/* Tahoe design system — macOS “Liquid Glass” inspired */
/* Typography uses system UI fonts for a native feel. */

:root {
  color-scheme: light dark;

  /* Base tokens (light) */
  --bg: #f3f5f8;
  --bg-accent: #eaf0ff;
  --text: rgba(8, 10, 15, 0.92);
  --muted: rgba(8, 10, 15, 0.72);
  --accent: #2676ff;
  --accent-soft: color-mix(in srgb, #2676ff 20%, transparent);
  --focus: #6aa2ff;

  --stroke-1: rgba(0, 0, 0, 0.08);
  --stroke-2: rgba(0, 0, 0, 0.12);
  --glass-1: rgba(255, 255, 255, 0.55);
  --glass-2: rgba(255, 255, 255, 0.42);
  --glass-3: rgba(255, 255, 255, 0.28);
  --shadow-sm: 0 6px 14px rgba(0,0,0,0.08);
  --shadow-md: 0 20px 40px rgba(0,0,0,0.10);
  --shadow-lg: 0 40px 80px rgba(0,0,0,0.12);

  --radius-sm: 10px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 30px;

  /* pointer reactive background */
  --pointer-x: 50%;
  --pointer-y: 50%;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0c10;
    --bg-accent: #12151e;
    --text: rgba(240, 244, 255, 0.96);
    --muted: rgba(220, 228, 255, 0.72);
    --accent: #6a88ff;
    --accent-soft: color-mix(in srgb, #6a88ff 25%, transparent);
    --focus: #9cb6ff;

    --stroke-1: rgba(255, 255, 255, 0.08);
    --stroke-2: rgba(255, 255, 255, 0.12);
    --glass-1: rgba(16, 20, 32, 0.62);
    --glass-2: rgba(16, 20, 36, 0.46);
    --glass-3: rgba(16, 20, 36, 0.32);
    --shadow-sm: 0 8px 18px rgba(5,8,16,0.55);
    --shadow-md: 0 26px 60px rgba(5,8,16,0.55);
    --shadow-lg: 0 60px 120px rgba(5,8,16,0.6);
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "SF Pro Text", "SF Pro Display", sans-serif;
  color: var(--text);
  background:
    radial-gradient(24rem 24rem at calc(var(--pointer-x)) calc(var(--pointer-y)), var(--accent-soft), transparent 70%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-accent) 100%);
  min-height: 100%;
}

/* Ambient overlays for depth */
body::before {
  content: "";
  position: fixed;
  inset: -40vh -40vw;
  background:
    radial-gradient(50rem 50rem at calc(var(--pointer-x)) calc(var(--pointer-y)), color-mix(in srgb, var(--accent) 18%, transparent), transparent 70%),
    radial-gradient(30rem 30rem at 80% 10%, color-mix(in srgb, #b0e1ff 14%, transparent), transparent 70%);
  pointer-events: none;
  z-index: -1;
  opacity: .55;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
  background: linear-gradient(180deg, color-mix(in srgb, var(--bg-accent) 65%, transparent) 0%, transparent 100%);
}

/* Background stage visuals (subtle in Tahoe variant) */
.liquid-stage { position: fixed; inset: 0; overflow: hidden; z-index: -3; }
.liquid-blob { position: absolute; width: 42vw; height: 42vw; max-width: 560px; max-height: 560px; border-radius: 50%; filter: blur(36px) saturate(150%); opacity: 0.28; mix-blend-mode: screen; }
.liquid-blob::after { content: ""; position: absolute; inset: 22%; border-radius: 50%; background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.45), rgba(255,255,255,0)); filter: blur(12px); opacity: .5; }
.blob-one { top: -16vw; left: -14vw; background: radial-gradient(circle at 30% 30%, color-mix(in srgb, var(--accent) 60%, transparent), transparent); }
.blob-two { bottom: -18vw; right: -8vw; background: radial-gradient(circle at 70% 40%, color-mix(in srgb, #82ffd8 40%, transparent), transparent); }
.blob-three { top: 32vh; left: 50vw; background: radial-gradient(circle at 50% 50%, color-mix(in srgb, #a286ff 36%, transparent), transparent); }
.grid-glow { position: absolute; inset: -20vh -20vw; background: radial-gradient(1000px 1000px at 50% 110%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 85%); opacity: .12; pointer-events: none; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 12;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 18px;
  backdrop-filter: saturate(150%) blur(14px);
  background: linear-gradient(180deg, var(--glass-1) 0%, var(--glass-2) 100%);
  border-bottom: 1px solid var(--stroke-1);
  box-shadow: var(--shadow-sm);
}
.brand { font-weight: 800; letter-spacing: .2px; text-transform: lowercase; display: flex; align-items: baseline; gap: 4px; }
.brand .dot { color: var(--accent); }

.nav a {
  color: color-mix(in srgb, var(--text) 72%, transparent);
  text-decoration: none; margin-left: 18px; font-weight: 600; font-size: 15px;
  transition: color 180ms ease, text-shadow 180ms ease;
}
.nav a:hover { color: var(--text); text-shadow: 0 0 10px var(--accent-soft); }
.nav .alt-link { padding: 8px 12px; border-radius: 999px; border: 1px solid var(--stroke-1); background: var(--glass-2); }

/* Nav item progress bars */
.nav a:not(.alt-link) { position: relative; padding-bottom: 6px; --progress-color: var(--accent); }
.nav a:not(.alt-link)::after {
  content: "";
  position: absolute; left: 0; right: 0; bottom: 0;
  height: 2px; border-radius: 999px;
  background:
    linear-gradient(90deg, var(--progress-color, var(--accent)), var(--progress-color, var(--accent))) 0 0 / calc(var(--progress, 0) * 100%) 100% no-repeat,
    color-mix(in srgb, var(--text) 14%, transparent);
  opacity: 0.95;
  transition: background-size 140ms linear, background 200ms ease;
  will-change: background-size;
}

/* Hero */
.hero {
  position: relative; text-align: center; overflow: hidden; isolation: isolate;
  padding: clamp(80px, 12vh, 120px) 24px clamp(80px, 12vh, 120px);
  max-width: 1120px; margin: 0 auto;
}
.hero-logo { display: inline-flex; align-items: center; justify-content: center; margin: 0 auto 24px; width: clamp(160px, 26vw + 80px, 280px); padding: 8px 16px; border-radius: 24px; border: 1px solid var(--stroke-1); background: var(--glass-1); backdrop-filter: saturate(150%) blur(18px); box-shadow: var(--shadow-sm); }
.hero-logo img { width: 100%; height: auto; max-height: 150px; display: block; border: none; }
.hero h1 { font-size: clamp(36px, 7vw, 70px); margin: 0 0 14px; line-height: 1.05; letter-spacing: -0.02em; background: linear-gradient(180deg, var(--text) 0%, color-mix(in srgb, var(--text) 75%, transparent) 100%); -webkit-text-fill-color: transparent; -webkit-background-clip: text; background-clip: text; }
.lead { font-size: clamp(16px, 2.2vw, 22px); color: var(--muted); margin: 0 auto 24px; max-width: 820px; background: var(--glass-2); border-radius: 20px; padding: 16px 22px; border: 1px solid var(--stroke-1); backdrop-filter: blur(18px) saturate(140%); box-shadow: var(--shadow-sm); }
.subtle { color: color-mix(in srgb, var(--text) 58%, transparent); font-size: 13px; letter-spacing: 0.12em; text-transform: uppercase; }

/* Buttons */
.btn { position: relative; padding: 12px 20px; border-radius: 999px; border: 1px solid var(--stroke-1); color: var(--text); text-decoration: none; background: var(--glass-2); backdrop-filter: blur(16px) saturate(140%); box-shadow: var(--shadow-sm); font-weight: 600; letter-spacing: .02em; transition: transform 160ms ease, box-shadow 160ms ease; overflow: hidden; }
.btn.primary { background: linear-gradient(145deg, color-mix(in srgb, var(--accent) 40%, transparent) 0%, var(--glass-2) 100%); border-color: color-mix(in srgb, var(--accent) 45%, var(--stroke-1)); color: #fff; box-shadow: 0 18px 42px color-mix(in srgb, var(--accent) 30%, transparent); }
.btn:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

.cta { display: flex; gap: 14px; justify-content: center; margin: 20px 0 10px; flex-wrap: wrap; }

/* Sections and cards */
.section-title { text-align: center; margin: 42px 0 16px; font-size: 28px; letter-spacing: -0.01em; }

.features { position: relative; padding: 44px 24px 64px; max-width: 1240px; margin: 0 auto; border-radius: 30px; background: var(--glass-1); border: 1px solid var(--stroke-1); backdrop-filter: blur(22px) saturate(140%); box-shadow: var(--shadow-md); overflow: hidden; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; }

.card-icon, .panel-icon, .stat-icon { width: 50px; height: 50px; border-radius: 16px; background: var(--glass-2); border: 1px solid var(--stroke-1); display: inline-flex; align-items: center; justify-content: center; color: color-mix(in srgb, var(--text) 90%, transparent); box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04), var(--shadow-sm); margin-bottom: 12px; backdrop-filter: blur(12px) saturate(140%); }
.card-icon svg, .panel-icon svg, .stat-icon svg { width: 26px; height: 26px; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; fill: none; }

.card { position: relative; background: var(--glass-2); border: 1px solid var(--stroke-1); border-radius: 20px; padding: 22px; backdrop-filter: blur(22px) saturate(150%); display: flex; flex-direction: column; gap: 10px; min-height: 210px; transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease; overflow: hidden; box-shadow: var(--shadow-sm); }
.card:hover { transform: translateY(-4px) scale(1.01); border-color: var(--stroke-2); box-shadow: var(--shadow-md); }
.eyebrow { font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: color-mix(in srgb, var(--text) 70%, transparent); }
.card h3 { margin: 0; font-size: 20px; font-weight: 700; color: color-mix(in srgb, var(--text) 96%, transparent); }
.card p { margin: 0; color: var(--muted); line-height: 1.55; }

/* About */
.about { padding: 42px 24px 80px; position: relative; }
.about-inner { position: relative; max-width: 1120px; margin: 0 auto; background: var(--glass-1); border: 1px solid var(--stroke-1); border-radius: 30px; padding: 36px clamp(22px, 5vw, 52px); box-shadow: var(--shadow-md); }
.about-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 32px; }
.about-copy { display: flex; flex-direction: column; gap: 18px; }
.about-copy h2 { font-size: 28px; margin: 0; }
.about-lead { margin: 0; color: color-mix(in srgb, var(--text) 78%, transparent); line-height: 1.66; font-size: 18px; }
.pill-row { display: flex; flex-wrap: wrap; gap: 10px; }
.pill { display: inline-flex; align-items: center; padding: 8px 12px; border-radius: 999px; font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: color-mix(in srgb, var(--text) 85%, transparent); background: var(--glass-2); border: 1px solid var(--stroke-1); box-shadow: var(--shadow-sm); }
.about-panels { display: flex; flex-direction: column; gap: 16px; }
.about-panel { position: relative; background: var(--glass-2); border: 1px solid var(--stroke-1); border-radius: 20px; padding: 20px 20px 22px; display: flex; flex-direction: column; gap: 10px; box-shadow: var(--shadow-sm); }
.about-panel header { display: flex; align-items: center; gap: 12px; }
.about-panel h3 { margin: 0; font-size: 19px; color: color-mix(in srgb, var(--text) 96%, transparent); }
.about-panel ul { margin: 0; padding-left: 18px; color: var(--muted); line-height: 1.58; display: grid; gap: 6px; }

.about-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; margin-top: 24px; }
.stat { position: relative; background: var(--glass-2); border: 1px solid var(--stroke-1); border-radius: 18px; padding: 18px 20px; display: flex; flex-direction: column; gap: 8px; box-shadow: var(--shadow-sm); }
.stat-title { font-weight: 600; font-size: 16px; letter-spacing: 0.02em; color: color-mix(in srgb, var(--text) 92%, transparent); }
.stat p { margin: 0; color: var(--muted); line-height: 1.6; }
.about-note { margin: 0; color: color-mix(in srgb, var(--text) 72%, transparent); font-size: 14px; letter-spacing: .03em; line-height: 1.7; text-align: center; }

/* Contact */
.contact { padding: 64px 24px 100px; }
.contact-inner { max-width: 1120px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 36px; background: var(--glass-1); border: 1px solid var(--stroke-1); border-radius: 30px; padding: clamp(26px, 6vw, 42px); box-shadow: var(--shadow-md); position: relative; overflow: hidden; }
.contact-copy { display: flex; flex-direction: column; gap: 16px; }
.contact-copy h2 { margin: 0; font-size: 28px; }
.contact-copy p { margin: 0; color: color-mix(in srgb, var(--text) 80%, transparent); line-height: 1.7; }
.contact-points { margin: 0; padding-left: 0; list-style: none; display: grid; gap: 10px; }
.contact-points li { position: relative; padding-left: 18px; color: var(--muted); line-height: 1.6; }
  .contact-points li::before { content: ""; position: absolute; left: 0; top: 9px; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 12px var(--accent-soft); }

  /* Theme link style for mailto link in contact list */
  .contact-points a[href^="mailto:"] {
    color: var(--accent);
    text-decoration: underline;
    text-decoration-color: color-mix(in srgb, var(--accent) 60%, transparent);
    text-decoration-thickness: 2px;
    text-underline-offset: 3px;
    font-weight: 600;
    transition: color 160ms ease, text-shadow 160ms ease, text-decoration-color 160ms ease;
  }
  .contact-points a[href^="mailto:"]:hover {
    text-decoration-color: var(--accent);
    text-shadow: 0 0 10px var(--accent-soft);
  }
  .contact-points a[href^="mailto:"]:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
    text-decoration-color: var(--focus);
  }

.contact-form { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px 18px; padding: 16px; border-radius: 22px; background: var(--glass-2); border: 1px solid var(--stroke-1); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02); }
.field { display: flex; flex-direction: column; gap: 8px; }
.field label { font-size: 12px; font-weight: 600; letter-spacing: 0.05em; text-transform: uppercase; color: color-mix(in srgb, var(--text) 70%, transparent); }
.field input, .field textarea, .field select { width: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--stroke-1); background: var(--glass-1); color: var(--text); font-size: 15px; transition: border-color 160ms ease, box-shadow 160ms ease; }
.field textarea { min-height: 120px; line-height: 1.5; resize: vertical; }
.field-textarea { grid-column: 1 / -1; }
.field input::placeholder, .field textarea::placeholder { color: color-mix(in srgb, var(--text) 45%, transparent); }
.field select { appearance: none; }
.field select:focus, .field input:focus, .field textarea:focus { outline: none; border-color: var(--focus); box-shadow: 0 0 0 4px color-mix(in srgb, var(--focus) 25%, transparent); }

.contact-form__captcha { grid-column: 1 / -1; padding-top: 6px; }
.contact-form .btn.primary { grid-column: 1 / -1; justify-self: flex-start; margin-top: 6px; }

/* Thank-you banner */
.kv-container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.contact-thankyou { position: relative; z-index: 1; display: none; grid-column: 1 / -1; flex-direction: column; gap: 16px; padding: 20px 22px; border-radius: 22px; background: var(--glass-1); border: 1px solid var(--stroke-1); box-shadow: inset 0 0 0 1px rgba(255,255,255,.02); text-align: left; transition: opacity 300ms ease, transform 300ms ease; }
.contact-thankyou h3 { margin: 0; font-size: 22px; }
.contact-thankyou p { margin: 0; color: color-mix(in srgb, var(--text) 78%, transparent); line-height: 1.6; }
.contact-thankyou .btn { align-self: flex-start; margin-top: 6px; }
.contact-thankyou[hidden] { display: none !important; }
.contact-thankyou:not([hidden]) { display: flex; }
.contact-thankyou.fade-out { opacity: 0; transform: translateY(-4px); }

/* Footer */
.site-footer { position: relative; border-top: 1px solid var(--stroke-1); padding: 20px 22px 26px; text-align: center; color: color-mix(in srgb, var(--text) 72%, transparent); background: var(--glass-2); backdrop-filter: blur(14px) saturate(135%); box-shadow: var(--shadow-sm); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* Responsive adjustments */
@media (max-width: 1080px) {
  .hero { padding: 96px 20px 96px; }
  .features { padding: 40px 22px 56px; border-radius: 26px; }
  .about-inner { padding: 28px 22px; border-radius: 26px; }
  .contact-inner { gap: 30px; padding: 30px; }
}

@media (max-width: 960px) {
  .site-header { padding: 12px 18px; }
  .nav a { margin-left: 14px; }
  .about-grid { grid-template-columns: 1fr; gap: 26px; }
  .contact-inner { grid-template-columns: 1fr; padding: 26px; }
  .contact-form { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .cta { gap: 12px; }
  .site-header {
    position: fixed;
    top: 10px;
    left: 10px;
    right: 10px;
    border-radius: 18px;
    padding: 10px 14px;
    box-shadow: var(--shadow-sm);
  }
  main { padding-top: 96px; }
  .hero { padding-top: 52px; }
  .hero-logo { margin-bottom: 12px; }
  .features { padding: 32px 18px 44px; }
  .grid { gap: 18px; }
  .about-stats { gap: 16px; }
  .contact { padding: 54px 20px 80px; }
  .contact-inner { padding: 22px; }
  .contact-form { padding: 14px; }
  /* Make nav fit on small screens: reduce spacing and simplify alt-link */
  .nav a { margin-left: 12px; }
  .nav .alt-link { border: 0; background: transparent; padding: 0 8px; }
}

/* Small mobile layout to match Classic */
@media (max-width: 620px) {
  .site-header { flex-direction: column; gap: 10px; }
  .nav a { margin-left: 0; margin-right: 12px; }
}

/* Keep header visible on desktop by fixing it to the top */
@media (min-width: 721px) {
  .site-header { position: fixed; top: 0; left: 0; right: 0; border-radius: 0; }
  main { padding-top: 72px; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { transition: none; }
  .liquid-blob { display: none; }
}