/* ==========================================================================
   LeakGuard — Shared Styles
   Loaded on every page, after variables.css. Page-specific rules live in
   css/pages/*.css and are loaded only where needed.
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--dark-bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 3px;
  border-radius: 4px;
}

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

.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); line-height: 1.05; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); line-height: 1.1; }
h3 { font-size: 1.25rem; line-height: 1.3; }

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

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 8px var(--accent-cyan);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.2s var(--ease), opacity 0.2s var(--ease), background 0.2s var(--ease);
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--primary-blue);
  color: #fff;
}
.btn-primary:hover { background: #1a8dff; }

.btn-secondary {
  background: transparent;
  border-color: var(--card-border-hi);
  color: var(--text-primary);
}
.btn-secondary:hover { border-color: var(--accent-cyan); color: var(--accent-cyan); }

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--card-border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
}

.nav-logo .mark {
  width: 30px;
  height: 30px;
  border-radius: 9px;
  background: linear-gradient(155deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.94rem;
  color: var(--text-secondary);
}

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

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

.nav-cta { display: flex; align-items: center; gap: 14px; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--card-border-hi);
  border-radius: var(--radius-sm);
  width: 40px;
  height: 40px;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
}

@media (max-width: 860px) {
  .nav-links { display: none; }
  .nav-cta .btn-secondary { display: none; }
  .nav-toggle { display: block; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #0b0b0d;
    border-bottom: 1px solid var(--card-border);
    padding: 20px 24px;
    gap: 18px;
  }
}

/* ---------- Sections ---------- */

.section { padding: 96px 0; }
.section-tight { padding: 64px 0; }
.section-header { max-width: 640px; margin: 0 0 48px; }
.section-header.center { margin-left: auto; margin-right: auto; text-align: center; }

.section-alt { background: var(--card-bg); }

/* ---------- Cards & grids ---------- */

.grid {
  display: grid;
  gap: 20px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 860px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.card:hover { border-color: var(--card-border-hi); }

.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0, 122, 255, 0.14);
  color: var(--primary-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.25rem;
}

.card h3 { margin-bottom: 8px; }
.card p { margin-bottom: 0; font-size: 0.96rem; }

/* ---------- Badges / pills ---------- */

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.badge.status-live { color: var(--success-green); border-color: rgba(52, 199, 89, 0.3); }
.badge.status-soon { color: var(--warning-orange); border-color: rgba(255, 149, 0, 0.3); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 120px 0 100px;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 60% at 50% -10%, var(--gradient-end) 0%, transparent 60%),
              linear-gradient(180deg, var(--gradient-start) 0%, var(--dark-bg) 70%);
}

.hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}

.hero p.lead {
  max-width: 620px;
  margin: 0 auto 34px;
  font-size: 1.15rem;
  color: var(--text-secondary);
}

.hero .cta-row { justify-content: center; margin-bottom: 20px; }

/* ---------- Signature component: Hash Split ----------
   Visualizes the app's core privacy mechanic: only a 5-character hash
   prefix ever leaves the device. Reused on the homepage hero and the
   privacy page. Keep this in sync with the copy in privacy.html. */

.hash-split {
  margin: 56px auto 0;
  max-width: 640px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: left;
}

.hash-split .hs-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.hash-split .hs-row {
  font-family: var(--font-mono);
  font-size: clamp(0.9rem, 2.6vw, 1.15rem);
  word-break: break-all;
  line-height: 1.6;
}

.hash-split .hs-sent {
  color: var(--dark-bg);
  background: var(--accent-cyan);
  padding: 2px 4px;
  border-radius: 4px;
}

.hash-split .hs-kept {
  color: var(--text-tertiary);
}

.hash-split .hs-footer {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--card-border);
  font-size: 0.82rem;
  flex-wrap: wrap;
}

.hash-split .hs-footer .sent-key { color: var(--accent-cyan); }
.hash-split .hs-footer .kept-key { color: var(--text-tertiary); }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--card-border);
  padding: 56px 0 40px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.footer-brand { max-width: 280px; }
.footer-brand .nav-logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; }

.footer-cols {
  display: flex;
  gap: 56px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 10px;
}
.footer-col a:hover { color: var(--text-primary); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 28px;
  border-top: 1px solid var(--card-border);
  font-size: 0.84rem;
  color: var(--text-tertiary);
}

/* ---------- Utility ---------- */

.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.small { font-size: 0.86rem; }
.mono { font-family: var(--font-mono); }