body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: #f4f6fb;
    margin: 0;
    padding: 0;
}
.quiz-container {
    background: #fff;
    max-width: 900px;
    margin: 48px auto;
    padding: 0 32px 32px 32px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(44,62,80,0.12), 0 1.5px 4px rgba(44,62,80,0.08);
    position: relative;
}
.quiz-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: transparent;
    padding: 28px 0 10px 0;
    border-radius: 16px 16px 0 0;
    margin-bottom: 18px;
    font-size: 22px;
    font-weight: 600;
    letter-spacing: 0.2px;
    border-bottom: none;
    position: relative;
    min-height: 48px;
}
.quiz-qcount {
    background: #e3e8ee;
    color: #6b7685;
    font-weight: 600;
    font-size: 17px;
    border-radius: 16px;
    padding: 4px 18px;
    margin-left: auto;
    margin-right: 16px;
    display: flex;
    align-items: center;
    gap: 4px;
}
.quiz-title {
    font-weight: bold;
    font-size: 22px;
    color: #1976d2;
    padding-left: 8px;
}
#lang-btn {
    position: static;
    margin-left: 0;
    margin-right: 0;
    background: #f7faff;
    color: #1976d2;
    border: 1.5px solid #dde3ee;
    border-radius: 8px;
    padding: 7px 18px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border 0.2s;
    box-shadow: none;
}
#lang-btn:hover {
    background: #1976d2;
    color: #fff;
    border: 1.5px solid #1976d2;
}
#question {
    font-size: 19px;
    margin-bottom: 22px;
    margin-top: 10px;
    color: #222e3a;
    font-weight: 500;
}
#options label {
    display: flex;
    align-items: center;
    background: #f7faff;
    border: 1.5px solid #dde3ee;
    border-radius: 7px;
    padding: 10px 14px;
    margin-bottom: 14px;
    cursor: pointer;
    transition: border 0.2s, background 0.2s;
    font-size: 17px;
    color: #2d3a4a;
}
#options label:hover {
    border: 1.5px solid #1976d2;
    background: #eaf2fd;
}
#options input[type="radio"] {
    margin-right: 12px;
    accent-color: #1976d2;
    width: 18px;
    height: 18px;
}
#submit {
    margin-top: 12px;
    padding: 10px 28px;
    font-size: 17px;
    background: #1976d2;
    color: #fff;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    font-weight: 500;
    box-shadow: 0 1px 4px rgba(44,62,80,0.08);
    transition: background 0.2s;
}
#submit:hover {
    background: #1256a3;
}

#next-btn {
    margin-top: 12px;
    padding: 10px 28px;
    font-size: 17px;
    background: #43a047;
    color: #fff;
    border: none;
    border-radius: 7px;
    cursor: pointer;
    font-weight: 500;
    box-shadow: 0 1px 4px rgba(44,62,80,0.08);
    transition: background 0.2s;
}
#next-btn:hover {
    background: #2e7031;
}
#feedback {
    margin-top: 18px;
    font-weight: bold;
    font-size: 17px;
    min-height: 24px;
}
#feedback {
    color: #d32f2f;
}
#feedback:empty {
    min-height: 0;
}
#explanation {
    margin-top: 18px;
    background: #f1f6fb;
    padding: 14px 18px;
    border-radius: 6px;
    color: #2d3a4a;
    font-size: 16px;
    border-left: 4px solid #1976d2;
    box-shadow: 0 1px 4px rgba(44,62,80,0.04);
}
.hidden {
    display: none;
}
.dropdown-question {
    display: flex;
    align-items: flex-start;
    margin-bottom: 18px;
    gap: 0 18px;
}
.dropdown-question > div {
    flex: 2;
    min-width: 340px;
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 0;
    margin-right: 28px;
    word-break: normal;
    white-space: normal;
    color: #2d3a4a;
}
.dropdown-question select {
    min-width: 220px;
    font-size: 17px;
    padding: 7px 10px;
    border-radius: 6px;
    border: 1.5px solid #dde3ee;
    background: #f7faff;
    color: #222e3a;
    transition: border 0.2s;
}
.dropdown-question select:focus {
    border: 1.5px solid #1976d2;
    outline: none;
}
.drag-area {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    justify-content: flex-start;
    flex-wrap: wrap;
}
.drag-item {
    padding: 10px 10px;
    background: #f7faff;
    border: 1.5px solid #dde3ee;
    border-radius: 10px;
    cursor: grab;
    font-weight: 500;
    font-size: 16px;
    text-align: center;
    user-select: none;
    box-shadow: 0 1px 4px rgba(44,62,80,0.04);
    transition: background 0.2s, border 0.2s;
    word-break: break-word;
    min-width: 0;
    max-width: 260px;
}
/* Drag columns layout */
.dragcol-container {
    display: flex;
    gap: 24px;
    justify-content: center;
    align-items: flex-start;
    margin-top: 12px;
    flex-wrap: wrap;
}
.dragcol-list {
    min-width: 180px;
    max-width: 320px;
    min-height: 220px;
    background: #f7faff;
    border: 1.5px solid #dde3ee;
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.dragcol-list-right {
    background: #fff;
}
.dragcol-title {
    font-weight: bold;
    margin-bottom: 8px;
}
.dragcol-btns {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    margin: 0 8px;
}
.dragcol-btns button {
    font-size: 22px;
    padding: 4px 10px;
    cursor: pointer;
}
@media (max-width: 900px) {
    .quiz-container {
        max-width: 99vw;
        padding: 0 4vw 32px 4vw;
    }
    .dragcol-container {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    .dragcol-list, .dragcol-list-right {
        min-width: 0;
        max-width: 100%;
    }
}
.drag-item:active {
    background: #e3eaf7;
}
.drop-target {
    display: flex;
    align-items: center;
    margin-bottom: 18px;
}
.drop-target > div:first-child {
    flex: 2;
    font-size: 17px;
    line-height: 1.5;
    margin-right: 24px;
    color: #2d3a4a;
}
.drop-zone {
    min-width: 100px;
    min-height: 38px;
    background: #f7faff;
    border: 1.5px dashed #b0b8c9;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    font-size: 16px;
    color: #1976d2;
    margin-left: 8px;
    transition: background 0.2s, border 0.2s;
}
@media (max-width: 800px) {
    .dropdown-question > div {
        min-width: 180px;
        font-size: 16px;
        margin-right: 10px;
    }
    .dropdown-question select {
        min-width: 120px;
        font-size: 15px;
    }
}
@media (max-width: 600px) {
    .dropdown-question {
        flex-direction: column;
        align-items: stretch;
        gap: 8px 0;
    }
    .dropdown-question > div {
        min-width: 0;
        margin-right: 0;
        margin-bottom: 6px;
        font-size: 15px;
    }
    .dropdown-question select {
        min-width: 100px;
        font-size: 15px;
    }
}