/* ============================================================
   NerveCell DTC - Stylesheet (matching producer structure)
   ============================================================ */

/* ==================== VARIABLES ==================== */
:root {
    --primary: #181042;
    --primary-light: #2a1a6e;
    --primary-deep: #0f0a2e;
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --green: #16a34a;
    --green-hover: #15803d;
    --green-light: #22c55e;
    --gold: #f59e0b;
    --gold-bright: #fbbf24;
    --red: #dc2626;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --text-light: #94a3b8;
    --border: #e2e8f0;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);
    --radius: 12px;
    --radius-lg: 16px;
}

/* ==================== BASE ==================== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
body, html { overflow-x: hidden; width: 100%; }
body { font-family: 'Inter', -apple-system, sans-serif; color: var(--text-dark); font-size: 16px; line-height: 1.6; background: var(--bg-white); }
img { max-width: 100%; height: auto; display: block; }
.container { width: 100%; max-width: 1140px; margin: 0 auto; padding: 0 20px; }

/* ==================== ANIMATIONS ==================== */
.fade-up { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
@keyframes pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.05); } }

/* ==================== CTA STRIP ==================== */
.claim-strip { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); padding: 28px 0; text-align: center; }
.claim-strip h2 { color: #fff; font-size: 1.75rem; font-weight: 800; margin-bottom: 4px; }
.claim-strip p { color: rgba(255, 255, 255, .8); font-size: 1.05rem; font-weight: 500; }

/* ==================== PRICING ==================== */
.pricing-section { padding: 50px 0 60px; background: var(--bg-light); }
.pricing-section .section-title { text-align: center; font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 40px; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: end; }
.pricing-card { background: var(--bg-white); border-radius: var(--radius-lg); border: 2px solid var(--border); box-shadow: var(--shadow); transition: transform .3s ease; overflow: hidden; }
.pricing-card:hover { transform: translateY(-8px); }
.pricing-card.featured { border: 3px solid var(--gold); box-shadow: var(--shadow-xl); transform: scale(1.03); position: relative; z-index: 1; }
.pricing-card.featured:hover { transform: scale(1.06); }

.pricing-label { background: var(--primary); color: #fff; text-align: center; padding: 12px; font-size: .85rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; }
.pricing-card.featured .pricing-label { background: linear-gradient(135deg, #f59e0b, #d97706); color: var(--primary); font-size: .95rem; }

.pricing-body { padding: 24px 20px 28px; text-align: center; }
.pricing-qty { font-size: 1.5rem; font-weight: 800; color: var(--primary); margin-bottom: 2px; }
.pricing-supply { font-size: .9rem; color: var(--text-gray); margin-bottom: 16px; }

.pricing-img { max-width: 220px; max-height: 200px; width: auto; height: auto; object-fit: contain; margin: 0 auto 16px; display: block; }
.pricing-card.featured .pricing-img { max-width: 240px; max-height: 240px; }

.pricing-price { display: flex; align-items: flex-start; justify-content: center; gap: 2px; margin-bottom: 16px; color: var(--primary); }
.price-dollar { font-size: 1.5rem; font-weight: 700; margin-top: 8px; }
.price-big { font-size: 4rem; font-weight: 900; line-height: 1; }
.price-per { font-size: .85rem; font-weight: 600; text-align: left; line-height: 1.2; margin-top: 12px; color: var(--text-gray); }

.pricing-checks { list-style: none; text-align: left; margin: 0 auto 16px; max-width: 240px; }
.pricing-checks li { padding: 6px 0; font-size: .9rem; font-weight: 500; display: flex; align-items: center; gap: 8px; color: var(--text-dark); }
.pricing-checks .check-icon { color: var(--green); font-size: 1.1rem; flex-shrink: 0; }
.pricing-checks .x-icon { color: var(--text-light); font-size: 1rem; flex-shrink: 0; }
.check-disabled { color: var(--text-light) !important; text-decoration: line-through; }

.pricing-savings { font-size: .95rem; font-weight: 700; color: var(--green); margin-bottom: 16px; }

.btn-buy { display: block; width: 100%; padding: 16px; background: var(--green); color: #fff; font-size: 1.1rem; font-weight: 700; text-align: center; text-decoration: none; border-radius: 10px; transition: background .3s; cursor: pointer; border: none; letter-spacing: .5px; font-family: inherit; }
.btn-buy:hover { background: var(--green-hover); }
.pricing-card.featured .btn-buy { animation: pulse 2s infinite; font-size: 1.2rem; padding: 18px; background: linear-gradient(135deg, #22c55e, #16a34a); }

.pricing-bottom { margin-top: 12px; padding-top: 12px; border-top: 1px solid var(--border); }
.pricing-retail { font-size: .9rem; color: var(--text-gray); text-decoration: line-through; }
.pricing-total { font-size: 1.1rem; font-weight: 700; color: var(--primary); }
.pricing-shipping { font-size: .85rem; color: var(--text-gray); }
.pricing-free-shipping { color: var(--green); font-weight: 700; }

/* ==================== GUARANTEE ==================== */
.guarantee-section { padding: 60px 0; background: var(--bg-white); }
.guarantee-title { text-align: center; font-size: 1.75rem; font-weight: 800; color: var(--primary); margin-bottom: 30px; }
.guarantee-content { display: flex; align-items: center; gap: 30px; max-width: 800px; margin: 0 auto 30px; }
.guarantee-badge { width: 160px; flex-shrink: 0; }
.guarantee-copy { font-size: .95rem; line-height: 1.7; color: var(--text-dark); }
.guarantee-fda { max-width: 500px; width: 100%; margin: 0 auto 16px; }
.guarantee-mfg { text-align: center; font-size: .9rem; color: var(--text-gray); }

/* ==================== BONUSES ==================== */
.bonuses-section { padding: 60px 0; background: var(--bg-light); }
.bonuses-section h2 { text-align: center; font-size: 1.75rem; font-weight: 800; color: var(--primary); margin-bottom: 40px; }
.bonuses-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 900px; margin: 0 auto; }
.bonus-card { background: var(--bg-white); border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow); border: 1px solid var(--border); text-align: center; }
.bonus-card-img { width: 160px; margin: 0 auto 16px; }
.bonus-card-img img { border-radius: 8px; }
.bonus-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.bonus-price { font-size: .95rem; margin-bottom: 14px; }
.bonus-price s { color: var(--text-light); }
.bonus-price strong { color: var(--green); }
.bonus-card p.bonus-desc { font-size: .9rem; line-height: 1.6; color: var(--text-gray); text-align: left; }
.bonus-digital { color: var(--red); font-weight: 700; font-size: .85rem; margin-top: 14px; letter-spacing: .5px; }

/* ==================== SHIPPING STRIP ==================== */
.shipping-strip { background: var(--bg-white); padding: 40px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.shipping-content { display: flex; align-items: center; justify-content: center; gap: 24px; text-align: left; }
.shipping-seal { width: 80px; flex-shrink: 0; }
.shipping-text h3 { font-size: 1.3rem; font-weight: 700; color: var(--text-dark); }
.shipping-highlight { color: var(--green); }
.shipping-text p { font-size: .95rem; color: var(--text-gray); margin-top: 4px; }

/* ==================== ABOUT / SCIENCE ==================== */
.about-header { background: linear-gradient(135deg, var(--primary-deep) 0%, var(--primary) 100%); padding: 60px 0; text-align: center; position: relative; overflow: hidden; }
.about-header::before { content: ''; position: absolute; inset: 0; background: radial-gradient(circle at 30% 50%, rgba(79, 70, 229, .25), transparent 50%), radial-gradient(circle at 70% 50%, rgba(245, 158, 11, .12), transparent 50%); pointer-events: none; }
.about-header .container { position: relative; z-index: 1; }
.about-date { color: var(--gold-bright); font-size: .85rem; font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; margin-bottom: 14px; }
.about-header h2 { color: #fff; font-size: 2.25rem; font-weight: 800; line-height: 1.25; max-width: 880px; margin: 0 auto 14px; }
.about-underline { position: relative; display: inline-block; }
.about-underline::after { content: ''; position: absolute; left: 0; right: 0; bottom: -2px; height: 4px; background: var(--gold-bright); border-radius: 2px; }
.about-subtitle { color: rgba(255, 255, 255, .85); font-size: 1.1rem; font-style: italic; max-width: 700px; margin: 0 auto; }

.about-content { padding: 70px 0; background: var(--bg-white); }
.about-block { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 50px; align-items: center; margin-bottom: 36px; }
.about-block--media-left { grid-template-columns: 0.9fr 1.1fr; }
.about-block--media-left .about-block__media { order: -1; }
.about-block__body p { font-size: 1rem; color: var(--text-gray); line-height: 1.75; margin-bottom: 14px; }
.about-block__body p strong { color: var(--text-dark); }
.about-block__body h3 { font-size: 1.65rem; font-weight: 800; color: var(--primary); margin-bottom: 16px; line-height: 1.3; }
.about-block__media img { width: 100%; max-width: 380px; margin: 0 auto; display: block; border-radius: var(--radius-lg); }
.about-block--media-left .about-block__media img { box-shadow: var(--shadow-lg); }
.about-highlight { background: linear-gradient(135deg, rgba(79, 70, 229, .06), rgba(79, 70, 229, .02)); border-left: 4px solid var(--accent); padding: 16px 20px; border-radius: 0 8px 8px 0; margin-top: 6px !important; }
.about-good-news { color: var(--green); font-weight: 800; }

.quote-callout { background: linear-gradient(135deg, rgba(24, 16, 66, .04), rgba(24, 16, 66, .01)); border-left: 4px solid var(--primary); padding: 22px 26px; border-radius: 0 12px 12px 0; max-width: 900px; margin: 0 auto 36px; }
.quote-callout p { font-size: 1.02rem; color: var(--text-dark); line-height: 1.7; font-style: italic; margin-bottom: 12px; }
.quote-reference { font-size: .8rem; color: var(--text-gray); font-style: normal !important; line-height: 1.5; margin-bottom: 0 !important; }
.quote-reference__label { font-weight: 700; color: var(--primary); margin-right: 4px; }
.quote-reference em { font-style: italic; color: var(--text-dark); }
.quote-reference__link { display: inline-flex; align-items: center; gap: 4px; color: var(--accent); text-decoration: none; font-weight: 600; margin-left: 6px; }
.quote-reference__link:hover { text-decoration: underline; }

/* ==================== PRODUCT INTRO ==================== */
.product-intro-section { background: linear-gradient(135deg, var(--primary-deep) 0%, var(--primary) 50%, var(--primary-light) 100%); padding: 70px 0; position: relative; overflow: hidden; }
.product-intro-section::before { content: ''; position: absolute; top: -30%; right: -10%; width: 60%; height: 160%; background: radial-gradient(ellipse at center, rgba(79, 70, 229, .25), transparent 70%); pointer-events: none; }
.product-intro-content { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 50px; align-items: center; position: relative; z-index: 1; }
.product-intro-text .product-intro-lead { color: rgba(255, 255, 255, .7); font-size: 1rem; font-weight: 500; letter-spacing: .5px; margin-bottom: 6px; }
.product-intro-name { color: #fff; font-size: 3rem; font-weight: 900; margin-bottom: 22px; letter-spacing: -1px; }
.product-intro-text p { color: rgba(255, 255, 255, .85); font-size: 1rem; line-height: 1.75; margin-bottom: 14px; }
.product-intro-text p strong { color: #fff; font-weight: 700; }
.product-intro-bottle { position: relative; text-align: center; }
.product-intro-bottle .bottle { max-width: 420px; margin: 0 auto; filter: drop-shadow(0 30px 40px rgba(0, 0, 0, .4)); }
.product-intro-seal { position: absolute; top: 10px; left: 10%; width: 130px; filter: drop-shadow(0 8px 16px rgba(0, 0, 0, .3)); }

/* ==================== INGREDIENTS (CIRCULAR) ==================== */
.ingredients-section { padding: 70px 0; background: var(--bg-white); }
.ingredients-header { text-align: center; max-width: 760px; margin: 0 auto 50px; }
.ingredients-header h2 { font-size: 2.1rem; font-weight: 800; color: var(--primary); line-height: 1.3; }

.ingredients-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 30px; max-width: 980px; margin: 0 auto; }
.ingredients-grid .ingredient-card:nth-child(4) { grid-column: 1 / 2; grid-column-start: 1; }
.ingredient-card { text-align: center; padding: 0 10px; }
.ing-circle { width: 140px; height: 140px; border-radius: 50%; overflow: hidden; margin: 0 auto 18px; box-shadow: 0 8px 24px rgba(24, 16, 66, .15); border: 4px solid var(--bg-white); position: relative; }
.ing-circle img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.ingredient-card:hover .ing-circle img { transform: scale(1.08); }
.ingredient-card h3 { font-size: 1.15rem; font-weight: 800; color: var(--primary); margin-bottom: 4px; }
.ing-latin { font-size: .85rem; color: var(--text-light); font-style: italic; margin-bottom: 12px; }
.ing-desc { font-size: .9rem; color: var(--text-gray); line-height: 1.65; max-width: 280px; margin: 0 auto; }

/* Layout: 3 em cima, 2 centralizados embaixo */
@media (min-width: 993px) {
    .ingredients-grid { grid-template-columns: repeat(6, 1fr); }
    .ingredients-grid .ingredient-card:nth-child(1) { grid-column: 1 / 3; }
    .ingredients-grid .ingredient-card:nth-child(2) { grid-column: 3 / 5; }
    .ingredients-grid .ingredient-card:nth-child(3) { grid-column: 5 / 7; }
    .ingredients-grid .ingredient-card:nth-child(4) { grid-column: 2 / 4; }
    .ingredients-grid .ingredient-card:nth-child(5) { grid-column: 4 / 6; }
}

/* ==================== BENEFITS (3x2 grid) ==================== */
.benefits-section { padding: 70px 0; background: var(--bg-light); }
.benefits-section h2 { text-align: center; font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 50px; }
.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px 30px; max-width: 880px; margin: 0 auto; }
.benefit-card { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 14px; padding: 16px; }
.benefit-icon { width: 78px; height: 78px; display: flex; align-items: center; justify-content: center; }
.benefit-icon img { width: 100%; height: 100%; object-fit: contain; }
.benefit-card h4 { font-size: 1rem; font-weight: 700; color: var(--primary); line-height: 1.4; }

/* ==================== FAQ (2-column layout) ==================== */
.faq-section { padding: 70px 0; background: var(--bg-white); }
.faq-section > .container > h2 { text-align: center; font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 40px; }
.faq-layout { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 50px; align-items: start; }
.faq-left { text-align: center; position: sticky; top: 30px; }
.faq-bottle-wrap { position: relative; max-width: 320px; margin: 0 auto 28px; }
.faq-bottle-wrap .bottle { width: 100%; filter: drop-shadow(0 16px 30px rgba(24, 16, 66, .25)); }
.faq-seal { position: absolute; top: 10%; right: -10px; width: 110px; filter: drop-shadow(0 6px 12px rgba(0, 0, 0, .15)); }
.faq-cta { display: inline-flex; align-items: center; gap: 8px; padding: 16px 32px; background: var(--green); color: #fff; font-size: 1.05rem; font-weight: 700; text-decoration: none; border-radius: 10px; transition: background .3s; letter-spacing: .5px; animation: pulse 2.5s infinite; }
.faq-cta:hover { background: var(--green-hover); }
.faq-cta-arrow { display: inline-block; transition: transform .3s; }
.faq-cta:hover .faq-cta-arrow { transform: translateX(4px); }

.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-white); transition: border-color .3s ease; }
.faq-item:hover { border-color: var(--accent); }
.faq-item.active { border-color: var(--accent); }
.faq-question { display: flex; justify-content: space-between; align-items: center; width: 100%; padding: 18px 22px; background: none; border: none; font-size: 1rem; font-weight: 600; color: var(--primary); cursor: pointer; text-align: left; font-family: inherit; }
.faq-question:hover { background: var(--bg-light); }
.faq-toggle { font-size: 1.4rem; font-weight: 300; color: var(--text-gray); transition: transform .3s; flex-shrink: 0; margin-left: 12px; }
.faq-item.active .faq-toggle { transform: rotate(45deg); color: var(--accent); }
.faq-answer { display: none; padding: 0 22px 20px; font-size: .95rem; line-height: 1.75; color: var(--text-gray); }
.faq-item.active .faq-answer { display: block; }

/* ==================== SUPPLEMENT FACTS / LABEL ==================== */
.label-section { padding: 50px 0; background: var(--bg-light); }
.label-image-wrap { max-width: 1140px; margin: 0 auto; padding: 0 20px; }
.label-image-wrap img { width: 100%; height: auto; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }

/* ==================== SCIENTIFIC REFERENCES ==================== */
.scientific-references { padding: 60px 0 50px; background: var(--bg-white); }
.scientific-references__label { text-align: center; font-size: .85rem; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--text-light); margin-bottom: 28px; }
.scientific-references__logos { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; align-items: center; max-width: 880px; margin: 0 auto 18px; padding: 0 20px; }
.scientific-references__logos > * { display: flex; align-items: center; justify-content: center; min-height: 60px; }
.scientific-references__logos img { max-height: 50px; max-width: 180px; width: auto; height: auto; object-fit: contain; opacity: .85; filter: grayscale(15%); }
.scientific-references__disclaimer { text-align: center; font-size: .78rem; color: var(--text-light); font-style: italic; max-width: 760px; margin: 0 auto 40px; padding: 0 20px; }
.scientific-references__cols { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px 40px; max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.scientific-references__cols p { font-size: .8rem; color: var(--text-gray); line-height: 1.6; margin-bottom: 12px; }
.scientific-references__cols i { font-style: italic; color: var(--text-dark); }
.scientific-references__cols b { font-weight: 700; color: var(--primary); }

/* ==================== FOOTER ==================== */
.footer { background: #0f172a; color: rgba(255, 255, 255, .7); padding: 40px 0 20px; }
.footer-links { display: flex; justify-content: center; gap: 24px; flex-wrap: wrap; margin-bottom: 24px; }
.footer-links a { color: rgba(255, 255, 255, .7); text-decoration: none; font-size: .9rem; transition: color .3s; }
.footer-links a:hover { color: #fff; }
.footer-disclaimer { font-size: .75rem; line-height: 1.5; text-align: justify; max-width: 900px; margin: 0 auto 20px; color: rgba(255, 255, 255, .5); }
.footer-bg-disclaimer { background: #000; padding: 16px; border-radius: 8px; margin-bottom: 20px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; justify-content: center; max-width: 900px; margin-left: auto; margin-right: auto; }
.footer-bg-disclaimer img { max-width: 150px; }
.footer-bg-disclaimer p { font-size: .7rem; line-height: 1.4; color: #aaa; text-align: justify; flex: 1; min-width: 250px; }
.footer-copy { text-align: center; font-size: .8rem; color: rgba(255, 255, 255, .4); margin-top: 16px; }

/* ==================== RESPONSIVE ==================== */
@media (max-width: 992px) {
    .pricing-grid { grid-template-columns: 1fr; max-width: 400px; margin: 0 auto; }
    .pricing-card.featured { transform: scale(1); }
    .pricing-card.featured:hover { transform: translateY(-8px); }
    .guarantee-content { flex-direction: column; text-align: center; }
    .guarantee-badge { width: 120px; }
    .bonuses-grid { grid-template-columns: 1fr; }

    .about-header h2 { font-size: 1.7rem; }
    .about-block, .about-block--media-left { grid-template-columns: 1fr; gap: 30px; }
    .about-block--media-left .about-block__media { order: 0; }
    .about-block__media img { max-width: 280px; }

    .product-intro-content { grid-template-columns: 1fr; gap: 36px; text-align: center; }
    .product-intro-bottle { order: -1; }
    .product-intro-name { font-size: 2.4rem; }
    .product-intro-bottle .bottle { max-width: 280px; }
    .product-intro-seal { width: 100px; left: 5%; }

    .ingredients-grid { grid-template-columns: repeat(2, 1fr); }
    .scientific-references__logos { grid-template-columns: repeat(2, 1fr); gap: 18px; }

    .faq-layout { grid-template-columns: 1fr; gap: 36px; }
    .faq-left { position: static; }
    .faq-bottle-wrap { max-width: 240px; }
    .faq-seal { width: 90px; }
}
@media (max-width: 768px) {
    .claim-strip h2 { font-size: 1.4rem; }
    .pricing-section .section-title { font-size: 1.5rem; }
    .shipping-content { flex-direction: column; text-align: center; }

    .about-header { padding: 44px 0; }
    .about-header h2 { font-size: 1.4rem; }
    .about-subtitle { font-size: .95rem; }
    .about-content { padding: 50px 0; }
    .about-block__body h3 { font-size: 1.35rem; }

    .product-intro-section { padding: 50px 0; }
    .product-intro-name { font-size: 2rem; }

    .ingredients-header h2 { font-size: 1.5rem; }
    .ingredients-grid { grid-template-columns: 1fr; max-width: 320px; }
    .ing-circle { width: 130px; height: 130px; }

    .benefits-section h2 { font-size: 1.5rem; }
    .benefits-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 20px; }
    .benefit-icon { width: 64px; height: 64px; }
    .benefit-card h4 { font-size: .92rem; }

    .faq-section > .container > h2 { font-size: 1.5rem; }
    .scientific-references__cols { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 480px) {
    .about-header h2 { font-size: 1.2rem; }
    .product-intro-name { font-size: 1.7rem; }
    .ingredients-header h2 { font-size: 1.3rem; }
    .benefits-section h2 { font-size: 1.3rem; }
}