:root {
  --bg: #f6faf8;
  --surface: #ffffff;
  --ink: #12261f;
  --ink2: #4d6359;
  --line: #dbe7e1;
  --mint: #18b07f;
  --mint-d: #0f8f66;
  --mint-l: #e3f7ef;
  --neg: #d4473b;
  --shadow: 0 10px 30px rgba(16, 60, 44, .08);
  --r: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1613;
    --surface: #15211c;
    --ink: #e6f2ec;
    --ink2: #9ab3a7;
    --line: #26372f;
    --mint: #3ddc97;
    --mint-d: #2fc184;
    --mint-l: #173328;
    --neg: #ff7b6e;
    --shadow: 0 10px 30px rgba(0, 0, 0, .35);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--mint-d); }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 16px; }
.muted { color: var(--ink2); }
.small { font-size: .9rem; }
.center { text-align: center; }
[hidden] { display: none !important; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4em;
  border: 1px solid var(--mint); background: var(--mint); color: #fff;
  font: inherit; font-weight: 600; padding: .55em 1.1em; border-radius: 10px;
  cursor: pointer; text-decoration: none; transition: background .15s, transform .05s;
}
.btn:hover { background: var(--mint-d); border-color: var(--mint-d); }
.btn:active { transform: translateY(1px); }
.btn.ghost { background: transparent; color: var(--mint-d); }
.btn.ghost:hover { background: var(--mint-l); }
.btn.big { padding: .8em 1.5em; font-size: 1.05rem; }
.btn.wide { width: 100%; }
.btn[disabled] { opacity: .6; cursor: progress; }
.link { background: none; border: 0; color: var(--mint-d); font: inherit; cursor: pointer; padding: 0; text-decoration: underline; }

/* header */
.top { 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(--line); }
.top-in { display: flex; align-items: center; gap: 24px; height: 64px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-size: 1.25rem; }
.logo b { color: var(--mint); }
.top-nav { display: flex; gap: 20px; margin-right: auto; }
.top-nav a { color: var(--ink2); text-decoration: none; }
.top-nav a:hover { color: var(--ink); }
.top-auth { display: flex; gap: 8px; align-items: center; }
.who { color: var(--ink2); text-decoration: none; max-width: 220px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.notice { margin-top: 16px; padding: 12px 16px; border-radius: 10px; background: var(--mint-l); border: 1px solid var(--mint); }
.notice.err { background: color-mix(in srgb, var(--neg) 12%, var(--surface)); border-color: var(--neg); }

/* hero */
.hero { padding: 72px 0 56px; }
.hero-in { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); letter-spacing: -.02em; }
.hero h1 span { color: var(--mint); }
.lead { font-size: 1.12rem; color: var(--ink2); max-width: 36em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 12px; }
.hint { color: var(--ink2); font-size: .92rem; }

.card-mock { background: var(--surface); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); padding: 18px 20px 20px; transform: rotate(-1.5deg); }
.mock-head { display: flex; gap: 6px; margin-bottom: 14px; }
.mock-head span { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.mock-row { display: flex; justify-content: space-between; padding: 9px 0; border-bottom: 1px solid var(--line); }
.mock-row i { font-style: normal; color: var(--ink2); }
.mock-row.strong i { color: var(--ink); font-weight: 600; }
.mock-row.neg b { color: var(--neg); }
.mock-bars { display: flex; align-items: flex-end; gap: 10px; height: 110px; margin-top: 18px; }
.mock-bars span { flex: 1; border-radius: 6px 6px 2px 2px; background: linear-gradient(var(--mint), var(--mint-d)); }
.mock-bars span:nth-child(1) { height: 40%; }
.mock-bars span:nth-child(2) { height: 65%; }
.mock-bars span:nth-child(3) { height: 52%; }
.mock-bars span:nth-child(4) { height: 80%; }
.mock-bars span:nth-child(5) { height: 58%; }
.mock-bars span:nth-child(6) { height: 90%; }

/* features */
.features { padding: 40px 16px 64px; }
.grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 24px; }
.feat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.feat p { color: var(--ink2); margin: 0; }
.ic { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; background: var(--mint-l); color: var(--mint-d); font-size: 1.3rem; font-weight: 700; margin-bottom: 14px; }

/* download */
.download { background: var(--surface); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 56px 0; }
.download h2 { text-align: center; }
.dl-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 340px)); justify-content: center; gap: 20px; margin-top: 24px; }
.dl { border: 1px solid var(--line); border-radius: var(--r); padding: 26px; text-align: center; background: var(--bg); }
.dl p { color: var(--ink2); min-height: 3em; }
.dl-meta { font-size: .82rem; color: var(--ink2); min-height: 0 !important; margin: 12px 0 0; overflow-wrap: anywhere; }
.dl-meta code { font-size: .75rem; }
.dl-ic { font-size: 2.2rem; color: var(--mint); line-height: 1; margin-bottom: 10px; }

/* account */
.account { padding: 56px 16px; }
.acc-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 20px; }
.panel { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 22px; }
.files { list-style: none; margin: 12px 0 0; padding: 0; }
.files li { display: flex; align-items: center; gap: 12px; padding: 10px 0; border-top: 1px solid var(--line); }
.files li .dl-link { font-size: .88rem; color: var(--ink2); }
.files li .meta { margin-left: auto; color: var(--ink2); font-size: .88rem; white-space: nowrap; }
.files li.empty { color: var(--ink2); }
.danger { margin-top: 20px; border-top: 1px solid var(--line); padding-top: 14px; }
.danger summary { cursor: pointer; color: var(--neg); }
.danger-btn { background: var(--neg); border-color: var(--neg); }
.danger-btn:hover { background: var(--neg); filter: brightness(.92); }

/* forms */
.form { display: flex; flex-direction: column; gap: 12px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: .92rem; color: var(--ink2); }
.form label small { color: var(--ink2); font-weight: 400; }
.form input { font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: .6em .8em; }
.form input:focus { outline: 2px solid var(--mint); outline-offset: 0; border-color: var(--mint); }
.msg { margin: 0; min-height: 1.3em; font-size: .92rem; }
.msg.ok { color: var(--mint-d); }
.msg.err { color: var(--neg); }

/* dialog */
dialog { border: 1px solid var(--line); border-radius: 18px; padding: 28px; width: min(420px, calc(100vw - 32px)); background: var(--surface); color: var(--ink); box-shadow: var(--shadow); }
dialog::backdrop { background: rgba(8, 24, 18, .45); }
dialog .x { position: absolute; top: 10px; right: 12px; margin: 0; }
dialog .x button { background: none; border: 0; font-size: 1.6rem; line-height: 1; color: var(--ink2); cursor: pointer; }
.tabs { display: flex; gap: 4px; background: var(--bg); border-radius: 10px; padding: 4px; margin-bottom: 18px; }
.tabs button { flex: 1; border: 0; background: none; font: inherit; padding: .45em; border-radius: 8px; cursor: pointer; color: var(--ink2); }
.tabs button[aria-selected="true"] { background: var(--surface); color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px rgba(0,0,0,.08); }

.foot { padding: 28px 0; color: var(--ink2); font-size: .9rem; }
.foot-in { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.foot a { color: var(--ink2); }

@media (max-width: 900px) {
  .hero-in { grid-template-columns: 1fr; }
  .hero-art { max-width: 420px; }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .acc-grid { grid-template-columns: 1fr; }
}
@media (max-width: 600px) {
  .top-nav { display: none; }
  .top-in { gap: 12px; justify-content: space-between; }
  .logo span { display: none; }
  .hero { padding: 40px 0 32px; }
  .grid, .dl-grid { grid-template-columns: 1fr; }
  .btn.big { width: 100%; }
}