:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --success: #10b981;
    --danger: #ef4444;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; touch-action: manipulation; user-select: none; }

.new-game-wrapper {
    background-color: var(--bg-color); color: var(--text-main);
    display: flex; justify-content: center; align-items: center;
    min-height: 100vh; overflow: hidden;
}

#game-container {
    width: 100%; max-width: 500px; background-color: var(--card-bg);
    border-radius: 16px; padding: 16px; box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.5);
    position: relative;
    min-height: 600px;
    display: flex; flex-direction: column;
}

.screen { display: none; flex-direction: column; align-items: center; text-align: center; animation: fadeIn 0.3s; flex: 1; justify-content: center; }
.screen.active { display: flex; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

.game-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 16px; color: #93c5fd; }
.instructions { color: var(--text-muted); margin-bottom: 32px; line-height: 1.6; padding: 0 20px; font-size: 1.1rem; }
.final-score { font-size: 1.8rem; font-weight: 700; color: #93c5fd; margin-bottom: 16px; }
.rank-title { font-size: 1.5rem; font-weight: bold; color: #fcd34d; margin-bottom: 24px; }

.btn {
    border: none; padding: 12px 24px; border-radius: 8px; font-size: 1.1rem; font-weight: 700;
    color: white; cursor: pointer; transition: all 0.2s; width: 100%; max-width: 250px;
}
.btn:active { transform: scale(0.95); }
.btn.primary { background-color: var(--primary); }
.btn.primary:hover { background-color: var(--primary-hover); }

.header { display: flex; justify-content: space-between; width: 100%; margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid #334155; font-weight: 700; font-size: 1.1rem; color: #93c5fd; }

.game-area { width: 100%; flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; position: relative;}

.view { width: 100%; display: flex; flex-direction: column; align-items: center; }
.view.hidden { display: none; }

#display-number {
    font-size: 4rem; font-weight: 900; letter-spacing: 5px; color: #fff; margin-bottom: 30px;
    text-shadow: 0 0 20px rgba(255,255,255,0.5);
}

.progress-bar-container {
    width: 80%; height: 8px; background: #334155; border-radius: 4px; overflow: hidden;
}
#timer-bar {
    height: 100%; width: 100%; background: #3b82f6;
    transition: width 0.1s linear;
}

#input-display {
    width: 80%; height: 60px; background: #0f172a; border: 2px solid #334155; border-radius: 8px;
    font-size: 2.5rem; font-weight: bold; color: #10b981; display: flex; justify-content: center; align-items: center;
    margin-bottom: 20px; letter-spacing: 2px;
}

.numpad {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; width: 80%; max-width: 300px;
}
.num-btn {
    background: #334155; color: #fff; border: none; border-radius: 8px;
    height: 60px; font-size: 1.5rem; font-weight: bold; cursor: pointer; transition: background 0.1s;
}
.num-btn:active { background: #475569; }
.num-btn.action { font-size: 1.2rem; }
.num-btn.danger { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
.num-btn.success { background: var(--success); color: #000; }

.msg-overlay {
    position: absolute; top: 30%; left: 0; width: 100%; text-align: center;
    font-size: 3rem; font-weight: 900; color: #10b981; text-shadow: 0 0 15px #000;
    z-index: 50; animation: popIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.msg-overlay.hidden { display: none; }
@keyframes popIn { 0% { transform: scale(0); } 100% { transform: scale(1); } }