/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 1rem;
    color: #666;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 85, 255, 0.1);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}

.logo {
    width: 40px;
    height: 40px;
    display: block;
    object-fit: contain;
    padding: 4px;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid rgba(0, 85, 255, 0.12);
    box-shadow: 0 6px 16px rgba(0, 85, 255, 0.16);
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0055FF;
    line-height: 1;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #0055FF;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: #0055FF;
    border-radius: 1px;
}

.download-btn {
    background: #0055FF;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 85, 255, 0.3);
}

.download-btn:hover {
    background: #0044DD;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 85, 255, 0.4);
}

.mobile-menu-toggle,
.mobile-nav-drawer,
.hero-cta-mobile,
.mobile-sticky-cta {
    display: none;
}

body.mobile-nav-open {
    overflow: hidden;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 540px;
    height: 540px;
    right: -140px;
    top: 80px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 85, 255, 0.12) 0%, rgba(0, 85, 255, 0) 70%);
    pointer-events: none;
}

.hero .container {
    display: grid;
    grid-template-columns: minmax(0, 1.06fr) minmax(500px, 0.94fr);
    gap: clamp(2rem, 3.2vw, 3.5rem);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 640px;
    width: 100%;
}

.hero-copy-stack {
    display: grid;
    gap: 1.15rem;
}

.hero-title {
    font-size: clamp(2.7rem, 4.8vw, 4.1rem);
    font-weight: 700;
    line-height: 1.06;
    letter-spacing: -0.03em;
    margin-bottom: 0;
    color: #1a1a1a;
    max-width: none;
    margin-right: 0;
}

.highlight {
    color: #0055FF;
    position: relative;
}

.highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0055FF, #00AAFF);
    border-radius: 2px;
    opacity: 0.3;
}

.hero-subtitle {
    font-size: clamp(1.05rem, 1.65vw, 1.28rem);
    line-height: 1.55;
    margin-bottom: 0;
    color: #666;
    max-width: 620px;
}

.hero-actions {
    display: grid;
    gap: 0.8rem;
    margin-top: 0.35rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    align-items: stretch;
    flex-wrap: nowrap;
}

.hero-proof {
    margin-bottom: 0;
    font-size: clamp(0.84rem, 1vw, 0.95rem);
    color: #1d4ed8;
    font-weight: 600;
    white-space: normal;
    line-height: 1.35;
    max-width: 640px;
}

.cta-primary,
.cta-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 3.5rem;
    padding: 1rem 2rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.cta-primary {
    background: #0055FF;
    color: white;
    box-shadow: 0 4px 20px rgba(0, 85, 255, 0.3);
}

.cta-primary:hover {
    background: #0044DD;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 85, 255, 0.4);
}

.cta-secondary {
    background: rgba(248, 251, 255, 0.96);
    color: #1d4ed8;
    border: 1.5px solid rgba(0, 85, 255, 0.28);
    box-shadow: none;
}

.cta-secondary:hover {
    background: rgba(239, 245, 255, 0.98);
    color: #1842b0;
    border-color: rgba(0, 85, 255, 0.46);
    transform: translateY(-2px);
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem 0.75rem;
    margin-top: 1rem;
    max-width: 560px;
}

.feature-pill {
    display: flex;
    align-items: center;
    gap: 0.58rem;
    background: white;
    padding: 0.75rem 1rem;
    border-radius: 50px;
    border: 1px solid rgba(0, 85, 255, 0.2);
    font-size: 0.9rem;
    font-weight: 560;
    color: #1e293b;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.pill-icon {
    width: 18px;
    height: 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #0055FF;
    flex-shrink: 0;
}

.pill-icon svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.9;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* Browser Mockup */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
}

.hero-visual::before {
    content: '';
    position: absolute;
    width: 116%;
    max-width: 700px;
    height: 280px;
    left: 50%;
    bottom: -58px;
    transform: translateX(-50%);
    background: radial-gradient(ellipse at center, rgba(0, 85, 255, 0.11) 0%, rgba(0, 85, 255, 0.05) 42%, rgba(0, 85, 255, 0) 78%);
    filter: blur(22px);
    pointer-events: none;
}

.hero-visual::after {
    content: '';
    position: absolute;
    width: 52%;
    height: 140px;
    left: 24%;
    bottom: 8px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(56, 189, 248, 0.07), rgba(59, 130, 246, 0.06));
    filter: blur(20px);
    pointer-events: none;
}

.browser-stage {
    position: relative;
    width: min(100%, 640px);
    transform: none;
    animation: none;
    z-index: 1;
}

.browser-stage::before {
    content: none;
}

.browser-mockup-container {
    width: min(100%, 640px);
    position: relative;
    z-index: 1;
    margin: 0 auto;
    transform: scale(1.03);
    transform-origin: center;
}

.browser-mockup {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 16px;
    box-shadow: 0 20px 55px rgba(2, 6, 23, 0.08);
    overflow: hidden;
    width: 100%;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.browser-header {
    background: #f8fafc;
    padding: 0.9rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid #e2e8f0;
}

.browser-controls {
    display: flex;
    gap: 0.35rem;
}

.control {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.control.red { background: #ff5f57; }
.control.yellow { background: #ffbd2e; }
.control.green { background: #28ca42; }

.browser-url {
    background: white;
    border: 1px solid #e2e8f0;
    padding: 0.4rem 0.75rem;
    border-radius: 999px;
    color: #64748b;
    font-size: 0.8rem;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.browser-content {
    padding: clamp(0.95rem, 2vw, 1.35rem);
}

.quiz-question {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.quiz-label {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #0055FF;
    margin-bottom: 0.35rem;
    text-transform: uppercase;
}

.quiz-prompt {
    margin-bottom: 0.8rem;
    color: #0f172a;
    font-size: 0.9rem;
    line-height: 1.45;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

.option {
    padding: 0.58rem 0.7rem;
    border: 1px solid #cbd5e1;
    border-radius: 9px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.86rem;
    line-height: 1.2;
    color: #334155;
}

.option.selected {
    border-color: #0055FF;
    background: rgba(0, 85, 255, 0.06);
    color: #0f172a;
    font-weight: 600;
    justify-content: flex-start;
    gap: 0.3rem;
}

.option:hover {
    border-color: #0055FF;
    background: rgba(0, 85, 255, 0.04);
}

.ai-dot {
    width: 4.84px;
    height: 4.84px;
    background: #0055FF;
    border-radius: 50%;
    display: inline-block;
    opacity: 0;
    flex-shrink: 0;
    animation: reveal-dot 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) 2s forwards, pulse-splash 2s infinite 2.6s;
}

.dot-hint {
    margin-top: 8px;
    font-size: 0.67rem;
    color: #1d4ed8;
    font-weight: 700;
    letter-spacing: 0.01em;
    line-height: 1.25;
    text-align: left;
    opacity: 0;
    animation: reveal-hint 0.8s cubic-bezier(0.4, 0, 0.2, 1) 3.5s forwards;
}

@keyframes reveal-dot {
    from {
        opacity: 0;
        transform: scale(0);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes reveal-hint {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse-splash {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.1);
    }
}

/* Study Ribbon */
.study-ribbon {
    position: relative;
    overflow: hidden;
    background: #0055FF;
}

.study-ribbon::before {
    display: none;
}

.study-ribbon-content {
    position: relative;
    z-index: 1;
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.study-ribbon-content p {
    margin: 0;
    color: white;
    font-size: clamp(1rem, 1.45vw, 1.4rem);
    font-weight: 700;
    line-height: 1.2;
}

.study-ribbon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: white;
    color: #0055FF;
    border-radius: 999px;
    padding: 0.56rem 1.35rem;
    font-size: clamp(0.9rem, 1vw, 1rem);
    font-weight: 700;
    text-decoration: none;
    white-space: nowrap;
    box-shadow: 0 8px 20px rgba(2, 6, 23, 0.15);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.study-ribbon-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 34px rgba(2, 6, 23, 0.22);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    margin-bottom: 1rem;
    color: #1a1a1a;
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 6rem 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    border: 1px solid rgba(0, 85, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #0055FF, #00AAFF);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 85, 255, 0.15);
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: #ffffff;
    border: 1px solid rgba(2, 6, 23, 0.12);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #0f172a;
    margin-bottom: 1rem;
    box-shadow: 0 6px 18px rgba(2, 6, 23, 0.06);
    transition: transform 0.2s ease, box-shadow 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.feature-icon svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.feature-card:hover .feature-icon {
    color: #0055FF;
    border-color: rgba(0, 85, 255, 0.34);
    box-shadow: 0 10px 24px rgba(0, 85, 255, 0.18);
    transform: translateY(-1px);
}

.feature-card h3 {
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.feature-card p {
    margin-bottom: 1.5rem;
    color: #666;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 0.5rem 0;
    color: #666;
    position: relative;
    padding-left: 1.5rem;
}

.feature-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #0055FF;
    font-weight: 600;
}

/* How It Works Section */
.how-it-works {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
}

.steps-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
}

.step {
    text-align: center;
    position: relative;
}

.step-number {
    width: 80px;
    height: 80px;
    background: #0055FF;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    margin: 0 auto 2rem;
    box-shadow: 0 8px 30px rgba(0, 85, 255, 0.3);
}

.step-content h3 {
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.step-content p {
    color: #666;
    font-size: 1.1rem;
}

/* Pricing Section */
.pricing {
    padding: 6rem 0;
    background: white;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    border: 2px solid rgba(0, 85, 255, 0.1);
    border-radius: 20px;
    padding: 2.5rem;
    text-align: center;
    position: relative;
    transition: all 0.3s ease;
}

.pricing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 85, 255, 0.15);
}

.pricing-card.featured {
    border-color: #0055FF;
    transform: scale(1.05);
    box-shadow: 0 12px 40px rgba(0, 85, 255, 0.2);
}

.popular-badge {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    background: #0055FF;
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.pricing-header h3 {
    color: #1a1a1a;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.price {
    margin-bottom: 2rem;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 0.25rem;
}

.currency {
    font-size: 1.5rem;
    color: #0055FF;
    font-weight: 600;
}

.amount {
    font-size: 3rem;
    font-weight: 700;
    color: #0055FF;
}

.period {
    font-size: 1.2rem;
    color: #666;
    font-weight: 500;
}

.pricing-features {
    margin-bottom: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    text-align: left;
}

.checkmark {
    color: #0055FF;
    font-weight: 600;
    font-size: 1.2rem;
}

.pricing-btn {
    width: 100%;
    padding: 1rem 2rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.pricing-btn.primary {
    background: #0055FF;
    color: white;
    box-shadow: 0 4px 20px rgba(0, 85, 255, 0.3);
}

.pricing-btn.primary:hover {
    background: #0044DD;
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 85, 255, 0.4);
}

.pricing-btn.secondary {
    background: transparent;
    color: #0055FF;
    border: 2px solid #0055FF;
}

.pricing-btn.secondary:hover {
    background: #0055FF;
    color: white;
}

/* FAQ Section */
.faq {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border: 1px solid rgba(0, 85, 255, 0.1);
    border-radius: 12px;
    margin-bottom: 1rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    box-shadow: 0 4px 20px rgba(0, 85, 255, 0.1);
}

.faq-question {
    padding: 1.5rem 2rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: white;
    transition: background 0.3s ease;
}

.faq-question:hover {
    background: rgba(0, 85, 255, 0.02);
}

.faq-question h3 {
    color: #1a1a1a;
    margin: 0;
    font-size: 1.1rem;
}

.faq-toggle {
    font-size: 1.5rem;
    color: #0055FF;
    font-weight: 300;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 2rem 1.5rem;
    display: none;
    background: rgba(0, 85, 255, 0.02);
}

.faq-item.active .faq-answer {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* Academic Integrity Page Styles */
.page-hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
    text-align: center;
}

.page-hero-content h1 {
    color: #1a1a1a;
    margin-bottom: 1rem;
}

.page-hero-subtitle {
    font-size: 1.25rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.academic-content {
    padding: 4rem 0;
    background: white;
}

.content-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.content-section h2 {
    color: #1a1a1a;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

.content-section p {
    color: #666;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.benefit-list {
    list-style: none;
    margin-left: 1rem;
}

.benefit-list li {
    padding: 0.5rem 0;
    color: #666;
    position: relative;
    padding-left: 1.5rem;
}

.benefit-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #0055FF;
    font-weight: 600;
}

.guideline-card {
    background: #f8faff;
    border: 1px solid rgba(0, 85, 255, 0.1);
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.guideline-card h3 {
    color: #1a1a1a;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.guideline-list {
    list-style: none;
}

.guideline-list li {
    padding: 0.75rem 0;
    color: #666;
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.6;
}

.guideline-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #0055FF;
    font-weight: 600;
    font-size: 1.2rem;
}

.responsibility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.responsibility-item {
    text-align: center;
    padding: 2rem;
    background: #f8faff;
    border-radius: 12px;
    border: 1px solid rgba(0, 85, 255, 0.1);
}

.responsibility-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.responsibility-item h4 {
    color: #1a1a1a;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.responsibility-item p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
}

.feature-highlight {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    background: #f8faff;
    border-radius: 12px;
    border: 1px solid rgba(0, 85, 255, 0.1);
    margin-bottom: 2rem;
}

.feature-highlight-content h3 {
    color: #1a1a1a;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.feature-highlight-content p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

.feature-highlight-icon {
    font-size: 3rem;
    flex-shrink: 0;
}

.warning-card {
    background: #fff5f5;
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 1rem;
}

.warning-card h3 {
    color: #dc2626;
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.warning-list {
    list-style: none;
}

.warning-list li {
    padding: 0.75rem 0;
    color: #666;
    position: relative;
    padding-left: 1.5rem;
    line-height: 1.6;
}

.warning-list li::before {
    content: '⚠️';
    position: absolute;
    left: 0;
    font-size: 1rem;
}

.study-tips {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tip {
    padding: 1.5rem;
    background: #f8faff;
    border-radius: 12px;
    border: 1px solid rgba(0, 85, 255, 0.1);
}

.tip h4 {
    color: #0055FF;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.tip p {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.reporting-info {
    background: #f0f9ff;
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 1rem;
}

.reporting-info p {
    margin-bottom: 0.75rem;
    color: #666;
}

.reporting-info a {
    color: #0055FF;
    text-decoration: none;
    font-weight: 500;
}

.reporting-info a:hover {
    text-decoration: underline;
}

.honor-footer {
    text-align: center;
    padding: 2rem;
    background: #f8faff;
    border-radius: 12px;
    border: 1px solid rgba(0, 85, 255, 0.1);
}

.honor-footer p {
    color: #666;
    margin: 0;
    font-size: 1.1rem;
}

.honor-footer a {
    color: #0055FF;
    text-decoration: none;
    font-weight: 500;
}

.honor-footer a:hover {
    text-decoration: underline;
}

/* Sidebar Styles */
.sidebar {
    position: sticky;
    top: 100px;
}

.sidebar-card {
    background: white;
    border: 1px solid rgba(0, 85, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.sidebar-card h3 {
    color: #1a1a1a;
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
}

.sidebar-card p {
    color: #666;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.quick-ref-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(0, 85, 255, 0.1);
}

.quick-ref-item:last-child {
    border-bottom: none;
}

.ref-icon {
    font-size: 1.2rem;
    flex-shrink: 0;
}

.quick-ref-item span:last-child {
    color: #666;
    font-size: 0.9rem;
    line-height: 1.4;
}

.sidebar-btn {
    display: inline-block;
    background: #0055FF;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all 0.3s ease;
    text-align: center;
    width: 100%;
}

.sidebar-btn:hover {
    background: #0044DD;
    transform: translateY(-2px);
}

.sidebar-btn.secondary {
    background: transparent;
    color: #0055FF;
    border: 2px solid #0055FF;
}

.sidebar-btn.secondary:hover {
    background: #0055FF;
    color: white;
}

/* Contact Info Styles */
.contact-info {
    background: #f8faff;
    border: 1px solid rgba(0, 85, 255, 0.1);
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1rem;
}

.contact-info p {
    margin-bottom: 0.75rem;
    color: #666;
    line-height: 1.6;
}

.contact-info p:last-child {
    margin-bottom: 0;
}

.contact-info a {
    color: #0055FF;
    text-decoration: none;
    font-weight: 500;
}

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

/* Footer */
.footer {
    background: #1a1a1a;
    color: white;
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

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

.footer-section ul li {
    margin-bottom: 0.75rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #0055FF;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

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

.footer-download-btn {
    display: inline-block;
    background: #0055FF;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-bottom: 1rem;
}

.footer-download-btn:hover {
    background: #0044DD;
    transform: translateY(-2px);
}

.footer-note {
    color: #999;
    font-size: 0.9rem;
}

.footer-bottom {
    border-top: 1px solid #333;
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: #999;
    margin: 0;
}

.company-note {
    margin-top: 0.5rem !important;
    font-size: 0.9rem;
    color: #777 !important;
    font-style: italic;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
        gap: clamp(1.8rem, 3vw, 2.8rem);
    }

    .browser-stage {
        width: min(100%, 640px);
        transform: none;
        animation: none;
    }

    .browser-mockup-container {
        transform: scale(1.015);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
        min-height: 56px;
        gap: 0.65rem;
    }
    
    .nav-menu {
        display: none;
    }

    .download-btn {
        display: none;
    }

    .mobile-menu-toggle {
        width: 44px;
        height: 44px;
        display: inline-flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 4px;
        border: 1px solid rgba(0, 85, 255, 0.2);
        border-radius: 12px;
        background: white;
        padding: 0;
        cursor: pointer;
        flex-shrink: 0;
    }

    .mobile-menu-toggle span {
        width: 18px;
        height: 2px;
        border-radius: 999px;
        background: #0055FF;
        transition: transform 0.2s ease, opacity 0.2s ease;
    }

    .mobile-menu-toggle.is-open span:nth-child(1) {
        transform: translateY(6px) rotate(45deg);
    }

    .mobile-menu-toggle.is-open span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.is-open span:nth-child(3) {
        transform: translateY(-6px) rotate(-45deg);
    }

    .mobile-nav-drawer {
        display: block;
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        z-index: 1001;
        background: rgba(255, 255, 255, 0.98);
        border-bottom: 1px solid rgba(0, 85, 255, 0.14);
        box-shadow: 0 16px 36px rgba(2, 6, 23, 0.08);
        backdrop-filter: blur(10px);
        opacity: 0;
        transform: translateY(-10px);
        pointer-events: none;
        transition: opacity 0.2s ease, transform 0.2s ease;
    }

    .mobile-nav-drawer.is-open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .mobile-nav-content {
        display: flex;
        flex-direction: column;
        gap: 0.25rem;
        padding: 0.8rem 1rem 1rem;
    }

    .mobile-nav-link {
        display: flex;
        align-items: center;
        min-height: 44px;
        padding: 0 0.55rem;
        border-radius: 10px;
        color: #1e293b;
        text-decoration: none;
        font-weight: 600;
    }

    .mobile-nav-download {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-height: 44px;
        margin-top: 0.35rem;
        border-radius: 12px;
        text-decoration: none;
        font-weight: 700;
        background: #0055FF;
        color: white;
        box-shadow: 0 8px 20px rgba(0, 85, 255, 0.25);
    }

    #home,
    #features,
    #video-showcase,
    #how-it-works,
    #pricing,
    #faq {
        scroll-margin-top: 84px;
    }

    .hero {
        padding: 6.35rem 0 2.5rem;
        min-height: auto;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.35rem;
    }

    .hero-content {
        max-width: none;
    }

    .hero-copy-stack {
        gap: 0.8rem;
    }
    
    .hero-title {
        font-size: 2.25rem;
        margin-right: 0;
        max-width: none;
        line-height: 1.08;
    }

    .hero-subtitle {
        font-size: 1.05rem;
        line-height: 1.45;
        margin-left: auto;
        margin-right: auto;
        max-width: 480px;
    }

    .hero-actions {
        margin-top: 0.35rem;
        gap: 0.65rem;
        justify-items: center;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 0.75rem;
    }

    .hero-actions .hero-cta {
        display: none;
    }

    .hero-cta-mobile {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
        width: 100%;
    }

    .cta-primary,
    .cta-secondary {
        width: min(100%, 340px);
        min-height: 48px;
    }

    .hero-proof {
        margin-bottom: 0;
        white-space: normal;
        line-height: 1.4;
        max-width: 520px;
        margin-left: auto;
        margin-right: auto;
        font-size: 0.92rem;
    }

    .hero-features {
        max-width: 400px;
        justify-content: center;
        margin-left: auto;
        margin-right: auto;
        gap: 0.6rem;
    }

    .hero-visual {
        margin-top: 0.3rem;
    }

    .hero-visual::before,
    .hero-visual::after {
        width: 100%;
        left: 0;
        transform: none;
    }

    .browser-stage {
        width: min(100%, 620px);
        transform: none;
        animation: none;
    }

    .browser-mockup-container {
        width: 100%;
        transform: none;
    }
    
    .browser-content {
        padding: 1rem;
    }

    .features,
    .video-showcase,
    .how-it-works,
    .pricing,
    .faq {
        padding: 4rem 0;
    }

    .section-header {
        margin-bottom: 2.4rem;
    }

    .section-header p {
        font-size: 1.02rem;
    }

    .study-ribbon-content {
        min-height: auto;
        padding-top: 0.75rem;
        padding-bottom: 0.75rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 0.65rem;
    }

    .study-ribbon {
        display: none;
    }

    .study-ribbon-content p {
        font-size: 0.95rem;
    }

    .study-ribbon-btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
        min-height: 44px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        grid-template-columns: 1fr;
    }
    
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .pricing-card.featured {
        transform: none;
    }

    .pricing-btn,
    .footer-download-btn {
        min-height: 44px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .faq-question {
        padding: 1rem;
        min-height: 52px;
    }

    .faq-question h3 {
        font-size: 1rem;
    }

    .faq-answer {
        padding: 0 1rem 1rem;
    }

    .footer {
        padding: 3rem 0 calc(6rem + env(safe-area-inset-bottom));
    }

    .mobile-sticky-cta {
        display: block;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1100;
        background: rgba(255, 255, 255, 0.98);
        border-top: 1px solid rgba(0, 85, 255, 0.14);
        backdrop-filter: blur(9px);
        padding: 0.6rem 1rem calc(0.6rem + env(safe-area-inset-bottom));
        transform: translateY(120%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .mobile-sticky-cta.is-visible {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    body.mobile-nav-open .mobile-sticky-cta {
        transform: translateY(120%);
        opacity: 0;
        pointer-events: none;
    }

    .mobile-sticky-cta-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 48px;
        border-radius: 12px;
        text-decoration: none;
        font-weight: 700;
        background: #0055FF;
        color: white;
        box-shadow: 0 10px 24px rgba(0, 85, 255, 0.24);
    }

    body.mobile-sticky-visible {
        padding-bottom: calc(84px + env(safe-area-inset-bottom));
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .sidebar {
        position: static;
        order: -1;
    }

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

    .feature-highlight {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .study-tips {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .navbar {
        padding: 0.7rem 0;
    }

    .nav-logo {
        gap: 0.5rem;
    }

    .nav-logo .logo {
        width: 34px;
        height: 34px;
        padding: 3px;
        border-radius: 10px;
    }

    .nav-logo .logo-text {
        font-size: 1.2rem;
    }

    .mobile-nav-drawer {
        top: 64px;
    }

    .hero {
        padding-top: 5.85rem;
        padding-bottom: 2.2rem;
    }

    .hero-title {
        font-size: 1.95rem;
        line-height: 1.1;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-features {
        gap: 0.55rem;
    }

    .feature-pill {
        font-size: 0.84rem;
        padding: 0.64rem 0.85rem;
    }

    .mobile-sticky-cta {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .feature-card,
    .pricing-card {
        padding: 1.5rem;
    }

    .page-hero-content h1 {
        font-size: 2.5rem;
    }

    .content-section h2 {
        font-size: 1.5rem;
    }

    .guideline-card,
    .warning-card,
    .reporting-info {
        padding: 1.5rem;
    }

    .sidebar-card {
        padding: 1.5rem;
    }
}

/* Featured Video Section */
.featured-video {
    margin: 3rem 0;
}

.featured-video-card {
    width: 100%;
    max-width: 860px;
    margin: 0 auto;
    padding: 0.4rem;
    border-radius: 16px;
    border: 1px solid rgba(15, 23, 42, 0.1);
    background: #ffffff;
    box-shadow: 0 10px 24px rgba(2, 6, 23, 0.08);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.featured-video-card:focus-within {
    border-color: rgba(0, 85, 255, 0.22);
    box-shadow: 0 12px 28px rgba(2, 6, 23, 0.1);
}

.featured-video-stage {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 12px;
    overflow: hidden;
    background: #000;
}

.featured-video-stage iframe {
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

/* Responsive video styles */
@media (max-width: 768px) {
    .featured-video {
        margin: 2rem 0;
    }

    .featured-video-card {
        padding: 0.35rem;
        border-radius: 14px;
    }

    .featured-video-stage {
        border-radius: 10px;
    }
}

@media (max-width: 480px) {
    .featured-video-card {
        padding: 0.3rem;
    }
}

/* Video Showcase Section */
.video-showcase {
    padding: 6rem 0;
    background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
}

.video-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.video-card {
    background: white;
    border: 1px solid rgba(0, 85, 255, 0.1);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 85, 255, 0.15);
}

/* Mobile touch styles for video cards */
@media (hover: none) and (pointer: coarse) {
    .download-btn:hover,
    .cta-primary:hover,
    .cta-secondary:hover,
    .pricing-btn.primary:hover,
    .pricing-btn.secondary:hover,
    .footer-download-btn:hover,
    .feature-card:hover,
    .pricing-card:hover,
    .video-card:hover {
        transform: none;
    }

    .video-card {
        cursor: pointer;
    }

    .video-card:active {
        transform: translateY(-2px);
        box-shadow: 0 8px 30px rgba(0, 85, 255, 0.2);
        transition: all 0.1s ease;
    }
}

 /* Active video indicator */
.video-card.playing {
    border-color: #0055FF;
    box-shadow: 0 0 0 2px rgba(0, 85, 255, 0.3), 0 8px 30px rgba(0, 85, 255, 0.15);
}

.video-card.playing .video-container::after {
    content: '';
    position: absolute;
    top: 10px;
    right: 10px;
    width: 0;
    height: 0;
    border-left: 8px solid #0055FF;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    z-index: 2;
}

.video-container {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: #000;
}

.video-container video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}





.video-info {
    padding: 1.5rem;
}

.video-info h3 {
    color: #1a1a1a;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.video-info p {
    color: #666;
    line-height: 1.6;
    margin: 0;
    font-size: 0.95rem;
}

/* Responsive adjustments for video section */
@media (max-width: 768px) {
    .video-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .video-card .video-container::before {
        content: 'Tap to play';
        position: absolute;
        inset: 0;
        display: flex;
        align-items: center;
        justify-content: center;
        color: white;
        font-size: 0.95rem;
        font-weight: 600;
        letter-spacing: 0.01em;
        background: linear-gradient(to top, rgba(2, 6, 23, 0.58), rgba(2, 6, 23, 0.22));
        z-index: 2;
        pointer-events: none;
        transition: opacity 0.2s ease;
    }

    .video-card.playing .video-container::before {
        opacity: 0;
    }

    .video-card.playing .video-container::after {
        content: none;
    }

    .video-container {
        height: 180px;
    }
    
    .video-info {
        padding: 1.25rem;
    }
}