:root {
    --bg-color: #0f0f13;
    --sidebar-bg: #18181c;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-hover: rgba(255, 255, 255, 0.08);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-primary: #ffffff;
    --text-secondary: #9aa0a6;
    --accent-color: #a8c7fa;
    --accent-gradient: linear-gradient(135deg, #a8c7fa 0%, #c584ff 100%);
    --accent-gradient-hover: linear-gradient(135deg, #b9d3fa 0%, #d19bff 100%);
    --danger-color: #ff5e5e;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 24px;
}

.logo h2 {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 12px;
}

/* Custom Scrollbar */
.sidebar-content::-webkit-scrollbar {
    width: 6px;
}
.sidebar-content::-webkit-scrollbar-track {
    background: transparent;
}
.sidebar-content::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 10px;
}

.category {
    margin-bottom: 16px;
}

.category-header {
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 12px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 1px;
    border-radius: 6px;
    transition: color 0.2s;
}

.category-header:hover {
    color: var(--text-primary);
}

.category-links {
    list-style: none;
    margin-top: 4px;
}

.gem-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.gem-link i {
    font-size: 14px;
    opacity: 0.7;
}

.gem-link:hover {
    background-color: var(--card-hover);
    color: var(--text-primary);
}

.gem-link.active {
    background: var(--card-bg);
    color: var(--accent-color);
    border-left: 3px solid var(--accent-color);
}

.gem-link.active i {
    color: var(--accent-color);
    opacity: 1;
}

.sidebar-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    opacity: 0.3;
    transition: opacity 0.2s;
    margin-left: auto;
}

.gem-link:hover .sidebar-actions {
    opacity: 1;
}

.sidebar-action-btn {
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 12px;
    padding: 2px 4px;
    transition: color 0.2s;
}

.sidebar-action-btn:hover {
    color: var(--text-primary);
}

.sidebar-action-btn.side-delete-btn:hover {
    color: var(--danger-color);
}

.cat-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.cat-delete-btn {
    opacity: 0;
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s, color 0.2s;
}

.category-header:hover .cat-delete-btn {
    opacity: 1;
}

.cat-delete-btn:hover {
    color: var(--danger-color);
}

.card-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.card-action-btn {
    color: var(--text-secondary);
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    transition: color 0.2s;
    padding: 4px;
}

.card-action-btn:hover {
    color: var(--text-primary);
}

.card-action-btn.delete:hover {
    color: var(--danger-color);
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.add-btn {
    width: 100%;
    padding: 12px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.add-btn:hover {
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Main Content Styles */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: radial-gradient(circle at top right, rgba(168, 199, 250, 0.05) 0%, transparent 40%),
                radial-gradient(circle at bottom left, rgba(197, 132, 255, 0.05) 0%, transparent 40%);
    overflow-y: auto;
}

.main-header {
    padding: 40px 48px;
    padding-bottom: 24px;
}

.main-header h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.main-header p {
    color: var(--text-secondary);
    font-size: 16px;
}

.content-area {
    padding: 0 48px 48px 48px;
    flex: 1;
}

/* Welcome Card */
.welcome-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px;
    text-align: center;
    backdrop-filter: blur(10px);
    max-width: 800px;
    margin: 40px auto;
}

.welcome-icon {
    font-size: 48px;
    margin-bottom: 24px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-card h2 {
    font-size: 24px;
    margin-bottom: 12px;
}

.welcome-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 32px;
}

.quick-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
}

.stat-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 24px;
    border-radius: 16px;
    min-width: 160px;
}

.stat-num {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Grid Layout */
.gem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
}

.gem-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.gem-card:hover {
    transform: translateY(-4px);
    background: var(--card-hover);
    border-color: rgba(168, 199, 250, 0.3);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.gem-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 16px;
}

.gem-card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(168, 199, 250, 0.1);
    color: var(--accent-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.gem-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.gem-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    flex: 1;
}

.gem-card-footer {
    margin-top: 24px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.launch-btn {
    background: var(--accent-gradient);
    color: #000;
    border: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    text-decoration: none;
}

.launch-btn:hover {
    background: var(--accent-gradient-hover);
    transform: scale(1.05);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: #18181c;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.4);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    padding: 12px 16px;
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.08);
}

.submit-btn {
    width: 100%;
    background: var(--accent-gradient);
    color: #000;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: opacity 0.2s;
}

.submit-btn:hover {
    opacity: 0.9;
}

.sidebar-tool {
    margin-top: 16px;
    padding: 14px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.03);
}

.sidebar-tool-header {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    margin-bottom: 12px;
}

.sidebar-tool-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(168, 199, 250, 0.12);
    color: var(--accent-color);
    flex-shrink: 0;
}

.sidebar-tool h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.sidebar-tool p {
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.5;
}

.sidebar-tool-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 8px;
    margin-top: 12px;
}

.tool-btn {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.tool-btn:hover {
    background: var(--card-hover);
    border-color: rgba(255, 255, 255, 0.18);
}

.tool-btn:disabled {
    opacity: 0.55;
    cursor: wait;
}

.tool-btn-primary {
    background: var(--accent-gradient);
    color: #000;
    border-color: transparent;
}

.tool-btn-primary:hover:not(:disabled) {
    background: var(--accent-gradient-hover);
}

.sidebar-tool-status {
    margin-top: 12px;
    min-height: 18px;
}