@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --bg: #ffffff;
  --paper: #f5f5f7;
  --dark: #000000;
  --tile-dark: #1d1d1f;
  --text: #1d1d1f;
  --text-muted: #6e6e73;
  --text-dim: #86868b;
  --on-dark: #f5f5f7;
  --muted-on-dark: #a1a1a6;
  --border: rgba(0, 0, 0, 0.1);
  --border-dark: rgba(255, 255, 255, 0.14);
  --primary: #0071e3;
  --primary-hover: #0077ed;
  --link: #0066cc;
  --link-dark: #2997ff;
  --amber: #bf4800;
  --amber-dark: #ff9f45;
  --grad: linear-gradient(90deg, #34c759 0%, #a3d94a 30%, #ffb340 62%, #ff5f45 100%);
  --max-w: 1080px;
  --radius: 18px;
  --radius-lg: 28px;
  --ease: cubic-bezier(0.28, 0.11, 0.32, 1);
  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Inter', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 56px; }
body {
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  letter-spacing: -0.02em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; transition: color 200ms var(--ease), background-color 200ms var(--ease); }
ul { list-style: none; }
img, video { display: block; max-width: 100%; height: auto; }
strong { font-weight: 600; }

/* ── Nav ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 48px;
  display: flex;
  align-items: center;
  background: rgba(22, 22, 23, 0.8);
  color: var(--on-dark);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
}
.nav nav { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 22px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.nav-logo { min-height: 44px; display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700; font-size: 1rem; letter-spacing: -0.01em; }
.nav-logo::before { content: ''; width: 16px; height: 16px; border-radius: 5px; background: var(--grad); }
.nav ul { display: flex; gap: 0.25rem; }
.nav ul a { min-height: 44px; padding: 0 0.8rem; display: inline-flex; align-items: center; color: rgba(245, 245, 247, 0.8); font-size: 0.8rem; }
.nav ul a:hover { color: #fff; }

/* ── Hero ── */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(5rem, 11vw, 8.5rem) 22px clamp(4rem, 8vw, 6rem);
  background: var(--dark);
  color: var(--on-dark);
  text-align: center;
}
.hero-glow {
  position: absolute;
  left: 50%;
  top: 40%;
  z-index: -1;
  width: min(1100px, 150vw);
  aspect-ratio: 2 / 1;
  background:
    radial-gradient(closest-side at 30% 50%, rgba(52, 199, 89, 0.3), transparent),
    radial-gradient(closest-side at 60% 45%, rgba(255, 179, 64, 0.26), transparent),
    radial-gradient(closest-side at 78% 55%, rgba(255, 95, 69, 0.22), transparent);
  filter: blur(40px);
  transform: translate(-50%, -50%);
  animation: glowDrift 14s ease-in-out infinite alternate;
  pointer-events: none;
}
.hero-content { max-width: 900px; margin: 0 auto; }
.venue-pill { display: inline-flex; align-items: center; gap: 0.5rem; margin-bottom: 1.5rem; padding: 0.4rem 1rem; border-radius: 980px; background: rgba(255, 179, 64, 0.16); color: #ffc463; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); font-size: 0.9rem; font-weight: 600; }
.venue-pill::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: currentColor; animation: pulse 2s infinite; }
.hero-title { font-size: clamp(3.6rem, 12vw, 8.5rem); font-weight: 700; letter-spacing: -0.06em; line-height: 0.95; }
.grad { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-subtitle { max-width: 760px; margin: 1.25rem auto 2rem; font-size: clamp(1.3rem, 3vw, 2.1rem); font-weight: 500; line-height: 1.2; letter-spacing: -0.025em; }
.hero-subtitle strong { font-weight: 700; color: #fff; }
.authors { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.35rem 1.35rem; font-size: clamp(1rem, 1.6vw, 1.15rem); font-weight: 500; }
.authors a:hover { text-decoration: underline; text-underline-offset: 0.2em; }
.authors sup, .affiliations sup { color: var(--muted-on-dark); font-size: 0.65em; margin-left: 0.1em; }
.affiliations { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.25rem 1.5rem; margin-top: 0.6rem; color: var(--muted-on-dark); font-size: 0.95rem; }
.links { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.75rem; margin-top: 2.25rem; }
.btn { min-height: 44px; padding: 0.65rem 1.35rem; display: inline-flex; align-items: center; gap: 0.5rem; border-radius: 980px; background: var(--primary); color: #fff; font-size: 1rem; }
.btn:hover { background: var(--primary-hover); }
.btn-ghost { background: rgba(255, 255, 255, 0.1); color: var(--on-dark); }
.btn-ghost:hover { background: rgba(255, 255, 255, 0.18); }

/* ── Hero background video ── */
.hero-video { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; opacity: 0.45; }
.hero-video + .hero-glow { opacity: 0.8; }
.hero::after { content: ''; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0.55) 60%, #000 100%); pointer-events: none; }
.hero .eq { margin-top: 0.7rem; color: var(--muted-on-dark); font-size: 0.85rem; }

/* ── Highlights ── */
.highlights {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
  padding: 0 22px clamp(4rem, 8vw, 6rem);
  background: var(--dark);
  color: var(--on-dark);
}
.highlights > * { max-width: 100%; }
.highlights { justify-content: center; }
.highlight { padding: 1.75rem 1.4rem; border-radius: var(--radius-lg); background: var(--tile-dark); text-align: left; }
.highlight-num { display: block; margin-bottom: 0.5rem; white-space: nowrap; font-size: clamp(1.7rem, 3.4vw, 2.7rem); font-weight: 700; letter-spacing: -0.045em; line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.highlight-label { display: block; font-size: 1.05rem; font-weight: 600; line-height: 1.3; }
.highlight-ref { display: block; margin-top: 0.4rem; color: var(--muted-on-dark); font-size: 0.85rem; }
@media (min-width: 1124px) { .highlights { grid-template-columns: repeat(4, 248px); } }

/* ── Sections ── */
.section { padding: clamp(4.5rem, 10vw, 7.5rem) 22px; }
.section.paper { background: var(--paper); }
.section.dark { background: var(--dark); color: var(--on-dark); }
.inner { max-width: var(--max-w); margin: 0 auto; }
.inner.narrow { max-width: 780px; }
.eyebrow { margin-bottom: 0.75rem; color: var(--text-muted); font-size: clamp(1rem, 1.5vw, 1.2rem); font-weight: 600; }
.eyebrow.new { color: var(--amber); }
.dark .eyebrow { color: var(--muted-on-dark); }
.dark .eyebrow.new { color: var(--amber-dark); }
.section-title { max-width: 860px; margin-bottom: 1.25rem; font-size: clamp(2.2rem, 5.4vw, 3.75rem); font-weight: 700; letter-spacing: -0.035em; line-height: 1.07; }
.lede { max-width: 780px; margin-bottom: 2.75rem; color: var(--text-muted); font-size: clamp(1.08rem, 1.8vw, 1.35rem); line-height: 1.42; letter-spacing: -0.012em; }
.lede.small { font-size: clamp(1rem, 1.5vw, 1.15rem); margin-bottom: 2rem; }
.lede em { color: var(--text); font-style: normal; font-weight: 600; }
.dark .lede { color: var(--muted-on-dark); }
.sub-title { margin: clamp(3.5rem, 7vw, 5rem) 0 0.75rem; font-size: clamp(1.6rem, 3vw, 2.25rem); font-weight: 700; letter-spacing: -0.03em; }
.abstract { color: var(--text); font-size: clamp(1.08rem, 1.7vw, 1.3rem); line-height: 1.55; letter-spacing: -0.015em; }

/* ── Figures ── */
.card-figure { padding: clamp(0.6rem, 1.6vw, 1.25rem); border-radius: var(--radius-lg); background: #fff; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.08); }
.section:not(.paper):not(.dark) .card-figure { background: var(--paper); box-shadow: none; }
.dark .card-figure, .dark .tile-figure.light { background: #fff; box-shadow: 0 30px 120px rgba(41, 151, 255, 0.16); }
.card-figure img { width: 100%; border-radius: calc(var(--radius-lg) - 12px); }
.card-figure.compact { max-width: 760px; margin-inline: auto; }
.caption { max-width: 860px; margin: 1.25rem auto 0; color: var(--text-muted); font-size: 0.95rem; line-height: 1.55; text-align: center; }
.caption strong { color: var(--text); }
.dark .caption { color: var(--muted-on-dark); }
.dark .caption strong { color: var(--on-dark); }
.dark .card-figure + .caption { margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1.1rem; margin: clamp(2rem, 5vw, 3rem) 0; }
.tile-figure { display: flex; flex-direction: column; overflow: hidden; border-radius: var(--radius-lg); background: var(--paper); }
.dark .tile-figure { background: var(--tile-dark); }
.tile-figure img { width: 100%; aspect-ratio: 16 / 9.5; object-fit: cover; }
.tile-figure.light img { object-fit: contain; padding: 0.75rem; background: #fff; }
.grid-2.stack { grid-template-columns: 1fr; margin-top: 0; }
.stack .tile-figure img { aspect-ratio: auto; padding: clamp(0.75rem, 2vw, 1.25rem); }
.tile-figure figcaption { padding: 1.25rem 1.5rem 1.5rem; color: var(--text-muted); font-size: 0.95rem; line-height: 1.5; }
.tile-figure figcaption strong { display: block; margin-bottom: 0.2rem; color: var(--text); font-size: 1.05rem; }
.dark .tile-figure figcaption { color: var(--muted-on-dark); }
.dark .tile-figure figcaption strong { color: var(--on-dark); }
.dark .tile-figure.light figcaption { background: var(--tile-dark); }
.video-frame { overflow: hidden; border-radius: var(--radius-lg); background: #111; box-shadow: 0 30px 120px rgba(142, 108, 255, 0.22); }
.video-frame video { width: 100%; }

/* ── Method ── */
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.1rem; margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.step { padding: clamp(1.6rem, 3vw, 2.25rem); border-radius: var(--radius-lg); background: var(--paper); }
.step-num { width: 36px; height: 36px; margin-bottom: 1.1rem; display: grid; place-items: center; border-radius: 50%; background: var(--grad); color: #fff; font-weight: 700; }
.step h3 { margin-bottom: 0.5rem; font-size: 1.35rem; font-weight: 700; letter-spacing: -0.025em; line-height: 1.2; }
.step p { color: var(--text-muted); font-size: 0.98rem; }
.objective { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr); gap: clamp(1.5rem, 4vw, 3rem); align-items: center; margin-top: clamp(2.5rem, 5vw, 3.5rem); padding: clamp(1.75rem, 4vw, 2.75rem); border-radius: var(--radius-lg); background: var(--tile-dark); color: var(--on-dark); }
.objective h3 { margin-bottom: 0.5rem; font-size: 1.5rem; font-weight: 700; letter-spacing: -0.025em; }
.objective p { color: var(--muted-on-dark); }
.formula { padding: 1.25rem 1.4rem; overflow-x: auto; border-radius: var(--radius); background: rgba(255, 255, 255, 0.06); font-family: 'Times New Roman', Times, serif; font-size: clamp(1.05rem, 2vw, 1.35rem); letter-spacing: 0; white-space: nowrap; text-align: center; }

/* ── Tables ── */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); background: var(--paper); padding: 0.5rem 1rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.95rem; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
th, td { padding: 0.8rem 0.65rem; text-align: center; white-space: nowrap; }
th { color: var(--text-muted); font-size: 0.8rem; font-weight: 600; }
th span { color: var(--text-dim); font-weight: 500; }
thead tr:first-child th { padding-bottom: 0.2rem; }
thead tr:last-child th { border-bottom: 1px solid var(--border); }
td:first-child, th:first-child { text-align: left; font-weight: 600; color: var(--text); }
tbody tr + tr td { border-top: 1px solid var(--border); }
.muted-row td { color: var(--text-dim); }
.ours td { background: rgba(0, 113, 227, 0.07); color: var(--primary); font-weight: 700; }
.ours td:first-child { border-radius: 12px 0 0 12px; }
.ours td:last-child { border-radius: 0 12px 12px 0; }
.tag { margin-left: 0.4rem; padding: 0.15rem 0.5rem; border-radius: 980px; background: rgba(0, 0, 0, 0.06); color: var(--text-muted); font-size: 0.7rem; font-weight: 600; vertical-align: middle; }
.ours .tag { background: var(--primary); color: #fff; }

/* ── Analysis cards ── */
.cards { margin-top: 0; }
.card { padding: clamp(1.6rem, 3vw, 2.25rem); border-radius: var(--radius-lg); background: var(--paper); }
.card h3 { margin-bottom: 0.5rem; font-size: 1.4rem; font-weight: 700; letter-spacing: -0.025em; }
.card > p { color: var(--text-muted); font-size: 0.98rem; }
.mini { margin: 1.25rem 0 0.75rem; padding: 0.25rem; border-radius: var(--radius); background: #fff; }
.mini th, .mini td { padding: 0.6rem 0.5rem; }
.mini th { border-bottom: 1px solid var(--border); }
.card .note { color: var(--text-dim); font-size: 0.85rem; }

/* ── Real-world stats ── */
.stat-row { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1rem; margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.stat-row > div { padding: 1.5rem 1.25rem; border-radius: var(--radius-lg); background: var(--tile-dark); text-align: center; }
.stat-row .big { display: block; margin-bottom: 0.35rem; font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; letter-spacing: -0.045em; line-height: 1; }
.stat-row span:not(.big) { color: var(--muted-on-dark); font-size: 0.95rem; }

/* ── Per-plant results ── */
.plant-row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 0.9rem; margin-bottom: clamp(2.5rem, 5vw, 3.5rem); }
.plant { padding: 1.4rem 1.1rem 1.25rem; border-radius: var(--radius-lg); background: var(--tile-dark); }
.plant-name { color: var(--muted-on-dark); font-size: 0.85rem; font-weight: 600; }
.plant-sr { display: block; margin: 0.35rem 0 0.75rem; font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: 700; letter-spacing: -0.04em; line-height: 1; }
.plant-bar { height: 6px; overflow: hidden; border-radius: 3px; background: rgba(255, 255, 255, 0.1); }
.plant-bar span { display: block; height: 100%; border-radius: 3px; background: var(--grad); }
.plant-desc { margin-top: 0.7rem; color: var(--muted-on-dark); font-size: 0.82rem; line-height: 1.4; }
.plant.hard .plant-sr { color: var(--muted-on-dark); }

/* ── BibTeX ── */
.bibtex { position: relative; border-radius: var(--radius-lg); background: var(--tile-dark); color: #e8e8ed; }
.bibtex pre { overflow-x: auto; padding: 1.75rem 1.75rem 1.5rem; font-family: var(--mono); font-size: 0.85rem; line-height: 1.65; letter-spacing: 0; }
.copy-btn { position: absolute; top: 0.9rem; right: 0.9rem; min-height: 36px; padding: 0.4rem 1rem; border: 0; border-radius: 980px; background: rgba(255, 255, 255, 0.12); color: #fff; font: inherit; font-size: 0.85rem; cursor: pointer; transition: background-color 200ms var(--ease); }
.copy-btn:hover { background: rgba(255, 255, 255, 0.22); }
.ack { margin-top: 2rem; color: var(--text-muted); font-size: 0.9rem; }

/* ── Footer ── */
footer { padding: 1.5rem 22px 2rem; background: var(--paper); color: var(--text-dim); font-size: 0.8rem; text-align: center; }
footer p { max-width: var(--max-w); margin: 0 auto; padding-top: 1rem; border-top: 1px solid var(--border); }
footer a { color: var(--text-muted); }
footer a:hover { color: var(--text); text-decoration: underline; }

:focus-visible { outline: 3px solid rgba(0, 125, 250, 0.6); outline-offset: 3px; border-radius: 6px; }

/* ── Motion (hidden states only apply once JS opts in) ── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.5; transform: scale(1.25); } }
@keyframes glowDrift { from { transform: translate(-54%, -50%) scale(1); } to { transform: translate(-46%, -52%) scale(1.12); } }
.fade-up { animation: fadeUp 1s var(--ease) both; }
.delay-1 { animation-delay: 0.12s; }
.delay-2 { animation-delay: 0.24s; }
.delay-3 { animation-delay: 0.36s; }
.js-motion .reveal-zoom, .js-motion .reveal { transition: opacity 1s var(--ease), transform 1s var(--ease); }
.js-motion .reveal-zoom:not(.in) { opacity: 0.3; transform: scale(0.93); }
.js-motion .reveal:not(.in) { opacity: 0; transform: translateY(36px); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

@media (max-width: 900px) {
  .highlights, .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .plant-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .steps { grid-template-columns: 1fr; }
  .objective { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .grid-2 { grid-template-columns: 1fr; }
  .nav ul a { padding: 0 0.5rem; font-size: 0.75rem; }
}

@media (max-width: 560px) {
  .plant-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 420px) {
  .nav nav { padding: 0 0.75rem; }
  .nav-logo::before { display: none; }
  .nav ul a { padding: 0 0.4rem; font-size: 0.72rem; }
  .highlight { padding: 1.4rem 1.1rem; }
}