/* ===== Переменные (единые с presentation + landing) ===== */
:root {
    --color-primary: #E53935;
    --color-primary-dark: #C62828;
    --color-primary-light: #FFCDD2;
    --color-bg: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text: #1A1A1A;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: #E8E8E8;
    --color-dark: #1e1e2f;
    --color-code-bg: #F5F5F7;
    --color-code-text: #1e1e2f;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --transition: 0.2s ease;
    --container-max: 1100px;
}

/* ===== База ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--color-text);
    line-height: 1.6;
    background: var(--color-bg);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* ===== Фон ===== */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: url('https://floating.freebizmgmt.ru/static/images/bg_presentation.jpg') center top / cover fixed no-repeat;
}

/* ===== Контейнер ===== */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Шапка ===== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.header-nav {
    display: flex;
    gap: 24px;
}

.header-nav a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    transition: var(--transition);
}

.header-nav a:hover {
    color: var(--color-primary);
}

/* ===== Hero / Демо ===== */
.demo-hero {
    text-align: center;
    padding: 80px 0 40px;
}

.demo-icon {
    width: 80px;
    height: 80px;
    background: var(--color-primary-light);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    margin: 0 auto 24px;
}

.demo-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.5;
}

/* ===== Демо-нота ===== */
.demo-note-section {
    padding: 20px 0 40px;
}

.demo-note {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 28px 32px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    border-left: 4px solid var(--color-primary);
    display: flex;
    align-items: flex-start;
    gap: 16px;
    max-width: 700px;
    margin: 0 auto;
}

.note-icon {
    width: 40px;
    height: 40px;
    background: var(--color-primary-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    flex-shrink: 0;
}

.note-content strong {
    display: block;
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: 6px;
}

.note-content p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ===== Код подключения ===== */
.code-section {
    padding: 40px 0;
    text-align: center;
}

.code-label {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
}

.code-block {
    background: var(--color-code-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px 24px;
    max-width: 700px;
    margin: 0 auto 16px;
    text-align: left;
    overflow-x: auto;
}

.code-block code {
    font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--color-code-text);
    word-break: break-all;
}

.code-highlight {
    color: var(--color-primary);
    font-weight: 700;
}

.code-hint {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

.code-hint code {
    background: var(--color-code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'SF Mono', 'Fira Code', 'Courier New', monospace;
    font-size: 0.85rem;
}

/* ===== CTA ===== */
.cta-section {
    padding: 40px 0 80px;
    text-align: center;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--color-primary);
    color: white;
    padding: 16px 32px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
    border: none;
    cursor: pointer;
    margin-bottom: 20px;
}

.cta-button:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(229, 57, 53, 0.3);
}

.cta-footnote {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

.cta-footnote a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.cta-footnote a:hover {
    text-decoration: underline;
}

/* ===== Футер ===== */
.footer {
    background: var(--color-dark);
    color: white;
    padding: 48px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 32px;
    margin-bottom: 32px;
}

.footer-logo {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary-light);
    display: block;
    margin-bottom: 8px;
}

.footer-desc {
    font-size: 0.9rem;
    opacity: 0.7;
}

.footer-links {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    opacity: 0.6;
}

/* ===== Адаптивность ===== */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 12px;
    }

    .demo-hero {
        padding: 48px 0 32px;
    }

    .demo-hero h1 {
        font-size: 1.8rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .demo-note {
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
    }

    .code-block {
        padding: 16px;
    }

    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .demo-icon {
        width: 64px;
        height: 64px;
    }

    .demo-hero h1 {
        font-size: 1.5rem;
    }

    .cta-button {
        padding: 14px 24px;
        font-size: 1rem;
    }

    .code-block code {
        font-size: 0.8rem;
    }
}