:root {
    --bg-black: #0a0a0a;
    --bg-card: #141414;
    --bg-light: #1f1f1f;
    --text-white: #ffffff;
    --text-muted: #a0a0a0;
    --border-color: #2a2a2a;
    --accent-white: #ffffff;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-black);
    color: var(--text-white);
    font-family: var(--font-main);
    line-height: 1.6;
}

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

.top-bar {
    background-color: #000000;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--text-muted);
    padding: 8px 0;
}

.top-bar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.branch-tag {
    margin-left: 15px;
    padding-left: 15px;
    border-left: 1px solid var(--border-color);
}

.header {
    position: sticky;
    top: 0;
    background-color: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 15px 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    color: var(--text-white);
}

.logo-img {
    height: 50px; /* Задайте нужную высоту логотипа */
    width: auto;
    display: block;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-sub {
    font-size: 10px;
    letter-spacing: 3px;
    color: var(--text-muted);
    font-weight: 600;
}

.logo-main {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 25px;
}

.nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.nav a:hover {
    color: var(--text-white);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background-color: var(--text-white);
    color: var(--bg-black);
}

.btn-primary:hover {
    background-color: #e0e0e0;
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-white);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--text-white);
    color: var(--text-white);
}

.btn-outline:hover {
    background: var(--text-white);
    color: var(--bg-black);
}

.btn-block {
    width: 100%;
}

.burger {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.burger span {
    width: 25px;
    height: 2px;
    background-color: var(--text-white);
}

.hero {
    position: relative;
    padding: 100px 0;
    border-bottom: 1px solid var(--border-color);
    text-align: center;
    overflow: hidden; /* Чтобы размытые края фона не вылезали за пределы блока */
}

/* Размытый фон */
.hero::before {
    content: '';
    position: absolute;
    top: -10px; /* Небольшой отступ, чтобы избавиться от белых полей при блюре */
    left: -10px;
    right: -10px;
    bottom: -10px;
    background-image: url('../images/header-bg.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: rgba(0, 0, 0, 0.8);
    background-blend-mode: overlay;
    filter: blur(1px); /* Интенсивность размытия фона (можно настроить под себя) */
    z-index: 1;
}

/* Виньетка по краям и позиционирование контента */
.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Градиентная виньетка: полупрозрачная по центру, темная по краям */
    background: radial-gradient(circle, rgba(0, 0, 0, 0.2) 50%, rgba(0, 0, 0, 0.85) 100%);
    z-index: 2;
    pointer-events: none;
}

/* Гарантируем, что текст и элементы внутри .hero будут поверх фона и виньетки */
.hero > * {
    position: relative;
    z-index: 3;
}

.hero-title {
    font-size: 48px;
    font-weight: 900;
    line-height: 1.2;
    max-width: 800px;
    margin: 0 auto 20px;
    text-transform: uppercase;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 30px;
}

.hero-btns {
    display: flex;
    justify-content: center;
    gap: 15px;
}

.section {
    padding: 80px 0;
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: 32px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.section-desc {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 40px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.service-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 6px;
    transition: var(--transition);
}

.service-card:hover {
    border-color: var(--text-white);
    transform: translateY(-5px);
}

.service-num {
    font-size: 14px;
    font-weight: 800;
    color: var(--text-muted);
    margin-bottom: 15px;
}

.service-card h3 {
    font-size: 20px;
    margin-bottom: 10px;
}

.service-card p {
    color: var(--text-muted);
    font-size: 14px;
}

.calc-section {
    background-color: #0d0d0d;
}

.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 40px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 8px;
    margin-top: 30px;
}

.calc-group {
    margin-bottom: 25px;
}

.calc-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 10px;

}

.inputs-inline {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.inputs-inline span {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 5px;
}

input[type="number"], select, textarea, input[type="text"], input[type="tel"] {
    width: 100%;
    padding: 12px;
    background-color: var(--bg-black);
    border: 1px solid var(--border-color);
    color: var(--text-white);
    border-radius: 4px;
    font-family: inherit;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--text-white);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.custom-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-muted);
}

.calc-form input[type="radio"],
.calc-form input[type="checkbox"] {
    accent-color: var(--text-muted);
    cursor: pointer;
}

.calc-result {
    background-color: var(--bg-black);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 5px;
    max-height: fit-content;
}

.calc-result h3 {
    font-size: 18px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 10px;
}

.result-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 12px;
    font-size: 14px;
}

.total-row {
    font-size: 18px;
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    margin-top: 10px;
    align-items: center;
}

.total-row strong {
    color: var(--text-white);
    font-size: 22px;
}

.calc-note {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 0;
}

.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.material-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 25px;
    border-radius: 6px;
}

.material-card h4 {
    font-size: 18px;
    margin-bottom: 5px;
}

.tag {
    display: inline-block;
    font-size: 11px;
    background-color: var(--bg-light);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 3px;
    margin-bottom: 15px;
}

.portfolio-tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
}

.tab-btn.active, .tab-btn:hover {
    background-color: var(--text-white);
    color: var(--bg-black);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.portfolio-item {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.portfolio-img-placeholder {
    height: 220px;
    background-color: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
}

.portfolio-info {
    padding: 15px;
}

.portfolio-info h4 {
    font-size: 16px;
}

.portfolio-info p {
    font-size: 12px;
    color: var(--text-muted);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.adv-card {
    border-left: 2px solid var(--text-white);
    padding-left: 20px;
}

.adv-card h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.adv-card p {
    color: var(--text-muted);
    font-size: 14px;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.info-list {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-item strong {
    display: block;
    font-size: 14px;
    color: var(--text-muted);
}

.contact-form {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 30px;
    border-radius: 6px;
    height: fit-content;
}

.contact-form h3 {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 15px;
}

/* Номера телефонов */
.phone-link {
    color: var(--text-white);
    font-size: 1.1rem;
    font-weight: 700;
    transition: var(--transition);
}

.phone-link:hover {
    color: var(--text-muted);
}

/* Социальные сети и иконки */
.contact-socials {
    display: flex;
    align-items: center;
    gap: 10px;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    height: 44px;
    padding: 0 12px;
    border-radius: 4px;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-white);
    text-decoration: none;
    font-weight: 800;
    font-size: 13px;
    letter-spacing: 0.5px;
    transition: var(--transition);
}

.social-btn:hover {
    background-color: var(--text-white);
    color: var(--bg-black);
    border-color: var(--text-white);
    transform: translateY(-2px);
}

.social-btn svg {
    display: block;
    fill: currentColor;
}

/* Кнопка "Наверх" */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background-color: var(--border-color);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease, background-color 0.2s ease;
    z-index: 999;
}

.scroll-top-btn.show {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    background-color: var(--bg-card);
    transform: translateY(-3px);
}

.scroll-top-btn:active {
    transform: translateY(0);
}

/* --- FOOTER --- */
.footer {
    background-color: #000;
    padding: 40px 0;
    border-top: 1px solid var(--border-color);
    font-size: 14px;
    color: var(--text-muted);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

@media (max-width: 992px) {
    .calculator-wrapper, .contact-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title { font-size: 32px; }
    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--bg-black);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
    }
    .nav.active { display: flex; }
    .burger { display: flex; }
    .header-container .btn-outline { display: none; }
}