:root {
  --accent: #2f6f55; --accent-dark: #23503f; --accent-deep: #173a2d; --accent-light: #e4f0ea; --accent-soft: #f1f7f4;
  --ink: #1f2430; --muted: #5d6573; --line: #e2e6ec; --bg: #ffffff; --card: #ffffff; --green: #1b7f3b;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --accent: #7fc8a5; --accent-dark: #c3e6d4; --accent-deep: #e3f3ea; --accent-light: #1f3a2f; --accent-soft: #17241e;
    --ink: #e7e9ee; --muted: #a3aab6; --line: #2c3341; --bg: #12151b; --card: #181c24; --green: #5cc982; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --accent: #7fc8a5; --accent-dark: #c3e6d4; --accent-deep: #e3f3ea; --accent-light: #1f3a2f; --accent-soft: #17241e;
  --ink: #e7e9ee; --muted: #a3aab6; --line: #2c3341; --bg: #12151b; --card: #181c24; --green: #5cc982; color-scheme: dark;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font: 16px/1.6 "Segoe UI", system-ui, -apple-system, Roboto, "Noto Sans", Arial, sans-serif; color: var(--ink); background: var(--bg); }
a { color: var(--accent); }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 20px; }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; gap: 22px; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); font-weight: 700; font-size: 18px; }
.brand img { width: 34px; height: 34px; border-radius: 8px; }
.top nav { display: flex; gap: 22px; margin-left: auto; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.top nav a:hover { color: var(--ink); }
.lang { position: relative; }
.lang select { appearance: none; border: 1px solid var(--line); background: var(--card); color: var(--ink); border-radius: 8px; padding: 6px 28px 6px 10px; font: inherit; font-size: 14px; cursor: pointer; }
.lang::after { content: "▾"; position: absolute; right: 10px; top: 50%; transform: translateY(-50%); pointer-events: none; color: var(--muted); font-size: 12px; }
.btn { display: inline-flex; align-items: center; gap: 10px; border-radius: 12px; padding: 14px 22px; font-weight: 600; text-decoration: none; font-size: 16px; transition: transform .12s, box-shadow .12s, background .12s; border: 1px solid transparent; }
.btn:hover { transform: translateY(-1px); }
.btn svg { width: 20px; height: 20px; flex: none; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 22px rgba(47,111,85,.28); }
.btn-primary:hover { background: #28614a; }
.btn-ghost { background: var(--card); color: var(--ink); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); }
.top .btn { padding: 8px 14px; font-size: 14px; border-radius: 10px; box-shadow: none; }

/* hero */
.hero { padding: 64px 0 40px; background: radial-gradient(1200px 500px at 70% -10%, var(--accent-light), transparent 60%); }
.hero .hero-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 48px; align-items: center; }
.badge { display: inline-block; background: var(--accent-light); color: var(--accent-dark); border-radius: 999px; padding: 6px 12px; font-size: 13px; font-weight: 600; }
.hero h1 { font-size: clamp(34px, 4.6vw, 54px); line-height: 1.08; margin: 16px 0 16px; letter-spacing: -0.02em; color: var(--accent-deep); }
.hero p.sub { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
.ctas { display: flex; flex-wrap: wrap; gap: 14px; }
.cta { display: flex; flex-direction: column; gap: 6px; }
.cta small { color: var(--muted); font-size: 13px; padding-left: 4px; }
.trust { list-style: none; padding: 0; margin: 28px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px 18px; color: var(--muted); font-size: 15px; }
.trust li::before { content: "✓"; color: var(--green); font-weight: 700; margin-right: 8px; }
.window { border-radius: 12px; overflow: hidden; box-shadow: 0 24px 60px rgba(20,30,50,.22), 0 2px 6px rgba(20,30,50,.12); border: 1px solid var(--line); background: #fff; }
.window .bar { height: 30px; background: #23503f; display: flex; align-items: center; gap: 7px; padding: 0 12px; }
.window .bar i { width: 10px; height: 10px; border-radius: 50%; background: #ffffff55; }

/* formats strip */
.formats { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; padding: 26px 0 8px; }
.formats span { border: 1px solid var(--line); border-radius: 999px; padding: 5px 14px; font-size: 14px; color: var(--muted); background: var(--card); font-weight: 600; letter-spacing: .02em; }

/* sections */
section { padding: 72px 0; }
section.alt { background: var(--accent-soft); }
h2 { font-size: clamp(28px, 3.2vw, 38px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -0.01em; color: var(--accent-deep); text-align: center; }
.lead { text-align: center; color: var(--muted); font-size: 18px; margin: 0 auto 40px; max-width: 680px; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; }
.card .ic { width: 44px; height: 44px; border-radius: 12px; background: var(--accent-light); color: var(--accent); display: grid; place-items: center; margin-bottom: 14px; }
.card .ic svg { width: 24px; height: 24px; }
.card h3 { margin: 0 0 8px; font-size: 18px; }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.shots { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.shots figure { margin: 0; }
.shots figcaption { text-align: center; color: var(--muted); font-size: 15px; margin-top: 12px; }

.online { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.online h2, .online .lead { text-align: left; margin-left: 0; }
.checks { list-style: none; padding: 0; margin: 0 0 28px; }
.checks li { padding: 6px 0 6px 30px; position: relative; }
.checks li::before { content: ""; position: absolute; left: 0; top: 11px; width: 18px; height: 18px; border-radius: 50%; background: var(--accent-light); box-shadow: inset 0 0 0 5px var(--accent); }
.mock img { width: 100%; }
.mock { border-radius: 14px; border: 1px solid var(--line); background: var(--card); overflow: hidden; box-shadow: 0 18px 44px rgba(20,30,50,.14); }
.mock .url { display: flex; gap: 8px; align-items: center; padding: 10px 14px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.mock .url span { flex: 1; background: var(--accent-soft); border-radius: 8px; padding: 5px 10px; }
.mock .sheet { margin: 18px auto; width: 78%; aspect-ratio: 1 / 1.1; background: #fff; box-shadow: 0 2px 10px rgba(0,0,0,.08); padding: 22px; }
.mock .sheet b { display: block; height: 14px; width: 55%; background: #173a2d; border-radius: 3px; margin-bottom: 14px; }
.mock .sheet i { display: block; height: 8px; background: #d3e0da; border-radius: 3px; margin: 8px 0; }
.mock .sheet i:nth-child(3n) { width: 80%; }

table.cmp { width: 100%; max-width: 820px; margin: 0 auto; border-collapse: collapse; background: var(--card); border-radius: 14px; overflow: hidden; border: 1px solid var(--line); }
table.cmp th, table.cmp td { padding: 14px 18px; border-bottom: 1px solid var(--line); text-align: center; }
table.cmp th:first-child, table.cmp td:first-child { text-align: left; }
table.cmp thead th { background: var(--accent-light); color: var(--accent-deep); font-size: 15px; }
table.cmp tr:last-child td { border-bottom: 0; }
.yes { color: var(--green); font-weight: 700; }
.no { color: var(--muted); }

ol.steps { counter-reset: s; list-style: none; padding: 0; max-width: 760px; margin: 0 auto; }
ol.steps li { counter-increment: s; position: relative; padding: 14px 0 14px 60px; font-size: 17px; }
ol.steps li::before { content: counter(s); position: absolute; left: 0; top: 10px; width: 40px; height: 40px; border-radius: 50%; background: var(--accent); color: #fff; display: grid; place-items: center; font-weight: 700; }

.faq { max-width: 820px; margin: 0 auto; }
.faq details { border: 1px solid var(--line); border-radius: 12px; padding: 4px 18px; margin-bottom: 12px; background: var(--card); }
.faq summary { cursor: pointer; font-weight: 600; padding: 12px 0; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::after { content: "+"; color: var(--accent); font-size: 22px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 0 0 14px; color: var(--muted); }

.download { text-align: center; }
.download .box { max-width: 720px; margin: 0 auto; background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 40px 28px; box-shadow: 0 18px 44px rgba(20,30,50,.08); }
.download img.icon { width: 88px; height: 88px; border-radius: 20px; margin: 0 auto 16px; }
.download .meta { color: var(--muted); margin: 8px 0 24px; }
.sha { margin-top: 22px; font-size: 12px; color: var(--muted); word-break: break-all; }
.sha code { background: var(--accent-soft); padding: 2px 6px; border-radius: 6px; }

footer { border-top: 1px solid var(--line); padding: 32px 0 40px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 14px 26px; align-items: center; }
footer a { color: var(--muted); }
footer .tm { flex-basis: 100%; font-size: 12px; }
.langs { flex-basis: 100%; display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 13px; }

.doc-page { max-width: 760px; margin: 0 auto; padding: 56px 20px; }
.doc-page h1 { color: var(--accent-deep); }

@media (max-width: 920px) {
  .hero .hero-grid, .online { grid-template-columns: 1fr; }
  .grid3 { grid-template-columns: 1fr 1fr; }
  .top nav { display: none; }
  .top .wrap { gap: 12px; }
  .lang { margin-left: auto; }
}
@media (max-width: 600px) {
  .grid3, .shots { grid-template-columns: 1fr; }
  .trust { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
  .hero { padding-top: 36px; }
  .top .btn { display: none; }
  .btn { width: 100%; justify-content: center; }
  .cta { width: 100%; }
  table.cmp th, table.cmp td { padding: 10px 8px; font-size: 14px; }
}

/* ===== polish layer (2026-10-30) ===== */
:root { --grad: linear-gradient(135deg, #2f8f62 0%, #1f9c84 100%); --glow: rgba(31,156,132,.35); }
body { background: var(--bg); }
.top { border-bottom-color: transparent; box-shadow: 0 1px 0 var(--line), 0 8px 30px rgba(20,30,50,.04); }
.brand img { box-shadow: 0 4px 12px rgba(35,80,63,.35); }
.top nav a { position: relative; padding: 4px 0; font-weight: 500; }
.top nav a::after { content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 2px; border-radius: 2px; background: var(--grad); transform: scaleX(0); transition: transform .2s; }
.top nav a:hover::after { transform: scaleX(1); }
.btn-primary { background: var(--grad); box-shadow: 0 10px 28px var(--glow); }
.btn-primary:hover { background: var(--grad); filter: brightness(1.08); box-shadow: 0 14px 34px var(--glow); }
.btn-ghost { backdrop-filter: blur(6px); }

.hero { position: relative; overflow: hidden; padding: 84px 0 56px;
  background: radial-gradient(900px 480px at 85% -10%, rgba(31,156,132,.20), transparent 60%),
              radial-gradient(700px 420px at 0% 10%, rgba(47,143,98,.18), transparent 60%),
              linear-gradient(180deg, var(--accent-soft), var(--bg)); }
.hero::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(var(--line) 1px, transparent 1px); background-size: 26px 26px; opacity: .55; mask-image: linear-gradient(180deg, #000, transparent 75%); pointer-events: none; }
.hero .wrap { position: relative; }
.badge { background: var(--card); border: 1px solid var(--line); box-shadow: 0 4px 14px rgba(20,30,50,.06); padding: 7px 14px 7px 28px; position: relative; }
.badge::before { content: ""; position: absolute; left: 12px; top: 50%; width: 8px; height: 8px; margin-top: -4px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px color-mix(in srgb, var(--green) 25%, transparent); }
.hero h1 { font-size: clamp(38px, 5.2vw, 64px); line-height: 1.04; letter-spacing: -0.035em; font-weight: 800;
  background: linear-gradient(120deg, var(--accent-deep) 20%, #1f9c84 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .window { transform: perspective(1400px) rotateY(-6deg) rotateX(3deg); transition: transform .4s; box-shadow: 0 40px 80px rgba(23,58,45,.30), 0 0 0 1px rgba(255,255,255,.4) inset; }
.hero .window:hover { transform: perspective(1400px) rotateY(-1deg) rotateX(0); }
.window { border-radius: 14px; }
.window .bar { background: linear-gradient(180deg, #2c6b52, #1f4c3b); }
.window .bar i:nth-child(1) { background: #ff6b6b; } .window .bar i:nth-child(2) { background: #ffd166; } .window .bar i:nth-child(3) { background: #5cc982; }
.trust li::before { content: "✓"; display: inline-grid; place-items: center; width: 18px; height: 18px; border-radius: 50%; background: color-mix(in srgb, var(--green) 16%, transparent); font-size: 11px; }

.formats span { transition: all .15s; box-shadow: 0 2px 6px rgba(20,30,50,.04); }
.formats span:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-2px); }

section { padding: 96px 0; }
section.alt { background: linear-gradient(180deg, var(--accent-soft), color-mix(in srgb, var(--accent-soft) 60%, var(--bg))); }
h2 { font-size: clamp(30px, 3.6vw, 46px); letter-spacing: -0.03em; font-weight: 800; }
h2::after { content: ""; display: block; width: 48px; height: 4px; border-radius: 4px; background: var(--grad); margin: 16px auto 0; }
.online h2::after { margin-left: 0; }
.lead { font-size: 19px; margin-top: 16px; }

.card { border-radius: 20px; padding: 28px; position: relative; overflow: hidden; transition: transform .2s, box-shadow .2s, border-color .2s; box-shadow: 0 1px 2px rgba(20,30,50,.04); }
.card::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--grad); opacity: 0; transition: opacity .2s; }
.card:hover { transform: translateY(-6px); box-shadow: 0 22px 48px rgba(23,58,45,.14); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.card:hover::before { opacity: 1; }
.card .ic { width: 52px; height: 52px; border-radius: 16px; background: var(--grad); color: #fff; box-shadow: 0 10px 22px var(--glow); }
.card h3 { font-size: 19px; }

.shots figure .window { transition: transform .25s, box-shadow .25s; box-shadow: 0 24px 54px rgba(20,30,50,.20); }
.shots figure:hover .window { transform: translateY(-6px) scale(1.01); }
.mock { border-radius: 18px; box-shadow: 0 30px 64px rgba(23,58,45,.20); transition: transform .25s; }
.mock:hover { transform: translateY(-5px); }
.checks li::before { background: var(--grad); box-shadow: none; }
.checks li::after { content: "✓"; position: absolute; left: 4px; top: 8px; font-size: 11px; font-weight: 800; color: #fff; }

table.cmp { border-radius: 18px; box-shadow: 0 16px 40px rgba(20,30,50,.08); }
table.cmp thead th { background: var(--grad); color: #fff; padding: 18px; }
table.cmp tbody tr:hover td { background: var(--accent-soft); }

ol.steps li { padding-left: 68px; }
ol.steps li::before { width: 44px; height: 44px; background: var(--grad); box-shadow: 0 8px 20px var(--glow); }
ol.steps li:not(:last-child)::after { content: ""; position: absolute; left: 21px; top: 56px; bottom: -6px; width: 2px; background: linear-gradient(var(--accent), transparent); opacity: .35; }

.faq details { border-radius: 16px; transition: box-shadow .2s, border-color .2s; }
.faq details:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.faq details[open] { box-shadow: 0 12px 30px rgba(20,30,50,.08); border-color: var(--accent); }
.faq summary::after { display: grid; place-items: center; flex: none; width: 28px; height: 28px; border-radius: 50%; background: var(--accent-light); font-size: 18px; }

.download { position: relative; }
.download .box { position: relative; overflow: hidden; border: 0; border-radius: 28px; padding: 56px 32px; color: #fff;
  background: radial-gradient(500px 260px at 90% 0%, rgba(31,156,132,.55), transparent 70%), linear-gradient(135deg, #163a2c, #23604a); box-shadow: 0 34px 80px rgba(23,58,45,.40); }
.download .box h2 { color: #fff; }
.download .box .meta, .download .box .sha, .download .box a:not(.btn) { color: rgba(255,255,255,.75); }
.download .box .sha code { background: rgba(255,255,255,.12); color: #fff; }
.download .box .btn-primary { background: #fff; color: #173a2d; box-shadow: 0 14px 34px rgba(0,0,0,.30); }
.download img.icon { border-radius: 24px; box-shadow: 0 16px 36px rgba(0,0,0,.35); }

footer { background: var(--accent-soft); }
@media (max-width: 600px) { .hero .window { transform: none; } section { padding: 60px 0; } .hero { padding-top: 40px; } }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } .hero .window { transform: none; } }