.app-container {
    max-width: 1540px;
    margin: 0 auto;
    padding-left: var(--page-padding);
    padding-right: var(--page-padding);
}

.app-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    background-color: var(--surface);
    border-bottom: 1px solid var(--border);
}

.app-header-inner {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.app-header-brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.app-header-title {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
}

.app-header-subtitle {
    font-size: 13px;
    color: var(--text-secondary);
}

.app-header-user {
    display: flex;
    align-items: center;
    gap: 16px;
}

.app-header-username {
    font-size: 14px;
    font-weight: 600;
}

.app-header-action {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background-color: var(--surface);
    transition: border-color 0.15s ease, color 0.15s ease;
}

.app-header-action:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.app-main {
    padding-top: 24px;
    padding-bottom: 32px;
}

.app-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 380px;
    gap: 24px;
    align-items: start;
}

.files-panel {
    background-color: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    min-height: 560px;
    padding: 24px;
}

.quick-panel {
    display: flex;
    flex-direction: column;
    gap: 16px;
}