:root {
    --color-primary: #0a84ff;
    --color-primary-dark: #0066d6;
    --color-accent: #10b981; /* Более современный изумрудный */
    --color-accent-dark: #059669;
    --color-text-main: #0f172a; /* Глубокий сланцевый */
    --color-text-secondary: #475569;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-surface-soft: #f1f5f9;
    --color-line: #e2e8f0;
    --color-line-strong: #cbd5e1;
    --color-danger: #ef4444;
    
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(16, 185, 129, 0.2);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 999px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--color-text-main);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--color-primary-dark); }

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

h1, h2, h3 {
    font-family: 'Manrope', sans-serif;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin: 0 0 1rem;
    color: var(--color-text-main);
}

h1 { font-size: clamp(2rem, 4vw, 3.2rem); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 800; }
h3 { font-size: 1.2rem; font-weight: 700; }

/* NAVBAR */
.navbar {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-line);
}
.navbar-inner {
    height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.logo { font-family: 'Manrope', sans-serif; font-size: 1.3rem; font-weight: 800; color: var(--color-primary); }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-link { color: var(--color-text-main); font-weight: 600; font-size: 0.95rem; }

/* BUTTONS */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    border: none; border-radius: var(--radius-md); cursor: pointer;
    text-decoration: none; font-weight: 700; transition: var(--transition);
    text-align: center; line-height: 1.2;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn-sm { padding: 0.7rem 1.2rem; font-size: 0.9rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 1.1rem 1.8rem; font-size: 1.05rem; }
.btn-block { width: 100%; }

.btn-primary {
    background: var(--color-primary); color: #fff;
    box-shadow: 0 4px 12px rgba(10,132,255,0.25);
}
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; box-shadow: 0 6px 16px rgba(10,132,255,0.3); }

.btn-success {
    background: var(--color-accent); color: #fff;
    box-shadow: 0 4px 12px rgba(16,185,129,0.25), var(--shadow-glow);
}
.btn-success:hover { background: var(--color-accent-dark); color: #fff; box-shadow: 0 6px 16px rgba(16,185,129,0.3), var(--shadow-glow); }

.btn-outline {
    background: transparent; color: var(--color-primary);
    border: 2px solid var(--color-primary);
}
.btn-outline:hover { background: var(--color-primary-light); color: var(--color-primary-dark); border-color: var(--color-primary-dark); }

.btn-ghost {
    background: var(--color-surface); color: var(--color-text-main);
    border: 1px solid var(--color-line-strong);
}
.btn-ghost:hover { background: var(--color-surface-soft); border-color: var(--color-text-secondary); }

/* HERO */
.hero { padding: 4rem 0 5rem; background: linear-gradient(180deg, #ffffff 0%, var(--color-bg) 100%); }
.hero-inner { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3rem; align-items: center; }

.breadcrumbs { display: flex; gap: 0.5rem; flex-wrap: wrap; color: var(--color-text-secondary); font-size: 0.85rem; margin-bottom: 1.5rem; }
.breadcrumbs a { color: var(--color-text-secondary); text-decoration: underline; text-decoration-color: var(--color-line-strong); }
.breadcrumbs a:hover { color: var(--color-primary); text-decoration-color: var(--color-primary); }

.hero-badge {
    display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.4rem 1rem;
    border-radius: var(--radius-pill); font-size: 0.8rem; font-weight: 700;
    text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 1rem;
    background: #eff6ff; color: var(--color-primary); border: 1px solid #bfdbfe;
}

.hero-text { color: var(--color-text-secondary); font-size: 1.1rem; margin-bottom: 2rem; max-width: 600px; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 0.8rem; margin-bottom: 2.5rem; }
.hero-meta span {
    display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.5rem 0.8rem;
    border-radius: var(--radius-sm); background: var(--color-surface);
    border: 1px solid var(--color-line); font-size: 0.9rem; font-weight: 600; color: var(--color-text-secondary);
}
.hero-meta i { color: var(--color-primary); }

.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-top: 1.5rem; font-size: 0.85rem; color: var(--color-text-secondary); font-weight: 500; }
.hero-trust span { display: flex; align-items: center; gap: 0.4rem; }
.hero-trust i { color: var(--color-accent); font-size: 1rem; }

/* TRIAL CARD (SIDE) */
.trial-card {
    padding: 2.5rem 2rem; background: var(--color-surface); border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); border: 1px solid var(--color-line); position: relative;
}
.trial-card::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 6px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.trial-card h3 { font-size: 1.4rem; margin-bottom: 1rem; }
.trial-card p { color: var(--color-text-secondary); font-size: 0.95rem; margin-bottom: 1.5rem; }
.trial-list { list-style: none; padding: 0; margin: 0 0 2rem; }
.trial-list li { display: flex; align-items: flex-start; gap: 0.75rem; margin-bottom: 0.75rem; font-size: 0.95rem; font-weight: 500; }
.trial-list i { color: var(--color-accent); font-size: 1.1rem; }

/* CONTENT SHELL & TOC */
.main-content { padding-bottom: 5rem; }
.content-shell {
    background: var(--color-surface); border-radius: var(--radius-lg);
    padding: 3rem; box-shadow: var(--shadow-md); border: 1px solid var(--color-line);
    margin-bottom: 3rem;
}
.toc-box {
    background: var(--color-surface-soft); padding: 1.5rem; border-radius: var(--radius-md);
    margin-bottom: 2.5rem; border-left: 4px solid var(--color-primary);
}
.toc-title { font-weight: 800; margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem; font-size: 1.1rem; }
.toc-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 0.75rem; list-style: none; padding: 0; margin: 0; }
.toc-list a { color: var(--color-text-secondary); font-weight: 500; }
.toc-list a:hover { color: var(--color-primary); }

.content-body { font-size: 1.05rem; color: #334155; }
.content-body h2 { margin-top: 2.5rem; color: var(--color-text-main); font-size: 1.8rem; border-bottom: 1px solid var(--color-line); padding-bottom: 0.5rem; }
.content-body ul, .content-body ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
.content-body li { margin-bottom: 0.5rem; }

/* BENEFITS & WORKFLOW */
.section-header { text-align: center; max-width: 700px; margin: 0 auto 3rem; }
.section-header p { color: var(--color-text-secondary); font-size: 1.1rem; }
.benefits-section, .workflow-section, .faq-section { margin-bottom: 5rem; }

.benefits-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.benefit-card {
    background: var(--color-surface); padding: 2rem 1.5rem; border-radius: var(--radius-md);
    border: 1px solid var(--color-line); box-shadow: var(--shadow-sm); transition: var(--transition);
}
.benefit-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.benefit-icon {
    width: 48px; height: 48px; border-radius: 12px; background: #eff6ff; color: var(--color-primary);
    display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin-bottom: 1.5rem;
}
.benefit-card h3 { font-size: 1.1rem; margin-bottom: 0.5rem; }
.benefit-card p { margin: 0; color: var(--color-text-secondary); font-size: 0.95rem; }

.workflow-card {
    background: var(--color-surface); padding: 3rem; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md); border: 1px solid var(--color-line); text-align: center;
}
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; margin: 3rem 0; text-align: left; }
.step-card { position: relative; }
.step-number {
    width: 40px; height: 40px; border-radius: 50%; background: var(--color-primary); color: #fff;
    display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 1.2rem; margin-bottom: 1rem;
}
.workflow-actions { display: flex; flex-direction: column; align-items: center; gap: 1rem; }
.workflow-note { font-size: 0.85rem; color: var(--color-text-secondary); }

/* FAQ */
.faq-section { max-width: 800px; margin: 0 auto 5rem; }
.faq-item { margin-bottom: 1rem; }
.faq-item details {
    background: var(--color-surface); padding: 1.2rem 1.5rem; border-radius: var(--radius-md);
    border: 1px solid var(--color-line); transition: var(--transition);
}
.faq-item details[open] { border-color: var(--color-primary); box-shadow: var(--shadow-sm); }
.faq-item summary { list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center; font-weight: 700; font-size: 1.05rem; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: '+'; font-size: 1.5rem; color: var(--color-primary); font-weight: 400; }
.faq-item details[open] summary::after { content: '−'; }
.faq-answer { padding-top: 1rem; color: var(--color-text-secondary); font-size: 0.95rem; }

/* FOOTER */
.footer { background: var(--color-surface); border-top: 1px solid var(--color-line); padding: 2rem 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; color: var(--color-text-secondary); font-size: 0.9rem; }
.footer-links a { color: var(--color-text-secondary); text-decoration: underline; }
.footer-links a:hover { color: var(--color-primary); }

/* STICKY MOBILE CTA */
.sticky-mobile-cta {
    display: none; position: fixed; left: 0; right: 0; bottom: 0;
    padding: 1rem 1rem calc(1rem + env(safe-area-inset-bottom));
    background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
    border-top: 1px solid var(--color-line); box-shadow: 0 -10px 20px rgba(0,0,0,0.05);
    z-index: 1000; transform: translateY(120%); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.sticky-mobile-cta.is-visible { transform: translateY(0); }

/* RESPONSIVE */
@media (max-width: 1024px) {
    .hero-inner { grid-template-columns: 1fr; gap: 2rem; }
    .trial-card { max-width: 600px; margin: 0 auto; }
}

@media (max-width: 768px) {
    .navbar {display: none;}
    .navbar-inner { height: 64px; }
    .nav-link { display: none; }
    .hero { padding: 2rem 0 3rem; }
    .hero h1 { font-size: 1.8rem; }
    
    .hero-actions { flex-direction: column; align-items: stretch; width: 100%; }
    .hero-actions .btn { width: 100%; }
    .hero-trust { flex-direction: column; gap: 0.5rem; text-align: center; }
    .hero-trust span { justify-content: center; }
    
    .content-shell, .workflow-card { padding: 1.5rem; }
    .steps-grid { grid-template-columns: 1fr; gap: 1.5rem; }
    
    .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
    .sticky-mobile-cta { display: block; }
}