:root {
    --bg: #f4f6f8;
    --text: #1f2937;
    --card: #ffffff;
    --primary: #2563eb;
}

body.dark {
    --bg: #0f172a;
    --text: #e5e7eb;
    --card: #1e293b;
    --primary: #38bdf8;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Inter, Arial, sans-serif;
    margin: 0;
    padding: 20px;
    transition: 0.3s;
}

.container {
    max-width: 900px;
    margin: auto;
    background: var(--card);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 16px;
    border-radius: 8px;
    cursor: pointer;
}

.row {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.hidden {
    display: none;
}

.pill-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.pill {
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--primary);
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: 0.2s;
}

.pill:hover {
    background: var(--primary);
    color: white;
}

.pill.active {
    background: var(--primary);
    color: white;
}

.generate {
    margin-top: 10px;
    font-size: 15px;
}