/* ========================================
   PROSTONEL - Styles
   Color scheme: Blue (#1565C0 / #0D47A1)
   ======================================== */

:root {
    --color-primary: #1565C0;
    --color-primary-dark: #0D47A1;
    --color-primary-light: #1E88E5;
    --color-secondary: #00ACC1;
    --color-secondary-dark: #00838F;
    --color-accent: #26C6DA;
    --color-success: #43A047;
    --color-warning: #FFA726;
    --color-danger: #EF5350;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-white: #ffffff;
    --color-light: #f5f7fa;
    --color-border: #e0e0e0;
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-secondary); font-size: 16px; line-height: 1.7; color: var(--color-text); background: var(--color-white); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-primary); font-weight: 700; line-height: 1.3; color: var(--color-text); }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }
img { max-width: 100%; height: auto; }

.btn { display: inline-block; padding: 14px 32px; font-family: var(--font-primary); font-size: 1rem; font-weight: 600; text-align: center; border: none; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition); text-decoration: none; }
.btn--primary { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); color: var(--color-white); box-shadow: 0 4px 15px rgba(21, 101, 192, 0.35); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(21, 101, 192, 0.45); color: var(--color-white); }
.btn--secondary { background: var(--color-white); color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn--secondary:hover { background: var(--color-primary); color: var(--color-white); }
.btn--large { padding: 18px 40px; font-size: 1.1rem; }

.header { position: fixed; top: 0; left: 0; right: 0; background: var(--color-white); box-shadow: var(--shadow-sm); z-index: 1000; padding: 15px 0; }
.header__inner { display: flex; align-items: center; justify-content: space-between; }
.logo { display: flex; align-items: center; gap: 8px; font-family: var(--font-primary); font-size: 1.5rem; font-weight: 800; color: var(--color-primary); }
.logo:hover { color: var(--color-primary); }
.logo__icon { font-size: 1.8rem; }
.nav__list { display: flex; list-style: none; gap: 30px; align-items: center; }
.nav__link { font-family: var(--font-primary); font-weight: 500; color: var(--color-text); padding: 8px 0; position: relative; }
.nav__link:hover { color: var(--color-primary); }
.nav__link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--color-primary); transition: var(--transition); }
.nav__link:hover::after { width: 100%; }
.nav__link--cta { background: var(--color-primary); color: var(--color-white) !important; padding: 10px 24px; border-radius: var(--radius-sm); }
.nav__link--cta:hover { background: var(--color-primary-dark); }
.nav__link--cta::after { display: none; }
.burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 5px; }
.burger span { width: 25px; height: 3px; background: var(--color-primary); border-radius: 2px; transition: var(--transition); }

.hero { padding: 140px 0 80px; background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%); }
.hero__inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero__badge { display: inline-block; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%); color: var(--color-white); padding: 8px 20px; border-radius: 50px; font-size: 0.9rem; font-weight: 600; margin-bottom: 20px; }
.hero__title { font-size: 2.8rem; margin-bottom: 20px; color: var(--color-text); }
.hero__title span { display: block; color: var(--color-primary); font-size: 1.8rem; margin-top: 10px; }
.hero__subtitle { font-size: 1.1rem; color: var(--color-text-light); margin-bottom: 25px; line-height: 1.8; }
.hero__benefits { list-style: none; margin-bottom: 30px; }
.hero__benefits li { padding: 8px 0; font-size: 1.05rem; color: var(--color-text); }
.hero__price-box { background: var(--color-white); padding: 20px 25px; border-radius: var(--radius-md); box-shadow: var(--shadow-md); margin-bottom: 25px; display: inline-block; }
.price-old { font-size: 1.1rem; color: var(--color-text-muted); text-decoration: line-through; }
.price-new { font-size: 2.5rem; font-weight: 800; color: var(--color-primary); font-family: var(--font-primary); margin: 0 15px; }
.price-discount { display: inline-block; background: var(--color-danger); color: var(--color-white); padding: 5px 12px; border-radius: 4px; font-size: 0.9rem; font-weight: 700; }
.hero__urgency { margin-top: 20px; padding: 12px 20px; background: #FFF3E0; border-left: 4px solid var(--color-warning); border-radius: var(--radius-sm); font-size: 0.95rem; }
.hero__image { text-align: center; }
.hero__img { max-width: 400px; margin: 0 auto; filter: drop-shadow(0 20px 40px rgba(21, 101, 192, 0.25)); }

.trust-bar { background: var(--color-primary); padding: 20px 0; }
.trust-bar__inner { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 20px; }
.trust-item { display: flex; align-items: center; gap: 10px; color: var(--color-white); }
.trust-item__icon { font-size: 1.5rem; }
.trust-item__text { font-weight: 500; }

.section { padding: 80px 0; }
.section--light { background: var(--color-light); }
.section--dark { background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%); }
.section__title { font-size: 2.2rem; text-align: center; margin-bottom: 20px; }
.section__title--light { color: var(--color-white); }
.section__intro { text-align: center; max-width: 800px; margin: 0 auto 50px; color: var(--color-text-light); font-size: 1.1rem; }
.section__text { font-size: 1.05rem; line-height: 1.8; margin-bottom: 20px; }

.problem-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 50px; align-items: center; margin-top: 40px; }
.problem-symptoms { background: var(--color-white); padding: 30px; border-radius: var(--radius-md); margin-top: 25px; box-shadow: var(--shadow-sm); }
.problem-symptoms h3 { margin-bottom: 20px; color: var(--color-primary); }
.symptoms-list { list-style: none; }
.symptoms-list li { padding: 10px 0; display: flex; align-items: center; gap: 12px; font-size: 1.05rem; }
.symptom-marker { font-size: 1.2rem; }
.section-img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); max-width: 350px; }

.benefits-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin: 50px 0; }
.benefit-card { background: var(--color-white); padding: 30px; border-radius: var(--radius-md); text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--color-border); }
.benefit-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.benefit-card__icon { font-size: 2.5rem; margin-bottom: 15px; }
.benefit-card h4 { font-size: 1.1rem; margin-bottom: 10px; color: var(--color-primary); }
.benefit-card p { font-size: 0.95rem; color: var(--color-text-light); }
.cta-box { text-align: center; margin-top: 40px; }

.section--banner { background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%); padding: 60px 0; }
.banner-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.banner-img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; }
.banner-content h3 { font-size: 1.8rem; margin-bottom: 20px; color: var(--color-primary-dark); }
.banner-content p { font-size: 1.1rem; margin-bottom: 25px; color: var(--color-text); }

.ingredients-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin: 40px 0; }
.ingredient-card { background: var(--color-white); padding: 30px; border-radius: var(--radius-md); text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition); }
.ingredient-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.ingredient-card__icon { font-size: 2.5rem; margin-bottom: 15px; }
.ingredient-card h4 { font-size: 1.1rem; margin-bottom: 5px; color: var(--color-primary); }
.ingredient-latin { font-style: italic; color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 15px; }
.ingredient-card p:last-child { font-size: 0.95rem; color: var(--color-text-light); }
.composition-note { text-align: center; padding: 20px; background: var(--color-white); border-radius: var(--radius-md); margin-top: 30px; }
.composition-note p { font-size: 0.95rem; color: var(--color-text); }
.composition-table { background: var(--color-white); padding: 30px; border-radius: var(--radius-md); margin-top: 40px; box-shadow: var(--shadow-sm); }
.composition-table h3 { text-align: center; margin-bottom: 20px; color: var(--color-primary); font-size: 1.3rem; }
.ingredients-table { width: 100%; border-collapse: collapse; margin-bottom: 15px; }
.ingredients-table th, .ingredients-table td { padding: 12px 15px; text-align: left; border-bottom: 1px solid var(--color-border); }
.ingredients-table th { background: var(--color-primary); color: var(--color-white); font-weight: 600; }
.ingredients-table tr:hover { background: var(--color-light); }
.ingredients-table td:nth-child(2), .ingredients-table td:nth-child(3) { text-align: center; }
.ingredients-table th:nth-child(2), .ingredients-table th:nth-child(3) { text-align: center; }
.table-note { font-size: 0.85rem; color: var(--color-text-muted); text-align: center; margin: 0; }

.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; margin: 40px 0; }
.step-card { background: var(--color-white); padding: 30px 20px; border-radius: var(--radius-md); text-align: center; box-shadow: var(--shadow-sm); }
.step-number { width: 50px; height: 50px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); color: var(--color-white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: 700; margin: 0 auto 20px; font-family: var(--font-primary); }
.step-card h4 { font-size: 1.1rem; margin-bottom: 10px; color: var(--color-primary); }
.step-card p { font-size: 0.95rem; color: var(--color-text-light); }
.usage-tip { background: #E3F2FD; padding: 20px 25px; border-radius: var(--radius-md); border-left: 4px solid var(--color-primary); margin-top: 30px; }
.usage-tip p { margin: 0; font-size: 1rem; }

.where-buy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin: 40px 0; }
.where-buy-card { padding: 30px; border-radius: var(--radius-md); text-align: center; transition: var(--transition); }
.where-buy-card--no { background: #FFEBEE; border: 2px solid #EF9A9A; }
.where-buy-card--warning { background: #FFF8E1; border: 2px solid #FFCC80; }
.where-buy-card--yes { background: #E8F5E9; border: 2px solid #81C784; }
.where-buy-icon { font-size: 3rem; margin-bottom: 15px; }
.where-buy-card h4 { font-size: 1.2rem; margin-bottom: 15px; }
.where-buy-card p { font-size: 0.95rem; color: var(--color-text); }
.buy-explanation { background: var(--color-white); padding: 30px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); margin-top: 30px; }
.buy-explanation h3 { margin-bottom: 20px; color: var(--color-primary); }
.buy-reasons { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
.buy-reasons li { font-size: 1rem; }

.price-box { background: var(--color-white); padding: 40px; border-radius: var(--radius-lg); text-align: center; max-width: 700px; margin: 40px auto 0; box-shadow: var(--shadow-lg); }
.price-box__badge { display: inline-block; background: var(--color-warning); color: var(--color-text); padding: 10px 20px; border-radius: 50px; font-size: 0.9rem; font-weight: 700; margin-bottom: 25px; }
.price-box__product { margin-bottom: 20px; }
.price-product-img { max-width: 350px; }
.price-box__info h3 { font-size: 1.5rem; margin-bottom: 5px; }
.price-duration { color: var(--color-text-light); font-size: 0.95rem; margin-bottom: 20px; }
.price-box__old { font-size: 1.1rem; color: var(--color-text-muted); }
.price-box__new { font-size: 3rem; font-weight: 800; color: var(--color-primary); font-family: var(--font-primary); margin: 10px 0; }
.price-box__save { color: var(--color-success); font-weight: 600; margin-bottom: 25px; }
.price-box__features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; margin: 25px 0; text-align: left; }
.price-feature { font-size: 0.95rem; padding: 10px 15px; background: var(--color-light); border-radius: var(--radius-sm); }

.reviews-stats { display: grid; grid-template-columns: auto 1fr; gap: 50px; align-items: center; max-width: 700px; margin: 0 auto 50px; background: var(--color-white); padding: 30px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
.reviews-rating { text-align: center; }
.rating-number { display: block; font-size: 3.5rem; font-weight: 800; color: var(--color-primary); font-family: var(--font-primary); line-height: 1; }
.rating-stars { display: block; font-size: 1.5rem; color: #FFC107; margin: 10px 0; }
.rating-count { font-size: 0.9rem; color: var(--color-text-light); }
.rating-bars { display: flex; flex-direction: column; gap: 8px; }
.rating-bar { display: flex; align-items: center; gap: 10px; font-size: 0.9rem; }
.rating-bar .bar { flex: 1; height: 8px; background: var(--color-border); border-radius: 4px; overflow: hidden; }
.rating-bar .bar-fill { height: 100%; background: linear-gradient(90deg, var(--color-primary) 0%, var(--color-primary-light) 100%); border-radius: 4px; }
.reviews-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 25px; }
.review-card { background: var(--color-white); padding: 25px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--color-border); }
.review-card__header { display: flex; align-items: center; gap: 15px; margin-bottom: 15px; }
.review-card__avatar { width: 50px; height: 50px; background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%); color: var(--color-white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 700; }
.review-card__info { flex: 1; }
.review-card__name { display: block; font-weight: 600; color: var(--color-text); }
.review-card__location { font-size: 0.9rem; color: var(--color-text-muted); }
.review-card__rating { color: #FFC107; font-size: 1.1rem; }
.review-card__verified { display: inline-block; background: #E3F2FD; color: var(--color-primary); padding: 4px 12px; border-radius: 4px; font-size: 0.85rem; margin-bottom: 15px; }
.review-card__text { font-size: 0.95rem; line-height: 1.7; color: var(--color-text); font-style: italic; margin-bottom: 15px; }
.review-card__date { font-size: 0.85rem; color: var(--color-text-muted); }
.reviews-note { background: #E3F2FD; padding: 20px; border-radius: var(--radius-md); margin-top: 40px; border-left: 4px solid var(--color-primary); }
.reviews-note p { margin: 0; font-size: 0.95rem; }

.safety-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; margin: 40px 0; }
.safety-card { padding: 30px; border-radius: var(--radius-md); }
.safety-card--safe { background: #E8F5E9; border: 2px solid #81C784; }
.safety-card--warning { background: #FFF8E1; border: 2px solid #FFCC80; }
.safety-icon { font-size: 2.5rem; margin-bottom: 15px; }
.safety-card h4 { font-size: 1.2rem; margin-bottom: 20px; }
.safety-card ul { list-style: none; }
.safety-card li { padding: 8px 0; font-size: 0.95rem; }
.safety-disclaimer { background: var(--color-white); padding: 25px; border-radius: var(--radius-md); border-left: 4px solid var(--color-primary); }
.safety-disclaimer p { margin: 0; font-size: 0.95rem; }

.faq-accordion { max-width: 900px; margin: 40px auto 0; }
.faq-item { background: var(--color-white); border-radius: var(--radius-md); margin-bottom: 15px; box-shadow: var(--shadow-sm); overflow: hidden; }
.faq-question { width: 100%; padding: 20px 25px; background: none; border: none; text-align: left; font-family: var(--font-primary); font-size: 1.05rem; font-weight: 600; color: var(--color-text); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
.faq-question:hover { color: var(--color-primary); }
.faq-icon { font-size: 1.5rem; color: var(--color-primary); transition: var(--transition); }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-item.active .faq-answer { max-height: 500px; }
.faq-answer p { padding: 0 25px 20px; font-size: 1rem; line-height: 1.8; color: var(--color-text-light); }

.section--order { background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%); padding: 80px 0; }
.order-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: start; }
.order-product { background: var(--color-white); padding: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); text-align: center; }
.order-product-img { max-width: 250px; margin-bottom: 20px; }
.order-product-info h3 { font-size: 1.5rem; margin-bottom: 15px; }
.order-price { margin-bottom: 20px; }
.order-price-old { font-size: 1.1rem; color: var(--color-text-muted); text-decoration: line-through; margin-right: 10px; }
.order-price-new { font-size: 2rem; font-weight: 800; color: var(--color-primary); }
.order-benefits { list-style: none; text-align: left; }
.order-benefits li { padding: 8px 0; font-size: 0.95rem; }
.order-form-container { background: var(--color-white); padding: 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); }
.order-form-header { text-align: center; margin-bottom: 25px; }
.order-form-header h3 { font-size: 1.3rem; margin-bottom: 5px; }
.order-form-header p { color: var(--color-text-light); font-size: 0.95rem; }
.order-iframe-container { min-height: 400px; }
.order-iframe { width: 100%; min-height: 400px; border: none; }

.footer { background: var(--color-text); color: var(--color-white); padding: 40px 0; }
.footer__inner { text-align: center; }
.footer__disclaimer { max-width: 800px; margin: 0 auto 25px; padding: 20px; background: rgba(255,255,255,0.1); border-radius: var(--radius-md); }
.footer__disclaimer p { font-size: 0.85rem; line-height: 1.7; margin: 0; }
.footer__links { margin-bottom: 20px; }
.footer__links a { color: var(--color-white); margin: 0 15px; font-size: 0.95rem; opacity: 0.8; }
.footer__links a:hover { opacity: 1; }
.footer__copy p { font-size: 0.9rem; opacity: 0.7; margin: 0; }

.back-to-top { position: fixed; bottom: 30px; right: 30px; width: 50px; height: 50px; background: var(--color-primary); color: var(--color-white); border: none; border-radius: 50%; font-size: 1.5rem; cursor: pointer; opacity: 0; visibility: hidden; transition: var(--transition); box-shadow: var(--shadow-md); z-index: 999; }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--color-primary-dark); transform: translateY(-3px); }

@media (max-width: 1024px) {
    .hero__inner { grid-template-columns: 1fr; text-align: center; }
    .hero__benefits { display: inline-block; text-align: left; }
    .hero__image { order: -1; }
    .hero__img { max-width: 350px; }
    .problem-grid, .banner-grid { grid-template-columns: 1fr; }
    .problem-image, .banner-image { order: -1; text-align: center; }
    .benefits-grid, .ingredients-grid, .where-buy-grid { grid-template-columns: repeat(2, 1fr); }
    .steps-grid { grid-template-columns: repeat(2, 1fr); }
    .order-grid { grid-template-columns: 1fr; }
    .buy-reasons { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav { position: fixed; top: 70px; left: 0; right: 0; background: var(--color-white); padding: 20px; box-shadow: var(--shadow-md); transform: translateY(-150%); opacity: 0; transition: var(--transition); }
    .nav.active { transform: translateY(0); opacity: 1; }
    .nav__list { flex-direction: column; gap: 15px; }
    .burger { display: flex; }
    .burger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .burger.active span:nth-child(2) { opacity: 0; }
    .burger.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }
    .hero { padding: 100px 0 60px; }
    .hero__title { font-size: 2rem; }
    .hero__title span { font-size: 1.4rem; }
    .section__title { font-size: 1.7rem; }
    .benefits-grid, .ingredients-grid, .where-buy-grid, .safety-grid { grid-template-columns: 1fr; }
    .steps-grid { grid-template-columns: 1fr; }
    .reviews-stats { grid-template-columns: 1fr; text-align: center; }
    .reviews-grid { grid-template-columns: 1fr; }
    .price-box__features { grid-template-columns: 1fr; }
    .trust-bar__inner { flex-direction: column; gap: 15px; text-align: center; }
    .price-new { font-size: 2rem; }
    .price-box__new { font-size: 2.5rem; }
}

@media (max-width: 480px) {
    .container { padding: 0 15px; }
    .hero__title { font-size: 1.7rem; }
    .hero__title span { font-size: 1.2rem; }
    .hero__price-box { padding: 15px; }
    .section { padding: 60px 0; }
    .section__title { font-size: 1.5rem; }
    .btn--large { padding: 15px 30px; font-size: 1rem; }
    .benefit-card, .ingredient-card, .step-card, .review-card { padding: 20px; }
    .faq-question { padding: 15px 20px; font-size: 0.95rem; }
    .faq-answer p { padding: 0 20px 15px; }
    .order-product, .order-form-container { padding: 20px; }
    .price-box { padding: 25px 20px; }
    .back-to-top { bottom: 20px; right: 20px; width: 45px; height: 45px; }
}