:root {
    --primary: #2c3e50;
    --secondary: #34495e;
    --accent: #4CAF50;
    --light: #f4f6f8;
    --white: #ffffff;
}

* {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, sans-serif;
}

body {
    margin: 0;
    background: var(--light);
    color: var(--primary);
}

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

header {
    text-align: center;
    margin-bottom: 20px;
}

.tagline {
    font-style: italic;
    opacity: 0.7;
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.player-buttons button,
.btn-primary,
.btn-secondary,
.btn-success {
    padding: 10px 15px;
    margin: 5px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.player-btn,
.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-success {
    background: var(--accent);
    color: white;
}

.decks {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.deck {
    background: var(--white);
    padding: 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: 0.2s;
    text-align: center;
}

.deck:hover {
    transform: scale(1.03);
}

.card-display {
    margin-top: 20px;
}

.hidden {
    display: none;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 10px;
}

textarea {
    width: 100%;
    height: 80px;
    margin-top: 10px;
}