:root {
  --fs-display: 56px; --fs-h1: 40px; --fs-h2: 30px; --fs-h3: 22px; --fs-h4: 18px;
  --fs-lg: 17px; --fs-body: 15px; --fs-sm: 13.5px; --fs-xs: 12px; --fs-micro: 10.5px;
  --fw-light: 300; --fw-regular: 400; --fw-medium: 500; --fw-semibold: 600; --fw-bold: 700;
  --lh-tight: 1.08; --lh-snug: 1.2; --lh-normal: 1.5; --lh-relaxed: 1.7;
  --ls-tight: -0.02em; --ls-snug: -0.01em; --ls-normal: 0; --ls-wide: 0.08em; --ls-wider: 0.15em; --ls-widest: 0.22em;
  --text-eyebrow-size: var(--fs-micro); --text-eyebrow-ls: var(--ls-widest);
}

*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-normal);
  color: var(--text-body);
  background-color: var(--bg-base);
  background-image: var(--wash-opal), var(--wash-amber);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { font-family: var(--font-display); color: var(--text-display); letter-spacing: var(--ls-snug); line-height: var(--lh-snug); margin: 0; }
a { color: var(--accent-ink); text-decoration: none; }
:focus-visible { outline: none; box-shadow: 0 0 0 3px var(--ring); border-radius: var(--radius-xs); }
::selection { background: rgba(156, 196, 244, 0.28); color: var(--text-display); }
.syn-opal-text { background: var(--grad-depth); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent; }
[data-theme="light"] body { background-image: none; }
[data-theme="light"] .syn-opal-text { background-image: var(--grad-depth-on-light); }
.syn-preview { padding: var(--space-6); }
.syn-row { display: flex; gap: var(--space-4); align-items: center; flex-wrap: wrap; }
.syn-stack { display: flex; flex-direction: column; gap: var(--space-4); }
.syn-grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 920px) { .syn-grid3 { grid-template-columns: 1fr; } }

.syn-home-link { display: inline-flex; align-items: center; gap: var(--space-3); text-decoration: none; }
.syn-mark { width: 38px; height: 38px; object-fit: contain; flex-shrink: 0; }
.syn-wordmark {
  display: inline-flex; align-items: baseline; gap: 0;
  font-family: var(--font-wordmark); font-size: 21px; font-weight: 800; letter-spacing: 0.04em; line-height: 1; text-transform: lowercase;
}
.syn-wordmark-desk { font-size: 16px; }
.syn-band .syn-wordmark { transform: translateY(-3px); }
.syn-home-link-desk .syn-mark { width: 32px; height: 32px; }
.syn-wm-name { font-weight: 800; color: var(--wordmark-name); }
.syn-wm-hyphen { margin: 0; padding: 0; color: var(--wordmark-hyphen); }
.syn-wm-q { font-weight: 700; color: var(--wordmark-ai); }
.syn-desk-tag { font-family: var(--font-mono); font-size: 12.5px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--desk-tag); margin-left: var(--space-2); }

.syn-band {
  position: sticky; top: 0; z-index: 50;
  background: linear-gradient(180deg, var(--band-glass), color-mix(in srgb, var(--band-glass) 72%, transparent));
  -webkit-backdrop-filter: blur(24px) saturate(1.4); backdrop-filter: blur(24px) saturate(1.4);
  border-bottom: 1px solid var(--band-hairline);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06), 0 14px 34px -16px rgba(0, 0, 0, 0.6);
}
[data-theme="light"] .syn-band { box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.8), 0 14px 34px -16px rgba(16, 23, 38, 0.25); }
.syn-band-static { position: relative; }
.syn-band-inner {
  max-width: var(--container-xl); margin: 0 auto; padding: var(--space-4) var(--gutter);
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: var(--space-4) var(--space-6);
}
.syn-band nav { display: flex; gap: var(--space-3); align-items: center; flex-wrap: wrap; margin-left: auto; }
.syn-band nav a {
  font-family: var(--font-mono); font-size: 14px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--text-secondary); text-shadow: 0 1px 6px rgba(4, 7, 14, 0.9); transition: color var(--dur-base) var(--ease-out); padding: var(--space-1) 6px;
}
.syn-band nav a:hover { color: var(--nav-hover); text-shadow: 0 0 12px color-mix(in srgb, var(--nav-hover) 50%, transparent); }
[data-theme="light"] .syn-band nav a, [data-theme="light"] .syn-band nav a:hover { text-shadow: none; }
.syn-band nav a.home { color: var(--gold-bright); font-weight: 700; }
.syn-band .syn-sep { color: rgba(246, 241, 233, 0.3); font-family: var(--font-mono); font-size: 13px; user-select: none; }
[data-theme="light"] .syn-band .syn-sep { color: var(--border-strong); }
.syn-band .syn-gradient-rule { position: absolute; left: 0; right: 0; bottom: -2px; }
@media (max-width: 680px) {
  .syn-band { position: relative; background: var(--navy-950); }
  .syn-band-inner { padding: var(--space-3) var(--gutter); gap: 10px 14px; }
  .syn-band .syn-wordmark { font-size: 18px; transform: translateY(-2px); }
  .syn-band .syn-desk-tag { font-size: 11px; }
  .syn-band .syn-mark { width: 32px; height: 32px; }
  .syn-band nav { gap: 6px var(--space-3); }
  .syn-band nav a { font-size: 11px; }
}

.syn-gradient-rule { height: var(--bw-thick); background: var(--grad-rule); opacity: 0.85; }

.syn-btn {
  white-space: nowrap; display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-sans); font-size: var(--fs-lg); padding: 15px 32px; border-radius: var(--radius-control);
  border: 1px solid transparent; cursor: pointer; text-decoration: none; line-height: var(--lh-normal);
  transition: transform var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.syn-btn-primary {
  font-weight: var(--fw-bold); color: var(--on-depth); background-image: var(--grad-depth-ink);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.25) inset, 0 10px 30px rgba(31, 179, 207, 0.26);
}
.syn-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 1px 0 rgba(255, 255, 255, 0.3) inset, 0 14px 38px rgba(31, 179, 207, 0.4); color: var(--on-depth); }
.syn-btn-secondary { font-weight: var(--fw-semibold); border-color: var(--button-outline); color: var(--text-display); background: transparent; }
.syn-btn-secondary:hover { border-color: var(--border-opal); color: var(--text-display); }
.syn-btn:active { transform: translateY(1px); }

.syn-eyebrow { font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: var(--ls-widest); text-transform: uppercase; color: var(--accent-ink); display: inline-block; }
.syn-eyebrow-kicker { font-size: 15px; font-weight: var(--fw-bold); letter-spacing: 0.2em; }

.syn-card {
  position: relative; overflow: hidden; display: block;
  background: var(--surface-card); border: var(--bw-hair) solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: 30px 28px; box-shadow: var(--sheen-top), var(--shadow-md); color: var(--text-body); text-decoration: none;
}
.syn-card-link { transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out); }
.syn-card-link:hover { border-color: var(--border-opal); transform: translateY(-3px); }
.syn-card-rule { position: absolute; top: 0; left: 0; right: 0; height: var(--bw-thick); background: var(--grad-rule); }
.syn-card-index { font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.12em; color: var(--accent-ink); }
.syn-card .syn-eyebrow { letter-spacing: 0.16em; }
.syn-card-name { display: flex; align-items: baseline; gap: 10px; }
.syn-card-product { font-size: 26px; font-weight: var(--fw-bold); color: var(--text-display); letter-spacing: var(--ls-snug); font-family: var(--font-display); }
.syn-card-tag { font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent-ink); }
.syn-card-title { font-size: var(--fs-h3); margin: 14px 0 10px; color: var(--text-display); }
.syn-card-title-sub { font-size: var(--fs-lg); font-weight: var(--fw-semibold); margin: 12px 0 10px; }
.syn-card-body { color: var(--text-secondary); font-size: var(--fs-body); line-height: 1.6; }
.syn-card-body p { margin: 0; }
.syn-card-cta { display: inline-block; margin-top: 18px; font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.1em; color: var(--accent-ink); }

.syn-checklist { display: flex; flex-direction: column; gap: var(--space-4); }
.syn-check { display: flex; gap: 14px; align-items: flex-start; }
.syn-check-mark { font-family: var(--font-mono); color: var(--accent-ink); font-size: 15px; line-height: 1.5; }
.syn-check p { color: var(--text-body); font-size: var(--fs-body); line-height: 1.55; margin: 0; }

.syn-chip {
  display: inline-block; font-family: var(--font-mono); font-size: var(--fs-xs); letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-secondary); border: var(--bw-hair) solid var(--border-default); border-radius: var(--radius-pill); padding: var(--space-2) 15px; white-space: nowrap;
}

.syn-input {
  width: 100%; box-sizing: border-box; background: var(--well); border: var(--bw-hair) solid var(--well-border);
  border-radius: var(--radius-control); padding: 13px 15px; color: var(--text-body); font-family: var(--font-sans); font-size: var(--fs-body); outline: none;
  transition: border-color var(--dur-fast) var(--ease-out);
}
.syn-input::placeholder { color: var(--text-dim); opacity: 1; }
.syn-input:focus { border-color: var(--border-opal); box-shadow: none; }
.syn-textarea { resize: vertical; min-height: 96px; line-height: var(--lh-normal); }

.syn-feed-item {
  position: relative; overflow: hidden; background: var(--surface-card); border: var(--bw-hair) solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: 26px 28px 22px; margin: 0; box-shadow: var(--sheen-top), var(--shadow-md);
  transition: transform var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), box-shadow var(--dur-base) var(--ease-out);
}
.syn-feed-item:hover { transform: translateY(-2px); border-color: var(--border-opal); box-shadow: var(--sheen-top), var(--shadow-lg), var(--glow-opal); }
.syn-feed-item::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: var(--bw-thick); background: var(--grad-rule); opacity: 0.9; }
.syn-feed-item .syn-eyebrow { font-size: var(--fs-micro); margin-bottom: 2px; }
.syn-feed-item h2 { font-size: 20px; font-weight: var(--fw-bold); letter-spacing: var(--ls-snug); margin: 8px 0 8px; color: var(--text-display); font-family: var(--font-sans); }
.syn-feed-item h2 a { color: var(--text-display); text-decoration: none; }
.syn-feed-item h2 a:hover { color: var(--wave-sky); }
.syn-feed-item > p { font-family: var(--font-serif); font-size: 15.5px; line-height: 1.62; color: var(--text-secondary); margin: 0 0 6px; }
.syn-feed-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.1em; color: var(--text-tertiary); }
.syn-src { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.08em; color: var(--text-tertiary); margin-top: var(--space-3); }
.syn-src a { color: var(--wave-aqua); }

.syn-why { margin: 14px 0 4px; padding: 13px 16px; background: var(--surface-raised); border-left: 3px solid var(--wave-seafoam); border-radius: 0 10px 10px 0; }
.syn-why-label { font-family: var(--font-mono); font-size: var(--fs-micro); letter-spacing: 0.16em; text-transform: uppercase; color: var(--wave-seafoam); display: block; margin-bottom: 5px; }
.syn-why p { margin: 0; font-family: var(--font-serif); font-size: 15.5px; line-height: 1.62; color: var(--text-primary); }

.syn-emblem { --emblem-size: 410px; position: relative; display: flex; align-items: center; justify-content: center; width: 100%; min-height: calc(var(--emblem-size) * 1.07); }
.syn-emblem-coin { position: relative; width: var(--emblem-size); aspect-ratio: 1; border-radius: 50%; object-fit: cover; border: 1px solid var(--emblem-ring); box-shadow: var(--glow-emblem); }
.syn-dust { position: absolute; border-radius: 50%; pointer-events: none; }
.syn-dust-1 { width: calc(var(--emblem-size) * 1.66); height: calc(var(--emblem-size) * 1.66); animation: syn-dust-a 46s linear infinite;
  background-image: radial-gradient(3px 3px at 8% 32%, color-mix(in srgb, var(--dust-gold) 95%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 22% 12%, color-mix(in srgb, var(--dust-amber) 80%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 76% 18%, color-mix(in srgb, var(--dust-pale) 90%, transparent) 0%, transparent 60%), radial-gradient(3px 3px at 90% 42%, color-mix(in srgb, var(--dust-amber) 75%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 84% 74%, color-mix(in srgb, var(--dust-gold) 85%, transparent) 0%, transparent 60%), radial-gradient(3px 3px at 58% 92%, color-mix(in srgb, var(--dust-pale) 70%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 30% 86%, color-mix(in srgb, var(--dust-amber) 80%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 10% 64%, color-mix(in srgb, var(--dust-pale) 75%, transparent) 0%, transparent 60%), radial-gradient(46px 12px at 70% 30%, color-mix(in srgb, var(--dust-amber) 13%, transparent) 0%, transparent 70%), radial-gradient(64px 16px at 25% 70%, color-mix(in srgb, var(--dust-gold) 11%, transparent) 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle, transparent 0%, transparent 30%, rgba(0,0,0,1) 42%, rgba(0,0,0,0.85) 62%, transparent 79%); mask-image: radial-gradient(circle, transparent 0%, transparent 30%, rgba(0,0,0,1) 42%, rgba(0,0,0,0.85) 62%, transparent 79%); }
.syn-dust-2 { width: calc(var(--emblem-size) * 1.32); height: calc(var(--emblem-size) * 1.32); animation: syn-dust-b 68s linear infinite;
  background-image: radial-gradient(2px 2px at 14% 22%, color-mix(in srgb, var(--dust-pale) 85%, transparent) 0%, transparent 60%), radial-gradient(1.5px 1.5px at 40% 6%, color-mix(in srgb, var(--dust-amber) 70%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 88% 30%, color-mix(in srgb, var(--dust-gold) 80%, transparent) 0%, transparent 60%), radial-gradient(1.5px 1.5px at 94% 60%, color-mix(in srgb, var(--dust-pale) 65%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 66% 94%, color-mix(in srgb, var(--dust-amber) 75%, transparent) 0%, transparent 60%), radial-gradient(1.5px 1.5px at 18% 88%, color-mix(in srgb, var(--dust-gold) 70%, transparent) 0%, transparent 60%), radial-gradient(1.5px 1.5px at 4% 48%, color-mix(in srgb, var(--dust-pale) 60%, transparent) 0%, transparent 60%);
  -webkit-mask-image: radial-gradient(circle, transparent 0%, transparent 38%, rgba(0,0,0,1) 52%, transparent 88%); mask-image: radial-gradient(circle, transparent 0%, transparent 38%, rgba(0,0,0,1) 52%, transparent 88%); }
.syn-dust-3 { width: calc(var(--emblem-size) * 1.9); height: calc(var(--emblem-size) * 1.9); animation: syn-dust-a 92s linear infinite;
  background-image: radial-gradient(3.5px 3.5px at 12% 40%, color-mix(in srgb, var(--dust-pale) 90%, transparent) 0%, transparent 60%), radial-gradient(2.5px 2.5px at 34% 8%, color-mix(in srgb, var(--dust-amber) 70%, transparent) 0%, transparent 60%), radial-gradient(3px 3px at 68% 5%, color-mix(in srgb, var(--dust-gold) 80%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 93% 34%, color-mix(in srgb, var(--dust-pale) 70%, transparent) 0%, transparent 60%), radial-gradient(3.5px 3.5px at 96% 62%, color-mix(in srgb, var(--dust-amber) 65%, transparent) 0%, transparent 60%), radial-gradient(2.5px 2.5px at 74% 92%, color-mix(in srgb, var(--dust-pale) 75%, transparent) 0%, transparent 60%), radial-gradient(2px 2px at 42% 96%, color-mix(in srgb, var(--dust-gold) 70%, transparent) 0%, transparent 60%), radial-gradient(3px 3px at 8% 76%, color-mix(in srgb, var(--dust-amber) 60%, transparent) 0%, transparent 60%), radial-gradient(90px 14px at 50% 12%, color-mix(in srgb, var(--dust-gold) 9%, transparent) 0%, transparent 70%), radial-gradient(110px 18px at 55% 88%, color-mix(in srgb, var(--dust-amber) 8%, transparent) 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle, transparent 0%, transparent 50%, rgba(0,0,0,0.9) 62%, rgba(0,0,0,0.6) 76%, transparent 90%); mask-image: radial-gradient(circle, transparent 0%, transparent 50%, rgba(0,0,0,0.9) 62%, rgba(0,0,0,0.6) 76%, transparent 90%); }
.syn-dust-4 { width: calc(var(--emblem-size) * 1.15); height: calc(var(--emblem-size) * 1.15); animation: syn-dust-b 34s linear infinite;
  background-image: radial-gradient(1.6px 1.6px at 20% 16%, color-mix(in srgb, var(--dust-pale) 90%, transparent) 0%, transparent 60%), radial-gradient(1.3px 1.3px at 52% 4%, color-mix(in srgb, var(--dust-pale) 80%, transparent) 0%, transparent 60%), radial-gradient(1.8px 1.8px at 84% 20%, color-mix(in srgb, var(--dust-pale) 85%, transparent) 0%, transparent 60%), radial-gradient(1.3px 1.3px at 97% 52%, color-mix(in srgb, var(--dust-gold) 70%, transparent) 0%, transparent 60%), radial-gradient(1.6px 1.6px at 80% 86%, color-mix(in srgb, var(--dust-pale) 80%, transparent) 0%, transparent 60%), radial-gradient(1.3px 1.3px at 46% 97%, color-mix(in srgb, var(--dust-amber) 70%, transparent) 0%, transparent 60%), radial-gradient(1.8px 1.8px at 12% 80%, color-mix(in srgb, var(--dust-pale) 75%, transparent) 0%, transparent 60%), radial-gradient(1.3px 1.3px at 3% 46%, color-mix(in srgb, var(--dust-pale) 70%, transparent) 0%, transparent 60%);
  -webkit-mask-image: radial-gradient(circle, transparent 0%, transparent 82%, rgba(0,0,0,1) 90%, transparent 100%); mask-image: radial-gradient(circle, transparent 0%, transparent 82%, rgba(0,0,0,1) 90%, transparent 100%); }
@keyframes syn-dust-a { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
@keyframes syn-dust-b { from { transform: rotate(360deg); } to { transform: rotate(0deg); } }
@media (max-width: 920px) { .syn-emblem { --emblem-size: min(300px, 78vw); } .syn-dust { width: 420px; height: 420px; } }
@media (prefers-reduced-motion: reduce) { .syn-dust { animation: none; } }

@media (prefers-reduced-motion: reduce) {
  .syn-btn, .syn-card-link, .syn-feed-item, .syn-input, .syn-band nav a { transition-duration: 0.001ms; }
}