/* CSS Custom Properties */
:root {
    --primary-color: #6366f1;
    --secondary-color: #f59e0b;
    --accent-color: #ec4899;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-accent: #f3f4f6;
    
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-accent: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    
    --border-radius: 8px;
    --border-radius-lg: 12px;
    --transition: all 0.3s ease;
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-heading: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, rgba(240, 249, 255, 0.9) 0%, rgba(224, 231, 255, 0.9) 50%, rgba(254, 243, 242, 0.9) 100%),
                url('https://images.unsplash.com/photo-1516589178581-6cd7833ae3b2?auto=format&fit=crop&w=1920&q=80&blur=20');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

/* Container */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Language Selector */
.language-selector {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
    backdrop-filter: blur(10px);
}

.lang-btn:hover {
    background: rgba(255, 255, 255, 1);
    border-color: var(--primary-color);
}

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

/* Header */
.header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
}

.logo h1 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 2rem;
    margin: 0;
}

.logo .domain {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-left: 0.5rem;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

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

/* Navigation */
.main-nav {
    background: rgba(255, 255, 255, 0.8);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 73px;
    z-index: 99;
}

.nav-tabs {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 1rem 0;
    flex-wrap: wrap;
}

.tab-btn {
    background: none;
    border: none;
    padding: 0.5rem 1rem;
    font-weight: 500;
    color: #1f2937;
    cursor: pointer;
    transition: var(--transition);
    border-radius: var(--border-radius);
    position: relative;
}

.tab-btn:hover {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.tab-btn.active {
    color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
}



/* Main Content */
.main-content {
    padding: 3rem 0;
    min-height: calc(100vh - 200px);
}

.tab-content {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.content-header {
    text-align: center;
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.content-header h2 {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

/* Form Elements */
.compatibility-form {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.input-group {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 1rem;
    align-items: end;
}

.mbti-select {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: white;
    transition: var(--transition);
}

.mbti-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

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

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

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Result Container */
.result-container {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin: 2rem 0;
}

.result-container.hidden {
    display: none;
}

.compatibility-score {
    text-align: center;
    margin-bottom: 2rem;
}

.score-circle {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
    font-weight: bold;
    color: white;
}

.score-excellent { background: var(--gradient-accent); }
.score-good { background: var(--gradient-primary); }
.score-average { background: var(--gradient-secondary); }

/* MBTI Test Link */
.mbti-test-link {
    text-align: center;
    background: rgba(99, 102, 241, 0.05);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px dashed var(--primary-color);
}

/* Dating Styles Grid */
.dating-styles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.dating-style-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.dating-style-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.dating-style-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Ideal Type Selector */
.ideal-type-selector {
    display: flex;
    justify-content: center;
    margin-bottom: 2rem;
}

.ideal-matches-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.match-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

.match-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.match-percentage {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

/* Rankings */
.rankings-container {
    max-width: 500px;
    margin: 0 auto;
}

.ranking-category {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.ranking-category h3 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.ranking-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.ranking-item {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.ranking-item:hover {
    background: rgba(99, 102, 241, 0.1);
}

.ranking-item .rank {
    background: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 1rem;
}

.ranking-item .pair {
    flex: 1;
    font-weight: 600;
}

.ranking-item .score {
    color: var(--success-color);
    font-weight: bold;
}

/* Conversation Styles */
.conversation-styles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.conversation-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.conversation-card h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Balance Game */
.balance-game-container {
    max-width: 700px;
    margin: 0 auto;
}

.question-container {
    background: white;
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    margin-bottom: 2rem;
}

.question-container h3 {
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.choices {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 2rem;
}

.choice-btn {
    padding: 2rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    background: white;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    line-height: 1.4;
}

.choice-btn:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

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

.game-controls {
    text-align: center;
    margin-bottom: 2rem;
}

.game-result {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
}

/* About Section */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-card i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.mission-statement {
    background: white;
    padding: 3rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    margin-top: 3rem;
}

/* Footer */
.footer {
    background: rgba(255, 255, 255, 0.9);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1rem;
    margin-top: 4rem;
}

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

.footer-links {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.footer-disclaimer {
    max-width: 600px;
    margin: 0 auto 2rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

.footer-copyright {
    font-size: 0.875rem;
    color: var(--text-light);
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 2rem;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
}

.close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-light);
    transition: var(--transition);
}

.close:hover {
    color: var(--text-primary);
}

.legal-content h4 {
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.contact-info {
    margin: 2rem 0;
}

.contact-item {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin: 1rem 0;
    font-weight: 500;
}

.contact-item i {
    color: var(--primary-color);
}

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

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

.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-tabs {
        gap: 1rem;
        padding: 0.75rem 0;
    }
    
    .tab-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }
    
    .input-group {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .choices {
        grid-template-columns: 1fr;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-links {
        flex-direction: column;
        gap: 1rem;
    }
    
    .language-selector {
        position: static;
        justify-content: center;
        padding: 1rem;
        background: rgba(255, 255, 255, 0.9);
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-nav {
        top: 145px;
    }
}

@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .modal-content {
        margin: 10% auto;
        padding: 1.5rem;
    }
    
    .question-container {
        padding: 2rem 1rem;
    }
    
    .compatibility-form {
        padding: 1.5rem;
    }
}

/* Print Styles */
@media print {
    .language-selector,
    .footer,
    .modal {
        display: none !important;
    }
}