/* ══════════════════════════════════════════════════════════════════════
   Log-It! — Official Static Site Design System
   Architecture: Pure Vanilla CSS3 (Custom Properties, Grid, Clamp)
   Capabilities: Dual Theme (Light/Dark), WCAG 2.1 AAA, RTL (Arabic), Print
   ══════════════════════════════════════════════════════════════════════ */

/* ─── Modern Design Tokens: Light Theme ──────────────────────────────── */
:root {
  color-scheme: light dark;

  /* Color Palette */
  --ink:          #0f172a;  /* Slate 900 */
  --ink-secondary:#334155;  /* Slate 700 */
  --muted:        #64748b;  /* Slate 500 */
  --blue:         #0284c7;  /* Sky 600 - Fresh Water */
  --blue-hover:   #0369a1;  /* Sky 700 */
  --blue-subtle:  #e0f2fe;  /* Sky 100 */
  --pale:         #f0f9ff;  /* Sky 50 - Card background */
  --line:         #cbd5e1;  /* Slate 300 */
  --line-light:   #e2e8f0;  /* Slate 200 */
  --white:        #ffffff;
  --bg:           #f8fafc;  /* Slate 50 */
  --card-bg:      #ffffff;
  --shadow-sm:    0 1px 3px rgba(15, 23, 42, 0.06);
  --shadow-md:    0 4px 14px rgba(15, 23, 42, 0.08);
  --shadow-lg:    0 12px 32px rgba(15, 23, 42, 0.10);

  /* Dimensions & Shapes */
  --max-width:    920px;
  --radius-xl:    1.5rem;
  --radius-lg:    1rem;
  --radius-md:    0.75rem;
  --radius-sm:    0.5rem;
  --transition:   180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Typography */
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

/* ─── Modern Design Tokens: Dark Theme ───────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --ink:          #f1f5f9;  /* Slate 100 */
    --ink-secondary:#cbd5e1;  /* Slate 300 */
    --muted:        #94a3b8;  /* Slate 400 */
    --blue:         #38bdf8;  /* Sky 400 */
    --blue-hover:   #7dd3fc;  /* Sky 300 */
    --blue-subtle:  #082f49;  /* Sky 950 */
    --pale:         #0f172a;  /* Slate 900 */
    --line:         #334155;  /* Slate 700 */
    --line-light:   #1e293b;  /* Slate 800 */
    --white:        #0f172a;
    --bg:           #020617;  /* Slate 950 */
    --card-bg:      #0b132b;
    --shadow-sm:    0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md:    0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg:    0 16px 40px rgba(0, 0, 0, 0.6);
  }
}

/* ─── Global Reset & Box Sizing ──────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--ink);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ─── Links & Accessibility ──────────────────────────────────────────── */
a {
  color: var(--blue);
  text-decoration: none;
  text-underline-offset: 0.22em;
  transition: color var(--transition), text-decoration-color var(--transition);
}

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

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

.skip {
  position: absolute;
  inset-inline-start: -9999px;
  inset-block-start: -9999px;
  z-index: 100;
}

.skip:focus {
  inset-inline-start: 1rem;
  inset-block-start: 1rem;
  background: var(--card-bg);
  color: var(--blue);
  border: 2px solid var(--blue);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.25rem;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}

/* ─── Sticky Header & Navigation ─────────────────────────────────────── */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 0.9rem clamp(1rem, 5vw, 3.5rem);
  background: var(--card-bg);
  border-bottom: 1px solid var(--line-light);
  box-shadow: var(--shadow-sm);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
}

.brand-icon {
  font-size: 1.35rem;
  line-height: 1;
}

.brand:hover {
  color: var(--blue);
  text-decoration: none;
}

nav {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  flex-wrap: wrap;
}

nav > a {
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  color: var(--ink-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

nav > a:hover {
  background: var(--pale);
  color: var(--blue);
  text-decoration: none;
}

nav > a[aria-current="page"] {
  background: var(--blue-subtle);
  color: var(--blue);
  font-weight: 700;
}

/* ─── Language Selector (Native Details/Summary) ─────────────────────── */
.language {
  position: relative;
}

details.language summary {
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  background: var(--card-bg);
  color: var(--ink);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  user-select: none;
  transition: border-color var(--transition), background var(--transition);
}

details.language summary::-webkit-details-marker {
  display: none;
}

details.language summary:hover {
  border-color: var(--blue);
  background: var(--pale);
}

details.language summary::after {
  content: "▾";
  font-size: 0.75rem;
  color: var(--muted);
  transition: transform var(--transition);
}

details.language[open] summary::after {
  transform: rotate(180deg);
}

.language div {
  position: absolute;
  inset-inline-end: 0;
  inset-block-start: calc(100% + 0.5rem);
  min-width: 14rem;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 0.5rem;
  box-shadow: var(--shadow-lg);
  z-index: 60;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.25rem;
}

.language div a {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.65rem;
  border-radius: var(--radius-sm);
  color: var(--ink);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  transition: background var(--transition), color var(--transition);
}

.language div a:hover,
.language div a:focus {
  background: var(--blue-subtle);
  color: var(--blue);
  text-decoration: none;
}

/* ─── Main Content Container ─────────────────────────────────────────── */
main {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: clamp(1.75rem, 5vw, 4rem) 1.25rem;
}

article {
  background: var(--card-bg);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-xl);
  padding: clamp(1.75rem, 5vw, 3.5rem);
  box-shadow: var(--shadow-md);
}

/* ─── Typography & Hero ──────────────────────────────────────────────── */
h1 {
  font-size: clamp(1.85rem, 5.5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.2rem, 2.8vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

p {
  color: var(--ink-secondary);
  margin-bottom: 1.25rem;
  font-size: 1.05rem;
  line-height: 1.7;
}

p.lead {
  font-size: 1.15rem;
  line-height: 1.75;
  color: var(--ink);
  max-width: 68ch;
}

/* ─── Rich Feature Cards Grid ────────────────────────────────────────── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin: 2.25rem 0 1.5rem;
  list-style: none;
}

.feature-card {
  background: var(--pale);
  border: 1px solid var(--line-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.35rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.feature-card:hover {
  transform: translateY(-2px);
  border-color: var(--blue);
  box-shadow: var(--shadow-md);
}

.feature-icon {
  font-size: 1.6rem;
  line-height: 1;
  margin-bottom: 0.25rem;
}

.feature-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.feature-desc {
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.55;
  margin: 0;
}

/* ─── Trust & Architecture Guarantees Grid ────────────────────────────── */
.trust-banner {
  margin-top: 2.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--blue-subtle);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}

.trust-banner h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  list-style: none;
}

.trust-item {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.9rem;
  color: var(--ink-secondary);
  line-height: 1.5;
}

.trust-item strong {
  color: var(--ink);
  display: block;
}

/* ─── Structured Content Sections (Legal Pages) ──────────────────────── */
.content-section {
  margin-top: 1.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-light);
}

.content-section:first-of-type {
  margin-top: 1.25rem;
  padding-top: 0;
  border-top: none;
}

.content-section h2 {
  font-size: 1.25rem;
  margin-top: 0;
  margin-bottom: 0.65rem;
  color: var(--ink);
}

.content-section p {
  margin-bottom: 0.85rem;
}

.content-section ul,
.content-section ol {
  margin: 0.5rem 0 1rem 1.25rem;
  color: var(--ink-secondary);
}

.content-section li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* ─── Callout Notice Cards ───────────────────────────────────────────── */
.callout-card {
  margin: 1.25rem 0;
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--pale);
}

.callout-card.warning {
  border-color: #f59e0b;
  background: #fffbeb;
  color: #92400e;
}

@media (prefers-color-scheme: dark) {
  .callout-card.warning {
    border-color: #b45309;
    background: #241402;
    color: #fde68a;
  }
}

.callout-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  color: inherit;
}

.callout-card p {
  font-size: 0.925rem;
  margin-bottom: 0;
  color: inherit;
  line-height: 1.6;
}

/* ─── Official Google Resource Cards ─────────────────────────────────── */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.85rem;
  margin: 1rem 0 1.25rem;
  list-style: none;
  padding: 0;
}

.resource-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line-light);
  border-radius: var(--radius-md);
  background: var(--card-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.resource-card:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow-sm);
}

.resource-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--ink);
  margin-bottom: 0.35rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.resource-desc {
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 0.75rem;
}

.resource-link {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--blue);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

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

/* ─── Status Badges ─────────────────────────────────────────────────── */
.status-pill {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.2rem 0.6rem;
  border-radius: 9999px;
  background: var(--blue-subtle);
  color: var(--blue);
  margin-bottom: 0.5rem;
}

.compliance-badge {
  display: block;
  margin-top: 0.75rem;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-md);
  background: var(--card-bg);
  border: 1px dashed var(--line);
  font-size: 0.825rem;
  color: var(--muted);
  line-height: 1.5;
}

.compliance-badge code {
  font-size: 0.8rem;
  padding: 0.1rem 0.35rem;
  border-radius: var(--radius-sm);
  background: var(--pale);
  color: var(--blue);
}

/* ─── Quick Facts Badge Box ──────────────────────────────────────────── */
.facts {
  margin-top: 2.5rem;
  padding: 1.5rem 1.75rem;
  background: var(--pale);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
}

.facts h2 {
  font-size: 0.85rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 0.75rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: none;
  padding: 0;
}

.facts ul {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 0.75rem;
}

.facts li {
  font-size: 0.9rem;
  color: var(--ink-secondary);
}

.facts li code {
  font-size: 0.85em;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0.15em 0.4em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

/* ─── Footer ─────────────────────────────────────────────────────────── */
footer {
  text-align: center;
  color: var(--muted);
  padding: 2.5rem 1.25rem 3.5rem;
  font-size: 0.9rem;
  border-top: 1px solid var(--line-light);
  background: var(--card-bg);
  margin-top: auto;
}

footer p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
}

footer a {
  color: var(--muted);
}

footer a:hover {
  color: var(--blue);
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

/* ─── Mobile Responsiveness (< 760px) ────────────────────────────────── */
@media (max-width: 760px) {
  header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
  }

  nav {
    width: 100%;
    justify-content: space-between;
    gap: 0.25rem;
  }

  nav > a,
  details.language summary {
    font-size: 0.825rem;
    padding: 0.45rem 0.6rem;
  }

  .language div {
    inset-inline-start: 0;
    inset-inline-end: auto;
    width: 100%;
    max-width: 18rem;
    grid-template-columns: 1fr;
  }

  article {
    padding: 1.5rem 1.25rem;
    border-radius: var(--radius-lg);
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .facts ul {
    grid-template-columns: 1fr;
  }
}

/* ─── RTL (Arabic) Overrides ─────────────────────────────────────────── */
[dir="rtl"] .language div {
  inset-inline-end: 0;
  inset-inline-start: auto;
}

/* ─── Print Styles ───────────────────────────────────────────────────── */
@media print {
  header, footer, .skip, .language, details {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
  }

  article {
    border: none !important;
    box-shadow: none !important;
    padding: 0 !important;
  }

  a[href^="http"]::after {
    content: " (" attr(href) ")";
    font-size: 0.85em;
    color: #444444;
  }
}

/* ─── Reduced Motion Support ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}