/* ============================================
   LOCUS.AUDIO — Design System
   Tonalité : neutre, sobre, professionnel
   Police : DM Sans (corps) + DM Mono (accents)
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;1,9..40,300&family=DM+Mono:wght@300;400&display=swap');

:root {
  --bg:        #F2F0EB;
  --bg-card:   #ECEAE4;
  --fg:        #1A1916;
  --fg-muted:  #6B6860;
  --accent:    #2E5BFF;
  --accent-bg: #EEF1FF;
  --border:    #D4D1C8;
  --success:   #1A7A4A;
  --warning:   #8B5E00;
  --radius:    6px;
  --max-w:     820px;
}

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

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

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* ---- Nav ---- */
nav {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 100;
}
nav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  font-family: 'DM Mono', monospace;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--fg);
  text-decoration: none;
}
.logo span { color: var(--accent); }
nav ul {
  list-style: none;
  display: flex;
  gap: 28px;
  align-items: center;
}
nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.15s;
}
nav a:hover { color: var(--fg); }
.lang-switch {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  color: var(--fg-muted);
  text-decoration: none;
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: var(--radius);
}
.lang-switch:hover { border-color: var(--fg-muted); color: var(--fg); }

/* ---- Hero ---- */
.hero {
  padding: 80px 0 64px;
  border-bottom: 1px solid var(--border);
}
.hero-tag {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 300;
  line-height: 1.25;
  max-width: 600px;
  margin-bottom: 28px;
}
.hero h1 em {
  font-style: italic;
  color: var(--fg-muted);
}
.hero-manifest {
  font-size: 16px;
  color: var(--fg-muted);
  max-width: 540px;
  margin-bottom: 16px;
  line-height: 1.75;
}
.hero-tagline {
  font-size: 15px;
  color: var(--fg);
  margin-bottom: 36px;
  font-weight: 500;
}
.cta-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.15s;
}
.btn-primary {
  background: var(--fg);
  color: var(--bg);
}
.btn-primary:hover { opacity: 0.85; }
.btn-outline {
  background: transparent;
  color: var(--fg);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--fg-muted); }

/* ---- Sections ---- */
section { padding: 56px 0; border-bottom: 1px solid var(--border); }
section:last-of-type { border-bottom: none; }

h2 {
  font-size: 22px;
  font-weight: 400;
  margin-bottom: 32px;
}
h3 {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 8px;
}
p { color: var(--fg-muted); font-size: 15px; line-height: 1.75; }

/* ---- Cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.card-num {
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  color: var(--fg-muted);
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}

/* ---- Table de robustesse ---- */
.robustness-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 16px;
}
.robustness-table th {
  text-align: left;
  padding: 8px 12px;
  background: var(--bg-card);
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.05em;
  border-bottom: 1px solid var(--border);
}
.robustness-table td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--fg-muted);
}
.robustness-table tr:last-child td { border-bottom: none; }
.ok { color: var(--success); font-weight: 500; }
.warn { color: var(--warning); }
.na { color: var(--fg-muted); opacity: 0.5; }

/* ---- Formulaire ---- */
.form-group { margin-bottom: 16px; }
label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--fg);
}
input[type="text"],
input[type="email"],
select,
textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  font-family: 'DM Sans', sans-serif;
  font-size: 14px;
  transition: border-color 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-hint {
  font-size: 12px;
  color: var(--fg-muted);
  margin-top: 4px;
}
.form-note {
  font-size: 13px;
  color: var(--fg-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  margin-bottom: 20px;
  line-height: 1.6;
}

/* ---- Vérification ---- */
.verify-result {
  margin-top: 20px;
  padding: 16px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  display: none;
}
.verify-result.detected {
  background: #EBF5EF;
  border: 1px solid #A8D5B8;
  color: var(--success);
  display: block;
}
.verify-result.not-found {
  background: #FDF3E7;
  border: 1px solid #F0CC8F;
  color: var(--warning);
  display: block;
}
.verify-meta {
  margin-top: 8px;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  opacity: 0.8;
  word-break: break-all;
}

/* ---- Upload zone ---- */
.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.upload-zone:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
}
.upload-zone p { font-size: 14px; margin-top: 8px; }
.upload-icon {
  font-family: 'DM Mono', monospace;
  font-size: 24px;
  color: var(--fg-muted);
}

/* ---- Locus ID badge ---- */
.locus-id {
  font-family: 'DM Mono', monospace;
  font-size: 28px;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin: 16px 0;
}

/* ---- Footer ---- */
footer {
  padding: 32px 0;
  border-top: 1px solid var(--border);
  margin-top: 0;
}
footer .inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
footer p { font-size: 12px; color: var(--fg-muted); }
footer a { color: var(--fg-muted); text-decoration: none; }
footer a:hover { color: var(--fg); }
.footer-links { display: flex; gap: 20px; }

/* ---- Alert messages ---- */
.alert {
  padding: 12px 16px;
  border-radius: var(--radius);
  font-size: 14px;
  margin-bottom: 16px;
}
.alert-success {
  background: #EBF5EF;
  border: 1px solid #A8D5B8;
  color: var(--success);
}
.alert-error {
  background: #FDECEA;
  border: 1px solid #F5A8A0;
  color: #8B1A14;
}

/* ---- Responsive ---- */
@media (max-width: 600px) {
  nav ul { gap: 16px; }
  .hero { padding: 48px 0 40px; }
}