/* subtwo.ai — independent studio site.
   Visual language inspired by Apple marketing pages: oversized typography,
   generous breathing room, full-bleed sections. Modern neutral palette —
   pure-ish white / near-black with a single quiet accent. */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f5f7;         /* Apple-style soft section background */
  --border: #d2d2d7;
  --text: #1d1d1f;           /* near-black */
  --text-secondary: #515154;
  --text-muted: #86868b;
  --accent: #1d1d1f;         /* mono — same as text, distinguished by weight */
  --accent-soft: #6e6e73;
  color-scheme: light;
  background: var(--bg);
}

:root[data-theme="dark"] {
  --bg: #000000;
  --bg-alt: #161617;
  --border: #2c2c2e;
  --text: #f5f5f7;
  --text-secondary: #a1a1a6;
  --text-muted: #86868b;
  --accent: #f5f5f7;
  --accent-soft: #a1a1a6;
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #000000;
    --bg-alt: #161617;
    --border: #2c2c2e;
    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-muted: #86868b;
    --accent: #f5f5f7;
    --accent-soft: #a1a1a6;
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Inter", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--text);
  text-decoration: none;
}

/* Theme toggle */
.theme-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: inherit;
  z-index: 10;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  background: var(--bg-alt);
}

.theme-toggle .icon-moon {
  display: none;
}
:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: none;
}
:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: inline;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) .theme-toggle .icon-sun {
    display: none;
  }
  :root:not([data-theme]) .theme-toggle .icon-moon {
    display: inline;
  }
}

/* ---- HERO ---- */
.hero {
  width: 100%;
  background: var(--bg);
  padding: 0;
}

.hero-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 200px 32px 160px;
  text-align: center;
}

.wordmark {
  font-size: clamp(72px, 13vw, 156px);
  font-weight: 700;
  letter-spacing: -0.045em;
  line-height: 1;
  margin: 0 0 36px;
  color: var(--text);
}

.tagline {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--text-secondary);
  max-width: 760px;
  margin: 0 auto;
}

/* ---- STATEMENT (large prose between hero and product) ---- */
.statement {
  width: 100%;
  background: var(--bg-alt);
  padding: 0;
}

.statement-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 140px 32px;
  text-align: center;
}

.statement p {
  font-size: clamp(24px, 3.4vw, 40px);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--text);
  margin: 0;
}

.statement-soft {
  display: inline;
  color: var(--text-muted);
  font-weight: 500;
}

/* ---- PRODUCT FEATURE (full-bleed, Apple-style) ---- */
.product-feature {
  width: 100%;
  background: var(--bg);
  padding: 0;
}

.product-feature-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 160px 32px;
  text-align: center;
}

.product-feature-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin: 0 0 20px;
}

.product-feature-title {
  font-size: clamp(64px, 9vw, 112px);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0 0 32px;
  color: var(--text);
}

.product-feature-body {
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 400;
  line-height: 1.5;
  color: var(--text-secondary);
  max-width: 660px;
  margin: 0 auto 40px;
}

.product-feature-link {
  display: inline-flex;
  align-items: center;
  font-size: clamp(17px, 1.6vw, 20px);
  font-weight: 500;
  color: var(--text);
  letter-spacing: -0.005em;
  border-bottom: 1px solid var(--border);
  padding-bottom: 4px;
  transition: opacity 0.2s ease, border-color 0.2s ease;
}

.product-feature-link:hover {
  opacity: 0.7;
  border-color: var(--text);
}

/* ---- FOOTER ---- */
.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 40px 32px;
}

.footer-line {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
  margin-block: 0;
}

.footer-mark {
  letter-spacing: 0.06em;
}

.footer-line a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer-line a:hover {
  color: var(--text);
}

/* Responsive */
@media (max-width: 640px) {
  .hero-inner {
    padding: 120px 24px 96px;
  }
  .statement-inner {
    padding: 88px 24px;
  }
  .product-feature-inner {
    padding: 96px 24px;
  }
  .site-footer {
    padding: 32px 24px;
  }
}