/* WhispRAI website — shared design tokens & components (Phase 2B) */

:root {
  --purple: #b048ff;
  --indigo: #7a58ff;
  --blue: #4a7cff;
  --cyan: #22d6ff;
  --teal: #00e0c2;
  --accent: #5b4fe8;
  --accent-ai: rgba(122, 88, 255, 0.72);

  --bg-base: #faf8f5;
  --bg-elevated: #ffffff;
  --bg-midnight: #07060e;
  --hero-gradient: linear-gradient(165deg, #faf8ff 0%, #f3efff 42%, #fff8f3 100%);
  --section-alt: linear-gradient(180deg, #f8f6ff 0%, #faf8f5 100%);

  --text-primary: #1a1625;
  --text-secondary: #4a4560;
  --text-muted: #6b6580;
  --text-on-dark: #f8f7fc;

  --border: rgba(26, 22, 37, 0.08);
  --border-strong: rgba(26, 22, 37, 0.14);
  --shadow-sm: 0 1px 2px rgba(26, 22, 37, 0.04);
  --shadow-md: 0 8px 32px rgba(91, 79, 232, 0.08);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-24: 96px;

  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --header-h: 72px;
  --content-max: 1120px;
  --prose-max: 720px;

  --gradient-brand: linear-gradient(
    90deg,
    var(--purple) 0%,
    var(--indigo) 26%,
    var(--blue) 50%,
    var(--cyan) 74%,
    var(--teal) 99%
  );
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-base: #0e0c14;
    --bg-elevated: #16131f;
    --text-primary: #f8f7fc;
    --text-secondary: #b8b4c8;
    --text-muted: #8a849c;
    --border: rgba(248, 247, 252, 0.08);
    --border-strong: rgba(248, 247, 252, 0.14);
    --hero-gradient: linear-gradient(165deg, #12101a 0%, #16122a 45%, #0f1218 100%);
    --section-alt: linear-gradient(180deg, #12101a 0%, #0e0c14 100%);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.35);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--indigo);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -100px;
  z-index: 200;
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: var(--space-4);
}

.wordmark {
  display: inline-flex;
  align-items: baseline;
  letter-spacing: -0.03em;
  line-height: 1;
  font-weight: 600;
  color: var(--text-primary);
  text-decoration: none;
}

.wordmark-whisp {
  font-weight: 600;
}

.wordmark-r {
  font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.wordmark-ai {
  margin-left: 0.08em;
  font-size: 0.58em;
  font-weight: 500;
  color: var(--accent-ai);
  letter-spacing: 0.02em;
  vertical-align: super;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg-base) 88%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.brand .wordmark {
  font-size: 1.25rem;
}

.site-nav {
  display: none;
  align-items: center;
  gap: var(--space-8);
}

.site-nav a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
}

.site-nav a:hover {
  color: var(--text-primary);
}

.header-cta {
  display: none;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  cursor: pointer;
  color: var(--text-primary);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: var(--header-h) 0 0 0;
  z-index: 99;
  background: var(--bg-base);
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-4);
  border-top: 1px solid var(--border);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav a {
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--border);
}

@media (min-width: 768px) {
  .site-nav {
    display: flex;
  }

  .header-cta {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.8rem 1.35rem;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background: var(--indigo);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-16) 0;
}

.section-alt {
  background: var(--section-alt);
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-4);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 42rem;
  line-height: 1.65;
}

.hero {
  background: var(--hero-gradient);
  padding: var(--space-16) 0 var(--space-24);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -20%;
  right: -10%;
  width: min(520px, 80vw);
  height: min(520px, 80vw);
  background: radial-gradient(circle, rgba(176, 72, 255, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  gap: var(--space-12);
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--bg-elevated) 80%, transparent);
  border: 1px solid var(--border);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.hero-wordmark {
  font-size: clamp(2rem, 5vw, 2.75rem);
  margin-bottom: var(--space-6);
}

.hero-headline {
  font-size: clamp(2rem, 5.5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.03em;
  max-width: 16ch;
  margin-bottom: var(--space-6);
}

.hero-sub {
  font-size: clamp(1.0625rem, 2.5vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 36rem;
  line-height: 1.65;
  margin-bottom: var(--space-8);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-mark {
  width: min(280px, 70vw);
  height: auto;
  filter: drop-shadow(0 24px 48px rgba(91, 79, 232, 0.15));
}

@media (min-width: 900px) {
  .hero-inner {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .hero-mark {
    width: 320px;
  }
}

.card-grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-12);
}

@media (min-width: 640px) {
  .card-grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 900px) {
  .card-grid-communities {
    grid-template-columns: repeat(3, 1fr);
  }
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  color: var(--accent);
  margin-bottom: var(--space-4);
  font-size: 1.25rem;
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.card p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.safety-grid {
  display: grid;
  gap: var(--space-6);
  margin-top: var(--space-12);
}

@media (min-width: 768px) {
  .safety-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.safety-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.safety-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: color-mix(in srgb, var(--teal) 12%, transparent);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.125rem;
}

.safety-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.safety-item p {
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

.beta-band {
  background: var(--bg-midnight);
  color: var(--text-on-dark);
  text-align: center;
}

.beta-band .section-title {
  color: var(--text-on-dark);
}

.beta-band .section-lead {
  color: color-mix(in srgb, var(--text-on-dark) 78%, transparent);
  margin: 0 auto;
}

.beta-band .btn-primary {
  margin-top: var(--space-8);
}

.site-footer {
  background: var(--bg-midnight);
  color: var(--text-on-dark);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1.4fr repeat(3, 1fr);
  }
}

.footer-brand .wordmark {
  color: var(--text-on-dark);
  font-size: 1.35rem;
  margin-bottom: var(--space-4);
}

.footer-tagline {
  font-size: 0.9375rem;
  color: color-mix(in srgb, var(--text-on-dark) 72%, transparent);
  max-width: 22rem;
  line-height: 1.6;
}

.footer-col h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text-on-dark) 55%, transparent);
  margin-bottom: var(--space-4);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-col a {
  color: color-mix(in srgb, var(--text-on-dark) 88%, transparent);
  text-decoration: none;
  font-size: 0.9375rem;
}

.footer-col a:hover {
  color: var(--text-on-dark);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid rgba(248, 247, 252, 0.1);
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  font-size: 0.8125rem;
  color: color-mix(in srgb, var(--text-on-dark) 55%, transparent);
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.page-center {
  min-height: calc(100vh - var(--header-h));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-12) var(--space-6);
  text-align: center;
}

.page-center h1 {
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  margin-bottom: var(--space-4);
}

.page-center p {
  color: var(--text-secondary);
  max-width: 28rem;
  margin: 0 auto var(--space-8);
}