/* ThermaBridge site. One deliberately dark look, matching the web UX canvas. */
:root {
  --bg: #0E0F12;
  --surface: #14161B;
  --surface-2: #1B1E26;
  --border: #272A33;
  --border-strong: #3A3F4C;
  --text: #ECEDF1;
  --text-soft: #D5D8E0;
  --muted: #9BA1B0;
  --accent: #FF8A3D;
  --accent-ink: #1A0E04;
  --accent-soft: #FFB27F;
  --warn: #F2D58A;
  --font: 'IBM Plex Sans', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: dark;
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text); font-family: var(--font);
  font-size: 16px; line-height: 1.6;
  padding-left: max(0px, env(safe-area-inset-left, 0px)); padding-right: max(0px, env(safe-area-inset-right, 0px));
}
img { max-width: 100%; height: auto; }
a { color: var(--accent); }
a:hover { color: var(--accent-soft); }
:focus-visible { outline: 2px solid var(--accent-soft); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--accent); color: var(--accent-ink); padding: 10px 14px; z-index: 20; }
.skip:focus { left: 8px; top: 8px; }

.wrap { width: 100%; max-width: 1080px; margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
.narrow { max-width: 760px; }

/* Header */
.site-header { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; padding-top: 18px; padding-bottom: 18px; }
.brand { display: flex; align-items: center; gap: 12px; color: var(--text); text-decoration: none; flex: 1 1 auto; }
.brand:hover { color: var(--text); }
.brand-name { font-weight: 600; font-size: 18px; line-height: 1.2; }
.brand-tag { display: block; font-size: 12px; color: var(--text-soft); font-weight: 400; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 20px; font-size: 15px; }
.nav a { color: var(--text-soft); text-decoration: none; display: inline-flex; align-items: center; min-height: 44px; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent-soft); }

/* Banner */
.banner { position: relative; overflow: hidden; isolation: isolate; }
.banner-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; filter: saturate(1.15); }
.banner::before { content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(14,15,18,.62) 0%, rgba(14,15,18,.3) 50%, rgba(14,15,18,.5) 85%, var(--bg) 100%); }
.banner-caption { position: absolute; right: max(20px, env(safe-area-inset-right, 0px)); bottom: 14px; display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 8px; background: rgba(14,15,18,.72); font-size: 12px; color: var(--text-soft); }
.swatch { display: block; width: 56px; height: 8px; border-radius: 4px; background: linear-gradient(90deg, #000014, #3c0082, #be1e5a, #f06e14, #ffd228, #ffffe6); }
.hero { text-align: center; padding-top: 48px; padding-bottom: 36px; display: flex; flex-direction: column; gap: 14px; align-items: center; }
.hero h1 { margin: 0; font-size: clamp(28px, 5vw, 40px); line-height: 1.15; font-weight: 600; text-wrap: balance; text-shadow: 0 2px 18px rgba(14,15,18,.95); max-width: 22em; }
.hero p { margin: 0; font-size: 17px; max-width: 40em; color: var(--text); text-shadow: 0 2px 14px rgba(14,15,18,.95); }

/* Panels, buttons, forms */
.panel { background: rgba(14,15,18,.7); -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px); border: 2px dashed #8A90A0; border-radius: 16px;
  padding: 32px 20px; display: flex; flex-direction: column; align-items: center; gap: 16px; text-align: center; margin-bottom: 72px; }
.panel h2 { margin: 0; font-size: 22px; font-weight: 600; }
.panel p { margin: 0; color: var(--text-soft); max-width: 34em; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 26px; border-radius: 10px; background: var(--accent);
  color: var(--accent-ink); font: 600 16px/1 var(--font); text-decoration: none; border: 0; cursor: pointer; }
.btn:hover { background: var(--accent-soft); color: var(--accent-ink); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border-strong); }
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }
.waitlist { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; width: 100%; max-width: 520px; }
.waitlist label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.waitlist input[type=email] { flex: 1 1 240px; min-height: 48px; padding: 0 14px; border-radius: 10px; border: 1px solid var(--border-strong); background: var(--bg); color: var(--text); font: 16px var(--font); }
.waitlist .hp { position: absolute; left: -9999px; }
.fine { font-size: 13px; color: var(--muted); }
.fine a { color: var(--text-soft); }
#waitlist-msg { min-height: 1.5em; font-size: 14px; color: var(--text-soft); }

/* Sections */
section.block { padding-top: 40px; padding-bottom: 8px; }
.block h2 { margin: 0 0 14px; font-size: 24px; line-height: 1.25; font-weight: 600; text-wrap: balance; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 20px; display: flex; flex-direction: column; gap: 8px; min-width: 0; }
.card h3 { margin: 0; font-size: 17px; font-weight: 600; }
.card p { margin: 0; font-size: 15px; color: var(--muted); }
.step { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 0; padding: 0; list-style: none; }
.chips a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 16px; border: 1px solid var(--border-strong); border-radius: 999px; color: var(--text); text-decoration: none; font-size: 15px; }
.chips a:hover { border-color: var(--accent); color: var(--accent-soft); }
.center { text-align: center; }
.tick { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.tick li { padding-left: 28px; position: relative; color: var(--text-soft); }
.tick li::before { content: ""; position: absolute; left: 2px; top: .45em; width: 14px; height: 8px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }

/* Article pages */
.page-head { padding-top: 40px; padding-bottom: 8px; }
.crumbs { font-size: 14px; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--text-soft); }
.page-head h1 { margin: 0 0 12px; font-size: clamp(28px, 4.5vw, 38px); line-height: 1.2; font-weight: 600; text-wrap: balance; }
.lede { font-size: 18px; color: var(--text-soft); margin: 0; }
.prose { padding-top: 16px; padding-bottom: 24px; }
.prose h2 { margin: 36px 0 10px; font-size: 24px; line-height: 1.25; font-weight: 600; }
.prose h3 { margin: 24px 0 6px; font-size: 18px; font-weight: 600; }
.prose p, .prose li { color: var(--text-soft); max-width: 68ch; }
.prose ol, .prose ul { padding-left: 22px; display: grid; gap: 8px; }
.prose code { font-family: var(--mono); font-size: .9em; background: var(--surface-2); padding: 2px 6px; border-radius: 5px; }
.note { border: 1px solid var(--border-strong); background: var(--surface); border-radius: 10px; padding: 14px 16px; color: var(--text-soft); }
.note strong { color: var(--text); }
.note.warn { border-color: #8A6A1F; background: #1E1A10; color: var(--warn); }
.tablebox { overflow-x: auto; border: 1px solid var(--border); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 15px; min-width: 520px; }
th, td { text-align: left; padding: 12px 14px; border-top: 1px solid var(--border); vertical-align: top; }
thead th { border-top: 0; font-size: 12px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); font-weight: 500; }
.status { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 13px; border: 1px solid var(--border-strong); white-space: nowrap; }
.status.ok { border-color: #2C6B4A; color: #8FE3B4; }
.cta { margin: 40px 0 16px; padding: 24px 20px; border: 1px solid var(--accent); border-radius: 14px; background: var(--surface); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.cta p { margin: 0; color: var(--text-soft); max-width: 36em; }
.cta strong { color: var(--text); display: block; font-size: 18px; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); margin-top: 48px; padding-top: 24px; padding-bottom: 32px; font-size: 13px; color: var(--muted); display: grid; gap: 10px; }
.site-footer a { color: var(--text-soft); }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 20px; }
.footer-links a { display: inline-flex; align-items: center; min-height: 32px; }

@media (max-width: 760px) {
  .grid3, .grid2 { grid-template-columns: minmax(0, 1fr); }
  .hero { padding-top: 32px; }
  .banner-caption { position: static; margin: 0 auto 14px; width: fit-content; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }