/* ============================================================
   xcaliburStatistik - Admin Theme
   ============================================================ */

/* ----- Custom Properties (Light Mode) ----- */
:root {
    --color-bg: #f5f5f7;
    --color-sidebar: #1a1a2e;
    --color-sidebar-hover: #2a2a4e;
    --color-sidebar-active: #4361ee;
    --color-sidebar-text: #c0c0d0;
    --color-sidebar-text-active: #ffffff;
    --color-card: #ffffff;
    --color-text: #1a1a2e;
    --color-text-secondary: #5a5a7a;
    --color-text-muted: #8a8aa0;
    --color-primary: #4361ee;
    --color-primary-hover: #3651de;
    --color-primary-light: rgba(67, 97, 238, 0.1);
    --color-success: #2ec4b6;
    --color-success-light: rgba(46, 196, 182, 0.1);
    --color-warning: #ff9f1c;
    --color-warning-light: rgba(255, 159, 28, 0.1);
    --color-error: #e71d36;
    --color-error-light: rgba(231, 29, 54, 0.1);
    --color-info: #4361ee;
    --color-info-light: rgba(67, 97, 238, 0.1);
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    --color-table-header: #f0f2f5;
    --color-table-stripe: #fafbfc;
    --color-input-bg: #ffffff;
    --color-input-border: #d0d0d0;
    --color-input-focus: #4361ee;
    --color-overlay: rgba(0, 0, 0, 0.4);
    --color-shadow: rgba(0, 0, 0, 0.08);
    --color-shadow-md: rgba(0, 0, 0, 0.12);

    --sidebar-width: 260px;
    --topbar-height: 56px;
    --radius: 6px;
    --radius-sm: 4px;
    --radius-lg: 8px;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Courier New', monospace;
    --transition-color: 0.3s ease;
    --transition-fast: 0.15s ease;
}

/* ----- Dark Mode ----- */
[data-theme="dark"] {
    --color-bg: #0d1117;
    --color-sidebar: #161b22;
    --color-sidebar-hover: #1c2128;
    --color-sidebar-active: #58a6ff;
    --color-sidebar-text: #8b949e;
    --color-sidebar-text-active: #ffffff;
    --color-card: #21262d;
    --color-text: #e6edf3;
    --color-text-secondary: #8b949e;
    --color-text-muted: #6e7681;
    --color-primary: #58a6ff;
    --color-primary-hover: #79b8ff;
    --color-primary-light: rgba(88, 166, 255, 0.12);
    --color-success: #2ec4b6;
    --color-success-light: rgba(46, 196, 182, 0.12);
    --color-warning: #ff9f1c;
    --color-warning-light: rgba(255, 159, 28, 0.12);
    --color-error: #e71d36;
    --color-error-light: rgba(231, 29, 54, 0.12);
    --color-info: #58a6ff;
    --color-info-light: rgba(88, 166, 255, 0.12);
    --color-border: #30363d;
    --color-border-light: #21262d;
    --color-table-header: #1c2128;
    --color-table-stripe: #161b22;
    --color-input-bg: #161b22;
    --color-input-border: #30363d;
    --color-input-focus: #58a6ff;
    --color-overlay: rgba(0, 0, 0, 0.6);
    --color-shadow: rgba(0, 0, 0, 0.3);
    --color-shadow-md: rgba(0, 0, 0, 0.4);
}

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

html {
    font-size: 14px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.5;
    transition: background-color var(--transition-color), color var(--transition-color);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* ============================================================
   Page Layout (CSS Grid)
   ============================================================ */
.app-layout {
    display: grid;
    grid-template-columns: var(--sidebar-width) 1fr;
    grid-template-rows: 1fr;
    grid-template-areas:
        "sidebar main";
    min-height: 100vh;
}

/* ============================================================
   Sidebar
   ============================================================ */
.sidebar {
    grid-area: sidebar;
    background-color: var(--color-sidebar);
    color: var(--color-sidebar-text);
    width: var(--sidebar-width);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform var(--transition-color);
    overflow-y: auto;
    overflow-x: hidden;
}

.sidebar-header {
    padding: 20px 20px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.sidebar-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.02em;
}

.sidebar-logo-sub {
    font-size: 0.75rem;
    color: var(--color-sidebar-text);
    margin-top: 2px;
    font-weight: 400;
}

.sidebar-nav {
    flex: 1;
    padding: 12px 0;
}

.sidebar-section-label {
    padding: 16px 20px 6px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255, 255, 255, 0.3);
}

.sidebar-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 9px 20px;
    color: var(--color-sidebar-text);
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 400;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    border-left: 3px solid transparent;
    cursor: pointer;
}

.sidebar-link:hover {
    background-color: var(--color-sidebar-hover);
    color: #ffffff;
    text-decoration: none;
}

.sidebar-link.active {
    color: var(--color-sidebar-text-active);
    background-color: var(--color-sidebar-hover);
    border-left-color: var(--color-sidebar-active);
    font-weight: 500;
}

.sidebar-link-icon {
    width: 20px;
    text-align: center;
    font-size: 1rem;
    flex-shrink: 0;
    opacity: 0.7;
}

.sidebar-link.active .sidebar-link-icon {
    opacity: 1;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    flex-shrink: 0;
}

.sidebar-user-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.sidebar-user-info {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.sidebar-user-icon {
    font-size: 1.1rem;
    opacity: 0.5;
    flex-shrink: 0;
}

.sidebar-user-name {
    font-size: 0.82rem;
    color: var(--color-sidebar-text);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.sidebar-theme-toggle {
    width: 30px;
    height: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-sidebar-text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-theme-toggle:hover {
    background-color: var(--color-sidebar-hover);
    color: #ffffff;
}

.sidebar-logout-btn {
    width: 30px;
    height: 30px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-sidebar-text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    text-decoration: none;
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.sidebar-logout-btn:hover {
    background-color: rgba(231, 29, 54, 0.2);
    color: var(--color-error);
    text-decoration: none;
}

.sidebar-copyright {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
    letter-spacing: 0.02em;
}

/* ============================================================
   Topbar
   ============================================================ */
.topbar {
    display: none;
}

.topbar-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--color-text);
}

/* Theme Toggle */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-input-bg);
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* Sun/moon icons via content */
.theme-toggle::before {
    content: "\263E"; /* moon */
}

[data-theme="dark"] .theme-toggle::before {
    content: "\2600"; /* sun */
}

/* Hamburger */
.hamburger {
    display: none;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-input-bg);
    color: var(--color-text);
    cursor: pointer;
    font-size: 1.2rem;
    transition: background-color var(--transition-fast);
}

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

.hamburger::before {
    content: "\2630"; /* trigram / hamburger */
}

/* ============================================================
   Main Content
   ============================================================ */
.main-content {
    grid-area: main;
    padding: 24px;
    overflow-x: hidden;
    min-width: 0;
}

.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    flex-wrap: wrap;
    gap: 12px;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.page-subtitle {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin-top: 2px;
}

/* ============================================================
   Cards
   ============================================================ */
.card {
    background-color: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 1px 3px var(--color-shadow);
    transition: background-color var(--transition-color), border-color var(--transition-color), box-shadow var(--transition-color);
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--color-border);
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    line-height: 1.4;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background-color: var(--color-card);
    color: var(--color-text);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn:hover {
    background-color: var(--color-table-header);
    border-color: var(--color-input-border);
    text-decoration: none;
}

.btn:active {
    transform: translateY(1px);
}

.btn:disabled,
.btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
}

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

.btn-success {
    background-color: var(--color-success);
    border-color: var(--color-success);
    color: #ffffff;
}

.btn-success:hover {
    opacity: 0.9;
}

.btn-danger {
    background-color: var(--color-error);
    border-color: var(--color-error);
    color: #ffffff;
}

.btn-danger:hover {
    opacity: 0.9;
}

.btn-sm {
    padding: 4px 10px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 10px 24px;
    font-size: 1rem;
}

.btn-icon {
    padding: 6px;
    width: 32px;
    height: 32px;
}

.btn-group {
    display: inline-flex;
    gap: 0;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-radius: var(--radius) 0 0 var(--radius);
}

.btn-group .btn:last-child {
    border-radius: 0 var(--radius) var(--radius) 0;
}

.btn-group .btn + .btn {
    margin-left: -1px;
}

/* ============================================================
   Forms
   ============================================================ */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 4px;
}

.form-input,
.form-select,
.form-textarea {
    display: block;
    width: 100%;
    padding: 8px 12px;
    font-size: 0.875rem;
    font-family: inherit;
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-input-bg);
    border: 1px solid var(--color-input-border);
    border-radius: var(--radius);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-color);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-input-focus);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

[data-theme="dark"] .form-input:focus,
[data-theme="dark"] .form-select:focus,
[data-theme="dark"] .form-textarea:focus {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

.form-input::placeholder {
    color: var(--color-text-muted);
}

.form-input.is-invalid {
    border-color: var(--color-error);
}

.form-input.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(231, 29, 54, 0.15);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23666' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 12px;
    padding-right: 32px;
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

.form-checkbox {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.875rem;
}

.form-checkbox input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--color-primary);
    cursor: pointer;
}

.form-help {
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.form-error {
    font-size: 0.78rem;
    color: var(--color-error);
    margin-top: 4px;
}

.form-inline {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    flex-wrap: wrap;
}

.form-inline .form-group {
    margin-bottom: 0;
}

/* ============================================================
   Alerts / Flash Messages
   ============================================================ */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 16px;
    border: 1px solid transparent;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    transition: opacity 0.3s ease, transform 0.3s ease;
    position: relative;
    z-index: 50;
}

.alert-dismissing {
    opacity: 0;
    transform: translateY(-8px);
}

.alert-success {
    background-color: var(--color-success-light);
    color: var(--color-success);
    border-color: var(--color-success);
}

.alert-error {
    background-color: var(--color-error-light);
    color: var(--color-error);
    border-color: var(--color-error);
}

.alert-warning {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
    border-color: var(--color-warning);
}

.alert-info {
    background-color: var(--color-info-light);
    color: var(--color-info);
    border-color: var(--color-info);
}

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    opacity: 0.6;
    padding: 0;
}

.alert-close:hover {
    opacity: 1;
}

/* ============================================================
   Tables
   ============================================================ */
.table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
}

.table th {
    background-color: var(--color-table-header);
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 10px 14px;
    text-align: left;
    white-space: nowrap;
    border-bottom: 2px solid var(--color-border);
    transition: background-color var(--transition-color);
}

.table td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-border);
    color: var(--color-text);
    transition: background-color var(--transition-color), border-color var(--transition-color);
    vertical-align: middle;
}

.table tbody tr:hover td {
    background-color: var(--color-primary-light);
}

.table .text-right {
    text-align: right;
}

.table .text-center {
    text-align: center;
}

.table .text-mono {
    font-family: var(--font-mono);
}

/* ============================================================
   Badges
   ============================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: 0.72rem;
    font-weight: 600;
    border-radius: 10px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.badge-admin {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.badge-user {
    background-color: var(--color-table-header);
    color: var(--color-text-secondary);
}

.badge-success {
    background-color: var(--color-success-light);
    color: var(--color-success);
}

.badge-warning {
    background-color: var(--color-warning-light);
    color: var(--color-warning);
}

.badge-error {
    background-color: var(--color-error-light);
    color: var(--color-error);
}

/* ============================================================
   Date Range Bar
   ============================================================ */
.date-range-bar {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 12px;
}

.date-range-group {
    display: flex;
    align-items: center;
    gap: 0;
    background: var(--color-input-bg);
    border: 1px solid var(--color-input-border);
    border-radius: var(--radius-lg);
    padding: 2px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.date-range-group:focus-within {
    border-color: var(--color-input-focus);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

[data-theme="dark"] .date-range-group:focus-within {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.1);
}

.date-range-field {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 4px 4px 4px 10px;
    border-radius: var(--radius);
}

.date-range-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    white-space: nowrap;
    user-select: none;
    min-width: 24px;
}

.date-range-selects {
    display: flex;
    gap: 2px;
}

.date-range-select {
    appearance: none;
    -webkit-appearance: none;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 5px 22px 5px 8px;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%236e7681' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 6l4 4 4-4'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 4px center;
    background-size: 12px;
}

.date-range-select:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-input-border);
}

.date-range-select:focus {
    outline: none;
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
}

.date-range-month {
    min-width: 110px;
}

.date-range-year {
    min-width: 70px;
}

.date-range-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    padding: 0 4px;
    flex-shrink: 0;
}

.date-range-actions {
    display: flex;
    gap: 6px;
    margin-left: auto;
}

@media (max-width: 768px) {
    .date-range-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .date-range-group {
        flex-wrap: wrap;
    }

    .date-range-field {
        flex: 1;
        min-width: 0;
    }

    .date-range-actions {
        margin-left: 0;
    }

    .date-range-actions .btn {
        flex: 1;
    }
}

/* ============================================================
   Statistics Tree Table
   ============================================================ */
.tree-table-controls {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.tree-table-controls .form-group {
    margin-bottom: 0;
}

.tree-table-container {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    background-color: var(--color-card);
    transition: background-color var(--transition-color), border-color var(--transition-color);
}

.tree-table {
    width: max-content;
    min-width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.tree-table thead {
    position: sticky;
    top: 0;
    z-index: 10;
}

.tree-table th {
    background-color: var(--color-table-header);
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 8px 10px;
    text-align: center;
    white-space: nowrap;
    border-bottom: 2px solid var(--color-border);
    border-right: 1px solid var(--color-border);
    transition: background-color var(--transition-color), border-color var(--transition-color);
}

.tree-table th:last-child {
    border-right: none;
}

.tree-table th.sticky-col {
    text-align: left;
}

.tree-table th.month-group {
    border-bottom: 1px solid var(--color-border);
    font-size: 0.78rem;
    text-transform: none;
    letter-spacing: normal;
    font-weight: 700;
}

.tree-table th.sub-header {
    font-size: 0.68rem;
    padding: 4px 8px;
}

.tree-table td {
    padding: 6px 10px;
    border-bottom: 1px solid var(--color-border-light);
    border-right: 1px solid var(--color-border-light);
    color: var(--color-text);
    transition: background-color var(--transition-color), border-color var(--transition-color);
    vertical-align: top;
}

.tree-table td:last-child {
    border-right: none;
}

/* Sticky first column */
.tree-table .sticky-col {
    position: sticky;
    left: 0;
    z-index: 5;
    background-color: var(--color-card);
    min-width: 250px;
    max-width: 350px;
    width: 280px;
    border-right: 2px solid var(--color-border);
    /* relative for tree connector positioning */
    transition: background-color var(--transition-color), border-color var(--transition-color);
}

.tree-table thead .sticky-col {
    z-index: 15;
    background-color: var(--color-table-header);
}

/* Number cells */
.tree-table .number-cell {
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    min-width: 100px;
    white-space: nowrap;
}

.tree-table .number-cell .value {
    line-height: 1.3;
}

.tree-table .number-cell .percentage {
    font-size: 0.68rem;
    color: var(--color-text-muted);
    font-weight: 400;
    line-height: 1.2;
}

/* Tree rows */
.tree-row {
    transition: background-color var(--transition-fast);
}

.tree-row:hover td {
    background-color: var(--color-primary-light);
    position: relative;
    z-index: 0;
}

.tree-row:hover .sticky-col {
    background-color: var(--color-primary-light);
    z-index: 5;
}

.tree-row[data-level="0"] td {
    font-weight: 500;
}

.tree-row-indent {
    display: inline-block;
}

.tree-row-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: none;
    background: none;
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: 0.7rem;
    padding: 0;
    margin-right: 4px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast), color var(--transition-fast);
    flex-shrink: 0;
    vertical-align: middle;
}

.tree-row-toggle:hover {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.tree-row-toggle.expanded {
    color: var(--color-primary);
}

.tree-row-name {
    vertical-align: middle;
}

.tree-row-dim-label {
    font-size: 0.68rem;
    color: var(--color-text-muted);
    margin-left: 6px;
    font-weight: 400;
    font-style: italic;
}

/* Gesamt row */
.tree-row-gesamt td {
    font-weight: 700;
    background-color: var(--color-table-header);
}

.tree-row-gesamt .sticky-col {
    background-color: var(--color-table-header);
}

/* Totals row */
.tree-row-totals td {
    font-weight: 700;
    border-top: 2px solid var(--color-border);
    background-color: var(--color-table-header);
}

.tree-row-totals .sticky-col {
    background-color: var(--color-table-header);
}

/* Tree connector lines */
.tree-cell-content {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0;
}

.tree-cell-content .tree-row-name {
    flex: 1;
    min-width: 0;
}

.tree-guide,
.tree-branch {
    position: absolute;
    top: -1px;
    bottom: -1px;
    width: 0;
    border-left: 2px solid var(--color-border);
    pointer-events: none;
}

.tree-branch::after {
    content: '';
    position: absolute;
    top: 15px;
    left: -2px;
    width: 11px;
    border-bottom: 2px solid var(--color-border);
}

.tree-branch-last {
    bottom: auto;
    height: 17px;
}

.tree-branch-last::after {
    top: auto;
    bottom: -1px;
}

/* Stacked cell layout (EK/VK/Menge/Kalk untereinander) */
.stacked-cell {
    vertical-align: top;
    padding: 4px 8px !important;
    min-width: 200px;
}

.stacked-row {
    display: flex;
    justify-content: space-between;
    gap: 8px;
    line-height: 1.5;
}

.stacked-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    white-space: nowrap;
}

.stacked-value {
    text-align: right;
    white-space: nowrap;
}

.stacked-pct {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

/* Tree sub-controls (select & filter below node name) */
.tree-sub-controls {
    padding-top: 6px;
    padding-bottom: 2px;
}

/* Dimension select dropdown */
.tree-dim-select {
    padding: 5px 28px 5px 10px;
    font-size: 0.78rem;
    font-family: inherit;
    font-weight: 500;
    border: 1px solid var(--color-input-border);
    border-radius: var(--radius);
    background-color: var(--color-input-bg);
    color: var(--color-text);
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23666' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 8px center;
    background-size: 10px;
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.tree-dim-select:hover {
    border-color: var(--color-primary);
    background-color: var(--color-primary-light);
}

.tree-dim-select:focus {
    outline: none;
    border-color: var(--color-input-focus);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.15);
}

[data-theme="dark"] .tree-dim-select:focus {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

/* Filter wrap */
.tree-filter-wrap {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: var(--color-table-header);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius);
    padding: 3px 8px 3px 8px;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.tree-filter-wrap:focus-within {
    border-color: var(--color-input-focus);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.10);
    background-color: var(--color-input-bg);
}

[data-theme="dark"] .tree-filter-wrap:focus-within {
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.10);
}

.tree-filter-icon {
    color: var(--color-text-muted);
    flex-shrink: 0;
    transition: color var(--transition-fast);
}

.tree-filter-wrap:focus-within .tree-filter-icon {
    color: var(--color-primary);
}

.tree-filter-input {
    width: 110px;
    padding: 2px 0;
    font-size: 0.78rem;
    font-family: inherit;
    border: none;
    background: transparent;
    color: var(--color-text);
    outline: none;
}

.tree-filter-input::placeholder {
    color: var(--color-text-muted);
    opacity: 0.7;
}

.tree-filter-count {
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.tree-filter-clear {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    padding: 0;
    margin-left: 2px;
    background: var(--color-border-light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.8rem;
    line-height: 1;
    color: var(--color-text-muted);
    transition: background-color var(--transition-fast), color var(--transition-fast);
}

.tree-filter-clear:hover {
    background-color: var(--color-error-light);
    color: var(--color-error);
}

/* Month columns container */
.month-columns {
    display: contents;
}

/* Month separator */
.tree-table .month-separator {
    border-right: 2px solid var(--color-border);
}

/* Loading overlay for tree */
.tree-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.tree-loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin-right: 10px;
}

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

.tree-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ============================================================
   Pagination
   ============================================================ */
.pagination {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 16px;
    justify-content: center;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    text-decoration: none;
    color: var(--color-text);
    transition: background-color var(--transition-fast), border-color var(--transition-fast);
}

.pagination a:hover {
    background-color: var(--color-primary-light);
    border-color: var(--color-primary);
    text-decoration: none;
}

.pagination .active {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    font-weight: 600;
}

/* ============================================================
   Utilities
   ============================================================ */
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-primary { color: var(--color-primary); }
.text-right { text-align: right; }
.text-center { text-align: center; }
.text-sm { font-size: 0.82rem; }
.text-xs { font-size: 0.72rem; }
.text-mono { font-family: var(--font-mono); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex-wrap { flex-wrap: wrap; }

.hidden { display: none !important; }

/* === Inline-Style Replacements === */

/* statistics/index.php */
.tree-toggle-spacer { display: inline-block; width: 24px; flex-shrink: 0; }
.stacked-value-bold { font-weight: 600; }
.tree-table-container--borderless { border: none; }
.btn-icon-gap svg { margin-right: 4px; }

/* dashboard/index.php */
.dashboard-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; }
.stat-value { font-size: 2rem; font-weight: 700; }
.stat-label { font-size: 1.15rem; font-weight: 600; margin-top: 6px; }
.sync-status { margin-top: 8px; color: var(--color-success); font-size: 0.85rem; font-weight: 500; }
.sync-dot { display: inline-block; width: 8px; height: 8px; background: var(--color-success); border-radius: 50%; margin-right: 6px; animation: pulse 1.5s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

/* Dashboard card change highlight */
.card-changed {
    animation: card-flash 1.5s ease;
}

@keyframes card-flash {
    0%   { background-color: var(--color-card); }
    15%  { background-color: var(--color-primary-light); }
    100% { background-color: var(--color-card); }
}

/* auth/twofactor.php */
.text-left { text-align: left; }
.btn-full { width: 100%; }
.resend-link { display: inline-block; margin-top: 16px; font-size: 0.85rem; }

/* users/edit.php + create.php */
.form-card-narrow { max-width: 600px; }
.form-divider { margin: 20px 0; border: none; border-top: 1px solid var(--color-border); }

/* users/index.php */
.form-inline-hidden { display: inline; }
.empty-state-body { padding: 24px; }

/* ============================================================
   Overlay for mobile sidebar
   ============================================================ */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: var(--color-overlay);
    z-index: 99;
    opacity: 0;
    transition: opacity var(--transition-color);
}

.sidebar-overlay.active {
    display: block;
    opacity: 1;
}

/* ============================================================
   Login page
   ============================================================ */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
    background-color: var(--color-bg);
}

.login-card {
    width: 100%;
    max-width: 400px;
}

.login-card .card-body {
    padding: 32px;
}

.login-title {
    font-size: 1.25rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 8px;
}

.login-subtitle {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    text-align: center;
    margin-bottom: 24px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
    .app-layout {
        grid-template-columns: 1fr;
        grid-template-rows: var(--topbar-height) 1fr;
        grid-template-areas:
            "topbar"
            "main";
    }

    .topbar {
        grid-area: topbar;
        display: flex;
        align-items: center;
        gap: 12px;
        position: sticky;
        top: 0;
        z-index: 90;
        height: var(--topbar-height);
        background-color: var(--color-card);
        border-bottom: 1px solid var(--color-border);
        padding: 0 16px;
        transition: background-color var(--transition-color), border-color var(--transition-color);
    }

    .sidebar {
        transform: translateX(-100%);
        box-shadow: 4px 0 24px var(--color-shadow-md);
    }

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

    .hamburger {
        display: inline-flex;
    }

    .topbar {
        padding: 0 16px;
    }

    .main-content {
        padding: 16px;
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .tree-table-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .tree-table .sticky-col {
        min-width: 180px;
        width: 200px;
    }

    .form-inline {
        flex-direction: column;
        align-items: stretch;
    }

    .form-inline .form-group {
        width: 100%;
    }

    .form-inline .form-input,
    .form-inline .form-select {
        width: 100%;
    }

    .topbar-user {
        display: none;
    }
}

@media (max-width: 480px) {
    .dimension-buttons {
        flex-direction: column;
    }

    .dimension-buttons .btn {
        width: 100%;
    }

    .tree-table .sticky-col {
        min-width: 150px;
        width: 160px;
    }
}

/* ============================================================
   Print
   ============================================================ */
@media print {
    .sidebar,
    .topbar,
    .hamburger,
    .theme-toggle,
    .sidebar-overlay,
    .tree-row-toggle,
    .tree-sub-controls,
    .btn {
        display: none !important;
    }

    .app-layout {
        grid-template-columns: 1fr;
        grid-template-areas: "main";
    }

    .main-content {
        padding: 0;
    }

    .card {
        box-shadow: none;
        border: 1px solid #ccc;
    }

    .tree-table .sticky-col {
        position: static;
    }

    body {
        color: #000;
        background: #fff;
    }
}