:root {
  --bg: #f4f7fd;
  --text: #152032;
  --muted: #5c6b86;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #e8efff;
  --panel: #ffffff;
  --border: #d8e2f4;
  --shadow: 0 12px 40px rgba(22, 45, 90, 0.08);
  --radius: 14px;
  --maxw: 1160px;
  /* vertical rhythm */
  --pad-x: clamp(18px, 4vw, 28px);
  --space-block: 28px;
  --space-block-lg: 36px;
  --space-inner: 20px;
}

* {
  box-sizing: border-box;
}

body.site-body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, Arial, sans-serif;
  background: radial-gradient(ellipse 120% 80% at 10% -10%, #e8efff 0%, var(--bg) 45%, var(--bg) 100%);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

#app {
  min-height: 100vh;
}

.site-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px var(--pad-x);
  background: rgba(244, 247, 253, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-left {
  flex-shrink: 0;
}

.brand {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

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

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: center;
  flex: 1;
}

.site-nav a {
  padding: 8px 12px;
  border-radius: 9px;
  font-size: 14px;
  color: #334867;
  white-space: nowrap;
}

.site-nav a:hover {
  background: var(--primary-soft);
  text-decoration: none;
  color: var(--primary-dark);
}

.site-nav a.active {
  background: var(--primary);
  color: #fff;
}

.site-nav a.active:hover {
  background: var(--primary-dark);
  color: #fff;
}

.header-right {
  flex-shrink: 0;
}

.lang-switch {
  font-size: 14px;
  font-weight: 600;
  padding: 8px 14px;
  border-radius: 9px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--primary-dark);
}

.lang-switch:hover {
  background: var(--primary-soft);
  text-decoration: none;
}

.site-main {
  flex: 1;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space-block-lg) var(--pad-x) calc(var(--space-block-lg) + 16px);
  width: 100%;
}

/* uniform gap between hero / CTA / cards / grids */
.site-main > *:not(:last-child) {
  margin-bottom: var(--space-block);
}

.hero {
  background: linear-gradient(135deg, #ffffff 0%, #f0f5ff 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(24px, 4vw, 36px);
  margin-bottom: 0;
  box-shadow: var(--shadow);
}

.hero h1 {
  margin: 0 0 14px;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.hero-sub {
  margin: 0;
  font-size: 17px;
  color: var(--muted);
  max-width: 52rem;
  line-height: 1.6;
}

.tag-row {
  margin-top: 20px;
}

.tag {
  display: inline-block;
  background: var(--primary-soft);
  border: 1px solid #c7d9ff;
  color: #1e4bb8;
  padding: 4px 11px;
  border-radius: 999px;
  margin: 4px 8px 0 0;
  font-size: 12px;
  font-weight: 600;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 0;
}

.btn {
  display: inline-block;
  padding: 11px 18px;
  border-radius: 10px;
  border: 1px solid #b8ceff;
  background: var(--panel);
  color: #1e40af;
  font-weight: 600;
  font-size: 15px;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn:hover {
  text-decoration: none;
  filter: brightness(1.03);
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
}

.grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 26px);
  box-shadow: var(--shadow);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(22, 45, 90, 0.1);
}

.card h2 {
  margin: 0 0 12px;
  font-size: 18px;
  line-height: 1.35;
}

.card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.62;
}

.card h2 + table,
.card h2 + pre {
  margin-top: 4px;
}

.card p + pre,
.card pre + p {
  margin-top: var(--space-inner);
}

.card-link {
  display: inline-block;
  margin-top: 18px;
  font-weight: 600;
  font-size: 14px;
}

.card-platform .platform-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--primary-dark);
  background: var(--primary-soft);
  padding: 4px 8px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.solution-card .solution-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: #0f766e;
  background: #ccfbf1;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 10px;
}

.machine-block h2 {
  margin-bottom: 14px;
}

.machine-block pre {
  margin: 0;
}

code,
pre {
  font-family: ui-monospace, "Cascadia Mono", Consolas, monospace;
  font-size: 13px;
}

code {
  background: #f1f5ff;
  border: 1px solid #d8e4ff;
  padding: 2px 7px;
  border-radius: 6px;
}

pre {
  background: #f8faff;
  border: 1px solid #d8e4ff;
  border-radius: 10px;
  padding: 18px 20px;
  overflow: auto;
  color: #1a315f;
  line-height: 1.5;
}

.step-line {
  margin: 0;
  padding: 10px 0 0;
  line-height: 1.55;
}

.step-line:first-of-type {
  padding-top: 4px;
}

.muted {
  color: var(--muted);
  font-size: 14px;
}

.data-note {
  margin-top: var(--space-block);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  border: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f0f5ff;
  color: #243e6d;
  font-weight: 600;
}

tbody tr:nth-child(even) {
  background: #fafcff;
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.85);
}

.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: var(--space-block) var(--pad-x) calc(var(--space-block) + 8px);
}

.footer-tagline {
  margin: 0 0 16px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.footer-links a {
  font-size: 14px;
  font-weight: 500;
}

.footer-cta {
  font-weight: 700;
}

a.table-download {
  font-weight: 600;
  white-space: nowrap;
}

a.table-download:hover {
  text-decoration: underline;
}

.download-tip {
  background: linear-gradient(135deg, #f8fbff 0%, #eef4ff 100%);
  border-color: #b8ceff;
}

.download-tip-title {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
  color: #1e3a5f;
}

.download-tip-body {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
}

.downloads-table-wrap {
  overflow-x: auto;
}

table.downloads-table {
  min-width: 720px;
}

.td-download {
  vertical-align: middle;
  min-width: 220px;
}

a.download-row-btn {
  display: inline-block;
  text-align: center;
  text-decoration: none;
  padding: 10px 16px;
  font-size: 14px;
  line-height: 1.35;
  max-width: 100%;
  word-break: break-all;
}

a.download-row-btn:hover {
  text-decoration: none;
  filter: brightness(1.05);
}

.app-loading {
  max-width: var(--maxw);
  margin: 80px auto;
  padding: 40px;
  text-align: center;
  font-size: 16px;
  color: var(--muted);
}

.app-error h2 {
  margin-top: 0;
}

@media (max-width: 900px) {
  .site-header {
    position: static;
  }

  .site-nav {
    order: 3;
    width: 100%;
    justify-content: flex-start;
  }

  :root {
    --space-block: 22px;
    --space-block-lg: 28px;
  }
}