/*
Theme Name: Signal AI
Theme URI: https://tondomaine.com
Author: Maxscor
Description: Thème éditorial moderne pour blog IA/Automatisation, avec mise en avant des vidéos sources et indicateur de tendance.
Version: 1.0
Requires at least: 6.0
Requires PHP: 7.4
Text Domain: signal-ai
*/

:root {
  --bg: #14151A;
  --surface: #1D1F26;
  --surface-hover: #23252E;
  --border: #2A2D36;
  --text: #EDEEF2;
  --text-muted: #8B8F9C;
  --accent-brass: #E3B23C;
  --accent-teal: #3FBFA3;
  --radius: 4px;
  --font-display: "IBM Plex Mono", ui-monospace, monospace;
  --font-body: "IBM Plex Sans", -apple-system, sans-serif;
  --max-width: 1080px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-teal); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent-brass);
  outline-offset: 2px;
}

img { max-width: 100%; display: block; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- HEADER : bandeau façon terminal ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
  position: sticky;
  top: 0;
  background: rgba(20, 21, 26, 0.92);
  backdrop-filter: blur(6px);
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.terminal-prompt {
  font-family: var(--font-display);
  font-size: 14px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
}

.terminal-prompt .prompt-sign { color: var(--accent-teal); }
.terminal-prompt .site-name { color: var(--text); font-weight: 600; }

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 500;
}

.main-nav a:hover { color: var(--accent-brass); text-decoration: none; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: var(--radius);
  padding: 6px 10px;
  font-family: var(--font-display);
  cursor: pointer;
}

/* ---------- HERO ---------- */
.hero {
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--border);
}

.hero-thesis {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--accent-teal);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

.hero-thesis::before { content: "// "; color: var(--text-muted); }

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}

.hero p.lede {
  color: var(--text-muted);
  font-size: 18px;
  max-width: 620px;
  margin: 0;
}

/* ---------- SIGNAL BARS (signature element) ---------- */
.signal-bars {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
  vertical-align: middle;
}

.signal-bars span {
  width: 3px;
  background: var(--border);
  border-radius: 1px;
}

.signal-bars span:nth-child(1) { height: 40%; }
.signal-bars span:nth-child(2) { height: 60%; }
.signal-bars span:nth-child(3) { height: 80%; }
.signal-bars span:nth-child(4) { height: 100%; }

.signal-bars[data-level="1"] span:nth-child(-n+1) { background: var(--accent-brass); }
.signal-bars[data-level="2"] span:nth-child(-n+2) { background: var(--accent-brass); }
.signal-bars[data-level="3"] span:nth-child(-n+3) { background: var(--accent-brass); }
.signal-bars[data-level="4"] span:nth-child(-n+4) { background: var(--accent-brass); }

/* ---------- ARTICLE GRID / CARDS ---------- */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
  padding: 40px 0 64px;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.article-card:hover {
  border-color: var(--accent-teal);
  transform: translateY(-2px);
}

.article-card .thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--surface-hover);
}

.article-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-card .card-body {
  padding: 18px 20px 20px;
}

.card-flag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 12px;
  color: var(--accent-teal);
  border: 1px solid var(--accent-teal);
  border-radius: var(--radius);
  padding: 2px 8px;
  margin-bottom: 12px;
}

.card-flag::before { content: "--"; opacity: 0.6; }

.article-card h2 {
  font-family: var(--font-display);
  font-size: 18px;
  line-height: 1.35;
  margin: 0 0 10px;
}

.article-card h2 a { color: var(--text); }

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  font-family: var(--font-display);
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

/* ---------- SINGLE POST ---------- */
.single-post { padding: 48px 0 80px; }

.single-post .post-header { max-width: 720px; margin: 0 auto 32px; }

.single-post h1 {
  font-family: var(--font-display);
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.2;
  margin: 0 0 16px;
}

.post-meta-row {
  display: flex;
  gap: 16px;
  align-items: center;
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--text-muted);
}

.featured-image {
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
  border: 1px solid var(--border);
}

.post-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 17px;
}

.post-content h2 {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 40px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.post-content p { margin: 0 0 20px; color: var(--text); }

.video-embed {
  margin: 32px 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  position: relative;
}

.video-embed::before {
  content: "terminal output — source video";
  display: block;
  font-family: var(--font-display);
  font-size: 11px;
  color: var(--text-muted);
  background: var(--surface);
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
}

.source-credit {
  max-width: 720px;
  margin: 24px auto 0;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text-muted);
}

/* ---------- FOOTER ---------- */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 40px 0;
  font-size: 14px;
  color: var(--text-muted);
}

.site-footer .footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.site-footer h3 {
  font-family: var(--font-display);
  font-size: 13px;
  color: var(--text);
  margin: 0 0 12px;
}

.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 8px; }

/* ---------- RESPONSIVE ---------- */
@media (max-width: 720px) {
  .main-nav { display: none; }
  .main-nav.is-open { display: block; }
  .nav-toggle { display: inline-block; }
  .site-header .container { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  .article-card { transition: none; }
}