/* AgentShift – Editorial Dark / Brutalist Modern – Nov 2026 */
:root {
  --bg: #05050A;
  --bg-elevated: #0C0C12;
  --bg-card: #0F0F16;
  --text: #F0F0F0;
  --text-muted: #A0A0A8;
  --accent-agent: #00E5FF;
  --accent-saas: #FFB800;
  --border: #1A1A22;
  --font-sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "JetBrains Mono", ui-monospace, monospace;
  --max-width: 1120px;
  --radius: 2px;
  --transition: 180ms cubic-bezier(0.2, 0, 0, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--accent-agent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: color-mix(in srgb, var(--accent-agent) 80%, white); }
a:focus-visible {
  outline: 2px solid var(--accent-agent);
  outline-offset: 3px;
}

/* Typography */
.display {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h1, h2, h3 {
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0 0 0.75rem;
}

.mono { font-family: var(--font-mono); }

.lead {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  color: var(--text-muted);
  max-width: 42ch;
}

/* Layout */
.container {
  width: min(100% - 2rem, var(--max-width));
  margin-inline: auto;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
  gap: 1.5rem;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
  color: var(--text);
}
.logo span { color: var(--accent-agent); }

.nav {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  flex-wrap: wrap;
}

.nav a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.nav a:hover,
.nav a[aria-current="page"] { color: var(--text); }

.lang-toggle {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  background: none;
  border: 1px solid var(--border);
  padding: 0.35rem 0.6rem;
  cursor: pointer;
  border-radius: var(--radius);
}
.lang-toggle:hover { border-color: var(--text-muted); color: var(--text); }

/* Hero */
.hero {
  padding-block: clamp(3.5rem, 10vw, 7rem) 3.5rem;
  border-bottom: 1px solid var(--border);
}

.hero-tag {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-agent);
  margin-bottom: 1.1rem;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.35rem;
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.btn-primary {
  background: var(--accent-agent);
  color: #05050A;
}
.btn-primary:hover { background: color-mix(in srgb, var(--accent-agent) 85%, white); }

.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover { border-color: var(--text-muted); }

/* Predicates / Split */
.predicates {
  display: grid;
  gap: 1px;
  background: var(--border);
  margin-block: 3rem;
}

@media (min-width: 700px) {
  .predicates { grid-template-columns: 1fr 1fr; }
}

.predicate {
  background: var(--bg);
  padding: 1.75rem;
}

.predicate h3 {
  font-size: 1.05rem;
  margin: 0 0 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.predicate.replace h3::before,
.predicate.integrate h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.predicate.replace h3::before { background: var(--accent-agent); }
.predicate.integrate h3::before { background: var(--accent-saas); }

.predicate p {
  color: var(--text-muted);
  margin: 0;
  font-size: 0.95rem;
}

/* Sections */
.section {
  padding-block: 4.5rem;
}

.section-header {
  margin-bottom: 2.25rem;
}

.section-header h2 {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
}

.section-header p {
  color: var(--text-muted);
  max-width: 52ch;
  margin: 0.5rem 0 0;
}

/* Comparison */
.comparison {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.comparison th,
.comparison td {
  padding: 1rem 1.1rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

.comparison th {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-weight: 500;
}

.comparison td:first-child { color: var(--text-muted); }
.comparison td:last-child { color: var(--text); font-weight: 500; }

/* Cards / Grid */
.card-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 700px) {
  .card-grid.cols-2 { grid-template-columns: 1fr 1fr; }
  .card-grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 1.5rem;
  border-radius: var(--radius);
  transition: border-color var(--transition);
}
.card:hover { border-color: color-mix(in srgb, var(--border) 60%, var(--accent-agent)); }

.card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin: 0;
}

.card .meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.75rem;
  letter-spacing: 0.03em;
}

/* Tags / Filters */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 2rem;
}

.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.45rem 0.9rem;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  border-radius: var(--radius);
  transition: all var(--transition);
}
.filter-btn:hover,
.filter-btn[aria-pressed="true"] {
  border-color: var(--accent-agent);
  color: var(--accent-agent);
}

/* Manifesto blocks */
.manifesto-block {
  margin-bottom: 3rem;
}

.manifesto-block .quote {
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
  max-width: 24ch;
}

.manifesto-block p {
  color: var(--text-muted);
  max-width: 60ch;
}

/* Form */
.form-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  padding: 2rem;
  max-width: 440px;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 0.35rem;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  font: inherit;
  border-radius: var(--radius);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-agent);
}

/* Lexique */
.lexique-list {
  display: grid;
  gap: 1.5rem;
}

.lexique-item {
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
}

.lexique-item dt {
  font-weight: 650;
  font-size: 1.15rem;
  margin-bottom: 0.4rem;
}

.lexique-item dd {
  color: var(--text-muted);
  margin: 0;
  max-width: 60ch;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 3rem 2rem;
  margin-top: 3rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Utility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.hidden { display: none !important; }