/* NAD+ Therapy Section - Reimagined */

:root {
    --nad-primary: #1FBDC6;
    --nad-gradient-start: #1FBDC6;
    --nad-gradient-end: #17a2aa;
    --nad-accent: #FF4533;
    --nad-dark: #111827;
    --nad-gray: #4B5563;
    --nad-light-bg: #F8FAFC;
    --nad-white: #FFFFFF;
}

/* NAD Section Container */
.nad {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--nad-light-bg) 0%, #ffffff 50%, var(--nad-light-bg) 100%);
    position: relative;
    overflow: hidden;
}

/* Hero Header */
.nad-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 60px;
    position: relative;
    z-index: 2;
}

.nad-hero-content {
    max-width: 600px;
}

.nad-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    color: white;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 20px;
}

.nad-badge i {
    font-size: 16px;
}

.nad-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    color: var(--nad-dark);
}

.nad-title .highlight {
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nad-subtitle {
    font-size: 20px;
    color: var(--nad-gray);
    margin-bottom: 32px;
    line-height: 1.6;
}

/* Quick Stats */
.nad-quick-stats {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.quick-stat {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background: white;
    border-radius: 50px;
    box-shadow: 0 4px 12px rgba(31, 189, 198, 0.1);
    transition: all 0.3s ease;
}

.quick-stat:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(31, 189, 198, 0.2);
}

.quick-stat i {
    color: var(--nad-primary);
    font-size: 18px;
}

.quick-stat span {
    font-size: 14px;
    font-weight: 600;
    color: var(--nad-dark);
}

/* Molecular Animation */
.nad-hero-visual {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.molecular-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.molecule {
    position: absolute;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    border-radius: 50%;
    opacity: 0.2;
    animation: float 8s ease-in-out infinite;
}

.molecule:nth-child(1) {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.molecule:nth-child(2) {
    top: 50%;
    right: 20%;
    width: 80px;
    height: 80px;
    animation-delay: 2s;
}

.molecule:nth-child(3) {
    bottom: 20%;
    left: 30%;
    width: 50px;
    height: 50px;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    50% {
        transform: translate(30px, -30px) scale(1.2);
    }
}

/* Navigation Tabs */
.nad-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.nad-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    background: white;
    border: 2px solid transparent;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    color: var(--nad-gray);
    cursor: pointer;
    transition: all 0.3s ease;
}

.nad-tab i {
    font-size: 16px;
}

.nad-tab:hover {
    border-color: var(--nad-primary);
    color: var(--nad-primary);
    transform: translateY(-2px);
}

.nad-tab.active {
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    border-color: transparent;
    color: white;
    box-shadow: 0 4px 16px rgba(31, 189, 198, 0.3);
}

/* Tab Content */
.nad-content-wrapper {
    position: relative;
}

.nad-tab-content {
    display: none;
    animation: fadeInUp 0.5s ease;
}

.nad-tab-content.active {
    display: block;
}

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

/* Overview Tab Styles */
.nad-overview-grid {
    display: grid;
    gap: 32px;
}

.nad-info-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
}

.nad-info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--nad-gradient-start), var(--nad-gradient-end));
}

.info-card-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.info-card-icon i {
    font-size: 32px;
    color: white;
}

.nad-info-card h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--nad-dark);
}

.nad-info-card p {
    font-size: 16px;
    color: var(--nad-gray);
    line-height: 1.7;
    margin-bottom: 24px;
}

/* Info Highlights */
.info-highlights {
    display: grid;
    gap: 12px;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--nad-light-bg);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.highlight-item:hover {
    background: #e6f8f9;
    transform: translateX(8px);
}

.highlight-item i {
    color: var(--nad-primary);
    font-size: 18px;
}

.highlight-item span {
    font-size: 15px;
    font-weight: 600;
    color: var(--nad-dark);
}

/* Stats Row */
.nad-stats-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.nad-stat-card {
    background: white;
    padding: 32px;
    border-radius: 20px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    text-align: center;
    transition: all 0.3s ease;
}

.nad-stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(31, 189, 198, 0.15);
}

.stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.stat-icon i {
    font-size: 28px;
    color: white;
}

.stat-number {
    font-size: 42px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 15px;
    color: var(--nad-gray);
    font-weight: 500;
}

/* Process Card */
.nad-process-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.nad-process-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 32px;
    color: var(--nad-dark);
    display: flex;
    align-items: center;
    gap: 12px;
}

.nad-process-card h3 i {
    color: var(--nad-primary);
}

/* Process Timeline */
.process-timeline {
    display: grid;
    gap: 20px;
}

.process-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    padding: 20px;
    background: var(--nad-light-bg);
    border-radius: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.process-step:hover {
    transform: translateX(12px);
    background: #e6f8f9;
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.step-info h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--nad-dark);
}

.step-info p {
    font-size: 15px;
    color: var(--nad-gray);
    line-height: 1.6;
}

/* Benefits Tab Styles */
.nad-benefits-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.benefit-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.benefit-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--nad-gradient-start), var(--nad-gradient-end));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

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

.benefit-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(31, 189, 198, 0.15);
}

.benefit-card-header {
    margin-bottom: 20px;
}

.benefit-icon-large {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.benefit-icon-large i {
    font-size: 32px;
    color: white;
}

.benefit-card h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--nad-dark);
}

.benefit-card > p {
    font-size: 16px;
    color: var(--nad-gray);
    margin-bottom: 24px;
    line-height: 1.6;
}

.benefit-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.benefit-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 0;
    font-size: 15px;
    color: var(--nad-gray);
    border-bottom: 1px solid #e5e7eb;
}

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

.benefit-list i {
    color: var(--nad-primary);
    font-size: 16px;
}

/* Pricing Tab Styles */
.nad-pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    margin-bottom: 40px;
}

.pricing-card {
    background: white;
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
    position: relative;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.pricing-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 32px rgba(31, 189, 198, 0.15);
}

.pricing-card.featured {
    border-color: var(--nad-primary);
    transform: scale(1.05);
    box-shadow: 0 16px 40px rgba(31, 189, 198, 0.2);
}

.popular-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    color: white;
    padding: 6px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(31, 189, 198, 0.3);
}

.pricing-header {
    text-align: center;
    margin-bottom: 28px;
    padding-bottom: 28px;
    border-bottom: 2px solid #f0f0f0;
}

.pricing-header h3 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--nad-dark);
}

.pricing-amount {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    margin-bottom: 16px;
}

.currency {
    font-size: 28px;
    font-weight: 700;
    color: var(--nad-primary);
    margin-top: 8px;
}

.price {
    font-size: 56px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.dosage-info {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.dosage, .duration {
    font-size: 14px;
    color: var(--nad-gray);
    font-weight: 500;
}

.dosage {
    padding: 6px 16px;
    background: var(--nad-light-bg);
    border-radius: 50px;
}

.pricing-features {
    margin-bottom: 28px;
}

.pricing-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 0;
    font-size: 15px;
    color: var(--nad-gray);
}

.pricing-features i {
    color: var(--nad-primary);
    font-size: 16px;
}

.pricing-btn {
    width: 100%;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--nad-gradient-start), var(--nad-gradient-end));
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.pricing-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(31, 189, 198, 0.3);
}

.pricing-btn i {
    transition: transform 0.3s ease;
}

.pricing-btn:hover i {
    transform: translateX(4px);
}

.pricing-note {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
    background: #f0f9ff;
    border-radius: 16px;
    border-left: 4px solid var(--nad-primary);
}

.pricing-note i {
    color: var(--nad-primary);
    font-size: 20px;
    margin-top: 2px;
}

.pricing-note p {
    font-size: 14px;
    color: var(--nad-gray);
    line-height: 1.6;
    margin: 0;
}

/* FAQ Tab Styles */
.nad-faq-grid {
    display: grid;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.faq-card {
    background: white;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-card:hover {
    box-shadow: 0 8px 24px rgba(31, 189, 198, 0.1);
}

.faq-card-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-card-question:hover {
    background: var(--nad-light-bg);
}

.faq-card-question h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--nad-dark);
    margin: 0;
}

.faq-card-question i {
    color: var(--nad-primary);
    font-size: 18px;
    transition: transform 0.3s ease;
}

.faq-card.active .faq-card-question i {
    transform: rotate(180deg);
}

.faq-card-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-card.active .faq-card-answer {
    max-height: 500px;
    padding: 0 24px 24px;
}

.faq-card-answer p {
    font-size: 15px;
    color: var(--nad-gray);
    line-height: 1.7;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .nad-hero {
        gap: 40px;
    }

    .nad-title {
        font-size: 48px;
    }
}

@media (max-width: 992px) {
    .nad-hero {
        grid-template-columns: 1fr;
        text-align: center;
    }

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

    .nad-quick-stats {
        justify-content: center;
    }

    .nad-stats-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .nad-benefits-grid {
        grid-template-columns: 1fr;
    }

    .nad-pricing-grid {
        grid-template-columns: 1fr;
    }

    .pricing-card.featured {
        transform: none;
    }
}

@media (max-width: 768px) {
    .nad {
        padding: 60px 0;
    }

    .nad-title {
        font-size: 36px;
    }

    .nad-subtitle {
        font-size: 18px;
    }

    .nad-hero-visual {
        height: 300px;
    }

    .molecular-animation {
        width: 200px;
        height: 200px;
    }

    .nad-tabs {
        gap: 8px;
    }

    .nad-tab {
        padding: 12px 20px;
        font-size: 14px;
    }

    .nad-tab span {
        display: none;
    }

    .nad-tab i {
        margin: 0;
    }

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

    .nad-info-card,
    .nad-process-card,
    .benefit-card,
    .pricing-card {
        padding: 28px;
    }
}

@media (max-width: 480px) {
    .nad-title {
        font-size: 32px;
    }

    .nad-subtitle {
        font-size: 16px;
    }

    .quick-stat {
        padding: 10px 16px;
    }

    .quick-stat span {
        font-size: 13px;
    }

    .nad-info-card,
    .nad-process-card,
    .benefit-card,
    .pricing-card {
        padding: 24px;
    }

    .process-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .price {
        font-size: 48px;
    }
}