/* RecallMate website — marketing + technical */

:root {
  --bg: #0d1117;
  --bg-card: #161b22;
  --bg-elevated: #21262d;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --accent: #3fb950;
  --accent-dim: #238636;
  --accent-blue: #58a6ff;
  --border: #30363d;
  --radius: 12px;
  --radius-sm: 8px;
  --font-sans: "DM Sans", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --space: 1.5rem;
  --wrap: min(90vw, 960px);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space);
  padding-right: var(--space);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 17, 23, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 1.125rem;
}

.logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
}

.nav {
  display: flex;
  gap: 1.5rem;
}

.nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.15s ease;
}

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

/* Hero */
.hero {
  padding: 4rem 0 4.5rem;
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg) 70%);
}

.hero-wrap {
  text-align: center;
}

.hero-icon {
  display: block;
  margin: 0 auto 1.5rem;
  border-radius: 26px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}

.hero h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

.hero-lead {
  margin: 0 0 2rem;
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 42ch;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 500;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: background 0.15s ease, color 0.15s ease;
  cursor: pointer;
}

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

.btn-primary:hover {
  background: var(--accent-dim);
}

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

.btn-secondary:hover {
  background: var(--border);
  color: var(--text);
}

/* Sections */
.section {
  padding: 4rem 0;
}

.section h2 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text);
}

.section-lead {
  margin: 0 0 2rem;
  color: var(--text-muted);
  font-size: 1.0625rem;
}

/* Features */
.features {
  border-top: 1px solid var(--border);
}

.grid {
  display: grid;
  gap: 1.5rem;
}

.grid-three {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-bottom: 2rem;
}

.grid-two {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
}

.card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.feature-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.feature-list li {
  font-size: 0.9375rem;
  color: var(--text-muted);
  padding-left: 1.25rem;
  position: relative;
}

.feature-list li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.feature-list strong {
  color: var(--text);
}

/* Technical */
.technical {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.tech-block h3 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.tech-table td {
  padding: 0.35rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}

.tech-table td:first-child {
  color: var(--text-muted);
  width: 7rem;
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-list {
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.tech-list li {
  padding: 0.25rem 0;
}

.tech-arch {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.tech-arch p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* Security */
.security {
  border-top: 1px solid var(--border);
}

/* Build */
.build {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
}

.code-block {
  margin: 0 0 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow-x: auto;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text);
  white-space: pre;
}

.build p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
}

.build code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.15em 0.4em;
  background: var(--bg-elevated);
  border-radius: 4px;
  color: var(--accent-blue);
}

.link-arrow {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
}

.link-arrow:hover {
  text-decoration: underline;
}

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

.site-footer p {
  margin: 0.5rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

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

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

.footer-legal {
  margin-top: 1.5rem !important;
  font-size: 0.8125rem !important;
  opacity: 0.8;
}

@media (max-width: 640px) {
  .nav {
    gap: 1rem;
  }
  .hero {
    padding: 3rem 0 3.5rem;
  }
  .section {
    padding: 3rem 0;
  }
}