:root {
    --bg-dark: #090d16;
    --panel-bg: rgba(17, 24, 39, 0.7);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(168, 85, 247, 0.3);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent-purple: #a855f7;
    --accent-blue: #3b82f6;
    --accent-green: #10b981;
    --glow-purple: rgba(168, 85, 247, 0.15);
    --glow-blue: rgba(59, 130, 246, 0.15);
    --sidebar-width: 290px;
    --topbar-height: 64px;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(168, 85, 247, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(59, 130, 246, 0.08) 0%, transparent 40%);
    background-attachment: fixed;
}

/* App Shell Layout */
.app-layout {
    display: flex;
    min-height: 100vh;
    width: 100%;
    position: relative;
}

.app-main-viewport {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.app-content-wrapper {
    flex: 1;
    max-width: 1240px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.75rem;
}

/* Animations */
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.2); opacity: 0.6; }
    100% { transform: scale(1); opacity: 1; }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-content {
    display: none;
    animation: fadeIn 0.35s ease-out;
}

.tab-content.active {
    display: block;
}

/* App Footer */
.app-footer {
    padding: 2.5rem 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.85rem;
    background: rgba(9, 13, 22, 0.6);
    backdrop-filter: blur(10px);
    margin-top: 3rem;
}

.app-footer a {
    color: var(--accent-purple);
    text-decoration: none;
    font-weight: 600;
}

.app-footer a:hover {
    text-decoration: underline;
}

/* Responsive Utilities */
@media (max-width: 960px) {
    .app-content-wrapper {
        padding: 1.25rem 1rem;
    }
}