/* ScienceAI — shared site styles */

:root {
  --background: #050507;
  --background-alt: #0a0a0f;
  --foreground: #f5f5f9;
  --card: rgba(255, 255, 255, 0.035);
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(150, 130, 255, 0.45);
  --primary: #7c6ef5;
  --primary-light: #a89bff;
  --primary-dim: #4d3fc2;
  --accent: #34d5c7;
  --accent-2: #3b82f6;
  --muted-foreground: #9797a8;
  --border: rgba(255, 255, 255, 0.09);
  --radius: 18px;
  --shadow-glow: 0 0 0 1px rgba(150, 130, 255, 0.12), 0 20px 50px -12px rgba(124, 110, 245, 0.35);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --background: #fafafc;
    --background-alt: #ffffff;
    --foreground: #0d0d14;
    --card: #ffffff;
    --card-border: #e7e7ef;
    --card-border-hover: #b3a6ff;
    --primary: #5b45e0;
    --primary-light: #7a63f0;
    --primary-dim: #4534b0;
    --accent: #0f9c8f;
    --accent-2: #2563eb;
    --muted-foreground: #62626f;
    --border: #e7e7ef;
    --shadow-glow: 0 0 0 1px rgba(91, 69, 224, 0.08), 0 20px 45px -14px rgba(91, 69, 224, 0.22);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--foreground);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  position: relative;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
  position: relative;
}

/* ---------- Ambient background: gradient mesh + grid ---------- */
.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
}

.bg-glow::before,
.bg-glow::after,
.bg-glow span {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.35;
}

.bg-glow::before {
  width: 620px;
  height: 620px;
  top: -220px;
  left: -160px;
  background: var(--primary);
}

.bg-glow::after {
  width: 560px;
  height: 560px;
  top: 120px;
  right: -180px;
  background: var(--accent-2);
  opacity: 0.22;
}

.bg-glow span {
  width: 500px;
  height: 500px;
  bottom: -220px;
  left: 30%;
  background: var(--accent);
  opacity: 0.16;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 10%, transparent 75%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 0%, #000 10%, transparent 75%);
  opacity: 0.6;
  pointer-events: none;
}

@media (prefers-color-scheme: light) {
  .bg-glow::before,
  .bg-glow::after,
  .bg-glow span {
    opacity: 0.14;
  }
}

/* ---------- Header ---------- */
header.site {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--background) 70%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--border);
}

nav.site {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.brand .logo {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand .logo svg {
  width: 30px;
  height: 30px;
  overflow: visible;
}

.brand .ai-gradient {
  background: linear-gradient(120deg, var(--primary-light), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nav-links {
  display: flex;
  gap: 8px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  padding: 5px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted-foreground);
  padding: 7px 16px;
  border-radius: 999px;
  transition: color 0.15s ease, background 0.15s ease;
}

.nav-links a:hover {
  color: var(--foreground);
}

.nav-links a.active {
  color: var(--foreground);
  background: var(--border);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent-2));
  color: #ffffff;
  box-shadow: 0 8px 24px -8px rgba(124, 110, 245, 0.55);
}

.btn-primary:hover {
  box-shadow: 0 12px 32px -8px rgba(124, 110, 245, 0.75);
}

.btn-outline {
  background: var(--card);
  border-color: var(--card-border);
  color: var(--foreground);
}

.btn-outline:hover {
  border-color: var(--card-border-hover);
}

/* ---------- Hero ---------- */
.hero {
  padding-top: 120px;
  padding-bottom: 64px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--card-border);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--primary-light);
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(2.6rem, 5.6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin: 0 0 22px;
}

.hero h1 span {
  background: linear-gradient(120deg, var(--primary-light), var(--accent) 55%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero p.lead {
  max-width: 620px;
  margin: 0 auto 40px;
  font-size: 1.13rem;
  color: var(--muted-foreground);
}

.hero-actions {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Stats strip */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 64px;
}

.stat {
  background: var(--background-alt);
  padding: 28px 20px;
  text-align: center;
}

.stat .num {
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(120deg, var(--primary-light), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat .label {
  margin-top: 4px;
  font-size: 0.85rem;
  color: var(--muted-foreground);
}

/* ---------- Sections ---------- */
section {
  padding: 72px 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px;
}

.kicker {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-header h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 14px;
}

.section-header p {
  color: var(--muted-foreground);
  font-size: 1.05rem;
}

/* ---------- Feature grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 860px) {
  .grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Pillar cards (Beyond MVP) ---------- */
.pillar-card {
  border-top: 3px solid var(--pillar-color, var(--primary));
}

.pillar-card .pillar-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.02rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--pillar-color, var(--primary-light));
  margin-bottom: 12px;
}

.pillar-card p {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.95rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 30px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  position: relative;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
  border-color: var(--card-border-hover);
}

.card .icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--border);
  border: 1px solid var(--card-border);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--primary-light);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.95rem;
}

/* ---------- Stack pills ---------- */
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.pill {
  padding: 9px 18px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--card-border);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted-foreground);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.pill:hover {
  border-color: var(--card-border-hover);
  color: var(--foreground);
}

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  border-radius: 24px;
  border: 1px solid var(--card-border);
  background:
    radial-gradient(ellipse 120% 140% at 20% -20%, rgba(124, 110, 245, 0.25), transparent 60%),
    radial-gradient(ellipse 120% 140% at 90% 120%, rgba(59, 130, 246, 0.18), transparent 60%),
    var(--background-alt);
  padding: 64px 40px;
  text-align: center;
  overflow: hidden;
}

.cta-band h2 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.cta-band p {
  margin: 0 0 30px;
  color: var(--muted-foreground);
}

/* ---------- About page specifics ---------- */
.value-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 860px) {
  .value-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 560px) {
  .value-row {
    grid-template-columns: 1fr;
  }
}

.timeline {
  position: relative;
  margin-left: 12px;
  padding-left: 32px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(to bottom, var(--primary), var(--accent-2), transparent);
}

.timeline .step {
  position: relative;
}

.timeline .step::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 4px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--background);
  border: 2px solid var(--primary-light);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--primary) 20%, transparent);
}

.timeline .step .step-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.timeline .step h4 {
  margin: 4px 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.timeline .step p {
  margin: 0;
  color: var(--muted-foreground);
  max-width: 520px;
}

/* ---------- Footer ---------- */
footer.site {
  border-top: 1px solid var(--border);
  padding-top: 40px;
  padding-bottom: 40px;
  margin-top: 40px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-row .brand {
  font-size: 1rem;
}

.footer-row p {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 0.88rem;
}

/* ---------- Scroll reveal ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .hero {
    padding-top: 72px;
    padding-bottom: 56px;
  }
  .stats-row {
    margin-top: 44px;
  }
  .cta-band {
    padding: 40px 24px;
  }
  .card {
    padding: 24px;
  }
  .footer-row {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }
  .hero h1 {
    font-size: clamp(2.1rem, 9vw, 2.6rem);
  }
  .soft-break {
    display: none;
  }
  .eyebrow {
    font-size: 0.7rem;
    padding: 6px 12px;
    text-align: center;
  }
  .btn {
    padding: 10px 18px;
    font-size: 0.88rem;
  }
}