/**
 * Bootstrap 5 Dashboard Theme for RetroVerse
 * Clean, bright, modern styling inspired by Bootstrap Dashboard example
 */

/* ============================================
   COLOR SYSTEM & VARIABLES
   ============================================ */
:root {
    /* Primary Colors */
    --bs-primary: #0d6efd;
    --bs-primary-rgb: 13, 110, 253;
    --bs-secondary: #6c757d;
    --bs-success: #198754;
    --bs-info: #0dcaf0;
    --bs-warning: #ffc107;
    --bs-danger: #dc3545;
    --bs-light: #f8f9fa;
    --bs-dark: #212529;
    --bs-white: #fff;

    /* Grays */
    --bs-gray-100: #f8f9fa;
    --bs-gray-200: #e9ecef;
    --bs-gray-300: #dee2e6;
    --bs-gray-400: #ced4da;
    --bs-gray-500: #adb5bd;
    --bs-gray-600: #6c757d;
    --bs-gray-700: #495057;
    --bs-gray-800: #343a40;
    --bs-gray-900: #212529;

    /* Component Specific */
    --sidebar-width: 280px;
    --sidebar-bg: var(--bs-white);
    --sidebar-border: var(--bs-gray-300);
    --sidebar-hover: var(--bs-gray-100);
    --header-height: 120px;

    --body-bg: var(--bs-gray-100);
    --body-color: var(--bs-gray-900);
    --card-bg: var(--bs-white);

    --text-primary: var(--bs-gray-900);
    --text-secondary: var(--bs-gray-600);
    --text-muted: var(--bs-gray-500);

    --border-color: var(--bs-gray-300);
    --border-radius: 0.375rem;
    --border-radius-lg: 0.5rem;
    --border-radius-sm: 0.25rem;

    /* Shadows */
    --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
}

/* ============================================
   BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 0.9375rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--body-color);
    background-color: var(--body-bg);
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    margin-bottom: 0.5rem;
    font-weight: 500;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 { font-size: 2rem; font-weight: 300; }
h2 { font-size: 1.75rem; font-weight: 300; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

.text-muted { color: var(--text-muted) !important; }
.text-primary { color: var(--bs-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }

/* ============================================
   LAYOUT STRUCTURE
   ============================================ */
.app-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* ============================================
   SIDEBAR NAVIGATION
   ============================================ */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
}

.sidebar-header {
    padding: var(--spacing-lg) var(--spacing-md);
    border-bottom: 1px solid var(--sidebar-border);
    background: var(--bs-white);
}

.sidebar-brand {
    display: flex;
    align-items: center;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 600;
}

.sidebar-brand img {
    width: 36px;
    height: 36px;
    margin-right: var(--spacing-sm);
    border-radius: var(--border-radius);
}

/* Navigation Items */
.sidebar-nav {
    flex: 1;
    padding: var(--spacing-md) 0;
    overflow-y: auto;
}

.nav-section {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.nav-section-title {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    padding-left: var(--spacing-sm);
}

.nav-link {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: 2px;
    color: var(--text-primary);
    text-decoration: none;
    border: 0;
    border-radius: var(--border-radius);
    background: transparent;
    font-size: 0.9375rem;
    transition: all 0.2s ease;
    cursor: pointer;
    width: 100%;
    text-align: left;
}

.nav-link:hover {
    background: var(--sidebar-hover);
    color: var(--bs-primary);
}

.nav-link.active {
    background: rgba(var(--bs-primary-rgb), 0.1);
    color: var(--bs-primary);
    font-weight: 500;
}

.nav-icon {
    width: 1.5rem;
    height: 1.5rem;
    margin-right: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
}

.nav-badge {
    margin-left: auto;
    padding: 0.125rem 0.4rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--bs-gray-200);
    color: var(--text-secondary);
    border-radius: 10rem;
    min-width: 1.5rem;
    text-align: center;
}

.nav-link.active .nav-badge {
    background: var(--bs-primary);
    color: var(--bs-white);
}

/* Module Toggle */
.nav-toggle {
    margin-left: auto;
    padding: 0.125rem 0.375rem;
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    background: var(--bs-gray-200);
    color: var(--text-secondary);
    border: 1px solid transparent;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.nav-toggle:hover {
    background: var(--bs-gray-300);
}

.nav-toggle.enabled {
    background: var(--bs-success);
    color: var(--bs-white);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--sidebar-border);
    background: var(--bs-gray-100);
}

.project-selector {
    width: 100%;
    padding: var(--spacing-sm);
    font-size: 0.875rem;
    border: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius);
    background: var(--bs-white);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--body-bg);
}

.content-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bs-white);
    border-bottom: 1px solid var(--sidebar-border);
    box-shadow: var(--shadow-sm);
}

.content-title {
    font-size: 1.75rem;
    font-weight: 300;
    color: var(--text-primary);
    margin: 0;
}

.content-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
}

/* ============================================
   CARDS & PANELS
   ============================================ */
.card {
    background: var(--card-bg);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-bottom: var(--spacing-lg);
}

.card-header {
    padding: var(--spacing-md);
    background: var(--bs-gray-100);
    border-bottom: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.card-header h3,
.card-header h4 {
    margin: 0;
    font-weight: 500;
    color: var(--text-primary);
}

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

/* Entity List Panel */
#entityList {
    width: 320px;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.list-header {
    padding: var(--spacing-md);
    background: var(--bs-gray-100);
    border-bottom: 1px solid var(--sidebar-border);
    display: flex;
    gap: var(--spacing-sm);
}

.list-header input {
    flex: 1;
    padding: var(--spacing-sm);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius);
    font-size: 0.875rem;
    background: var(--bs-white);
}

.list-header input:focus {
    outline: none;
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}

/* Entity Items */
.entity-items {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.entity-item {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    background: var(--bs-white);
    border: 1px solid var(--sidebar-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9375rem;
}

.entity-item:hover {
    background: var(--bs-gray-100);
    border-color: var(--bs-primary);
    transform: translateX(2px);
}

.entity-item.active {
    background: rgba(var(--bs-primary-rgb), 0.1);
    border-color: var(--bs-primary);
    color: var(--bs-primary);
    font-weight: 500;
}

/* Editor Panel */
#editor {
    flex: 1;
    background: var(--card-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.editor-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bs-gray-100);
    border-bottom: 1px solid var(--sidebar-border);
}

.view-toggle {
    display: inline-flex;
    border-radius: var(--border-radius);
    overflow: hidden;
    border: 1px solid var(--sidebar-border);
}

.view-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bs-white);
    color: var(--text-secondary);
    border: 0;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.view-btn:not(:last-child) {
    border-right: 1px solid var(--sidebar-border);
}

.view-btn:hover {
    background: var(--bs-gray-100);
    color: var(--text-primary);
}

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

.editor-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.editor-actions {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bs-gray-100);
    border-top: 1px solid var(--sidebar-border);
    display: flex;
    gap: var(--spacing-sm);
}

/* ============================================
   BUTTONS - Enhanced Professional Styling
   ============================================ */
.btn {
    display: inline-block;
    font-weight: 500;
    line-height: 1.5;
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.55rem 1.1rem;
    font-size: 0.9rem;
    border-radius: 0.375rem;
    transition: all 0.15s ease-in-out;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.15), 0 2px 4px rgba(0, 0, 0, 0.1);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.12);
}

.btn-primary {
    color: var(--bs-white);
    background: linear-gradient(180deg, #0d6efd 0%, #0b5ed7 100%);
    border-color: #0a58ca;
}

.btn-primary:hover {
    background: linear-gradient(180deg, #3184fd 0%, #0d6efd 100%);
    border-color: #0d6efd;
}

.btn-secondary {
    color: var(--bs-white);
    background: linear-gradient(180deg, #6c757d 0%, #5c636a 100%);
    border-color: #565e64;
}

.btn-secondary:hover {
    background: linear-gradient(180deg, #7d8691 0%, #6c757d 100%);
    border-color: #6c757d;
}

.btn-success {
    color: var(--bs-white);
    background: linear-gradient(180deg, #198754 0%, #157347 100%);
    border-color: #146c43;
}

.btn-success:hover {
    background: linear-gradient(180deg, #1a9759 0%, #198754 100%);
    border-color: #198754;
}

.btn-danger {
    color: var(--bs-white);
    background: linear-gradient(180deg, #dc3545 0%, #bb2d3b 100%);
    border-color: #b02a37;
}

.btn-danger:hover {
    background: linear-gradient(180deg, #e74856 0%, #dc3545 100%);
    border-color: #dc3545;
}

.btn-outline-secondary {
    color: var(--bs-secondary);
    border-color: var(--bs-secondary);
    background: white;
}

.btn-outline-secondary:hover {
    color: var(--bs-white);
    background: linear-gradient(180deg, #6c757d 0%, #5c636a 100%);
    border-color: var(--bs-secondary);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

.btn-lg {
    padding: 0.65rem 1.3rem;
    font-size: 1.05rem;
}

/* ============================================
   FORMS - Enhanced Professional Styling
   ============================================ */
.form-group,
.mb-3 {
    margin-bottom: 1.25rem;
}

.form-label,
label {
    display: inline-block;
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.form-control,
input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
    display: block;
    width: 100%;
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bs-white);
    background-clip: padding-box;
    border: 1px solid #ced4da;
    appearance: none;
    border-radius: 0.375rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.form-control:focus,
input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
    color: var(--text-primary);
    background-color: #fff;
    border-color: #86b7fe;
    outline: 0;
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.15), inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

.form-control:disabled,
.form-control[readonly] {
    background-color: var(--bs-gray-200);
    opacity: 1;
}

select.form-control,
select {
    padding-right: 2.5rem;
    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='%230d6efd' 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 0.75rem center;
    background-size: 16px 12px;
    cursor: pointer;
}

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

.form-check {
    display: block;
    min-height: 1.5rem;
    padding-left: 1.5em;
    margin-bottom: var(--spacing-sm);
}

.form-check-input {
    width: 1em;
    height: 1em;
    margin-top: 0.25em;
    margin-left: -1.5em;
    vertical-align: top;
    background-color: var(--bs-white);
    border: 1px solid var(--sidebar-border);
    border-radius: 0.25em;
    transition: all 0.15s ease-in-out;
}

.form-check-input:checked {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
}

.form-check-label {
    cursor: pointer;
}

.form-text {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ============================================
   TABLES
   ============================================ */
.table {
    width: 100%;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    vertical-align: top;
    border-color: var(--sidebar-border);
}

.table thead th {
    vertical-align: bottom;
    border-bottom: 2px solid var(--sidebar-border);
    padding: var(--spacing-sm);
    font-weight: 600;
    text-align: left;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.table tbody td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--sidebar-border);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.04);
    cursor: pointer;
}

/* ============================================
   ALERTS & MESSAGES
   ============================================ */
.alert {
    position: relative;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
}

.alert-primary {
    color: #004085;
    background-color: #cce5ff;
    border-color: #b8daff;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeaa7;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

/* Message Area */
.message-area {
    position: fixed;
    top: var(--spacing-md);
    right: var(--spacing-md);
    z-index: 2000;
    max-width: 400px;
}

.message {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: var(--bs-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    animation: slideInRight 0.3s ease-out;
}

.message.success {
    border-left: 4px solid var(--bs-success);
}

.message.error {
    border-left: 4px solid var(--bs-danger);
}

.message.info {
    border-left: 4px solid var(--bs-info);
}

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ============================================
   MODALS
   ============================================ */

/* Bootstrap modal backdrop fix */
.modal-backdrop {
    z-index: 1040 !important;
    backdrop-filter: blur(5px);
}

/* Bootstrap modal fixes for proper layering */
.modal {
    z-index: 1050 !important;
}

.modal.show {
    z-index: 1050 !important;
}

.modal.show .modal-dialog {
    z-index: 1055 !important;
}

.modal-dialog {
    z-index: 1055 !important;
}

/* Custom styling for modal content */
.modal-content {
    z-index: 1060 !important;
    position: relative !important;
    background-color: var(--bs-white);
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    animation: modalFadeIn 0.3s ease;
}

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

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

.modal-header h2,
.modal-header h3 {
    margin: 0;
    font-weight: 500;
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--sidebar-border);
}

.close {
    font-size: 1.5rem;
    font-weight: 300;
    line-height: 1;
    color: var(--text-muted);
    text-shadow: none;
    opacity: 0.5;
    cursor: pointer;
    border: 0;
    background: transparent;
}

.close:hover {
    color: var(--text-primary);
    opacity: 0.75;
}

/* ============================================
   BADGES & LABELS
   ============================================ */
.badge {
    display: inline-block;
    padding: 0.25em 0.6em;
    font-size: 0.75rem;
    font-weight: 600;
    line-height: 1;
    color: var(--bs-white);
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: 10rem;
}

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

.badge-secondary {
    background-color: var(--bs-secondary);
}

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

.badge-danger {
    background-color: var(--bs-danger);
}

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

.badge-info {
    background-color: var(--bs-info);
}

/* ============================================
   UTILITIES
   ============================================ */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }
.flex-column { flex-direction: column !important; }
.justify-content-between { justify-content: space-between !important; }
.align-items-center { align-items: center !important; }

.w-100 { width: 100% !important; }
.h-100 { height: 100% !important; }

.m-0 { margin: 0 !important; }
.mt-1 { margin-top: var(--spacing-xs) !important; }
.mt-2 { margin-top: var(--spacing-sm) !important; }
.mt-3 { margin-top: var(--spacing-md) !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--spacing-xs) !important; }
.p-2 { padding: var(--spacing-sm) !important; }
.p-3 { padding: var(--spacing-md) !important; }
.px-2 { padding-left: var(--spacing-sm) !important; padding-right: var(--spacing-sm) !important; }
.py-2 { padding-top: var(--spacing-sm) !important; padding-bottom: var(--spacing-sm) !important; }

.bg-light { background-color: var(--bs-gray-100) !important; }
.bg-white { background-color: var(--bs-white) !important; }

.border { border: 1px solid var(--sidebar-border) !important; }
.border-0 { border: 0 !important; }
.rounded { border-radius: var(--border-radius) !important; }

.shadow-sm { box-shadow: var(--shadow-sm) !important; }
.shadow { box-shadow: var(--shadow) !important; }

/* Font Sizing */
.fs-xlg { font-size: 4rem !important; }

/* Custom Heights */
.h-30 { height: 30px !important; }
.h-35 { height: 35px !important; }
.h-300 { height: 300px !important; }

/* Spinner Sizing */
.spinner-3rem {
    width: 3rem !important;
    height: 3rem !important;
}

/* File Browser */
.file-browser-scrollable {
    height: 300px;
    overflow-y: auto;
}

/* ============================================
   SCROLLBAR STYLING
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bs-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--bs-gray-400);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--bs-gray-500);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: -280px;
        height: 100%;
        z-index: 1045;
        transition: left 0.3s;
    }

    .sidebar.mobile-open {
        left: 0;
        box-shadow: var(--shadow-lg);
    }

    #entityList {
        display: none;
    }

    .content-body {
        padding: var(--spacing-md);
    }
}

/* ============================================
   LOADING & TRANSITIONS
   ============================================ */
.spinner-border {
    display: inline-block;
    width: 1rem;
    height: 1rem;
    vertical-align: text-bottom;
    border: 0.15em solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spinner 0.75s linear infinite;
}

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

.fade-in {
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ============================================
   PROJECT MODAL - Taller to show all content
   ============================================ */
#projectModal .modal-dialog {
    max-height: 90vh;
    margin: 1.75rem auto;
}

#projectModal .modal-content {
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

#projectModal .modal-body {
    overflow-y: auto;
    flex: 1 1 auto;
    max-height: calc(90vh - 120px); /* Subtract header and footer approximate heights */
}