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

body {
    font-family: 'Inter', sans-serif;
    background-color: #ffffff;
    color: #1e293b;
    line-height: 1.6;
    scroll-behavior: smooth;
}

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    letter-spacing: -0.02em;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    padding: 20px 0;
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    z-index: 100;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.5rem;
    color: #0f172a;
}

.logo i {
    color: #10b981;
    font-size: 1.8rem;
}

/* Language selector */
.language-select select {
    text-align: center;
    padding: 8px 18px;
    border: 1.5px solid #cbd5e1;
    border-radius: 40px;
    font-weight: 500;
    color: #1e293b;
    background: transparent;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
    appearance: none;
}

.language-select select:hover {
    border-color: #10b981;
    color: #10b981;
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    font-weight: 500;
    color: #334155;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: #10b981;
}

.header-buttons {
    display: flex;
    gap: 16px;
}

.btn-outline {
    padding: 8px 18px;
    border: 1.5px solid #cbd5e1;
    border-radius: 40px;
    font-weight: 500;
    color: #1e293b;
    transition: all 0.2s;
}

.btn-outline:hover {
    border-color: #10b981;
    color: #10b981;
}

.btn-primary {
    padding: 8px 22px;
    background: #10b981;
    color: #ffffff;
    font-weight: 600;
    border-radius: 40px;
    transition: box-shadow 0.2s;
}

.btn-primary:hover {
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.4);
}

.menu-toggle {
    display: none;
    font-size: 1.8rem;
    color: #10b981;
}

.hero {
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    top: -50%;
    left: -10%;
    width: 120%;
    height: 120%;
    background-image:
            linear-gradient(#cbd5e1 1px, transparent 1px),
            linear-gradient(90deg, #cbd5e1 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
    opacity: 0.3;
}

.hero .container {
    position: relative;
    z-index: 2;
    max-width: 900px;
    text-align: center;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.1;
    margin-bottom: 24px;
}

.hero h1 .highlight {
    color: #10b981;
    position: relative;
    display: inline-block;
}

.hero h1 .highlight::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 0;
    width: 100%;
    height: 8px;
    background: rgba(16, 185, 129, 0.2);
    border-radius: 4px;
    z-index: -1;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: #475569;
    margin-bottom: 40px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Section general */
.section {
    padding: 60px 0;
    border-bottom: 1px solid #e2e8f0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 24px;
    color: #0f172a;
}

.section-sub {
    color: #475569;
    margin-bottom: 40px;
    max-width: 800px;
}

/* Grid helpers */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* Cards base */
.card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 28px;
    padding: 28px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.05);
}

.card i {
    font-size: 2.2rem;
    color: #10b981;
    margin-bottom: 16px;
}

.card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.card p {
    color: #475569;
}

/* Feature cards */
.feature-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 28px;
    padding: 28px 20px;
    transition: transform 0.2s, border-color 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: #10b981;
    box-shadow: 0 10px 30px rgba(16,185,129,0.1);
}

.feature-card i {
    font-size: 2.5rem;
    color: #10b981;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: #0f172a;
}

.feature-card p {
    color: #475569;
    font-size: 0.95rem;
}

/* Audience cards */
.audience-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    border-radius: 24px;
    padding: 28px 20px;
    text-align: center;
    transition: 0.2s;
}

.audience-card:hover {
    background: #ffffff;
    border-color: #2563eb;
    box-shadow: 0 8px 20px rgba(37,99,235,0.08);
}

.audience-card i {
    font-size: 2.2rem;
    color: #2563eb;
    margin-bottom: 16px;
}

.audience-card h3 {
    color: #0f172a;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.audience-card p {
    color: #475569;
}

/* Case cards */
.case-card {
    background: #f8fafc;
    border-radius: 28px;
    padding: 32px 24px;
    border-bottom: 3px solid #10b981;
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

.case-card i {
    font-size: 2.5rem;
    color: #10b981;
    margin-bottom: 16px;
}

.case-card h3 {
    color: #0f172a;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.case-card p {
    color: #475569;
}

/* Story cards */
.story-card {
    background: #f8fafc;
    border-radius: 28px;
    padding: 28px;
    border: 1px solid #e2e8f0;
}

.story-card i {
    font-size: 2rem;
    color: #10b981;
    margin-bottom: 16px;
}

.story-card h3 {
    color: #0f172a;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.story-card p {
    color: #475569;
}

.badge {
    display: inline-block;
    background: #e2e8f0;
    color: #1e293b;
    padding: 4px 12px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.divider-light {
    width: 100%;
    height: 1px;
    background: #e2e8f0;
    margin: 40px 0;
}

/* Philosophy block */
.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.compare-box {
    background: #f8fafc;
    border-radius: 32px;
    padding: 32px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.02);
}

.centralized .flow {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #dc2626;
}

.flow i {
    font-size: 1.8rem;
}

.divider {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, #e7e7e7, transparent);
    margin: 30px 0;
}

.decentralized, .centralized {
    display: flex;
    justify-content: space-around;
}

.decentralized .item, .centralized .item {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: #10b981;
}

.decentralized .item span, .centralized .item span {
    font-weight: bold;
}

.centralized .item {
    color: #dc2626;
}

.decentralized i, .centralized i {
    font-size: 2.5rem;
    margin-bottom: 8px;
}

/* Features grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 40px;
}

/* Audience grid */
.audience-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* Cases grid */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Economy block */
.economy-block {
    background: #f1f5f9;
    border-radius: 40px;
    padding: 40px;
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
    border: 1px solid #e2e8f0;
}

.chart-bars {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: 40px;
    padding: 20px 0;
}

.bar {
    width: 80px;
    background: #cbd5e1;
    border-radius: 20px 20px 8px 8px;
    position: relative;
    text-align: center;
}

.bar.old {
    height: 160px;
    background: linear-gradient(to top, #f87171, #b91c1c);
}

.bar.new {
    height: 0;
    background: linear-gradient(to top, #10b981, #047857);
}

.bar span {
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    white-space: nowrap;
    font-weight: 600;
    color: #0f172a;
}

.bar small {
    position: absolute;
    bottom: -30px;
    left: 50%;
    transform: translateX(-50%);
    color: #475569;
}

/* Security block */
.security-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background: #f1f5f9;
    border-radius: 40px;
    padding: 40px;
    border: 1px solid #e2e8f0;
}

.security-icon {
    font-size: 3rem;
    color: #633e23;
    margin-bottom: 16px;
}

.legal-note {
    background: #ffffff;
    padding: 24px;
    border-radius: 24px;
    border-left: 4px solid #fbbf24;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

/* Stories grid */
.stories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* FAQ */
.faq-list {
    max-width: 800px;
}

.faq-item {
    background: #f8fafc;
    border-radius: 24px;
    margin-bottom: 16px;
    padding: 24px;
    border: 1px solid #e2e8f0;
}

.faq-question {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: #10b981;
}

.faq-answer {
    color: #334155;
}

/* Pros/Cons list */
.pros-cons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.pros-list, .cons-list {
    background: #f8fafc;
    border-radius: 28px;
    padding: 32px;
    border: 1px solid #e2e8f0;
}

.pros-list h3, .cons-list h3 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pros-list ul, .cons-list ul {
    list-style: none;
}

.pros-list li, .cons-list li {
    margin-bottom: 12px;
    padding-left: 28px;
    position: relative;
}

.pros-list li::before {
    content: "\f00c";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: #10b981;
    position: absolute;
    left: 0;
}

.cons-list li::before {
    content: "\f071";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    color: #f59e0b;
    position: absolute;
    left: 0;
}

/* Steps */
.steps {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 30px;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1 1 200px;
    background: #f8fafc;
    border-radius: 24px;
    padding: 24px;
    text-align: center;
    border: 1px solid #e2e8f0;
}

.step .number {
    display: inline-block;
    width: 40px;
    height: 40px;
    background: #10b981;
    color: white;
    border-radius: 50%;
    line-height: 40px;
    font-weight: 700;
    margin-bottom: 16px;
}

/* Footer */
.footer {
    padding: 60px 0 30px;
    background: #f1f5f9;
    border-top: 1px solid #e2e8f0;
}

.footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 30px;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: #334155;
}

.footer-links a:hover {
    color: #10b981;
}

.footer-cta .btn-primary {
    padding: 12px 36px;
    font-size: 1.1rem;
}

/* ===== АДАПТАЦИЯ ===== */
@media (max-width: 1024px) {
    .features-grid, .audience-grid, .cases-grid, .stories-grid, .grid-4, .grid-3, .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu, .header-buttons {
        display: none;
    }
    .menu-toggle {
        display: block;
    }
    .two-col {
        grid-template-columns: 1fr;
    }
    .features-grid, .audience-grid, .cases-grid, .stories-grid, .grid-4, .grid-3, .grid-2, .pros-cons {
        grid-template-columns: 1fr;
    }
    /* исправляем блок безопасности — превращаем в одну колонку */
    .security-block {
        grid-template-columns: 1fr;
    }
    .economy-block {
        flex-direction: column;
    }
    .footer .container {
        flex-direction: column;
        text-align: center;
    }
    .hero h1 {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .container {
        padding: 0 16px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 60px 0 30px;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
    .hero-subtitle {
        font-size: 1rem;
    }
    .hero-buttons .btn-primary, .hero-buttons .btn-outline {
        padding: 8px 16px;
        font-size: 0.9rem;
    }
    .section {
        padding: 40px 0;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .card, .feature-card, .audience-card, .case-card, .story-card, .pros-list, .cons-list, .step, .faq-item {
        padding: 20px;
    }
    .economy-block, .security-block {
        padding: 24px;
    }
    .bar {
        width: 70px;
    }
    .bar span {
        font-size: 0.9rem;
    }
    .bar small {
        font-size: 0.8rem;
    }
    .logo {
        font-size: 1.3rem;
    }
    .logo i {
        font-size: 1.5rem;
    }
    .language-select select {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    .chart-bars {
        flex-wrap: wrap;
        gap: 20px;
    }
    .centralized, .decentralized {
        flex-wrap: wrap;
        gap: 15px;
    }
    .centralized i, .decentralized i {
        font-size: 2rem;
    }
    .centralized .item span, .decentralized .item span {
        font-size: 0.9rem;
    }
}

@media (max-width: 360px) {
    .hero h1 {
        font-size: 1.6rem;
    }
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    .hero-buttons a {
        text-align: center;
    }
    .container {
        padding: 0 12px;
    }
    .section-title {
        font-size: 1.6rem;
    }
    .bar {
        width: 60px;
    }
    .bar.old {
        height: 120px;
    }
    .bar.new {
        height: 0;
    }
    .bar span {
        font-size: 0.8rem;
        top: -25px;
    }
    .bar small {
        font-size: 0.7rem;
        bottom: -25px;
    }
    .chart-bars {
        gap: 12px;
    }
}