/* AI-Решение — единые стили сайта */
:root {
    --primary-deep: #0A4D8C;
    --primary-bright: #1E88E5;
    --primary-light: #42A5F5;
    --sky-light: #90CAF9;
    --sky-pale: #BBDEFB;
    --azure: #29B6F6;
    --dark: #0D1B2A;
    --gray-dark: #415A77;
    --gray-light: #E0E8F0;
    --white: #FFFFFF;
    --gradient-sky: linear-gradient(135deg, #1E88E5 0%, #42A5F5 50%, #90CAF9 100%);
    --gradient-deep: linear-gradient(180deg, #0A4D8C 0%, #1E88E5 100%);
    --gradient-infinity: linear-gradient(45deg, #29B6F6 0%, #1E88E5 50%, #0A4D8C 100%);
    --gradient-hero: linear-gradient(180deg, #0A4D8C 0%, #1E88E5 50%, #42A5F5 100%);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--dark);
    background: var(--white);
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 860px; margin: 0 auto; padding: 0 20px; }

/* Header */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(30, 136, 229, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--sky-pale);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 0;
    gap: 16px;
    flex-wrap: wrap;
}

.logo {
    font-size: 26px;
    font-weight: 800;
    background: var(--gradient-infinity);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}

.nav-links {
    display: flex;
    gap: 28px;
    list-style: none;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--gray-dark);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--primary-bright); }

.cta-btn {
    background: var(--gradient-sky);
    color: var(--white);
    padding: 12px 24px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    border: none;
    cursor: pointer;
    font-size: 15px;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(30, 136, 229, 0.4);
}

/* Page hero (inner pages) */
.page-hero {
    background: var(--gradient-hero);
    color: var(--white);
    padding: 56px 0 48px;
    text-align: center;
}

.page-hero h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: 16px;
    line-height: 1.2;
}

.page-hero .lead {
    font-size: 1.1rem;
    opacity: 0.95;
    max-width: 720px;
    margin: 0 auto;
    color: var(--white);
}

/* Main content */
main.content { padding: 56px 0 72px; }

.section-title {
    font-size: 2rem;
    font-weight: 800;
    text-align: center;
    margin-bottom: 12px;
    color: var(--dark);
}

.section-subtitle {
    text-align: center;
    color: var(--gray-dark);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.breadcrumb {
    font-size: 14px;
    color: var(--gray-dark);
    margin-bottom: 24px;
}

.breadcrumb a { color: var(--primary-bright); text-decoration: none; }

.answer-first {
    background: var(--gray-light);
    border-left: 4px solid var(--primary-bright);
    padding: 20px 24px;
    margin: 28px 0;
    border-radius: 0 12px 12px 0;
    font-size: 1.05rem;
    line-height: 1.65;
}

/* Cards grid */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.case-card,
.blog-card {
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: 16px;
    padding: 28px;
    transition: all 0.3s;
}

.case-card:hover,
.blog-card:hover {
    border-color: var(--primary-light);
    box-shadow: 0 12px 40px rgba(30, 136, 229, 0.12);
    transform: translateY(-4px);
}

.case-card h2,
.blog-card h2 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    line-height: 1.3;
}

.case-card h2 a,
.blog-card h2 a {
    color: var(--dark);
    text-decoration: none;
}

.case-card h2 a:hover { color: var(--primary-bright); }

.case-card .metrics {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin: 16px 0;
}

.case-card .metric {
    background: var(--sky-pale);
    color: var(--primary-deep);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 14px;
}

.read-more {
    color: var(--primary-bright);
    font-weight: 600;
    text-decoration: none;
}

.read-more:hover { text-decoration: underline; }

/* Article typography */
article h1 { font-size: 2rem; margin-bottom: 20px; line-height: 1.25; }
article h2 { font-size: 1.4rem; margin: 36px 0 16px; color: var(--primary-deep); }
article h3 { font-size: 1.15rem; margin: 24px 0 12px; }
article p { margin-bottom: 16px; color: var(--gray-dark); }
article ul, article ol { margin: 0 0 20px 24px; color: var(--gray-dark); }
article li { margin-bottom: 8px; }
article a { color: var(--primary-bright); }
article blockquote {
    border-left: 4px solid var(--primary-light);
    padding: 16px 24px;
    margin: 24px 0;
    background: var(--gray-light);
    border-radius: 0 8px 8px 0;
    font-style: italic;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.95rem;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

th, td {
    border: 1px solid var(--gray-light);
    padding: 14px 18px;
    text-align: left;
}

th {
    background: var(--primary-bright);
    color: var(--white);
    font-weight: 600;
}

tr:nth-child(even) td { background: #f8fbff; }

/* Glossary */
.glossary-term {
    border-bottom: 1px solid var(--gray-light);
    padding: 24px 0;
}

.glossary-term dt {
    font-weight: 700;
    font-size: 1.15rem;
    margin-bottom: 8px;
    color: var(--primary-deep);
}

.glossary-term dd { color: var(--gray-dark); margin: 0; }

/* FAQ */
details.faq-item {
    border: 2px solid var(--gray-light);
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
}

details.faq-item summary {
    padding: 20px 24px;
    font-weight: 600;
    cursor: pointer;
    list-style: none;
}

details.faq-item summary::-webkit-details-marker { display: none; }
details.faq-item[open] summary { background: var(--sky-pale); }
details.faq-item .faq-answer {
    padding: 0 24px 20px;
    color: var(--gray-dark);
}

/* CTA band */
.cta-band {
    background: var(--gradient-hero);
    color: var(--white);
    text-align: center;
    padding: 48px 20px;
    border-radius: 16px;
    margin-top: 48px;
}

.cta-band h2 { font-size: 1.75rem; margin-bottom: 12px; }
.cta-band p { opacity: 0.9; margin-bottom: 24px; }

/* Footer */
footer {
    background: var(--dark);
    color: var(--white);
    padding: 64px 0 28px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h4 {
    margin-bottom: 20px;
    font-size: 18px;
    color: var(--sky-light);
}

.footer-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s;
}

.footer-column a:hover { color: var(--sky-light); }

.footer-legal {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    color: rgba(255,255,255,0.6);
    font-size: 14px;
    line-height: 1.8;
}

@media (max-width: 768px) {
    .nav-links { gap: 16px; font-size: 14px; }
    nav { justify-content: center; }
    .page-hero { padding: 40px 0 36px; }
}

/* Hero (landing) */
.hero {
    background: var(--gradient-hero);
    color: var(--white);
    padding: 72px 0 64px;
    text-align: center;
}

.hero .channel-tag {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 14px;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.15;
}

.hero .subtitle {
    font-size: 1.15rem;
    opacity: 0.95;
    max-width: 720px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.cta-btn-secondary {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
    box-shadow: none;
}

.cta-btn-secondary:hover {
    background: var(--white);
    color: var(--primary-bright);
}

/* Services grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.service-card {
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: 16px;
    padding: 28px 24px;
    text-align: center;
    transition: border-color 0.3s;
}

.service-card:hover { border-color: var(--primary-light); }
.service-card .icon { font-size: 2.5rem; margin-bottom: 12px; }
.service-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.service-card p { color: var(--gray-dark); font-size: 0.95rem; }

/* Platforms */
.platforms-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 32px;
}

@media (max-width: 768px) {
    .platforms-grid { grid-template-columns: 1fr; }
}

.platform-card {
    background: var(--gray-light);
    border-radius: 16px;
    padding: 32px 24px;
    text-align: center;
}

.platform-card h3 { margin-bottom: 8px; color: var(--primary-deep); }
.platform-card p { color: var(--gray-dark); font-size: 0.95rem; }

/* Example cards with image */
.example-card {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 28px;
    background: var(--white);
    border: 2px solid var(--gray-light);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 24px;
    transition: all 0.3s;
}

.example-card:hover {
    border-color: var(--primary-light);
    box-shadow: 0 12px 40px rgba(30, 136, 229, 0.1);
}

@media (max-width: 768px) {
    .example-card { grid-template-columns: 1fr; }
}

.example-card img {
    width: 100%;
    height: 100%;
    min-height: 220px;
    object-fit: cover;
    display: block;
}

.example-thumb {
    display: block;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

.example-thumb:hover img {
    opacity: 0.92;
}

.example-thumb-placeholder {
    background: var(--gray-light);
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.example-card h3 a {
    color: inherit;
    text-decoration: none;
}

.example-card h3 a:hover {
    color: var(--primary-bright);
}

.example-url {
    margin: 12px 0 16px;
    font-size: 0.9rem;
}

.example-url a {
    color: var(--primary-bright);
    word-break: break-all;
}

.demo-open-btn {
    background: var(--gradient-sky);
    color: var(--white);
    padding: 12px 24px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 15px rgba(30, 136, 229, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    font-size: 15px;
}

.demo-open-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(30, 136, 229, 0.4);
    color: var(--white);
}

.example-card-body { padding: 28px 28px 28px 0; }
@media (max-width: 768px) {
    .example-card-body { padding: 0 24px 24px; }
}

.platform-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.platform-tg { background: #e3f2fd; color: #1565c0; }
.platform-vk { background: #e8eaf6; color: #283593; }
.platform-max { background: #fce4ec; color: #c62828; }

.example-card h3 { font-size: 1.35rem; margin-bottom: 8px; }
.example-card ul { margin: 16px 0; padding-left: 20px; color: var(--gray-dark); }
.example-card li { margin-bottom: 6px; }
.example-result {
    background: var(--sky-pale);
    padding: 12px 16px;
    border-radius: 8px;
    font-weight: 600;
    color: var(--primary-deep);
    margin: 16px 0;
    font-size: 0.95rem;
}

/* Process steps */
.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 32px;
}

.process-step {
    text-align: center;
    padding: 24px 16px;
}

.process-step .step-num {
    width: 48px;
    height: 48px;
    background: var(--gradient-sky);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.25rem;
    margin: 0 auto 16px;
}

.process-step h3 { font-size: 1.05rem; margin-bottom: 8px; }
.process-step p { color: var(--gray-dark); font-size: 0.95rem; }

/* Pricing block */
.pricing-box {
    background: var(--gray-light);
    border-radius: 16px;
    padding: 40px;
    max-width: 640px;
    margin: 32px auto 0;
    text-align: center;
}

.pricing-box .price {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary-deep);
    margin: 16px 0;
}

.pricing-box ul {
    text-align: left;
    max-width: 400px;
    margin: 24px auto;
    color: var(--gray-dark);
}

.pricing-note { font-size: 0.9rem; color: var(--gray-dark); margin-top: 16px; }

.section { padding: 64px 0; }
.section-alt { background: #f8fbff; }

/* --- Рефреш 2026: доступность и полировка (ui-ux-pro-max) --- */

/* Якоря не прячутся под липкой шапкой + плавный скролл */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

/* Видимые focus-состояния для клавиатурной навигации */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
.cta-btn:focus-visible,
.demo-open-btn:focus-visible {
    outline: 3px solid var(--azure);
    outline-offset: 2px;
    border-radius: 8px;
}

/* Контрастный фокус на тёмных секциях (hero, cta-band, footer) */
.hero a:focus-visible,
.cta-band a:focus-visible,
footer a:focus-visible {
    outline-color: var(--white);
}

/* Чуть более «кликабельные» карточки */
.service-card,
.platform-card { cursor: default; }

/* Уважаем системную настройку «меньше движения» */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
    }
    .cta-btn:hover,
    .demo-open-btn:hover,
    .case-card:hover,
    .blog-card:hover,
    .example-card:hover { transform: none; }
}