:root {
    --primary: #3B82F6;
    --secondary: #10B981;
    --accent: #F59E0B;
    --dark: #1F2937;
    --light: #F3F4F6;
    --border: #E5E7EB;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background-color: #ffffff;
    scroll-behavior: smooth;
}

header {
    background: #3B82F6;
    color: white;
    padding: 1rem;
    text-align: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo h1 {
    margin: 0;
    padding: 0;
    color: inherit;
    font-size: inherit;
    font-weight: inherit;
}

.nav-links {
    margin-top: 10px;
    font-size: 0.9rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    margin: 0 10px;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

h1 {
    font-size: 2.5rem;
    color: white;
    margin-bottom: 1rem;
    text-align: center;
}

header h1 {
    color: white;
}

h2 {
    font-size: 1.8rem;
    color: var(--dark);
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border);
}

h3 {
    font-size: 1.4rem;
    color: var(--dark);
    margin: 1.5rem 0 0.8rem;
}

h4 {
    font-size: 1.2rem;
    color: var(--dark);
    margin: 1.2rem 0 0.6rem;
}

/* Year Selector Styles */
#yearSelectorSection {
    background: linear-gradient(135deg, #f0fdf4 0%, #eff6ff 100%);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.year-selector-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--dark);
}

.year-selector {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.year-selector select {
    padding: 12px 24px;
    font-size: 1rem;
    border: 2px solid var(--border);
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: border-color 0.3s;
}

.year-selector select:focus {
    outline: none;
    border-color: var(--primary);
}

/* Zodiac Result Styles */
.zodiac-result {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    display: none;
}

.zodiac-result.show {
    display: block;
}

#zodiacEmoji {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

#zodiacTitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

#zodiacDesc {
    color: #6B7280;
    line-height: 1.6;
}

/* Two-column grid */
.zodiac-grid-2col {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .zodiac-grid-2col {
        grid-template-columns: 1fr;
    }
}

.zodiac-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    border-top: 4px solid var(--primary);
    transition: transform 0.3s, box-shadow 0.3s;
}

.zodiac-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}

.zodiac-emoji {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

/* Compatibility result section */
.compatibility-result {
    margin-top: 2rem;
    padding: 2rem;
    background: linear-gradient(135deg, #f0fdf4 0%, #eff6ff 100%);
    border-radius: 12px;
    display: none;
}

.compatibility-result.show {
    display: block;
}

.compatibility-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.compatibility-card {
    background: white;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.compatibility-card.best {
    border-top: 4px solid #10B981;
}

.compatibility-card.worst {
    border-top: 4px solid #EF4444;
}

.compatibility-emoji {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.compatibility-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

/* How to Determine Section */
.how-to-card {
    background: linear-gradient(135deg, #FEF3C7 0%, #FDE68A 100%);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 2rem;
}

.how-to-card h3 {
    color: #92400E;
    margin-top: 0;
}

.how-to-card ol {
    margin-left: 1.5rem;
    color: #78350F;
}

.how-to-card li {
    margin-bottom: 0.8rem;
    line-height: 1.6;
}

/* Scroll Button */
.scroll-btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background 0.3s;
    cursor: pointer;
}

.scroll-btn:hover {
    background: #2563EB;
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 2rem;
}

footer a {
    color: #9CA3AF;
    text-decoration: none;
    margin: 0 10px;
}

footer a:hover {
    color: white;
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    #yearSelectorSection {
        padding: 1.5rem;
    }
    
    .year-selector {
        flex-direction: column;
        align-items: stretch;
    }
    
    .compatibility-grid {
        grid-template-columns: 1fr;
    }
}