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

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── Header ── */
.app-header {
  border-bottom: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.header-inner {
  max-width: calc(var(--max-width) + 4rem);
  margin: 0 auto;
  padding: 0.9rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.app-logo {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.app-logo-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  display: inline-block;
}

/* ── Main ── */
.app-main {
  flex: 1;
  max-width: calc(var(--max-width) + 4rem);
  margin: 0 auto;
  padding: 1.75rem 2rem 5rem;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ── States ── */
.loading-state,
.empty-state,
.error-state {
  text-align: center;
  padding: 5rem 2rem;
  color: var(--color-text-muted);
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.loading-state p,
.empty-state p,
.error-state p {
  font-size: 0.95rem;
  margin-top: 0.4rem;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 2.5px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
  margin: 0 auto 1rem;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .header-inner,
  .app-main {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}