:root {
    --primary: #00d1b2;
    --dark: #2c3e50;
    --light: #ffffff;
    --bg: #f5f7fa;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg);
    margin: 0;
    color: var(--dark);
}

header {
    background: white;
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo { font-size: 1.5rem; font-weight: 800; color: var(--primary); cursor: pointer; }

.container { max-width: 1000px; margin: 40px auto; padding: 0 20px; }

.view { transition: opacity 0.3s ease; }
.hidden { display: none; }

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    cursor: pointer;
    transition: 0.3s;
    border: 1px solid #eee;
}

.card:hover { transform: translateY(-5px); border-color: var(--primary); }

.icon { font-size: 3rem; margin-bottom: 15px; }

.drop-zone {
    border: 2px dashed #cbd5e1;
    padding: 50px;
    border-radius: 15px;
    background: white;
    cursor: pointer;
    margin: 20px 0;
}

.tool-settings {
    background: white;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

input[type="number"], input[type="text"] {
    padding: 10px;
    width: 100%;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 5px;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 25px;
    border-radius: 8px;
    font-weight: bold;
    cursor: pointer;
}

.back-btn { background: #666; margin-bottom: 20px; }