/* ══════════════════════════════════════════════════════════
   Khalid Alnujaidi — Shared Project Page Styles
   ══════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --ink: #111010;
  --ink-muted: #6b6760;
  --ink-faint: #b8b4ae;
  --paper: #f9f7f4;
  --paper-alt: #f2efe9;
  --rule: #e2ddd7;
  --link: #2a5caa;
  --serif: 'DM Serif Display', Georgia, serif;
  --sans: 'DM Sans', system-ui, sans-serif;
}
html { scroll-behavior: smooth; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }

/* ── Top bar ── */
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: var(--paper);
  border-bottom: 1px solid var(--rule);
  padding: 1rem 3rem;
  display: flex; align-items: center; justify-content: space-between;
}
.topbar-back {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 12px; color: var(--ink-muted);
  transition: color 0.2s;
}
.topbar-back:hover { color: var(--ink); }
.topbar-back .arrow { font-size: 13px; transition: transform 0.2s; }
.topbar-back:hover .arrow { transform: translateX(-2px); }
.topbar-logo {
  width: 18px; height: 18px; background: var(--ink);
  border-radius: 2px; display: block;
}

/* ── Hero ── */
.hero {
  max-width: 780px; margin: 0 auto;
  padding: 5rem 3rem 3.5rem;
  border-bottom: 1px solid var(--rule);
}
.hero-label {
  display: flex; align-items: center; gap: 0.75rem;
  font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-faint);
  margin-bottom: 1.5rem; flex-wrap: wrap;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(40px, 6vw, 64px);
  line-height: 1.02; letter-spacing: -0.02em;
  color: var(--ink); margin-bottom: 1.25rem;
}
.hero-subtitle {
  font-size: 17px; color: var(--ink-muted);
  line-height: 1.7; max-width: 560px; font-weight: 300;
  margin-bottom: 2rem;
}

/* ── Badges ── */
.badge-pill {
  display: inline-flex; align-items: center; gap: 5px;
  border-radius: 2px; padding: 3px 9px;
  font-size: 9px; letter-spacing: 0.1em;
}
.badge-blue { background: #e8f0fb; border: 1px solid #b5cef0; color: #1a4a8a; }
.badge-green { background: #e6f4ed; border: 1px solid #a8d8bc; color: #1a5c38; }
.badge-gold { background: #fdf3e3; border: 1px solid #f0d89a; color: #8a6a1a; }
.dot { width: 5px; height: 5px; border-radius: 50%; }
.badge-blue .dot { background: #2a5caa; }
.badge-green .dot { background: #2a7a4b; }
.badge-gold .dot { background: #c8911a; }

.spotlight-badge {
  display: inline-flex; align-items: center; gap: 5px;
  background: #fdf3e3; border: 1px solid #f0d89a;
  border-radius: 2px; padding: 3px 9px;
  font-size: 9px; letter-spacing: 0.1em; color: #8a6a1a;
}
.spotlight-dot { width: 5px; height: 5px; border-radius: 50%; background: #c8911a; }

/* ── Confidential notice ── */
.confidential-notice {
  display: flex; align-items: flex-start; gap: 0.6rem;
  font-size: 12px; color: var(--ink-faint); line-height: 1.6;
  padding: 0.85rem 1rem;
  background: var(--paper-alt); border: 1px solid var(--rule);
  border-radius: 3px;
}

/* ── CTA row ── */
.cta-row { display: flex; gap: 0.75rem; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; letter-spacing: 0.06em;
  text-transform: uppercase; padding: 9px 18px;
  border-radius: 2px; border: 1px solid;
  transition: background 0.2s, color 0.2s; cursor: pointer;
  font-family: var(--sans);
}
.btn-primary { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-primary:hover { background: #2a2a2a; }
.btn-secondary { background: transparent; color: var(--ink-muted); border-color: var(--rule); }
.btn-secondary:hover { background: var(--paper-alt); color: var(--ink); }

/* ── Meta strip ── */
.meta-strip {
  max-width: 780px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-bottom: 1px solid var(--rule);
}
.meta-cell {
  padding: 1.5rem 3rem;
  border-right: 1px solid var(--rule);
}
.meta-cell:first-child { padding-left: 3rem; }
.meta-cell:last-child { border-right: none; }
.meta-label { font-size: 9px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 0.3rem; }
.meta-value { font-size: 13px; color: var(--ink); font-weight: 400; }

/* ── Content ── */
.content {
  max-width: 780px; margin: 0 auto;
  padding: 0 3rem;
}
.content-section { padding: 3rem 0; border-bottom: 1px solid var(--rule); }
.content-section:last-child { border-bottom: none; }
.content-section h2 {
  font-size: 10px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--ink-faint);
  margin-bottom: 1.5rem;
}

.prose {
  font-size: 15px; color: var(--ink-muted);
  line-height: 1.8; font-weight: 300;
  max-width: 600px;
}
.prose p { margin-bottom: 1rem; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--ink); font-weight: 500; }
.prose a { color: var(--link); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.prose a:hover { border-bottom-color: var(--link); }

/* ── Feature grid ── */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: var(--rule); border: 1px solid var(--rule); border-radius: 3px; overflow: hidden; }
.feature-cell { background: var(--paper); padding: 1.25rem 1.5rem; }
.feature-icon { font-size: 18px; margin-bottom: 0.5rem; }
.feature-title { font-size: 13px; font-weight: 500; color: var(--ink); margin-bottom: 0.25rem; }
.feature-desc { font-size: 12px; color: var(--ink-muted); line-height: 1.6; }

/* ── Tech stack ── */
.stack-list { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.stack-tag {
  font-size: 11px; padding: 4px 12px;
  border: 1px solid var(--rule); border-radius: 2px;
  color: var(--ink-muted); background: var(--paper-alt);
}

/* ── Impact ── */
.impact-row { display: flex; gap: 3rem; flex-wrap: wrap; }
.impact-item { display: flex; flex-direction: column; }
.impact-num { font-family: var(--serif); font-size: 36px; color: var(--ink); line-height: 1; margin-bottom: 0.25rem; }
.impact-label { font-size: 11px; color: var(--ink-faint); letter-spacing: 0.04em; }

/* ── Tweet card ── */
.tweet-card {
  background: var(--paper-alt); border: 1px solid var(--rule);
  border-radius: 3px; padding: 1.5rem 1.75rem;
  max-width: 480px;
}
.tweet-header { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.tweet-avatar { width: 36px; height: 36px; border-radius: 50%; background: #1d9bf0; display: flex; align-items: center; justify-content: center; }
.tweet-tf { font-size: 14px; color: #fff; font-weight: 700; }
.tweet-name { font-size: 13px; font-weight: 500; color: var(--ink); }
.tweet-handle { font-size: 11px; color: var(--ink-faint); }
.tweet-body { font-size: 13px; color: var(--ink-muted); line-height: 1.65; margin-bottom: 0.75rem; }
.tweet-link { font-size: 11px; color: var(--link); letter-spacing: 0.04em; }
.tweet-link:hover { text-decoration: underline; }

/* ── Project footer ── */
.project-footer {
  max-width: 780px; margin: 0 auto;
  padding: 2.5rem 3rem;
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid var(--rule);
}
.footer-copy { font-size: 11px; color: var(--ink-faint); }
.footer-back {
  font-size: 12px; color: var(--ink-faint);
  letter-spacing: 0.06em; text-transform: uppercase;
  transition: color 0.2s;
}
.footer-back:hover { color: var(--ink-muted); }

/* ── Animations ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-label    { animation: fadeUp 0.45s ease both 0.05s; }
.hero-title    { animation: fadeUp 0.55s ease both 0.15s; }
.hero-subtitle { animation: fadeUp 0.55s ease both 0.25s; }
.cta-row       { animation: fadeUp 0.45s ease both 0.35s; }

/* ── Responsive ── */
@media (max-width: 700px) {
  .topbar { padding: 1rem 1.25rem; }
  .hero { padding: 3rem 1.25rem 2.5rem; }
  .meta-strip { grid-template-columns: 1fr 1fr; }
  .meta-cell { padding: 1.25rem; }
  .content { padding: 0 1.25rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .project-footer { padding: 1.75rem 1.25rem; flex-direction: column; gap: 0.75rem; }
}