* {
box-sizing: border-box;
 margin: 0;
font-family: system-ui, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
 }
body {
min-height: 100vh;
background: linear-gradient(145deg, #f0f2f5 0%, #dbe1e8 100%);
display: flex;
align-items: center;
justify-content: center;
padding: 16px;
margin: 0;
}
.quiz-panel {
max-width: 700px;
width: 100%;
background: rgba(255,255,255,0.7);
backdrop-filter: blur(12px);
-webkit-backdrop-filter: blur(12px);
border-radius: 42px;
box-shadow: 0 30px 50px rgba(0, 10, 20, 0.25), 0 0 0 1px rgba(255,255,255,0.5) inset;
padding: 28px 32px 36px;
transition: all 0.2s ease;
}
h1 {
font-size: 2.1rem;
            font-weight: 600;
            letter-spacing: -0.5px;
            color: #1a2639;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 8px;
            border-left: 6px solid #3a7ca5;
            padding-left: 22px;
        }
        h1 span {
            background: #1e2f4b;
            color: white;
            font-size: 1.2rem;
            font-weight: 500;
            padding: 6px 18px;
            border-radius: 60px;
            margin-left: auto;
        }
        .progress-indicator {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(10, 20, 30, 0.06);
            border-radius: 60px;
            padding: 6px 10px 6px 24px;
            margin: 12px 0 28px 0;
            font-weight: 500;
            color: #2e3b4e;
            border: 1px solid rgba(255,255,255,0.7);
        }
        .progress-text {
            font-size: 1.1rem;
        }
        .score-badge {
            background: #2a3f5e;
            color: white;
            padding: 6px 22px;
            border-radius: 40px;
            font-size: 1.1rem;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        .question-box {
            background: white;
            border-radius: 36px;
            padding: 32px 28px;
            margin: 16px 0 28px;
            box-shadow: 0 15px 30px -8px rgba(31, 47, 70, 0.2);
            border: 1px solid rgba(255,255,255,0.9);
        }
        .question-text {
            font-size: 1.7rem;
            font-weight: 600;
            line-height: 1.3;
            color: #0b1c2e;
            margin-bottom: 28px;
            word-break: break-word;
        }
        .options-grid {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .option-item {
            background: #f1f5f9;
            border-radius: 100px;
            padding: 14px 24px;
            font-size: 1.25rem;
            font-weight: 500;
            border: 2px solid transparent;
            cursor: pointer;
            transition: 0.15s;
            color: #111e2e;
            box-shadow: 0 2px 6px rgba(0,0,0,0.03);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .option-item:hover {
            background: #e5ecf5;
            border-color: #b3c9e0;
            transform: scale(1.01);
        }
        .option-item.selected {
            background: #cfe2ff;
            border-color: #1e6f9f;
            box-shadow: 0 8px 14px -8px #1e6f9f70;
        }
        .option-prefix {
            background: #2f4858;
            color: white;
            border-radius: 40px;
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            font-size: 1.2rem;
        }
        .option-item.selected .option-prefix {
            background: #0f3b5e;
        }
        .next-btn-wrapper {
            display: flex;
            justify-content: flex-end;
            margin-top: 10px;
        }
        .next-btn {
            background: #1f3a5f;
            border: none;
            color: white;
            font-size: 1.7rem;
            font-weight: 500;
            padding: 16px 48px;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 14px;
            cursor: pointer;
            box-shadow: 0 15px 25px -8px #0e2b3f;
            transition: 0.15s;
            border: 1px solid #628eb0;
            letter-spacing: 0.5px;
        }
        .next-btn:active {
            transform: scale(0.96);
            box-shadow: 0 5px 12px -4px #0e2b3f;
        }
        .next-btn:disabled {
            opacity: 0.4;
            pointer-events: none;
            filter: grayscale(0.6);
        }
        .final-screen {
            background: white;
            border-radius: 36px;
            padding: 40px 30px;
            text-align: center;
            margin: 10px 0 20px;
            box-shadow: inset 0 0 0 1px rgba(255,255,255,0.8), 0 20px 35px -10px #1e3349;
        }
        .final-heading {
            font-size: 3rem;
            font-weight: 700;
            background: linear-gradient(145deg, #1f3a5f, #3f617f);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 8px;
        }
        .final-score {
            font-size: 5rem;
            font-weight: 800;
            color: #1d3e63;
            line-height: 1.2;
            margin: 15px 0 5px;
        }
        .final-message {
            font-size: 1.5rem;
            color: #365473;
            margin-bottom: 32px;
        }
        .restart-btn {
            background: #d9e3f0;
            border: none;
            font-size: 1.5rem;
            padding: 18px 40px;
            border-radius: 60px;
            font-weight: 600;
            color: #1a2e47;
            cursor: pointer;
            transition: 0.1s;
            border: 1px solid white;
            box-shadow: 0 8px 20px rgba(0,20,40,0.2);
        }
        .restart-btn:hover {
            background: #cbd8e9;
            transform: scale(1.02);
        }
        .hidden {
            display: none !important;
        }
        hr {
            margin: 24px 0 8px;
            border: 1px solid rgba(0,0,0,0.05);
        }
        .footer-note {
            color: #4b5d73;
            font-size: 0.95rem;
            text-align: center;
            margin-top: 18px;
        }