:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --bg-dark: #0f172a;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-1: #818cf8;
    --accent-2: #2dd4bf;
    --accent-3: #f472b6;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Background Blobs */
.background-blobs {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    filter: blur(80px);
}

.blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.6;
    animation: move 20s infinite alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-1);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 350px;
    height: 350px;
    background: var(--accent-2);
    bottom: -100px;
    right: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-3);
    top: 40%;
    left: 60%;
    animation-delay: -10s;
}

@keyframes move {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(100px, 50px) scale(1.1); }
}

.container {
    width: 90%;
    max-width: 600px;
    text-align: center;
    z-index: 10;
}

header h1 {
    font-size: 3.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 3rem;
}

.game-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 2rem;
    padding: 3rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    margin-bottom: 2rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

#number-display {
    font-size: 8rem;
    font-weight: 900;
    margin: 2rem 0;
    min-height: 1.2em;
    display: flex;
    justify-content: center;
    align-items: center;
    text-shadow: 0 0 30px rgba(99, 102, 241, 0.5);
    transition: transform 0.1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

#number-display.pop {
    transform: scale(1.2);
}

#status-text {
    font-size: 1.2rem;
    color: var(--accent-2);
    font-weight: 700;
    min-height: 1.5em;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 2rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.label {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
}

.value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
}

.hidden {
    display: none !important;
}

.history-list {
    margin: 2rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.history-item {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 1rem;
    font-size: 0.9rem;
}

.primary-btn {
    background: var(--primary);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 1rem;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.primary-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

footer {
    color: var(--text-muted);
    font-size: 0.8rem;
    opacity: 0.5;
}

/* Animations for Game State */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.wrong-key {
    animation: shake 0.2s ease-in-out 0s 2;
    border-color: rgba(239, 68, 68, 0.5) !important;
}