:root{
  --max: 920px;
  --radius: 18px;

  /* Palette */
  --bg: #f7f7f5;
  --bg-soft: #f6f7fb;
  --card: #ffffff;
  --text: #0f172a;        /* slate-900 */
  --muted: #475569;       /* slate-600 */
  --border: rgba(15, 23, 42, 0.10);

  --accent: #2563eb;      /* blue-600 */
  --accent-2: #22c55e;    /* green-500 (petites touches) */
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.08);
}

*{ box-sizing: border-box; }

body{
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  line-height: 1.55;
  color: var(--text);
  background: radial-gradient(1200px 500px at 20% 0%, rgba(37, 99, 235, 0.10), transparent 55%),
              radial-gradient(900px 500px at 85% 10%, rgba(34, 197, 94, 0.10), transparent 60%),
              var(--bg);
}

a{ color: inherit; }

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

.site-header{
  padding-top: 44px;
  padding-bottom: 20px;
}

h1{
  margin: 0 0 10px;
  font-size: clamp(1.8rem, 3vw, 2.2rem);
  letter-spacing: -0.02em;
}

h2{
  margin: 0 0 10px;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

p{ margin: 0 0 12px; }

.lead{
  color: var(--muted);
  font-size: 1.05rem;
}

.muted{ color: var(--muted); }
.small{ font-size: 0.95rem; }

.hint{
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 10px;
}

.cta-row{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 14px;
  border-radius: 14px;
  text-decoration: none;
  border: 1px solid var(--border);
  font-weight: 700;
  transition: transform .08s ease, box-shadow .12s ease, background-color .12s ease;
}

.btn:active{ transform: translateY(1px); }

.btn.primary{
  background: var(--accent);
  color: #fff;
  border-color: rgba(0,0,0,0.0);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.25);
}

.btn.primary:hover{
  box-shadow: 0 14px 30px rgba(37, 99, 235, 0.32);
}

.btn.secondary{
  background: rgba(255,255,255,0.75);
}

.photo-row{
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
  margin-top: 18px;
}

@media (min-width: 720px){
  .photo-row{ grid-template-columns: 1fr 1fr; }
}

.photo{
  margin: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow);
}

.photo img{
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
}

.photo figcaption{
  padding: 10px 12px;
  font-size: 0.95rem;
  color: var(--muted);
}

.stack{
  margin-top: 16px;
}

.card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  background: var(--card);
  box-shadow: var(--shadow);
}

.note{
  border-left: 4px solid var(--accent-2);
  padding: 10px 12px;
  background: var(--bg-soft);
  border-radius: 14px;
}

ul{
  margin: 10px 0 0;
  padding-left: 18px;
}

li{ margin: 6px 0; }

.site-footer{
  padding-top: 10px;
  padding-bottom: 40px;
}

.footer-links{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.95rem;
  color: var(--muted);
}

.video-title {
  margin-top: 20px;
  margin-bottom: 10px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.video-embed {
  position: relative;
  width: 100%;
  max-width: 800px;
  aspect-ratio: 16 / 9;
  margin: 12px auto 8px;
  border-radius: var(--radius);
  overflow: hidden;
  background: #000;
  box-shadow: var(--shadow);
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}