:root {
    --background-card: #ffffff;
    --text-main: #222222;
    --text-heading: #333333;
    --background-body: #f4f4f9;
    --border-color: #eeeeee;
    --button-background: #ffffff;
    --button-border: #cccccc;
    --button-hover: #ffe5b4;
    --bg-selected: #e6f2ff;
    --text-selected: #000;
    --bg-correct: #d4edda;
    --text-correct: #000;
    --bg-wrong: #f8d7da;
    --text-wrong: #000;
}

.dark-mode {
    --background-body: #121212;
    --background-card: #1e1e1e;
    --text-main: #e0e0e0;
    --text-heading: #ffffff;
    --border-color: #333333;
    --button-background: #2d2d2d;
    --button-border: #444444;
    --button-hover: #3d3d3d;
    --bg-selected: #052c65;
    --text-selected: #cfe2ff;
    --bg-correct: #0f5132;
    --text-correct: #ffffff;
    --bg-wrong: #842029;
    --text-wrong: #ffffff;
}

body {
    font-family: Arial, sans-serif;
    background: var(--background-body);
    color: var(--text-main);
    margin: 5px;
    padding: 10px;
    transition: 0.3s;
    overflow-x: hidden;
}

.main-container {
    width: 100%;
    max-width: 100%;
    min-height: 90vh;
    box-sizing: border-box;
    margin: 0;
    background: var(--background-card);
    padding: 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: 0.3s;
}

.inner-container {
    max-width: 800px;
    margin: 40px auto 0 auto;
    background: var(--background-body);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
}

h1,
h2 {
    text-align: center;
    color: var(--text-heading);
    margin: 0 0 25px 0;
}

.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 15px;
    margin-bottom: 20px;
}

.theme-toggle {
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 5px;
    border: 1px solid var(--button-border);
    background: var(--button-background);
    color: var(--text-main);
}

.master-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
}

.course-btn {
    padding: 25px 20px;
    background: var(--button-background);
    color: var(--text-main);
    border: 1px solid var(--button-border);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2em;
    font-weight: bold;
    text-align: center;
    transition: 0.2s;
    box-sizing: border-box;
}

.course-btn:hover {
    background: var(--button-hover);
}

.course-btn:nth-child(1) {
    grid-column: 1 / -1;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-auto-flow: row;
    gap: 25px;
    width: 100%;
    box-sizing: border-box;
}

.module-btn {
    padding: 15px;
    background: var(--button-background);
    color: var(--text-main);
    border: 1px solid var(--button-border);
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    box-sizing: border-box;
    text-align: center;
    word-wrap: break-word;
}

.module-btn:nth-child(1) {
    grid-column: 1 / -1;
}

.module-btn:hover {
    background: var(--button-hover);
}

.all-weeks-btn {
    width: 100%;
    background: #007bff;
    color: white;
    border: none;
    margin-bottom: 25px;
    margin-top: 25px;
    padding: 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    box-sizing: border-box;
}

.mock-test-btn {
    width: 100%;
    background: #1eaa51;
    color: white;
    border: none;
    padding: 15px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    box-sizing: border-box;
}

.all-weeks-btn:hover {
    background: #797383;
}

.mock-test-btn:hover {
    background: #8a7415;
}

.quiz-layout {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.question-area {
    flex: 1;
}

.palette-area {
    width: 300px;
    background: var(--background-body);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    box-sizing: border-box;
}

.palette-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 8px;
    margin-bottom: 15px;
}

.palette-btn {
    padding: 10px 0;
    text-align: center;
    border: 1px solid var(--button-border);
    background: var(--button-background);
    color: var(--text-main);
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

.palette-btn.attempted {
    background: #007bff;
    color: white;
    border-color: #0056b3;
}

.palette-btn.current {
    border: 2px solid #ffc107;
    box-shadow: 0 0 5px rgba(255, 193, 7, 0.5);
}

.legend {
    font-size: 0.85em;
    margin-bottom: 15px;
    text-align: center;
}

.legend-box {
    display: inline-block;
    width: 12px;
    height: 12px;
    border: 1px solid var(--button-border);
    border-radius: 2px;
}

.legend-box.attempted {
    background: #007bff;
    border-color: #0056b3;
}

.legend-box.unattempted {
    background: var(--button-background);
}

.back-btn {
    background: #6c757d;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.back-btn:hover {
    background: #c71e26;
}

.small-btn {
    padding: 8px 12px;
    font-size: 0.9em;
}

.question-box {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

.question-text {
    font-weight: bold;
    font-size: 1.1em;
    line-height: 1.4;
}

.options-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option-btn {
    padding: 12px;
    border: 1px solid var(--button-border);
    background: var(--button-background);
    color: var(--text-main);
    border-radius: 5px;
    cursor: pointer;
    text-align: left;
    font-size: 1em;
    transition: 0.2s;
}

.option-btn:hover {
    background: var(--button-hover);
}

.selected {
    border-color: #007bff;
    background: var(--bg-selected);
    color: var(--text-selected);
    font-weight: bold;
}

.correct {
    border-color: #28a745;
    background: var(--bg-correct);
    color: var(--text-correct);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 5px;
}

.wrong {
    border-color: #dc3545;
    background: var(--bg-wrong);
    color: var(--text-wrong);
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 5px;
}

.nav-btn {
    flex: 1;
    padding: 12px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
    font-weight: bold;
}

#prev-btn {
    background: #6c757d;
    color: white;
}

#next-btn {
    background: #ffc107;
    color: #000;
}

.submit-btn {
    width: 100%;
    background: #28a745;
    color: white;
    padding: 12px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1.1em;
    font-weight: bold;
    margin-top: 10px;
}

.submit-btn:hover {
    background: #218838;
}

@media (max-width: 768px) {
    .main-container {
        padding: 15px;
    }
    .inner-container {
        padding: 20px;
        margin-top: 20px;
    }
    .quiz-layout {
        flex-direction: column;
    }
    .palette-area {
        width: 100%;
        align-self: stretch;
    }
    .top-bar {
        flex-direction: column;
        gap: 10px;
    }
    .module-btn {
        padding: 10px 5px;
        font-size: 0.9em;
    }
    .master-grid {
        grid-template-columns: 1fr;
    }
    .course-btn:nth-child(1) {
        grid-column: auto;
    }
}