/* ============================================================
   base.css — styles shared by index.html and content-credentials.html
   Reset, CSS variables consumers, nav, hero badge, sections, FAQ,
   footer, error + reveal states. Load this BEFORE the page-specific
   stylesheet so page rules and media queries keep override priority.
   NOTE: CSS custom properties (:root) live in each page's own stylesheet
   because the two pages define different variable sets.
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--amber);
  color: #16140f;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius);
  text-decoration: none;
  transition: top 0.1s;
}

.skip-link:focus { top: 8px; }

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

button:focus-visible, a:focus-visible { border-radius: var(--radius); }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ─── NAV ─── */
nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(22,20,15,0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 3px solid var(--amber);
  border-bottom: 1px solid var(--border);
  padding: 0 max(24px, calc(50% - 580px));
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: -0.02em;
}

.nav-logo span { font-style: italic; font-weight: 400; color: var(--amber); }

.nav-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  font-size: 0.825rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-light);
  text-decoration: none;
  transition: color 0.2s;
}

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

.nav-github {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: 0.825rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--border-dark);
  padding: 6px 14px;
  border-radius: var(--radius);
  transition: background 0.2s, border-color 0.2s;
}

.nav-github:hover { background: var(--paper); border-color: var(--amber); }

nav.scrolled {
  border-bottom-color: rgba(44,42,34,0.8);
  box-shadow: 0 1px 0 rgba(0,0,0,0.3);
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 8px;
  min-width: 44px;
  min-height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  border-radius: 1px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }

.nav-hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; transform: scaleX(0); }

.nav-hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav {
  display: none;
  padding: 4px max(24px, calc(50% - 580px)) 10px;
  border-top: 1px solid var(--border);
  background: rgba(22,20,15,0.98);
}

.mobile-nav.is-open { display: block; }

.mobile-nav a {
  display: block;
  padding: 11px 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-light);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

.mobile-nav a:last-child { border-bottom: none; }

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

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--amber);
  background: var(--amber-light);
  border: 1px solid var(--amber-border);
  padding: 4px 10px;
  border-radius: 99px;
  margin-bottom: 24px;
}

.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--amber);
  animation: pulse-dot 2.4s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.75); }
}

h1 em {
  font-style: italic;
  font-weight: 400;
  color: var(--amber);
}

.drop-zone:hover, .drop-zone.drag-over {
  border-color: var(--amber);
  background: rgba(217,119,87,0.07);
}

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
}

.drop-zone:hover .drop-icon, .drop-zone.drag-over .drop-icon {
  transform: translateY(-3px);
  background: rgba(217,119,87,0.12);
  border-color: var(--amber-border);
}

.drop-title {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

/* Spinner */
@keyframes spin { to { transform: rotate(360deg); } }

.btn-reset {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 10px;
  background: transparent;
  color: var(--ink-light);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 400;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  cursor: pointer;
  margin-top: 8px;
  transition: background 0.2s, color 0.2s;
}

.btn-reset:hover { background: var(--paper); color: var(--ink); }

/* ─── SECTIONS SHARED ─── */
section {
  padding: 88px max(24px, calc(50% - 580px));
}

.section-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-bottom: 14px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3.8vw, 3.2rem);
  font-weight: 700;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 16px;
  text-wrap: balance;
}

.section-title em { font-style: italic; font-weight: 400; color: var(--amber); }

/* ─── FAQ ─── */
.faq-section { background: var(--off-white); border-top: 1px solid var(--border); }

.faq-layout {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 80px;
  align-items: start;
}

.faq-header { position: sticky; top: 80px; padding-bottom: 24px; }

.faq-header .section-title { margin-bottom: 12px; }

.faq-header .section-sub { font-size: 0.9rem; }

.faq-list { margin-top: 0; max-width: none; }

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

.faq-question:hover { color: var(--amber); }

.faq-icon {
  flex-shrink: 0;
  width: 18px; height: 18px;
  border: 1px solid var(--border-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 400;
  color: var(--ink-light);
  transition: transform 0.2s;
}

.faq-item.open .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0;
  font-size: 0.875rem;
  color: var(--ink-light);
  line-height: 1.7;
  font-weight: 300;
  max-width: 560px;
  transition: max-height 0.28s ease-out, padding 0.28s ease-out;
}

.faq-item.open .faq-answer {
  max-height: 320px;
  padding: 0 0 18px;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
}

.footer-logo span { font-style: italic; font-weight: 400; color: var(--amber); }

.footer-copy {
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.78rem;
  color: var(--ink-faint);
  text-decoration: none;
}

.footer-links a:hover { color: var(--ink); }

.error-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--red-light);
  border: 1px solid rgba(248,113,113,0.25);
  border-radius: var(--radius-lg);
  margin-bottom: 8px;
}

.error-icon { flex-shrink: 0; color: var(--red); margin-top: 1px; }

.error-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 3px;
}

.error-desc {
  font-size: 0.8rem;
  color: var(--ink-light);
  line-height: 1.5;
}

[data-reveal][data-delay="1"].is-hidden { transition-delay: 0.08s; }

[data-reveal][data-delay="2"].is-hidden { transition-delay: 0.16s; }

[data-reveal][data-delay="3"].is-hidden { transition-delay: 0.24s; }