:root { --bg-color: #f4f4f9; --card-bg: #ffffff; --primary: #4f46e5; --text: #1f2937; --border: #e5e7eb; --error: #ef4444; }
* { box-sizing: border-box; margin: 0; padding: 0; font-family: sans-serif; }
body { background-color: var(--bg-color); color: var(--text); display: flex; justify-content: center; min-height: 100vh; padding: 20px; }
.container { width: 100%; max-width: 600px; text-align: center; }
h1 { margin-bottom: 20px; color: var(--primary); font-size: 2.5rem; }
.card { background: var(--card-bg); padding: 30px; border-radius: 12px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); }
.screen { display: none; }
.screen.active { display: block; }
input { width: 100%; padding: 12px; margin-bottom: 15px; border: 1px solid var(--border); border-radius: 8px; font-size: 1rem; text-align: center; }
button { width: 100%; padding: 12px; border: none; border-radius: 8px; font-size: 1rem; font-weight: bold; cursor: pointer; background: #e5e7eb; }
button.primary { background: var(--primary); color: white; }
button:disabled { background: #9ca3af; cursor: not-allowed; }
hr { border: 0; border-top: 1px solid var(--border); margin: 20px 0; }
.error { color: white; background: var(--error); padding: 10px; border-radius: 8px; margin-bottom: 15px; }
.hidden { display: none !important; }
.highlight { color: var(--primary); font-weight: bold; font-size: 1.5rem; }
.player-list, .concept-list { list-style: none; margin-bottom: 20px; text-align: left; }
.player-list li, .concept-item { padding: 12px; background: var(--bg-color); margin-bottom: 8px; border-radius: 8px; border: 1px solid var(--border); }
.concept-item { display: flex; justify-content: space-between; align-items: center; font-weight: 500;}
.controls button { width: auto; padding: 5px 15px; margin-left: 5px; }
.table-container { overflow-x: auto; margin-top: 20px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px; border: 1px solid var(--border); text-align: center; }
th { background: var(--primary); color: white; }