/* ===== Global ===== */
* {
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: linear-gradient(to right, #667eea, #764ba2);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 10px;
}

/* ===== Container ===== */
.quiz-container {
    background: #fff;
    width: 100%;
    max-width: 420px;
    padding: 22px;
    border-radius: 14px;
    box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

/* ===== Username Screen ===== */
#usernameScreen h2 {
    margin-bottom: 10px;
}

#usernameScreen input {
    width: 100%;
    padding: 12px;
    margin: 12px 0;
    font-size: 16px;
    border-radius: 8px;
    border: 1px solid #ccc;
}

#usernameScreen button {
    background: #667eea;
}

/* ===== Top Bar ===== */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.progress {
    flex: 1;
    background: #ddd;
    height: 8px;
    border-radius: 10px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: #667eea;
    transition: width 0.3s ease;
}

.timer {
    font-weight: bold;
    color: #e63946;
    white-space: nowrap;
}

/* ===== Language Button ===== */
.lang-btn {
    margin: 12px 0;
    background: #333;
    color: #fff;
    border: none;
    padding: 6px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

/* ===== Question ===== */
h2 {
    text-align: center;
    font-size: 18px;
    margin: 12px 0 18px;
}

/* ===== Options (MCQ) ===== */
.options {
    list-style: none;
    padding: 0;
    margin: 0;
}

.option {
    display: flex;
    align-items: center;
    gap: 10px;
    background: #f5f7ff;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 10px;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
}

.option:hover {
    background: #eef1ff;
}

.option input[type="radio"] {
    accent-color: #667eea;
    cursor: pointer;
}

/* Checked option style (safe for all browsers) */
.option input[type="radio"]:checked + span {
    font-weight: bold;
    color: #333;
}

/* ===== Buttons ===== */
button {
    width: 100%;
    padding: 12px;
    border: none;
    background: #667eea;
    color: white;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 12px;
    transition: background 0.2s;
}

button:hover {
    background: #5563d6;
}

/* ===== History ===== */
.history {
    margin-top: 15px;
}

.history li {
    background: #f2f2f2;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 8px;
    font-size: 14px;
    line-height: 1.4;
}

/* ===== Mobile ===== */
@media (max-width: 480px) {
    h2 {
        font-size: 16px;
    }
}