/* CSS Variables for consistent theming */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-secondary: #64748b;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Neutral colors */
    --color-white: #ffffff;
    --color-gray-50: #f8fafc;
    --color-gray-100: #f1f5f9;
    --color-gray-200: #e2e8f0;
    --color-gray-300: #cbd5e1;
    --color-gray-400: #94a3b8;
    --color-gray-500: #64748b;
    --color-gray-600: #475569;
    --color-gray-700: #334155;
    --color-gray-800: #1e293b;
    --color-gray-900: #0f172a;
    
    /* Typography */
    --font-family-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
}

/* Reset and base styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    line-height: 1.5;
}

body {
    font-family: var(--font-family-base);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    min-height: 100vh;
}

/* Layout components using CSS Grid and Flexbox */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-4);
    min-height: 100vh;
    display: grid;
    grid-template-rows: auto 1fr;
    gap: var(--spacing-8);
}

.header {
    text-align: center;
    padding: var(--spacing-8) 0;
}

.header__title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.header__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* Navigation */
.nav {
    display: flex;
    justify-content: flex-start;
    margin-bottom: var(--spacing-6);
}

.nav__link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav__link:hover {
    background-color: var(--color-gray-100);
    color: var(--color-primary-hover);
}

/* Card component */
.card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-8);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-gray-200);
}

.card__title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
}

.card__description {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-6);
    line-height: 1.7;
}

/* Form components */
.form-group {
    margin-bottom: var(--spacing-6);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-2);
}

.form-input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgb(37 99 235 / 0.1);
}

/* Button component */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px; /* Accessibility: minimum touch target */
}

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

.btn--primary:hover:not(:disabled) {
    background-color: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Utility classes */
.hidden {
    display: none;
}

.section-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-6);
}

/* Assessment specific styles */
.assessment {
    max-width: 700px;
    margin: 0 auto;
}

.results {
    max-width: 700px;
    margin: 0 auto;
}

/* Questions container */
.questions-container {
    margin-bottom: var(--spacing-6);
}

.question-group {
    margin-bottom: var(--spacing-8);
    opacity: 0;
    transform: translateY(20px);
    animation: slideInUp 0.6s ease-out forwards;
}

.question-group:nth-child(1) { animation-delay: 0.1s; }
.question-group:nth-child(2) { animation-delay: 0.2s; }
.question-group:nth-child(3) { animation-delay: 0.3s; }
.question-group:nth-child(4) { animation-delay: 0.4s; }
.question-group:nth-child(5) { animation-delay: 0.5s; }

@keyframes slideInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.question-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-4);
    line-height: 1.4;
}

.question-options {
    display: grid;
    gap: var(--spacing-3);
}

.option-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.option-label:hover {
    border-color: var(--color-primary);
    background: var(--color-gray-50);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.option-label input[type="radio"] {
    margin: 0;
    width: 20px;
    height: 20px;
    accent-color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.option-label input[type="radio"]:checked + span {
    color: var(--color-primary);
    font-weight: 500;
}

.option-label:has(input[type="radio"]:checked) {
    border-color: var(--color-primary);
    background: rgba(37, 99, 235, 0.05);
}

.option-label span {
    line-height: 1.5;
    color: var(--color-gray-700);
    transition: color var(--transition-fast);
}

/* Form validation */
.form-validation {
    margin-bottom: var(--spacing-4);
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    background: var(--color-error);
    color: var(--color-white);
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.validation-message {
    margin: 0;
    font-weight: 500;
}

/* Enhanced button styles */
.btn--large {
    padding: var(--spacing-4) var(--spacing-8);
    font-size: var(--font-size-lg);
    min-height: 56px;
}

.btn--secondary {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    border: 1px solid var(--color-gray-300);
}

.btn--secondary:hover {
    background: var(--color-gray-200);
    color: var(--color-gray-800);
}

.btn-loading {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.btn-arrow {
    margin-left: var(--spacing-2);
    transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

.btn--ready {
    background: var(--color-success) !important;
    transform: scale(1.02);
}

.btn--ready:hover {
    background: #059669 !important;
}

/* Results section styles */
.card--result {
    text-align: center;
    animation: fadeInScale 0.8s ease-out;
}

@keyframes fadeInScale {
    0% {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.result-header {
    margin-bottom: var(--spacing-6);
}

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

.project-recommendation {
    text-align: left;
    margin-bottom: var(--spacing-8);
}

.project-card {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    margin-bottom: var(--spacing-4);
}

.project-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
}

.skill-explanation {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-4);
    padding: var(--spacing-3) var(--spacing-4);
    background: rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

.project-description {
    color: var(--color-gray-700);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
}

.project-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

.meta-icon {
    width: 16px;
    height: 16px;
    opacity: 0.7;
}

.tech-stack {
    background: var(--color-gray-100);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
}

.estimated-time {
    background: var(--color-success);
    color: var(--color-white);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.milestone-preview {
    margin-top: var(--spacing-4);
}

.milestone-preview h4 {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-800);
    margin-bottom: var(--spacing-2);
}

.milestone-list {
    list-style: none;
    padding: 0;
}

.milestone-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) 0;
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
}

.milestone-item::before {
    content: "✓";
    color: var(--color-success);
    font-weight: bold;
    width: 16px;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    align-items: center;
}

/* Smooth transitions for section changes */
.assessment, .results {
    transition: all var(--transition-normal);
}

.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

.visible {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

/* Project dashboard styles */
.project-dashboard {
    display: grid;
    gap: var(--spacing-8);
}

.progress-overview {
    margin-bottom: var(--spacing-4);
}

.progress-bar {
    width: 100%;
    height: 12px;
    background-color: var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: var(--spacing-3);
}

.progress-bar__fill {
    height: 100%;
    background-color: var(--color-success);
    transition: width var(--transition-normal);
    border-radius: var(--radius-lg);
}

.progress-text {
    font-weight: 500;
    color: var(--color-gray-700);
    text-align: center;
}

.milestones-container {
    /* Grid layout will be added when milestones are implemented */
}

.milestones-list {
    display: grid;
    gap: var(--spacing-4);
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-3);
        gap: var(--spacing-6);
    }
    
    .header {
        padding: var(--spacing-6) 0;
    }
    
    .header__title {
        font-size: var(--font-size-3xl);
    }
    
    .card {
        padding: var(--spacing-6);
    }
    
    .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .header__title {
        font-size: var(--font-size-2xl);
    }
    
    .card {
        padding: var(--spacing-4);
    }
    
    .question-title {
        font-size: var(--font-size-base);
    }
    
    .option-label {
        padding: var(--spacing-3);
        font-size: var(--font-size-sm);
    }
    
    .result-actions {
        gap: var(--spacing-4);
    }
    
    .project-meta {
        flex-direction: column;
        gap: var(--spacing-2);
    }
}
/* 
Enhanced Project Dashboard Styles */
.project-dashboard {
    display: grid;
    gap: var(--spacing-8);
    max-width: 1000px;
    margin: 0 auto;
}

/* Enhanced Progress Overview */
.card--progress {
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    border: 2px solid var(--color-gray-100);
    position: relative;
    overflow: hidden;
}

.card--progress::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-6);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.progress-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.stat-label {
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 500;
}

.stat-divider {
    color: var(--color-gray-400);
    font-weight: 500;
    margin: 0 var(--spacing-2);
}

.progress-visual {
    margin-bottom: var(--spacing-6);
}

/* Enhanced Progress Bar with Animation */
.progress-bar {
    width: 100%;
    height: 16px;
    background-color: var(--color-gray-200);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin-bottom: var(--spacing-3);
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-bar__fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-success) 100%);
    transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius-xl);
    position: relative;
    overflow: hidden;
}

.progress-bar__shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.4) 50%, 
        transparent 100%
    );
    animation: shine 2s ease-in-out infinite;
}

@keyframes shine {
    0% { left: -100%; }
    50% { left: 100%; }
    100% { left: 100%; }
}

.progress-text {
    font-weight: 600;
    color: var(--color-gray-700);
    text-align: center;
    font-size: var(--font-size-lg);
}

.progress-encouragement {
    padding: var(--spacing-4);
    background: rgba(37, 99, 235, 0.05);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
}

.encouragement-text {
    color: var(--color-primary);
    font-weight: 500;
    text-align: center;
    margin: 0;
}

/* Milestones Header */
.milestones-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.milestones-subtitle {
    color: var(--color-gray-600);
    font-size: var(--font-size-lg);
    margin-top: var(--spacing-2);
}

/* Enhanced Milestones Grid */
.milestones-grid {
    display: grid;
    gap: var(--spacing-6);
    grid-template-columns: 1fr;
}

/* Milestone Card */
.milestone-card {
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-xl);
    padding: var(--spacing-6);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(20px);
    animation: slideInUp 0.6s ease-out forwards;
}

.milestone-card:nth-child(1) { animation-delay: 0.1s; }
.milestone-card:nth-child(2) { animation-delay: 0.2s; }
.milestone-card:nth-child(3) { animation-delay: 0.3s; }
.milestone-card:nth-child(4) { animation-delay: 0.4s; }
.milestone-card:nth-child(5) { animation-delay: 0.5s; }

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

.milestone-card--completed {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-color: var(--color-success);
}

.milestone-card--current {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, #fefbff 0%, #f8faff 100%);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.milestone-card--current::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-success));
}

/* Milestone Header */
.milestone-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.milestone-checkbox-container {
    position: relative;
    flex-shrink: 0;
    margin-top: var(--spacing-1);
}

/* Enhanced Checkbox with Smooth Animation */
.milestone-checkbox {
    appearance: none;
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    background: var(--color-white);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.milestone-checkbox:hover {
    border-color: var(--color-primary);
    transform: scale(1.05);
}

.milestone-checkbox:checked {
    background: var(--color-success);
    border-color: var(--color-success);
    transform: scale(1.1);
}

.milestone-checkbox:checked::after {
    content: '✓';
    color: white;
    font-weight: bold;
    font-size: 14px;
    animation: checkmark 0.3s ease-in-out;
}

@keyframes checkmark {
    0% {
        opacity: 0;
        transform: scale(0.5) rotate(-45deg);
    }
    50% {
        opacity: 1;
        transform: scale(1.2) rotate(0deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotate(0deg);
    }
}

.milestone-content {
    flex: 1;
    min-width: 0;
}

.milestone-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-2);
    line-height: 1.3;
}

.milestone-card--completed .milestone-title {
    color: var(--color-success);
}

.milestone-description {
    color: var(--color-gray-600);
    line-height: 1.6;
    margin-bottom: var(--spacing-4);
}

.milestone-hint {
    background: var(--color-gray-50);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-3) var(--spacing-4);
    margin-bottom: var(--spacing-4);
}

.milestone-hint-label {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-1);
    display: block;
}

.milestone-hint-text {
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
    margin: 0;
    font-style: italic;
}

/* Milestone Meta Information */
.milestone-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.milestone-time {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.milestone-help {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.help-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-primary);
    transition: all var(--transition-fast);
}

.help-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.help-icon {
    width: 16px;
    height: 16px;
}

/* Project Actions */
.project-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    margin-top: var(--spacing-8);
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-gray-200);
    flex-wrap: wrap;
}

.btn--outline {
    background: transparent;
    color: var(--color-gray-600);
    border: 2px solid var(--color-gray-300);
}

.btn--outline:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-800);
    border-color: var(--color-gray-400);
}

/* Completion Celebration */
.completion-celebration {
    text-align: center;
    padding: var(--spacing-8);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-success);
    margin-bottom: var(--spacing-6);
    animation: celebrationPulse 2s ease-in-out infinite;
}

@keyframes celebrationPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}

.celebration-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-4);
    animation: bounce 1s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.celebration-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-success);
    margin-bottom: var(--spacing-2);
}

.celebration-message {
    color: var(--color-gray-700);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-6);
}

/* Responsive Design for Project Dashboard */
@media (max-width: 768px) {
    .progress-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: var(--spacing-3);
    }
    
    .milestone-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-3);
    }
    
    .milestone-checkbox-container {
        align-self: flex-start;
    }
    
    .milestone-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-2);
    }
    
    .project-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .milestones-subtitle {
        font-size: var(--font-size-base);
    }
}

@media (max-width: 480px) {
    .milestone-card {
        padding: var(--spacing-4);
    }
    
    .milestone-title {
        font-size: var(--font-size-lg);
    }
    
    .progress-stats {
        flex-direction: column;
        gap: var(--spacing-1);
    }
    
    .stat-item {
        flex-direction: row;
        gap: var(--spacing-1);
    }
    
    .stat-number {
        font-size: var(--font-size-xl);
    }
}

/* Loading States */
.milestone-card--loading {
    opacity: 0.6;
    pointer-events: none;
}

.milestone-card--loading .milestone-checkbox {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Focus States for Accessibility */
.milestone-checkbox:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.help-link:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .milestone-card {
        border-width: 3px;
    }
    
    .milestone-checkbox {
        border-width: 3px;
    }
    
    .progress-bar {
        border: 2px solid var(--color-gray-800);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .milestone-card,
    .progress-bar__fill,
    .milestone-checkbox,
    .help-link {
        transition: none;
        animation: none;
    }
    
    .progress-bar__shine {
        display: none;
    }
    
    .milestone-card {
        opacity: 1;
        transform: none;
    }
}

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

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

.reset-notification .notification-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.reset-notification .notification-icon {
    font-size: var(--font-size-lg);
}

.reset-notification .notification-text {
    font-weight: 500;
}

/* Enhanced celebration actions */
.celebration-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    margin-top: var(--spacing-6);
}

/* Improved button hover states */
.btn:hover {
    transform: translateY(-2px);
}

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

/* Enhanced focus states for better accessibility */
.milestone-checkbox:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

.help-link:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* Print styles for project dashboard */
@media print {
    .project-actions,
    .help-link,
    .milestone-checkbox {
        display: none;
    }
    
    .milestone-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    .progress-bar__shine {
        display: none;
    }
}

/* Page Transition Styles */
.page-transition {
    opacity: 0;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.page-transition.loaded {
    opacity: 1;
    transform: translateY(0);
}

/* Enhanced Navigation Styles */
.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-6);
    padding: var(--spacing-4) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.nav__link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.nav__link:hover {
    background-color: var(--color-gray-100);
    color: var(--color-primary-hover);
    transform: translateX(-2px);
}

.nav__breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
}

.nav__breadcrumb-separator {
    color: var(--color-gray-400);
}

/* Help Tooltip Styles */
.help-tooltip {
    position: relative;
    display: inline-block;
}

.help-tooltip-content {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 1000;
    margin-bottom: var(--spacing-2);
}

.help-tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--color-gray-900);
}

.help-tooltip:hover .help-tooltip-content {
    opacity: 1;
    visibility: visible;
}

/* Expandable Help Section */
.help-expandable {
    margin-top: var(--spacing-4);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.help-expandable-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--color-gray-50);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.help-expandable-header:hover {
    background: var(--color-gray-100);
}

.help-expandable-title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    margin: 0;
}

.help-expandable-icon {
    transition: transform var(--transition-fast);
    color: var(--color-gray-500);
}

.help-expandable.expanded .help-expandable-icon {
    transform: rotate(180deg);
}

.help-expandable-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal);
}

.help-expandable.expanded .help-expandable-content {
    max-height: 200px;
}

.help-expandable-body {
    padding: var(--spacing-4);
    background: var(--color-white);
}

.help-expandable-description {
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    line-height: 1.5;
    margin-bottom: var(--spacing-3);
}

.help-expandable-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.help-expandable-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.help-expandable-link:hover {
    background: var(--color-gray-50);
    color: var(--color-primary-hover);
}

/* Visual Cues and Feedback */
.visual-cue {
    position: relative;
}

.visual-cue::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--color-primary), var(--color-success));
    border-radius: inherit;
    z-index: -1;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.visual-cue.active::before {
    opacity: 1;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

/* Progress Indicators */
.progress-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-4);
}

.progress-step {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.progress-step--completed {
    background: var(--color-success);
    color: var(--color-white);
}

.progress-step--current {
    background: var(--color-primary);
    color: var(--color-white);
    animation: pulse 2s ease-in-out infinite;
}

.progress-step--pending {
    background: var(--color-gray-200);
    color: var(--color-gray-500);
}

.progress-connector {
    flex: 1;
    height: 2px;
    background: var(--color-gray-200);
    position: relative;
}

.progress-connector--completed {
    background: var(--color-success);
}

/* Loading States */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

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

.loading-spinner-large {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-gray-200);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-4);
}

.loading-text {
    color: var(--color-gray-600);
    font-weight: 500;
}

/* Help Guide Modal */
.help-guide-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.help-guide-modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.help-guide-content {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.help-guide-modal:not(.hidden) .help-guide-content {
    transform: scale(1);
}

.help-guide-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.help-guide-header h3 {
    margin: 0;
    color: var(--color-gray-900);
    font-size: var(--font-size-xl);
}

.help-guide-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--color-gray-500);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.help-guide-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
}

.help-guide-body {
    padding: var(--spacing-6);
}

.help-section {
    margin-bottom: var(--spacing-6);
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h4 {
    color: var(--color-gray-800);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-3);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.help-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.help-section li {
    padding: var(--spacing-2) 0;
    color: var(--color-gray-600);
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
}

.help-section li::before {
    content: '•';
    color: var(--color-primary);
    font-weight: bold;
    flex-shrink: 0;
    margin-top: 2px;
}

kbd {
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    font-size: var(--font-size-xs);
    font-family: monospace;
    color: var(--color-gray-700);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}kbd
 {
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    font-size: var(--font-size-xs);
    font-family: monospace;
    color: var(--color-gray-700);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Enhanced Notification System */
.notification {
    position: fixed;
    top: var(--spacing-4);
    right: var(--spacing-4);
    z-index: 1000;
    max-width: 400px;
    min-width: 300px;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--color-primary);
    transform: translateX(100%);
    opacity: 0;
    transition: all var(--transition-normal);
}

.notification--visible {
    transform: translateX(0);
    opacity: 1;
}

.notification--success {
    border-left-color: var(--color-success);
}

.notification--error {
    border-left-color: var(--color-error);
}

.notification--warning {
    border-left-color: var(--color-warning);
}

.notification-content {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
}

.notification-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-top: 2px;
}

.notification--success .notification-icon {
    color: var(--color-success);
}

.notification--error .notification-icon {
    color: var(--color-error);
}

.notification--warning .notification-icon {
    color: var(--color-warning);
}

.notification-message {
    flex: 1;
    color: var(--color-gray-800);
    font-size: var(--font-size-sm);
    line-height: 1.4;
}

.notification-close {
    background: none;
    border: none;
    color: var(--color-gray-400);
    cursor: pointer;
    font-size: var(--font-size-lg);
    line-height: 1;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.notification-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

/* Loading Overlay Enhancements */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

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

.loading-content {
    text-align: center;
    padding: var(--spacing-8);
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-200);
}

.loading-spinner-large {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-gray-200);
    border-top: 4px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-4);
}

.loading-text {
    color: var(--color-gray-600);
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin: 0;
}

/* Enhanced Error States */
.form-error {
    border-color: var(--color-error) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1) !important;
}

.error-message {
    color: var(--color-error);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-2);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.error-message::before {
    content: '⚠';
    font-weight: bold;
}

/* Offline Indicator */
.offline-indicator {
    position: fixed;
    bottom: var(--spacing-4);
    left: var(--spacing-4);
    background: var(--color-warning);
    color: var(--color-white);
    padding: var(--spacing-2) var(--spacing-4);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    font-weight: 500;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--transition-normal);
}

.offline-indicator.visible {
    transform: translateY(0);
    opacity: 1;
}

/* Performance Optimizations */
.milestone-card,
.question-group,
.card {
    will-change: transform, opacity;
}

.progress-bar__fill {
    will-change: width;
}

.btn {
    will-change: transform;
}

/* Skeleton Loading States */
.skeleton {
    background: linear-gradient(90deg, 
        var(--color-gray-200) 25%, 
        var(--color-gray-100) 50%, 
        var(--color-gray-200) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-2);
}

.skeleton-text--title {
    height: 1.5em;
    width: 60%;
}

.skeleton-text--subtitle {
    height: 1em;
    width: 80%;
}

.skeleton-text--body {
    height: 1em;
    width: 100%;
}

/* Help Guide Modal */
.help-guide-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.help-guide-modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

.help-guide-content {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    transform: scale(0.95);
    transition: transform var(--transition-normal);
}

.help-guide-modal:not(.hidden) .help-guide-content {
    transform: scale(1);
}

.help-guide-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-6);
    border-bottom: 1px solid var(--color-gray-200);
}

.help-guide-header h3 {
    margin: 0;
    color: var(--color-gray-900);
    font-size: var(--font-size-xl);
}

.help-guide-close {
    background: none;
    border: none;
    font-size: var(--font-size-2xl);
    color: var(--color-gray-400);
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.help-guide-close:hover {
    background: var(--color-gray-100);
    color: var(--color-gray-600);
}

.help-guide-body {
    padding: var(--spacing-6);
}

.help-section {
    margin-bottom: var(--spacing-6);
}

.help-section:last-child {
    margin-bottom: 0;
}

.help-section h4 {
    color: var(--color-gray-900);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-3);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.help-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.help-section li {
    padding: var(--spacing-2) 0;
    color: var(--color-gray-700);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
}

.help-section li::before {
    content: '•';
    color: var(--color-primary);
    font-weight: bold;
    margin-top: 2px;
}

kbd {
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    padding: 2px 6px;
    font-family: monospace;
    font-size: var(--font-size-xs);
    color: var(--color-gray-700);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Progress Indicator for Milestones */
.progress-indicator {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2);
    margin: var(--spacing-6) 0;
    padding: var(--spacing-4);
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
}

.progress-step {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-gray-200);
    color: var(--color-gray-500);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.progress-step--completed {
    background: var(--color-success);
    color: var(--color-white);
}

.progress-step--current {
    background: var(--color-primary);
    color: var(--color-white);
    transform: scale(1.1);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
}

.progress-connector {
    width: 24px;
    height: 2px;
    background: var(--color-gray-300);
    transition: background-color var(--transition-fast);
}

.progress-connector--completed {
    background: var(--color-success);
}

/* Mobile Responsive Enhancements */
@media (max-width: 768px) {
    .notification {
        left: var(--spacing-4);
        right: var(--spacing-4);
        max-width: none;
        min-width: auto;
    }
    
    .help-guide-content {
        margin: var(--spacing-4);
        max-height: calc(100vh - 2 * var(--spacing-4));
    }
    
    .progress-indicator {
        flex-wrap: wrap;
        gap: var(--spacing-1);
    }
    
    .progress-step {
        width: 28px;
        height: 28px;
        font-size: var(--font-size-xs);
    }
    
    .progress-connector {
        width: 16px;
    }
}

@media (max-width: 480px) {
    .loading-content {
        margin: var(--spacing-4);
        padding: var(--spacing-6);
    }
    
    .notification-content {
        padding: var(--spacing-3);
    }
    
    .offline-indicator {
        left: var(--spacing-2);
        bottom: var(--spacing-2);
        right: var(--spacing-2);
        text-align: center;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .notification {
        border-width: 2px;
        border-style: solid;
    }
    
    .notification--success {
        border-color: var(--color-success);
    }
    
    .notification--error {
        border-color: var(--color-error);
    }
    
    .notification--warning {
        border-color: var(--color-warning);
    }
}

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    .notification,
    .loading-overlay,
    .help-guide-modal,
    .help-guide-content,
    .skeleton {
        transition: none;
        animation: none;
    }
    
    .loading-spinner-large {
        animation: none;
        border-top-color: var(--color-primary);
    }
    
    .progress-step {
        transition: none;
    }
}/* Criti
cal CSS - Above the fold styles */
/* These styles should be inlined in production for better performance */

/* Critical layout styles */
.container {
    contain: layout style paint;
}

.header {
    contain: layout style;
}

.card {
    contain: layout style paint;
}

/* Performance optimizations */
.milestone-card,
.question-group,
.notification {
    contain: layout style paint;
    will-change: auto;
}

/* GPU acceleration for animations */
.progress-bar__fill,
.loading-spinner,
.loading-spinner-large {
    transform: translateZ(0);
    will-change: transform;
}

/* Optimize repaints */
.btn:hover,
.option-label:hover,
.milestone-card:hover {
    will-change: transform;
}

/* Reset will-change after animations */
.btn:not(:hover),
.option-label:not(:hover),
.milestone-card:not(:hover) {
    will-change: auto;
}

/* Font display optimization */
@font-face {
    font-family: 'System';
    src: local('system-ui'), local('-apple-system'), local('BlinkMacSystemFont');
    font-display: swap;
}

/* Reduce layout shifts */
.loading-spinner,
.loading-spinner-large {
    aspect-ratio: 1;
}

.progress-bar {
    min-height: 16px;
}

/* Optimize for Core Web Vitals */
img {
    max-width: 100%;
    height: auto;
}

.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy.loaded {
    opacity: 1;
}

/* Print optimizations */
@media print {
    * {
        background: transparent !important;
        color: black !important;
        box-shadow: none !important;
        text-shadow: none !important;
    }
    
    .notification,
    .loading-overlay,
    .help-guide-modal,
    .btn,
    .nav__link {
        display: none !important;
    }
    
    .container {
        max-width: none;
        margin: 0;
        padding: 0;
    }
    
    .card {
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
}

/* Dark mode support (future enhancement) */
@media (prefers-color-scheme: dark) {
    :root {
        --color-gray-50: #0f172a;
        --color-gray-100: #1e293b;
        --color-gray-200: #334155;
        --color-gray-800: #f1f5f9;
        --color-gray-900: #f8fafc;
    }
    
    body {
        background-color: var(--color-gray-50);
        color: var(--color-gray-800);
    }
}

/* Accessibility improvements */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus improvements for keyboard navigation */
.btn:focus-visible,
.milestone-checkbox:focus-visible,
.help-link:focus-visible,
.option-label:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* High contrast mode improvements */
@media (prefers-contrast: high) {
    .card,
    .milestone-card,
    .notification {
        border-width: 2px;
    }
    
    .btn {
        border: 2px solid currentColor;
    }
}

/* Optimize for touch devices */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .milestone-checkbox,
    .option-label {
        min-height: 44px;
        min-width: 44px;
    }
    
    .help-link {
        padding: var(--spacing-3) var(--spacing-4);
    }
}

/* Performance monitoring styles */
.perf-monitor {
    position: fixed;
    top: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: var(--spacing-2);
    font-size: var(--font-size-xs);
    font-family: monospace;
    z-index: 10000;
    display: none;
}

.perf-monitor.visible {
    display: block;
}

/* Development helpers */
.debug-grid {
    background-image: 
        linear-gradient(rgba(255, 0, 0, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 0, 0, 0.1) 1px, transparent 1px);
    background-size: 20px 20px;
}

/* End of CSS file */
/* Fix: Ensure question titles are readable in dark-mode when cards remain white */
@media (prefers-color-scheme: dark) {
    .card .card__title,
    .card .question-title {
        color: #0f172a; /* dark text on white card */
    }
}