/* ДокументПро — дизайн-система "Vercel Light" */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

:root {
    /* Фоны */
    --color-bg: #fafafa;
    --color-bg-card: #ffffff;
    --color-bg-sidebar: #fafafa;

    /* Границы */
    --color-border: #eaeaea;

    /* Текст */
    --color-text: #171717;
    --color-text-secondary: #666666;
    --color-text-tertiary: #999999;

    /* Акценты */
    --color-accent: #000000;
    --color-accent-hover: #333333;
    --color-success: #0070f3;
    --color-warning: #f5a623;
    --color-danger: #ee0000;
    --color-online: #50e3c2;

    /* Шрифты */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'Geist Mono', 'SF Mono', 'Fira Code', monospace;

    /* Скругления */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Тени */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);

    /* Анимации */
    --transition: 150ms ease;

    --max-width: 1140px;
}

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

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--color-text); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 20px; }

/* === SCROLLBAR === */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #999; }

/* === HEADER === */
.header {
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}
.logo:hover { color: var(--color-text); }
.logo img, .logo svg { height: 28px; width: auto; }

.nav { display: flex; align-items: center; gap: 24px; list-style: none; }
.nav a {
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: color var(--transition);
}
.nav a:hover { color: var(--color-text); }

/* === BUTTONS === */
.btn {
    display: inline-block;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all var(--transition);
    font-family: var(--font-sans);
    line-height: 1.5;
}
.btn-primary {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}
.btn-primary:hover { background: var(--color-accent-hover); }
.btn-outline {
    border-color: var(--color-border);
    color: var(--color-text);
    background: var(--color-bg-card);
}
.btn-outline:hover { border-color: #999; }
.btn-danger {
    background: transparent;
    border-color: var(--color-danger);
    color: var(--color-danger);
}
.btn-danger:hover { background: var(--color-danger); color: #fff; }
.btn-sm { padding: 4px 12px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 14px; }

/* === HERO === */
.hero {
    padding: 80px 0;
    background: var(--color-bg-card);
    border-bottom: 1px solid var(--color-border);
}
.hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 16px;
    max-width: 600px;
}
.hero p {
    font-size: 16px;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 480px;
    line-height: 1.6;
}
.hero-actions { display: flex; gap: 12px; }

/* === SECTIONS === */
.section { padding: 64px 0; }
.section-alt { background: var(--color-bg-card); }
.section-title {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.section-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 48px;
    font-size: 14px;
}

/* === FEATURES === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}
.feature-card {
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: box-shadow var(--transition);
}
.feature-card:hover { box-shadow: var(--shadow-md); }
.feature-icon {
    width: 32px;
    height: 32px;
    background: #f5f5f5;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 18px;
}
.feature-card h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 6px;
}
.feature-card p {
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* === PRICING === */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}
.price-card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    background: var(--color-bg-card);
    position: relative;
    transition: box-shadow var(--transition);
}
.price-card:hover { box-shadow: var(--shadow-md); }
.price-card.featured {
    border-color: var(--color-accent);
}
.price-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.price-card h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}
.price-card .price {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
}
.price-card .price span {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text-tertiary);
}
.price-card .price-desc {
    color: var(--color-text-secondary);
    font-size: 13px;
    margin-bottom: 24px;
}
.price-card ul {
    list-style: none;
    margin-bottom: 24px;
}
.price-card li {
    padding: 4px 0;
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-text-secondary);
}
.price-card li::before {
    content: "\2713";
    color: var(--color-success);
    font-weight: 700;
    font-size: 12px;
}

/* === CLIENTS === */
.clients-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
}
.clients-grid span {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    letter-spacing: -0.01em;
}

/* === FORMS === */
.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--color-text);
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-family: var(--font-sans);
    transition: border-color var(--transition), box-shadow var(--transition);
    background: var(--color-bg-card);
    color: var(--color-text);
}
.form-group input:hover,
.form-group textarea:hover {
    border-color: #999;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.08);
}
.form-group textarea { resize: vertical; min-height: 100px; }

.contact-form { max-width: 480px; margin: 0 auto; }

/* === LOGIN === */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--color-bg);
}
.login-card {
    max-width: 380px;
    width: 100%;
    padding: 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}
.login-card h2 {
    font-size: 24px;
    font-weight: 800;
    text-align: center;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.login-card .login-subtitle {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 13px;
    margin-bottom: 32px;
}
.login-error {
    background: #fff5f5;
    border: 1px solid #fecaca;
    color: var(--color-danger);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 16px;
    display: none;
}
.login-links {
    display: flex;
    justify-content: space-between;
    margin-top: 16px;
    font-size: 12px;
}
.login-links a { color: var(--color-text-secondary); }
.login-links a:hover { color: var(--color-text); }

/* === FOOTER === */
.footer {
    background: var(--color-bg-card);
    border-top: 1px solid var(--color-border);
    padding: 48px 0 24px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 32px;
    margin-bottom: 32px;
}
.footer h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-text);
}
.footer p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.7; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 8px; }
.footer a { color: var(--color-text-secondary); font-size: 13px; }
.footer a:hover { color: var(--color-text); }
.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--color-text-tertiary);
}

/* === BLOG === */
.blog-list { max-width: 680px; margin: 0 auto; }
.blog-item {
    padding: 24px 0;
    border-bottom: 1px solid var(--color-border);
}
.blog-item:first-child { padding-top: 0; }
.blog-item h3 { font-size: 16px; font-weight: 600; margin-bottom: 6px; }
.blog-item h3 a { color: var(--color-text); }
.blog-item h3 a:hover { color: var(--color-accent); }
.blog-meta { font-size: 12px; color: var(--color-text-tertiary); margin-bottom: 8px; }
.blog-excerpt { font-size: 13px; color: var(--color-text-secondary); }

.article { max-width: 680px; margin: 0 auto; }
.article h1 { font-size: 28px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 12px; }
.article .blog-meta { margin-bottom: 32px; }
.article p { margin-bottom: 16px; font-size: 14px; line-height: 1.7; }
.article h2 { font-size: 18px; font-weight: 600; margin: 32px 0 12px; letter-spacing: -0.01em; }
.article ul, .article ol { margin: 0 0 16px 24px; }
.article li { margin-bottom: 8px; font-size: 14px; }

/* === ARTICLE CARDS (главная — последние статьи) === */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 16px;
}
.article-card {
    display: block;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: box-shadow var(--transition), border-color var(--transition);
    text-decoration: none;
    color: var(--color-text);
}
.article-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #ccc;
    color: var(--color-text);
}
.article-card .article-date {
    font-size: 12px;
    color: var(--color-text-tertiary);
    display: block;
    margin-bottom: 8px;
}
.article-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}
.article-card p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* === PAGE HEADER === */
.page-header {
    background: var(--color-bg-card);
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border);
}
.page-header h1 {
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.page-header p {
    color: var(--color-text-secondary);
    font-size: 14px;
}

/* === CONTACT INFO === */
.contact-info { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.contact-details h3 { font-size: 16px; font-weight: 600; margin-bottom: 16px; }
.contact-details p { font-size: 13px; color: var(--color-text-secondary); margin-bottom: 8px; }

/* === LEGAL === */
.legal { max-width: 680px; margin: 0 auto; }
.legal h2 { font-size: 18px; font-weight: 600; margin: 32px 0 12px; }
.legal p { margin-bottom: 12px; font-size: 13px; color: var(--color-text-secondary); line-height: 1.7; }
.legal ul { margin: 0 0 12px 24px; }
.legal li { margin-bottom: 6px; font-size: 13px; color: var(--color-text-secondary); }

/* === MOBILE === */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 8px;
    color: var(--color-text);
}

@media (max-width: 768px) {
    .mobile-toggle { display: block; }
    .nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--color-bg-card);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: 16px 20px;
        gap: 12px;
    }
    .nav.open { display: flex; }

    .hero h1 { font-size: 32px; }
    .hero { padding: 48px 0; }
    .hero-actions { flex-direction: column; }

    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; gap: 8px; }

    .pricing-grid { grid-template-columns: 1fr; }
    .contact-info { grid-template-columns: 1fr; }
}