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

body {
    font-family: 'Noto Serif SC', serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

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

.header {
    text-align: center;
    padding: 40px 20px;
    color: white;
}

.header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 20px;
}

.stats {
    display: flex;
    justify-content: center;
    gap: 30px;
    font-size: 1.1rem;
}

.stats strong {
    font-size: 1.5rem;
    color: #ffd700;
}

.seasons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.season {
    background: rgba(255, 255, 255, 0.95);
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.season:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 50px rgba(0, 0, 0, 0.2);
}

.season-title {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 3px solid;
    text-align: center;
}

.spring .season-title { color: #4CAF50; border-color: #4CAF50; }
.summer .season-title { color: #FF9800; border-color: #FF9800; }
.autumn .season-title { color: #F44336; border-color: #F44336; }
.winter .season-title { color: #2196F3; border-color: #2196F3; }

.solar-terms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.term-card {
    background: linear-gradient(145deg, #f5f5f5, #e0e0e0);
    border-radius: 15px;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.term-card:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.term-card.collected {
    background: linear-gradient(145deg, #fff8e1, #ffecb3);
}

.term-card.collected::before {
    content: '🏅';
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 18px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.term-name {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 5px;
}

.term-date {
    font-size: 0.85rem;
    color: #666;
}

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

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 30px;
    border-radius: 20px;
    width: 90%;
    max-width: 450px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    position: relative;
    animation: modalIn 0.3s ease;
}

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

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #333;
}

.modal-content h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #333;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: none;
}

.submit-btn, .delete-btn {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.submit-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

.delete-btn {
    background: linear-gradient(135deg, #f44336 0%, #d32f2f 100%);
    color: white;
}

.delete-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(244, 67, 54, 0.4);
}

#recordDetails {
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 10px;
}

#recordDetails p {
    margin-bottom: 10px;
    font-size: 1rem;
    color: #333;
}

#recordDetails p:last-child {
    margin-bottom: 0;
}

#recordDetails strong {
    color: #667eea;
}

@media (max-width: 768px) {
    .header h1 {
        font-size: 2rem;
    }
    
    .stats {
        flex-direction: column;
        gap: 10px;
    }
    
    .seasons {
        grid-template-columns: 1fr;
    }
    
    .solar-terms-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .modal-content {
        margin: 20% auto;
        width: 95%;
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .solar-terms-grid {
        grid-template-columns: 1fr;
    }
}