/* ============================================================
   Sidebar Navigation - Modern Professional Design
   5 Minute Mock — Theme-Aware Design
   ============================================================ */

.sidebar {
  width: var(--sidebar-width);
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  padding: var(--space-3) var(--space-2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  left: 0;
  top: 0;
  transition: background-color var(--transition-theme), border-color var(--transition-theme);
}

/* ========== Logo ========== */
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  margin-bottom: var(--space-3);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.logo:hover {
  background: var(--color-bg-hover);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-on-primary);
  font-size: 16px;
  flex-shrink: 0;
  box-shadow: var(--shadow-primary);
  transition: background-color var(--transition-theme), box-shadow var(--transition-theme);
}

.logo-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.logo-text h2 {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: var(--color-text);
  line-height: 1.2;
  white-space: nowrap;
}

.logo-text p {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.2;
}

/* ========== Navigation Menu ========== */
.nav-menu {
  flex: 1;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-item {
  margin: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  line-height: 1.4;
  position: relative;
}

.nav-link:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.nav-link.active {
  background: var(--color-bg-active);
  color: var(--color-primary);
  font-weight: var(--font-semibold);
}

/* Active indicator line */
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 60%;
  background: var(--color-primary);
  border-radius: 0 2px 2px 0;
}

/* Nav Icons - SVG style */
.nav-icon {
  width: var(--icon-md);
  height: var(--icon-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.nav-icon svg {
  width: 100%;
  height: 100%;
}

.nav-link:hover .nav-icon {
  color: var(--color-text-secondary);
}

.nav-link.active .nav-icon {
  color: var(--color-primary);
}

/* Badge/Count */
.nav-count {
  margin-left: auto;
  background: var(--color-bg-hover);
  color: var(--color-text-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  min-width: 20px;
  text-align: center;
  transition: background-color var(--transition-theme), color var(--transition-theme);
}

.nav-link.active .nav-count {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

/* ========== Section Headers ========== */
.nav-section {
  margin-top: var(--space-4);
}

.nav-section:first-of-type {
  margin-top: var(--space-2);
}

.nav-section-title {
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: var(--space-2) var(--space-2) var(--space-1);
}

/* ========== Sidebar Footer ========== */
.sidebar-footer {
  margin-top: auto;
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border);
  transition: border-color var(--transition-theme);
}

.app-version {
  font-size: 10px;
  color: var(--color-text-subtle);
  text-align: center;
  padding: var(--space-1) 0;
  font-family: var(--font-mono);
}

/* Settings Item */
.settings-item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: all var(--transition-fast);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
}

.settings-item:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
}

.settings-item .nav-icon {
  color: var(--color-text-muted);
}

.settings-item:hover .nav-icon {
  color: var(--color-text-secondary);
}

/* Logout button */
#logoutBtn:hover {
  color: var(--color-danger);
}

#logoutBtn:hover .nav-icon {
  color: var(--color-danger);
}

/* ========== User Profile ========== */
.user-profile {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: var(--space-1);
  width: 100%;
  background: transparent;
  border: none;
  text-align: left;
}

.user-profile:hover {
  background: var(--color-bg-hover);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: var(--radius);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-on-primary);
  font-weight: var(--font-semibold);
  font-size: var(--text-xs);
  flex-shrink: 0;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
  transition: background-color var(--transition-theme);
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-info p {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-info span {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* ========== Sidebar Overlay (Mobile) ========== */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  backdrop-filter: var(--backdrop-blur);
  -webkit-backdrop-filter: var(--backdrop-blur);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
  z-index: calc(var(--z-overlay) - 1);
}

.sidebar-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ========== Mobile Responsive ========== */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    width: 280px;
    transform: translateX(-100%);
    z-index: var(--z-overlay);
    transition: transform var(--transition-slow), background-color var(--transition-theme);
    box-shadow: var(--shadow-xl);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  /* Touch-friendly nav links on mobile */
  .nav-link {
    min-height: var(--touch-target-min);
    padding: var(--space-3) var(--space-4);
  }

  .settings-item {
    min-height: var(--touch-target-min);
    padding: var(--space-3) var(--space-4);
  }

  .user-profile {
    min-height: var(--touch-target-min);
    padding: var(--space-3) var(--space-4);
  }
}

/* ========== Scrollbar Styling ========== */
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 2px;
  transition: background-color var(--transition-theme);
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}