/* Sidebar component styles */
.sidebar {
  width: 280px;
  background: var(--sidebar-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-sizing: border-box;
}

.sidebar-header {
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border-bottom: 1px solid var(--card-border);
  flex-shrink: 0;
}

.header-search-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 34px;
  height: 34px;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
  margin-left: auto;
  box-sizing: border-box;
}

.header-search-btn:hover {
  background: rgba(99, 102, 241, 0.15);
  border-color: rgba(99, 102, 241, 0.3);
  color: var(--text-primary);
  box-shadow: 0 0 12px var(--accent-glow);
  transform: scale(1.05);
}

.brand-container {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.brand-link {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--header-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
  text-decoration: none;
  line-height: 1.1;
}

.brand-link:hover {
  opacity: 0.9;
}

.brand-subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.05em;
  line-height: 1;
}

.sidebar-header svg:not(.brand-logo) {
  fill: var(--accent);
  filter: drop-shadow(0 0 8px var(--accent-glow));
}

.brand-logo-link {
  display: flex;
  text-decoration: none;
}

.brand-logo {
  filter: drop-shadow(0 0 8px var(--accent-glow));
  transition: transform 0.3s ease;
}

.brand-logo:hover {
  transform: scale(1.08);
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-secondary);
  padding: 8px 12px;
  letter-spacing: 0.05em;
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-radius: 12px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  border: 1px solid transparent;
}

.nav-item:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(255, 255, 255, 0.02);
}

.nav-item.active {
  color: var(--text-primary);
  background: rgba(99, 102, 241, 0.08);
  border-color: rgba(99, 102, 241, 0.15);
  box-shadow: inset 0 0 12px rgba(99, 102, 241, 0.05);
}

.pin-btn {
  opacity: 0;
  color: var(--text-secondary);
  transition: opacity 0.2s ease, color 0.2s ease, transform 0.2s ease;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.nav-item:hover .pin-btn {
  opacity: 0.4;
}

.pin-btn:hover {
  opacity: 1;
  color: var(--accent);
  transform: scale(1.1);
}

.pin-btn.pinned {
  opacity: 0.8;
  color: var(--accent);
}

.nav-item-left {
  display: flex;
  align-items: center;
  gap: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item-left span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-item svg {
  fill: currentColor;
  flex-shrink: 0;
}

.nav-badge {
  font-size: 0.75rem;
  background: rgba(255, 255, 255, 0.08);
  padding: 2px 8px;
  border-radius: 20px;
  color: var(--text-primary);
  font-weight: 600;
}

.nav-item.active .nav-badge {
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid var(--card-border);
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
  background: rgba(0, 0, 0, 0.1);
  flex-shrink: 0;
}

.sidebar-footer form.button_to {
  margin: 0;
  display: flex;
}

.footer-user {
  display: flex;
  align-items: center;
  color: var(--text-secondary);
  padding: 0;
}

.user-avatar {
  width: 28px;
  height: 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.8rem;
  box-shadow: 0 0 10px var(--accent-glow);
}

.user-email {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-mailbox {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--card-border);
  color: var(--text-primary);
  padding: 10px;
  border-radius: 12px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.btn-mailbox:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.05);
}

.btn-logout {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.btn-logout:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--text-primary);
}

.footer-admin-link {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
  box-sizing: border-box;
}

.footer-admin-link:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--accent);
}

.footer-layout-toggle-btn,
.footer-seen-toggle-btn,
.footer-theme-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--card-border);
  color: var(--text-secondary);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
  box-sizing: border-box;
}

.footer-layout-toggle-btn:hover,
.footer-seen-toggle-btn:hover,
.footer-theme-toggle-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  color: var(--accent);
}

.footer-theme-toggle-btn svg {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.footer-theme-toggle-btn:hover svg {
  transform: rotate(30deg);
}