body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f4f6f9;
    margin: 0;
    padding: 0 0 40px 0;
    color: #222;
}

.auth-box, .result-box {
    max-width: 380px;
    margin: 80px auto;
    background: #fff;
    padding: 32px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    text-align: center;
}

.auth-box form {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.auth-box label {
    margin-top: 12px;
    font-size: 14px;
    font-weight: 600;
}

.auth-box input {
    padding: 10px;
    margin-top: 4px;
    border: 1px solid #ccc;
    border-radius: 6px;
    font-size: 15px;
}

.auth-box button, #submitBtn {
    margin-top: 20px;
    padding: 12px;
    background: #2d6cdf;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
}

.auth-box button:hover, #submitBtn:hover {
    background: #1f54b5;
}

.error {
    color: #c0392b;
    font-weight: 600;
}

.quiz-header {
    background: #2d6cdf;
    color: #fff;
    padding: 20px 30px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.quiz-header h1 {
    margin: 0 0 8px 0;
    font-size: 22px;
}

.meta {
    display: flex;
    justify-content: space-between;
    font-size: 15px;
}

.timer {
    font-weight: bold;
    font-size: 18px;
    background: rgba(255,255,255,0.15);
    padding: 4px 12px;
    border-radius: 6px;
}

.timer.warning {
    background: #e74c3c;
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

#quizForm {
    max-width: 720px;
    margin: 30px auto;
    padding: 0 20px;
}

.question-block {
    background: #fff;
    padding: 18px 20px;
    margin-bottom: 14px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.question-text {
    font-weight: 600;
    margin-bottom: 10px;
}

.option {
    display: block;
    padding: 6px 0;
    cursor: pointer;
    font-size: 15px;
}

.option input {
    margin-right: 8px;
}

.score {
    font-size: 20px;
    font-weight: bold;
    color: #2d6cdf;
}