/* ============================================================
   webdfw.net — themeable styles (light + dark)
   Tokens are defined for light by default; dark applies via the
   user's OS preference OR an explicit [data-theme] set by theme.js.
   ============================================================ */

:root {
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --ink: #0f172a;
  --muted: #5b6b82;
  --line: #e2e8f0;
  --brand: #2563eb;
  --brand-ink: #ffffff;
  --brand-dark: #1d4ed8;
  --ok: #16a34a;
  --warn: #b45309;
  --warn-bg: #fffbeb;
  --warn-line: #fcd34d;
  --hero-overlay: linear-gradient(180deg, rgba(246,248,251,.55) 0%, rgba(246,248,251,.86) 100%);
  --hero-image: url("/assets/img/hero-light.webp");
  --shadow: 0 1px 3px rgba(15,23,42,.06), 0 10px 30px rgba(15,23,42,.06);
  --radius: 14px;
}

/* Dark via OS preference (unless user forced light) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0f1c;
    --surface: #111a2e;
    --surface-2: #16223b;
    --ink: #e7eef8;
    --muted: #93a4bd;
    --line: #25324c;
    --brand: #5b8dff;
    --brand-ink: #08122a;
    --brand-dark: #3f74f0;
    --warn: #fbbf24;
    --warn-bg: #20283b;
    --warn-line: #3a4761;
    --hero-overlay: linear-gradient(180deg, rgba(8,12,22,.5) 0%, rgba(8,12,22,.86) 100%);
    --hero-image: url("/assets/img/hero-dark.webp");
    --shadow: 0 1px 3px rgba(0,0,0,.4), 0 12px 34px rgba(0,0,0,.34);
  }
}

/* Dark when user explicitly toggles it */
:root[data-theme="dark"] {
  --bg: #0a0f1c;
  --surface: #111a2e;
  --surface-2: #16223b;
  --ink: #e7eef8;
  --muted: #93a4bd;
  --line: #25324c;
  --brand: #5b8dff;
  --brand-ink: #08122a;
  --brand-dark: #3f74f0;
  --warn: #fbbf24;
  --warn-bg: #20283b;
  --warn-line: #3a4761;
  --hero-overlay: linear-gradient(180deg, rgba(8,12,22,.5) 0%, rgba(8,12,22,.86) 100%);
  --hero-image: url("/assets/img/hero-dark.webp");
  --shadow: 0 1px 3px rgba(0,0,0,.4), 0 12px 34px rgba(0,0,0,.34);
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.55;
  transition: background .25s ease, color .25s ease;
}

a { color: var(--brand); }

.wrap { max-width: 860px; margin: 0 auto; padding: 28px 18px 72px; }

/* ---------- Top nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav {
  max-width: 1040px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; padding: 12px 18px;
}
.brand {
  font-weight: 800; font-size: 1.15rem; letter-spacing: .2px;
  color: var(--ink); text-decoration: none;
}
.brand .dot { color: var(--brand); }
.nav-right { display: flex; align-items: center; gap: 8px; }
.nav-right a {
  color: var(--muted); text-decoration: none; font-weight: 600; font-size: .9rem;
  padding: 8px 10px; border-radius: 9px;
}
.nav-right a:hover { color: var(--ink); background: var(--surface-2); }
.theme-toggle {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--surface);
  color: var(--ink); cursor: pointer; font-size: 1.05rem; line-height: 1;
}
.theme-toggle:hover { border-color: var(--brand); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  text-align: center;
  padding: 88px 20px 72px;
  background: var(--hero-overlay), var(--hero-image, var(--surface-2)) center/cover no-repeat;
  border-bottom: 1px solid var(--line);
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem); margin: 0 0 14px; line-height: 1.08; letter-spacing: -.5px;
}
.hero .sub { color: var(--muted); font-size: clamp(1rem, 2.4vw, 1.25rem); margin: 0 auto 28px; max-width: 46ch; }

.btn {
  display: inline-block; background: var(--brand); color: var(--brand-ink);
  font-weight: 700; font-size: 1rem; padding: 13px 24px; border: 0;
  border-radius: 11px; text-decoration: none; cursor: pointer;
  transition: background .15s ease, transform .05s ease;
}
.btn:hover { background: var(--brand-dark); }
.btn:active { transform: translateY(1px); }
.btn:disabled { background: #94a3b8; cursor: not-allowed; }
.btn.big { font-size: 1.08rem; padding: 16px 28px; }
.btn.ghost { background: transparent; color: var(--brand); border: 1px solid var(--brand); }
.btn.ghost:hover { background: color-mix(in srgb, var(--brand) 10%, transparent); }

/* ---------- Intro + Features ---------- */
.section { max-width: 980px; margin: 0 auto; padding: 56px 18px 0; }
.intro { text-align: center; color: var(--muted); font-size: 1.1rem; max-width: 60ch; margin: 0 auto; }

.features {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px; margin: 40px auto 0;
}
.feature {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow);
}
.feature h3 { margin: 0 0 8px; font-size: 1.08rem; }
.feature p { margin: 0; color: var(--muted); font-size: .95rem; }
.feature .ic { font-size: 1.4rem; margin-bottom: 10px; display: block; }

.cta-band { text-align: center; padding: 64px 18px 8px; }
.cta-band h2 { font-size: 1.6rem; margin: 0 0 18px; }

.media {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px; margin: 44px auto 0; max-width: 980px;
}
.media img {
  width: 100%; height: 220px; object-fit: cover;
  border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow);
}

/* ============================================================
   Shared components used by /setup/ (cards, forms, tabs, etc.)
   ============================================================ */
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 20px; margin: 0 0 20px;
}
.card h2 { margin: 0 0 14px; font-size: 1.15rem; }

.fields { display: grid; gap: 14px; }
.field label { display: block; font-weight: 600; font-size: .9rem; margin-bottom: 5px; }
.field input {
  width: 100%; font-size: 1rem; padding: 11px 12px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--surface); color: var(--ink);
}
.field input:focus { outline: 2px solid var(--brand); border-color: var(--brand); }
.field .hint { color: var(--muted); font-size: .8rem; margin-top: 4px; }
.field input.invalid { border-color: #dc2626; }

.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 20px; }
.tab {
  flex: 1 1 auto; min-width: 120px; text-align: center;
  background: var(--surface); border: 1px solid var(--line);
  border-radius: 10px; padding: 11px 10px; font-weight: 600; font-size: .9rem;
  cursor: pointer; color: var(--ink);
}
.tab[aria-selected="true"] { background: var(--brand); border-color: var(--brand); color: var(--brand-ink); }

.settings { display: grid; gap: 8px; }
.row {
  display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px;
  padding: 10px 12px; background: var(--surface-2); border: 1px solid var(--line); border-radius: 10px;
}
.row .k { font-size: .78rem; color: var(--muted); text-transform: uppercase; letter-spacing: .4px; }
.row .v { font-weight: 600; word-break: break-all; }
.copy {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  border-radius: 8px; padding: 7px 12px; font-size: .82rem; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.copy:hover { border-color: var(--brand); color: var(--brand); }
.copy.copied { background: var(--ok); border-color: var(--ok); color: #fff; }

ol.steps { margin: 0; padding-left: 1.25rem; }
ol.steps li { margin: 0 0 10px; }

.notice {
  background: var(--warn-bg); border: 1px solid var(--warn-line); color: var(--warn);
  border-radius: 10px; padding: 12px 14px; font-size: .9rem; margin: 14px 0;
}
.notice strong { color: var(--warn); }

.panel-intro { color: var(--muted); margin: 0 0 16px; }
.hidden { display: none !important; }

footer.site-footer {
  text-align: center; color: var(--muted); font-size: .85rem;
  padding: 40px 18px; border-top: 1px solid var(--line); margin-top: 56px;
}
footer.site-footer a { color: var(--muted); margin: 0 8px; }
footer.site-footer a:hover { color: var(--brand); }