:root {
    --bg-main: #0b0f19;
    --bg-card: #111827;
    --bg-card-hover: #1f2937;
    --bg-sidebar: #0f172a;
    --border-color: #1e293b;
    --border-focus: #f97316;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --primary: #f97316;
    --primary-hover: #ea580c;
    --primary-gradient: linear-gradient(135deg, #f97316 0%, #fb923c 100%);
    --accent: #10b981;
    --danger: #ef4444;
    --danger-hover: #dc2626;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme Variables (Chapter 12.2) */
[data-theme="light"] {
    --bg-main: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --bg-sidebar: #ffffff;
    --border-color: #e2e8f0;
    --border-focus: #f97316;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* Header */
.app-header {
    background-color: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

[data-theme="light"] .app-header {
    background-color: rgba(255, 255, 255, 0.85);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.25rem;
    letter-spacing: -0.02em;
}

.logo-icon {
    font-size: 1.4rem;
}

.logo-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.user-nav {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
}

.header-select {
    padding: 0.3rem 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    cursor: pointer;
}

.lang-switcher {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.lang-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.1rem;
    line-height: 1;
    padding: 0.2rem 0.35rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
    transition: var(--transition);
    opacity: 0.6;
    cursor: pointer;
}

.lang-link:hover {
    color: var(--text-primary);
    border-color: var(--text-muted);
    opacity: 1;
}

.lang-link.active,
.lang-link[aria-current="true"] {
    opacity: 1;
    border-color: var(--primary);
    background: var(--primary-light, rgba(9, 105, 218, 0.1));
}

.settings-menu {
    position: relative;
}

.settings-menu-trigger {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.55rem;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    list-style: none;
    user-select: none;
}

.settings-menu-trigger::-webkit-details-marker {
    display: none;
}

.settings-menu-trigger:hover,
.settings-menu-trigger:focus-visible,
.settings-menu[open] .settings-menu-trigger {
    color: var(--text-primary);
    border-color: var(--text-muted);
}

.settings-menu-trigger:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.settings-menu-panel {
    position: absolute;
    z-index: 100;
    top: calc(100% + 0.5rem);
    right: 0;
    width: min(330px, calc(100vw - 2rem));
    padding: 0.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
}

.settings-menu-item {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    padding: 0.7rem;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
}

.settings-menu-item:hover,
.settings-menu-item:focus-visible {
    background: var(--bg-card-hover);
}

.settings-menu-item span:last-child {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.settings-menu-item strong {
    font-size: 0.82rem;
}

.settings-menu-item small,
.settings-menu-note {
    color: var(--text-muted);
    font-size: 0.72rem;
    line-height: 1.4;
}

.settings-menu-note {
    margin: 0.4rem 0.7rem 0.25rem;
    padding-top: 0.55rem;
    border-top: 1px solid var(--border-color);
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.avatar {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

.username {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Main */
.app-main {
    flex: 1;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
    padding: 1.5rem;
}

/* Hero / Login */
.hero-section {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 200px);
    padding: 2rem 1rem;
}

.hero-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 3rem 2.5rem;
    max-width: 580px;
    width: 100%;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.hero-badge {
    display: inline-block;
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary);
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: 0.3rem 0.8rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: 1.85rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 1rem;
    letter-spacing: -0.03em;
}

.hero-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.hero-features {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    text-align: left;
    margin-bottom: 2.5rem;
    background: rgba(15, 23, 42, 0.4);
    padding: 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

[data-theme="light"] .hero-features {
    background: #f1f5f9;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.hero-cta {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.cta-note {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Dashboard Layout */
.dashboard-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width, 290px) 12px 1fr;
    gap: 0.75rem;
    align-items: start;
    padding-bottom: 5rem; /* space for floating bulk toolbar */
}

/* Sidebar Resizer (Chapter 14.1) */
.sidebar-resizer {
    width: 12px;
    height: 100%;
    min-height: 400px;
    cursor: col-resize;
    user-select: none;
    -webkit-user-select: none;
    touch-action: none;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    border-radius: var(--radius-sm);
    transition: background-color 0.15s ease;
    outline: none;
    z-index: 10;
    align-self: stretch;
}

.sidebar-resizer:hover,
.sidebar-resizer:focus-visible,
.sidebar-resizer.is-dragging {
    background-color: rgba(59, 130, 246, 0.12);
}

.sidebar-resizer:focus-visible {
    box-shadow: 0 0 0 2px var(--border-focus);
}

.sidebar-resizer-line {
    width: 2px;
    height: 48px;
    background-color: var(--border-color);
    border-radius: 9999px;
    transition: background-color 0.15s ease, height 0.15s ease;
}

.sidebar-resizer:hover .sidebar-resizer-line,
.sidebar-resizer:focus-visible .sidebar-resizer-line,
.sidebar-resizer.is-dragging .sidebar-resizer-line {
    background-color: var(--primary);
    height: 64px;
}

/* Breadcrumb Navigation (Chapter 14.2) */
.breadcrumb-nav {
    margin-bottom: 1rem;
    padding: 0.5rem 0.85rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.breadcrumb-list {
    list-style: none;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0;
    padding: 0;
    font-size: 0.875rem;
}

.breadcrumb-item {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1;
}

.breadcrumb-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    border-radius: var(--radius-sm);
    padding: 0.15rem 0.35rem;
}

.breadcrumb-link:hover {
    color: var(--primary-hover);
    background: rgba(59, 130, 246, 0.1);
    text-decoration: underline;
}

.breadcrumb-item.active .breadcrumb-current {
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.15rem 0.35rem;
}

/* Group Card within repo-container (Chapter 14.2) */
.group-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-left: 3px solid var(--primary);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.group-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.group-card:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 2px;
}

.group-card .repo-name-area {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.group-card .group-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    line-height: 1;
}

.badge-group-count {
    background: rgba(59, 130, 246, 0.15);
    color: var(--primary);
    font-weight: 600;
    border-radius: 9999px;
    padding: 0.15rem 0.5rem;
    font-size: 0.75rem;
    margin-left: auto;
}

.group-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.group-meta-item {
    display: inline-flex;
    align-items: center;
}

.repo-view-compact .group-card {
    border-left: 3px solid var(--primary);
}

/* Sidebar */
.sidebar {
    background: var(--bg-sidebar);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    position: sticky;
    top: 5rem;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-title-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sidebar-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sidebar-settings {
    margin-top: 1rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

.toggle-switch-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.group-nav, .group-subnav {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.group-subnav {
    margin-left: 0.75rem;
    padding-left: 0.5rem;
    border-left: 1px dashed var(--border-color);
}

.group-nav-item {
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.group-nav-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    gap: 0.2rem;
}

.group-nav-row:hover {
    background: var(--bg-card-hover);
}

.group-nav-item.active > .group-nav-row {
    background: rgba(59, 130, 246, 0.15);
    border-left: 3px solid var(--primary);
}

/* Group Tree Collapse/Expand (Chapter 11.1) */
.group-collapse-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.65rem;
    width: 20px;
    height: 20px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    flex-shrink: 0;
    padding: 0;
    margin-left: 0.25rem;
}

.group-collapse-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
}

[data-theme="light"] .group-collapse-btn:hover {
    background: rgba(0, 0, 0, 0.06);
}

.group-collapse-btn:focus-visible {
    outline: 2px solid var(--border-focus);
    outline-offset: 1px;
}

.group-collapse-spacer {
    width: 20px;
    height: 20px;
    display: inline-block;
    flex-shrink: 0;
    margin-left: 0.25rem;
}

.collapse-icon {
    display: inline-block;
    line-height: 1;
    user-select: none;
}

.group-nav-link {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    flex: 1;
    padding: 0.45rem 0.4rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    min-width: 0;
    overflow: hidden;
}

.group-nav-item.active > .group-nav-row .group-nav-link {
    color: var(--text-primary);
    font-weight: 600;
}

.group-icon {
    font-size: 0.9rem;
    flex-shrink: 0;
}

.group-name {
    flex: 1;
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.group-count {
    background: rgba(148, 163, 184, 0.15);
    font-size: 0.7rem;
    padding: 0.1rem 0.4rem;
    border-radius: 9999px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.group-actions {
    display: flex;
    align-items: center;
    padding-right: 0.4rem;
    opacity: 1;
    transition: var(--transition);
    gap: 0.15rem;
    flex-shrink: 0;
}

.group-action-spacer {
    width: 1.25rem;
    flex-shrink: 0;
}


/* Toolbar & Filters */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.content-title {
    font-size: 1.35rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.count-badge {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--bg-sidebar);
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

/* Sorting Controls (Chapter 13.2) */
.sort-control-group {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--bg-card);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.sort-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.order-toggle-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.view-toggle-group {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.view-toggle-group .btn {
    border-radius: 0;
    border: none;
}

.view-toggle-group .btn.active {
    background: var(--primary);
    color: #fff;
}

.filter-bar-wrapper {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    align-items: center;
    flex-wrap: wrap;
}

.filter-bar {
    display: flex;
    gap: 0.75rem;
    flex: 1;
    background: var(--bg-card);
    padding: 0.65rem 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.search-box {
    flex: 1;
}

.filter-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.selection-control {
    display: flex;
    align-items: center;
}

/* Repositories Container (Detailed vs Compact) */
.repo-container {
    display: grid;
    gap: 1rem;
}

.repo-view-detailed {
    grid-template-columns: repeat(auto-fill, minmax(min(360px, 100%), 1fr));
}

.repo-view-compact {
    grid-template-columns: 1fr;
    gap: 0.5rem;
}

.repo-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    position: relative;
    transition: var(--transition);
}

.repo-card:hover {
    border-color: rgba(59, 130, 246, 0.4);
    box-shadow: var(--shadow-md);
}

.repo-card.selected {
    border-color: var(--primary);
    background: rgba(59, 130, 246, 0.05);
}

.repo-select-wrapper {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
}

.repo-checkbox {
    width: 17px;
    height: 17px;
    cursor: pointer;
    accent-color: var(--primary);
}

/* Compact Card Styling */
.repo-view-compact .repo-card {
    padding: 0.65rem 1rem;
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.repo-view-compact .repo-select-wrapper {
    position: static;
    margin-right: 0.5rem;
}

.repo-view-compact .detailed-only {
    display: none !important;
}

.repo-view-compact .repo-header {
    flex: 1;
    min-width: 180px;
}

.repo-view-compact .repo-fullname {
    display: none;
}

.repo-view-compact .repo-groups-section {
    padding-top: 0;
    justify-content: flex-end;
}

.repo-header {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding-right: 2rem;
}

.repo-title-wrapper {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

/* Display Name & Inline Edit (Chapter 13.1) */
.repo-name-area {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.edit-name-btn {
    opacity: 0;
    transition: var(--transition);
    font-size: 0.75rem;
    cursor: pointer;
}

.repo-card:hover .edit-name-btn {
    opacity: 0.8;
}

.edit-name-btn:hover {
    opacity: 1;
    color: var(--primary);
}

.inline-name-form {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.form-input-sm {
    padding: 0.25rem 0.5rem;
    font-size: 0.85rem;
    max-width: 200px;
}

.repo-name {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
}

.repo-name:hover {
    color: var(--primary);
}

.repo-fullname {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
}

.repo-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.repo-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: auto;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

[data-theme="light"] .repo-meta {
    border-top: 1px solid #f1f5f9;
}

.repo-lang {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.lang-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: var(--primary);
}

/* Groups tags inside repo card */
.repo-groups-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    flex-wrap: wrap;
    padding-top: 0.5rem;
}

.repo-groups-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.group-tag {
    background: rgba(249, 115, 22, 0.12);
    border: 1px solid rgba(249, 115, 22, 0.25);
    color: #fdba74;
    font-size: 0.75rem;
    padding: 0.15rem 0.45rem;
    border-radius: var(--radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

[data-theme="light"] .group-tag {
    background: rgba(249, 115, 22, 0.1);
    color: #c2410c;
    border-color: rgba(249, 115, 22, 0.2);
}

.remove-group-form {
    display: inline;
}

.remove-group-btn {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 0.85rem;
    line-height: 1;
    padding: 0;
    opacity: 0.7;
    transition: var(--transition);
}

.remove-group-btn:hover {
    opacity: 1;
    color: var(--danger);
}

/* Badges */
.badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.badge-version {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

.badge-private {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

[data-theme="light"] .badge-private {
    color: #dc2626;
}

.badge-public {
    background: rgba(16, 185, 129, 0.1);
    color: #86efac;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

[data-theme="light"] .badge-public {
    color: #059669;
}

.badge-archived {
    background: rgba(148, 163, 184, 0.1);
    color: #cbd5e1;
    border: 1px solid var(--border-color);
}

/* Floating Bulk Toolbar (Chapter 12.1) */
.bulk-toolbar {
    position: fixed;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 90;
    max-width: 900px;
    width: calc(100% - 2rem);
    animation: slideUp 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, 20px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

.bulk-toolbar-inner {
    background: var(--bg-card);
    border: 2px solid var(--primary);
    border-radius: var(--radius-lg);
    padding: 0.75rem 1.25rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-lg);
    flex-wrap: wrap;
    gap: 0.75rem;
}

.bulk-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.bulk-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.bulk-action-item {
    display: flex;
    align-items: center;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--bg-card);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
}

.btn-outline {
    background: transparent;
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.btn-github {
    background: #24292e;
    border-color: #444d56;
    color: #ffffff;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.btn-github:hover {
    background: #2f363d;
    border-color: #586069;
}

.btn-sm {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
}

#syncButton {
    width: 10.5rem;
    white-space: nowrap;
}

.btn-lg {
    padding: 0.8rem 1.75rem;
    font-size: 1.05rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--text-muted);
    text-decoration: underline;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.85rem;
    padding: 0.2rem;
    border-radius: var(--radius-sm);
    color: inherit;
}

.text-danger {
    color: var(--danger);
}

/* Forms */
.form-input {
    width: 100%;
    padding: 0.55rem 0.75rem;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-input:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.form-select-sm {
    padding: 0.3rem 0.6rem;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.75rem;
    cursor: pointer;
    max-width: 100%;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    margin-bottom: 1rem;
    text-align: left;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.required {
    color: var(--danger);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 100;
    align-items: center;
    justify-content: center;
}

.modal.open {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    max-width: 480px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    animation: modalPop 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalPop {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.25rem;
    cursor: pointer;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

/* Alerts & Empty State */
.alert {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
    font-size: 0.875rem;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

[data-theme="light"] .alert-error {
    color: #dc2626;
}

.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-card);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.75rem;
    margin-top: auto;
}

/* Responsive (Tablet & Mobile) */
@media (max-width: 900px) {
    .dashboard-layout {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .sidebar-resizer {
        display: none !important;
    }
    .sidebar {
        position: static;
        width: 100% !important;
    }
    .bulk-toolbar-inner {
        flex-direction: column;
        align-items: stretch;
    }
    .bulk-actions {
        justify-content: flex-start;
    }
}

@media (max-width: 480px) {
    .header-container {
        padding: 0.5rem 1rem;
    }
    .app-main {
        padding: 1rem;
    }
    .hero-card {
        padding: 2rem 1.25rem;
    }
    .repo-card {
        padding: 1rem;
    }
    .toolbar-right {
        width: 100%;
        justify-content: space-between;
    }
    .filter-bar {
        flex-direction: column;
    }
    .modal-content {
        width: 95%;
    }
    .modal-body {
        padding: 1rem;
    }
}