:root {
    --font-scale: 1.3;
    --nav-bg: #132a3e;
    --nav-bg-2: #1a3853;
    --accent: #16a4fa;
    --accent-2: #0b84d6;
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #1e2a36;
    --muted: #6a7885;
    --border: #e6ecf2;
    --success: #22c55e;
    --shadow: 0 8px 30px rgba(19, 42, 62, .08);
    --shadow-lg: 0 20px 50px rgba(19, 42, 62, .14);
    --radius: 16px;
    --danger: #ef4444;
}

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

html {
    scroll-behavior: smooth
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: .2s
}

a:hover {
    color: var(--accent-2)
}

img {
    max-width: 100%;
    /*display: block*/
}

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

/* === HEADER === */
.topbar {
    background: var(--nav-bg);
    color: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, .2)
}

.topbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    max-width: 1200px;
    margin: 0 auto;
    gap: 16px
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: calc(18px * var(--font-scale));
    color: #fff;
    line-height: 1
}

.logo-icon {
    width: 34px;
    height: 34px
}

.header-right {
    display: flex;
    align-items: center;
    gap: 14px
}

.lang-switcher {
    position: relative
}

.lang-btn {
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .15);
    color: #fff;
    padding: 7px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: calc(13px * var(--font-scale));
    display: flex;
    align-items: center;
    gap: 6px;
    transition: .2s;
    white-space: nowrap
}

.lang-btn:hover {
    background: rgba(255, 255, 255, .15)
}

.lang-menu {
    position: absolute;
    right: 0;
    top: calc(100% + 8px);
    background: #fff;
    color: var(--text);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    min-width: 160px;
    padding: 8px;
    display: none;
    z-index: 200
}

.lang-menu.show {
    display: block
}

.lang-menu a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 12px;
    border-radius: 8px;
    color: var(--text);
    font-size: calc(14px * var(--font-scale))
}

.lang-menu a:hover {
    background: var(--bg)
}

.lang-menu a.active {
    background: var(--accent);
    color: #fff
}

.lang-menu a::before {
    margin-top: 1px;
}

.lang-btn .flag::before {
    margin-bottom: 2px;
}

.flag {
    display: flex;
    align-items: center;
    gap: 6px;
}

.flag::before {
    content: '';
    width: 20px;
    height: 16px;
    flex-shrink: 0;
    border-radius: 4px;
}

.flag-en::before {
    background: url('/public/v2/img/languages/dropdown/en.svg') no-repeat center / cover;
}

.flag-de::before {
    background: url('/public/v2/img/languages/dropdown/de.svg') no-repeat center / cover;
}

.flag-es::before {
    background: url('/public/v2/img/languages/dropdown/es.svg') no-repeat center / cover;
}

.flag-fr::before {
    background: url('/public/v2/img/languages/dropdown/fr.svg') no-repeat center / cover;
}

.flag-pt::before {
    background: url('/public/v2/img/languages/dropdown/pt.svg') no-repeat center / cover;
}

.flag-ru::before {
    background: url('/public/v2/img/languages/dropdown/ru.svg') no-repeat center / cover;
}

.flag-zh::before {
    background: url('/public/v2/img/languages/dropdown/zh.svg') no-repeat center / cover;
}


.burger {
    width: 35px;
    background: transparent;
    border: 0;
    color: #fff;
    font-size: calc(22px * var(--font-scale));
    cursor: pointer;
    display: none;
    padding: 6px
}

/* === NAV === */
.mainnav {
    background: #fff;
    /*border-bottom: 1px solid var(--border)*/
}

.mainnav-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    padding: 0 20px
}

.mainnav.small a {
    font-size: calc(11px * var(--font-scale));
}
.mainnav.smaller a {
    font-size: calc(10.6px * var(--font-scale));
}

.mainnav a {
    color: var(--text);
    padding: 16px 20px;
    font-size: calc(13px * var(--font-scale));
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: .2s
}

.mainnav a:hover {
    color: var(--accent);
    background: var(--bg)
}

.mainnav a.active {
    background: var(--accent);
    color: #fff;
    border-bottom-color: var(--accent-2)
}
.content-main h1, .content-main h2, .content-main h3, .content-main h4 {
    line-height: 1;
    margin: 20px 0;
}
.content-main ul, .content-main ol {
    margin: 10px 0 10px 20px;
}
.content-main {
    line-height: 1.8;
    background: var(--card);
    border-radius: 20px;
    padding: 36px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    margin: 40px 0;
}

.content-main h1 .accent {
    background: linear-gradient(135deg, var(--accent), #6fd1ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent
}

/* burger menu */
@media (max-width: 1180px) {
    .burger {
        display: block
    }

    .mainnav {
        display: none
    }

    .mainnav.open {
        display: block;
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        box-shadow: var(--shadow-lg)
    }

    .mainnav-inner {
        flex-direction: column;
        padding: 0
    }

    .mainnav a {
        padding: 14px 20px;
        border-bottom: 1px solid var(--border)
    }

    .mainnav a.active {
        border-bottom-color: var(--border)
    }
}

/* recaptcha v3 in left corner */
.grecaptcha-badge {
    left: 0 !important;
    right: auto !important;
    text-align: left !important;
    margin-left: 10px !important;
    bottom: 15px !important;
    z-index: 900;
}

.bcrumbs {
    font-size: calc(13px * var(--font-scale));
    color: var(--muted);
    margin: 20px 0 0 0;
}
.bcrumbs a { color: var(--muted); }
.bcrumbs a:hover { color: var(--accent); }

/* === FOOTER === */
footer {
    background: var(--nav-bg);
    color: #cbd5e0;
    padding: 40px 0 20px;
    margin-top: 40px
}

.footer-grid {
    display: grid;
    grid-template-columns:repeat(auto-fit, minmax(180px, 1fr));
    gap: 28px;
    margin-bottom: 28px
}

.footer-col .footer-title {
    color: #fff;
    font-size: calc(14px * var(--font-scale));
    margin-bottom: 12px;
    letter-spacing: .5px
}

.footer-col a {
    display: block;
    color: #9db0c4;
    padding: 5px 0;
    font-size: calc(14px * var(--font-scale))
}

.footer-col a:hover {
    color: var(--accent)
}

.socials {
    display: flex;
    gap: 10px;
    margin-top: 10px
}

.socials a {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    background: rgba(255, 255, 255, .08);
    border-radius: 50%;
    color: #fff;
    font-size: calc(14px * var(--font-scale));
    padding: 0
}

.socials a:hover {
    background: var(--accent);
    transform: translateY(-2px);
    color: #fff
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding-top: 18px;
    text-align: center;
    font-size: calc(13px * var(--font-scale));
    color: #7d90a4
}