:root {
    --bg-color: #f0f3f5;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --accent-color: #e67e22;
    --shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    --border-radius: 12px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
}

header {
    padding: 3rem 1rem;
    text-align: center;
    background: var(--card-bg);
    box-shadow: var(--shadow);
}

.search-container {
    margin-top: 1.5rem;
    position: relative;
    max-width: 450px;
    margin-left: auto;
    margin-right: auto;
}

.search-container input {
    width: 100%;
    padding: 14px 45px;
    border: 2px solid #ecf0f1;
    border-radius: 30px;
    outline: none;
    transition: border-color 0.3s ease;
}

.search-container input:focus {
    border-color: var(--accent-color);
}

.search-container i {
    position: absolute;
    left: 18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--accent-color);
}

.grid-container {
    display: grid;
    padding: 2.5rem;
    gap: 2rem;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.butterfly-card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
}

.butterfly-card:hover {
    transform: scale(1.03);
}

.butterfly-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.card-content {
    padding: 1.2rem;
}

.card-content h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--accent-color);
}

.loader {
    width: 45px;
    height: 45px;
    border: 4px solid #dcdde1;
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    margin: 80px auto;
    display: none;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-msg {
    text-align: center;
    color: #c0392b;
    grid-column: 1 / -1;
    padding: 15px;
    background: #fadbd8;
    border-radius: var(--border-radius);
}