:root {
  --ink: #eef6fb;
  --muted: #9fb1c2;
  --paper: #07111f;
  --panel: #0d1a2a;
  --panel-2: #101f31;
  --line: rgba(168, 197, 218, .16);
  --mint: #42e8c5;
  --mint-dark: #061a18;
  --blue: #65a8ff;
  --danger: #ff9c8f;
  --shadow: 0 24px 70px rgba(0, 0, 0, .32);
  --radius: 22px;
  --max: 1180px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; line-height: 1.55; }
body::before { content: ""; position: fixed; inset: 0; pointer-events: none; background: radial-gradient(circle at 78% 8%, rgba(50, 129, 182, .16), transparent 28%), linear-gradient(rgba(255,255,255,.018) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.018) 1px, transparent 1px); background-size: auto, 56px 56px, 56px 56px; mask-image: linear-gradient(to bottom, #000, transparent 70%); }
a { color: inherit; }
button, input, textarea { font: inherit; }
.skip-link { position: fixed; z-index: 99; left: 1rem; top: 1rem; padding: .7rem 1rem; background: var(--mint); color: #04110f; transform: translateY(-160%); border-radius: 8px; }
.skip-link:focus { transform: none; }
.site-header { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; min-height: 82px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--line); position: relative; z-index: 2; }
.brand { display: inline-flex; align-items: center; gap: .75rem; text-decoration: none; font-weight: 760; letter-spacing: -.02em; }
.brand-mark { width: 2.1rem; height: 2.1rem; display: grid; place-items: center; border: 1px solid rgba(66,232,197,.5); border-radius: 8px; background: rgba(66,232,197,.09); color: var(--mint); font-size: .75rem; letter-spacing: .04em; }
nav { display: flex; align-items: center; gap: 1.7rem; }
nav a { color: var(--muted); text-decoration: none; font-size: .9rem; transition: color .2s ease; }
nav a:hover, nav a:focus-visible { color: var(--ink); }
.nav-purchase { padding: .6rem .85rem; border: 1px solid var(--line); border-radius: 10px; }
main, footer { position: relative; z-index: 1; }
.hero, .workspace, .ai-section, .guide, .purchase, footer { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
.hero { min-height: 660px; display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(2.5rem, 6vw, 6rem); align-items: center; padding: 6rem 0 5rem; }
.eyebrow { margin: 0 0 1rem; color: var(--mint); text-transform: uppercase; letter-spacing: .13em; font-weight: 720; font-size: .72rem; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(3rem, 6vw, 5.7rem); line-height: .98; letter-spacing: -.065em; max-width: 760px; margin-bottom: 1.7rem; }
h2 { font-size: clamp(2.15rem, 4vw, 3.55rem); line-height: 1.05; letter-spacing: -.045em; margin-bottom: 0; }
h3 { letter-spacing: -.025em; }
.hero-lede { max-width: 630px; color: var(--muted); font-size: 1.12rem; margin-bottom: 2rem; }
.primary-button { display: inline-flex; align-items: center; gap: 1rem; background: var(--mint); color: #04110f; text-decoration: none; font-weight: 760; padding: .9rem 1.15rem; border-radius: 10px; box-shadow: 0 10px 30px rgba(66,232,197,.15); transition: transform .2s ease, box-shadow .2s ease; }
.primary-button:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(66,232,197,.23); }
.model-preview { background: linear-gradient(145deg, rgba(18,39,59,.92), rgba(9,21,35,.96)); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; transform: rotate(1deg); }
.preview-head { display: flex; justify-content: space-between; align-items: center; padding: 1.5rem 1.6rem; border-bottom: 1px solid var(--line); }
.preview-head div { display: grid; }
.preview-head span, .metric-row span, .chart-labels { color: var(--muted); font-size: .76rem; }
.preview-head strong { font-size: 1.05rem; }
.status { color: var(--mint) !important; background: rgba(66,232,197,.08); border: 1px solid rgba(66,232,197,.2); padding: .34rem .55rem; border-radius: 999px; }
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); padding: 1.4rem 1.6rem; gap: 1rem; }
.metric-row div { display: grid; gap: .25rem; }
.metric-row strong { font-size: 1.45rem; }
.chart { height: 190px; margin: .5rem 1.6rem 0; position: relative; border-left: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.chart svg { width: 100%; height: 100%; position: relative; z-index: 2; }
.trend { fill: none; stroke: var(--mint); stroke-width: 3; vector-effect: non-scaling-stroke; }
.area { fill: url(#fill); }
.grid-line { position: absolute; left: 0; right: 0; height: 1px; background: var(--line); }
.line-a { top: 25%; }.line-b { top: 50%; }.line-c { top: 75%; }
.chart-labels { display: flex; justify-content: space-between; padding: .7rem 1.6rem 1.4rem; }
.workspace, .ai-section, .guide, .purchase { padding: 6.5rem 0; border-top: 1px solid var(--line); }
.section-heading { display: grid; grid-template-columns: 1.3fr .7fr; gap: 3rem; align-items: end; margin-bottom: 3rem; }
.section-heading > p { color: var(--muted); margin-bottom: .25rem; max-width: 430px; }
.tool-shell { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: rgba(12, 27, 43, .78); box-shadow: var(--shadow); }
.tabs { display: flex; gap: .45rem; padding: .7rem; border-bottom: 1px solid var(--line); background: rgba(4,14,25,.45); }
.tabs button { border: 0; padding: .72rem 1rem; background: transparent; color: var(--muted); border-radius: 9px; cursor: pointer; font-weight: 650; }
.tabs button[aria-selected="true"] { background: rgba(66,232,197,.12); color: var(--mint); }
.tabs button:focus-visible, input:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid rgba(101,168,255,.75); outline-offset: 3px; }
.calculator-panel { display: grid; grid-template-columns: 1fr 1fr; min-height: 420px; }
.inputs, .results { padding: clamp(1.7rem, 4vw, 3.4rem); }
.inputs { border-right: 1px solid var(--line); }
.inputs h3 { font-size: 1.45rem; margin-bottom: 1.8rem; }
.inputs label { display: grid; grid-template-columns: 1fr auto; align-items: end; margin-bottom: 1.15rem; color: var(--muted); font-size: .88rem; }
.inputs label span { grid-column: 2; grid-row: 1; font-size: .72rem; text-transform: uppercase; letter-spacing: .08em; }
.inputs input { grid-column: 1 / -1; margin-top: .45rem; width: 100%; padding: .82rem .9rem; border-radius: 9px; border: 1px solid var(--line); color: var(--ink); background: rgba(2,11,19,.65); }
.results { display: flex; flex-direction: column; justify-content: center; background: linear-gradient(145deg, rgba(66,232,197,.065), transparent 60%); }
.result-label { color: var(--muted); }
.results > strong { font-size: clamp(3rem, 6vw, 5.5rem); line-height: 1; letter-spacing: -.06em; color: var(--mint); margin: .6rem 0 2rem; }
.result-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.result-grid div { display: grid; padding: 1rem 0; }
.result-grid div + div { border-left: 1px solid var(--line); padding-left: 1rem; }
.result-grid span { font-size: .78rem; color: var(--muted); }
.results p { color: var(--muted); margin: 1.2rem 0 0; }
.ai-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.ai-grid article { min-height: 300px; padding: 1.7rem; background: var(--panel); border: 1px solid var(--line); border-radius: 16px; display: flex; flex-direction: column; transition: transform .2s ease, border-color .2s ease; }
.ai-grid article:hover { transform: translateY(-4px); border-color: rgba(66,232,197,.38); }
.card-number { color: var(--mint); font: 700 .74rem ui-monospace, monospace; margin-bottom: auto; }
.ai-grid h3 { font-size: 1.55rem; margin: 2.6rem 0 .65rem; }
.ai-grid p { color: var(--muted); }
.roadmap-label { color: var(--blue); font-size: .78rem; margin-top: .5rem; }
.guide { display: grid; grid-template-columns: .72fr 1.28fr; gap: clamp(3rem, 8vw, 7rem); }
.guide-title { position: sticky; top: 2rem; align-self: start; }
.article-copy { color: #c6d4df; font-size: 1.05rem; }
.article-copy p { margin-bottom: 1.6rem; }
.purchase { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(3rem, 8vw, 7rem); }
.purchase-copy p:not(.eyebrow) { color: var(--muted); max-width: 440px; margin-top: 1.4rem; }
.purchase-form { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; padding: clamp(1.4rem, 3vw, 2.2rem); background: var(--panel); border: 1px solid var(--line); border-radius: 18px; }
.purchase-form label { display: grid; gap: .42rem; font-size: .84rem; color: var(--muted); }
.purchase-form label > span { font-size: .75rem; }
.purchase-form input, .purchase-form textarea { width: 100%; border: 1px solid var(--line); border-radius: 9px; background: #071321; color: var(--ink); padding: .78rem .85rem; resize: vertical; }
.purchase-form .full { grid-column: 1 / -1; }
.consent { display: flex !important; grid-template-columns: auto 1fr; align-items: flex-start; }
.consent input { width: 1rem; height: 1rem; margin-top: .2rem; accent-color: var(--mint); }
.purchase-form button { grid-column: 1 / -1; border: 0; border-radius: 9px; background: var(--mint); color: #04110f; font-weight: 780; padding: .9rem 1rem; cursor: pointer; }
.purchase-form button:hover { filter: brightness(1.08); }
.honey { position: absolute !important; left: -9999px !important; }
footer { min-height: 160px; border-top: 1px solid var(--line); display: grid; grid-template-columns: auto 1fr auto; gap: 3rem; align-items: center; color: var(--muted); font-size: .8rem; }
footer p { max-width: 620px; margin: 0; }
@media (max-width: 850px) {
  nav a:not(.nav-purchase) { display: none; }
  .hero, .section-heading, .guide, .purchase { grid-template-columns: 1fr; }
  .hero { padding-top: 4.5rem; min-height: auto; }
  .model-preview { transform: none; }
  .section-heading { gap: 1.4rem; }
  .calculator-panel { grid-template-columns: 1fr; }
  .inputs { border-right: 0; border-bottom: 1px solid var(--line); }
  .ai-grid { grid-template-columns: 1fr; }
  .ai-grid article { min-height: 230px; }
  .guide-title { position: static; }
  footer { grid-template-columns: 1fr; padding: 2.5rem 0; gap: 1.3rem; }
}
@media (max-width: 560px) {
  .site-header, .hero, .workspace, .ai-section, .guide, .purchase, footer { width: min(100% - 28px, var(--max)); }
  h1 { font-size: 3.15rem; }
  .metric-row { grid-template-columns: 1fr 1fr; }
  .metric-row div:last-child { grid-column: 1 / -1; }
  .tabs { overflow-x: auto; }
  .tabs button { white-space: nowrap; }
  .result-grid, .purchase-form { grid-template-columns: 1fr; }
  .result-grid div + div { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .purchase-form label, .purchase-form .full, .purchase-form button { grid-column: 1; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}