/* AhaDaily — Apple Liquid Glass Web Styles
   Design tokens from lib/constants.ts */

:root {
  --color-bg: #FFFFFF;
  --color-bg-secondary: #f5f5f5;
  --color-text: #000000;
  --color-text-secondary: rgba(60,60,67,0.60);
  --color-text-tertiary: rgba(60,60,67,0.30);
  --color-accent: #000000;
  --color-divider: rgba(0,0,0,0.06);
  --color-danger: #B91C1C;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 680px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Layout ─────────────────────────────────────────── */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

/* ── Header ─────────────────────────────────────────── */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
  border-bottom: 1px solid var(--color-divider);
}

.site-logo {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.lang-switch {
  display: flex;
  gap: 2px;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-sm);
  padding: 2px;
}

.lang-switch a {
  display: block;
  padding: 0.3rem 0.7rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-decoration: none;
  border-radius: 6px;
  transition: all 0.15s ease;
}

.lang-switch a.active {
  background: var(--color-accent);
  color: #fff;
}

.lang-switch a:hover:not(.active) {
  color: var(--color-text);
}

/* ── Typography ─────────────────────────────────────── */
h1 {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

p {
  margin-bottom: 1rem;
  color: var(--color-text);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.subtitle {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

/* ── Links ──────────────────────────────────────────── */
a {
  color: rgba(60,60,67,0.78);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

/* ── Lists ──────────────────────────────────────────── */
ul, ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  font-size: 0.9375rem;
}

li {
  margin-bottom: 0.4rem;
}

/* ── Info / Warning boxes ───────────────────────────── */
.info-box {
  background: var(--color-bg-secondary);
  border-left: 3px solid var(--color-text-tertiary);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
}

.info-box p {
  margin-bottom: 0.5rem;
  font-size: 0.875rem;
}

.info-box p:last-child {
  margin-bottom: 0;
}

.warning-box {
  background: rgba(185,28,28,0.04);
  border-left: 3px solid var(--color-danger);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
}

.warning-box p {
  margin-bottom: 0;
  font-size: 0.875rem;
}

/* ── Table ──────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0 1.5rem;
  font-size: 0.875rem;
}

th, td {
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--color-divider);
}

th {
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Footer ─────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-top: 2rem;
  margin-top: 3rem;
  color: var(--color-text-tertiary);
  font-size: 0.8125rem;
  text-align: center;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 1rem;
  justify-content: center;
}

.footer-links a {
  color: rgba(60,60,67,0.78);
  font-size: 0.8125rem;
}

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

/* ── Landing page hero ──────────────────────────────── */
.hero {
  text-align: center;
  padding: 8rem 1.5rem 4rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.25rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.04em;
}

.hero .tagline {
  font-size: 1.0625rem;
  color: var(--color-text-secondary);
  margin-bottom: 2.5rem;
  line-height: 1.6;
}

.hero-badge {
  display: inline-block;
  background: var(--color-bg-secondary);
  color: var(--color-text-secondary);
  padding: 0.5rem 1.25rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 3rem;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.nav-links a {
  color: rgba(60,60,67,0.78);
  font-size: 0.8125rem;
  font-weight: 500;
}

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

/* ── Steps list ─────────────────────────────────────── */
.steps {
  counter-reset: step;
  list-style: none;
  padding-left: 0;
}

.steps li {
  counter-increment: step;
  padding-left: 2.5rem;
  position: relative;
  margin-bottom: 1rem;
  font-size: 0.9375rem;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 1.5rem;
  height: 1.5rem;
  background: var(--color-text);
  color: #fff;
  border-radius: 50%;
  font-size: 0.75rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 480px) {
  h1 { font-size: 1.5rem; }
  h2 { font-size: 1.125rem; }
  .hero { padding: 5rem 1.25rem 3rem; }
  .hero h1 { font-size: 1.75rem; }
  .container { padding: 1.5rem 1rem 3rem; }
  .site-header { padding: 1rem 1rem; }
  table { font-size: 0.8rem; }
  th, td { padding: 0.5rem 0.6rem; }
}