/* Cubed Creation — dark atmospheric site. No external assets, no scripts. */
:root {
  color-scheme: dark;
  --night: #071719; --deep: #0b1f21; --ink: #102d2f;
  --tide: #08756b; --air: #67e0cd; --sky: #78b5e8; --dawn: #f3b56b;
  --text: #e9f6f3; --text-2: #a9c7c3; --text-3: rgba(233, 246, 243, .55);
  --glass: rgba(255, 255, 255, .055); --glass-2: rgba(255, 255, 255, .09);
  --line: rgba(255, 255, 255, .12); --radius: 22px; --max: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; min-height: 100vh; color: var(--text); background: var(--night);
  font: 17px/1.6 ui-rounded, -apple-system, BlinkMacSystemFont, "SF Pro Rounded", "Segoe UI", Inter, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
}
/* Atmosphere: night canvas, fine diagonal hairlines, horizon glow, a point of dawn light. */
.atmosphere { position: fixed; inset: 0; z-index: -1; overflow: hidden;
  background: radial-gradient(60% 45% at 50% 100%, rgba(8,117,107,.55) 0%, rgba(8,117,107,.18) 45%, transparent 75%),
              linear-gradient(180deg, #05121a 0%, var(--night) 45%, #0a2a2c 100%); }
.atmosphere::before { content: ""; position: absolute; inset: -20%;
  background: repeating-linear-gradient(112deg, rgba(255,255,255,.035) 0 1px, transparent 1px 84px); }
.atmosphere .horizon { position: absolute; left: 50%; bottom: -62vw; width: 180vw; height: 180vw; margin-left: -90vw; border-radius: 50%;
  border-top: 1px solid rgba(103,224,205,.55);
  box-shadow: 0 -30px 120px rgba(103,224,205,.18), 0 -6px 30px rgba(103,224,205,.25); }
.atmosphere .dawn { position: absolute; width: 26px; height: 26px; border-radius: 50%; left: 68%; top: 34%; background: var(--dawn);
  box-shadow: 0 0 24px 8px rgba(243,181,107,.45), 0 0 90px 30px rgba(243,181,107,.15);
  animation: drift 18s ease-in-out infinite alternate; }
.atmosphere .haze { position: absolute; left: 10%; top: 8%; width: 60vw; height: 60vw; border-radius: 50%;
  background: radial-gradient(circle, rgba(120,181,232,.12), transparent 60%);
  animation: drift 26s ease-in-out infinite alternate-reverse; }
@keyframes drift { from { transform: translate3d(0,0,0); } to { transform: translate3d(-2vw, 1.5vw, 0); } }
@media (prefers-reduced-motion: reduce) { .atmosphere .dawn, .atmosphere .haze { animation: none; } }
/* Navigation */
nav.top { position: sticky; top: 0; z-index: 10; backdrop-filter: blur(18px) saturate(140%); -webkit-backdrop-filter: blur(18px) saturate(140%);
  background: rgba(7,23,25,.55); border-bottom: 1px solid var(--line); }
nav.top .wrap { max-width: var(--max); margin: 0 auto; padding: 14px 24px; display: flex; align-items: center; gap: 18px; }
nav.top .brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; letter-spacing: .02em; }
nav.top .brand .cube { width: 22px; height: 22px; border-radius: 6px; background: linear-gradient(135deg, var(--air), var(--tide)); box-shadow: 0 0 18px rgba(103,224,205,.45); }
nav.top .links { margin-left: auto; display: flex; gap: 6px; }
nav.top .links a { color: var(--text-2); text-decoration: none; padding: 8px 12px; border-radius: 999px; font-size: .95rem; }
nav.top .links a:hover, nav.top .links a[aria-current] { color: var(--text); background: var(--glass-2); }
/* Four links do not fit beside the wordmark on a phone: keep the cube, drop the words, tighten the links. */
@media (max-width: 560px) {
  nav.top .wrap { padding: 12px 14px; gap: 8px; }
  nav.top .brand { font-size: 0; gap: 0; }
  nav.top .links { gap: 2px; min-width: 0; }
  nav.top .links a { padding: 8px 9px; font-size: .9rem; white-space: nowrap; }
}
/* Layout and type */
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }
main { padding-bottom: 96px; }
section { margin-top: 56px; }
.eyebrow { color: var(--air); text-transform: uppercase; letter-spacing: .18em; font-size: .78rem; font-weight: 700; margin: 0 0 12px; }
h1, h2, h3 { line-height: 1.12; margin: 0 0 .4em; letter-spacing: -.01em; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); font-weight: 750; }
h3 { font-size: 1.15rem; font-weight: 700; }
p { margin: 0 0 1em; }
.lead { font-size: clamp(1.1rem, 2vw, 1.35rem); color: var(--text-2); max-width: 46ch; }
.muted { color: var(--text-2); }
.small { font-size: .9rem; color: var(--text-3); }
a { color: var(--air); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
.glow { background: linear-gradient(90deg, #f3fffd 0%, var(--air) 55%, var(--dawn) 130%); -webkit-background-clip: text; background-clip: text; color: transparent; }
/* Hero */
.hero { padding: 96px 0 24px; }
.hero .grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.hero .icon { justify-self: center; }
.hero .icon img { width: min(300px, 60vw); height: auto; border-radius: 22.37%;
  box-shadow: 0 30px 80px rgba(0,0,0,.55), 0 0 0 1px var(--line), 0 0 120px rgba(103,224,205,.18); }
@media (max-width: 760px) { .hero { padding-top: 56px; } .hero .grid { grid-template-columns: 1fr; gap: 28px; } .hero .icon { order: -1; } }
/* Buttons and pills */
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 22px; border-radius: 999px; font-weight: 700; text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn.primary { background: var(--air); color: var(--ink); box-shadow: 0 10px 30px rgba(103,224,205,.28); }
.btn.primary:hover { box-shadow: 0 14px 36px rgba(103,224,205,.4); }
.btn.ghost { background: var(--glass); color: var(--text); border: 1px solid var(--line); }
.btn.ghost:hover { background: var(--glass-2); }
.pill { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--glass); border: 1px solid var(--line); color: var(--text-2); font-size: .85rem; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--dawn); box-shadow: 0 0 10px var(--dawn); }
/* Glass cards */
.cards { display: grid; gap: 18px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { position: relative; padding: 26px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03)); border: 1px solid var(--line);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); box-shadow: 0 20px 50px rgba(0,0,0,.35);
  transition: transform .2s ease, border-color .2s ease; color: inherit; }
.card:hover { transform: translateY(-3px); border-color: rgba(103,224,205,.35); text-decoration: none; }
.card h3 { margin-top: 8px; }
.card .k { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: 14px; background: rgba(103,224,205,.12); color: var(--air); font-weight: 800; font-size: 1.1rem; }
.card p:last-child { margin-bottom: 0; }
.card.feature { grid-column: 1 / -1; display: grid; grid-template-columns: 96px 1fr auto; gap: 24px; align-items: center; }
.card.feature img { width: 96px; height: 96px; border-radius: 21px; box-shadow: 0 12px 30px rgba(0,0,0,.45); }
@media (max-width: 640px) { .card.feature { grid-template-columns: 1fr; } }
/* Two-column boundary */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
@media (max-width: 720px) { .split { grid-template-columns: 1fr; } }
.split .card ul { padding-left: 1.1em; margin: 0; }
.split .card li { margin: .35em 0; color: var(--text-2); }
.split .card li strong { color: var(--text); }
.card.premium { border-color: rgba(243,181,107,.35); background: linear-gradient(180deg, rgba(243,181,107,.10), rgba(255,255,255,.03)); }
/* Long-form pages */
.prose { max-width: 720px; }
.prose .panel { padding: clamp(22px, 4vw, 40px); border-radius: var(--radius); background: rgba(255,255,255,.045); border: 1px solid var(--line);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.prose h2 { font-size: 1.35rem; margin-top: 2em; padding-top: 1.2em; border-top: 1px solid var(--line); }
.prose h2:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.prose ul { padding-left: 1.2em; }
.prose li { margin: .4em 0; color: var(--text-2); }
.prose strong, .prose p strong, .prose p a { color: var(--text); }
.prose p { color: var(--text-2); }
.prose p a { text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(103,224,205,.5); }
.qa dt { font-weight: 700; margin-top: 1.2em; }
.qa dd { margin: .3em 0 0; color: var(--text-2); }
.crumbs { font-size: .9rem; color: var(--text-3); margin: 0 0 18px; }
.crumbs a { color: var(--text-2); }
.headline { padding: 72px 0 36px; }
.headline p.lead { margin-top: 10px; }
/* Footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--text-3); font-size: .9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 8px 22px; align-items: center; }
footer a { color: var(--text-2); }
footer .spacer { flex: 1; }
::selection { background: rgba(103,224,205,.35); }

/* Calculator */
.calc .field { margin: 18px 0 8px; }
.calc label { display: block; font-weight: 650; color: var(--text); margin-bottom: 10px; }
.calc .money { display: inline-flex; align-items: center; gap: 10px; padding: 6px 16px; border-radius: 14px; background: rgba(0,0,0,.28); border: 1px solid var(--line); color: var(--text-2); font-size: 1.2rem; }
.calc .money:focus-within { border-color: var(--air); box-shadow: 0 0 0 3px rgba(103,224,205,.18); }
.calc input[type=number] { width: 7.5ch; padding: 8px 0; border: 0; outline: 0; background: transparent; color: var(--text); font: inherit; font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; -moz-appearance: textfield; }
.calc input[type=number]::-webkit-outer-spin-button, .calc input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.calc .hint { font-size: .9rem; color: var(--text-3); margin: 10px 0 0; }
.calc .tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0 10px; }
.calc .tiles.two { grid-template-columns: repeat(2, 1fr); }
.calc .tile { display: flex; flex-direction: column; gap: 4px; padding: 16px 18px; border-radius: 16px; background: rgba(255,255,255,.05); border: 1px solid var(--line); }
.calc .tile.strong { background: rgba(103,224,205,.12); border-color: rgba(103,224,205,.4); }
.calc .tile .num { font-size: clamp(1.25rem, 3.4vw, 1.7rem); font-weight: 800; color: var(--text); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.calc .tile .cap { font-size: .88rem; color: var(--text-2); }
@media (max-width: 560px) { .calc .tiles, .calc .tiles.two { grid-template-columns: 1fr; } }