/* ============================================================
   Bare website — styles.css
   Vanilla CSS, no frameworks, no external dependencies.
   ============================================================ */

/* ----- Custom properties ----- */
:root {
  --bg:      #ffffff;
  --surface: #f5f5f5;
  --text:    #1a1a1a;
  --accent:  #3a7bd5;
  --muted:   #666666;
  --border:  #e0e0e0;
  --radius:  8px;
  --max-w:   960px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg:      #1a1a1a;
    --surface: #242424;
    --text:    #e8e8e8;
    --accent:  #6fa3ef;
    --muted:   #999999;
    --border:  #333333;
  }
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

/* ----- Container ----- */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ----- Typography ----- */
h1, h2, h3 {
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

p {
  color: var(--text);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

p code {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 0.1em 0.4em;
  border-radius: 4px;
  font-size: 0.88em;
}

pre {
  background: #0d1117;
  color: #e6edf3;
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  font-size: 0.875rem;
  line-height: 1.6;
  margin-top: 1.25rem;
}

pre code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.section-lead {
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 640px;
  margin-bottom: 0.5rem;
}

/* ----- Buttons ----- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none !important;
  transition: opacity 0.15s ease;
  border: none;
}

.btn:hover {
  opacity: 0.83;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

/* ----- Hero ----- */
.hero {
  padding: 6rem 0 5rem;
  text-align: center;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.logo-link {
  display: inline-block;
  margin-bottom: 2rem;
}

.logo {
  display: block;
}

.hero h1 {
  margin-bottom: 1.25rem;
}

.tagline {
  font-size: 1.175rem;
  color: var(--muted);
  max-width: 560px;
  margin: 0 auto 2.5rem;
}

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

.hero-note {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ----- Features ----- */
.features {
  padding: 5rem 0;
  background: var(--surface);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-top: 2.5rem;
}

.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.feature-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 1rem;
}

/* ----- Protocols ----- */
.protocols {
  padding: 5rem 0;
  background: var(--bg);
}

.protocol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.protocol-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  text-align: center;
}

.protocol-icon {
  font-size: 2rem;
  margin-bottom: 0.25rem;
}

.protocol-card strong {
  font-size: 0.95rem;
}

.protocol-card code {
  font-size: 0.82rem;
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.2em 0.5em;
  border-radius: 4px;
  color: var(--accent);
}

/* ----- How it works ----- */
.how-it-works {
  padding: 5rem 0;
  background: var(--surface);
}

.flow {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin: 3rem 0 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.flow-step {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem 2rem;
  text-align: center;
  flex: 1;
  min-width: 170px;
  max-width: 240px;
}

.flow-number {
  display: inline-flex;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 0.75rem;
}

.flow-arrow {
  font-size: 1.5rem;
  color: var(--muted);
  flex-shrink: 0;
}

.how-detail {
  max-width: 640px;
  margin: 0 auto;
  color: var(--muted);
  text-align: center;
  font-size: 0.975rem;
}

/* ----- Privacy table ----- */
.privacy {
  padding: 5rem 0;
  background: var(--bg);
}

.table-wrapper {
  overflow-x: auto;
  margin-top: 2rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.85rem 1.25rem;
  border-bottom: 1px solid var(--border);
}

tbody tr:last-child td {
  border-bottom: none;
}

th {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: var(--surface);
}

.badge {
  display: inline-block;
  padding: 0.2em 0.65em;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge-no {
  background: #fee2e2;
  color: #991b1b;
}

.badge-warn {
  background: #fef3c7;
  color: #92400e;
}

@media (prefers-color-scheme: dark) {
  .badge-no  { background: #3f1515; color: #fca5a5; }
  .badge-warn { background: #3a2708; color: #fcd34d; }
}

/* ----- Getting started ----- */
.getting-started {
  padding: 5rem 0;
  background: var(--surface);
}

.start-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2.5rem;
}

.start-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem;
}

.start-card h3 {
  margin-bottom: 0.75rem;
}

.start-card > p {
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

/* ----- Community ----- */
.community {
  padding: 5rem 0;
  background: var(--bg);
}

.community > .container > p {
  color: var(--muted);
  margin-top: 0.5rem;
}

.community-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2rem 0;
}

.community-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: border-color 0.15s ease;
  text-decoration: none !important;
}

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

.built-with {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.built-with > p {
  color: var(--muted);
  margin-bottom: 1rem;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tech-tag {
  display: inline-block;
  padding: 0.25em 0.8em;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--muted);
}

/* ----- Footer ----- */
.site-footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 3rem 0;
  text-align: center;
}

.site-footer p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.site-footer a {
  color: var(--accent);
  text-decoration: none;
}

.site-footer a:hover {
  text-decoration: underline;
}

.footer-note {
  font-size: 0.82rem !important;
}

.footer-quote {
  margin-top: 1rem !important;
  font-style: italic;
  color: var(--muted);
}

/* ----- Responsive ----- */
@media (max-width: 640px) {
  .flow-arrow {
    display: none;
  }

  .flow-step {
    max-width: 100%;
  }

  .hero {
    padding: 4rem 0 3.5rem;
  }

  .features,
  .protocols,
  .how-it-works,
  .privacy,
  .getting-started,
  .community {
    padding: 3.5rem 0;
  }
}