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

:root {
  --bg: #f9f8f6;
  --surface: #ffffff;
  --text: #1c1c1c;
  --mid: #555;
  --light: #999;
  --accent: #c87941;
  --border: #e4e1db;
  --max: 720px;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ── */
header {
  border-bottom: 1px solid var(--border);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max);
  margin: 0 auto;
}

.wordmark {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}
.wordmark:hover { color: var(--accent); text-decoration: none; }

nav { display: flex; gap: 24px; }
nav a { font-size: 14px; color: var(--mid); }
nav a:hover { color: var(--text); text-decoration: none; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 64px 24px;
}

footer {
  border-top: 1px solid var(--border);
  max-width: var(--max);
  margin: 0 auto;
  padding: 24px;
  font-size: 13px;
  color: var(--light);
}

/* ── Home ── */
.home-intro { margin-bottom: 56px; }
.home-intro h1 {
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.home-intro p {
  font-size: 18px;
  color: var(--mid);
  max-width: 520px;
  line-height: 1.7;
}

.section-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--light);
  margin-bottom: 16px;
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 48px; }
.tag {
  font-size: 13px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 14px;
  color: var(--mid);
}

/* ── Projects list ── */
.projects-grid { display: flex; flex-direction: column; gap: 8px; }

.project-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  color: inherit;
  text-decoration: none;
  transition: border-color 0.15s;
}
.project-card:hover { border-color: var(--accent); text-decoration: none; }
.project-card h2 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.project-card p { font-size: 14px; color: var(--mid); line-height: 1.5; }
.project-card .card-meta {
  margin-top: 14px;
  font-size: 12px;
  color: var(--light);
}

/* ── App page ── */
.breadcrumb { font-size: 13px; color: var(--light); margin-bottom: 20px; }
.breadcrumb a { color: var(--light); }
.breadcrumb a:hover { color: var(--mid); }

.app-header { margin-bottom: 52px; }
.app-header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}
.app-header p { font-size: 16px; color: var(--mid); max-width: 480px; line-height: 1.65; }

.app-section { margin-bottom: 48px; }
.app-section h2 { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--light); margin-bottom: 16px; }

.download-btns { display: flex; gap: 12px; flex-wrap: wrap; }
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--text);
  color: #fff;
  border-radius: 10px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 600;
  transition: opacity 0.15s;
}
.download-btn:hover { opacity: 0.75; text-decoration: none; color: #fff; }

.video-placeholder {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--light);
  font-size: 14px;
  margin-bottom: 10px;
}

.callout {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 18px 20px;
}
.callout p { font-size: 14px; color: var(--mid); line-height: 1.6; }