/* Portfolio / research project page — dark, readable, not template-y */

:root {
  --bg: #13151a;
  --bg-raised: #1a1d24;
  --bg-inset: #0f1115;
  --text: #dde1e8;
  --muted: #8b919c;
  --border: #2c3038;
  --border-light: #23262d;
  --link: #7eb8ff;
  --link-hover: #a8d0ff;
  --accent: #c9a227;
  --good: #5cb87a;
  --bad: #d4736a;
  --blue: #6eb5ff;
  --mono: "SF Mono", "Cascadia Code", "Consolas", monospace;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: system-ui, -apple-system, "Segoe UI", sans-serif;
  --max: min(1200px, calc(100vw - 48px));
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 16.5px;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: var(--link-hover); text-decoration: underline; }

/* ── header ── */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg-inset);
  padding: 36px 24px 28px;
}
.site-header .inner { max-width: var(--max); margin: 0 auto; }

.site-nav-top {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 12px;
}
.site-nav-top a { color: var(--link); }

.github-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-raised);
  text-decoration: none;
  transition: border-color 0.2s, background 0.2s;
}
.github-cta:hover {
  border-color: var(--link);
  background: #1e2229;
  text-decoration: none;
}
.github-cta-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}
.github-cta-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.github-cta-repo {
  font-family: var(--mono);
  font-size: 0.84rem;
  color: var(--link);
}
.github-cta-arrow {
  flex-shrink: 0;
  font-size: 1.1rem;
  color: var(--muted);
}
.github-cta:hover .github-cta-arrow { color: var(--link); }


.site-header .tagline {
  font-size: 0.82rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.site-header h1 {
  font-family: var(--serif);
  font-size: 1.75rem;
  font-weight: 600;
  line-height: 1.25;
  margin-bottom: 12px;
  color: var(--text);
}

.lead-summary {
  font-size: 1.05rem;
  color: #b8bcc6;
  max-width: none;
  margin-bottom: 16px;
}

.site-header .meta {
  font-size: 0.88rem;
  color: var(--muted);
  margin-bottom: 18px;
}

.site-header nav {
  font-size: 0.84rem;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}
.site-header nav a {
  color: var(--muted);
  text-decoration: none;
}
.site-header nav a:hover { color: var(--text); text-decoration: none; }

/* headline stats — simple row, not marketing cards */
.headline-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 0.88rem;
}
.headline-stats .item strong {
  display: block;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--good);
  font-family: var(--mono);
}
.headline-stats .item span { color: var(--muted); }

/* ── layout ── */
main { padding: 0 24px 72px; }
.container { max-width: var(--max); margin: 0 auto; }

section {
  padding: 44px 0;
  border-bottom: 1px solid var(--border-light);
}
section:last-child { border-bottom: none; }

h2 {
  font-family: var(--serif);
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text);
}

h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin: 18px 0 8px;
  color: var(--text);
}

p { margin-bottom: 12px; }

p.note {
  font-size: 0.9rem;
  color: var(--muted);
  border-left: 2px solid var(--border);
  padding-left: 14px;
  margin: 18px 0;
}

ul.plain {
  margin: 0 0 14px 1.15rem;
  font-size: 0.94rem;
}
ul.plain li { margin: 5px 0; color: #b8bcc6; }

/* insight list — numbered research takeaways */
ol.insights {
  margin: 0 0 16px 0;
  padding-left: 0;
  list-style: none;
  counter-reset: insight;
}
ol.insights li {
  counter-increment: insight;
  position: relative;
  padding: 12px 0 12px 36px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.94rem;
  color: #b8bcc6;
}
ol.insights li:last-child { border-bottom: none; }
ol.insights li::before {
  content: counter(insight);
  position: absolute;
  left: 0;
  top: 12px;
  width: 22px;
  height: 22px;
  border: 1px solid var(--border);
  border-radius: 50%;
  font-size: 0.72rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
}

/* skills row */
.skills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0;
}
.skills span {
  font-size: 0.75rem;
  font-family: var(--mono);
  padding: 3px 8px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--muted);
  background: var(--bg-raised);
}

code {
  font-family: var(--mono);
  font-size: 0.84em;
  background: var(--bg-raised);
  padding: 1px 6px;
  border-radius: 3px;
  color: #c5d0e0;
}

pre {
  font-family: var(--mono);
  font-size: 0.78rem;
  background: var(--bg-inset);
  border: 1px solid var(--border);
  padding: 14px;
  overflow-x: auto;
  margin: 12px 0;
  color: #b0b8c4;
}

/* figure */
figure {
  margin: 22px 0;
  border: 1px solid var(--border);
  background: var(--bg-raised);
}
figure img { width: 100%; display: block; }
figcaption {
  font-size: 0.84rem;
  color: var(--muted);
  padding: 10px 14px;
  border-top: 1px solid var(--border-light);
  line-height: 1.5;
}

/* tables */
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
  margin: 16px 0;
}
table.data th,
table.data td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
  vertical-align: top;
}
table.data th {
  background: var(--bg-raised);
  font-weight: 600;
  color: var(--muted);
  font-size: 0.8rem;
}
table.data tr.highlight td { background: rgba(92, 184, 122, 0.06); }
.bad { color: var(--bad); }
.good { color: var(--good); }

/* timeline / journey */
.journey {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  margin: 16px 0;
}
.journey-item {
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.9rem;
}
.journey-item:last-child { border-bottom: none; }
.journey-item .label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  margin-bottom: 4px;
}
.journey-item p { margin: 0; color: #b8bcc6; font-size: 0.9rem; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 16px 0;
}
@media (max-width: 640px) { .two-col { grid-template-columns: 1fr; } }

.col-box {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  padding: 14px 16px;
}
.col-box h3 { margin-top: 0; font-size: 0.9rem; }
.col-box.default { border-top: 2px solid var(--bad); }
.col-box.ours { border-top: 2px solid var(--good); }

/* artifact links */
.artifacts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 14px 0;
}
@media (max-width: 500px) { .artifacts { grid-template-columns: 1fr; } }
.artifact-link {
  display: block;
  padding: 12px 14px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  text-decoration: none;
  color: var(--text);
  font-size: 0.88rem;
}
.artifact-link:hover {
  border-color: #3d4450;
  background: var(--bg-inset);
  text-decoration: none;
  color: var(--text);
}
.artifact-link .kind {
  font-size: 0.72rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── diagrams (dark) ── */
.diagram {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  margin: 20px 0;
  overflow: hidden;
}
.diagram-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
  background: var(--bg-inset);
  font-size: 0.84rem;
}
.diagram-header strong { font-weight: 600; color: var(--text); }
.diag-controls { display: flex; align-items: center; gap: 8px; }
.diag-controls button {
  font-family: var(--sans);
  font-size: 0.78rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--text);
  cursor: pointer;
  border-radius: 3px;
}
.diag-controls button:hover { background: #252830; }
.diag-controls button:disabled { opacity: 0.5; cursor: default; }
.phase-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  min-width: 120px;
}
.diagram-body { padding: 16px 14px 18px; }
.diag-caption { font-size: 0.8rem; color: var(--muted); margin-bottom: 12px; }

.acc-label { font-size: 0.78rem; font-weight: 600; margin-bottom: 8px; color: var(--muted); }
.j-tiles { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 14px; }
.j-tile {
  border: 2px solid var(--border);
  background: var(--bg-inset);
  border-radius: 4px;
  padding: 8px 6px;
  min-width: 72px;
  text-align: center;
  font-size: 0.72rem;
  line-height: 1.3;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.j-tile .cols { font-family: var(--mono); font-size: 0.66rem; color: var(--muted); }

.j-tile.active-pass1 {
  border-color: #a85048;
  background: rgba(212, 115, 106, 0.15);
  box-shadow: 0 0 0 1px rgba(212, 115, 106, 0.3);
}
.j-tile.active-pass2 {
  border-color: #7a68a8;
  background: rgba(122, 104, 168, 0.15);
  box-shadow: 0 0 0 1px rgba(122, 104, 168, 0.3);
}
.j-tile.active-pass3,
.j-tile.done-pass3 {
  border-color: #4a9060;
  background: rgba(92, 184, 122, 0.12);
}
.j-tile.k-active {
  border-color: var(--blue);
  background: rgba(110, 181, 255, 0.1);
  box-shadow: 0 0 0 1px rgba(110, 181, 255, 0.25);
}
.j-tile.k-done {
  border-color: #4a9060;
  background: rgba(92, 184, 122, 0.1);
}

.lane-section {
  border-top: 1px dashed var(--border);
  padding-top: 12px;
  margin-top: 4px;
}
.lane-section .lane-title { font-size: 0.76rem; color: var(--muted); margin-bottom: 6px; }
.lanes { display: grid; grid-template-columns: repeat(16, 1fr); gap: 3px; }
.lane {
  height: 26px;
  border: 1px solid var(--border);
  background: var(--bg-inset);
  font-family: var(--mono);
  font-size: 0.52rem;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  transition: background 0.12s, color 0.12s;
}
.lane.lit-pass1 { background: rgba(212, 115, 106, 0.35); color: #f0c4c0; }
.lane.lit-pass2 { background: rgba(122, 104, 168, 0.35); color: #d4c8f0; }
.lane.lit-pass3 { background: rgba(92, 184, 122, 0.35); color: #c0e8cc; }
.lane.lit-iexp { background: rgba(110, 181, 255, 0.3); color: #c0ddf8; }

.pass-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.73rem;
  margin-top: 10px;
  color: var(--muted);
}
.pass-legend span::before {
  content: '';
  display: inline-block;
  width: 9px; height: 9px;
  margin-right: 5px;
  border-radius: 2px;
  vertical-align: middle;
}
.pass-legend .p1::before { background: #a85048; }
.pass-legend .p2::before { background: #7a68a8; }
.pass-legend .p3::before { background: #4a9060; }

.online-layout {
  display: grid;
  grid-template-columns: 1fr 36px 1fr;
  gap: 8px;
  align-items: center;
  margin-top: 12px;
}
@media (max-width: 560px) {
  .online-layout { grid-template-columns: 1fr; }
  .online-arrow { display: none; }
}
.state-box {
  border: 1px solid var(--border);
  padding: 12px;
  background: var(--bg-inset);
  font-family: var(--mono);
  font-size: 0.76rem;
  line-height: 1.7;
}
.state-box .reg { color: var(--muted); }
.state-box .val { color: var(--text); font-weight: 600; }
.state-box .val.changed { color: var(--good); animation: flash 0.4s ease; }
.state-box .hint { margin-top: 8px; font-size: 0.7rem; color: var(--muted); }
@keyframes flash {
  0% { background: rgba(92, 184, 122, 0.25); }
  100% { background: transparent; }
}
.spad-box {
  border: 1px solid var(--border);
  padding: 12px;
  background: rgba(92, 184, 122, 0.05);
  font-size: 0.76rem;
}
.spad-box h4 { font-size: 0.72rem; font-weight: 600; margin-bottom: 8px; color: var(--good); }
.spad-chunks { display: flex; flex-wrap: wrap; gap: 4px; }
.spad-chunk {
  border: 1px solid var(--border);
  padding: 4px 6px;
  font-family: var(--mono);
  font-size: 0.63rem;
  background: var(--bg-inset);
  color: var(--muted);
  min-width: 52px;
  text-align: center;
}
.spad-chunk.written {
  background: rgba(92, 184, 122, 0.15);
  color: var(--good);
  border-color: #4a9060;
}
.online-arrow { text-align: center; font-size: 1.1rem; color: var(--muted); }

.formula-block {
  font-family: var(--serif);
  font-size: 0.92rem;
  text-align: center;
  padding: 12px;
  margin: 14px 0;
  border: 1px solid var(--border-light);
  background: var(--bg-inset);
  color: #b8bcc6;
}

footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 28px 24px 40px;
  font-size: 0.84rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}
footer a { color: var(--muted); }
footer a:hover { color: var(--link); }

.citation {
  font-size: 0.82rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border-light);
}

/* ── fusion pipelines ── */
.fusion-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin: 18px 0;
}
.fusion-card {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  padding: 14px 16px;
}
.fusion-card.highlight {
  border-color: #4a9060;
  background: rgba(92, 184, 122, 0.04);
}
.fusion-card.partial {
  border-color: var(--accent);
  background: rgba(201, 162, 39, 0.04);
}
.fusion-card.baseline {
  border-color: var(--bad);
  background: rgba(212, 115, 106, 0.04);
}
.fusion-card .fc-title {
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.fusion-card .fc-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  padding: 2px 7px;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--muted);
  font-weight: 500;
}
.pipeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 5px;
  font-size: 0.78rem;
  margin: 8px 0;
}
.pstep {
  padding: 5px 9px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.72rem;
  white-space: nowrap;
}
.ps-matmul { border-color: var(--blue); color: var(--blue); background: rgba(110,181,255,0.08); }
.ps-softmax { border-color: #a08050; color: #d4b880; background: rgba(160,128,80,0.1); }
.ps-dram { border-color: var(--bad); color: #e8a8a0; background: rgba(212,115,106,0.12); }
.ps-spad { border-color: var(--good); color: #8fd4a4; background: rgba(92,184,122,0.1); }
.ps-hw { border-color: #8a7ac8; color: #c4b8e8; background: rgba(138,122,200,0.1); }
.ps-acc { border-color: #6a9ec8; color: #a8cce8; background: rgba(106,158,200,0.08); }
.parrow { color: var(--muted); font-size: 0.85rem; }
.fusion-card .fc-note {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 8px;
  margin-bottom: 0;
}

.two-pillars {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 18px 0;
}
@media (max-width: 600px) { .two-pillars { grid-template-columns: 1fr; } }
.pillar {
  border: 1px solid var(--border);
  padding: 16px;
  background: var(--bg-raised);
}
.pillar h3 { margin-top: 0; font-size: 0.95rem; }
.pillar.p1 { border-top: 2px solid var(--accent); }
.pillar.p2 { border-top: 2px solid var(--good); }

/* ── performance charts ── */
.perf-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.perf-tab {
  font-size: 0.78rem;
  padding: 5px 12px;
  border: 1px solid var(--border);
  background: var(--bg-raised);
  color: var(--muted);
  cursor: pointer;
  border-radius: 3px;
  font-family: var(--sans);
}
.perf-tab.active {
  border-color: var(--good);
  color: var(--text);
  background: rgba(92, 184, 122, 0.08);
}
.perf-panel { display: none; }
.perf-panel.active { display: block; }

.perf-chart { margin: 16px 0; }
.perf-row {
  display: grid;
  grid-template-columns: 100px 1fr 72px;
  gap: 10px;
  align-items: center;
  margin-bottom: 10px;
  font-size: 0.82rem;
}
@media (max-width: 480px) {
  .perf-row { grid-template-columns: 80px 1fr 60px; font-size: 0.75rem; }
}
.perf-row .label { color: var(--muted); }
.perf-row .bar-wrap {
  height: 22px;
  background: var(--bg-inset);
  border: 1px solid var(--border-light);
  border-radius: 2px;
  overflow: hidden;
}
.perf-row .bar {
  height: 100%;
  border-radius: 1px;
  transition: width 0.5s ease;
}
.perf-row .bar.bl { background: #6a7585; }
.perf-row .bar.e1 { background: #a08050; }
.perf-row .bar.e5 { background: var(--good); }
.perf-row .val {
  font-family: var(--mono);
  font-size: 0.78rem;
  text-align: right;
}
.perf-row .val.win { color: var(--good); font-weight: 600; }

.speedup-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 20px 0;
}
@media (max-width: 560px) { .speedup-cards { grid-template-columns: 1fr; } }
.speedup-card {
  border: 1px solid var(--border);
  background: var(--bg-raised);
  padding: 16px;
  text-align: center;
}
.speedup-card .seq { font-size: 0.75rem; color: var(--muted); margin-bottom: 4px; }
.speedup-card .mult {
  font-size: 1.75rem;
  font-weight: 600;
  font-family: var(--mono);
  color: var(--good);
}
.speedup-card .detail {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 6px;
  font-family: var(--mono);
}

/* analysis / limitations */
.limit-box {
  border: 1px solid var(--border);
  background: var(--bg-inset);
  padding: 16px 18px;
  margin: 18px 0;
  font-size: 0.88rem;
}
.limit-box h3 {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--muted);
}
.limit-box ul {
  margin: 0 0 0 1.1rem;
  color: #b8bcc6;
}
.limit-box li { margin: 5px 0; }

.formula-inline {
  font-family: var(--mono);
  font-size: 0.82rem;
  background: var(--bg-inset);
  border: 1px solid var(--border-light);
  padding: 10px 14px;
  margin: 12px 0;
  color: #b8bcc6;
  overflow-x: auto;
}