/* App Layout */
body {
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 24px;
    background-color: var(--surface-elevated);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

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

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo {
    color: var(--primary-color);
    flex-shrink: 0;
}

/* Main Content Area */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    gap: 4px;
    padding: 12px 24px 0;
    background-color: var(--background-color);
    border-bottom: 2px solid var(--border-color);
}

.tab-button {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    bottom: -2px;
}

.tab-button:hover {
    color: var(--text-primary);
    background-color: var(--surface-color);
}

.tab-button.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-icon {
    width: 16px;
    height: 16px;
}

/* Tab Content */
.tab-content-container {
    flex: 1;
    overflow: auto;
    padding: 24px;
    background-color: var(--background-color);
}

.tab-content {
    display: none;
    max-width: 1400px;
    margin: 0 auto;
    animation: fadeIn 0.3s ease;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tab-header {
    margin-bottom: 24px;
}

.tab-header p {
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Status Bar */
.status-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 24px;
    background-color: var(--surface-elevated);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-secondary);
}

.status-left,
.status-right {
    display: flex;
    gap: 16px;
}

/* Responsive Layout */
@media (max-width: 768px) {
    .app-header {
        padding: 12px 16px;
    }

    .header-left h1 {
        font-size: 16px;
    }

    .tab-navigation {
        padding: 8px 16px 0;
        overflow-x: auto;
        overflow-y: hidden;
        -webkit-overflow-scrolling: touch;
    }

    .tab-button {
        padding: 8px 16px;
        font-size: 13px;
        white-space: nowrap;
    }

    .tab-content-container {
        padding: 16px;
    }

    .status-bar {
        padding: 8px 16px;
        font-size: 11px;
    }
}