/* Unicorn Level Architecture - Professional Design System */

/* CSS Custom Properties */
:root {
    --color-primary: #1a1a1a;
    --color-secondary: #d4a017;
    --color-accent: #fffacd;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-white: #ffffff;
    --color-gray-50: #fafafa;
    --color-gray-100: #f5f5f5;
    --color-gray-200: #eeeeee;
    --color-gray-300: #e0e0e0;
    --color-gray-400: #bdbdbd;
    --color-gray-500: #9e9e9e;
    
    --font-primary: 'Playfair Display', serif;
    --font-secondary: 'Inter', sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.25);
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-secondary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: linear-gradient(135deg, #fffacd 0%, #ffffff 100%);
    min-height: 100vh;
    overflow-x: hidden;
}

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

.app-header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    padding: 2rem 0;
    box-shadow: var(--shadow-lg);
    position: relative;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.main-title {
    font-family: var(--font-primary);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--color-text-light);
    font-weight: 300;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.5;
}

.app-main {
    flex: 1;
    padding: 3rem 0;
}

/* Page Architecture */
.page {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: none;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* Selection Page Styles */
.selection-container {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-2xl);
    padding: 3rem;
    box-shadow: var(--shadow-2xl);
    backdrop-filter: blur(20px);
}

.page-header {
    text-align: center;
    margin-bottom: 3rem;
}

.page-header h2 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.instruction-text {
    font-size: 1.125rem;
    color: var(--color-text-light);
    font-weight: 300;
}

/* Toppings Grid Architecture */
.toppings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.topping-card {
    perspective: 1000px;
}

.card-inner {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.topping-card:hover .card-inner {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.topping-card.selected .card-inner {
    background: linear-gradient(145deg, #ffebee, #ffcdd2);
    border: 2px solid var(--color-secondary);
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.topping-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    margin-right: 1rem;
    position: relative;
    overflow: hidden;
}

.topping-icon.pepperoni {
    background: radial-gradient(circle, #d32f2f, #b71c1c);
}

.topping-icon.cheese {
    background: radial-gradient(circle, #ffc107, #f57c00);
}

.topping-icon.pineapple {
    background: radial-gradient(circle, #ffeb3b, #ff9800);
}

.topping-icon.veggie {
    background: radial-gradient(circle, #4caf50, #2e7d32);
}

.topping-icon.anchovies {
    background: radial-gradient(circle, #546e7a, #37474f);
}

.topping-icon.supreme {
    background: radial-gradient(circle, #9c27b0, #6a1b9a);
}

.topping-icon::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 30px;
    height: 30px;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
}

.card-header h3 {
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

.card-body p {
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

/* Custom Checkbox Architecture */
.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.checkbox-container input[type="checkbox"] {
    display: none;
}

.checkbox-custom {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-gray-400);
    border-radius: var(--radius-sm);
    margin-right: 0.75rem;
    position: relative;
    transition: all var(--transition-fast);
    background: var(--color-white);
}

.checkbox-container input[type="checkbox"]:checked + .checkbox-custom {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
}

.checkbox-custom::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 6px;
    width: 6px;
    height: 12px;
    border: solid var(--color-white);
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.checkbox-container input[type="checkbox"]:checked + .checkbox-custom::after {
    opacity: 1;
}

.checkbox-label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
}

/* Button Architecture */
.action-container {
    text-align: center;
}

.primary-action {
    background: linear-gradient(45deg, var(--color-primary), #2c2c2c);
    color: var(--color-white);
    border: none;
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.primary-action:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(45deg, #2c2c2c, var(--color-primary));
}

.primary-action:disabled,
.primary-action.disabled {
    background: var(--color-gray-400);
    cursor: not-allowed;
    transform: none;
    opacity: 0.6;
}

/* Loading Page Styles */
.loading-container {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-2xl);
    padding: 4rem 3rem;
    text-align: center;
    box-shadow: var(--shadow-2xl);
}

.loading-header h2 {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.loading-header p {
    font-size: 1.125rem;
    color: var(--color-text-light);
    margin-bottom: 3rem;
}

.progress-section {
    max-width: 600px;
    margin: 0 auto;
}

.progress-bar-container {
    margin-bottom: 3rem;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--color-gray-200);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-secondary), #f4c430);
    width: 0%;
    transition: width 0.3s ease;
    position: relative;
}

.progress-percentage {
    text-align: center;
    margin-top: 1rem;
    font-family: var(--font-primary);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.analysis-steps {
    text-align: left;
}

.analysis-step {
    padding: 1rem 1.5rem;
    margin: 0.75rem 0;
    border-radius: var(--radius-md);
    background: var(--color-gray-50);
    border-left: 4px solid transparent;
    opacity: 0.3;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.analysis-step.active {
    opacity: 1;
    background: linear-gradient(145deg, #ffebee, #fff3f3);
    border-left-color: var(--color-secondary);
    color: var(--color-primary);
    font-weight: 500;
    transform: translateX(4px);
}

/* Result Page Styles */
.result-container {
    background: rgba(255, 255, 255, 0.98);
    border-radius: var(--radius-2xl);
    padding: 4rem 3rem;
    text-align: center;
    box-shadow: var(--shadow-2xl);
}

.result-header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 2px solid var(--color-gray-100);
}

.result-header h2 {
    font-family: var(--font-primary);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.result-header h3 {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-secondary);
    font-style: italic;
}

.result-content {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.result-analysis {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-text);
    margin-bottom: 2rem;
    text-align: left;
    padding: 2rem;
    background: var(--color-gray-50);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-secondary);
}

.result-profile h4 {
    font-family: var(--font-primary);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.profile-toppings {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.topping-badge {
    background: linear-gradient(45deg, var(--color-primary), #2c2c2c);
    color: var(--color-white);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: var(--shadow-md);
}

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

.secondary-action {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
    padding: 1rem 2.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.secondary-action:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Responsive Architecture */
@media (max-width: 768px) {
    .main-title {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1.125rem;
    }
    
    .selection-container,
    .loading-container,
    .result-container {
        padding: 2rem 1.5rem;
    }
    
    .toppings-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .page-header h2 {
        font-size: 2rem;
    }
    
    .result-header h2 {
        font-size: 2.25rem;
    }
    
    .result-analysis {
        padding: 1.5rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 1.5rem 0;
    }
    
    .header-content {
        padding: 0 1rem;
    }
    
    .main-title {
        font-size: 2rem;
    }
    
    .page {
        padding: 0 1rem;
    }
    
    .selection-container,
    .loading-container,
    .result-container {
        padding: 1.5rem 1rem;
    }
}

/* Animation Utilities */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Focus States for Accessibility */
.primary-action:focus,
.secondary-action:focus,
.checkbox-container:focus-within {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}