:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --white: #ffffff;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: var(--text-dark);
    background-color: var(--white);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    color: var(--secondary-color);
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--secondary-color);
}

.btn-login {
    background: var(--secondary-color);
    color: var(--white);
    border: none;
    padding: 0.6rem 1.5rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.btn-login:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 5px 0;
    transition: var(--transition);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 100px 0;
    display: flex;
    align-items: center;
    min-height: 600px;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.hero-content h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.hero-image {
    position: relative;
    height: 300px;
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: 20px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
}

.floating-card p {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.9rem;
}

.floating-card:nth-child(1) {
    top: 20px;
    left: 0;
}

.floating-card:nth-child(2) {
    top: 100px;
    right: 20px;
}

.floating-card:nth-child(3) {
    bottom: 0;
    left: 50px;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-secondary {
    background: var(--light-bg);
    color: var(--primary-color);
    border: 2px solid var(--secondary-color);
}

.btn-secondary:hover {
    background: var(--secondary-color);
    color: var(--white);
}

.btn-outline {
    background: transparent;
    color: var(--secondary-color);
    border: 2px solid var(--secondary-color);
}

.btn-outline:hover {
    background: var(--secondary-color);
    color: var(--white);
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.1rem;
    width: 100%;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: var(--white);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--light-bg);
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: var(--secondary-color);
    box-shadow: var(--shadow);
}

.feature-card i {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.feature-card p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Generator Section */
.generator {
    padding: 80px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.generator h2 {
    font-size: 2.2rem;
    color: var(--primary-color);
    margin-bottom: 30px;
}

.generator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.form-section {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.exam-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group select {
    padding: 12px 15px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
    font-family: inherit;
}

.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.slider {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: linear-gradient(to right, var(--secondary-color), var(--accent-color));
    outline: none;
    -webkit-appearance: none;
    margin: 10px 0;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    box-shadow: var(--shadow);
}

.slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
    box-shadow: var(--shadow);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 10px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 10px;
    border-radius: 6px;
    transition: var(--transition);
}

.checkbox-label:hover {
    background: var(--light-bg);
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--secondary-color);
}

.checkbox-label span {
    font-weight: 500;
    color: var(--text-dark);
}

/* AI Loading Animation */
.ai-loader {
    animation: slideIn 0.5s ease;
    background: var(--white);
    padding: 50px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    margin: 20px 0;
}

.spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    border: 4px solid var(--light-bg);
    border-top: 4px solid var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.mcq-options {
    background: #f0f4ff;
    padding: 12px;
    margin-top: 8px;
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text-dark);
    border-left: 3px solid var(--secondary-color);
}

/* Exam Paper Display */
.exam-paper-section {
    animation: slideIn 0.5s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.exam-paper {
    background: var(--white);
    padding: 50px;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    max-height: 600px;
    overflow-y: auto;
    border: 2px solid var(--border-color);
}

.paper-header {
    text-align: center;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 20px;
    margin-bottom: 30px;
}

.school-name {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 5px;
}

.exam-title {
    font-size: 1.3rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.paper-info {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 10px;
    background: var(--light-bg);
    border-radius: 6px;
}

.info-label {
    font-weight: 600;
    color: var(--primary-color);
}

.info-value {
    color: var(--text-dark);
}

.instructions {
    background: #fffbeb;
    border-left: 4px solid var(--accent-color);
    padding: 15px;
    margin: 20px 0;
    border-radius: 6px;
}

.instructions h4 {
    color: var(--primary-color);
    margin-bottom: 8px;
}

.instructions ol {
    margin-left: 20px;
    color: var(--text-dark);
    font-size: 0.9rem;
}

.instructions li {
    margin-bottom: 5px;
}

.question-section {
    margin: 25px 0;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

.question-section:last-child {
    border-bottom: none;
}

.question-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 10px;
}

.question-number {
    background: var(--primary-color);
    color: var(--white);
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.question-text {
    flex: 1;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.question-meta {
    display: flex;
    gap: 15px;
    margin-top: 8px;
    font-size: 0.85rem;
}

.marks-badge {
    background: var(--success-color);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
}

.difficulty-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 600;
}

.difficulty-easy {
    background: #d1fae5;
    color: #065f46;
}

.difficulty-medium {
    background: #fef3c7;
    color: #92400e;
}

.difficulty-hard {
    background: #fee2e2;
    color: #991b1b;
}

.answer-space {
    background: var(--light-bg);
    border: 1px dashed var(--border-color);
    padding: 30px 20px;
    margin-top: 10px;
    border-radius: 6px;
    color: var(--text-light);
    font-style: italic;
    font-size: 0.9rem;
}

.page-break {
    page-break-after: always;
    margin: 30px 0;
    padding: 20px 0;
    text-align: center;
    border-top: 2px dashed var(--border-color);
    color: var(--text-light);
    font-size: 0.85rem;
}

.paper-actions {
    display: flex;
    gap: 15px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.paper-actions .btn {
    flex: 1;
    min-width: 150px;
}

/* Pricing Section */
.pricing {
    padding: 80px 0;
    background: var(--light-bg);
}

.pricing h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.pricing-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 50px;
    font-size: 1.1rem;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.pricing-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 2px solid transparent;
    position: relative;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
    transform: scale(1.05);
    border-color: var(--secondary-color);
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
}

.price-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--secondary-color);
    color: var(--white);
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

.pricing-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.price {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--secondary-color);
    margin: 20px 0;
}

.price span {
    font-size: 1rem;
    color: var(--text-light);
    font-weight: 500;
}

.features-list {
    list-style: none;
    margin: 30px 0;
}

.features-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-dark);
}

.features-list li i {
    color: var(--success-color);
    font-weight: bold;
}

.features-list li i.fa-times {
    color: var(--danger-color);
}

.features-list li:last-child {
    border-bottom: none;
}

.pricing-card .btn {
    width: 100%;
    justify-content: center;
    margin-top: 20px;
}

/* Contact Section */
.contact {
    padding: 80px 0;
    background: var(--white);
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 50px;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.contact-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 40px 30px;
    border-radius: 12px;
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow);
}

.contact-card i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.contact-card h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.contact-card p {
    color: var(--text-dark);
    margin-bottom: 5px;
}

.contact-card a {
    color: var(--secondary-color);
    text-decoration: none;
    font-weight: 600;
}

.contact-card a:hover {
    text-decoration: underline;
}

.contact-subtext {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.footer-section p {
    color: #cbd5e1;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #cbd5e1;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--white);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--secondary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
    color: #cbd5e1;
}

/* Print Styles */
@media print {
    .navbar,
    .hero,
    .features,
    .generator-wrapper .form-section,
    .pricing,
    .contact,
    .footer,
    .paper-actions {
        display: none !important;
    }

    .exam-paper {
        max-height: none;
        box-shadow: none;
        border: none;
        padding: 0;
    }

    body {
        background: white;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        gap: 20px;
        padding: 20px;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        max-height: 500px;
    }

    .hero .container {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 30px 0;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-image {
        display: none;
    }

    .features h2 {
        font-size: 2rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .generator-wrapper {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .exam-paper {
        padding: 30px 20px;
        max-height: 500px;
    }

    .paper-info {
        grid-template-columns: 1fr;
    }

    .paper-actions {
        flex-direction: column;
    }

    .paper-actions .btn {
        width: 100%;
    }

    .pricing-card.featured {
        transform: scale(1);
    }

    .pricing h2 {
        font-size: 2rem;
    }

    .contact h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .btn-large {
        padding: 12px 25px;
        font-size: 0.95rem;
    }

    .exam-paper {
        padding: 20px 15px;
    }

    .paper-header {
        padding-bottom: 15px;
    }

    .school-name {
        font-size: 1.2rem;
    }

    .exam-title {
        font-size: 1rem;
    }

    .question-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .question-number {
        width: 30px;
        height: 30px;
        font-size: 0.85rem;
    }

    .question-meta {
        flex-direction: column;
        gap: 8px;
    }

    .paper-info {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .form-group input,
    .form-group select {
        font-size: 16px;
    }

    .logo {
        font-size: 1.4rem;
    }

    .nav-menu {
        gap: 10px;
    }
}