/* ==================== CSS Variables & Reset ==================== */
:root {
    /* Dark industrial theme */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --bg-elevated: #30363d;
    
    /* Text */
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    
    /* Accent colors */
    --accent-primary: #58a6ff;
    --accent-success: #3fb950;
    --accent-warning: #d29922;
    --accent-danger: #f85149;
    --accent-info: #a371f7;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #58a6ff 0%, #a371f7 100%);
    --gradient-success: linear-gradient(135deg, #3fb950 0%, #56d364 100%);
    --gradient-danger: linear-gradient(135deg, #f85149 0%, #ff7b72 100%);
    
    /* Borders */
    --border-color: #30363d;
    --border-radius: 8px;
    --border-radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 20px rgba(88, 166, 255, 0.3);
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    
    /* Sidebar */
    --sidebar-width: 240px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==================== Layout ==================== */
.app-container {
    display: flex;
    min-height: 100vh;
}

/* ==================== Sidebar ==================== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    font-weight: 700;
    font-size: 1.2rem;
    line-height: 1.2;
}

.logo-text small {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.nav-menu {
    list-style: none;
    padding: var(--spacing-md) 0;
    flex: 1;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background: var(--bg-tertiary);
    color: var(--accent-primary);
    border-left-color: var(--accent-primary);
}

.nav-icon {
    font-size: 1.25rem;
}

.sidebar-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.alert-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gradient-danger);
    border-radius: var(--border-radius);
    font-weight: 600;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ==================== Main Content ==================== */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.search-box input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    padding: var(--spacing-sm) var(--spacing-md);
    width: 300px;
    outline: none;
}

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

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-fast);
}

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

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

/* ==================== Views ==================== */
.view {
    display: none;
}

.view.active {
    display: block;
}

/* ==================== Dashboard ==================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-tertiary);
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

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

.card-alerts {
    grid-column: 1;
}

.card-actions {
    grid-column: 2;
}

.card-recent {
    grid-column: span 2;
}

.card-stats {
    grid-column: span 2;
}

/* Alert Items */
.alert-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--accent-warning);
}

.alert-item.overdue {
    border-left-color: var(--accent-danger);
    background: rgba(248, 81, 73, 0.1);
}

.alert-item.due_today {
    border-left-color: var(--accent-warning);
    background: rgba(210, 153, 34, 0.1);
}

.alert-item-info {
    flex: 1;
}

.alert-item-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.alert-item-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.alert-item-status {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
}

.alert-item-status.overdue {
    background: var(--accent-danger);
    color: white;
}

.alert-item-status.due_today {
    background: var(--accent-warning);
    color: black;
}

/* Action Buttons */
.action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    margin-bottom: var(--spacing-sm);
}

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

.action-btn.primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

.action-btn.secondary:hover {
    background: var(--bg-elevated);
}

.action-icon {
    font-size: 1.25rem;
}

/* Stats */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    text-align: center;
}

.stat-item {
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
}

.stat-value {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* Recent Activity */
.activity-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-info {
    flex: 1;
}

.activity-title {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.activity-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* ==================== Forms ==================== */
.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.2);
}

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

/* Checklist */
.checklist-container {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.checklist-step {
    margin-bottom: var(--spacing-lg);
}

.checklist-step-title {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--accent-primary);
}

.checklist-step-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.checklist-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--accent-success);
}

.checklist-item label {
    flex: 1;
    margin: 0;
    cursor: pointer;
}

.checklist-item.checked label {
    text-decoration: line-through;
    color: var(--text-muted);
}

/* Measurements */
.measurements-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.measurement-input {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.measurement-input label {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.measurement-input input {
    width: 100%;
}

.measurement-range {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.measurement-input.warning input {
    border-color: var(--accent-warning);
}

.measurement-input.error input {
    border-color: var(--accent-danger);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.upload-area:hover {
    border-color: var(--accent-primary);
    background: rgba(88, 166, 255, 0.05);
}

.upload-area.dragover {
    border-color: var(--accent-primary);
    background: rgba(88, 166, 255, 0.1);
}

.upload-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
}

.upload-icon {
    font-size: 2rem;
}

.upload-preview {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.upload-preview-item {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: var(--border-radius);
    overflow: hidden;
}

.upload-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-preview-item .remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: var(--accent-danger);
    border: none;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.btn-primary:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--bg-elevated);
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent-primary);
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-link:hover {
    text-decoration: underline;
}

/* ==================== Procedures Grid ==================== */
.procedures-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.procedure-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: var(--transition-fast);
}

.procedure-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.procedure-card-category {
    font-size: 0.75rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.procedure-card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.procedure-card-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.procedure-card-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--text-muted);
}

.procedure-card-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ==================== Procedure Detail ==================== */
.procedure-detail {
    max-width: 900px;
    margin: 0 auto;
}

.procedure-header {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.procedure-header-category {
    font-size: 0.85rem;
    color: var(--accent-primary);
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.procedure-header-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.procedure-header-description {
    color: var(--text-secondary);
}

.procedure-steps {
    margin-bottom: var(--spacing-lg);
}

.procedure-step {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.procedure-step-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-tertiary);
}

.procedure-step-number {
    width: 40px;
    height: 40px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
}

.procedure-step-title {
    font-weight: 600;
    font-size: 1.1rem;
}

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

.procedure-step-description {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.procedure-step-warning {
    background: rgba(248, 81, 73, 0.1);
    border: 1px solid var(--accent-danger);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    color: var(--accent-danger);
    margin-bottom: var(--spacing-md);
}

.procedure-step-warning::before {
    content: '⚠️ ';
}

.procedure-step-checklist {
    list-style: none;
}

.procedure-step-checklist li {
    padding: var(--spacing-sm) 0;
    color: var(--text-secondary);
}

.procedure-step-checklist li::before {
    content: '☐ ';
    color: var(--accent-primary);
}

.procedure-step-measurement {
    background: var(--bg-tertiary);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

.procedure-step-measurement-label {
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.procedure-step-measurement-range {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.procedure-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* ==================== History ==================== */
.history-container {
    max-width: 1000px;
    margin: 0 auto;
}

.history-filters {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.history-filters input,
.history-filters select {
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 1rem;
}

.history-filters input {
    flex: 1;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition-fast);
}

.history-item:hover {
    border-color: var(--accent-primary);
}

.history-item-info {
    flex: 1;
}

.history-item-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.history-item-meta {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.history-item-status {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: 0.85rem;
    font-weight: 500;
}

.history-item-status.completed {
    background: rgba(63, 185, 80, 0.2);
    color: var(--accent-success);
}

.history-item-status.draft {
    background: rgba(139, 148, 158, 0.2);
    color: var(--text-secondary);
}

.history-item-status.in_progress {
    background: rgba(88, 166, 255, 0.2);
    color: var(--accent-primary);
}

/* ==================== Search Results ==================== */
.search-results h2 {
    margin-bottom: var(--spacing-lg);
}

#searchResults {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ==================== Modal ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
}

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

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transform: scale(0.9);
    transition: var(--transition-normal);
}

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

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

.modal-header h3 {
    font-size: 1.25rem;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: var(--accent-danger);
}

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

/* ==================== Toast Notifications ==================== */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideIn 0.3s ease;
}

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

.toast.success {
    border-left: 4px solid var(--accent-success);
}

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

.toast.warning {
    border-left: 4px solid var(--accent-warning);
}

/* ==================== Loading State ==================== */
.loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.loading::before {
    content: '⏳ ';
}

/* ==================== Empty State ==================== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    
    .logo-text,
    .nav-item span:not(.nav-icon) {
        display: none;
    }
    
    .main-content {
        margin-left: 60px;
    }
    
    .search-box input {
        width: 150px;
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .card-alerts,
    .card-actions,
    .card-recent,
    .card-stats {
        grid-column: 1;
    }
    
    .stat-grid {
        grid-template-columns: 1fr;
    }
}