/* === Therascript Landing Page === */

:root {
  --bg-base: #fafaf9;
  --bg-surface: #ffffff;
  --bg-subtle: #f5f5f4;
  --text-primary: #171717;
  --text-secondary: #525252;
  --text-tertiary: #a8a29e;
  --accent: #1884b5;
  --accent-hover: #136a91;
  --accent-soft: #d6ecf5;
  --border: #e7e5e4;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --container: 1200px;
  --container-narrow: 880px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;
  --space-2xl: 6rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-base: #0a0a0a;
    --bg-surface: #161616;
    --bg-subtle: #1c1917;
    --text-primary: #fafafa;
    --text-secondary: #a3a3a3;
    --text-tertiary: #737373;
    --accent: #66b7dc;
    --accent-hover: #8acee6;
    --accent-soft: #0e3f58;
    --border: #292524;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family:
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    system-ui,
    sans-serif;
  font-size: 18px;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }
}

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: var(--bg-subtle);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: var(--space-sm);
  top: var(--space-sm);
  background: var(--accent);
  color: #fff;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  text-decoration: none;
  z-index: 100;
  clip-path: inset(50%);
  width: 1px;
  height: 1px;
  overflow: hidden;
  white-space: nowrap;
}

.skip-link:focus {
  clip-path: none;
  width: auto;
  height: auto;
  overflow: visible;
  white-space: normal;
}

/* === Header === */

.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-md) var(--space-lg);
  max-width: var(--container);
  margin: 0 auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  font-weight: 600;
  font-size: 1.0625rem;
  color: var(--text-primary);
  text-decoration: none;
}

.brand-mark {
  color: var(--accent);
  flex-shrink: 0;
}

.nav-link {
  font-size: 0.95rem;
  text-decoration: none;
  color: var(--text-secondary);
}

.nav-link:hover {
  color: var(--accent);
}

@media (max-width: 480px) {
  .site-header {
    padding: var(--space-sm) var(--space-md);
  }
  .nav-link {
    font-size: 0.875rem;
  }
}

/* === Hero === */

.hero {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
  display: grid;
  gap: var(--space-xl);
}

@media (min-width: 960px) {
  .hero {
    grid-template-columns: 1.05fr 1fr;
    align-items: center;
    padding-top: var(--space-2xl);
  }
}

.hero h1 {
  font-size: clamp(2.25rem, 5.5vw, 3.5rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 var(--space-md);
  font-weight: 700;
}

.hero .lede {
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  line-height: 1.55;
  color: var(--text-secondary);
  margin: 0 0 var(--space-lg);
  max-width: 36em;
}

.hero .hint {
  font-size: 0.9375rem;
  color: var(--text-tertiary);
  margin: var(--space-sm) 0 0;
}

.hero-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  height: auto;
}

/* === Buttons / CTA === */

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.cta-center {
  justify-content: center;
  margin-top: var(--space-xl);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  padding: 1rem 2rem;
  font-size: 1.0625rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  transition:
    transform 120ms ease,
    box-shadow 120ms ease,
    background-color 120ms ease;
  min-height: 56px;
  line-height: 1;
}

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

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

@media (max-width: 480px) {
  .btn {
    min-height: 52px;
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
  }
}

@media (prefers-color-scheme: dark) {
  .btn-primary {
    color: #0a0a0a;
  }
  .btn-primary:hover {
    color: #0a0a0a;
  }
}

/* === Section Layout === */

main > section {
  max-width: var(--container);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-lg);
}

main > section + section {
  padding-top: 0;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-lg);
  font-weight: 700;
}

h3 {
  font-size: 1.25rem;
  line-height: 1.35;
  margin: 0 0 var(--space-xs);
  font-weight: 600;
}

p {
  margin: 0 0 var(--space-sm);
  color: var(--text-secondary);
}

/* === Benefits === */

.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-md);
}

.benefit-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  box-shadow: var(--shadow-sm);
}

.benefit-card h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.benefit-card p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.55;
}

/* === Features === */

.features {
  display: grid;
  gap: var(--space-2xl);
}

.feature {
  display: grid;
  gap: var(--space-lg);
  align-items: center;
}

@media (min-width: 800px) {
  .feature {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
  }
  .feature-right .feature-text {
    order: 2;
  }
  .feature-right .feature-image {
    order: 1;
  }
}

.feature-text h3 {
  font-size: 1.5rem;
  margin-bottom: var(--space-xs);
}

.feature-text p {
  font-size: 1.0625rem;
  max-width: 32em;
}

.feature-image img {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border);
}

/* === Privacy === */

.privacy {
  background: var(--bg-subtle);
  max-width: none !important;
  padding: var(--space-2xl) var(--space-lg);
}

.privacy h2,
.privacy-grid {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
}

.privacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-md);
}

.privacy-grid article {
  padding: var(--space-md);
  background: var(--bg-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.privacy-grid h3 {
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.privacy-grid p {
  margin: 0;
  font-size: 0.9375rem;
}

/* === Requirements === */

.requirements {
  max-width: var(--container-narrow) !important;
  padding-top: var(--space-2xl);
}

.req-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-xs);
}

.req-list li {
  padding: var(--space-md);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.req-list li::before {
  content: '✓';
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}

/* === FAQ === */

.faq {
  max-width: var(--container-narrow) !important;
}

.faq details {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-xs);
  overflow: hidden;
}

.faq summary {
  padding: var(--space-md);
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.0625rem;
  color: var(--text-primary);
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1;
  color: var(--accent);
  transition: transform 200ms ease;
  flex-shrink: 0;
}

.faq details[open] summary::after {
  transform: rotate(45deg);
}

.faq details > p,
.faq details > div {
  padding: 0 var(--space-md) var(--space-md);
  margin: 0;
}

.faq details > p {
  font-size: 1rem;
  line-height: 1.6;
}

/* === Footer === */

.site-footer {
  border-top: 1px solid var(--border);
  margin-top: var(--space-2xl);
  padding: var(--space-lg);
}

.footer-content {
  max-width: var(--container);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}

.footer-content p {
  margin: 0;
  font-size: 0.9375rem;
}

.footer-content nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  font-size: 0.9375rem;
}

@media (max-width: 640px) {
  .footer-content {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  .footer-content nav {
    gap: var(--space-sm);
  }
}

/* === Legal pages === */

body.legal .legal-main {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg) var(--space-2xl);
}

body.legal h1 {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  line-height: 1.2;
  margin: 0 0 var(--space-md);
}

body.legal .lede {
  font-size: 1.0625rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-lg);
}

body.legal .toc {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  margin-bottom: var(--space-xl);
}

body.legal .toc ol {
  margin: 0;
  padding-left: 1.5rem;
}

body.legal section {
  margin-top: var(--space-xl);
}

body.legal h2 {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.5rem;
}

body.legal h3 {
  font-size: 1.0625rem;
  margin-top: var(--space-md);
  margin-bottom: 0.5rem;
}

body.legal p,
body.legal ul {
  font-size: 1rem;
  line-height: 1.65;
}