:root {
  --primary: #111111;
  --primary-accent: #2563eb;
  --bg: #f5f6f8;
  --bg-section: #ffffff;
  --bg-card: #ffffff;
  --text-main: #111111;
  --text-sub: #555555;
  --border-soft: #e5e7eb;

  --radius-section: 24px;
  --radius-card: 16px;
  --radius-button: 999px;

  --shadow-card: 0 10px 30px rgba(0,0,0,.08);
  --shadow-card-hover: 0 18px 40px rgba(0,0,0,.12);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-main);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-soft);
}
header nav ul {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

/* Sections */
.section {
  padding: 34px 24px;
}
.section-inner {
  max-width: 1080px;
  margin: 0 auto;
}
.section.hero {
  background: linear-gradient(180deg, #ffffff 0%, #f1f5ff 100%);
}

/* Typography */
h1 { font-size: 44px; letter-spacing: -.02em; }
h2 { font-size: 28px; }
h3 { font-size: 18px; }
p { color: var(--text-sub); }

/* Media placeholder */
.media-box {
  width: 100%;
  background: linear-gradient(135deg,#e5e7eb,#f1f5f9);
  border-radius: var(--radius-card);
  position: relative;
  overflow: hidden;
}
.media-box::after {
  content: 'IMAGE';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #9ca3af;
  font-size: 12px;
  letter-spacing: .2em;
}
.media-box.ratio-16-9 { aspect-ratio: 16/9; }
.media-box.ratio-4-3  { aspect-ratio: 4/3; }
.media-box.ratio-1-1  { aspect-ratio: 1/1; }

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px,1fr));
  gap: 20px;
  margin-top: 32px;
}
.card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  transition: transform .25s, box-shadow .25s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

/* CTA */
.cta-box {
  background: #111111;
  color: #ffffff;
  border-radius: var(--radius-section);
  padding: 56px;
  text-align: center;
}
.cta-box button {
  margin-top: 24px;
  background: #2563eb;
  color: #ffffff;
  border: none;
  padding: 14px 28px;
  border-radius: var(--radius-button);
  cursor: pointer;
}

/* Responsive */
@media (max-width: 1024px) {
  .section { padding: 72px 20px; }
  h1 { font-size: 36px; }
}
@media (max-width: 640px) {
  .section { padding: 56px 16px; }
  h1 { font-size: 30px; }
  .cta-box { padding: 36px 20px; }
  .cta-box button { width: 100%; }
}