* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    max-width: 1200px;
    width: 90%;
    margin: 2rem auto;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease-in;
}

h1 {
    color: white;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.search-container {
    position: relative;
    width: 300px;
}

.search-container input {
    width: 100%;
    padding: 0.8rem 1rem;
    padding-right: 2.5rem;
    border: none;
    border-radius: 25px;
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
}

.search-container input:focus {
    outline: none;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.search-container i {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #764ba2;
}

.add-bookmark {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    animation: slideDown 0.5s ease-out;
}

.add-bookmark input {
    flex: 1;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.add-bookmark input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 5px rgba(102, 126, 234, 0.3);
}

.add-bookmark button {
    padding: 0.8rem 1.5rem;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-bookmark button:hover {
    background: #764ba2;
    transform: translateY(-2px);
}

.bookmarks-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.bookmark-item {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    animation: fadeIn 0.5s ease-in;
}

.bookmark-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.bookmark-item h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

.bookmark-item a {
    color: #667eea;
    text-decoration: none;
    display: block;
    margin-bottom: 1rem;
    word-break: break-all;
}

.bookmark-item .actions {
    display: flex;
    gap: 1rem;
}

.bookmark-item button {
    padding: 0.5rem;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.bookmark-item .delete-btn {
    background: #ff4757;
    color: white;
}

.bookmark-item .visit-btn {
    background: #2ed573;
    color: white;
}

.bookmark-item button:hover {
    opacity: 0.9;
    transform: scale(1.05);
}

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

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

@media (max-width: 768px) {
    .container {
        width: 95%;
        margin: 1rem auto;
        padding: 1rem;
    }

    header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .search-container {
        width: 100%;
    }

    .add-bookmark {
        flex-direction: column;
    }

    .bookmarks-container {
        grid-template-columns: 1fr;
    }
}