/* Instaday — Calm Tech landing styles
 * - Single CSS file, no frameworks
 * - System fonts only (privacy + perf, no Google Fonts)
 * - Dark mode via prefers-color-scheme
 * - Generous spacing, low contrast, slow defaults
 * - Mobile-first, responsive via flexbox
 */

:root {
  --bg: #f6f4ef;
  --surface: #fffcf7;
  --text: #1a1c1b;
  --text-soft: #5a5d5c;
  --accent: #1f6b6b;
  --accent-soft: #d8e8e8;
  --border: rgba(0, 0, 0, 0.1);
  --max: 720px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111312;
    --surface: #1a1d1c;
    --text: #e8eae6;
    --text-soft: #9a9d9b;
    --accent: #6fbfbf;
    --accent-soft: #1f3030;
    --border: rgba(255, 255, 255, 0.12);
  }
}

* {
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto,
    'Helvetica Neue', Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px 24px 96px;
}

header.site {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 24px 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

header.site .logo {
  font-weight: 600;
  font-size: 20px;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.3px;
}

header.site .logo::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  margin-right: 10px;
  vertical-align: 1px;
}

header.site nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 15px;
  margin-left: 24px;
}

header.site nav a:hover {
  color: var(--accent);
}

h1 {
  font-size: 40px;
  line-height: 1.15;
  font-weight: 300;
  letter-spacing: -1px;
  margin: 48px 0 16px;
}

h2 {
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.3px;
  margin: 56px 0 12px;
}

h3 {
  font-size: 18px;
  font-weight: 500;
  margin: 32px 0 8px;
}

p {
  margin: 0 0 16px;
  color: var(--text);
}

.lead {
  font-size: 20px;
  color: var(--text-soft);
  line-height: 1.5;
  margin-bottom: 32px;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 200ms;
}

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

.cta {
  display: inline-block;
  padding: 14px 24px;
  background: var(--accent);
  color: var(--bg);
  border-radius: 8px;
  font-weight: 500;
  font-size: 16px;
  text-decoration: none;
  margin-top: 8px;
}

.cta:hover {
  border-bottom-color: transparent;
  filter: brightness(1.1);
}

.cta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 24px 0 32px;
}

.badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  text-transform: uppercase;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  margin: 16px 0;
}

.card h3 {
  margin-top: 0;
}

.principle-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 24px 0 0;
}

@media (min-width: 640px) {
  .principle-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.principle {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.principle .label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--accent);
  margin-bottom: 8px;
  font-weight: 600;
}

.principle h3 {
  margin: 0 0 6px;
  font-size: 17px;
}

.principle p {
  font-size: 14px;
  color: var(--text-soft);
  margin: 0;
}

.flow {
  list-style: none;
  padding: 0;
  margin: 24px 0 0;
  counter-reset: step;
}

.flow li {
  counter-increment: step;
  padding: 16px 0 16px 56px;
  position: relative;
  border-top: 1px solid var(--border);
}

.flow li:first-child {
  border-top: none;
}

.flow li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-weight: 600;
  font-size: 15px;
}

.flow li strong {
  display: block;
  margin-bottom: 4px;
}

.flow li span {
  color: var(--text-soft);
  font-size: 15px;
}

footer.site {
  max-width: var(--max);
  margin: 64px auto 32px;
  padding: 32px 24px 0;
  border-top: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-soft);
}

footer.site .row {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

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

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

footer.site .copyright {
  font-size: 13px;
}

/* Legal pages */
.legal-doc {
  max-width: var(--max);
}

.legal-doc h2 {
  margin-top: 40px;
}

.legal-doc h3 {
  margin-top: 28px;
}

.legal-doc ul {
  padding-left: 24px;
}

.legal-doc li {
  margin-bottom: 8px;
}

.legal-doc .meta {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--text-soft);
  margin: 24px 0 32px;
}

.legal-doc .draft-warning {
  border: 1px solid var(--accent);
  background: var(--accent-soft);
  border-radius: 12px;
  padding: 16px 20px;
  font-size: 14px;
  color: var(--accent);
  margin: 24px 0;
}

/* Transparency report viewer */
#transparency-report {
  font-size: 15px;
}

#transparency-report .stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
  margin: 16px 0 24px;
}

#transparency-report .stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

#transparency-report .stat .label {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-soft);
  margin-bottom: 6px;
}

#transparency-report .stat .value {
  font-size: 24px;
  font-weight: 500;
  color: var(--text);
}

#transparency-report pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.5;
}

#transparency-report .system {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 20px;
  margin: 12px 0;
}

#transparency-report .system strong {
  display: block;
  margin-bottom: 4px;
}

#transparency-report .system .field {
  font-size: 13px;
  color: var(--text-soft);
  margin-top: 6px;
}

.loading {
  color: var(--text-soft);
  font-style: italic;
}

.error {
  color: #b54040;
  background: #faeaea;
  border-radius: 8px;
  padding: 12px 16px;
}

@media (prefers-color-scheme: dark) {
  .error {
    color: #ff8a8a;
    background: #3a1a1a;
  }
}