@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    /* Sophisticated, modern color palette (Slate/Blue-gray base) */
    --primary: #0f172a;       /* Slate 900 */
    --primary-light: #334155; /* Slate 700 */
    --secondary: #64748b;     /* Slate 500 */
    --success: #10b981;       /* Emerald 500 */
    --warning: #f59e0b;       /* Amber 500 */
    --danger: #ef4444;        /* Red 500 */
    --info: #3b82f6;          /* Blue 500 */
    
    --light: #ffffff;
    --dark: #0f172a;
    --text-muted: #475569;    /* Slate 600 */
    --bg-color: #f8fafc;      /* Slate 50 */
    --border-color: #e2e8f0;  /* Slate 200 */
    
    /* Elegant answer colors */
    --ans-red: #ef4444;
    --ans-blue: #3b82f6;
    --ans-yellow: #f59e0b;
    --ans-green: #10b981;

    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--dark);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4 { 
    margin-bottom: 1rem; 
    font-weight: 600;
    color: var(--primary);
    letter-spacing: -0.025em;
}

p {
    color: var(--text-muted);
}

a { 
    text-decoration: none; 
    color: var(--info); 
    transition: color 0.15s ease;
}
a:hover { 
    color: #2563eb; /* Blue 600 */
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 500;
    text-align: center;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    letter-spacing: 0.01em;
}
.btn:focus {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--light);
}
.btn-primary:hover {
    background-color: #1e293b; /* Slate 800 */
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--light);
    color: var(--primary);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background-color: #f1f5f9; /* Slate 100 */
    border-color: #cbd5e1; /* Slate 300 */
}

.btn-success {
    background-color: var(--success);
    color: var(--light);
}
.btn-success:hover {
    background-color: #059669; /* Emerald 600 */
    box-shadow: var(--shadow-md);
}

.btn-danger {
    background-color: var(--danger);
    color: var(--light);
}
.btn-danger:hover {
    background-color: #dc2626; /* Red 600 */
}

.btn-block {
    display: flex;
    width: 100%;
}

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary-light);
}
.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    color: var(--dark);
    background-color: var(--light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.form-control:focus {
    border-color: var(--info);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}
.form-control::placeholder {
    color: #94a3b8; /* Slate 400 */
}

/* Cards & Containers */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}
.card {
    background-color: var(--light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s ease;
}
.card:hover {
    box-shadow: var(--shadow-md);
}

/* Main Layout */
header {
    background-color: var(--light);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 10;
}
header .logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.025em;
}
header nav a {
    margin-left: 1.5rem;
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 500;
}
header nav a:hover {
    color: var(--primary);
}

/* Utilities */
.text-center { text-align: center; }
.mt-4 { margin-top: 1.5rem; }
.mb-4 { margin-bottom: 1.5rem; }

/* Answer Buttons (Sleek, Modern) */
.answer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}
.ans-btn {
    min-height: 100px;
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--light);
    background-color: var(--primary-light);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}
.ans-btn::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 100%);
    pointer-events: none;
}
.ans-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.05);
}
.ans-btn:active {
    transform: translateY(0);
    box-shadow: var(--shadow-sm);
}

/* Sophisticated Answer Colors */
.ans-red { background-color: var(--ans-red); }
.ans-blue { background-color: var(--ans-blue); }
.ans-yellow { background-color: var(--ans-yellow); color: #fff; }
.ans-green { background-color: var(--ans-green); }

/* specific pages */
.center-box-wrapper {
    display: flex;
    flex-grow: 1;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-color);
    padding: 2rem;
}
.center-box {
    width: 100%;
    max-width: 420px;
}

/* Player state components */
.player-chip {
    display: inline-flex;
    align-items: center;
    background-color: var(--light);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    color: var(--primary);
    font-weight: 500;
    font-size: 0.95rem;
    margin: 0.25rem;
    box-shadow: var(--shadow-sm);
}

.host-bg {
    background-color: var(--bg-color);
    color: var(--dark);
}

.chart-bar {
    border-radius: var(--radius-sm);
}