:root {
    --primary: #10b981;
    --primary-hover: #059669;
    --primary-light: #ecfdf5;
    --dark: #111827;
    --text: #374151;
    --muted: #6b7280;
    --bg: #ffffff;
    --bg-alt: #f9fafb;
    --border: #e5e7eb;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.6; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 20px; }
.full { width: 100%; }

/* Шапка */
.header { position: fixed; top: 0; left: 0; width: 100%; background: rgba(255,255,255,0.95); border-bottom: 1px solid var(--border); z-index: 100; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { font-size: 22px; font-weight: 700; color: var(--dark); text-decoration: none; }
.logo span { color: var(--primary); }
.nav-links { display: flex; gap: 28px; }
.nav-links a { text-decoration: none; color: var(--text); font-size: 15px; font-weight: 500; }
.nav-links a:hover { color: var(--primary); }

/* Кнопки */
.btn { display: inline-flex; align-items: center; justify-content: center; background: var(--primary); color: #fff; font-size: 15px; font-weight: 600; padding: 14px 28px; border-radius: 12px; border: none; text-decoration: none; cursor: pointer; transition: 0.2s; }
.btn:hover { background: var(--primary-hover); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-outline { background: transparent; color: var(--dark); border: 1px solid var(--border); }
.btn-outline:hover { background: var(--bg-alt); }

/* Главный экран */
.hero { padding: 135px 0 85px; background: radial-gradient(circle at top right, var(--primary-light), transparent 60%); }
.hero-wrap { display: grid; grid-template-columns: 1.2fr 0.8fr; align-items: center; gap: 48px; }
.badge-pill { display: inline-block; background: var(--primary-light); color: var(--primary-hover); font-size: 13px; font-weight: 600; padding: 6px 14px; border-radius: 99px; margin-bottom: 18px; }
.hero h1 { font-size: 42px; font-weight: 700; color: var(--dark); line-height: 1.15; margin-bottom: 18px; }
.hero p { font-size: 17px; color: var(--muted); margin-bottom: 30px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* Обложка книги */
.book-showcase { display: flex; justify-content: center; }
.book-cover { width: 280px; height: 370px; background: linear-gradient(145deg, #065f46 0%, #10b981 100%); border-radius: 8px 20px 20px 8px; padding: 32px 26px; color: #fff; display: flex; flex-direction: column; justify-content: space-between; box-shadow: -12px 18px 35px rgba(6, 95, 70, 0.25); border-left: 10px solid #047857; }
.book-tag { font-size: 11px; font-weight: 700; letter-spacing: 1px; background: rgba(255,255,255,0.2); padding: 5px 10px; border-radius: 6px; align-self: flex-start; }
.book-cover h3 { font-size: 28px; line-height: 1.15; letter-spacing: 0.5px; }
.book-cover p { font-size: 15px; color: #d1fae5; margin: 0; }
.book-meta { font-size: 12px; border-top: 1px solid rgba(255,255,255,0.25); padding-top: 14px; color: #ecfdf5; }

/* Блок истории */
.story-card { background: #fff; border: 1px solid var(--border); border-radius: 24px; padding: 40px; display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 40px; align-items: center; }
.story-numbers { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 14px; background: var(--bg-alt); padding: 28px; border-radius: 18px; }
.num-item { text-align: center; padding: 10px; }
.num-item strong { display: block; font-size: 28px; color: var(--dark); line-height: 1.1; }
.num-item.accent strong { color: var(--primary); }
.num-item span { font-size: 13px; color: var(--muted); }
.num-arrow { font-size: 24px; color: var(--primary); font-weight: 700; }
.story-text h2 { font-size: 28px; color: var(--dark); margin-bottom: 14px; }
.story-text p { color: var(--text); font-size: 15px; margin-bottom: 12px; }

/* Секции и карточки */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 580px; margin: 0 auto 48px; }
.section-head h2 { font-size: 32px; color: var(--dark); margin-bottom: 10px; }
.section-head p { color: var(--muted); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; max-width: 880px; margin: 0 auto; }

.card { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 30px; }
.icon-box { width: 46px; height: 46px; background: var(--primary-light); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 18px; }
.card h3 { font-size: 18px; color: var(--dark); margin-bottom: 8px; }
.card p { font-size: 15px; color: var(--muted); }

/* Калькулятор */
.calc-wrapper { max-width: 480px; margin: 0 auto; background: #fff; border: 1px solid var(--border); border-radius: 20px; padding: 32px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 14px; font-weight: 500; color: var(--dark); margin-bottom: 6px; }
.input { width: 100%; padding: 12px 14px; font-size: 15px; font-family: inherit; border: 1px solid var(--border); border-radius: 10px; outline: none; }
.input:focus { border-color: var(--primary); }
.bmi-output { display: none; margin-top: 18px; padding: 16px; border-radius: 12px; background: var(--primary-light); color: var(--dark); font-size: 15px; }

/* Тарифы */
.price-card { background: #fff; border: 1px solid var(--border); border-radius: 20px; padding: 36px 30px; display: flex; flex-direction: column; position: relative; }
.price-card.featured { border: 2px solid var(--primary); box-shadow: 0 20px 35px -15px rgba(16, 185, 129, 0.18); }
.popular-tag { position: absolute; top: -13px; right: 24px; background: var(--primary); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 99px; }
.price-title { font-size: 21px; font-weight: 700; color: var(--dark); }
.price-desc { font-size: 14px; color: var(--muted); margin-top: 4px; }
.price-value { font-size: 38px; font-weight: 700; color: var(--dark); margin: 16px 0 22px; }
.price-features { list-style: none; margin-bottom: 30px; flex-grow: 1; }
.price-features li { font-size: 15px; padding-left: 24px; position: relative; margin-bottom: 12px; }
.price-features li::before { content: "✓"; position: absolute; left: 0; color: var(--primary); font-weight: 700; }

/* Подвал */
.footer { border-top: 1px solid var(--border); padding: 30px 0; text-align: center; font-size: 14px; color: var(--muted); }

/* Модальное окно */
.modal { display: none; position: fixed; inset: 0; background: rgba(17,24,39,0.6); z-index: 200; align-items: center; justify-content: center; padding: 16px; }
.modal.open { display: flex; }
.modal-dialog { background: #fff; width: 100%; max-width: 430px; border-radius: 20px; padding: 32px; position: relative; }
.modal-close { position: absolute; top: 18px; right: 20px; background: none; border: none; font-size: 24px; color: var(--muted); cursor: pointer; }
.order-info { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; display: flex; justify-content: space-between; align-items: center; margin: 16px 0 20px; }
.price-accent { font-size: 20px; color: var(--primary); }
.pay-tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 18px; }
.pay-tab { padding: 10px 6px; border: 1px solid var(--border); border-radius: 10px; background: #fff; font-size: 13px; font-weight: 600; cursor: pointer; }
.pay-tab.active { border-color: var(--primary); background: var(--primary-light); color: var(--primary-hover); }
.row-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.info-banner { display: none; background: var(--bg-alt); border-radius: 10px; padding: 14px; font-size: 14px; margin-bottom: 18px; text-align: center; }
.success-icon { width: 56px; height: 56px; background: var(--primary-light); color: var(--primary); font-size: 28px; font-weight: 700; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.muted-text { color: var(--muted); font-size: 14px; margin: 10px 0 24px; }

@media (max-width: 820px) {
    .hero-wrap, .story-card, .grid-3, .grid-2 { grid-template-columns: 1fr; }
    .hero h1 { font-size: 32px; }
    .nav-links { display: none; }
}