.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background-color: var(--card-color);
    padding: 30px 20px;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
    transition: width 0.2s ease, padding 0.2s ease;
}

.nav-menu {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: -10px 0 10px 0;
}

.sidebar-header .sidebar-logo {
    flex: 1;
    min-width: 0;
    margin: 0;
}

.sidebar-toggle-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--input-border-color);
    border-radius: 8px;
}

.sidebar-toggle-btn:hover {
    background-color: var(--button-color);
    border-color: var(--button-color);
    color: #fff;
    transform: none;
}

.sidebar-toggle-btn svg {
    width: 18px;
    height: 18px;
    transition: transform 0.2s ease;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background-color: var(--input-bg-color);
    border-radius: 8px;
    transition: background-color 0.3s, transform 0.2s;
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    white-space: nowrap;
}

.nav-item:hover {
    background-color: var(--button-color);
    transform: translateX(5px);
    color: #fff;
}

.nav-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.main-content {
    margin-left: 220px;
    padding: 12px;
    flex: 1;
    transition: margin-left 0.2s ease;
}

.user-profile-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 15px;
    color: var(--text-color);
    font-size: 0.9rem;
    padding: 10px;
    background-color: var(--input-bg-color);
    border-radius: 8px;
    overflow: hidden;
    text-decoration: none;
    transition: background-color 0.3s, transform 0.2s;
}

.user-profile-link:hover {
    background-color: var(--button-color);
    transform: translateX(5px);
    color: #fff;
}

.user-profile-link svg {
    width: 20px;
    height: 20px;
    fill: var(--text-color);
    flex-shrink: 0;
    transition: fill 0.3s;
}

.user-profile-link:hover svg {
    fill: #fff;
}

.user-profile-link span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.nav-bottom {
    margin-top: 30px;
    padding-bottom: 20px;
}

.nav-icon-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.logout-form {
    margin: 0;
}

.logout-btn {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: transparent;
    color: var(--text-color);
    border: 1px solid var(--input-border-color);
    border-radius: 50%;
}

.logout-btn:hover {
    background-color: #c62828;
    border-color: #c62828;
    transform: none;
    color: #fff;
}

.logout-btn svg {
    width: 18px;
    height: 18px;
}

.user-profile-link {
    margin-bottom: 0;
}

.login-prompt {
    text-align: center;
    padding: 60px 20px;
}

.login-link {
    display: inline-block;
    padding: 12px 24px;
    background-color: var(--button-color);
    color: #fff;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    margin-top: 20px;
    transition: background-color 0.3s, transform 0.2s;
}

.login-link:hover {
    background-color: var(--button-hover-color);
    transform: translateY(-2px);
}

/* --------------- Seitenueberschrift (wie "Arbeitsbereiche") --------------- */

.page-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-bottom: 8px;
    margin-bottom: 8px;
    border-bottom: 1px solid var(--input-bg-color);
}

.page-header h3 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
}

.page-header-card {
    padding: 10px 12px;
    background-color: var(--card-color);
    border: 1px solid var(--input-border-color);
    border-radius: 12px;
}

.page-header-card.page-header {
    border-bottom: 1px solid var(--input-border-color);
    margin-bottom: 12px;
}

/* --------------- Reiterleiste im Stil von Mayavii (Arbeitsbereich, Konfiguration) --------------- */

.config-tabs.workspace-tabs {
    display: flex;
    align-items: flex-end;
    gap: 4px;
    margin: 0;
    padding: 8px 8px 0 8px;
    background-color: var(--tab-bar-bg);
    border-top: 1px solid var(--tab-border);
    border-bottom: 2px solid var(--tab-border);
}

.config-tabs.workspace-tabs .tab-link,
.config-tabs.workspace-tabs .subtab-link {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: -2px;
    padding: 6px 16px;
    font-family: inherit;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    white-space: nowrap;
    text-decoration: none;
    color: var(--text-color);
    background-color: var(--tab-inactive-bg);
    border: 2px solid var(--tab-border);
    border-radius: 6px 6px 0 0;
    cursor: pointer;
}

.config-tabs.workspace-tabs .tab-link:hover,
.config-tabs.workspace-tabs .subtab-link:hover {
    color: var(--text-color);
    background-color: var(--card-color);
    border-color: var(--tab-border);
    transform: none;
}

.config-tabs.workspace-tabs .tab-link.active,
.config-tabs.workspace-tabs .subtab-link.active {
    color: var(--text-color);
    background-color: var(--card-color);
    border-color: var(--tab-border);
    border-bottom-color: var(--card-color);
}

.config-tabs.workspace-tabs .tab-link .badge,
.config-tabs.workspace-tabs .tab-link.active .badge,
.config-tabs.workspace-tabs .subtab-link .badge {
    padding: 1px 6px;
    border: none;
    border-radius: 0;
    font-size: 0.65rem;
    font-weight: 700;
    letter-spacing: normal;
    background-color: var(--tab-badge-bg);
    color: var(--tab-badge-text);
}

/* --------------- Eingeklapptes Menue --------------- */

@media (min-width: 601px) {
    html[data-sidebar="collapsed"] .sidebar {
        width: 72px;
        padding: 30px 12px;
    }

    html[data-sidebar="collapsed"] .main-content {
        margin-left: 72px;
    }

    html[data-sidebar="collapsed"] .sidebar-header {
        justify-content: center;
    }

    html[data-sidebar="collapsed"] .sidebar-logo,
    html[data-sidebar="collapsed"] .nav-label,
    html[data-sidebar="collapsed"] .user-profile-link span {
        display: none;
    }

    html[data-sidebar="collapsed"] .sidebar-toggle-btn svg {
        transform: rotate(180deg);
    }

    html[data-sidebar="collapsed"] .nav-item {
        justify-content: center;
        padding: 12px 0;
    }

    html[data-sidebar="collapsed"] .nav-item:hover,
    html[data-sidebar="collapsed"] .user-profile-link:hover {
        transform: none;
    }

    html[data-sidebar="collapsed"] .nav-icon-row {
        flex-direction: column;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 180px;
    }

    .main-content {
        margin-left: 180px;
        padding: 20px;
    }

    .project-title {
        font-size: 2rem;
    }
}

@media (max-width: 600px) {
    .container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 20px;
    }

    .nav-menu {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar-header {
        width: 100%;
    }

    .sidebar-toggle-btn {
        display: none;
    }

    .main-content {
        margin-left: 0;
        padding: 20px;
    }

    .project-title {
        font-size: 1.8rem;
    }
}