/* ============================================================
   SheetOps Lab — components.css
   Reusable UI components shared across all pages:
   header, footer, buttons, cards, data tables, FAQ, notices.
   ============================================================ */

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 251, 248, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--grid);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.01em;
}

.brand:hover {
  color: var(--ink);
}

.brand__mark {
  width: 26px;
  height: 26px;
  flex: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 1.75rem);
}

.site-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a[aria-current="page"] {
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--grid-strong);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}

@media (max-width: 640px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--grid);
    padding: 0.5rem 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 0.8rem clamp(1.25rem, 4vw, 2rem);
  }

  .site-nav a[aria-current="page"] {
    border-bottom: none;
    background: var(--accent-tint);
  }
}

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

.site-footer {
  border-top: 1px solid var(--grid);
  background: var(--surface);
  padding-block: 2.5rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  justify-content: space-between;
  align-items: center;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

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

.site-footer a:hover {
  color: var(--ink);
  text-decoration: underline;
}

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

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  text-align: center;
  padding: 0.8rem 1.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease,
    border-color 0.15s ease;
}

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

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

.btn--secondary {
  background: transparent;
  color: var(--accent-dark);
  border-color: var(--grid-strong);
}

.btn--secondary:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

.btn-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

/* ---------- Cards ---------- */

.card-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  margin-top: 2rem;
}

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

.card h3 {
  margin-bottom: 0.4em;
}

.card p {
  color: var(--ink-soft);
  font-size: 0.98rem;
  margin-bottom: 0;
}

/* ---------- Check / cross lists ---------- */

.list-plain {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0;
}

.list-plain li {
  padding: 0.45rem 0 0.45rem 1.9rem;
  position: relative;
}

.list-check li::before,
.list-cross li::before {
  font-family: var(--font-mono);
  position: absolute;
  left: 0;
  top: 0.45rem;
  font-weight: 600;
}

.list-check li::before {
  content: "✓";
  color: var(--accent);
}

.list-cross li::before {
  content: "✕";
  color: var(--flag);
}

/* ---------- Data tables (CSV look) ---------- */

.sheet {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.4;
  border: 1px solid var(--grid-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.sheet caption {
  caption-side: top;
  text-align: left;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding-bottom: 0.6rem;
  color: var(--ink);
}

.sheet th,
.sheet td {
  border: 1px solid var(--grid);
  padding: 0.45rem 0.6rem;
  text-align: left;
  white-space: nowrap;
}

.sheet thead th {
  background: var(--accent-tint);
  color: var(--accent-dark);
  font-weight: 600;
}

.sheet td.is-flagged {
  background: var(--flag-tint);
  color: var(--flag);
}

.sheet td.is-good {
  background: var(--accent-tint);
  color: var(--accent-dark);
}

.sheet-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

/* ---------- FAQ ---------- */

.faq {
  margin-top: 1.5rem;
  border-top: 1px solid var(--grid);
}

.faq details {
  border-bottom: 1px solid var(--grid);
}

.faq summary {
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  padding: 1.1rem 2rem 1.1rem 0;
  list-style: none;
  position: relative;
}

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

.faq summary::after {
  content: "+";
  font-family: var(--font-mono);
  position: absolute;
  right: 0.25rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent);
  font-size: 1.2rem;
}

.faq details[open] summary::after {
  content: "−";
}

.faq details p {
  color: var(--ink-soft);
  padding-bottom: 1.1rem;
  max-width: 65ch;
}

/* ---------- Notices ---------- */

.notice {
  background: var(--surface);
  border: 1px solid var(--grid-strong);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.3rem;
  font-size: 0.95rem;
  color: var(--ink-soft);
}

/* ---------- Prose (legal / long-form pages) ---------- */

.prose h2 {
  margin-top: 2.2em;
  font-size: 1.35rem;
}

.prose ul {
  padding-left: 1.2rem;
}

.prose li {
  margin-bottom: 0.4em;
}