/* ═══════════════════════════════════════════════════════════════
   ThinkForAI.com — Global Stylesheet
   Font: Outfit (display) + Source Serif 4 (body)
   Theme: Dark editorial with electric amber accent
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800;900&family=Source+Serif+4:ital,wght@0,300;0,400;0,600;1,400&display=swap');

/* ─── TOKENS ──────────────────────────────────────────────────── */
:root {
  --bg:          #0a0a0f;
  --bg2:         #111118;
  --bg3:         #18181f;
  --surface:     #1e1e28;
  --border:      rgba(255,255,255,0.08);
  --accent:      #f5a623;
  --accent2:     #ff6b35;
  --accent-glow: rgba(245,166,35,0.15);
  --text:        #e8e8f0;
  --text-muted:  #888898;
  --text-dim:    #555565;
  --heading:     #ffffff;
  --link:        #f5a623;
  --link-hover:  #ffbe55;
  --card-bg:     #16161e;
  --card-hover:  #1c1c26;
  --radius:      10px;
  --radius-lg:   18px;
  --nav-h:       68px;
  --font-display:'Outfit', sans-serif;
  --font-body:   'Source Serif 4', Georgia, serif;
  --font-ui:     'Outfit', sans-serif;
  --shadow:      0 4px 24px rgba(0,0,0,0.4);
  --shadow-card: 0 2px 12px rgba(0,0,0,0.3);
}

/* ─── RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.75;
  min-height: 100vh;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--link); text-decoration: none; transition: color .2s; }
a:hover { color: var(--link-hover); }
ul { list-style: none; }
h1,h2,h3,h4,h5,h6 {
  font-family: var(--font-display);
  color: var(--heading);
  line-height: 1.2;
  font-weight: 700;
}

/* ─── SCROLL PROGRESS ────────────────────────────────────────── */
#scroll-progress {
  position: fixed; top: 0; left: 0; z-index: 9999;
  height: 3px; width: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transition: width .1s linear;
}

/* ─── NAVIGATION ──────────────────────────────────────────────── */
#site-nav {
  position: sticky; top: 0; z-index: 900;
  height: var(--nav-h);
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1240px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; gap: 32px;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem; font-weight: 800;
  letter-spacing: -.5px;
  flex-shrink: 0;
}
.logo-think { color: var(--heading); }
.logo-for   { color: var(--text-muted); font-weight: 400; }
.logo-ai    { color: var(--accent); }

.nav-links {
  display: flex; gap: 6px; align-items: center;
  flex: 1;
}
.nav-links li a {
  font-family: var(--font-ui);
  font-size: .875rem; font-weight: 500;
  color: var(--text-muted);
  padding: 6px 12px; border-radius: 6px;
  transition: all .2s;
}
.nav-links li a:hover,
.nav-links li a.active {
  color: var(--heading);
  background: var(--surface);
}
.nav-cta {
  font-family: var(--font-ui);
  font-size: .85rem; font-weight: 600;
  background: var(--accent);
  color: #0a0a0f;
  padding: 8px 18px; border-radius: 8px;
  flex-shrink: 0;
  transition: background .2s, transform .15s;
}
.nav-cta:hover { background: var(--link-hover); color: #0a0a0f; transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* ─── LAYOUT HELPERS ─────────────────────────────────────────── */
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
.container-sm { max-width: 860px; margin: 0 auto; padding: 0 24px; }
.section { padding: 72px 0; }
.section-sm { padding: 48px 0; }
.label {
  font-family: var(--font-ui);
  font-size: .72rem; font-weight: 700; letter-spacing: .12em;
  text-transform: uppercase; color: var(--accent);
}

/* ─── AD PLACEHOLDERS ────────────────────────────────────────── */
.ad-unit { text-align: center; margin: 32px 0; }
.ad-placeholder {
  background: var(--surface);
  border: 1px dashed var(--border);
  color: var(--text-dim);
  font-family: var(--font-ui);
  font-size: .78rem;
  padding: 20px; border-radius: var(--radius);
  text-align: center;
}

/* ─── CARDS ──────────────────────────────────────────────────── */
.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: background .2s, border-color .2s, transform .2s, box-shadow .2s;
}
.card:hover {
  background: var(--card-hover);
  border-color: rgba(245,166,35,.25);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(0,0,0,.4);
}
.card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.card-body { padding: 20px 24px 24px; }
.card-category {
  font-family: var(--font-ui);
  font-size: .7rem; font-weight: 700; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent);
  margin-bottom: 8px;
}
.card-title {
  font-size: 1.1rem; font-weight: 700;
  color: var(--heading); line-height: 1.3;
  margin-bottom: 10px;
}
.card-excerpt {
  font-size: .9rem; color: var(--text-muted);
  font-family: var(--font-ui);
  line-height: 1.55; margin-bottom: 14px;
}
.card-meta {
  font-family: var(--font-ui); font-size: .78rem;
  color: var(--text-dim); display: flex; gap: 14px;
  align-items: center;
}
.card-meta .reading-time::before { content: "· "; }

/* ─── TAGS / BADGES ─────────────────────────────────────────── */
.tag {
  font-family: var(--font-ui); font-size: .7rem; font-weight: 600;
  letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 10px; border-radius: 4px;
  background: var(--surface); color: var(--text-muted);
  display: inline-block;
}
.tag-accent { background: var(--accent-glow); color: var(--accent); }

/* ─── NEWSLETTER BOX ─────────────────────────────────────────── */
.newsletter-box {
  background: linear-gradient(135deg, var(--surface) 0%, #1a1a28 100%);
  border: 1px solid rgba(245,166,35,.2);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  text-align: center;
}
.newsletter-box h2 { font-size: 1.8rem; margin-bottom: 10px; }
.newsletter-box p { color: var(--text-muted); font-family: var(--font-ui); margin-bottom: 24px; }
.newsletter-form { display: flex; gap: 10px; max-width: 440px; margin: 0 auto; }
.newsletter-form input {
  flex: 1;
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text); border-radius: 8px;
  padding: 12px 16px; font-family: var(--font-ui);
  font-size: .95rem; outline: none;
  transition: border-color .2s;
}
.newsletter-form input:focus { border-color: var(--accent); }
.newsletter-form button {
  background: var(--accent); color: #0a0a0f;
  border: none; border-radius: 8px; cursor: pointer;
  padding: 12px 22px; font-family: var(--font-ui);
  font-size: .9rem; font-weight: 700; white-space: nowrap;
  transition: background .2s;
}
.newsletter-form button:hover { background: var(--link-hover); }
.form-success { color: var(--accent); font-family: var(--font-ui); font-size: 1rem; }

/* ─── SPONSORED TAG ─────────────────────────────────────────── */
.sponsored-tag {
  display: inline-block;
  font-family: var(--font-ui); font-size: .65rem; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  background: rgba(255,107,53,.12); color: var(--accent2);
  border: 1px solid rgba(255,107,53,.2);
  border-radius: 4px; padding: 2px 6px;
  margin-left: 6px; vertical-align: middle;
}

/* ─── FOOTER ────────────────────────────────────────────────── */
#site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  margin-top: 80px;
}
.footer-inner {
  max-width: 1240px; margin: 0 auto; padding: 60px 24px 40px;
  display: grid; grid-template-columns: 1fr 2fr; gap: 60px;
}
.footer-brand .nav-logo { display: inline-block; margin-bottom: 12px; }
.footer-brand p { color: var(--text-muted); font-family: var(--font-ui); font-size: .9rem; line-height: 1.6; max-width: 280px; }
.footer-social { display: flex; gap: 16px; margin-top: 20px; }
.footer-social a { font-family: var(--font-ui); font-size: .8rem; font-weight: 600; color: var(--text-muted); }
.footer-social a:hover { color: var(--accent); }
.footer-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-col h4 {
  font-family: var(--font-ui); font-size: .8rem; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase;
  color: var(--text-dim); margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li a {
  font-family: var(--font-ui); font-size: .875rem; color: var(--text-muted);
}
.footer-col ul li a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 24px; max-width: 1240px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 6px;
}
.footer-bottom p { font-family: var(--font-ui); font-size: .8rem; color: var(--text-dim); }
.footer-disclaimer { font-size: .75rem !important; color: var(--text-dim) !important; font-style: italic; }

/* ─── UTILITIES ──────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-accent  { color: var(--accent); }
.mt-8  { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-40 { margin-top: 40px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

/* ─── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-brand p { max-width: 100%; }
}
@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; position: absolute; top: var(--nav-h); left: 0; right: 0; background: var(--bg2); padding: 16px 24px; border-bottom: 1px solid var(--border); gap: 4px; }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  #site-nav { position: sticky; }
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .newsletter-box { padding: 32px 24px; }
  .newsletter-form { flex-direction: column; }
  .section { padding: 48px 0; }
}
@media (max-width: 480px) {
  .footer-links { grid-template-columns: 1fr; }
}