:root {
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --primary: #8b5cf6;
    --primary-hover: #7c3aed;
    --primary-glow: rgba(139, 92, 246, 0.5);
    --secondary: #ec4899;
    --secondary-hover: #db2777;
    --secondary-glow: rgba(236, 72, 153, 0.5);
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --danger: #ef4444;
    --success: #10b981;
}

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

body {
    background-color: var(--bg-darker);
    color: var(--text-main);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    height: 100dvh;
    min-height: -webkit-fill-available;
    overflow: hidden;
    position: fixed;
    width: 100vw;
    padding: 20px;
    touch-action: none;
    overscroll-behavior: none;
}

/* Dynamic Animated Background */
.glass-background {
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, var(--primary-glow) 0%, transparent 40%),
                radial-gradient(circle at 80% 20%, var(--secondary-glow) 0%, transparent 30%);
    z-index: -1;
    animation: rotate 30s linear infinite;
    opacity: 0.6;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* App Container */
.app-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    width: 100%;
    max-width: 480px;
    padding: 40px 30px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

header h1 {
    font-weight: 800;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 30px;
    letter-spacing: -1px;
}

header h1 span {
    color: transparent;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
}

/* Screens */
.screen {
    display: none;
    animation: fadeIn 0.4s ease forwards;
}

.screen.active {
    display: block;
}

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

h2 {
    font-size: 1.75rem;
    text-align: center;
    margin-bottom: 10px;
    font-weight: 600;
}

p {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 25px;
    line-height: 1.5;
}

/* Inputs & Buttons */
.input-group {
    margin-bottom: 20px;
}

input {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--glass-border);
    color: white;
    padding: 16px;
    border-radius: 12px;
    font-size: 1.1rem;
    outline: none;
    transition: all 0.2s ease;
    text-align: center;
}

input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 15px var(--primary-glow);
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.button-row {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}
.button-row .btn { flex: 1; }

.btn {
    padding: 16px;
    border-radius: 12px;
    border: none;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #a855f7);
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px var(--primary-glow);
    filter: brightness(1.1);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), #f43f5e);
    color: white;
    box-shadow: 0 4px 15px var(--secondary-glow);
}

.btn-secondary:hover {
    box-shadow: 0 6px 20px var(--secondary-glow);
    filter: brightness(1.1);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--glass-border);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.mt-4 { margin-top: 2rem; }

/* Status Panel */
.status-panel {
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 15px;
    margin-bottom: 20px;
    text-align: center;
}

.turn-indicator {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 5px;
}
.turn-indicator.enemy {
    color: var(--secondary);
}

.game-feedback {
    font-size: 1rem;
    color: var(--text-main);
    font-weight: 400;
}

/* History List */
.history {
    margin-top: 25px;
    background: rgba(0,0,0,0.15);
    border-radius: 12px;
    padding: 15px;
    max-height: 200px;
    overflow-y: auto;
    overscroll-behavior: contain;
    touch-action: pan-y;
}

.history h3 {
    font-size: 0.9rem;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 15px;
    text-align: center;
    letter-spacing: 1px;
}

.history ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history li {
    background: rgba(255,255,255,0.05);
    padding: 10px 15px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
}

.history li .val { font-weight: 800; }
.history li .res { font-size: 0.85rem; padding: 4px 8px; border-radius: 4px;}
.res.up { background: rgba(16, 185, 129, 0.2); color: var(--success); }
.res.down { background: rgba(239, 68, 68, 0.2); color: var(--danger); }
.res.correct { background: var(--primary-glow); color: white; }

/* In-game waiting UI */
.room-code-display {
    background: rgba(0,0,0,0.3);
    padding: 20px;
    border-radius: 16px;
    text-align: center;
    margin-bottom: 20px;
    border: 1px dashed var(--primary);
}
.room-code-display h1 {
    font-size: 3rem;
    letter-spacing: 5px;
    color: var(--primary);
    margin-top: 10px;
}
.pulse-text {
    animation: pulse 1.5s infinite;
}
@keyframes pulse {
    0% { opacity: 0.5; }
    50% { opacity: 1; }
    100% { opacity: 0.5; }
}

.winner-display {
    text-align: center;
    padding: 40px 0;
}
.winner-display h1 {
    font-size: 3rem;
    color: var(--success);
    margin-bottom: 10px;
    text-shadow: 0 0 20px rgba(16, 185, 129, 0.4);
}

/* Notifications */
#notification {
    position: fixed;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--text-main);
    color: var(--bg-darker);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    z-index: 1000;
}
#notification.show {
    bottom: 30px;
}