/* =====================================================
   Vereinstool.ds - Apple-inspired Design System
   ===================================================== */

/* CSS Variables - Design Tokens */
:root {
    /* Primary Colors */
    --color-primary: #007AFF;
    --color-primary-hover: #0056CC;
    --color-primary-light: #E8F2FF;

    /* Status Colors */
    --color-success: #34C759;
    --color-success-light: #E8F9ED;
    --color-warning: #FF9500;
    --color-warning-light: #FFF3E0;
    --color-danger: #FF3B30;
    --color-danger-light: #FFEBEE;
    --color-info: #5AC8FA;
    --color-info-light: #E3F6FD;

    /* Neutrals */
    --color-bg: #F2F2F7;
    --color-surface: #FFFFFF;
    --color-surface-secondary: #F9F9FB;
    --color-border: #E5E5EA;
    --color-border-light: #F0F0F5;
    --color-text: #1D1D1F;
    --color-text-secondary: #6E6E73;
    --color-text-tertiary: #AEAEB2;
    --color-text-inverse: #FFFFFF;

    /* Sidebar */
    --sidebar-width: 260px;
    --sidebar-bg: #1D1D1F;
    --sidebar-text: #FFFFFF;
    --sidebar-text-muted: #98989D;
    --sidebar-hover: rgba(255, 255, 255, 0.08);
    --sidebar-active: rgba(0, 122, 255, 0.2);

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 8px 32px rgba(0, 0, 0, 0.16);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.5;
    overflow: hidden;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* =====================================================
   Layout
   ===================================================== */

.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    color: var(--sidebar-text);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: transform var(--transition-normal);
    z-index: 100;
}

.sidebar-header {
    padding: var(--space-lg);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.sidebar-logo img {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
}

.sidebar-logo-text {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.2px;
}

.sidebar-logo-subtitle {
    font-size: 12px;
    color: var(--sidebar-text-muted);
    margin-top: 2px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-md) var(--space-sm);
    overflow-y: auto;
}

.nav-section {
    margin-bottom: var(--space-lg);
}

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--sidebar-text-muted);
    padding: 0 var(--space-md);
    margin-bottom: var(--space-sm);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: 10px var(--space-md);
    border-radius: var(--radius-sm);
    color: var(--sidebar-text);
    opacity: 0.75;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 14px;
    font-weight: 500;
    user-select: none;
}

.nav-item:hover {
    background: var(--sidebar-hover);
    opacity: 1;
    text-decoration: none;
}

.nav-item.active {
    background: var(--sidebar-active);
    color: var(--color-primary);
    opacity: 1;
}

.nav-item .nav-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
}

.nav-item .nav-badge {
    margin-left: auto;
    background: var(--color-danger);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--space-md);
    border-top: 1px solid rgba(255,255,255,0.06);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.sidebar-user:hover {
    background: var(--sidebar-hover);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.user-info {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 11px;
    color: var(--sidebar-text-muted);
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Top Bar */
.top-bar {
    height: 56px;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    padding: 0 var(--space-lg);
    gap: var(--space-md);
    flex-shrink: 0;
}

.top-bar-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.3px;
}

.top-bar-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 20px;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
}

.menu-toggle:hover {
    background: var(--color-bg);
}

/* Content Area */
.content-area {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
}

/* =====================================================
   Components
   ===================================================== */

/* Cards */
.card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    overflow: hidden;
}

.card-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: -0.2px;
}

.card-body {
    padding: var(--space-lg);
}

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border-light);
    background: var(--color-surface-secondary);
}

/* Stat Cards */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-md);
}

.stat-card {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: box-shadow var(--transition-fast);
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-card-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: var(--space-md);
}

.stat-card-icon.blue { background: var(--color-primary-light); color: var(--color-primary); }
.stat-card-icon.green { background: var(--color-success-light); color: var(--color-success); }
.stat-card-icon.orange { background: var(--color-warning-light); color: var(--color-warning); }
.stat-card-icon.red { background: var(--color-danger-light); color: var(--color-danger); }

.stat-card-value {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.stat-card-label {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.stat-card-change {
    font-size: 12px;
    font-weight: 500;
    margin-top: var(--space-sm);
}

.stat-card-change.positive { color: var(--color-success); }
.stat-card-change.negative { color: var(--color-danger); }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    font-family: var(--font-family);
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
    text-decoration: none;
    line-height: 1.4;
}

.btn:hover { text-decoration: none; }

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
}

.btn-secondary {
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-border);
}

.btn-danger {
    background: var(--color-danger);
    color: white;
}

.btn-danger:hover {
    background: #E0352B;
}

.btn-ghost {
    background: transparent;
    color: var(--color-primary);
}

.btn-ghost:hover {
    background: var(--color-primary-light);
}

.btn-sm {
    padding: 5px 12px;
    font-size: 13px;
}

.btn-lg {
    padding: 12px 24px;
    font-size: 16px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 50%;
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Forms */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
}

.form-label.required::after {
    content: ' *';
    color: var(--color-danger);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 14px;
    font-size: 15px;
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.form-input.error,
.form-select.error {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    font-size: 12px;
    color: var(--color-text-tertiary);
    margin-top: var(--space-xs);
}

.form-error {
    font-size: 12px;
    color: var(--color-danger);
    margin-top: var(--space-xs);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-md);
}

/* Tables */
.table-container {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th {
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-secondary);
    padding: var(--space-md);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
    cursor: pointer;
    user-select: none;
}

.data-table th:hover {
    color: var(--color-text);
}

.data-table th .sort-icon {
    margin-left: 4px;
    opacity: 0.3;
}

.data-table th.sorted .sort-icon {
    opacity: 1;
    color: var(--color-primary);
}

.data-table td {
    padding: var(--space-md);
    border-bottom: 1px solid var(--color-border-light);
    font-size: 14px;
    vertical-align: middle;
}

.data-table tr:hover td {
    background: var(--color-surface-secondary);
}

.data-table tr.clickable {
    cursor: pointer;
}

/* Badges / Tags */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
    white-space: nowrap;
}

.badge-success { background: var(--color-success-light); color: #1B7A2D; }
.badge-warning { background: var(--color-warning-light); color: #A56200; }
.badge-danger { background: var(--color-danger-light); color: #C62828; }
.badge-info { background: var(--color-info-light); color: #0277BD; }
.badge-neutral { background: var(--color-bg); color: var(--color-text-secondary); }

/* Search Bar */
.search-bar {
    position: relative;
    max-width: 400px;
}

.search-bar input {
    width: 100%;
    padding: 9px 14px 9px 38px;
    font-size: 14px;
    font-family: var(--font-family);
    background: var(--color-bg);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    outline: none;
    transition: all var(--transition-fast);
}

.search-bar input:focus {
    background: var(--color-surface);
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.search-bar .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    font-size: 14px;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-md) 0;
}

.pagination-info {
    font-size: 13px;
    color: var(--color-text-secondary);
}

.pagination-controls {
    display: flex;
    gap: var(--space-xs);
}

.pagination-btn {
    padding: 6px 12px;
    font-size: 13px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text);
    transition: all var(--transition-fast);
}

.pagination-btn:hover:not(:disabled) {
    background: var(--color-bg);
}

.pagination-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Modal */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 17px;
    font-weight: 600;
}

.modal-close {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: none;
    background: var(--color-bg);
    color: var(--color-text-secondary);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: var(--space-lg);
    right: var(--space-lg);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-md) var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    min-width: 300px;
    max-width: 450px;
    transform: translateX(110%);
    transition: transform var(--transition-normal);
    border-left: 4px solid var(--color-primary);
}

.toast.show { transform: translateX(0); }
.toast.success { border-left-color: var(--color-success); }
.toast.error { border-left-color: var(--color-danger); }
.toast.warning { border-left-color: var(--color-warning); }

.toast-icon { font-size: 20px; flex-shrink: 0; }
.toast-message { font-size: 14px; flex: 1; }
.toast-close {
    background: none;
    border: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    font-size: 16px;
    padding: 4px;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--color-text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.4;
}

.empty-state-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.empty-state-text {
    font-size: 14px;
    max-width: 400px;
    margin: 0 auto var(--space-lg);
}

/* Loading */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--radius-md);
}

/* Tabs */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.tab-item {
    padding: var(--space-md) 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.tab-item:hover {
    color: var(--color-text);
}

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

/* Detail Page Header */
.detail-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.detail-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--color-primary-light);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 600;
    flex-shrink: 0;
}

.detail-info { flex: 1; }

.detail-name {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.detail-subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

.detail-actions {
    display: flex;
    gap: var(--space-sm);
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-label {
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-text-tertiary);
}

.info-value {
    font-size: 15px;
    color: var(--color-text);
}

/* Login Page */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--space-lg);
}

.login-card {
    background: var(--color-surface);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    padding: var(--space-2xl);
    width: 100%;
    max-width: 420px;
}

.login-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.login-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    background: linear-gradient(135deg, var(--color-primary), #5856D6);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: white;
}

.login-title {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.login-subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: var(--space-xs);
}

/* =====================================================
   Responsive
   ===================================================== */

@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .menu-toggle {
        display: flex;
    }

    .content-area {
        padding: var(--space-md);
    }

    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .stat-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .detail-header {
        flex-direction: column;
    }

    .detail-actions {
        width: 100%;
    }

    .detail-actions .btn {
        flex: 1;
    }

    .top-bar-title {
        font-size: 17px;
    }

    .modal {
        width: 95%;
        max-height: 90vh;
    }

    .data-table {
        font-size: 13px;
    }

    .data-table th,
    .data-table td {
        padding: var(--space-sm) var(--space-md);
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-secondary); }
.text-sm { font-size: 13px; }
.text-xs { font-size: 11px; }
.font-mono { font-family: var(--font-mono); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.hidden { display: none !important; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }