/* layout.css — core layout, structure, spacing, cards */

:root {
  --gap: 16px;
  --max-width: 980px;
  --radius: 12px;
  --card-bg: rgba(255,255,255,0.02);
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: var(--bg, #0f1012); /* overridden by theme.css */
  color: var(--text, #e6e7ea);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px;
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.brand h1 {
  margin: 0;
  font-size: 1.6rem;
  letter-spacing: 0.4px;
}

.subtitle {
  margin: 4px 0 0 0;
  color: var(--muted, rgba(230,230,234,0.7));
  font-size: 0.9rem;
}

.actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

main {
  max-width: var(--max-width);
  margin: 28px auto;
  padding: 0 18px 72px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.card {
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.02));
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.45);
  border: 1px solid rgba(255,255,255,0.03);
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 36px rgba(0,0,0,0.5);
}

h2, h3 {
  margin: 0 0 8px 0;
}

.placeholder {
  color: var(--muted, rgba(230,230,234,0.6));
  padding: 12px 0;
}

.controls {
  margin-top: 14px;
  display:flex;
  gap:10px;
  align-items:center;
}

footer {
  padding: 20px;
  text-align: center;
  color: var(--muted, rgba(230,230,234,0.6));
  font-size: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.02);
}

/* buttons */
.btn {
  border: 0;
  cursor: pointer;
  padding: 10px 14px;
  border-radius: 8px;
  font-weight: 600;
  background: transparent;
  color: inherit;
}

.btn.primary {
  background: var(--accent, #e78a8a);
  color: #0f1012;
}

.btn.ghost {
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.03);
}

.btn.small {
  padding: 8px 10px;
  font-size: 0.9rem;
}

/* utility */
.hidden { display: none; }
.muted { color: var(--muted, rgba(230,230,234,0.6)); font-size: 0.95rem; }

/* responsiveness */
@media (max-width: 640px) {
  .header-inner { padding: 14px; flex-direction: column; align-items: flex-start; gap:10px; }
  main { margin: 18px auto; padding: 0 12px 64px; }
  .brand h1 { font-size: 1.4rem; }
}