/* ПРЕМІАЛЬНИЙ ШВЕЙЦАРСЬКИЙ БРУТАЛІЗМ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    letter-spacing: -0.02em;
}

:root {
    --bg-dark: #0a0b0d;        
    --bg-dark-cards: #0d0f12;  
    --accent: #00E5FF;         
    --text-white: #ffffff;
    --text-muted: #80868c;
    --border-color: rgba(255, 255, 255, 0.08);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-white);
    overflow-x: hidden;
}

/* ШАПКА САЙТА */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 4%;
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    width: 100%;
    top: 0;
    left: 0;
    background: rgba(10, 11, 13, 0.85);
    backdrop-filter: blur(15px);
    z-index: 1000;
}

.brand-logo { font-size: 24px; font-weight: 900; letter-spacing: 2px; text-transform: uppercase; }
.brand-logo .dot { color: var(--accent); }
.main-nav .nav-link { color: var(--text-muted); text-decoration: none; font-size: 14px; font-weight: 500; margin-right: 40px; text-transform: uppercase; letter-spacing: 1px; transition: color 0.3s; }
.main-nav .nav-link:hover { color: var(--text-white); }
.phone-link { color: var(--text-white); text-decoration: none; font-weight: 600; font-size: 15px; border: 1px solid var(--text-white); padding: 10px 20px; border-radius: 50px; transition: all 0.3s ease; white-space: nowrap; }
.phone-link:hover { background: var(--text-white); color: var(--bg-dark); }

/* ГОЛОВНИЙ ЕКРАН (HERO З РЕАЛЬНИМ ФОНОМ ВУЗЛА) */
.hero-premium { 
    height: 100vh; 
    display: flex; 
    align-items: flex-end; 
    padding: 0 4% 80px 4%; 
    border-bottom: 1px solid var(--border-color); 
    background-image: url('vuzol.png'); 
    background-size: cover;
    background-position: center;
    position: relative;
}

/* Захисний преміальний оверлей для читабельності заголовка */
.hero-premium::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 11, 13, 0.45) 0%, rgba(10, 11, 13, 0.98) 100%);
    z-index: 1;
}

/* Виштовхуємо контент над шаром затемнення */
.hero-wrapper { 
    width: 100%; 
    display: flex; 
    flex-direction: column; 
    gap: 60px; 
    position: relative;
    z-index: 2;
}

.hero-subtitle {
    color: var(--accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 3px;
    display: block;
    margin-bottom: 15px;
}

.hero-title {
    font-size: clamp(34px, 6vw, 80px);
    line-height: 0.95;
    font-weight: 900;
    letter-spacing: -0.04em;
}

.hero-footer-area {
    display: grid;
    grid-template-columns: 2fr 1fr;
    align-items: flex-end;
    border-top: 1px solid var(--border-color);
    padding-top: 40px;
}

.hero-description {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 650px;
    line-height: 1.5;
}

/* ОБЩІ СЕКЦІЇ */
.services-premium, .calculator-premium, .about-premium, .contacts-premium, .catalog-page-premium { padding: 120px 4%; border-bottom: 1px solid var(--border-color); }
.section-header-line { display: flex; gap: 20px; align-items: center; margin-bottom: 60px; }
.section-num { color: var(--accent); font-size: 20px; font-weight: 400; }
.section-main-title { font-size: 32px; font-weight: 800; letter-spacing: -1px; text-transform: uppercase; }

/* СІТКА НАПРЯМКІВ НА ГОЛОВНІЙ (ПРЕМІУМ-ПЛИТКА З ГЛИБОКИМ ЗАТЕМНЕННЯМ) */
.premium-card-link { text-decoration: none; color: inherit; display: block; }
.premium-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); 
    border-top: 1px solid var(--border-color); 
    border-left: 1px solid var(--border-color); 
}
.premium-card { 
    position: relative;
    border-right: 1px solid var(--border-color); 
    border-bottom: 1px solid var(--border-color); 
    padding: 60px 40px; 
    display: flex; 
    flex-direction: column; 
    justify-content: space-between; 
    min-height: 380px; 
    background-size: cover;
    background-position: center;
    overflow: hidden;
    transition: all 0.4s ease; 
}
.premium-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 11, 13, 0.4) 0%, rgba(10, 11, 13, 0.96) 85%);
    z-index: 1;
    transition: background 0.4s ease;
}
.premium-card-link:hover .premium-card::before { 
    background: linear-gradient(to bottom, rgba(10, 11, 13, 0.15) 0%, rgba(10, 11, 13, 0.92) 85%); 
}
.premium-card-link:hover .premium-card { border-color: var(--accent); }
.card-num, .card-content, .card-action { position: relative; z-index: 2; }

.card-num { font-size: 14px; color: var(--text-muted); font-weight: 500; }
.card-title { font-size: 26px; font-weight: 700; margin-top: 40px; margin-bottom: 15px; transition: color 0.3s; }
.card-text { color: var(--text-muted); font-size: 15px; line-height: 1.6; }
.card-action { align-self: flex-end; font-size: 24px; color: var(--text-muted); transition: all 0.3s ease; }
.premium-card-link:hover .card-action { color: var(--accent); transform: translateX(5px); }
.premium-card-link:hover .card-title { color: var(--accent); }

/* СІТКА ВІЗУАЛЬНИХ КАРТОК ТОВАРІВ ДЛЯ КАТАЛОГІВ */
.catalog-page-premium { padding-top: 140px; }
.spa-back-button { display: inline-block; background: transparent; border: 1px solid var(--border-color); color: var(--text-white); padding: 14px 24px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px; text-decoration: none; margin-bottom: 50px; transition: all 0.3s ease; }
.spa-back-button:hover { border-color: var(--accent); color: var(--accent); }
.spa-header-block { margin-bottom: 60px; }
.spa-main-title { font-size: clamp(32px, 5vw, 56px); font-weight: 900; text-transform: uppercase; line-height: 1; margin-bottom: 12px; letter-spacing: -0.03em; }
.spa-subtitle-tag { font-size: 11px; color: var(--accent); font-weight: 700; letter-spacing: 2px; }

.visual-product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}
.visual-product-card {
    position: relative;
    min-height: 420px;
    border: 1px solid var(--border-color);
    background-size: cover;
    background-position: center;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 35px;
    overflow: hidden;
    transition: border-color 0.4s ease;
}
.visual-product-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(10, 11, 13, 0.2) 0%, rgba(10, 11, 13, 0.95) 80%);
    z-index: 1;
    transition: background 0.4s ease;
}
.visual-product-card:hover { border-color: var(--accent); }
.visual-product-card:hover::before { background: linear-gradient(to bottom, rgba(10, 11, 13, 0.05) 0%, rgba(10, 11, 13, 0.9) 80%); }
.card-inner-content { position: relative; z-index: 2; display: flex; flex-direction: column; gap: 15px; }

.prod-name { font-size: 22px; font-weight: 900; color: var(--text-white); text-transform: uppercase; }
.prod-desc { font-size: 14px; color: var(--text-muted); line-height: 1.5; min-height: 65px; }
.card-price-action-row { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 20px; margin-top: 10px; }
.prod-price { font-size: 22px; font-weight: 900; color: var(--accent); }

.table-buy-btn { background: transparent; border: 1px solid var(--text-white); color: var(--text-white); padding: 12px 24px; font-size: 11px; text-transform: uppercase; font-weight: 700; letter-spacing: 1px; cursor: pointer; transition: all 0.3s ease; }
.table-buy-btn:hover { background: var(--text-white); color: var(--bg-dark); box-shadow: 0 0 15px rgba(255, 255, 255, 0.2); }

/* ІНТЕРАКТИВНИЙ КАЛЬКУЛЯТОР */
.calculator-wrapper { display: grid; grid-template-columns: 1.2fr 1fr; gap: 80px; align-items: start; }
.calc-hint { font-size: 11px; color: var(--accent); font-weight: 700; letter-spacing: 2px; text-transform: uppercase; display: block; margin-bottom: 40px; }
.calc-tabs-container { display: flex; gap: 15px; margin-bottom: 40px; border-bottom: 1px solid var(--border-color); padding-bottom: 20px; }
.calc-tab-btn { background: transparent; border: 1px solid var(--border-color); color: var(--text-muted); padding: 15px 25px; font-size: 12px; font-weight: 700; cursor: pointer; transition: all 0.3s ease; }
.calc-tab-btn.active { color: var(--accent); border-color: var(--accent); box-shadow: 0 0 15px rgba(0, 229, 255, 0.1); }
.input-group-vertical { display: flex; flex-direction: column; gap: 35px; }
.input-field-wrapper { display: flex; flex-direction: column; gap: 12px; border-bottom: 1px solid var(--border-color); padding-bottom: 15px; transition: border-color 0.4s ease; }
.input-field-wrapper:focus-within { border-color: var(--accent); }
.input-label { font-size: 11px; text-transform: uppercase; color: var(--text-muted); letter-spacing: 1px; font-weight: 500; }
.input-with-unit { display: flex; align-items: baseline; justify-content: space-between; width: 100%; }
.input-with-unit .premium-input { width: auto; flex-grow: 1; }
.input-unit { font-size: 24px; font-weight: 700; color: var(--accent); padding-left: 15px; }
.premium-input { background: transparent; border: none; outline: none; color: var(--text-white); font-size: 38px; font-weight: 800; width: 100%; font-family: inherit; }
.premium-select { cursor: pointer; font-size: 22px !important; padding-right: 30px; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2300E5FF' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right center; }
.premium-select option { background-color: var(--bg-dark-cards); color: #fff; font-size: 16px; padding: 15px; }

.calc-results-block { background-color: var(--bg-dark-cards); border: 1px solid var(--border-color); padding: 50px 40px; display: flex; flex-direction: column; gap: 40px; }
.result-item-main { display: flex; flex-direction: column; gap: 8px; }
.result-label { font-size: 12px; text-transform: uppercase; color: var(--text-muted); }
.result-value-wrapper { display: flex; align-items: baseline; gap: 12px; }
.result-value { font-size: 56px; font-weight: 900; color: var(--text-white); line-height: 1; }
.result-unit { font-size: 24px; font-weight: 700; color: var(--accent); }
.retail-only-block { display: flex; flex-direction: column; gap: 15px; border-top: 1px solid var(--border-color); padding-top: 25px; }
.visual-badge-item { background: rgba(255, 255, 255, 0.01); border-left: 2px solid var(--border-color); padding: 12px 20px; }
.visual-label { font-size: 10px; text-transform: uppercase; color: var(--text-muted); display: block; margin-bottom: 4px; }
.visual-text { font-size: 15px; color: #e2e4e6; }
.highlight-cyan { color: var(--accent); font-weight: 700; }
.border-top-accent { border-top: 1px solid var(--accent); padding-top: 25px; }
.result-sub-label { font-size: 12px; color: var(--text-muted); }
#res-profit { color: #00FF87; font-weight: 700; }

.calc-cta-button { display: flex; justify-content: space-between; align-items: center; background: transparent; border: 1px solid var(--text-white); color: var(--text-white); padding: 22px 30px; font-weight: 700; text-transform: uppercase; font-size: 13px; cursor: pointer; transition: all 0.3s ease; width: 100%; }
.calc-cta-button:hover { background: var(--text-white); color: var(--bg-dark); }
.calc-cta-button .btn-arrow { font-size: 18px; transition: transform 0.3s; }
.calc-cta-button:hover .btn-arrow { transform: translateX(5px); }
.secondary-btn { background: rgba(255, 255, 255, 0.02) !important; border: 1px solid var(--border-color) !important; color: var(--text-muted) !important; }
.secondary-btn:hover { border-color: var(--accent) !important; color: var(--accent) !important; background: transparent !important; }
.calc-disclaimer { font-size: 11px; color: var(--text-muted); line-height: 1.6; }

/* ПРО КОМПАНІЮ / КОНТАКТИ */
.about-wrapper, .contacts-wrapper { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; }
.about-huge-text { font-size: clamp(28px, 4vw, 48px); font-weight: 900; line-height: 1.1; text-transform: uppercase; }
.about-details p { color: var(--text-muted); font-size: 16px; line-height: 1.6; margin-bottom: 30px; }
.about-stats { display: flex; gap: 40px; margin-top: 40px; }
.stat-item { display: flex; flex-direction: column; }
.stat-num { font-size: 36px; font-weight: 800; color: var(--accent); }
.stat-label { font-size: 12px; text-transform: uppercase; color: var(--text-muted); margin-top: 5px; }
.contacts-premium { background-color: var(--bg-dark-cards); }
.info-block { margin-bottom: 40px; }
.info-label { font-size: 11px; text-transform: uppercase; color: var(--accent); letter-spacing: 2px; display: block; margin-bottom: 10px; }
.info-value { font-size: 20px; font-weight: 500; line-height: 1.4; }
.info-value.link { display: block; text-decoration: none; color: #fff; transition: color 0.3s; }
.info-value.link:hover { color: var(--accent); }
.status-badge { display: inline-block; margin-top: 12px; font-size: 11px; text-transform: uppercase; color: #00FF87; font-weight: 700; animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 0.6; } 50% { opacity: 1; } }
.requisites-block { background: rgba(255, 255, 255, 0.01); border: 1px solid var(--border-color); padding: 40px; border-radius: 4px; }
.req-title { font-size: 20px; font-weight: 700; margin-bottom: 30px; }
.req-table { display: flex; flex-direction: column; gap: 20px; }
.req-row { display: flex; flex-direction: column; border-bottom: 1px solid rgba(255, 255, 255, 0.05); padding-bottom: 15px; }
.req-label { font-size: 12px; color: var(--text-muted); margin-bottom: 5px; }
.req-value { font-size: 15px; font-weight: 500; line-height: 1.4; }

/* ПРЕМІУМ МОДАЛКИ */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(10, 11, 13, 0.94); backdrop-filter: blur(25px); z-index: 2000; display: none; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
.modal-overlay.active { opacity: 1; display: flex !important; }
.modal-box { background: var(--bg-dark-cards); border: 1px solid var(--border-color); padding: 60px; max-width: 540px; width: 90%; position: relative; transform: translateY(30px); transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1); }
.modal-overlay.active .modal-box { transform: translateY(0); }
.modal-close-btn { position: absolute; top: 30px; right: 40px; background: transparent; border: none; color: var(--text-muted); font-size: 38px; cursor: pointer; line-height: 1; }
.modal-close-btn:hover { color: var(--accent); }
.modal-hint { font-size: 11px; color: var(--accent); font-weight: 700; letter-spacing: 2px; display: block; margin-bottom: 10px; }
.modal-title { font-size: 32px; font-weight: 900; margin-bottom: 40px; text-transform: uppercase; }
.modal-form { display: flex; flex-direction: column; gap: 35px; }
.modal-field { font-size: 24px !important; }
.modal-summary-data { background: rgba(255, 255, 255, 0.02); border-left: 2px solid var(--accent); padding: 15px 20px; margin-top: -5px; }
.summary-tag { font-size: 10px; text-transform: uppercase; color: var(--text-muted); display: block; margin-bottom: 4px; }
#modal-summary-text { font-size: 14px; line-height: 1.4; color: #fff; }
.spec-modal-btn { margin-top: 10px; }

.site-footer { display: flex; justify-content: space-between; padding: 40px 4%; background-color: var(--bg-dark); font-size: 12px; color: var(--text-muted); border-top: 1px solid var(--border-color); }

/* ========================================================================
   МЕДІА-ЗАПИТИ (АДАПТИВНІСТЬ)
   ======================================================================== */
@media screen and (max-width: 1024px) {
    .hero-footer-area { grid-template-columns: 1fr; gap: 30px; }
    .scroller-button { justify-self: start; }
    .about-wrapper, .contacts-wrapper, .calculator-wrapper { grid-template-columns: 1fr; gap: 60px; }
}
@media screen and (max-width: 768px) {
    .site-header { padding: 20px 5%; }
    .main-nav { display: none; } 
    .services-premium, .calculator-premium, .about-premium, .contacts-premium, .catalog-page-premium { padding: 80px 5% 60px 5%; }
    .hero-title { font-size: 38px; line-height: 1.05; }
    .scroller-button { width: 100%; justify-content: space-between; }
    .premium-grid { grid-template-columns: 1fr; }
    .visual-product-grid { grid-template-columns: 1fr; }
    .visual-product-card { min-height: 380px; padding: 25px; }
    .premium-input { font-size: 28px; }
    .result-value { font-size: 42px; }
    .modal-box { padding: 40px 25px; }
    .site-footer { flex-direction: column; gap: 15px; text-align: center; }
}