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

body {
    font-family: 'Roboto', sans-serif;
    background-color: #121212;
    color: #fff;
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Header Styles */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    border-bottom: 2px solid #37474f;
    margin-bottom: 2rem;
}

.header-left h1 {
    font-size: 2.2rem;
    color: #bb86fc;
}

.header-left h1 i {
    margin-right: 0.5rem;
}

.header-right .back-home-btn {
    background-color: #292929;
    color: #bb86fc;
    padding: 0.75rem 1.25rem;
    text-decoration: none;
    border-radius: 6px;
    font-weight: 500;
    transition: background-color 0.3s ease, color 0.3s ease;
    border: 1px solid #bb86fc;
}

.header-right .back-home-btn:hover {
    background-color: #bb86fc;
    color: #292929;
}

.header-right .back-home-btn i {
    margin-right: 0.3rem;
}

/* Intro Section */
.intro {
    text-align: center;
    margin-bottom: 3rem;
    padding: 1rem;
    background-color: #1e1e1e;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.intro p {
    font-size: 1.1rem;
    color: #e0e0e0;
}

/* Conversion Grid */
.conversion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

/* Converter Cards */
.converter-card {
    background: #1e1e1e;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.converter-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

.card-content {
    position: relative;
    z-index: 2;
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #bb86fc;
    transition: transform 0.3s ease;
}

.converter-card:hover .card-icon {
    transform: scale(1.2);
}

.converter-card h2 {
    color: #e0e0e0;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.converter-card:hover h2 {
    color: #bb86fc;
}

.converter-card p {
    color: #d0d0d0;
    font-size: 1rem;
    line-height: 1.4;
    opacity: 0.8;
}

/* Card Overlays */
.converter-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #4a148c, #880e4f, #bb86fc, #7b1fa2);
    z-index: 1;
    opacity: 0;
    transition: opacity 0.3s ease;
    mix-blend-mode: color-dodge;
    border-radius: 12px;
}

.converter-card:hover::before {
    opacity: 0.4;
}

/* Footer Styles */
.footer {
    text-align: center;
    padding: 1rem 0;
    border-top: 2px solid #37474f;
    margin-top: 4rem;
    color: #777;
}

/* Media Queries for Responsiveness */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        text-align: center;
    }

    .header-left {
        margin-bottom: 1rem;
    }

    .conversion-grid {
        grid-template-columns: 1fr;
    }
}

/* Specific card styles for unique backgrounds */
.length {
    background: linear-gradient(135deg, #3498db, #2980b9);
}

.weight {
    background: linear-gradient(135deg, #2ecc71, #27ae60);
}

.temperature {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
}

.area {
    background: linear-gradient(135deg, #f39c12, #e67e22);
}

.volume {
    background: linear-gradient(135deg, #9b59b6, #8e44ad);
}

.time {
    background: linear-gradient(135deg, #34495e, #2c3e50);
}