:root {
    /* Colors - Interior Catalog Theme */
    --color-primary: #8B7355;
    --color-primary-dark: #6B5642;
    --color-primary-light: #A88F7A;
    --color-secondary: #C9A882;
    --color-accent: #D4AF7A;
    --color-background: #FDFBF7;
    --color-surface: #FFFFFF;
    --color-text-primary: #2C2418;
    --color-text-secondary: #5C5346;
    --color-text-tertiary: #8A7F72;
    --color-border: #E8E3DB;
    --color-border-light: #F2EFE9;
    --color-success: #6B8E23;
    --color-shadow: rgba(44, 36, 24, 0.08);
    --color-shadow-medium: rgba(44, 36, 24, 0.12);
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: Georgia, 'Times New Roman', serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px var(--color-shadow);
    --shadow-md: 0 2px 8px var(--color-shadow);
    --shadow-lg: 0 4px 16px var(--color-shadow-medium);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border-light);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.site-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
}

.logo svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.contact-link:hover {
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-background) 100%);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    text-align: center;
    border-bottom: 1px solid var(--color-border-light);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: clamp(1.75rem, 5vw, 2.75rem);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Quiz Section */
.quiz-section {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
}

.progress-bar-container {
    background-color: var(--color-border-light);
    height: 8px;
    border-radius: 100px;
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    position: relative;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: 100px;
    transition: width var(--transition-slow);
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.3) 50%, transparent 100%);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-text {
    text-align: center;
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.quiz-container {
    max-width: 800px;
    margin: 0 auto;
}

.question-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    animation: fadeIn var(--transition-slow);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.question-number {
    display: inline-block;
    background-color: var(--color-primary-light);
    color: var(--color-surface);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.5px;
}

.question-text {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xl);
    line-height: 1.3;
}

.answers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.answer-card {
    background-color: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    overflow: hidden;
}

.answer-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-secondary) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 0;
}

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

.answer-card.selected {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.answer-card.selected::before {
    opacity: 0.08;
}

.answer-icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-border-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    z-index: 1;
}

.answer-card:hover .answer-icon {
    background-color: var(--color-primary-light);
    color: var(--color-surface);
}

.answer-card.selected .answer-icon {
    background-color: var(--color-primary);
    color: var(--color-surface);
}

.answer-text {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-primary);
    flex: 1;
    z-index: 1;
}

.answer-card.selected .answer-text {
    font-weight: 600;
}

/* Result Form */
.result-form {
    max-width: 600px;
    margin: 0 auto;
    animation: fadeIn var(--transition-slow);
}

.form-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.form-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    animation: scaleIn var(--transition-slow);
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.form-card h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.form-card > p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    font-size: 1.05rem;
}

.contact-form {
    text-align: left;
}

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

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1rem;
    color: var(--color-text-primary);
    background-color: var(--color-surface);
    transition: all var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(139, 115, 85, 0.1);
}

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

.btn-primary {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-surface);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

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

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* Thank You */
.thank-you {
    max-width: 600px;
    margin: 0 auto;
    animation: fadeIn var(--transition-slow);
}

.thank-you-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    text-align: center;
}

.thank-you-icon {
    color: var(--color-success);
    margin-bottom: var(--spacing-lg);
    animation: scaleIn var(--transition-slow);
}

.thank-you-card h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 2rem);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.thank-you-card p {
    color: var(--color-text-secondary);
    font-size: 1.05rem;
    margin-bottom: var(--spacing-md);
}

.thank-you-email {
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1.1rem;
}

/* Info Section */
.info-section {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-2xl) 0;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.info-card {
    text-align: center;
    padding: var(--spacing-lg);
}

.info-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.info-card h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.info-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Footer */
.site-footer {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-column h4 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-md);
}

.footer-column p,
.footer-column a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    line-height: 1.8;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-primary);
}

.footer-address {
    margin-top: var(--spacing-sm);
    line-height: 1.6;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border-light);
}

.footer-bottom p {
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
}

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

/* Responsive */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .logo {
        font-size: 1.1rem;
    }
    
    .logo span {
        display: none;
    }
    
    .contact-link {
        font-size: 0.85rem;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .question-card {
        padding: var(--spacing-lg);
    }
    
    .answers-grid {
        grid-template-columns: 1fr;
    }
    
    .form-card {
        padding: var(--spacing-lg);
    }
    
    .info-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

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

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