:root {
    --sidebar-width: 260px;
    --topbar-height: 56px;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    position: sticky;
    top: 0;
    border-right: 1px solid var(--bs-border-color);
    transition: transform 0.3s ease;
}

.sidebar-brand {
    color: var(--bs-body-color);
}

.sidebar .nav-link {
    color: var(--bs-body-color);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.9rem;
}

.sidebar .nav-link:hover {
    background-color: var(--bs-tertiary-bg);
}

.sidebar .nav-link.active {
    background-color: var(--bs-primary);
    color: #fff;
}

/* Topbar */
.topbar {
    height: var(--topbar-height);
    background-color: var(--bs-body-bg);
}

/* Main content */
#main-content {
    min-height: 100vh;
}

/* Cards */
.stat-card {
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
}

.stat-card .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
}

.stat-card .stat-label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--bs-secondary-color);
}

/* Stock change colors */
.text-gain {
    color: #10b981;
}

.text-loss {
    color: #ef4444;
}

.bg-gain {
    background-color: rgba(16, 185, 129, 0.1);
}

.bg-loss {
    background-color: rgba(239, 68, 68, 0.1);
}

/* AI Chat */
.ai-chat-container {
    max-height: calc(100vh - 300px);
    overflow-y: auto;
}

.ai-message {
    max-width: 80%;
}

.ai-message.user-message {
    margin-left: auto;
}

.ai-message.assistant-message {
    margin-right: auto;
}

/* News Cards */
.news-card {
    transition: transform 0.15s ease;
}

.news-card:hover {
    transform: translateY(-1px);
}

.news-card .news-image {
    height: 180px;
    object-fit: cover;
}

/* Auth pages */
.auth-container {
    max-width: 420px;
    margin: 0 auto;
    padding-top: 10vh;
}

.auth-card {
    border: none;
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.15);
}

/* Mobile */
@media (max-width: 767.98px) {
    .sidebar {
        position: fixed;
        z-index: 1050;
        transform: translateX(-100%);
    }

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

    .sidebar-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 1040;
        display: none;
    }

    .sidebar-backdrop.show {
        display: block;
    }
}

/* Settings tabs */
.settings-nav .nav-link {
    color: var(--bs-body-color);
    border-radius: 0.375rem;
    padding: 0.5rem 1rem;
}

.settings-nav .nav-link.active {
    background-color: var(--bs-primary);
    color: #fff;
}

/* Tables */
.table-actions .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.8rem;
}

/* Category badges */
.category-badge {
    font-size: 0.75rem;
    font-weight: 500;
}

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--bs-border-color);
    border-right-color: var(--bs-primary);
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}