/* ── Sidebar ── */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  overflow-y: auto;
  overflow-x: hidden;
  transition: width var(--duration-slow) var(--ease-out);
  backdrop-filter: blur(12px);
  background: rgba(17,17,22,0.85);
}

/* ── Sidebar collapsed state ── */
body.sidebar-collapsed .sidebar {
  width: var(--sidebar-collapsed);
}

body.sidebar-collapsed .sidebar-brand span,
body.sidebar-collapsed .sidebar-nav-item span:not(.nav-shortcut),
body.sidebar-collapsed .sidebar-nav-item .nav-label,
body.sidebar-collapsed .sidebar-realtime span:not(.realtime-dot),
body.sidebar-collapsed .sidebar-user-email,
body.sidebar-collapsed .sidebar-user .btn span,
body.sidebar-collapsed .realtime-rpm,
body.sidebar-collapsed .sidebar-collapse-btn span {
  opacity: 0;
  width: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: opacity 0.2s, width 0.2s;
}

body.sidebar-collapsed .sidebar-nav-item {
  justify-content: center;
  padding: 10px;
}

body.sidebar-collapsed .sidebar-nav-item svg {
  margin: 0;
}

body.sidebar-collapsed .sidebar-brand {
  justify-content: center;
  padding: 20px 12px;
}

body.sidebar-collapsed .main {
  margin-left: var(--sidebar-collapsed);
}

body.sidebar-collapsed .sidebar-nav-item .nav-shortcut {
  display: none;
}

/* ── Brand ── */
.sidebar-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
  position: relative;
  overflow: hidden;
  transition: padding var(--duration-slow) var(--ease-out);
}

.sidebar-brand::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.08) 0%, rgba(34,211,238,0.04) 100%);
  pointer-events: none;
}

.sidebar-brand svg {
  width: 30px;
  height: 30px;
  color: var(--accent);
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(99,102,241,0.3));
  transition: transform 0.3s var(--ease-spring);
}

.sidebar-brand:hover svg {
  transform: rotate(-8deg) scale(1.05);
}

.sidebar-brand span {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text) 60%, var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  transition: opacity 0.2s, width 0.3s;
}

/* ── Navigation ── */
.sidebar-nav {
  flex: 1;
  padding: 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--duration-fast) var(--ease-smooth);
  border: none;
  background: none;
  width: 100%;
  text-align: left;
  position: relative;
  overflow: hidden;
  font-family: var(--font-sans);
  letter-spacing: -0.01em;
}

.sidebar-nav-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--accent-gradient);
  opacity: 0;
  transition: opacity var(--duration-fast);
  border-radius: inherit;
}

.sidebar-nav-item:hover {
  color: var(--text);
  background: rgba(255,255,255,0.04);
}

.sidebar-nav-item:hover::before {
  opacity: 0.04;
}

.sidebar-nav-item.active {
  color: var(--accent);
  background: var(--accent-muted);
}

.sidebar-nav-item.active::before {
  opacity: 0.08;
}

.sidebar-nav-item.active::after {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 60%;
  width: 3px;
  background: var(--accent-gradient);
  border-radius: 0 4px 4px 0;
  box-shadow: 0 0 12px var(--accent-glow);
  animation: fadeIn 0.3s var(--ease-out);
}

.sidebar-nav-item svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  transition: transform 0.2s var(--ease-spring);
}

.sidebar-nav-item:hover svg {
  transform: scale(1.08);
}

.sidebar-nav-item:active svg {
  transform: scale(0.95);
}

/* Keyboard shortcut hints */
.nav-shortcut {
  margin-left: auto;
  font-size: 10px;
  font-weight: 600;
  font-family: var(--font-mono);
  color: var(--muted-2);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  padding: 2px 6px;
  border-radius: 4px;
  letter-spacing: 0.02em;
  transition: opacity 0.2s;
}

.sidebar-nav-item:hover .nav-shortcut {
  color: var(--muted);
}

/* ── Collapse button ── */
.sidebar-collapse-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  margin: 4px 8px;
  border-radius: var(--radius-xs);
  cursor: pointer;
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  border: none;
  background: none;
  width: calc(100% - 16px);
  text-align: left;
  font-family: var(--font-sans);
  transition: all var(--duration-fast);
}

.sidebar-collapse-btn:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.sidebar-collapse-btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  transition: transform var(--duration-slow) var(--ease-out);
}

body.sidebar-collapsed .sidebar-collapse-btn svg {
  transform: rotate(180deg);
}

/* ── Realtime indicator ── */
.sidebar-realtime {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

.realtime-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

.realtime-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--success);
  flex-shrink: 0;
  animation: pulse-glow 2s ease-in-out infinite;
  box-shadow: 0 0 8px var(--success-glow);
}

.realtime-rpm {
  font-weight: 700;
  color: var(--text);
  font-size: 14px;
  font-family: var(--font-mono);
  transition: opacity 0.2s;
}

/* ── User area ── */
.sidebar-user {
  padding: 16px 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-user-email {
  font-size: 12px;
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.sidebar-user .btn {
  font-size: 12px;
  padding: 7px 14px;
}

/* ── Mobile sidebar toggle ── */
#sidebarToggle {
  display: none;
}

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(17,17,22,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 110;
  align-items: center;
  padding: 0 16px;
  gap: 12px;
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-xs);
  transition: background var(--duration-fast);
}

.hamburger:hover {
  background: rgba(255,255,255,0.06);
}

.hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.2s;
}

#sidebarToggle:checked ~ .mobile-header .hamburger span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
#sidebarToggle:checked ~ .mobile-header .hamburger span:nth-child(2) {
  opacity: 0;
}
#sidebarToggle:checked ~ .mobile-header .hamburger span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-brand {
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -0.02em;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 99;
}