/* ======== GOOGLE FONTS ======== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Montserrat:wght@500;600;700&display=swap');

/* ======== CSS VARIABLES ======== */
:root {
    --font-family-body: 'Inter', sans-serif;
    --font-family-heading: 'Montserrat', sans-serif;
    --color-logo-blue: #1D4D6B;
    --color-logo-green: #3D8C40;
    --color-accent-gold: #C9B47F;
    
    /* V11 Smoky White Theme */
    --bg-color: #F0F2F5; 
    --bg-color-alt: #FFFFFF; 
    --text-color: #212529;
    --text-color-light: #495057;
    --heading-color: var(--color-logo-blue);
    --primary-color: var(--color-logo-green);
    --primary-color-hover: #317034;
    --border-color: rgba(0, 0, 0, 0.07);
    --border-color-light: rgba(0, 0, 0, 0.05);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.07);
    --header-bg: rgba(240, 242, 245, 0.85);
    --card-bg: rgba(255, 255, 255, 0.8);
    
    --header-height: 4.5rem;
    --max-width: 1280px;
    --border-radius: 16px;
    --transition-main: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --z-fixed: 100;
    --z-modal: 1000;
    --z-tooltip: 10;
}

[data-theme="dark"] {
    --bg-color: #1A2B36;
    --bg-color-alt: #223645;
    --text-color: #E0E0E0;
    --text-color-light: #A0B3C1;
    --heading-color: #FFFFFF;
    --primary-color: #58D68D;
    --primary-color-hover: #70E0A0;
    --border-color: rgba(255, 255, 255, 0.1);
    --border-color-light: rgba(255, 255, 255, 0.08);
    --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    --header-bg: rgba(26, 43, 54, 0.85);
    --card-bg: rgba(34, 54, 69, 0.7);
    --color-accent-gold: #D4AF37;
}

/* ======== BASE ======== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
body {
    font-family: var(--font-family-body);
    font-size: 1rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.35s ease, color 0.35s ease;
    overflow-x: hidden;
}
h1, h2, h3, h4, h5, h6 { font-family: var(--font-family-heading); color: var(--heading-color); font-weight: 600; text-wrap: balance; }
ul { list-style: none; }
a { text-decoration: none; color: var(--primary-color); transition: var(--transition-main); }
a:hover { color: var(--primary-color-hover); }
img { max-width: 100%; height: auto; }

/* ======== PRELOADER (NEW) ======== */
#preloader {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background-color: var(--bg-color);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}
.preloader-content { animation: pulse 2s infinite; }
.preloader-logo { width: 80px; height: auto; }
@keyframes pulse { 0% { transform: scale(1); opacity: 1; } 50% { transform: scale(1.1); opacity: 0.7; } 100% { transform: scale(1); opacity: 1; } }

/* ======== PARTICLES ======== */
#particles-js { position: fixed; width: 100%; height: 100%; top: 0; left: 0; z-index: -1; }

/* ======== LOGOS & LAYOUT ======== */
.logo { height: 40px; width: auto; transition: var(--transition-main); }
.logo-dark { display: none; }
[data-theme="dark"] .logo-light { display: none; }
[data-theme="dark"] .logo-dark { display: block; }
.container { max-width: var(--max-width); width: 100%; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 6rem 0 4rem; position: relative; }
.section__header { text-align: center; margin-bottom: 3.5rem; }
.section__title { font-size: 2.5rem; margin-bottom: 0.5rem; }
.section__subtitle { font-size: 1rem; color: var(--color-accent-gold); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }

/* ======== BUTTONS ======== */
.button { display: inline-block; padding: 0.9rem 2.2rem; border-radius: var(--border-radius); font-weight: 600; font-family: var(--font-family-heading); cursor: pointer; transition: var(--transition-main); border: none; position: relative; z-index: 1; overflow: hidden; }
.button-primary { background-color: var(--primary-color); color: #FFFFFF; box-shadow: 0 4px 15px -5px var(--primary-color); }
.button-primary:hover { background-color: var(--primary-color-hover); color: #FFFFFF; transform: translateY(-3px); box-shadow: 0 8px 25px -5px var(--primary-color); }
[data-theme="light"] .button-primary { color: #FFFFFF; }

/* ======== HEADER ======== */
.header { width: 100%; position: fixed; top: 0; left: 0; z-index: var(--z-fixed); background-color: var(--header-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-color-light); transition: var(--transition-main); }
.header.is-scrolled { background-color: var(--header-bg); box-shadow: 0 4px 12px rgba(0,0,0,0.05); }
[data-theme="dark"] .header.is-scrolled { box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
.header__container { height: var(--header-height); display: flex; justify-content: space-between; align-items: center; }
.nav__list { display: flex; gap: 2.5rem; }
.nav__link { font-weight: 600; font-family: var(--font-family-heading); color: var(--text-color); position: relative; padding-bottom: 0.25rem; font-size: 0.95rem; }
.nav__link::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background-color: var(--color-accent-gold); transition: var(--transition-main); }
.nav__link:hover { color: var(--heading-color); }
.nav__link:hover::after { width: 100%; }

/* Close button (hidden on desktop) */
.nav__close { display: none; }

.nav__toggle { display: none; font-size: 1.5rem; cursor: pointer; color: var(--heading-color); }
.nav__toggle svg { width: 32px; height: 32px; }
.header__controls { display: flex; align-items: center; gap: 0.75rem; }

/* Buttons */
.lang-switcher, .theme-switcher {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    font-family: var(--font-family-heading);
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition-main);
    width: 44px; height: 44px; /* Square/Circle touch target */
    display: flex; align-items: center; justify-content: center;
}
.theme-switcher { border-radius: 50%; color: var(--heading-color); position: relative; overflow: hidden; }
.lang-switcher:hover, .theme-switcher:hover { border-color: var(--color-accent-gold); color: var(--heading-color); transform: translateY(-2px); }
[data-theme="light"] .lang-switcher, [data-theme="light"] .theme-switcher { background-color: rgba(255, 255, 255, 0.6); }

.theme-icon { width: 22px; height: 22px; position: absolute; transition: transform 0.4s ease-out, opacity 0.3s ease-out; }
.theme-icon.sun { fill: var(--heading-color); stroke: none; transform: scale(1) rotate(0deg); opacity: 1; }
.theme-icon.moon { fill: none; stroke: var(--heading-color); transform: scale(0) rotate(-90deg); opacity: 0; }
[data-theme="dark"] .theme-icon.sun { transform: scale(0) rotate(90deg); opacity: 0; }
[data-theme="dark"] .theme-icon.moon { transform: scale(1) rotate(0deg); opacity: 1; }

/* ======== SECTIONS ======== */
/* ... (Hero, About, Advantages, Services, Process, Partners styles - Same as V11) ... */
.hero { padding-top: calc(var(--header-height) + 6rem); padding-bottom: 8rem; text-align: center; }
.hero__tag { display: inline-block; background-color: var(--color-accent-gold); color: var(--color-logo-blue); padding: 0.5rem 1rem; border-radius: var(--border-radius); font-size: 0.9rem; font-weight: 600; margin-bottom: 1.5rem; }
[data-theme="dark"] .hero__tag { color: var(--bg-color); }
.hero__title { font-size: 3.5rem; font-weight: 700; margin-bottom: 1.5rem; line-height: 1.2; text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); }
[data-theme="dark"] .hero__title { text-shadow: 0 2px 15px rgba(0, 0, 0, 0.3); }
.hero__subtitle { font-size: 1.35rem; color: var(--text-color-light); max-width: 700px; margin: 0 auto 2.5rem; line-height: 1.6; }
.about__container { display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: flex-start; }
.about__content .section__header { text-align: left; margin-bottom: 2rem; }
.about__description { font-size: 1.1rem; line-height: 1.7; color: var(--text-color-light); margin-bottom: 1.5rem; }
.about__mission { display: flex; flex-direction: column; gap: 2rem; margin-top: 1rem; }
.mission__block { background-color: var(--card-bg); padding: 2.5rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); border-left: 5px solid var(--color-accent-gold); box-shadow: var(--card-shadow); }
.mission__title { font-size: 1.5rem; margin-bottom: 1rem; color: var(--heading-color); }
.mission__text { font-size: 1rem; line-height: 1.7; font-style: italic; color: var(--text-color-light); }
.values__list { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.values__list li { background-color: var(--bg-color-alt); color: var(--heading-color); font-weight: 600; font-size: 0.9rem; padding: 0.6rem 1rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); }
[data-theme="dark"] .values__list li { background-color: var(--bg-color); }
.advantages__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; }
.advantage-card { background-color: var(--card-bg); padding: 2.5rem 2rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); box-shadow: var(--card-shadow); text-align: center; transition: var(--transition-main); }
.advantage-card:hover { transform: translateY(-10px); border-color: var(--color-accent-gold); box-shadow: 0 12px 35px rgba(0, 0, 0, 0.1); }
[data-theme="dark"] .advantage-card:hover { box-shadow: 0 0 30px -5px var(--color-accent-gold); }
.advantage-card__icon { margin-bottom: 1.5rem; }
.advantage-card__icon svg { width: 48px; height: 48px; color: var(--primary-color); }
[data-theme="light"] .advantage-card__icon svg { color: var(--color-logo-blue); }
.advantage-card__title { font-size: 1.25rem; margin-bottom: 1rem; }
.advantage-card__desc { font-size: 0.95rem; line-height: 1.6; color: var(--text-color-light); }
.services__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.service-card { background-color: var(--card-bg); padding: 3rem 2.5rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); transition: var(--transition-main); }
.service-card:hover { transform: scale(1.02); box-shadow: var(--card-shadow); border-color: var(--primary-color); }
[data-theme="dark"] .service-card:hover { box-shadow: 0 0 30px -5px var(--primary-color); }
.service-card__title { font-size: 1.4rem; margin-bottom: 1rem; color: var(--primary-color); }
[data-theme="light"] .service-card__title { color: var(--color-logo-blue); }
.service-card__description { font-size: 1rem; line-height: 1.6; color: var(--text-color-light); }
.service-card--full { grid-column: 1 / -1; text-align: center; }
.process__timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem; position: relative; margin-top: 2rem; }
.process__timeline::before { content: ''; position: absolute; top: 24px; left: 2rem; right: 2rem; height: 2px; background-color: var(--border-color); z-index: 0; }
.process-step { position: relative; z-index: 1; }
.process-step__number { display: inline-flex; align-items: center; justify-content: center; width: 50px; height: 50px; background-color: var(--bg-color-alt); border: 2px solid var(--primary-color); color: var(--primary-color); font-weight: 700; font-family: var(--font-family-heading); font-size: 1.2rem; border-radius: 50%; margin-bottom: 1.5rem; }
[data-theme="light"] .process-step__number { border-color: var(--color-logo-blue); color: var(--color-logo-blue); }
.process-step__title { font-size: 1.15rem; margin-bottom: 0.75rem; }
.process-step__desc { font-size: 0.9rem; line-height: 1.6; color: var(--text-color-light); }
.partners__container { text-align: center; }
.partners__desc { font-size: 1.1rem; color: var(--text-color-light); max-width: 700px; margin: 0 auto 3rem; }
.partners__logos { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 2rem; opacity: 0.7; }
.partner-logo-placeholder { font-size: 1.1rem; font-weight: 600; color: var(--text-color-light); border: 2px dashed var(--border-color); padding: 1.5rem 2.5rem; border-radius: var(--border-radius); transition: var(--transition-main); }
.partner-logo-placeholder:hover { opacity: 1; color: var(--heading-color); border-color: var(--color-accent-gold); }
.contact__container { max-width: 700px; text-align: center; background-color: var(--card-bg); padding: 4rem; border-radius: var(--border-radius); border: 1px solid var(--border-color); }
.contact__content .section__header { margin-bottom: 1.5rem; }
.contact__text { font-size: 1.1rem; color: var(--text-color-light); line-height: 1.7; margin-bottom: 2.5rem; }
.contact__links { display: flex; flex-direction: column; gap: 1.5rem; align-items: center; margin-bottom: 2.5rem; }
.contact__link { display: flex; align-items: center; gap: 0.75rem; font-size: 1.2rem; font-weight: 600; color: var(--heading-color); }
.contact__link:hover { color: var(--primary-color); }
.contact__link svg { width: 24px; height: 24px; color: var(--primary-color); }
.button-social { background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%); color: #FFFFFF; display: inline-flex; align-items: center; gap: 0.75rem; box-shadow: 0 4px 15px -5px #dc2743; }
.button-social:hover { color: #FFFFFF; box-shadow: 0 8px 20px -5px #dc2743; transform: translateY(-3px); }
.button-social svg { width: 20px; height: 20px; }
.footer { background-color: var(--bg-color-alt); color: var(--text-color-light); padding-top: 4rem; border-top: 1px solid var(--border-color); margin-top: 3rem; }
[data-theme="dark"] .footer { background-color: #111827; border-top: 1px solid var(--border-color); }
.footer__container { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2rem; padding-bottom: 3rem; }
.footer__logo-link { display: inline-block; margin-bottom: 1rem; }
.footer__logo-link .logo { height: 45px; }
.footer__description { max-width: 300px; font-size: 0.9rem; line-height: 1.6; }
.footer__title { font-size: 1.1rem; color: var(--heading-color); margin-bottom: 1.2rem; font-weight: 600; }
.footer__list { display: flex; flex-direction: column; gap: 0.75rem; }
.footer__link { color: var(--text-color-light); font-size: 0.95rem; }
.footer__link:hover { color: var(--primary-color); padding-left: 0.25rem; }
.footer__contact { display: flex; flex-direction: column; gap: 0.5rem; }
.footer__info { font-size: 0.95rem; color: var(--text-color-light); }
.footer__bottom { border-top: 1px solid var(--border-color); padding: 1.5rem 0; text-align: center; }
.footer__copy { font-size: 0.9rem; color: var(--text-color-light); }

/* ======== SCROLL UP (NEW) ======== */
.scrollup {
    position: fixed;
    right: 1rem;
    bottom: -20%;
    background-color: var(--primary-color);
    opacity: 0.8;
    padding: 0 0.3rem;
    border-radius: 0.4rem;
    z-index: var(--z-tooltip);
    transition: 0.4s;
    color: #FFF;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
}
.scrollup:hover { background-color: var(--primary-color-hover); }
.scrollup.show-scroll { bottom: 3rem; } /* Показать кнопку */

/* ======== ANIMATIONS ON SCROLL ======== */
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease-out, transform 0.6s ease-out; }
.animate-on-scroll.is-visible { opacity: 1; transform: translateY(0); }

/* ======== RESPONSIVE (FIXED) ======== */
@media screen and (max-width: 992px) {
    .container { margin-left: 1.5rem; margin-right: 1.5rem; }
    .about__container { grid-template-columns: 1fr; }
    .advantages__grid { grid-template-columns: 1fr 1fr; }
    .process__timeline { grid-template-columns: 1fr 1fr; }
    .process__timeline::before { display: none; }
    .footer__container { grid-template-columns: 1fr 1fr; }
    .footer__content { grid-column: 1 / -1; text-align: center; }
    .footer__description { margin: 0 auto; }
}

@media screen and (max-width: 768px) {
    .section { padding: 4rem 0 2rem; }
    .container { margin-left: 1rem; margin-right: 1rem; padding: 0 0.5rem; }
    
    /* ИСПРАВЛЕНО: Меню теперь на весь экран и закрывает контент */
    .nav {
        position: fixed;
        top: 0;
        right: -100%; /* Спрятано */
        width: 100%;
        height: 100%;
        background-color: var(--header-bg);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 6rem 2rem 2rem;
        transition: var(--transition-main);
        z-index: var(--z-modal);
        display: flex;
        flex-direction: column;
        justify-content: center; /* Центрируем пункты меню */
    }
    .nav.show-menu { right: 0; } /* Показать */

    /* ИСПРАВЛЕНО: Кнопка закрытия видна на мобильном */
    .nav__close {
        display: block;
        position: absolute;
        top: 1.5rem;
        right: 1.5rem;
        color: var(--heading-color);
        cursor: pointer;
    }

    .nav__list { flex-direction: column; gap: 2rem; font-size: 1.2rem; }
    .nav__toggle { display: block; } /* Бургер виден */
    
    /* Остальная адаптация */
    .hero__title { font-size: 2.5rem; }
    .advantages__grid, .services__grid, .process__timeline { grid-template-columns: 1fr; }
    .contact__container { padding: 2.5rem 1.5rem; }
    .footer__container { grid-template-columns: 1fr; text-align: center; }
}