/* Sun Vault Roofing instant estimate. Mobile-first; light by default, dark via OS setting or ?theme=dark. */
:root {
  --bg: #f7f4ec; --panel: #ffffff; --border: #ddd6c4; --text: #1b2a34; --muted: #5d6b75;
  --accent: #e07f00; --accent-text: #ffffff; --teal: #2b8a9b; --danger: #b3261e; --ok: #2f7d4f; --focus: #1a73e8;
}
:root[data-theme="dark"] {
  --bg: #15242f; --panel: #1c3140; --border: #2b4150; --text: #f2ecdd; --muted: #93a4b0;
  --accent: #ff9100; --accent-text: #15242f; --teal: #46a6b8; --danger: #ff8a80; --ok: #6fc59a; --focus: #8ab4f8;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15242f; --panel: #1c3140; --border: #2b4150; --text: #f2ecdd; --muted: #93a4b0;
    --accent: #ff9100; --accent-text: #15242f; --teal: #46a6b8; --danger: #ff8a80; --ok: #6fc59a; --focus: #8ab4f8;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
body { min-height: 100vh; }
main { max-width: 640px; margin: 0 auto; padding: 20px 16px 48px; }
h1 { font-size: 1.6rem; line-height: 1.2; margin: 8px 0 6px; }
h2 { font-size: 1.15rem; margin: 0 0 8px; }
p { margin: 8px 0; }
.muted { color: var(--muted); font-size: .92rem; }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 16px; margin: 14px 0; }
label { display: block; font-weight: 600; margin: 12px 0 4px; }
input[type=text], input[type=email], input[type=tel] {
  width: 100%; padding: 12px; font-size: 1rem; border: 1px solid var(--border); border-radius: 8px; background: var(--bg); color: var(--text);
}
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.row { display: grid; gap: 10px; }
@media (min-width: 520px) { .row.two { grid-template-columns: 1fr 1fr; } }
button, .btn {
  display: inline-block; border: 0; border-radius: 8px; padding: 13px 20px; font-size: 1rem; font-weight: 700; cursor: pointer;
  background: var(--accent); color: var(--accent-text); text-decoration: none; text-align: center;
}
button[disabled] { opacity: .55; cursor: not-allowed; }
button.secondary { background: transparent; color: var(--text); border: 1px solid var(--border); }
.full { width: 100%; margin-top: 14px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.chips label { display: inline-flex; align-items: center; gap: 6px; margin: 0; font-weight: 500; border: 1px solid var(--border); border-radius: 999px; padding: 8px 14px; cursor: pointer; }
.chips input:checked + span { font-weight: 700; color: var(--accent); }
.tiers { display: grid; gap: 10px; margin-top: 10px; }
.tier { border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; display: flex; justify-content: space-between; gap: 12px; align-items: baseline; flex-wrap: wrap; }
.tier .n { font-weight: 700; }
.tier .s { color: var(--muted); font-size: .88rem; }
.tier .p { font-size: 1.25rem; font-weight: 800; white-space: nowrap; }
.storm { border-left: 4px solid var(--teal); }
.storm li.recent { font-weight: 800; }
.storm ul { margin: 6px 0 0 18px; padding: 0; }
.err { color: var(--danger); font-weight: 600; min-height: 1.4em; }
.ok { color: var(--ok); font-weight: 700; }
.hidden { display: none !important; }
.spinner { width: 28px; height: 28px; border: 4px solid var(--border); border-top-color: var(--accent); border-radius: 50%; animation: spin 0.9s linear infinite; margin: 18px auto; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .spinner { animation-duration: 3s; } }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; margin-top: 12px; }
.check input { margin-top: 5px; width: 20px; height: 20px; flex: none; }
.close { position: fixed; top: 10px; right: 12px; background: var(--panel); color: var(--text); border: 1px solid var(--border); padding: 8px 12px; z-index: 10; }
.sr { position: absolute; left: -9999px; }
footer { margin-top: 26px; font-size: .8rem; color: var(--muted); }

.chips input:focus-visible + span { outline: 3px solid var(--focus); outline-offset: 4px; border-radius: 6px; }
.chips label:has(input:checked) { border-color: var(--accent); }