/* Global Style Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.logo {
    font-size: 2.5rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.tagline {
    font-size: 1.2rem;
    color: #666;
    font-weight: 300;
}

/* Main Content Area */
.main {
    padding: 3rem 0;
}

/* Calculator Area */
.calculator-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.calculator-section h2 {
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
}

/* Form Styles */
.calculator-form {
    max-width: 500px;
    margin: 0 auto 2rem;
}

.input-group {
    margin-bottom: 1.5rem;
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper input {
    width: 100%;
    padding: 1rem 3rem 1rem 1rem;
    border: 2px solid #e1e5e9;
    border-radius: 12px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    background: #fff;
}

.input-wrapper input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.currency, .odds-format {
    position: absolute;
    right: 1rem;
    color: #666;
    font-weight: 600;
    pointer-events: none;
}

.calculate-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
    margin-top: 1rem;
}

.calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

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

/* Results Area */
.results {
    background: #f8f9fa;
    border-radius: 15px;
    padding: 2rem;
    margin-top: 2rem;
    border-left: 5px solid #667eea;
}

.results h3 {
    color: #333;
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.result-item {
    background: white;
    padding: 1rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.result-label {
    font-weight: 600;
    color: #666;
}

.result-value {
    font-weight: 700;
    color: #667eea;
    font-size: 1.1rem;
}

/* Features Area */
.features-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.features-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Information Section */
.info-section {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.info-section h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #333;
    margin-bottom: 2rem;
}

.info-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.info-item {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
}

.info-item h3 {
    color: #333;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.info-item p {
    color: #666;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.info-item strong {
    color: #667eea;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer p {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .calculator-section,
    .features-section,
    .info-section {
        padding: 2rem 1.5rem;
    }
    
    .logo {
        font-size: 2rem;
    }
    
    .calculator-section h2,
    .features-section h2,
    .info-section h2 {
        font-size: 2rem;
    }
    
    .result-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .info-content {
        grid-template-columns: 1fr;
    }
    
    .input-wrapper input {
        font-size: 1rem;
        padding: 0.8rem 2.5rem 0.8rem 0.8rem;
    }
}

@media (max-width: 480px) {
    .calculator-section,
    .features-section,
    .info-section {
        padding: 1.5rem 1rem;
    }
    
    .logo {
        font-size: 1.8rem;
    }
    
    .tagline {
        font-size: 1rem;
    }
}

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

.calculator-section,
.features-section,
.info-section {
    animation: fadeInUp 0.6s ease-out;
}

.feature-card {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

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

/* Loading State */
.calculate-btn.loading {
    background: #ccc;
    cursor: not-allowed;
}

.calculate-btn.loading::after {
    content: "计算中...";
}

/* Error State */
.input-wrapper input.error {
    border-color: #e74c3c;
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.error-message {
    color: #e74c3c;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    text-align: left;
}