space: nowrap;
  margin-left: 20px;
}

/* Projects */
.projects-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.project-card {
  padding: 24px;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  background: var(--card-bg);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.project-card:hover::before {
  transform: scaleX(1);
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px var(--glow);
}

.project-card.featured {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--card-bg), rgba(217, 119, 6, 0.04));
}

.project-status {
  font-size: 0.75rem;
  color: #16a34a;
  font-weight: 500;
  margin-bottom: 8px;
}

.project-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.project-num {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.project-status-text {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.project-name {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.project-desc {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-bottom: 12px;
  line-height: 1.6;
}

.project-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 4px;
  transition: all 0.2s;
}

.project-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--glow);
}

.project-links-row {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.project-tech span {
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: all 0.2s;
}

.project-tech span:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Skills */
.skills-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.skills-tags span {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  transition: all 0.25s ease;
  cursor: default;
}

.skills-tags span:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--glow);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--glow);
}

/* GitHub Contribution Graph */
.github-graph {
  overflow-x: auto;
}

.graph-months {
  display: flex;
  gap: 0;
  margin-bottom: 6px;
}

.graph-months span {
  font-size: 0.7rem;
  color: var(--text-muted);
  width: calc(100% / 12);
  text-align: center;
}

.graph-grid {
  display: grid;
  grid-template-columns: repeat(52, 1fr);
  grid-template-rows: repeat(7, 1fr);
  gap: 3px;
  grid-auto-flow: column;
}

.graph-cell {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 2px;
  background: var(--border);
  min-width: 10px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.graph-cell:hover {
  transform: scale(1.8);
  z-index: 10;
  position: relative;
}

.graph-cell.level-1 { background: #d4a574; }
.graph-cell.level-2 { background: #b8860b; }
.graph-cell.level-3 { background: #996515; }
.graph-cell.level-4 { background: #7a4f0c; }

[data-theme="dark"] .graph-cell { background: #2d2419; }
[data-theme="dark"] .graph-cell.level-1 { background: #4a3520; }
[data-theme="dark"] .graph-cell.level-2 { background: #6b4c1a; }
[data-theme="dark"] .graph-cell.level-3 { background: #8b6914; }
[data-theme="dark"] .graph-cell.level-4 { background: #d97706; }

.graph-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
}

.graph-link {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
}

.graph-link:hover {
  text-decoration: underline;
  color: var(--accent);
}

.graph-legend {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  color: var(--text-muted);
}

.legend-box {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--border);
}

.legend-box.level-1 { background: #d4a574; }
.legend-box.level-2 { background: #b8860b; }
.legend-box.level-3 { background: #996515; }
.legend-box.level-4 { background: #7a4f0c; }

[data-theme="dark"] .legend-box { background: #2d2419; }
[data-theme="dark"] .legend-box.level-1 { background: #4a3520; }
[data-theme="dark"] .legend-box.level-2 { background: #6b4c1a; }
[data-theme="dark"] .legend-box.level-3 { background: #8b6914; }
[data-theme="dark"] .legend-box.level-4 { background: #d97706; }

/* Contact */
.contact-text {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.contact-text a {
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--accent);
  transition: color 0.2s;
}

.contact-text a:hover {
  color: var(--accent);
}

/* Footer */
.footer {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
}

.footer p {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Cursor dot */
.cursor-dot {
  position: fixed;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  opacity: 0;
  transition: opacity 0.3s;
}

body:hover .cursor-dot {
  opacity: 0.6;
}

/* Emoji Animation */
@keyframes emojiFloat {
  0% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  100% {
    opacity: 0;
    transform: translateY(-120px) scale(0.5);
  }
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: 32px 16px 24px;
  }

  .header {
    flex-direction: column;
    gap: 16px;
  }

  .header-nav {
    gap: 16px;
  }

  .name {
    font-size: 1.8rem;
  }

  .experience-item {
    grid-template-columns: 1fr;
  }

  .exp-date {
    text-align: left;
  }

  .writing-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 2px;
  }

  .writing-date {
    margin-left: 0;
  }

  .graph-grid {
    grid-template-columns: repeat(26, 1fr);
  }

  .cursor-dot {
    display: none;
  }
}