/* SetBro AI website (D-125): Training HUD tokens (docs/design/training-hud/tokens.json), night + daylight. */

@font-face { font-family: Tektur; font-weight: 600; font-display: swap; src: url(/assets/fonts/tektur-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: Tektur; font-weight: 600; font-display: swap; src: url(/assets/fonts/tektur-cyrillic-600-normal.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: Geologica; font-weight: 400; font-display: swap; src: url(/assets/fonts/geologica-latin-400-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: Geologica; font-weight: 400; font-display: swap; src: url(/assets/fonts/geologica-cyrillic-400-normal.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: Geologica; font-weight: 600; font-display: swap; src: url(/assets/fonts/geologica-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: Geologica; font-weight: 600; font-display: swap; src: url(/assets/fonts/geologica-cyrillic-600-normal.woff2) format("woff2"); unicode-range: U+0301, U+0400-045F, U+0490-0491, U+04B0-04B1, U+2116; }
@font-face { font-family: "JetBrains Mono"; font-weight: 600; font-display: swap; src: url(/assets/fonts/jetbrains-mono-latin-600-normal.woff2) format("woff2"); unicode-range: U+0000-00FF, U+2000-206F; }
@font-face { font-family: "JetBrains Mono"; font-weight: 600; font-display: swap; src: url(/assets/fonts/jetbrains-mono-cyrillic-600-normal.woff2) format("woff2"); unicode-range: U+0400-045F; }

:root {
  --display: Tektur, Geologica, system-ui, sans-serif;
  --body: Geologica, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --data: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --ch-sm: 6px; --ch-md: 12px; --ch-lg: 20px;
  --gutter: 16px;
  /* Night (identity) */
  --bg: #05080c; --surface: #0b1219; --elevated: #121c26; --grid: #0f1a24;
  --border: #22313f; --border-strong: #5c7486;
  --text: #e6f1f7; --muted: #8fa3b3;
  --primary: #3fe0d0; --on-primary: #031214; --primary-muted: #1d7f78;
  --accent: #ffb23f; --success: #7cc4ff; --danger: #ff6b5a; --on-danger: #1a0402;
  --glow: 0 0 16px rgba(63, 224, 208, 0.35);
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #eef3f6; --surface: #ffffff; --elevated: #f6fafc; --grid: #e2eaef;
    --border: #c9d6df; --border-strong: #6e8494;
    --text: #0a1620; --muted: #4c5e6c;
    --primary: #00756b; --on-primary: #ffffff; --primary-muted: #9adbd4;
    --accent: #8f5400; --success: #0b62a8; --danger: #b8301d; --on-danger: #ffffff;
    --glow: 0 1px 3px rgba(10, 22, 32, 0.16);
    color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #eef3f6; --surface: #ffffff; --elevated: #f6fafc; --grid: #e2eaef;
  --border: #c9d6df; --border-strong: #6e8494;
  --text: #0a1620; --muted: #4c5e6c;
  --primary: #00756b; --on-primary: #ffffff; --primary-muted: #9adbd4;
  --accent: #8f5400; --success: #0b62a8; --danger: #b8301d; --on-danger: #ffffff;
  --glow: 0 1px 3px rgba(10, 22, 32, 0.16);
  color-scheme: light;
}

/* Theme-specific screenshots: night by default, daylight when the light theme is active. */
.only-daylight { display: none; }
:root[data-theme="light"] .only-night { display: none; }
:root[data-theme="light"] .only-daylight { display: block; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) .only-night { display: none; }
  :root:not([data-theme]) .only-daylight { display: block; }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 80px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; animation: none !important; } }
body {
  margin: 0; min-height: 100vh; overflow-x: hidden;
  background-color: var(--bg);
  background-image: radial-gradient(var(--grid) 1.2px, transparent 1.4px);
  background-size: 24px 24px;
  color: var(--text); font: 400 16px/1.5 var(--body);
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
main:focus { outline: none; }
h1, h2, h3 { font-family: var(--display); font-weight: 600; line-height: 1.15; margin: 0 0 12px; letter-spacing: 0.01em; text-wrap: balance; }
h1 { font-size: clamp(34px, 7vw, 60px); }
h2 { font-size: clamp(26px, 4.5vw, 38px); }
h3 { font-size: clamp(22px, 3.2vw, 28px); }
p { margin: 0 0 16px; }
.hud-label { font: 600 12px/16px var(--body); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
.accent-label { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 14px; }
.center { text-align: center; }
.narrow { max-width: 640px; margin-inline: auto; }
.lead { font-size: clamp(17px, 2.2vw, 20px); color: var(--muted); }
.icon { flex: none; vertical-align: middle; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--border); }
.bar { max-width: 1120px; margin: 0 auto; padding: 8px var(--gutter); display: flex; align-items: center; gap: 12px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text); text-decoration: none; font: 600 20px/1 var(--display); margin: 0; }
.brand b { color: var(--primary); font-weight: 600; }
.nav { display: none; gap: 24px; margin-left: 24px; }
.nav a { color: var(--text); text-decoration: none; font-weight: 600; }
.nav a:hover { color: var(--primary); }
.tools { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.lang, .theme-toggle { display: inline-flex; align-items: center; justify-content: center; gap: 4px; min-width: 44px; min-height: 44px; padding: 0 8px; color: var(--text); background: none; border: 0; font: 600 13px/1 var(--body); letter-spacing: 0.08em; text-decoration: none; cursor: pointer; }
.lang:hover, .theme-toggle:hover { color: var(--primary); }
.skip { position: absolute; left: 8px; top: -60px; background: var(--primary); color: var(--on-primary); padding: 12px 16px; z-index: 20; font-weight: 600; }
.skip:focus { top: 8px; }
.site-header .btn-small { display: none; }
@media (min-width: 900px) { .nav { display: flex; } .site-header .btn-small { display: inline-flex; } }

/* Buttons */
.btn {
  --cut: var(--ch-sm);
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 48px; padding: 12px 24px; border: 0; cursor: pointer;
  font: 600 16px/1.2 var(--body); text-decoration: none; text-align: center;
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
  transition: background-color 120ms, color 120ms;
}
.btn:focus-visible { outline: none; box-shadow: inset 0 0 0 3px var(--accent); }
.btn-primary { background: var(--primary); color: var(--on-primary); }
.btn-primary:hover { background: color-mix(in srgb, var(--primary) 85%, var(--text)); }
.btn-danger { background: var(--danger); color: var(--on-danger); }
.btn-danger:hover { background: color-mix(in srgb, var(--danger) 85%, var(--text)); }
.btn-outline { background: transparent; color: var(--text); box-shadow: inset 0 0 0 1.5px var(--border-strong); }
.btn-outline:hover { color: var(--primary); box-shadow: inset 0 0 0 1.5px var(--primary); }
.btn-ghost { background: transparent; color: var(--primary); padding-inline: 12px; }
.btn-ghost:hover { text-decoration: underline; }
.btn-small { min-height: 40px; padding: 8px 16px; font-size: 14px; }
.btn-block { width: 100%; }
.btn[disabled] { opacity: 0.6; cursor: progress; }

/* Panels: chamfered top-left and bottom-right corners with a hairline frame. */
.panel {
  --cut: var(--ch-md);
  position: relative; isolation: isolate; padding: 24px var(--gutter);
  background: var(--border);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.panel::before {
  content: ""; position: absolute; inset: 1px; z-index: -1; background: var(--surface);
  clip-path: polygon(calc(var(--cut) - 0.5px) 0, 100% 0, 100% calc(100% - var(--cut) + 0.5px), calc(100% - var(--cut) + 0.5px) 100%, 0 100%, 0 calc(var(--cut) - 0.5px));
}
.brackets::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(var(--accent), var(--accent)) top right / 20px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) top right / 2px 20px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom left / 20px 2px no-repeat,
    linear-gradient(var(--accent), var(--accent)) bottom left / 2px 20px no-repeat;
}

/* Layout */
main { max-width: 1120px; margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: 56px 0; border-top: 1px solid var(--border); }
@media (min-width: 900px) { :root { --gutter: 24px; } .section { padding: 88px 0; } }

/* Hero */
.hero { display: grid; gap: 32px; padding: 40px 0 56px; text-align: center; }
.hero .lead { max-width: 560px; margin-inline: auto; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 24px; }
.hero-media { justify-self: center; }
@media (min-width: 900px) {
  .hero { grid-template-columns: 1.15fr 0.85fr; align-items: center; text-align: start; padding: 72px 0 88px; }
  .hero .lead { margin-inline: 0; }
  .actions { justify-content: flex-start; }
}
.reticle { position: relative; padding: 20px; }
.reticle::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    linear-gradient(var(--border-strong), var(--border-strong)) top left / 24px 1.5px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) top left / 1.5px 24px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) top right / 24px 1.5px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) top right / 1.5px 24px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) bottom left / 24px 1.5px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) bottom left / 1.5px 24px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) bottom right / 24px 1.5px no-repeat,
    linear-gradient(var(--border-strong), var(--border-strong)) bottom right / 1.5px 24px no-repeat;
}

/* Phone frames around the real app renders */
.phone {
  --cut: var(--ch-lg);
  width: min(240px, 62vw); padding: 6px; background: var(--border-strong);
  clip-path: polygon(var(--cut) 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%, 0 var(--cut));
}
.phone img { clip-path: polygon(calc(var(--cut) - 4px) 0, 100% 0, 100% calc(100% - var(--cut) + 4px), calc(100% - var(--cut) + 4px) 100%, 0 100%, 0 calc(var(--cut) - 4px)); aspect-ratio: 480 / 923; object-fit: cover; object-position: top; }
.hero .phone { width: min(280px, 70vw); }
.phones { display: flex; gap: 16px; justify-content: center; }
.phones .phone { width: min(200px, 42vw); }
.phones .phone:nth-child(2) { margin-top: 40px; }
.map { max-width: 520px; margin-inline: auto; }

/* Features */
.feature { display: grid; gap: 28px; align-items: center; padding: 40px 0; }
.feature-text { max-width: 520px; }
.feature-media { display: flex; justify-content: center; }
@media (min-width: 900px) {
  .feature { grid-template-columns: 1fr 1fr; gap: 56px; padding: 56px 0; }
  .feature.flip .feature-text { order: 2; }
}
.checks { list-style: none; padding: 0; margin: 16px 0 0; display: grid; gap: 10px; }
.checks li { display: flex; gap: 10px; align-items: flex-start; }
.checks .icon { color: var(--primary); margin-top: 3px; }

/* Status */
.steps { list-style: none; padding: 0; margin: 32px 0 0; display: grid; gap: 16px; }
@media (min-width: 720px) { .steps { grid-template-columns: repeat(3, 1fr); } }
.step h3 { font-size: 22px; }
.step p:last-child { margin: 0; }
.step-now .hud-label { color: var(--primary); }
.step-now .hud-label::before { content: ""; display: inline-block; width: 8px; height: 8px; border-radius: 999px; background: var(--primary); margin-right: 8px; vertical-align: 1px; box-shadow: var(--glow); }

/* Forms */
.form-panel { max-width: 560px; margin: 0 auto; }
.api-form { display: grid; gap: 16px; margin-top: 16px; }
.field { display: grid; gap: 6px; }
label { font-weight: 600; }
input[type="email"] {
  width: 100%; min-height: 48px; padding: 12px 14px; font: 400 16px/1.2 var(--body); color: var(--text);
  background: var(--elevated); border: 1.5px solid var(--border-strong); border-radius: 0;
}
input[type="email"]:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
input[aria-invalid="true"] { border-color: var(--danger); }
.hint { margin: 0; font-size: 14px; color: var(--muted); }
.check { display: flex; gap: 12px; align-items: flex-start; font-weight: 400; cursor: pointer; min-height: 44px; }
.check input { width: 22px; height: 22px; margin: 1px 0 0; accent-color: var(--primary); flex: none; }
.form-status { margin: 0; min-height: 24px; font-weight: 600; }
.form-status[data-state="ok"] { color: var(--success); }
.form-status[data-state="error"] { color: var(--danger); }
.form-status[data-state="ok"]::before { content: "✓ "; }
.form-status[data-state="error"]::before { content: "! "; }

/* FAQ */
.faq { max-width: 760px; margin: 32px auto 0; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary { display: flex; justify-content: space-between; gap: 16px; align-items: center; min-height: 56px; padding: 12px 0; cursor: pointer; font-weight: 600; font-size: 18px; list-style: none; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .icon { color: var(--primary); transition: transform 200ms; }
.faq-item[open] summary .icon { transform: rotate(180deg); }
.faq-item p { color: var(--muted); padding-bottom: 8px; }

/* Documents */
.doc { max-width: 760px; margin: 0 auto; padding: 40px 0 72px; }
.narrow-doc { max-width: 560px; }
.doc h1 { font-size: clamp(30px, 6vw, 44px); }
.alert { display: flex; gap: 12px; align-items: flex-start; margin: 16px 0 24px; }
.alert .icon { color: var(--accent); margin-top: 2px; }
.alert p { margin: 0; font-weight: 600; }
.prose ul, .prose ol { padding-inline-start: 22px; }
.prose li { margin-bottom: 10px; }
.prose code { font: 600 0.9em var(--data); }
.prose blockquote { margin: 0 0 20px; padding: 12px 16px; border-inline-start: 3px solid var(--border-strong); background: var(--elevated); }
.prose blockquote.review-note { border-color: var(--accent); }
.prose blockquote p { margin: 0; }
.review-tag { display: inline-block; font: 600 11px/1.6 var(--body); letter-spacing: 0.1em; padding: 0 6px; color: var(--accent); border: 1px solid var(--accent); vertical-align: 1px; }
.doc-more { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); }
.doc-more ul { padding-inline-start: 20px; }
.cards { display: grid; gap: 16px; margin-top: 24px; }
.card { margin: 16px 0; }
.card h2 { font-size: 22px; }
.card p:last-child, .card ol:last-child { margin-bottom: 0; }
.plain { padding: 8px 0; }
.numbered { padding-inline-start: 22px; margin: 0; }
.numbered li { margin-bottom: 8px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: var(--surface); padding: 40px var(--gutter) 24px; }
.footer-grid { max-width: 1120px; margin: 0 auto; display: grid; gap: 24px; grid-template-columns: 1fr 1fr; }
.footer-brand { grid-column: 1 / -1; }
@media (min-width: 900px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } .footer-brand { grid-column: auto; } }
.site-footer ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 4px; }
.site-footer li a, .site-footer li > span { display: inline-flex; align-items: center; gap: 4px; min-height: 36px; }
.site-footer a { color: var(--text); text-decoration: none; }
.site-footer a:hover { color: var(--primary); text-decoration: underline; }
.copy { max-width: 1120px; margin: 24px auto 0; padding-top: 16px; border-top: 1px solid var(--border); }