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

:root {
  --bg: #080808;
  --bg2: #0f0f0f;
  --bg3: #141414;
  --surface: #1a1a1a;
  --border: rgba(255, 255, 255, 0.07);
  --border2: rgba(255, 255, 255, 0.12);
  --text: #f0ede8;
  --muted: rgba(240, 237, 232, 0.45);
  --faint: rgba(240, 237, 232, 0.2);
  --accent: #a8ff78;
  --accent2: #78ffdc;
  --mono: "JetBrains Mono", monospace;
  --sans: "DM Sans", sans-serif;
  --display: "Syne", sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  overflow-x: hidden;
  cursor: none;
}

img,
svg,
video {
  max-width: 100%;
}

/* Noise */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 512 512' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.6;
}

/* Cursor */
.cursor {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9999;
  mix-blend-mode: difference;
}
.cursor-ring {
  width: 32px;
  height: 32px;
  border: 1px solid rgba(168, 255, 120, 0.35);
  border-radius: 50%;
  position: fixed;
  pointer-events: none;
  z-index: 9998;
  transition: all 0.15s ease;
}

/* Nav */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  background: rgba(8, 8, 8, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}
.nav-logo {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.nav-back {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.2s;
}
.nav-back:hover {
  color: var(--accent);
}
.nav-back svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
  transition: transform 0.2s;
}
.nav-back:hover svg {
  transform: translateX(-3px);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}
.rd1 {
  transition-delay: 0.1s;
}
.rd2 {
  transition-delay: 0.2s;
}
.rd3 {
  transition-delay: 0.3s;
}
.rd4 {
  transition-delay: 0.4s;
}

/* ─── HERO HEADER ─── */
.proj-header {
  padding: 9rem 3rem 0;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}
.proj-breadcrumb {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--faint);
  letter-spacing: 0.08em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}
.proj-breadcrumb span {
  color: var(--accent);
}
.proj-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
}
.proj-title {
  font-family: var(--display);
  font-size: clamp(2.8rem, 6vw, 5.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
  max-width: 700px;
}
.proj-title em {
  font-style: normal;
  color: var(--accent);
}
.proj-title-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-end;
  padding-top: 0.5rem;
  flex-shrink: 0;
}
.proj-link-btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  padding: 0.6rem 1.4rem;
  border-radius: 2px;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  white-space: nowrap;
  transition: all 0.2s;
}
.proj-link-btn.primary {
  background: var(--accent);
  color: var(--bg);
  font-weight: 500;
}
.proj-link-btn.primary:hover {
  opacity: 0.85;
}
.proj-link-btn.ghost {
  border: 1px solid var(--border2);
  color: var(--muted);
}
.proj-link-btn.ghost:hover {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.25);
}
.proj-link-btn svg {
  width: 12px;
  height: 12px;
  stroke: currentColor;
  fill: none;
}

/* Meta strip */
.proj-meta-strip {
  display: flex;
  gap: 0;
  margin-top: 3.5rem;
  border: 1px solid var(--border);
  border-left: none;
}
.meta-cell {
  flex: 1;
  padding: 1.25rem 1.75rem;
  border-left: 1px solid var(--border);
  min-width: 0;
}
.meta-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}
.meta-value {
  font-family: var(--display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
}
.meta-value.accent {
  color: var(--accent);
}

/* ─── HERO VISUAL ─── */
.proj-visual-wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 3rem;
  position: relative;
  z-index: 1;
  margin-top: 3rem;
}
.proj-visual-main {
  background: var(--bg3);
  border: 1px solid var(--border);
  height: 420px;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}
/* Architecture diagram drawn in SVG */
.arch-svg {
  width: 100%;
  max-width: 800px;
}

/* ─── BODY CONTENT ─── */
.proj-body {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 3rem;
  position: relative;
  z-index: 1;
}

/* Overview + stats */
.overview-section {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 5rem;
  padding: 5rem 0;
  border-bottom: 1px solid var(--border);
}
.section-kicker {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.section-kicker::after {
  content: "";
  width: 30px;
  height: 1px;
  background: var(--accent);
  opacity: 0.4;
}
.overview-heading {
  font-family: var(--display);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 1.25rem;
}
.overview-body p {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 1rem;
}
.overview-body p strong {
  color: var(--text);
  font-weight: 400;
}
.stats-col {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.stat-row {
  background: var(--bg2);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}
.stat-big {
  font-family: var(--display);
  font-size: 2.8rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
}
.stat-big .unit {
  font-size: 1.5rem;
  color: var(--accent);
}
.stat-caption {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--faint);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-top: 0.35rem;
}

/* Challenge + Solution */
.two-col-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin: 4rem 0;
}
.two-col-cell {
  background: var(--bg2);
  padding: 2.5rem;
}
.two-col-cell h3 {
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1.25rem;
}
.two-col-cell.challenge h3 {
  color: rgba(255, 120, 120, 0.85);
}
.two-col-cell.solution h3 {
  color: var(--accent);
}
.point-list {
  list-style: none;
}
.point-list li {
  font-size: 0.87rem;
  color: var(--muted);
  line-height: 1.65;
  padding: 0.6rem 0 0.6rem 1.3rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.point-list li:last-child {
  border-bottom: none;
}
.point-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--faint);
}
.solution .point-list li::before {
  background: rgba(168, 255, 120, 0.5);
}

/* Tech stack section */
.tech-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.tech-section-heading {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2.5rem;
}
.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.tech-card {
  background: var(--bg2);
  padding: 1.75rem;
  transition: background 0.25s;
}
.tech-card:hover {
  background: var(--bg3);
}
.tech-icon {
  font-family: var(--mono);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--accent);
  margin-bottom: 0.75rem;
  line-height: 1;
}
.tech-icon img {
  width: 28px;
  height: 28px;
  display: block;
  filter: invert(100%) brightness(120%);
}
.tech-name {
  font-family: var(--display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.35rem;
}
.tech-desc {
  font-size: 0.78rem;
  color: var(--faint);
  line-height: 1.5;
}

/* Code spotlight */
.code-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.code-section-heading {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}
.code-tabs {
  display: flex;
  gap: 0;
  border: 1px solid var(--border);
  border-bottom: none;
}
.code-tab {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.75rem 1.25rem;
  color: var(--faint);
  cursor: pointer;
  border-right: 1px solid var(--border);
  transition: all 0.2s;
}
.code-tab:last-child {
  border-right: none;
}
.code-tab.active {
  color: var(--accent);
  background: var(--bg3);
}
.code-panel {
  display: none;
}
.code-panel.active {
  display: block;
}
.code-window {
  border: 1px solid var(--border);
  background: var(--bg3);
  overflow: hidden;
}
.code-window-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}
.code-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.cd1 {
  background: #ff5f57;
}
.cd2 {
  background: #febc2e;
}
.cd3 {
  background: #28c840;
}
.code-file {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--faint);
  margin-left: 0.5rem;
  letter-spacing: 0.04em;
}
pre {
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.75;
  padding: 1.75rem;
  overflow-x: auto;
  color: rgba(240, 237, 232, 0.65);
  tab-size: 2;
}
.kw {
  color: #a8ff78;
}
.fn {
  color: #78ffdc;
}
.str {
  color: #ffc87a;
}
.cm {
  color: rgba(240, 237, 232, 0.25);
  font-style: italic;
}
.tp {
  color: #e0a0ff;
}
.nm {
  color: #f0ede8;
}

/* Timeline */
.timeline-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.timeline-section-heading {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2.5rem;
}
.timeline {
  position: relative;
  padding-left: 2rem;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: var(--border);
}
.tl-item {
  position: relative;
  padding-bottom: 2.5rem;
}
.tl-item:last-child {
  padding-bottom: 0;
}
.tl-dot {
  position: absolute;
  left: -2.35rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border2);
}
.tl-item.done .tl-dot {
  background: var(--accent);
  border-color: var(--accent);
}
.tl-sprint {
  font-family: var(--mono);
  font-size: 0.67rem;
  color: var(--faint);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}
.tl-event {
  font-family: var(--display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.4rem;
}
.tl-detail {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.6;
  max-width: 560px;
}

/* Outcomes */
.outcomes-section {
  padding: 4rem 0;
  border-bottom: 1px solid var(--border);
}
.outcomes-heading {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2.5rem;
}
.outcomes-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.outcome-card {
  background: var(--bg2);
  padding: 2rem;
  transition: background 0.25s;
}
.outcome-card:hover {
  background: var(--bg3);
}
.outcome-num {
  font-family: var(--display);
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.outcome-label {
  font-size: 0.88rem;
  color: var(--muted);
  line-height: 1.55;
}
.outcome-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  padding: 0.2rem 0.6rem;
  background: rgba(168, 255, 120, 0.08);
  border: 1px solid rgba(168, 255, 120, 0.2);
  color: var(--accent);
  border-radius: 2px;
  margin-top: 0.6rem;
}

/* More projects */
.more-section {
  padding: 4rem 0 6rem;
}
.more-heading {
  font-family: var(--display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 2rem;
}
.more-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.more-card {
  background: var(--bg2);
  padding: 1.75rem;
  transition: background 0.25s;
  text-decoration: none;
  display: block;
}
.more-card:hover {
  background: var(--bg3);
}
.more-num {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--faint);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.more-name {
  font-family: var(--display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 0.5rem;
}
.more-desc {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
  margin-bottom: 1rem;
}
.more-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}
.more-tag {
  font-family: var(--mono);
  font-size: 0.63rem;
  padding: 0.18rem 0.55rem;
  background: var(--surface);
  color: var(--faint);
  border-radius: 2px;
}
.more-arrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--accent);
  margin-top: 1rem;
  display: block;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  position: relative;
  z-index: 1;
  padding: 2.5rem 3rem;
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-name {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.02em;
}
.footer-copy {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--faint);
}
.footer-back {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
}
.footer-back:hover {
  color: var(--accent);
}

@media (max-width: 900px) {
  nav {
    padding: 1.2rem 1.5rem;
  }
  .proj-header,
  .proj-visual-wrap,
  .proj-body {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
  .proj-title-row {
    flex-direction: column;
  }
  .proj-title-links {
    flex-direction: row;
    align-items: flex-start;
  }
  .proj-meta-strip {
    flex-wrap: wrap;
  }
  .overview-section {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .two-col-section {
    grid-template-columns: 1fr;
  }
  .tech-grid {
    grid-template-columns: 1fr 1fr;
  }
  .outcomes-grid {
    grid-template-columns: 1fr 1fr;
  }
  .more-grid {
    grid-template-columns: 1fr;
  }
  footer {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }
  body {
    cursor: auto;
  }
  .cursor,
  .cursor-ring {
    display: none;
  }
}

@media (max-width: 640px) {
  nav {
    padding: 1rem 1.1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
  }
  .nav-back {
    width: 100%;
    justify-content: flex-end;
    font-size: 0.7rem;
  }

  .proj-header {
    padding: 7.25rem 1.1rem 0;
  }
  .proj-title {
    font-size: clamp(2.3rem, 12vw, 3.8rem);
  }
  .proj-title-links {
    width: 100%;
    flex-direction: column;
    align-items: stretch;
  }
  .proj-link-btn {
    justify-content: center;
    width: 100%;
  }
  .proj-meta-strip {
    flex-direction: column;
    border-left: 1px solid var(--border);
    margin-top: 2.5rem;
  }
  .meta-cell {
    border-left: none;
    border-top: 1px solid var(--border);
    padding: 1rem 1.1rem;
  }
  .meta-cell:first-child {
    border-top: none;
  }

  .proj-body,
  .proj-visual-wrap {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }
  .overview-section {
    padding: 3.5rem 0;
  }
  .overview-heading {
    font-size: 1.45rem;
  }
  .overview-body p {
    font-size: 0.9rem;
  }
  .stats-col,
  .two-col-section,
  .tech-grid,
  .outcomes-grid,
  .more-grid {
    width: 100%;
  }
  .stat-row,
  .two-col-cell,
  .tech-card,
  .outcome-card,
  .more-card {
    padding: 1.25rem;
  }
  .two-col-cell h3,
  .tech-section-heading,
  .code-section-heading,
  .timeline-section-heading,
  .outcomes-heading,
  .more-heading {
    font-size: 1.2rem;
  }
  .point-list li {
    font-size: 0.84rem;
  }
  .tech-grid,
  .outcomes-grid,
  .more-grid {
    grid-template-columns: 1fr;
  }
  .tech-section,
  .code-section,
  .timeline-section,
  .outcomes-section {
    padding: 3rem 0;
  }
  .code-tabs {
    display: grid;
    grid-template-columns: 1fr;
  }
  .code-tab {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
  .code-tab:last-child {
    border-bottom: none;
  }
  pre {
    font-size: 0.7rem;
    padding: 1.25rem;
    line-height: 1.7;
  }
  .timeline {
    padding-left: 1.4rem;
  }
  .tl-dot {
    left: -1.75rem;
  }
  footer {
    padding: 2rem 1.1rem;
    flex-direction: column;
    gap: 0.85rem;
    text-align: center;
  }
}

@media (max-width: 420px) {
  .proj-title-links {
    gap: 0.55rem;
  }
  .proj-link-btn {
    font-size: 0.7rem;
    padding: 0.55rem 1rem;
  }
  .proj-breadcrumb {
    font-size: 0.66rem;
    line-height: 1.5;
  }
  .meta-value {
    font-size: 0.88rem;
  }
  .stat-big {
    font-size: 2.3rem;
  }
  .tech-name,
  .more-name {
    font-size: 0.92rem;
  }
  .tl-event {
    font-size: 0.95rem;
  }
}