:root {
  --bg: #ffffff;
  --bg-alt: #f5f7fb;
  --fg: #0f172a;
  --muted: #5b6477;
  --line: #e3e8f0;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --accent-soft: #e8f0fe;
  --ok: #15803d;
  --ok-soft: #e7f6ec;
  --warn: #b45309;
  --warn-soft: #fdf3e2;
  --danger: #b91c1c;
  --panel: #ffffff;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .06);
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1020;
    --bg-alt: #10172b;
    --fg: #e6e9f2;
    --muted: #97a0b5;
    --line: #222b42;
    --accent: #4f8cff;
    --accent-soft: #16244a;
    --ok: #4ade80;
    --ok-soft: #12301f;
    --warn: #fbbf24;
    --warn-soft: #3a2a0c;
    --danger: #f87171;
    --panel: #121a30;
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font: .9em ui-monospace, SFMono-Regular, Consolas, monospace; background: var(--bg-alt); border: 1px solid var(--line); padding: 1px 5px; border-radius: 5px; }
h1, h2, h3 { line-height: 1.2; margin: 0 0 .5em; letter-spacing: -.01em; }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); letter-spacing: -.025em; }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.1rem; }
p { margin: 0 0 1em; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.narrow { max-width: 760px; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }
.center { text-align: center; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.nav-in { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; color: var(--fg); }
.brand:hover { text-decoration: none; }
.nav nav { display: flex; align-items: center; gap: 22px; }
.nav nav a:not(.btn) { color: var(--muted); font-size: .95rem; }
.nav nav a:not(.btn):hover { color: var(--fg); text-decoration: none; }
@media (max-width: 640px) { .nav nav a[href^="/#"] { display: none; } .nav nav { gap: 14px; } }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  background: var(--accent); color: var(--accent-ink); border: 1px solid var(--accent);
  padding: 10px 18px; border-radius: 10px; font: inherit; font-weight: 600; cursor: pointer;
  transition: transform .08s ease, filter .15s ease;
}
.btn:hover { filter: brightness(1.07); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn svg { width: 18px; height: 18px; fill: currentColor; }
.btn-ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.btn-ghost:hover { background: var(--bg-alt); filter: none; }
.btn-sm { padding: 6px 12px; font-size: .9rem; border-radius: 8px; }
.btn-lg { padding: 13px 22px; font-size: 1.02rem; }
.btn-block { width: 100%; }
.btn.disabled { opacity: .45; pointer-events: none; }
.btn.danger { color: var(--danger); }

/* hero */
.hero { padding: 72px 0 64px; background: radial-gradient(1200px 400px at 80% -10%, var(--accent-soft), transparent 70%); }
.hero-in { display: grid; grid-template-columns: 1.1fr .9fr; gap: 56px; align-items: center; }
.eyebrow { color: var(--accent); font-weight: 600; font-size: .9rem; text-transform: uppercase; letter-spacing: .08em; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 36em; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin: 28px 0 14px; }
.small-cta { margin: 18px 0 0; }
@media (max-width: 860px) { .hero-in { grid-template-columns: 1fr; } .hero-art { display: none; } }

.window { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); overflow: hidden; }
.win-bar { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-bottom: 1px solid var(--line); background: var(--bg-alt); }
.win-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--line); }
.win-bar span { margin-left: 8px; font-size: .85rem; color: var(--muted); font-weight: 600; }
.win-body { padding: 10px 14px 16px; }
.row { display: flex; align-items: center; gap: 12px; padding: 12px 4px; border-bottom: 1px solid var(--line); font-weight: 500; }
.row .tag { margin-left: auto; }
.devices { display: flex; gap: 8px; flex-wrap: wrap; padding-top: 14px; }
.dev { font-size: .8rem; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 10px; }
.ico { width: 22px; height: 18px; border-radius: 4px; flex: none; }
.ico.folder { background: linear-gradient(180deg, #fbbf24, #f59e0b); clip-path: polygon(0 12%, 38% 12%, 46% 0, 100% 0, 100% 100%, 0 100%); }
.ico.img { width: 18px; height: 20px; background: linear-gradient(180deg, #60a5fa, #2563eb); border-radius: 3px; }

/* tags */
.tag { display: inline-block; font-size: .78rem; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--bg-alt); color: var(--muted); border: 1px solid var(--line); }
.tag.ok { background: var(--ok-soft); color: var(--ok); border-color: transparent; }
.tag.busy { background: var(--accent-soft); color: var(--accent); border-color: transparent; }
.tag.warn { background: var(--warn-soft); color: var(--warn); border-color: transparent; }

/* sections */
.section { padding: 72px 0; }
.section.alt { background: var(--bg-alt); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; }
.step b { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); margin-bottom: 12px; }
.step p { color: var(--muted); }
.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 28px; }
.cards.three { grid-template-columns: repeat(3, 1fr); }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.card p { color: var(--muted); margin: 0; }
.ticks { list-style: none; padding: 0; margin: 0 0 20px; }
.ticks li { position: relative; padding-left: 26px; margin: 8px 0; color: var(--muted); }
.ticks li::before { content: ""; position: absolute; left: 2px; top: .45em; width: 12px; height: 7px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
@media (max-width: 860px) { .steps, .cards, .cards.three { grid-template-columns: 1fr; } }
.split { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.split p { color: var(--muted); }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }
.files { display: grid; gap: 10px; }
.file { display: flex; align-items: center; gap: 12px; padding: 14px 16px; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); font-weight: 500; }
.file.new { border-color: var(--accent); }
.file .tag { margin-left: auto; }
.faq details { border-bottom: 1px solid var(--line); padding: 16px 0; }
.faq summary { cursor: pointer; font-weight: 600; }
.faq details p { color: var(--muted); margin: 10px 0 0; }

/* forms and panels */
.auth { min-height: calc(100vh - 64px - 70px); display: grid; place-items: center; padding: 40px 20px; }
.panel { width: 100%; max-width: 400px; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.panel h1 { font-size: 1.6rem; }
.panel.wide { max-width: none; margin-bottom: 22px; }
.panel-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.panel-head h2 { font-size: 1.2rem; margin: 0; }
label { display: block; font-size: .9rem; font-weight: 600; margin: 0 0 14px; }
input { display: block; width: 100%; margin-top: 6px; padding: 10px 12px; font: inherit; color: var(--fg); background: var(--bg); border: 1px solid var(--line); border-radius: 9px; }
input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); border-color: var(--accent); }
.hint { display: block; font-weight: 400; color: var(--muted); font-size: .8rem; margin-top: 4px; }
.alert { background: color-mix(in srgb, var(--danger) 12%, transparent); color: var(--danger); padding: 10px 14px; border-radius: 9px; font-size: .92rem; }
.notice { background: var(--ok-soft); color: var(--ok); padding: 10px 14px; border-radius: 9px; font-size: .92rem; }
.account { padding-top: 48px; }
.acc-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 20px; }
.acc-head h1 { font-size: 1.9rem; margin: 0; }
.facts { display: grid; grid-template-columns: 140px 1fr; gap: 8px 16px; margin: 6px 0 18px; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; font-weight: 500; word-break: break-word; }
.boxform { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; margin-top: 14px; }
.boxform label:first-child { grid-column: 1 / -1; }
.boxform .btn { grid-column: 1 / -1; justify-self: start; }
@media (max-width: 560px) { .boxform { grid-template-columns: 1fr; } .facts { grid-template-columns: 1fr; } }
.more { margin: 0 0 14px; }
.more summary { cursor: pointer; color: var(--accent); font-size: .92rem; }
form.inline { display: inline; }
.devlist { list-style: none; margin: 0; padding: 0; }
.devlist li { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; border-bottom: 1px solid var(--line); }
.devlist li:last-child { border-bottom: 0; }

/* footer */
.foot { border-top: 1px solid var(--line); padding: 22px 0; font-size: .875rem; }
.foot-in { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: var(--muted); }