/* =========================================================
   mnrv.ai — shared stylesheet
   Mobile-first, CSS custom properties, no framework
   ========================================================= */

/* ── Variables ── */
:root {
  --color-bg: #0a0e1a;
  --color-bg-card: #111827;
  --color-bg-nav: rgba(10, 14, 26, 0.92);
  --color-surface: #1a2236;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-primary: #6366f1;
  --color-primary-hover: #818cf8;
  --color-primary-glow: rgba(99, 102, 241, 0.25);
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-faint: #64748b;
  --color-heading: #f1f5f9;
  --color-white: #ffffff;

  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.15);

  --max-w: 1100px;
  --space-section: clamp(4rem, 8vw, 7rem);
}

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

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

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary-hover);
  text-decoration: none;
  transition: color 0.2s;
}
a:hover { color: var(--color-white); }

h1, h2, h3, h4 {
  color: var(--color-heading);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}
h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.15rem; }

p { color: var(--color-text); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

ul, ol { padding-left: 1.5rem; }
li { margin-bottom: 0.4rem; }

/* ── Layout helpers ── */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

.section { padding-block: var(--space-section); }
.section--alt { background-color: var(--color-bg-card); }

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg-nav);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav__logo {
  display: flex;
  align-items: center;
  line-height: 1;
}
.nav__logo img {
  display: block;
  width: auto;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  list-style: none;
  padding: 0;
}

.nav__links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
}
.nav__links a:hover { color: var(--color-white); }

/* ── Hero ── */
.hero {
  padding-block: clamp(5rem, 12vw, 9rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, rgba(99, 102, 241, 0.18), transparent);
  pointer-events: none;
}

.hero__eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary-hover);
  background: var(--color-primary-glow);
  border: 1px solid rgba(99, 102, 241, 0.35);
  border-radius: 999px;
  padding: 0.3rem 1rem;
  margin-bottom: 1.5rem;
}

.hero__title { margin-bottom: 1.25rem; }

.hero__title em {
  font-style: normal;
  background: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--color-text-muted);
  max-width: 620px;
  margin-inline: auto;
  margin-bottom: 2.5rem;
  line-height: 1.75;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-decoration: none;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 0 0 0 var(--color-primary-glow);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-white);
  box-shadow: 0 0 24px var(--color-primary-glow);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.btn--outline:hover {
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.2);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ── Feature grid ── */
.features__intro {
  text-align: center;
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 3.5rem;
}
.features__intro p { color: var(--color-text-muted); }

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, transform 0.2s;
}
.feature-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateY(-3px);
}

.feature-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-glow);
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  margin-bottom: 1.1rem;
}

.feature-card h3 { margin-bottom: 0.5rem; }
.feature-card p { font-size: 0.9rem; color: var(--color-text-muted); margin: 0; }

/* ── About section ── */
.about__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
}

.about__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary-hover);
  margin-bottom: 0.75rem;
}

.about__text { color: var(--color-text-muted); font-size: 0.975rem; }
.about__text + .about__text { margin-top: 0.75rem; }

.about__card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-card);
}

.about__card dl { display: grid; row-gap: 0.85rem; }
.about__card dt {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}
.about__card dd { font-size: 0.9rem; color: var(--color-text); }

/* ── CTA banner ── */
.cta-banner {
  text-align: center;
  padding-block: var(--space-section);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 80% at 50% 110%, rgba(99, 102, 241, 0.15), transparent);
  pointer-events: none;
}
.cta-banner h2 { margin-bottom: 0.75rem; }
.cta-banner p { color: var(--color-text-muted); margin-bottom: 2rem; }

/* ── Footer ── */
.footer {
  border-top: 1px solid var(--color-border);
  padding-block: 2.5rem;
  font-size: 0.85rem;
  color: var(--color-text-faint);
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  list-style: none;
  padding: 0;
}
.footer__links a { color: var(--color-text-faint); }
.footer__links a:hover { color: var(--color-text); }

/* ── Legal pages ── */
.legal-header {
  padding-block: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--color-border);
}
.legal-header p {
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

.legal-body {
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.legal-content {
  max-width: 760px;
  margin-inline: auto;
}

.legal-content h2 {
  font-size: 1.3rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--color-border);
}
.legal-content h2:first-child {
  margin-top: 0;
  padding-top: 0;
  border-top: none;
}

.legal-content h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
  color: var(--color-text);
}

.legal-content p,
.legal-content li {
  font-size: 0.925rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.legal-content ul,
.legal-content ol { margin-bottom: 1rem; }

.legal-content a { color: var(--color-primary-hover); }

.info-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-block: 1.5rem;
  font-size: 0.9rem;
}
.info-box p { color: var(--color-text-muted); margin: 0; font-size: 0.9rem; }

/* ── Ghost button (text-like, for "Learn more") ── */
.btn--ghost {
  background: transparent;
  color: var(--color-text-faint);
  border: none;
  padding-inline: 0.5rem;
}
.btn--ghost:hover {
  color: var(--color-text);
}

/* ── Hero trust row ── */
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  justify-content: center;
  margin-top: 1.75rem;
  margin-bottom: -0.5rem;
}

.trust-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.trust-item svg {
  color: var(--color-primary-hover);
  flex-shrink: 0;
}

/* ── App store badges ── */
.app-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
  margin-top: 2rem;
}

.app-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text-faint);
  cursor: default;
  user-select: none;
}

.app-badge__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.app-badge__label {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--color-text-faint);
}

.app-badge__store {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

/* ── Audience section ── */
.audience__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.audience-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.4rem 1.5rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: border-color 0.2s, transform 0.2s;
}

.audience-card:hover {
  border-color: rgba(99, 102, 241, 0.35);
  transform: translateY(-3px);
}

.audience-card__icon {
  font-size: 1.75rem;
  line-height: 1;
  flex-shrink: 0;
  margin-top: 0.1rem;
}

.audience-card strong {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 0.3rem;
}

.audience-card p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* ── CTA banner actions ── */
.cta-banner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav__links { display: none; }

  .about__inner {
    grid-template-columns: 1fr;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; justify-content: center; }
  .app-badges { flex-direction: column; align-items: center; }
  .cta-banner__actions { flex-direction: column; align-items: center; }
  .audience__grid { grid-template-columns: 1fr; }
  .hero__trust { flex-direction: column; align-items: center; gap: 0.6rem; }
}