/* ── Main container ── */
.app {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* ── Header ── */
.header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
}

.header__title {
  font-size: 22px;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.01em;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--text), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header__settings-btn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 12px;
  color: var(--text-muted);
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all 0.15s ease;
  flex-shrink: 0;
  margin-left: 12px;
}

.header__settings-btn.active {
  background: #2a2a22;
}

/* ── Panel / Section ── */
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
}

.panel--grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.panel--hidden {
  display: none;
}

.span-full {
  grid-column: 1 / -1;
}