/* ══════════════════════════════════════════════
   Layout — Structure, Navigation, Responsive
   ══════════════════════════════════════════════ */

.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ── Navigation ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-xl);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--eontra-border);
  z-index: 1000;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.nav-logo {
  min-width: 36px;
  height: 32px;
  padding: 0 6px;
  background: var(--accent-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 11px;
  color: white;
  letter-spacing: 0.02em;
}

.nav-title {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-title span {
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 6px;
}

.nav-subtitle {
  font-size: 0.6rem;
  color: var(--text-subtle);
  font-weight: 400;
  letter-spacing: 0.03em;
  line-height: 1;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  padding-top: 64px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

.container-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-xl);
}

/* ── Views ── */
.view {
  display: none;
  animation: fadeSlideUp 0.5s var(--ease-out) forwards;
}

.view.active {
  display: block;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Section spacing ── */
.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

/* ── Grid ── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-md); }

/* ── Flex helpers ── */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { align-items: center; justify-content: center; }
.flex-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

/* ── Footer ── */
.footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--eontra-border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.footer a {
  color: var(--accent-primary);
  text-decoration: none;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .nav { padding: 0 var(--space-md); }
  .container, .container-wide { padding: 0 var(--space-md); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: var(--space-2xl) 0; }
  .hide-mobile { display: none !important; }
}

@media (max-width: 480px) {
  html { font-size: 14px; }
}