/* ==========================================================================
   RhythmWise
   rhythmwise.org
   Shared stylesheet for all pages.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand */
  --color-primary: #8E6C88;
  --color-secondary: #B5808E;
  --gradient-brand: linear-gradient(135deg, #8E6C88, #B5808E);

  /* Surfaces & text (light theme) */
  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-text: #2D2D2D;
  --color-muted: #5A5A5A;
  --color-border: #E5E5E5;
  --color-on-brand: #FFFFFF;

  /* Typography */
  --font-system: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-size-base: 1rem;       /* 16px */
  --line-height-base: 1.6;

  /* Spacing scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;

  /* Layout */
  --max-width: 720px;
  --radius: 6px;
  --transition: 0.15s ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1A1A1A;
    --color-surface: #242424;
    --color-text: #EDEDED;
    --color-muted: #B0B0B0;
    --color-border: #3A3A3A;
  }
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-system);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1,
h2,
h3,
h4 {
  margin: 0 0 var(--space-4);
  line-height: 1.25;
  font-weight: 700;
  color: var(--color-text);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
  margin-top: var(--space-7);
}

h3 {
  font-size: 1.2rem;
  margin-top: var(--space-5);
}

p {
  margin: 0 0 var(--space-4);
}

ul,
ol {
  margin: 0 0 var(--space-4);
  padding-left: var(--space-5);
}

li + li {
  margin-top: var(--space-2);
}

strong {
  font-weight: 600;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: color var(--transition);
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

/* --------------------------------------------------------------------------
   4. Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  padding-left: var(--space-5);
  padding-right: var(--space-5);
}

.content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-7) var(--space-5);
}

.content > section + section {
  margin-top: var(--space-6);
}

/* Skip-to-content link for keyboard users */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: var(--space-3) var(--space-4);
  background: var(--color-primary);
  color: var(--color-on-brand);
  text-decoration: none;
  border-radius: var(--radius);
  z-index: 100;
}

.skip-link:focus {
  left: var(--space-3);
  top: var(--space-3);
}

/* --------------------------------------------------------------------------
   5. Site header & primary nav
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-3) var(--space-5);
}

.site-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-3) 0;
}

.site-title:hover {
  color: var(--color-secondary);
}

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav li + li {
  margin-top: 0;
}

.site-nav a {
  display: inline-block;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  text-decoration: none;
  border-radius: var(--radius);
  transition: background-color var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

/* --------------------------------------------------------------------------
   6. Hero (landing page only)
   -------------------------------------------------------------------------- */
.hero {
  background: var(--gradient-brand);
  color: var(--color-on-brand);
  padding: var(--space-8) var(--space-5);
  text-align: center;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  color: var(--color-on-brand);
  font-size: 2.75rem;
  margin-bottom: var(--space-3);
}

.hero .tagline {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: var(--space-5);
  opacity: 0.95;
}

.hero p {
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* --------------------------------------------------------------------------
   7. Components
   -------------------------------------------------------------------------- */
.feature-list,
.privacy-list,
.link-list {
  list-style: none;
  padding-left: 0;
}

.feature-list li,
.privacy-list li {
  padding-left: var(--space-5);
  position: relative;
}

.feature-list li::before,
.privacy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--gradient-brand);
}

.link-list li {
  padding: var(--space-1) 0;
}

.muted {
  color: var(--color-muted);
}

.effective-date {
  color: var(--color-muted);
  margin-bottom: var(--space-6);
}

/* FAQ blocks (support page) */
.faq h3 {
  margin-top: var(--space-6);
}

/* Contact list (privacy, terms, support) */
.contact-list {
  list-style: none;
  padding-left: 0;
}

.contact-list li {
  padding: var(--space-1) 0;
}

/* --------------------------------------------------------------------------
   8. Site footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--color-border);
  background-color: var(--color-surface);
  margin-top: var(--space-8);
  padding: var(--space-6) var(--space-5);
  color: var(--color-muted);
  font-size: 0.9375rem;
  text-align: center;
}

.site-footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.site-footer p {
  margin-bottom: var(--space-2);
}

.site-footer ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2) var(--space-4);
  margin: var(--space-4) 0 0;
  padding: 0;
  list-style: none;
}

.site-footer li + li {
  margin-top: 0;
}

.site-footer a {
  color: var(--color-muted);
}

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

/* --------------------------------------------------------------------------
   9. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 600px) {
  .site-nav {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-1);
  }

  .site-nav ul {
    width: 100%;
  }

  .site-nav a {
    display: block;
    padding: var(--space-3) var(--space-3);
  }

  .hero {
    padding: var(--space-7) var(--space-4);
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .tagline {
    font-size: 1.05rem;
  }

  .content {
    padding: var(--space-6) var(--space-4);
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.35rem;
  }
}