* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #1e3c72;
    --primary-dark: #0f2b4f;
    --card-bg: #ffffff;
    --syllabus-bg: #f0f4fa;
    --badge-bg: #2c5a8c;
}

body {
    font-family: 'Segoe UI', 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #eef2f7;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    background: linear-gradient(135deg, #0b1c2e 0%, #0a1828 100%);
    color: white;
    text-align: center;
    padding: 1.8rem 1rem;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.header h1 {
    font-size: 2rem;
    letter-spacing: 1px;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.header p {
    font-size: 0.9rem;
    opacity: 0.85;
    margin-top: 8px;
}

/* ========== SYLLABUS MENU BAR STYLES ========== */
.syllabus-wrapper {
    background: var(--syllabus-bg);
    border-bottom: 1px solid #dce5f0;
    padding: 12px 20px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
}

.syllabus-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 24px;
}

.syllabus-section {
    flex: 1;
    min-width: 280px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.section-title {
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 6px;
    color: #0a2b44;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.marks-badge {
    background-color: var(--badge-bg);
    color: white;
    font-size: 0.7rem;
    padding: 3px 10px;
    border-radius: 30px;
    font-weight: 500;
}

.syllabus-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.syllabus-item {
    background: white;
    border-radius: 40px;
    padding: 6px 16px 6px 18px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.08);
    transition: all 0.2s;
    cursor: help;
    border: 1px solid #cfdfed;
    position: relative;
}

.syllabus-item:hover {
    transform: translateY(-2px);
    background: #ffffff;
    box-shadow: 0 6px 12px rgba(0,0,0,0.08);
    border-color: var(--primary-color);
}

.topic-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: #1f3b4c;
}

.marks {
    background: #e9ecef;
    border-radius: 30px;
    padding: 2px 8px;
    font-size: 0.7rem;
    font-weight: bold;
    color: #1e4663;
}

.tooltip-text {
    visibility: hidden;
    width: 220px;
    background-color: #1e2f3f;
    color: #fff;
    text-align: center;
    border-radius: 12px;
    padding: 8px 12px;
    position: absolute;
    z-index: 10;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: normal;
    white-space: normal;
    word-break: break-word;
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.syllabus-item:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

@media (max-width: 750px) {
    .syllabus-container {
        flex-direction: column;
        gap: 12px;
    }
    .syllabus-grid {
        justify-content: center;
    }
    .tooltip-text {
        width: 180px;
        font-size: 0.7rem;
    }
}

/* Q&A container */
.question-answer-container {
    background-color: #eef2f7;
    padding: 20px;
    margin: 30px auto;
    max-width: 1000px;
    border-radius: 28px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.question-number {
    background-color: var(--primary-color);
    color: white;
    display: inline-block;
    padding: 8px 20px;
    border-radius: 40px;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.question-answer {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    gap: 30px;
    background: transparent;
    padding: 0;
    border-radius: 24px;
    flex-wrap: wrap;
}

.question-answer > div {
    flex: 1;
    min-width: 240px;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 24px;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s;
    border: 1px solid rgba(0,0,0,0.03);
}

.question-answer > div:hover {
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.question-answer h4 {
    color: var(--primary-color);
    border-left: 5px solid var(--primary-color);
    padding-left: 14px;
    margin-bottom: 16px;
    font-size: 1.3rem;
    font-weight: 600;
}

.question-answer p {
    line-height: 1.55;
    font-size: 1rem;
    color: #1f2a3e;
    word-break: break-word;
    white-space: pre-wrap;
}

.nav-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
    flex-wrap: wrap;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 12px 28px;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

button:hover:not(:disabled) {
    background-color: var(--primary-dark);
    transform: scale(1.02);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

button:active:not(:disabled) {
    transform: scale(0.97);
}

button:disabled {
    background-color: #9aaebf;
    cursor: not-allowed;
    opacity: 0.6;
    transform: none;
}

.counter {
    text-align: center;
    margin-top: 20px;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(30, 60, 114, 0.08);
    display: inline-block;
    width: auto;
    padding: 6px 20px;
    border-radius: 60px;
    font-size: 0.9rem;
    margin-left: auto;
    margin-right: auto;
}

@media (max-width: 700px) {
    .question-answer {
        flex-direction: column;
        gap: 20px;
    }
    .question-answer-container {
        margin: 20px 16px;
        padding: 16px;
    }
    .header h1 {
        font-size: 1.6rem;
    }
    button {
        padding: 8px 20px;
    }
}

.topic-selector {
    display: flex;
    justify-content: center;
    margin: 20px auto 0 auto;
    max-width: 500px;
    padding: 0 16px;
}

.topic-selector select {
    padding: 12px 40px 12px 20px;
    font-size: 1rem;
    border-radius: 60px;
    cursor: pointer;
    transition: all 0.2s;
    font-weight: 600;
    background-color: white;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    outline: none;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231e3c72' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 15px center;
    background-size: 16px;
    width: 100%;
    font-family: inherit;
}

.topic-selector select:hover {
    transform: scale(1.01);
    background-color: #f5f9ff;
    border-color: var(--primary-dark);
}

.topic-selector select:focus {
    box-shadow: 0 0 0 3px rgba(30, 60, 114, 0.3);
}

footer {
    text-align: center;
    font-size: 0.75rem;
    color: #5c6f87;
    margin: 20px 0 25px;
    display: flex;
    align-items: center;
    justify-content: center;
}
footer a{
    color: #1e3c72;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px;
}
footer img{
    margin-left: 5px;
    border-radius: 50%;
}