*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --navy:      #0a1628;
  --navy-mid:  #0f2044;
  --navy-light:#162a55;
  --blue:      #2563eb;
  --blue-soft: #3b82f6;
  --gold:      #c9a84c;
  --gold-soft: #e2c47a;
  --cream:     #f5f1ea;
  --cream-mid: #ede8de;
  --cream-dark:#e0d9cc;
  --text:      #1a2340;
  --text-muted:#4a5568;
  --mono:      'JetBrains Mono', monospace;
  --serif:     'EB Garamond', Georgia, serif;
  --sans:      'DM Sans', system-ui, sans-serif;
}
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--sans);
  color: var(--text);
  background: var(--cream);
  line-height: 1.82;
}
.serif     { font-family: var(--serif); }
.mono      { font-family: var(--mono); }
.gold      { color: var(--gold); }
.muted     { color: var(--text-muted); }
.italic    { font-style: italic; }
#nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.15);
  display: flex; align-items: center;
  padding: 0 40px; height: 54px; gap: 28px;
}
#nav .logo {
  font-family: var(--serif);
  font-size: 1.25rem;
  color: var(--gold);
  text-decoration: none;
  letter-spacing: 0.02em;
  white-space: nowrap;
  margin-right: auto;
}
#nav a:not(.logo) {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
  white-space: nowrap;
}
#nav a:not(.logo):hover { color: var(--gold-soft); }
#nav .nav-btn {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--navy);
  background: var(--gold);
  padding: 6px 14px;
  border-radius: 3px;
  text-decoration: none;
  transition: background 0.2s;
  white-space: nowrap;
}
#nav .nav-btn:hover { background: var(--gold-soft); }
@media (max-width: 760px) {
  #nav a:not(.logo):not(.nav-btn) { display: none; }
  #nav { padding: 0 20px; }
}
#hero {
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(37, 99, 235, 0.18) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(201, 168, 76, 0.10) 0%, transparent 55%),
    linear-gradient(160deg, var(--navy) 0%, #0d1e3e 50%, #0a1628 100%);
  padding: 100px 40px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
#hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M20 19v2M19 20h2' stroke='white' stroke-width='1' opacity='0.025'/%3E%3C/svg%3E");
  pointer-events: none;
}
.hero-kicker {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 18px;
  opacity: 0.9;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 400;
  color: #fff;
  line-height: 1.18;
  max-width: 860px;
  margin: 0 auto 16px;
}
.hero-title em { color: var(--gold); font-style: italic; }
.hero-subtitle {
  font-family: var(--sans);
  font-size: 1.05rem;
  color: rgba(255,255,255,0.62);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.7;
}
.hero-authors {
  font-family: var(--sans);
  font-size: 0.9rem;
  color: rgba(255,255,255,0.78);
  margin-bottom: 8px;
}
.hero-authors sup { color: var(--gold); font-size: 0.65rem; }
.hero-affiliations {
  font-family: var(--sans);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 28px;
  display: flex; justify-content: center; gap: 24px; flex-wrap: wrap;
}
.hero-divider {
  width: 48px; height: 2px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  margin: 0 auto 24px;
}
.hero-tags {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 8px;
  margin-bottom: 36px;
  list-style: none;
  padding-left: 0;
}
.hero-tag {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  border: 1px solid rgba(201,168,76,0.3);
  padding: 4px 12px;
  border-radius: 2px;
  display: inline-block;
}
.hero-btns {
  display: flex; justify-content: center; gap: 14px; flex-wrap: wrap;
}
.btn-primary {
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  background: var(--gold); color: var(--navy);
  padding: 11px 26px; border-radius: 3px;
  text-decoration: none; font-weight: 500;
  transition: background 0.2s, transform 0.15s;
}
.btn-primary:hover { background: var(--gold-soft); transform: translateY(-1px); }
.btn-outline {
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  background: transparent;
  color: rgba(255,255,255,0.75);
  border: 1px solid rgba(255,255,255,0.25);
  padding: 11px 26px; border-radius: 3px;
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s, transform 0.15s;
}
.btn-outline:hover {
  border-color: var(--gold-soft);
  color: var(--gold-soft);
  transform: translateY(-1px);
}
.content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
}
@media (max-width: 760px) {
  .content { padding: 0 22px; }
}
.section-head {
  display: flex; align-items: baseline; gap: 16px;
  margin-bottom: 10px;
}
.section-num {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--gold);
  letter-spacing: 0.1em;
  flex-shrink: 0;
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 400;
  color: var(--navy);
  line-height: 1.2;
}
.section-lead {
  font-size: 0.97rem;
  color: var(--text-muted);
  max-width: 760px;
  margin-bottom: 36px;
  line-height: 1.82;
}
.subsection-title {
  font-family: var(--serif);
  font-size: 1.2rem;
  color: var(--navy);
  border-left: 3px solid var(--gold);
  padding-left: 12px;
  margin-bottom: 12px;
  margin-top: 28px;
}
#abstract {
  background: var(--navy-mid);
  padding: 64px 40px;
}
.abstract-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 40px;
  align-items: start;
}
.abstract-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  padding-top: 4px;
}
.abstract-text {
  font-family: var(--serif);
  font-size: 1.08rem;
  color: rgba(255,255,255,0.82);
  line-height: 1.9;
}
.abstract-text p + p { margin-top: 1em; }
@media (max-width: 640px) {
  .abstract-inner { grid-template-columns: 1fr; gap: 16px; }
  #abstract { padding: 48px 22px; }
}
.section {
  padding: 72px 0;
  border-bottom: 1px solid var(--cream-dark);
}
.section:last-child { border-bottom: none; }
.pkg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 32px;
}
.pkg-card {
  background: #fff;
  border: 1px solid var(--cream-dark);
  border-radius: 6px;
  padding: 24px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.pkg-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(10,22,40,0.10);
}
.pkg-badge {
  position: absolute; top: 16px; right: 16px;
  font-family: var(--mono); font-size: 0.65rem;
  background: rgba(37,99,235,0.1);
  color: var(--blue);
  padding: 2px 8px; border-radius: 10px;
}
.pkg-icon {
  width: 40px; height: 40px; border-radius: 8px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-soft) 100%);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
  font-size: 1.2rem;
}
.pkg-name {
  font-family: var(--mono); font-size: 0.9rem;
  color: var(--navy); font-weight: 500;
  margin-bottom: 6px;
}
.pkg-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.65;
}
.fig-card {
  background: #fff;
  border: 1px solid var(--cream-dark);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 28px;
}
.fig-img-wrap {
  background: var(--cream);
  padding: 20px;
  text-align: center;
}
.fig-img-wrap img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 3px;
}
.img-full { max-width: 100%; }
.img-md   { max-width: 720px; }
.img-sm   { max-width: 480px; }
.fig-caption {
  padding: 14px 20px;
  border-top: 1px solid var(--cream-dark);
  display: flex; gap: 10px; align-items: baseline;
}
.fig-label {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--gold);
  letter-spacing: 0.08em;
  flex-shrink: 0;
}
.fig-desc {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.fig-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 28px;
}
.fig-grid-3 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  margin-top: 28px;
}
@media (max-width: 900px) {
  .fig-grid-3 { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .fig-grid-2, .fig-grid-3 { grid-template-columns: 1fr; }
}
.code-wrap {
  margin-top: 20px;
  background: var(--navy);
  border-radius: 6px;
  overflow: hidden;
  border: 1px solid rgba(201,168,76,0.2);
}
.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 18px;
  background: rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.code-lang {
  font-family: var(--mono); font-size: 0.68rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--gold); opacity: 0.8;
}
.code-dots { display: flex; gap: 6px; }
.code-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,0.12);
}
pre {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: #c9d8f0;
  padding: 20px 20px;
  overflow-x: auto;
}
pre .cm  { color: #6a9ec7; }  /* comment */
pre .kw  { color: #7ecce6; }  /* keyword */
pre .st  { color: #9ee4a4; }  /* string */
pre .nb  { color: #f0b97a; }  /* number / builtin */
pre .fn  { color: #9dcbf8; }  /* function */
.info-box {
  background: rgba(37, 99, 235, 0.06);
  border-left: 3px solid var(--blue-soft);
  border-radius: 0 4px 4px 0;
  padding: 14px 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-top: 20px;
}
.pipeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0;
  margin-top: 32px;
  border: 1px solid var(--cream-dark);
  border-radius: 6px;
  overflow: hidden;
}
.pipe-step {
  padding: 24px 20px;
  background: #fff;
  border-right: 1px solid var(--cream-dark);
  position: relative;
}
.pipe-step:last-child { border-right: none; }
.pipe-num {
  font-family: var(--mono); font-size: 0.68rem;
  letter-spacing: 0.1em; color: var(--gold);
  margin-bottom: 8px;
}
.pipe-title {
  font-family: var(--serif); font-size: 1rem;
  color: var(--navy); margin-bottom: 6px;
}
.pipe-desc {
  font-size: 0.83rem; color: var(--text-muted);
  line-height: 1.6;
}
.tpms-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-top: 28px;
}
.tpms-card {
  background: #fff;
  border: 1px solid var(--cream-dark);
  border-radius: 6px;
  padding: 20px 18px;
  transition: transform 0.2s, box-shadow 0.2s;
}
.tpms-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(10,22,40,0.08);
}
.tpms-name {
  font-family: var(--mono); font-size: 0.82rem;
  color: var(--blue-soft); margin-bottom: 6px;
}
.tpms-label {
  font-family: var(--serif); font-size: 0.95rem;
  color: var(--navy); margin-bottom: 6px;
}
.tpms-eq {
  font-family: var(--mono); font-size: 0.7rem;
  color: var(--text-muted); font-style: italic;
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--cream-dark);
  border: 1px solid var(--cream-dark);
  border-radius: 6px;
  overflow: hidden;
  margin-top: 28px;
}
.metric-cell {
  background: #fff;
  padding: 20px 16px;
  text-align: center;
}
.metric-badge {
  width: 32px; height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-soft));
  color: var(--navy);
  font-family: var(--mono); font-size: 0.65rem; font-weight: 500;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 10px;
}
.metric-name {
  font-family: var(--serif); font-size: 0.9rem;
  color: var(--navy); font-weight: 600;
  margin-bottom: 4px;
}
.metric-desc {
  font-size: 0.78rem; color: var(--text-muted);
}
#results {
  background: #edf2fb;
  padding: 72px 40px;
}
#install {
  background: var(--cream-mid);
  padding: 72px 40px;
}
.install-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 32px;
}
@media (max-width: 700px) {
  .install-grid { grid-template-columns: 1fr; }
}
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.4);
  text-align: center;
  padding: 32px 40px;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}
footer a { color: var(--gold); text-decoration: none; }
.fade-up {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}