/* Reset dan Base Styles */
* {
    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, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

/* Header Styles */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    background: rgba(0, 0, 0, 0.2);
    padding: 0.5rem 0;
    font-size: 0.9rem;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.contact-info {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-info span {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.header-main {
    padding: 1rem 0;
}

.header-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo p {
    font-size: 0.9rem;
    opacity: 0.9;
    margin-top: 0.25rem;
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

nav a:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.85), rgba(118, 75, 162, 0.85)),
                url('../img/blue-books.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: white;
    padding: 5rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: 100px 100px;
    animation: float 20s linear infinite;
}

@keyframes float {
    0% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInDown 1s ease;
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 1s ease;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    background: white;
    color: #667eea;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    animation: fadeIn 1s ease 0.5s both;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* Search Form Styles */
.search-container {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    animation: fadeIn 1s ease 0.5s both;
    padding: 0 1rem;
}

.search-form {
    display: flex;
    align-items: center;
    background: white;
    border-radius: 60px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    max-width: 900px;
    width: 100%;
    border: 1px solid #e0e0e0;
}

.search-select {
    padding: 1.2rem 1.5rem;
    border: none;
    background: white;
    color: #333;
    font-weight: 400;
    font-size: 0.95rem;
    cursor: pointer;
    outline: none;
    border-right: 1px solid #e0e0e0;
    min-width: 150px;
}

.search-select:focus {
    background: #fafafa;
}

.search-input {
    flex: 1;
    padding: 1.2rem 1.5rem;
    border: none;
    font-size: 0.95rem;
    outline: none;
    color: #333;
    font-style: italic;
}

.search-input::placeholder {
    color: #999;
    font-style: italic;
}

.search-btn {
    padding: 0.5rem;
    margin: 0.5rem;
    border: none;
    background: #0d6d8f;
    color: white;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    flex-shrink: 0;
}

.search-btn:hover {
    background: #0a5570;
    transform: scale(1.05);
}

.search-btn svg {
    display: block;
}

/* Animations */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* About Section */
.about {
    padding: 4rem 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #667eea;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 3rem;
}

.about-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.about-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

.about-card h3 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

/* Books Section */
.books {
    padding: 4rem 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.book-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    cursor: pointer;
}

.book-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.book-image {
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
    overflow: hidden;
    position: relative;
}

.book-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.book-image .no-cover {
    font-size: 4rem;
}

.book-content {
    padding: 1.5rem;
}

.book-content h3 {
    color: #667eea;
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.book-author {
    color: #666;
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.book-category {
    display: inline-block;
    background: #667eea;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
}

.book-price {
    font-size: 1.5rem;
    color: #764ba2;
    font-weight: bold;
    margin-top: 1rem;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info-box {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.contact-info-box h3 {
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
}

.info-item {
    display: flex;
    align-items: start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.info-item .icon {
    font-size: 1.5rem;
    margin-top: 0.2rem;
}

.contact-form {
    background: #f5f7fa;
    padding: 2rem;
    border-radius: 15px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-submit:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

/* Footer */
footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

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

.footer-section h3 {
    margin-bottom: 1rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: white;
    text-decoration: none;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.footer-section a:hover {
    opacity: 1;
}

.footer-bottom {
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* Search Header Section */
.search-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
    margin-top: 0;
}

.search-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.search-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.search-info {
    margin-bottom: 2rem;
}

/* Search Results Section */
.search-results {
    padding: 4rem 0 2rem 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 50vh;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.6);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 20px;
    width: 90%;
    max-width: 700px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.3);
    animation: slideDown 0.4s ease;
    position: relative;
}

@keyframes slideDown {
    from {
        transform: translateY(-100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    color: #aaa;
    font-size: 35px;
    font-weight: bold;
    cursor: pointer;
    z-index: 1;
    transition: color 0.3s ease;
}

.close:hover,
.close:focus {
    color: #667eea;
}

#modalBody {
    padding: 2rem;
}

.loading {
    text-align: center;
    padding: 2rem;
    color: #667eea;
    font-size: 1.2rem;
}

.book-detail {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.book-detail-icon {
    font-size: 5rem;
    text-align: center;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 15px;
    margin: 0 auto;
    width: fit-content;
}

.book-detail h2 {
    color: #667eea;
    text-align: center;
    font-size: 2rem;
    margin: 0;
}

.book-detail-info {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.book-detail-info p {
    margin: 0.5rem 0;
    color: #333;
    font-size: 0.95rem;
}

.book-detail-info strong {
    color: #667eea;
    display: block;
    margin-bottom: 0.25rem;
}

.book-detail-desc {
    background: white;
    padding: 1.5rem;
    border: 2px solid #f1f3f5;
    border-radius: 10px;
}

.book-detail-desc h3 {
    color: #667eea;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.book-detail-desc p {
    color: #555;
    line-height: 1.8;
    text-align: justify;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-main .container {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    nav ul {
        flex-direction: column;
        gap: 0.5rem;
    }

    .hero h2 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .contact-info {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .search-form {
        flex-direction: column;
        border-radius: 20px;
    }
    
    .search-select {
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        min-width: auto;
    }
    
    .search-btn {
        align-self: center;
        margin: 0.5rem;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
    
    .book-detail-icon {
        font-size: 3rem;
    }
    
    .book-detail h2 {
        font-size: 1.5rem;
    }
    
    .book-detail-info {
        grid-template-columns: 1fr;
    }
    
    #modalBody {
        padding: 1.5rem;
    }
}

/* Scroll Animation */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}