:root {
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #212529;
    --border-color: #dee2e6;
    --muted-text: #6c757d;
    --hover-bg: #e9ecef;
    --primary-color: #0d6efd;
    --success-color: #198754;
    --danger-color: #dc3545;
}

[data-theme="dark"] {
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --text-color: #ffffff;
    --border-color: #404040;
    --muted-text: #aaaaaa;
    --hover-bg: #333333;
    --primary-color: #6ea8fe;
    --success-color: #75b798;
    --danger-color: #ea868f;
}

body {
    background: linear-gradient(135deg, var(--bg-color) 0%, var(--hover-bg) 100%);
    color: var(--text-color);
    transition: all 0.3s ease;
    min-height: 100vh;
}

.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--success-color) 100%);
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 15px;
    transition: all 0.3s ease;
    height: 100%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.tool-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.btn-launch {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--success-color) 100%);
    border: none;
    color: white;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-launch:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    color: white;
}

.feature-list {
    list-style: none;
    padding-left: 0;
}

.feature-list li {
    padding: 0.25rem 0;
    color: var(--muted-text);
}

.feature-list li:before {
    content: "✓";
    color: var(--success-color);
    font-weight: bold;
    margin-right: 0.5rem;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.theme-toggle:hover {
    background: var(--hover-bg);
    transform: rotate(180deg);
}

.stats-section {
    background: var(--card-bg);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    border: 1px solid var(--border-color);
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
}

.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 4rem;
}

.step-circle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes ripple {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.ripple-effect {
    position: absolute;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.6);
    transform: scale(0);
    animation: ripple 0.6s linear;
    pointer-events: none;
}

.card-loading {
    opacity: 0;
    transform: translateY(20px);
}

.card-loaded {
    opacity: 1;
    transform: translateY(0);
    transition: all 0.6s ease;
}

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .tool-icon {
        font-size: 3rem;
    }
}