:root {
  color-scheme: dark;
  --ink: #eef7ff;
  --muted: #a9bdca;
  --faint: #7890a0;
  --night: #050c13;
  --navy: #07131e;
  --panel: #0b1b28;
  --panel-2: #102333;
  --line: #23445a;
  --line-strong: #37667f;
  --cyan: #62d5ff;
  --blue: #58a8ff;
  --amber: #f5bd67;
  --magenta: #ef53da;
  --green: #7bd7b4;
  --danger: #ff8090;
  --radius: 18px;
  --shadow: 0 24px 70px rgba(0, 0, 0, .35);
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--night);
  color: var(--ink);
  font-family: "Segoe UI", Inter, system-ui, -apple-system, sans-serif;
  font-size: 1rem;
  line-height: 1.65;
}
img { max-width: 100%; height: auto; }
a { color: var(--cyan); text-underline-offset: .2em; }
a:hover { color: #b9efff; }
button, input, select, textarea { font: inherit; }
button, .button { min-height: 44px; }

.skip-link {
  position: fixed; left: 1rem; top: -5rem; z-index: 1000;
  background: var(--cyan); color: #00111a; padding: .65rem 1rem; border-radius: 0 0 8px 8px; font-weight: 700;
}
.skip-link:focus { top: 0; }

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(5, 12, 19, .9); border-bottom: 1px solid rgba(98, 213, 255, .15);
  backdrop-filter: blur(16px);
}
.nav-wrap { width: min(var(--max), calc(100% - 2rem)); margin: auto; min-height: 74px; display: flex; align-items: center; gap: 1.5rem; }
.brand { display: inline-flex; align-items: center; gap: .75rem; color: var(--ink); text-decoration: none; font-weight: 750; letter-spacing: .01em; }
.brand img { width: 38px; height: 38px; border-radius: 9px; box-shadow: 0 0 0 1px rgba(98, 213, 255, .3); }
.brand small { display: block; color: var(--muted); font-size: .72rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; line-height: 1; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: .25rem; }
.site-nav a { color: var(--muted); text-decoration: none; padding: .55rem .75rem; border-radius: 8px; font-weight: 600; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--ink); background: rgba(98, 213, 255, .09); }
.nav-download { border: 1px solid var(--line-strong); margin-left: .25rem; }
.nav-toggle { display: none; margin-left: auto; background: transparent; color: var(--ink); border: 1px solid var(--line); border-radius: 8px; padding: .5rem .75rem; }

main { overflow: clip; }
.container { width: min(var(--max), calc(100% - 2rem)); margin-inline: auto; }
.section { padding: clamp(4rem, 8vw, 7.5rem) 0; }
.section-compact { padding: 3rem 0; }
.section-tint { background: var(--navy); border-block: 1px solid rgba(98, 213, 255, .1); }
.eyebrow { color: var(--cyan); font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; margin: 0 0 .8rem; }
h1, h2, h3 { line-height: 1.12; letter-spacing: -.025em; margin-top: 0; }
h1 { font-size: clamp(2.6rem, 6.8vw, 5.9rem); max-width: 14ch; margin-bottom: 1.35rem; }
h2 { font-size: clamp(2rem, 4.2vw, 3.65rem); max-width: 18ch; margin-bottom: 1.25rem; }
h3 { font-size: clamp(1.2rem, 2vw, 1.55rem); }
.lede { color: #c6d8e4; font-size: clamp(1.08rem, 1.8vw, 1.32rem); max-width: 66ch; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.5rem; }
.section-heading p:last-child { max-width: 52ch; color: var(--muted); }
.muted { color: var(--muted); }
.fine-print { color: var(--faint); font-size: .86rem; }

.hero { position: relative; padding: clamp(4rem, 9vw, 8.5rem) 0 4.5rem; min-height: 760px; }
.hero::before {
  content: ""; position: absolute; inset: -15% -5% auto 42%; height: 700px; opacity: .58; pointer-events: none;
  background:
    radial-gradient(circle at 20% 35%, var(--cyan) 0 3px, transparent 4px),
    radial-gradient(circle at 72% 22%, var(--magenta) 0 3px, transparent 4px),
    radial-gradient(circle at 84% 70%, var(--amber) 0 3px, transparent 4px),
    linear-gradient(125deg, transparent 32%, rgba(98,213,255,.17) 32.2%, rgba(98,213,255,.17) 32.5%, transparent 32.7%),
    linear-gradient(28deg, transparent 54%, rgba(239,83,218,.13) 54.2%, rgba(239,83,218,.13) 54.5%, transparent 54.7%),
    radial-gradient(ellipse at center, rgba(37,104,145,.2), transparent 68%);
}
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, .92fr) minmax(520px, 1.28fr); gap: clamp(2rem, 5vw, 5rem); align-items: center; }
.hero-copy { z-index: 2; }
.hero-copy h1 span { color: var(--cyan); }
.hero-actions, .action-row { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: 2rem; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; padding: .72rem 1rem; border: 1px solid var(--line-strong); border-radius: 9px; text-decoration: none; font-weight: 750; cursor: pointer; }
.button-primary { background: var(--cyan); color: #00121d; border-color: var(--cyan); }
.button-primary:hover { background: #b5edff; color: #00121d; }
.button-secondary { background: rgba(98,213,255,.07); color: var(--ink); }
.button-secondary:hover { background: rgba(98,213,255,.14); color: var(--ink); }
.button:disabled, .button[aria-disabled="true"] { opacity: .42; cursor: not-allowed; }
.hero-meta { display: flex; flex-wrap: wrap; gap: .65rem 1.25rem; color: var(--muted); font-size: .9rem; margin-top: 2rem; }
.hero-meta span::before { content: ""; display: inline-block; width: 6px; height: 6px; border-radius: 50%; background: var(--green); margin: 0 .5rem .12rem 0; }

.app-shot { position: relative; margin: 0; background: #02070b; border: 1px solid var(--line-strong); border-radius: 16px; padding: 9px; box-shadow: var(--shadow); }
.app-shot::before { content: ""; display: block; height: 26px; border-bottom: 1px solid #20394a; background: radial-gradient(circle at 14px 13px,#ef5f72 0 4px,transparent 5px),radial-gradient(circle at 31px 13px,#f5bd67 0 4px,transparent 5px),radial-gradient(circle at 48px 13px,#7bd7b4 0 4px,transparent 5px); }
.app-shot img { display: block; width: 100%; border-radius: 0 0 8px 8px; }
.app-shot figcaption { position: absolute; left: 1rem; bottom: -1.1rem; background: var(--panel-2); color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: .35rem .75rem; font-size: .78rem; }

.hero-video { min-width: 0; margin: 0; padding: 9px; background: #02070b; border: 1px solid var(--line-strong); border-radius: 16px; box-shadow: var(--shadow); }
.hero-video-player { aspect-ratio: 16 / 9; overflow: hidden; border-radius: 8px; background: #02070b; }
.hero-video-player iframe { display: block; width: 100%; height: 100%; border: 0; }
.hero-video-player a, .hero-video-player img { display: block; width: 100%; height: 100%; }
.hero-video-player img { object-fit: contain; }
.hero-video figcaption { padding: .85rem .5rem .35rem; color: var(--muted); font-size: .86rem; }
.hero-video figcaption strong { color: var(--ink); }

.signal-strip { border-block: 1px solid var(--line); background: #071620; }
.signal-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.signal-item { padding: 1.25rem; border-right: 1px solid var(--line); }
.signal-item:last-child { border-right: 0; }
.signal-item strong { display: block; color: var(--ink); }
.signal-item span { color: var(--muted); font-size: .88rem; }

.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.card { background: linear-gradient(145deg, rgba(16,35,51,.96), rgba(8,24,35,.96)); border: 1px solid var(--line); border-radius: var(--radius); padding: 1.5rem; }
.card p { color: var(--muted); margin-bottom: 0; }
.card-mark { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 30px; border: 1px solid var(--line-strong); border-radius: 999px; color: var(--cyan); font: 700 .78rem Consolas, monospace; margin-bottom: 1.2rem; }
.card:nth-child(2) .card-mark, .card:nth-child(5) .card-mark { color: var(--amber); }
.card:nth-child(3) .card-mark, .card:nth-child(6) .card-mark { color: var(--magenta); }

.feature-band { display: grid; grid-template-columns: .82fr 1.18fr; gap: clamp(2rem, 6vw, 6rem); align-items: center; margin-bottom: clamp(4rem, 9vw, 8rem); }
.feature-band:nth-child(even) { grid-template-columns: 1.18fr .82fr; }
.feature-band:nth-child(even) .feature-copy { order: 2; }
.feature-copy p { color: var(--muted); }
.tag-list { display: flex; flex-wrap: wrap; gap: .55rem; padding: 0; list-style: none; }
.tag-list li { border: 1px solid var(--line-strong); border-radius: 999px; padding: .25rem .65rem; color: #c9dfeb; font-size: .84rem; }
.tag-list li::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); margin-right: .4rem; }
.tag-list li:nth-child(2n)::before { background: var(--amber); }
.tag-list li:nth-child(3n)::before { background: var(--magenta); }

.care-panel { display: grid; grid-template-columns: auto 1fr; gap: 1rem; background: rgba(245,189,103,.08); border: 1px solid rgba(245,189,103,.42); border-radius: 14px; padding: 1.25rem; }
.care-panel + .care-panel { margin-top: 1rem; }
.care-icon { color: var(--amber); font-weight: 900; font-size: 1.2rem; }
.care-panel h3 { margin-bottom: .4rem; font-size: 1.05rem; }
.care-panel p { margin: 0; color: #dfcfb5; }

.page-hero { padding: clamp(3.5rem, 8vw, 7rem) 0 3rem; background: linear-gradient(180deg, rgba(25,72,97,.23), transparent); border-bottom: 1px solid var(--line); }
.page-hero h1 { font-size: clamp(2.5rem, 6vw, 5rem); }
.breadcrumb { color: var(--faint); font-size: .85rem; margin-bottom: 1rem; }
.breadcrumb a { color: var(--muted); }

.tour-index { display: grid; grid-template-columns: repeat(4, 1fr); gap: .65rem; margin: 2rem 0 0; }
.tour-index a { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: .8rem; text-decoration: none; color: var(--muted); }
.tour-index a:hover { border-color: var(--cyan); color: var(--ink); }

.guide-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; }
.steps { counter-reset: step; list-style: none; padding: 0; }
.steps li { counter-increment: step; display: grid; grid-template-columns: 2.6rem 1fr; gap: .9rem; margin: 1.25rem 0; }
.steps li::before { content: counter(step, decimal-leading-zero); color: var(--cyan); font: 800 .9rem Consolas, monospace; border-top: 1px solid var(--line-strong); padding-top: .25rem; }
.steps strong { display: block; margin-bottom: .2rem; }
.steps p { margin: 0; color: var(--muted); }

.download-layout { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(290px, .75fr); gap: 1.25rem; align-items: start; }
.download-card { background: var(--panel); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: clamp(1.35rem, 3vw, 2rem); }
.download-card.featured { box-shadow: 0 0 0 1px rgba(98,213,255,.1), var(--shadow); }
.download-card h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); }
.download-meta { display: grid; grid-template-columns: repeat(2, 1fr); gap: .6rem; margin: 1.4rem 0; }
.download-meta div { background: var(--navy); border: 1px solid var(--line); padding: .75rem; border-radius: 9px; }
.download-meta span { display: block; color: var(--faint); font-size: .76rem; text-transform: uppercase; letter-spacing: .08em; }
.agreement { background: #071019; border: 1px solid var(--line); border-radius: 10px; padding: 1rem; margin: 1.25rem 0; }
.check-row { display: grid; grid-template-columns: 1.35rem 1fr; gap: .7rem; align-items: start; }
.check-row input { width: 1.15rem; height: 1.15rem; margin-top: .25rem; accent-color: var(--cyan); }
.credential { background: #050b11; border: 1px solid var(--line); border-radius: 9px; padding: .85rem 1rem; font-family: Consolas, monospace; }
.hash { overflow-wrap: anywhere; font-family: Consolas, monospace; font-size: .78rem; color: var(--muted); }
.support-card { display: grid; grid-template-columns: 1fr 128px; gap: 1rem; align-items: center; }
.support-card img { width: 128px; height: 128px; background: white; border-radius: 8px; }

.form-layout { display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 2rem; align-items: start; }
.contact-form { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: clamp(1.25rem, 3vw, 2rem); }
.field { margin-bottom: 1.2rem; }
.field label { display: block; font-weight: 700; margin-bottom: .4rem; }
.required { color: var(--amber); }
.field input, .field select, .field textarea {
  width: 100%; background: #06101a; color: var(--ink); border: 1px solid #416079; border-radius: 8px; padding: .72rem .8rem;
}
.field textarea { min-height: 210px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 3px solid rgba(98,213,255,.2); border-color: var(--cyan); }
.field [aria-invalid="true"] { border-color: var(--danger); }
.field-help, .field-error { font-size: .84rem; margin: .3rem 0 0; }
.field-help { color: var(--faint); }
.field-error { color: #ffacb7; min-height: 1.25rem; }
.character-count { text-align: right; color: var(--faint); font-size: .8rem; }
.form-status { border-radius: 9px; padding: .85rem 1rem; margin: 1rem 0; }
.form-status:empty { display: none; }
.form-status.error { background: rgba(255,128,144,.1); border: 1px solid rgba(255,128,144,.5); }
.form-status.success { background: rgba(123,215,180,.1); border: 1px solid rgba(123,215,180,.5); }
.hp-field { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.contact-aside { position: sticky; top: 100px; }

.policy { max-width: 820px; }
.policy h2 { font-size: 1.8rem; margin-top: 2.6rem; }
.policy h3 { margin-top: 1.8rem; }
.policy li + li { margin-top: .5rem; }

.faq { border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding: 1rem 0; }
.faq summary { cursor: pointer; font-weight: 700; font-size: 1.08rem; }
.faq p { color: var(--muted); max-width: 75ch; }

.site-footer { border-top: 1px solid var(--line); background: #03080d; padding: 3rem 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 2rem; }
.footer-grid h2 { font-size: 1rem; margin-bottom: .7rem; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links a { color: var(--muted); text-decoration: none; }
.footer-links a:hover { color: var(--ink); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; border-top: 1px solid var(--line); margin-top: 2rem; padding-top: 1.25rem; color: var(--faint); font-size: .82rem; }

@media (max-width: 980px) {
  .hero { min-height: auto; }
  .hero-grid, .download-layout, .form-layout { grid-template-columns: 1fr; }
  .hero-grid { gap: 3rem; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-band, .feature-band:nth-child(even) { grid-template-columns: 1fr; }
  .feature-band:nth-child(even) .feature-copy { order: initial; }
  .signal-grid { grid-template-columns: repeat(2, 1fr); }
  .signal-item:nth-child(2) { border-right: 0; }
  .signal-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .tour-index { grid-template-columns: repeat(2, 1fr); }
  .contact-aside { position: static; }
}

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .site-nav { display: none; position: absolute; left: 1rem; right: 1rem; top: 68px; background: #07131e; border: 1px solid var(--line); border-radius: 12px; padding: .6rem; box-shadow: var(--shadow); }
  .site-nav.open { display: grid; }
  .site-nav a { padding: .7rem .8rem; }
  .nav-download { margin-left: 0; }
  .section-heading { display: block; }
  .feature-grid, .guide-grid, .footer-grid { grid-template-columns: 1fr; }
  .app-shot { border-radius: 10px; padding: 5px; }
  .support-card { grid-template-columns: 1fr; }
  .footer-bottom { display: block; }
}

@media (max-width: 480px) {
  .container, .nav-wrap { width: min(100% - 1.25rem, var(--max)); }
  h1 { font-size: clamp(2.25rem, 13vw, 3.4rem); }
  .signal-grid, .download-meta, .tour-index { grid-template-columns: 1fr; }
  .signal-item { border-right: 0; border-bottom: 1px solid var(--line); }
  .signal-item:last-child { border-bottom: 0; }
  .hero-actions .button, .action-row .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}