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

/* Theme Variables */
:root[data-theme="light"] {
    --bg-gradient-1: #667eea;
    --bg-gradient-2: #764ba2;
    --container-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #6c757d;
    --card-bg: #ffffff;
    --card-border: #e9ecef;
    --input-bg: #ffffff;
    --input-border: #e9ecef;
    --tab-bg: #f8f9fa;
    --tab-border: #e9ecef;
    --tab-active: #667eea;
    --modal-bg: #ffffff;
    --modal-overlay: rgba(0, 0, 0, 0.5);
    --stat-bg: #f8f9fa;
    --ausgabe-bg: #f8f9fa;
    --hover-bg: #e9ecef;
    --admin-item-bg: #f8f9fa;
    --admin-item-hover: #e9ecef;
    --header-text: #ffffff;
    --empty-state-bg: #f8f9fa;
    --empty-state-icon: #6c757d;
    --checkbox-bg: #ffffff;
    --checkbox-border: #e9ecef;
    --person-item-bg: #f8f9fa;
    --role-badge-user-bg: #e9ecef;
    --role-badge-user-text: #495057;
}

:root[data-theme="dark"] {
    --bg-gradient-1: #1a1a2e;
    --bg-gradient-2: #16213e;
    --container-bg: #0f1419;
    --text-primary: #e4e6eb;
    --text-secondary: #b0b3b8;
    --card-bg: #1c1e26;
    --card-border: #2d3139;
    --input-bg: #242730;
    --input-border: #3a3d47;
    --tab-bg: #1a1c24;
    --tab-border: #2d3139;
    --tab-active: #667eea;
    --modal-bg: #1c1e26;
    --modal-overlay: rgba(0, 0, 0, 0.7);
    --stat-bg: #242730;
    --ausgabe-bg: #242730;
    --hover-bg: #2d3139;
    --admin-item-bg: #242730;
    --admin-item-hover: #2d3139;
    --header-text: #ffffff;
    --empty-state-bg: #242730;
    --empty-state-icon: #b0b3b8;
    --checkbox-bg: #242730;
    --checkbox-border: #3a3d47;
    --person-item-bg: #242730;
    --role-badge-user-bg: #3a3d47;
    --role-badge-user-text: #b0b3b8;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-1) 0%, var(--bg-gradient-2) 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    transition: background 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: var(--container-bg);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transition: background 0.3s ease;
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--header-text);
    padding: 30px;
    text-align: center;
}

header h1 {
    font-size: 2em;
    font-weight: 600;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.theme-toggle .material-icons {
    font-size: 24px;
}

#currentUser:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Tabs */
.tabs {
    display: flex;
    background: var(--tab-bg);
    border-bottom: 2px solid var(--tab-border);
}

.tab-btn {
    flex: 1;
    padding: 15px 20px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    position: relative;
}

.tab-btn:hover {
    background: var(--admin-item-hover);
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--tab-active);
    background: var(--container-bg);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--tab-active);
}

/* Tab Content */
.tab-content {
    display: none;
    padding: 30px;
}

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

.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: background 0.3s ease;
}

.card h2 {
    margin-bottom: 20px;
    color: var(--text-primary);
    font-size: 1.5em;
    font-weight: 600;
}

/* Forms */
input[type="text"],
input[type="number"],
select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--input-border);
    border-radius: 8px;
    font-size: 16px;
    margin-bottom: 15px;
    transition: border-color 0.3s ease;
    background: var(--input-bg);
    color: var(--text-primary);
    min-height: 48px;
    box-sizing: border-box;
}

select.profile-input {
    padding: 12px 15px;
    padding-right: 40px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    cursor: pointer;
    min-height: 48px;
}

input[type="text"],
input[type="password"] {
    min-height: 48px;
    box-sizing: border-box;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

button {
    padding: 12px 24px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

button:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

button:active {
    transform: translateY(0);
}

.btn-primary {
    width: 100%;
    padding: 15px;
    font-size: 18px;
    background: #667eea;
}

.btn-primary:hover {
    background: #5568d3;
}

/* Person hinzufügen */
.add-person-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.add-person-form input {
    flex: 1;
    margin-bottom: 0;
}

.add-person-form button {
    white-space: nowrap;
}

/* Personen Liste */
.personen-liste {
    display: grid;
    gap: 10px;
}

.person-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px;
    background: var(--person-item-bg);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.person-item:hover {
    background: var(--admin-item-hover);
    transform: translateX(5px);
}

.person-item span {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
}

.person-item button {
    padding: 8px 16px;
    background: #dc3545;
    font-size: 14px;
}

.person-item button:hover {
    background: #c82333;
}

/* Form Groups */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-primary);
}

.checkbox-group {
    display: grid;
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    padding: 12px;
    background: var(--checkbox-bg);
    border: 1px solid var(--checkbox-border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.checkbox-item:hover {
    background: var(--admin-item-hover);
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: 10px;
    cursor: pointer;
}

.checkbox-item label {
    cursor: pointer;
    font-size: 16px;
    margin: 0;
}

/* Ausgaben Liste */
.ausgaben-liste {
    display: grid;
    gap: 15px;
}

/* Statistik-Box */
.stats-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
    font-weight: 500;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

@media (max-width: 600px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .stat-value {
        font-size: 24px;
    }
}

/* Ausgaben Items */
.ausgaben-liste {
    display: grid;
    gap: 15px;
}

.ausgabe-item {
    background: var(--ausgabe-bg);
    border-left: 4px solid #667eea;
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.ausgabe-item.expanded {
    border-left-color: #5a67d8;
}

.ausgabe-header {
    padding: 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s ease;
}

.ausgabe-header:hover {
    background: var(--hover-bg);
}

.ausgabe-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex: 1;
    gap: 15px;
}

.ausgabe-item .beschreibung {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    flex: 1;
}

.ausgabe-item .betrag {
    font-size: 20px;
    font-weight: 700;
    color: #667eea;
    white-space: nowrap;
}

.expand-icon {
    color: var(--text-secondary);
    transition: transform 0.3s ease;
    margin-left: 10px;
}

.ausgabe-item.expanded .expand-icon {
    transform: rotate(180deg);
}

.ausgabe-details {
    padding: 0 15px 15px 15px;
    border-top: 1px solid var(--input-border);
    margin-top: -5px;
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), 
                opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1),
                padding 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.ausgabe-item.expanded .ausgabe-details {
    border-top: 1px solid var(--input-border);
}

.ausgabe-item .details {
    font-size: 14px;
    color: var(--text-secondary);
    display: grid;
    gap: 8px;
    margin-top: 10px;
}

.ausgabe-item button {
    margin-top: 10px;
    padding: 8px 16px;
    background: #dc3545;
    font-size: 14px;
    width: fit-content;
}

/* Übersicht */
.gesamtuebersicht {
    display: grid;
    gap: 15px;
}

.bilanz-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: var(--ausgabe-bg);
    border-radius: 8px;
    border-left: 4px solid transparent;
    transition: background 0.3s ease;
}

.bilanz-item.positiv {
    border-left-color: #28a745;
    background: #d4edda;
}

.bilanz-item.negativ {
    border-left-color: #dc3545;
    background: #f8d7da;
}

.bilanz-item.neutral {
    border-left-color: #6c757d;
}

.bilanz-item .name {
    font-size: 18px;
    font-weight: 600;
}

.bilanz-item .betrag {
    font-size: 20px;
    font-weight: 700;
}

.bilanz-item.positiv .betrag {
    color: #28a745;
}

.bilanz-item.negativ .betrag {
    color: #dc3545;
}

.bilanz-item.neutral .betrag {
    color: #6c757d;
}

/* Dark Mode - Bilanz Items */
:root[data-theme="dark"] .bilanz-item.positiv {
    background: rgba(40, 167, 69, 0.15);
    border-left-color: #28a745;
}

:root[data-theme="dark"] .bilanz-item.positiv .name {
    color: #e0e0e0;
}

:root[data-theme="dark"] .bilanz-item.positiv .betrag {
    color: #5dd879;
}

:root[data-theme="dark"] .bilanz-item.negativ {
    background: rgba(220, 53, 69, 0.15);
    border-left-color: #dc3545;
}

:root[data-theme="dark"] .bilanz-item.negativ .name {
    color: #e0e0e0;
}

:root[data-theme="dark"] .bilanz-item.negativ .betrag {
    color: #ff6b7a;
}

:root[data-theme="dark"] .bilanz-item.neutral .name {
    color: #e0e0e0;
}

:root[data-theme="dark"] .bilanz-item.neutral .betrag {
    color: #adb5bd;
}

/* Ausgleichszahlungen */
.ausgleichszahlungen {
    display: grid;
    gap: 15px;
}

.zahlung-item {
    padding: 15px;
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    border-radius: 8px;
    font-size: 16px;
}

.zahlung-item strong {
    color: #495057;
}

.zahlung-item .betrag {
    font-weight: 700;
    color: #e67e22;
}

/* Dark Mode - Zahlungen */
:root[data-theme="dark"] .zahlung-item {
    background: rgba(255, 193, 7, 0.15);
    border-left-color: #ffc107;
}

:root[data-theme="dark"] .zahlung-item strong {
    color: #e0e0e0;
}

:root[data-theme="dark"] .zahlung-item .betrag {
    color: #ffb84d;
}

/* Detail Bilanz */
.detail-bilanz {
    display: grid;
    gap: 20px;
}

.person-bilanz {
    padding: 20px;
    background: var(--person-item-bg);
    border-radius: 8px;
}

.person-bilanz h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.person-bilanz .stat {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid #dee2e6;
}

.person-bilanz .stat:last-child {
    border-bottom: none;
    margin-top: 10px;
    padding-top: 15px;
    border-top: 2px solid #dee2e6;
    font-weight: 700;
}

/* Leer-Zustand */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    background: var(--empty-state-bg);
    border-radius: 8px;
}

.empty-state p {
    font-size: 18px;
    margin-bottom: 10px;
}

/* Responsive */
@media (max-width: 600px) {
    body {
        padding: 10px;
    }

    .container {
        border-radius: 15px;
    }

    header h1 {
        font-size: 1.5em;
    }

    .tab-content {
        padding: 20px;
    }

    .add-person-form {
        flex-direction: column;
    }

    .add-person-form button {
        width: 100%;
    }
}

/* Admin-Bereich */
.admin-section {
    margin-bottom: 30px;
}

/* Custom Modal/Popup */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--modal-bg);
    border-radius: 15px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: modalSlideIn 0.3s ease;
    transition: background 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: 1.5em;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    color: #dc3545;
    transform: none;
    box-shadow: none;
}

.modal-body {
    margin-bottom: 20px;
}

.modal-body p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 15px;
}

.modal-footer {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.modal-footer button {
    padding: 10px 20px;
}

.btn-secondary {
    background: #6c757d;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-success {
    background: #764ba2;
}

.btn-success:hover {
    background: #653a8b;
}

.btn-info {
    background: #17a2b8;
}

.btn-info:hover {
    background: #138496;
}

/* Admin-Section Styles */
.admin-section {
    margin-bottom: 30px;
}

.admin-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.2em;
}

.admin-user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px;
    background: var(--admin-item-bg);
    border-radius: 8px;
    margin-bottom: 10px;
    gap: 15px;
    transition: all 0.2s ease;
    cursor: move;
}

.admin-user-item:hover {
    background: var(--admin-item-hover);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.admin-user-item.drag-over {
    border: 2px dashed #667eea;
    background: #f0f4ff;
}

.drag-handle {
    cursor: move !important;
}

.btn-icon {
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 4px;
    color: #667eea;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.btn-icon:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: scale(1.1);
}

.btn-icon .material-icons {
    font-size: 18px;
}

.btn-warning {
    background: #ffc107;
    color: #000;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-warning:hover {
    background: #ffb300;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.4);
}

.admin-user-info {
    flex: 1;
}

.admin-user-info .username {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.admin-user-info .user-meta {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 5px;
}

.role-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.role-badge.admin {
    background: #667eea;
    color: white;
}

.role-badge.user {
    background: var(--role-badge-user-bg);
    color: var(--role-badge-user-text);
}

.admin-user-actions {
    display: flex;
    gap: 8px;
}

.admin-user-actions select {
    padding: 8px 12px;
    font-size: 14px;
    margin-bottom: 0;
    width: auto;
}

.admin-user-actions button {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-danger {
    background: #dc3545;
}

.btn-danger:hover {
    background: #c82333;
}

/* Profile Modal Styles */
.profile-tabs {
    display: flex;
    border-bottom: 2px solid var(--tab-border);
    margin-bottom: 20px;
}

.profile-tab-btn {
    flex: 1;
    padding: 12px;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.profile-tab-btn:hover {
    color: var(--text-primary);
}

.profile-tab-btn.active {
    border-bottom-color: #667eea;
    color: #667eea;
}

.profile-input {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--input-border);
    border-radius: 8px;
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 16px;
    margin-bottom: 0;
    min-height: 44px;
    box-sizing: border-box;
}

select.profile-input {
    padding: 12px 15px;
    min-height: 44px;
}

.profile-input:focus {
    outline: none;
    border-color: #667eea;
}

.profile-label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: var(--text-primary);
}

.profile-hint {
    color: var(--text-secondary);
    display: block;
    margin-top: 5px;
    font-size: 14px;
}