/* Sharp3D project page — inspired by academic project landing templates */

:root {
  --bg: #f4f6fb;
  --bg-elevated: #ffffff;
  --text: #1a1d26;
  --text-muted: #5c6370;
  --accent: #2563eb;
  --accent-soft: rgba(37, 99, 235, 0.12);
  --border: rgba(15, 23, 42, 0.08);
  --shadow: 0 18px 50px rgba(15, 23, 42, 0.08);
  --radius: 14px;
  --hero-gradient: linear-gradient(135deg, #0f172a 0%, #1e3a8a 45%, #4338ca 100%);
  --code-bg: #0f172a;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  transition: background 0.25s ease, color 0.25s ease;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: ui-monospace, "Cascadia Code", "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.9em;
  padding: 0.12em 0.35em;
  border-radius: 6px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
}

img,
video {
  max-width: 100%;
  display: block;
  border-radius: calc(var(--radius) - 4px);
}

.container {
  width: min(1120px, 100% - 2.5rem);
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(12px);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  align-items: center;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.25rem 0;
}

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

.hero {
  background: var(--hero-gradient);
  color: #f8fafc;
  padding: 3.25rem 0 3.75rem;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.12), transparent 45%),
    radial-gradient(circle at 80% 0%, rgba(96, 165, 250, 0.25), transparent 40%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  margin-bottom: 1rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero-sub {
  margin: 0 auto 1.5rem;
  max-width: 42rem;
  font-size: 1.05rem;
  color: rgba(248, 250, 252, 0.88);
}

.hero code {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.28);
  color: #f8fafc;
}

.authors {
  font-size: 0.98rem;
  color: rgba(248, 250, 252, 0.9);
  margin-bottom: 1.25rem;
}

.authors span {
  white-space: nowrap;
}

.venue {
  font-size: 0.95rem;
  color: rgba(226, 232, 240, 0.85);
  margin-bottom: 1.5rem;
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  background: #f8fafc;
  color: #0f172a;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  background: #e2e8f0;
}

.btn-ghost {
  background: rgba(15, 23, 42, 0.35);
  color: #f8fafc;
  border-color: rgba(248, 250, 252, 0.35);
}

.btn-ghost:hover {
  background: rgba(15, 23, 42, 0.55);
}

section {
  padding: 3.25rem 0;
}

.section-title {
  font-size: 1.45rem;
  margin: 0 0 0.35rem;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0 0 1.5rem;
  color: var(--text-muted);
  max-width: none;
}

.section-lead strong {
  color: var(--text);
  font-weight: 600;
}
.results-render-note {
  margin: -0.5rem 0 1.25rem;
  padding: 0.85rem 1rem;
  border-radius: calc(var(--radius) - 4px);
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--accent) 6%, var(--bg-elevated));
  font-size: 0.9rem;
  line-height: 1.55;
  color: var(--text-muted);
}

.results-render-note strong {
  color: var(--text);
  font-weight: 600;
}

.results-render-note code {
  font-size: 0.88em;
}


.card-surface {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}


.results-thumb-img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  vertical-align: middle;
}

@media (min-width: 780px) {
  .results-thumb-btn .results-thumb-img {
    flex: 1 1 auto;
    width: 100%;
    height: 100%;
    min-height: 0;
    aspect-ratio: auto;
  }
}

@media (max-width: 779px) {
  .results-thumbs--count-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .results-thumbs--count-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .results-thumbs--count-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  @media (max-width: 420px) {
    .results-thumbs--count-3 {
      grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .results-thumbs--count-3 .results-thumb-btn:last-child {
      grid-column: 1 / -1;
      max-width: calc(50% - 0.25rem);
      justify-self: center;
    }
  }
}



.results-viewer-idle {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.results-viewer-frame:not(.is-loading):not(.is-loaded) .results-viewer-idle {
  display: flex;
}

.results-load-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.7rem 1.35rem;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, rgba(255, 255, 255, 0.2));
  border-radius: calc(var(--radius) - 4px);
  background: rgba(255, 255, 255, 0.07);
  color: #f1f5f9;
  font-family: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.results-load-btn:hover {
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 22%, rgba(255, 255, 255, 0.08));
  box-shadow: 0 6px 24px color-mix(in srgb, var(--accent) 25%, transparent);
  transform: translateY(-1px);
}

.results-load-btn:active {
  transform: translateY(0);
}

.results-load-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.results-load-btn-icon {
  flex-shrink: 0;
  color: var(--accent);
}

.results-load-btn-label {
  line-height: 1.2;
}

.results-viewer-progress {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  padding: 1.25rem;
  background: rgb(30, 30, 30);
  pointer-events: none;
}

.results-viewer-frame.is-loading .results-viewer-progress {
  display: flex;
}

.results-viewer-progress-track {
  width: min(18rem, 88%);
  height: 0.45rem;
  border-radius: 999px;
  background: rgba(226, 232, 240, 0.15);
  overflow: hidden;
}

.results-viewer-progress-bar {
  display: block;
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), color-mix(in srgb, var(--accent) 70%, #fff));
  transition: width 0.15s ease;
}

.results-viewer-progress-label {
  margin: 0;
  max-width: 20rem;
  text-align: center;
  font-size: 0.82rem;
  line-height: 1.4;
  color: rgba(226, 232, 240, 0.9);
}

.results-viewer-camera-hud {
  position: absolute;
  top: 0.45rem;
  right: 0.45rem;
  z-index: 4;
  margin: 0;
  padding: 0.4rem 0.55rem;
  max-width: min(18rem, 72%);
  border-radius: 6px;
  border: 1px solid rgba(148, 163, 184, 0.28);
  background: rgba(11, 18, 36, 0.82);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.62rem;
  line-height: 1.45;
  color: rgba(226, 232, 240, 0.92);
  white-space: pre;
  pointer-events: none;
  user-select: text;
  display: none;
}

.results-viewer-frame.is-loaded .results-viewer-camera-hud {
  display: block;
}

.results-viewer-frame.is-loading .results-viewer-status,
.results-viewer-frame.is-loaded .results-viewer-status {
  display: none;
}

.results-viewer-status {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  margin: 0;
  padding: 0.75rem 1rem 1rem;
  text-align: center;
  font-size: 0.84rem;
  line-height: 1.4;
  color: rgba(226, 232, 240, 0.82);
  background: linear-gradient(transparent, rgba(11, 18, 36, 0.92));
  pointer-events: none;
  z-index: 2;
}

.results-viewer-frame.is-loaded .results-viewer-status {
  display: none;
}

.results-viewer-frame:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}


.results-spark-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
}

.results-viewer-frame canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

/* Qualitative results: narrow input strip + GS viewer (4:3); desktop: thumb column height matches viewer */
.results-showcase {
  display: grid;
  gap: 1rem;
  align-items: start;
}

@media (min-width: 780px) {
  .results-showcase {
    grid-template-columns: minmax(0, 1fr) minmax(0, 3fr);
    gap: 1.25rem;
    align-items: stretch;
    min-height: 0;
  }

  .results-thumbs {
    height: 100%;
    min-height: 0;
    align-self: stretch;
    overflow: hidden;
  }

  .results-thumb-btn {
    flex: 1 1 0;
    min-height: 0;
    display: flex;
  }

  .results-thumb-btn .results-thumb-placeholder {
    flex: 1 1 auto;
    width: 100%;
    height: 100%;
    min-height: 0;
  }

  .results-viewer {
    align-self: stretch;
  }
}

.results-thumbs {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
  min-height: 0;
}

@media (max-width: 779px) {
  .results-thumbs {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    height: auto;
  }

  .results-thumb-btn {
    display: block;
    flex: none;
    min-height: 0;
  }

  .results-thumb-btn .results-thumb-placeholder {
    width: 100%;
    height: auto;
    aspect-ratio: 4 / 3;
    flex: none;
  }
}

.results-thumb-btn {
  width: 100%;
  padding: 0;
  margin: 0;
  border: 2px solid transparent;
  border-radius: calc(var(--radius) - 4px);
  overflow: hidden;
  cursor: pointer;
  background: var(--bg);
  box-shadow: 0 0 0 1px var(--border);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.results-thumb-btn:hover {
  border-color: color-mix(in srgb, var(--accent) 50%, transparent);
}

.results-thumb-btn.is-active {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px var(--accent-soft);
}

.results-thumb-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.results-thumb-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  box-sizing: border-box;
  padding: 0.35rem;
  font-size: clamp(0.58rem, 1.5vw, 0.74rem);
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: center;
  line-height: 1.2;
  background: linear-gradient(145deg, color-mix(in srgb, var(--text) 8%, var(--bg-elevated)), var(--bg)),
    repeating-linear-gradient(
      -45deg,
      color-mix(in srgb, var(--text) 5%, transparent),
      color-mix(in srgb, var(--text) 5%, transparent) 1px,
      transparent 1px,
      transparent 10px
    );
}

.results-viewer {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
}

.results-viewer-chrome {
  display: flex;
  align-items: center;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: calc(var(--radius) - 6px) calc(var(--radius) - 6px) 0 0;
  background: color-mix(in srgb, var(--text) 5%, var(--bg-elevated));
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
}

.results-viewer-title {
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.results-viewer-frame {
  width: 100%;
  aspect-ratio: 4 / 3;
  flex: 0 0 auto;
  min-height: 0;
  border-radius: 0 0 calc(var(--radius) - 6px) calc(var(--radius) - 6px);
  border: 1px solid var(--border);
  background: rgb(30, 30, 30);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.results-viewer-placeholder {
  margin: 0;
  padding: 1.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  color: rgba(226, 232, 240, 0.82);
  font-size: 0.92rem;
  line-height: 1.45;
  max-width: 26rem;
}

.results-viewer-placeholder strong {
  font-size: 1.2rem;
  font-weight: 700;
  color: #f1f5f9;
  letter-spacing: 0.04em;
}

.results-soon-sub {
  display: block;
  font-size: 0.84rem;
  font-weight: 400;
  color: rgba(226, 232, 240, 0.65);
  line-height: 1.45;
}

.results-viewer-embed,
.results-viewer-frame > iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* Qualitative carousel: avoid double frame with inner slides */
.results-carousel .carousel-viewport {
  border: none;
  background: transparent;
}

/* Compare carousel + slider: ours (left clip) vs StraightForward (underlay) */
.compare-carousel .carousel-viewport {
  border: none;
  background: transparent;
}

.compare-carousel-slide .compare-slide-title {
  margin: 0 0 0.35rem;
}

.compare-carousel-slide .compare-slide-caption {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.compare-labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.compare-label--ours {
  color: var(--accent);
}

.compare-viewport {
  --compare-x: 50%;
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  border-radius: calc(var(--radius) - 4px);
  overflow: hidden;
  border: 1px solid var(--border);
  touch-action: none;
  user-select: none;
  cursor: ew-resize;
  background: #0f172a;
}

.compare-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
}

.compare-img--baseline {
  z-index: 1;
}

.compare-img--ours {
  z-index: 2;
  clip-path: polygon(0 0, var(--compare-x) 0, var(--compare-x) 100%, 0 100%);
}

.compare-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--compare-x);
  width: 1.35rem;
  margin-left: -0.675rem;
  z-index: 3;
  cursor: ew-resize;
  touch-action: none;
}

.compare-divider::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 3px;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 0 0 1px rgba(15, 23, 42, 0.35);
}

.compare-grip {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 2.25rem;
  height: 2.25rem;
  margin: -1.125rem 0 0 -1.125rem;
  border-radius: 999px;
  background: #fff;
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.35);
  border: 2px solid rgba(15, 23, 42, 0.12);
}

.compare-hint {
  margin: 0.65rem 0 0;
  font-size: 0.88rem;
  color: var(--text-muted);
  text-align: center;
}

.video-wrap {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #000;
}

.video-wrap video {
  width: 100%;
  border-radius: 0;
}

.video-caption {
  margin-top: 0.75rem;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.grid-2 {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 860px) {
  .grid-2 {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.teaser-figure,
.pipeline-figure {
  margin: 0;
}

.teaser-figure img,
.pipeline-figure img {
  width: 100%;
  height: auto;
  display: block;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.pill-list li {
  font-size: 0.85rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--text);
  border: 1px solid var(--border);
}

.carousel {
  position: relative;
}

.carousel-viewport {
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.carousel-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.carousel-slide {
  min-width: 100%;
  padding: 1.25rem;
}

.carousel-slide h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.carousel-slide p {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.results-carousel-slide .results-slide-title {
  margin: 0 0 0.35rem;
}

.demo-placeholder {
  aspect-ratio: 16 / 9;
  border-radius: calc(var(--radius) - 6px);
  background: linear-gradient(120deg, var(--accent-soft), transparent),
    repeating-linear-gradient(
      -45deg,
      color-mix(in srgb, var(--text) 6%, transparent),
      color-mix(in srgb, var(--text) 6%, transparent) 1px,
      transparent 1px,
      transparent 12px
    );
  display: grid;
  place-items: center;
  color: var(--text-muted);
  font-size: 0.95rem;
  text-align: center;
  padding: 1rem;
}

.carousel-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1rem;
}

.carousel-btn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.carousel-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}

.carousel-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.carousel-dots {
  display: flex;
  gap: 0.35rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  border: none;
  background: var(--border);
  cursor: pointer;
  padding: 0;
}

.carousel-dot[aria-current="true"] {
  background: var(--accent);
  width: 22px;
}

.spec-grid {
  display: grid;
  gap: 1rem;
}

@media (min-width: 720px) {
  .spec-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.spec-card {
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
}

.spec-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
}

.spec-card p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

pre.bibtex {
  margin: 0;
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  background: var(--code-bg);
  color: #e2e8f0;
  font-size: 0.78rem;
  overflow-x: auto;
  border: 1px solid var(--border);
}

.site-footer {
  padding: 2rem 0 2.5rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
}

.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.fade-in.is-visible {
  opacity: 1;
  transform: none;
}