/* ============================================================
   site-chrome.css — каркас сайта (шапка, подвал-виджеты, прелоадер)
   Извлечено из дизайна трубы23.рф для раздела статей.
   Дизайн-переменные (:root) подключаются в <style> страницы.
   ============================================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

h1,h2,h3,h4,h5 {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

/* ========== PRELOADER ========== */
.preloader {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-deep);
    display: flex; justify-content: center; align-items: center;
    z-index: 9999;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}
.preloader.hidden { opacity: 0; visibility: hidden; }
.preloader-inner { display: flex; flex-direction: column; align-items: center; gap: 24px; }
.preloader-pipes { width: 80px; height: 80px; position: relative; }
.preloader-pipes .pipe { position: absolute; border-radius: 4px; background: var(--accent); }
.preloader-pipes .pipe-h { height: 8px; animation: pipeFlowH 1.4s ease-in-out infinite; }
.preloader-pipes .pipe-v { width: 8px; animation: pipeFlowV 1.4s ease-in-out infinite; }
.preloader-pipes .pipe:nth-child(1) { top: 0; left: 0; width: 0; }
.preloader-pipes .pipe:nth-child(2) { top: 0; right: 0; height: 0; }
.preloader-pipes .pipe:nth-child(3) { bottom: 0; right: 0; width: 0; }
.preloader-pipes .pipe:nth-child(4) { bottom: 0; left: 0; height: 0; }
.preloader-pipes .pipe:nth-child(1) { animation-delay: 0s; }
.preloader-pipes .pipe:nth-child(2) { animation-delay: 0.35s; }
.preloader-pipes .pipe:nth-child(3) { animation-delay: 0.7s; }
.preloader-pipes .pipe:nth-child(4) { animation-delay: 1.05s; }
@keyframes pipeFlowH {
    0% { width: 0; opacity: 1; }
    50% { width: 80px; opacity: 1; }
    100% { width: 80px; opacity: 0; }
}
@keyframes pipeFlowV {
    0% { height: 0; opacity: 1; }
    50% { height: 80px; opacity: 1; }
    100% { height: 80px; opacity: 0; }
}
.preloader-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 14px; letter-spacing: 4px; text-transform: uppercase;
    color: var(--accent); opacity: 0.7;
}

/* ========== HEADER ========== */
#header {
    position: fixed; top: 0; left: 0; right: 0;
    padding: 12px 48px;
    display: flex; justify-content: space-between; align-items: center;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(0, 85, 212, 0.08);
    transition: var(--transition);
}
#header.scrolled {
    padding: 8px 48px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 2px 20px rgba(15, 28, 46, 0.08);
}
.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}
.logo { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.logo-img { height: 44px; width: auto; object-fit: contain; filter: brightness(1.1); }
.logo-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 20px; font-weight: 700;
    color: var(--text-white);
    letter-spacing: -0.5px;
}
.logo-text span { color: var(--accent); }

#mainNav { display: flex; gap: 32px; position: relative; }
#mainNav a, #mainNav button {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500; font-size: 13px;
    text-transform: uppercase; letter-spacing: 1px;
    position: relative; padding: 6px 0;
    transition: var(--transition);
    background: none;
    border: none;
    cursor: pointer;
    font-family: 'Inter', sans-serif;
}
#mainNav a::after, #mainNav button::after {
    content: ''; position: absolute;
    bottom: 0; left: 50%; width: 0; height: 2px;
    background: var(--accent);
    transition: var(--transition);
    transform: translateX(-50%);
}
#mainNav a:hover, #mainNav button:hover { color: var(--text-white); }
#mainNav a:hover::after, #mainNav button:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 16px; }
.header-phone {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600; font-size: 15px;
    display: flex; align-items: center; gap: 8px;
    transition: var(--transition);
}
.header-phone:hover { color: var(--text-white); }
.btn-header-cta {
    background: var(--gradient-orange);
    color: #FFFFFF;
    padding: 11px 28px; border-radius: 50px;
    text-decoration: none; font-weight: 700;
    font-size: 13px; text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    display: flex; align-items: center; gap: 8px;
    box-shadow: 0 6px 20px rgba(255, 94, 14, 0.3);
    border: none; cursor: pointer;
}
.btn-header-cta:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 32px rgba(255, 94, 14, 0.4);
}

/* Mobile Menu button */
.mobile-menu-btn {
    display: none; flex-direction: column; gap: 5px;
    cursor: pointer; padding: 10px; background: none; border: none;
    position: relative; z-index: 1002;
}
.mobile-menu-btn span {
    width: 24px; height: 2px;
    background: var(--accent);
    transition: var(--transition);
    border-radius: 2px;
}
.mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translateY(12px); }
.mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translateY(-12px); }

/* Mobile Navigation */
#mainNav.mobile-#mainNav {
    position: fixed;
    top: 60px; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex !important;
    flex-direction: column;
    gap: 0;
    padding: 20px 0;
    overflow-y: auto;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-100%);
    transition: var(--transition);
    z-index: 999;
}
#mainNav.mobile-nav.show {
    opacity: 1; visibility: visible; transform: translateX(0);
}
#mainNav.mobile-nav a, #mainNav.mobile-nav button {
    display: block;
    padding: 14px 24px;
    border-radius: 0;
    text-transform: none;
    letter-spacing: 0;
    font-size: 14px;
    color: var(--text-secondary);
}
#mainNav.mobile-nav a:hover, #mainNav.mobile-nav button:hover {
    background: rgba(0, 85, 212, 0.06);
    color: var(--accent);
}
#mainNav.mobile-nav a::after, #mainNav.mobile-nav button::after { display: none; }

#mainNav .mobile-nav-extra { display: none; }
#mainNav.mobile-#mainNav .mobile-nav-extra {
    display: flex; flex-direction: column; gap: 12px;
    padding: 20px 24px 12px;
}
#mainNav.mobile-#mainNav .mobile-nav-extra a.mnav-phone {
    font-size: 20px; font-weight: 700; color: var(--primary);
    display: flex; align-items: center; gap: 10px; text-decoration: none;
    padding: 6px 0;
}
#mainNav.mobile-#mainNav .mobile-nav-extra .mnav-btn {
    background: var(--gradient-orange); color: #fff;
    padding: 14px 20px; border-radius: 50px; border: none;
    font-weight: 700; font-size: 13px; text-transform: uppercase;
    letter-spacing: 1px; cursor: pointer; text-align: center;
    text-decoration: none; display: flex; align-items: center; justify-content: center; gap: 8px;
}

/* ========== SECTION BADGE (хаб) ========== */
.section-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: var(--primary-glow);
    border: 1px solid rgba(0, 85, 212, 0.12);
    padding: 8px 20px; border-radius: 50px;
    margin-bottom: 20px;
    font-size: 12px; font-weight: 600;
    color: var(--accent);
    text-transform: uppercase; letter-spacing: 2px;
}
.section-badge i { color: var(--accent); }

/* ========== SCROLL TO TOP ========== */
.scroll-top {
    position: fixed; bottom: 30px; right: 30px;
    width: 48px; height: 48px;
    background: linear-gradient(135deg, #00235A 0%, #1F4F9F 100%);
    border: none; border-radius: 50%;
    color: #FFFFFF;
    font-size: 18px; cursor: pointer;
    opacity: 0; visibility: hidden;
    transition: var(--transition); z-index: 900;
    box-shadow: 0 4px 16px rgba(0, 35, 90, 0.28);
    display: flex; align-items: center; justify-content: center;
}
.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { transform: translateY(-3px); }

/* ========== MAX WIDGET ========== */
#max-icon {
    position: fixed; bottom: 100px; right: 30px;
    width: 60px; height: 60px;
    cursor: pointer; z-index: 1001;
    border-radius: 50%;
    transition: var(--transition);
    opacity: 0; transform: scale(0.5);
    filter: drop-shadow(0 4px 14px rgba(0, 0, 0, 0.3));
}
#max-icon.loaded { opacity: 1; transform: scale(1); }
#max-icon:hover { transform: scale(1.1); }
.max-tooltip {
    position: fixed; bottom: 170px; right: 30px;
    background: var(--bg-card);
    color: var(--text-white);
    padding: 10px 18px;
    border-radius: var(--radius-sm);
    font-size: 13px; font-weight: 500;
    border: 1px solid var(--glass-border);
    opacity: 0; transform: translateY(10px);
    transition: var(--transition);
    pointer-events: none; z-index: 1002;
    white-space: nowrap;
}

/* ========== COOKIE BANNER ========== */
#cookie-banner {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: var(--glass-strong);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    padding: 20px 48px;
    z-index: 999;
    display: none;
    align-items: center; justify-content: center;
    gap: 24px; flex-wrap: wrap;
    opacity: 0; transform: translateY(20px);
    transition: var(--transition);
}
#cookie-banner.visible { opacity: 1; transform: translateY(0); }
#cookie-banner p {
    font-size: 13px; color: var(--text-secondary);
    max-width: 680px; line-height: 1.6;
}
#cookie-banner a { color: var(--primary); text-decoration: none; }
.cookie-buttons { display: flex; gap: 12px; }
#cookie-accept {
    background: linear-gradient(135deg, #00235A 0%, #1F4F9F 100%);
    color: #FFFFFF;
    padding: 10px 28px; border-radius: 50px;
    border: none; cursor: pointer;
    font-size: 13px; font-weight: 600;
    transition: var(--transition);
}
#cookie-accept:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(0, 85, 212, 0.25);
}

/* ========== RESPONSIVE (каркас) ========== */
@media (max-width: 992px) {
    #header { padding: 12px 24px; }
    #header.scrolled { padding: 8px 24px; }
    #mainNav { display: none !important; }
    #mainNav.mobile-#mainNav { display: flex !important; }
    .mobile-menu-btn { display: flex; }
    .header-actions { display: none; }
}

@media (max-width: 480px) {
    #header { padding: 10px 16px; }
    .logo-text { font-size: 16px; }
    #cookie-banner { padding: 14px 16px; gap: 14px; }
    #cookie-banner p { font-size: 12px; }
}

/* ========== FOOTER ========== */
footer {
    background: var(--bg-main);
    border-top: 1px solid var(--glass-border);
    padding: 72px 48px 32px;
}
.footer-content {
    max-width: 1400px; margin: 0 auto;
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand p {
    color: var(--text-secondary);
    font-size: 13px; line-height: 1.7;
    margin-bottom: 20px;
}
.footer-socials { display: flex; gap: 12px; }
.footer-social-link {
    width: 40px; height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    color: var(--text-secondary);
    font-size: 16px;
    transition: var(--transition);
    text-decoration: none;
}
.footer-social-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}
.footer-column h4 {
    font-size: 14px; font-weight: 700;
    color: var(--text-white);
    text-transform: uppercase; letter-spacing: 1px;
    margin-bottom: 20px;
}
.footer-column ul { list-style: none; }
.footer-column ul li { margin-bottom: 10px; }
.footer-column ul li a {
    color: var(--text-secondary);
    text-decoration: none; font-size: 13px;
    transition: var(--transition);
}
.footer-column ul li a:hover { color: var(--accent); }

.footer-bottom {
    max-width: 1400px; margin: 48px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(0, 85, 212, 0.06);
    display: flex; justify-content: space-between;
    align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { font-size: 12px; color: var(--text-muted); }
.footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none; font-size: 12px;
    transition: var(--transition);
}
.footer-bottom a:hover { color: var(--accent); }

/* GEO FOOTER (перелинковка по городам) */
.geo-footer {
    max-width: 1400px; margin: 44px auto 0;
    padding: 22px 0 6px;
    border-top: 1px solid rgba(0, 85, 212, 0.07);
}
.geo-footer-title {
    font-size: 11px; color: var(--text-muted);
    text-transform: uppercase; letter-spacing: 1.2px;
    margin-bottom: 12px; text-align: center;
}
.geo-footer-links { text-align: center; line-height: 2; }
.geo-footer-links a {
    font-size: 11px; color: var(--text-muted); text-decoration: none;
    margin: 0 3px; white-space: nowrap; transition: var(--transition-fast);
}
.geo-footer-links a:hover { color: var(--accent); }
.geo-footer-links .gf-sep { color: rgba(90, 111, 133, 0.35); font-size: 10px; margin: 0 1px; }
.geo-footer-links .gf-current {
    font-size: 11px; color: var(--text-secondary); font-weight: 600;
    margin: 0 3px; white-space: nowrap;
}

@media (max-width: 1200px) {
    .footer-content { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .footer-content { grid-template-columns: 1fr; gap: 32px; }
    footer { padding: 48px 24px 24px; }
    .geo-footer-links a, .geo-footer-links .gf-current { font-size: 10px; }
}