/* ============================================================================
   Laboratory Testing PWA - Main Styles
   Modern, Premium Design with Dark Mode
   ============================================================================ */

/* ============================================================================
   CSS Variables (Design Tokens)
   ============================================================================ */
:root {
    /* Colors - Dark Theme */
    --color-bg-primary: #0f0f1e;
    --color-bg-secondary: #1a1a2e;
    --color-bg-tertiary: #16213e;
    --color-bg-elevated: #252545;
    
    /* Accent Colors */
    --color-accent-primary: #4f46e5;
    --color-accent-secondary: #7c3aed;
    --color-accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* Status Colors */
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;
    
    /* Text Colors */
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-disabled: #64748b;
    
    /* Border & Divider */
    --color-border: rgba(255, 255, 255, 0.1);
    --color-divider: rgba(255, 255, 255, 0.05);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================================
   Reset & Base Styles
   ============================================================================ */
*, *::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-sans);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================================================
   Loading Screen
   ============================================================================ */
.loading-screen {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-primary);
    z-index: 9999;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-accent-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-screen p {
    margin-top: var(--spacing-lg);
    color: var(--color-text-secondary);
}

/* ============================================================================
   Login Screen
   ============================================================================ */
.login-container {
    max-width: 420px;
    margin: 0 auto;
    padding: var(--spacing-2xl);
}

.logo {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

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

/* ============================================================================
   Forms
   ============================================================================ */
.form {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 1rem;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

.help-text {
    display: block;
    margin-top: var(--spacing-xs);
    color: var(--color-text-tertiary);
    font-size: 0.75rem;
}

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

.form-section {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-divider);
}

.form-section:last-child {
    border-bottom: none;
}

.form-section h4 {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-primary);
    font-size: 1.125rem;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.input-with-button {
    display: flex;
    gap: var(--spacing-sm);
}

.input-with-button input {
    flex: 1;
}

/* ============================================================================
   Buttons
   ============================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-accent-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

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

.btn-primary:active {
    transform: translateY(0);
}

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

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-accent-primary);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ============================================================================
   Geo Status
   ============================================================================ */
.geo-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.geo-status .icon {
    font-size: 1.25rem;
}

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

.geo-status.success {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
}

.geo-status.error {
    border-color: var(--color-error);
    background: rgba(239, 68, 68, 0.1);
}

/* ============================================================================
   Error Messages
   ============================================================================ */
.error-message {
    padding: var(--spacing-md);
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--color-error);
    border-radius: var(--radius-md);
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--spacing-md);
}

/* ============================================================================
   Header
   ============================================================================ */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

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

/* ============================================================================
   Navigation
   ============================================================================ */
.nav {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    overflow-x: auto;
}

.nav-item {
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

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

.nav-item.active {
    background: var(--color-accent-primary);
    color: white;
}

/* ============================================================================
   Content Area
   ============================================================================ */
.content {
    padding: var(--spacing-xl);
    min-height: calc(100vh - 200px);
}

.view {
    display: none;
}

.view.active {
    display: block;
}

/* ============================================================================
   Records List
   ============================================================================ */
.records-list {
    display: grid;
    gap: var(--spacing-md);
}

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

.record-card:hover {
    border-color: var(--color-accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.record-card-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: var(--spacing-md);
}

.record-number {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-accent-primary);
}

.record-status {
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
}

.record-status.draft {
    background: rgba(100, 116, 139, 0.2);
    color: var(--color-text-tertiary);
}

.record-status.in_progress {
    background: rgba(59, 130, 246, 0.2);
    color: var(--color-info);
}

.record-status.completed {
    background: rgba(16, 185, 129, 0.2);
    color: var(--color-success);
}

.record-info {
    display: grid;
    gap: var(--spacing-sm);
}

.record-info-item {
    display: flex;
    gap: var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.record-info-item strong {
    color: var(--color-text-primary);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-tertiary);
}

/* ============================================================================
   Modal
   ============================================================================ */
.modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-lg);
}

.modal-content {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow: auto;
    box-shadow: var(--shadow-xl);
}

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

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

.modal-close {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

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

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

#camera-preview {
    width: 100%;
    border-radius: var(--radius-md);
    background: black;
}

.geo-info {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    font-family: var(--font-mono);
}

/* ============================================================================
   Toast Notifications
   ============================================================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    min-width: 300px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease-out;
}

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

.toast.success {
    border-color: var(--color-success);
    background: rgba(16, 185, 129, 0.1);
}

.toast.error {
    border-color: var(--color-error);
    background: rgba(239, 68, 68, 0.1);
}

.toast.info {
    border-color: var(--color-info);
    background: rgba(59, 130, 246, 0.1);
}

/* ============================================================================
   Responsive Design
   ============================================================================ */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

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

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }
}

/* ============================================================================
   Utility Classes
   ============================================================================ */
.hidden {
    display: none !important;
}

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }