/* SpareDisk website. Plain CSS, no framework, no build step. */

:root {
  --bg: #ffffff;
  --bg-2: #f5f5f7;
  --text: #1d1d1f;
  --text-2: #4b4b50;
  --text-3: #86868b;
  --line: rgba(0, 0, 0, 0.09);
  --accent: #2f6fdb;
  --accent-text: #ffffff;
  --card: #ffffff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.06), 0 12px 40px -12px rgba(0, 0, 0, 0.18);
  --radius: 12px;
  --measure: 62ch;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101012;
    --bg-2: #18181b;
    --text: #f2f2f4;
    --text-2: #b9b9c0;
    --text-3: #8a8a92;
    --line: rgba(255, 255, 255, 0.10);
    --accent: #5b93f0;
    --card: #18181b;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 48px -12px rgba(0, 0, 0, 0.7);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-feature-settings: "kern", "liga";
  -webkit-font-smoothing: antialiased;
}

img, picture { display: block; max-width: 100%; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.skip {
  position: absolute; left: 16px; top: -48px; padding: 8px 12px;
  background: var(--accent); color: var(--accent-text); border-radius: 8px; z-index: 100;
}
.skip:focus { top: 12px; }

.wrap { width: min(1120px, 100% - 48px); margin-inline: auto; }
@media (max-width: 640px) { .wrap { width: min(1120px, 100% - 32px); } }

/* Type */
h1, h2, h3 { margin: 0; letter-spacing: -0.015em; line-height: 1.12; text-wrap: balance; }
h1 { font-size: clamp(2.25rem, 1.4rem + 3.6vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.5rem); font-weight: 700; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { margin: 0; }
.lede { font-size: clamp(1.1rem, 1rem + 0.5vw, 1.35rem); color: var(--text-2); max-width: var(--measure); text-wrap: pretty; }
.muted { color: var(--text-3); }
.small { font-size: 0.9375rem; }
.eyebrow {
  display: inline-block; font-size: 0.8125rem; font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 14px;
}
.num { font-variant-numeric: tabular-nums; }

/* Nav */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(20px); backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap { display: flex; align-items: center; gap: 28px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; font-size: 1.0625rem; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; border-radius: 7px; }
.nav-links { display: flex; gap: 24px; margin-left: auto; align-items: center; }
.nav-links a { color: var(--text-2); font-size: 0.9375rem; font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }
.nav-links .btn-primary, .nav-links .btn-primary:hover { color: var(--accent-text); }
.nav-toggle {
  display: none; margin-left: auto; width: 40px; height: 40px; border: 0; background: none; color: var(--text);
  border-radius: 8px; cursor: pointer;
}
@media (max-width: 760px) {
  .nav-toggle { display: inline-grid; place-items: center; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 60px; padding: 8px 24px 20px;
    flex-direction: column; align-items: flex-start; gap: 6px; background: var(--bg); border-bottom: 1px solid var(--line);
  }
  .nav-links a { padding: 10px 0; font-size: 1.0625rem; }
  .nav.open .nav-links { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: 10px;
  font-weight: 600; font-size: 0.9875rem; border: 1px solid transparent; white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: var(--accent-text); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-secondary { background: var(--bg-2); color: var(--text); border-color: var(--line); }
.btn-secondary:hover { background: color-mix(in srgb, var(--bg-2) 80%, var(--text) 6%); }
.btn-sm { height: 36px; padding: 0 14px; font-size: 0.9rem; }

/* Hero */
.hero { padding: clamp(56px, 6vw, 96px) 0 0; }
.hero .wrap { display: grid; gap: 28px; justify-items: start; }
.hero h1 { max-width: 16ch; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.hero .req { color: var(--text-3); font-size: 0.9rem; }
.hero .shot { margin-top: 20px; width: 100%; }

.shot {
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: var(--shadow);
  background: var(--bg-2);
}
.shot img { width: 100%; height: auto; }

/* Facts strip */
.facts { padding: 40px 0; }
.facts .wrap { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 28px 0; }
.fact strong { display: block; font-size: 1.6rem; font-weight: 700; letter-spacing: -0.01em; }
.fact span { color: var(--text-2); font-size: 0.95rem; }
@media (max-width: 720px) { .facts .wrap { grid-template-columns: 1fr; gap: 18px; } }

/* Feature rows */
.section { padding: clamp(56px, 7vw, 112px) 0; }
.section + .section { padding-top: 0; }
.section-head { max-width: 720px; margin-bottom: 40px; }
.section-head p { margin-top: 14px; }

.feature { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(28px, 4vw, 64px); align-items: center; padding: 36px 0; }
.feature.flip { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.feature.flip .copy { order: 2; }
.feature .copy p { margin-top: 12px; color: var(--text-2); max-width: 48ch; text-wrap: pretty; }
.feature .copy ul { margin: 16px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.feature .copy li { padding-left: 22px; position: relative; color: var(--text-2); }
.feature .copy li::before { content: ""; position: absolute; left: 0; top: 0.62em; width: 10px; height: 10px; border-radius: 3px; background: var(--accent); opacity: 0.85; }
@media (max-width: 860px) {
  .feature, .feature.flip { grid-template-columns: 1fr; }
  .feature.flip .copy { order: 0; }
}

/* Trust */
.trust { background: var(--bg-2); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--text-2); }
@media (max-width: 860px) { .grid-3 { grid-template-columns: 1fr; } }

/* Compare table */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; min-width: 640px; font-size: 0.95rem; }
th, td { text-align: left; padding: 14px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; background: var(--bg-2); }
tr:last-child td { border-bottom: 0; }
td.yes { color: var(--text); font-weight: 500; }
td.no { color: var(--text-3); }
th:first-child, td:first-child { width: 34%; }

/* FAQ */
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; padding: 18px 0; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--text-3); font-weight: 400; font-size: 1.3rem; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq .answer { padding: 0 0 20px; color: var(--text-2); max-width: var(--measure); }

/* Download */
.download { text-align: center; }
.download .wrap { display: grid; justify-items: center; gap: 18px; }
.download h2 { max-width: 20ch; }
.download .actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* Footer */
footer { border-top: 1px solid var(--line); padding: 32px 0 48px; color: var(--text-3); font-size: 0.9rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 12px 28px; align-items: center; justify-content: space-between; }
footer nav { display: flex; gap: 20px; flex-wrap: wrap; }
footer a { color: var(--text-2); }

/* Doc pages (help, privacy) */
.doc { padding: 56px 0 96px; }
.doc .wrap { display: grid; grid-template-columns: 240px minmax(0, 1fr); gap: 56px; align-items: start; }
.toc { position: sticky; top: 84px; display: grid; gap: 6px; font-size: 0.95rem; }
.toc a { color: var(--text-2); padding: 6px 0; }
.toc a:hover { color: var(--text); text-decoration: none; }
.prose h1 { margin-bottom: 8px; }
.prose > p:first-of-type { color: var(--text-2); font-size: 1.15rem; margin-bottom: 24px; }
.prose h2 { font-size: 1.5rem; margin: 48px 0 12px; padding-top: 12px; }
.prose h3 { margin: 26px 0 6px; }
.prose p { color: var(--text-2); max-width: var(--measure); margin-bottom: 12px; text-wrap: pretty; }
.prose ul { color: var(--text-2); max-width: var(--measure); padding-left: 22px; }
.prose li { margin-bottom: 6px; }
@media (max-width: 860px) { .doc .wrap { grid-template-columns: 1fr; gap: 28px; } .toc { position: static; } }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

/* Help index cards */
.help-grid { grid-template-columns: repeat(2, 1fr); margin: 24px 0 8px; }
.help-grid .card { color: var(--text); display: block; }
.help-grid .card:hover { text-decoration: none; border-color: var(--accent); }
.help-grid .card h3 { font-size: 1.05rem; margin-bottom: 6px; }
.help-grid .card p { font-size: 0.95rem; margin: 0; }
.toc a[aria-current="page"] { color: var(--accent); font-weight: 600; }
@media (max-width: 640px) { .help-grid { grid-template-columns: 1fr; } }