/* Базовые переменные и сброс */
:root {
    --primary: #FFB800; /* Ярко-желтый/оранжевый (электрика) */
    --primary-hover: #E6A600;
    --dark: #1A1A1A;
    --light-bg: #F5F7FA;
    --white: #FFFFFF;
    --text-main: #333333;
    --text-muted: #666666;
    --whatsapp: #25D366;
    --whatsapp-hover: #1da851;
    --telegram-bg: #E3F2FD;
    --whatsapp-bg: #E8F5E9;
    --max-color: #2962FF; /* Фирменный синий цвет мессенджера MAX (VK) */
    --max-hover: #1E4ED8;
    --footer-bg: #1A1A1A;
    --btn-text: #1A1A1A;
    --hero-bg: url('hero-bg.webp');
    --hero-overlay: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.5));
}

[data-theme="dark"] {
    --dark: #F5F7FA; 
    --light-bg: #1E1E1E; 
    --white: #121212; 
    --text-main: #E0E0E0;
    --text-muted: #A0A0A0;
    --telegram-bg: #2C3E50;
    --whatsapp-bg: #1E3A2F;
    --footer-bg: #0D0D0D;
    --btn-text: #1A1A1A;
    --hero-bg: url('hero-bg_dark.webp');
    --hero-overlay: linear-gradient(rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0.45));
}

@media (max-width: 768px) {
    :root {
        --hero-bg: url('hero-bg-mobile.webp');
    }
    [data-theme="dark"] {
        --hero-bg: url('hero-bg_dark-mobile.webp');
    }
}

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

body, .header, .adv-card, .services-list, .service-item, .chat-message, .tg-message, .wa-message, .advantages, .reviews, .footer {
    transition: background-color 0.5s ease, color 0.5s ease, border-color 0.5s ease, box-shadow 0.5s ease;
}

html, body {
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

body {
    overflow-x: hidden;
    font-family: 'Montserrat', sans-serif;
    color: var(--text-main);
    background-color: var(--white);
    line-height: 1.6;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Шапка (Header) */
.header {
    background-color: rgba(255, 255, 255, 0.5); /* Более прозрачная для эффекта стекла */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

[data-theme="dark"] .header {
    background-color: rgba(18, 18, 18, 0.5);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.logo-icon {
    color: var(--primary);
}

.theme-toggle.isometric-toggle {
    background: none;
    border: none;
    cursor: pointer;
    margin: 0;
    width: 70px;
    height: 60px;
    position: relative;
    outline: none;
    perspective: 800px;
    border-radius: 0;
    overflow: visible;
}

.theme-toggle.isometric-toggle:hover {
    background: none;
}

.isometric-toggle .iso-track,
.isometric-toggle .iso-thumb {
    position: absolute;
    top: 50%;
    left: 50%;
    transform-style: preserve-3d;
}

.isometric-toggle .iso-track {
    width: 58px;
    height: 26px;
    background: #3a3a3a;
    transform: translate(-50%, -50%) rotateX(50deg) rotateZ(-45deg);
    box-shadow: -4px 4px 10px rgba(0, 0, 0, 0.2);
    transition: background 0.8s ease;
}

/* Track 3D faces */
.isometric-toggle .iso-track::before {
    content: '';
    position: absolute;
    right: 100%;
    top: 0;
    width: 7px;
    height: 100%;
    background: #2a2a2a;
    transform-origin: right;
    transform: rotateY(-90deg);
    transition: background 0.8s ease;
}
.isometric-toggle .iso-track::after {
    content: '';
    position: absolute;
    left: 0;
    top: 100%;
    width: 100%;
    height: 7px;
    background: #1a1a1a;
    transform-origin: top;
    transform: rotateX(-90deg);
    transition: background 0.8s ease;
}

/* Thumb styles */
.isometric-toggle .iso-thumb {
    width: 26px;
    height: 26px;
    background: #ffffff;
    box-shadow: -4px 4px 8px rgba(0, 0, 0, 0.15);
    transition: transform 1.2s cubic-bezier(0.34, 1.56, 0.64, 1), background 0.8s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.isometric-toggle[data-position="-1"] .iso-thumb {
    transform: translate(-50%, -50%) rotateX(50deg) rotateZ(-45deg) translate3d(-16px, 0, 10px);
}
.isometric-toggle[data-position="0"] .iso-thumb {
    transform: translate(-50%, -50%) rotateX(50deg) rotateZ(-45deg) translate3d(0px, 0, 10px);
}
.isometric-toggle[data-position="1"] .iso-thumb {
    transform: translate(-50%, -50%) rotateX(50deg) rotateZ(-45deg) translate3d(16px, 0, 10px);
}

/* Fallback for no JS / initial load */
.isometric-toggle:not([data-position]) .iso-thumb {
    transform: translate(-50%, -50%) rotateX(50deg) rotateZ(-45deg) translate3d(-16px, 0, 10px);
}
.isometric-toggle[data-state="dark"]:not([data-position]) .iso-thumb {
    transform: translate(-50%, -50%) rotateX(50deg) rotateZ(-45deg) translate3d(16px, 0, 10px);
}

/* Thumb 3D faces */
.isometric-toggle .iso-thumb::before {
    content: '';
    position: absolute;
    right: 100%;
    top: 0;
    width: 11px;
    height: 100%;
    background: #e6e6e6;
    transform-origin: right;
    transform: rotateY(-90deg);
    transition: background 0.8s ease;
}
.isometric-toggle .iso-thumb::after {
    content: '';
    position: absolute;
    left: 0;
    top: 100%;
    width: 100%;
    height: 11px;
    background: #cccccc;
    transform-origin: top;
    transform: rotateX(-90deg);
    transition: background 0.8s ease;
}

/* Dark mode state colors */
.isometric-toggle[data-theme-color="dark"] .iso-thumb {
    background: var(--primary);
}
.isometric-toggle[data-theme-color="dark"] .iso-thumb::before {
    background: var(--primary-hover);
}
.isometric-toggle[data-theme-color="dark"] .iso-thumb::after {
    background: #cc9300;
}

/* Auto text */
.isometric-toggle .iso-text {
    font-size: 10px;
    font-weight: 800;
    color: #555;
    transform: rotateZ(45deg);
    opacity: 0;
    transition: opacity 0.5s ease 0.3s, color 0.8s ease;
    pointer-events: none;
    user-select: none;
}
.isometric-toggle[data-theme-color="dark"] .iso-text {
    color: #333;
}
.isometric-toggle[data-position="0"] .iso-text {
    opacity: 1;
}

.nav {
    display: flex;
    gap: 15px;
    align-items: center;
    margin-left: auto;
    overflow: hidden;
}

.nav a {
    font-weight: 600;
    font-size: 13px;
    white-space: nowrap;
    transition: color 0.6s ease;
}

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

.nav a.active {
    color: var(--primary);
    position: relative;
}

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary);
    border-radius: 2px;
}



/* Главный экран (Hero) */
.hero {
    position: relative;
    z-index: 1;
    background: var(--hero-overlay), var(--hero-bg) center/cover;
    background-position: center;
    background-size: cover;
    color: #FFFFFF;
    padding: 120px 0;
    text-align: center;
    transition: background-image 0.5s ease;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 20px;
    color: var(--primary);
}

.hero h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    line-height: 1.4;
}

.hero p {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 16px 36px;
    border-radius: 50px; /* Современная закругленная форма */
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 0.5px;
    border: none;
    outline: none;
    transition: all 0.6s cubic-bezier(0.25, 0.8, 0.25, 1); /* Вдвое медленнее */
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
}

h1, h2, h3, .section-title {
    text-wrap: balance;
}

@keyframes pulse-glow {
    0% { box-shadow: 0 4px 15px rgba(255, 213, 79, 0.15); }
    50% { box-shadow: 0 4px 25px rgba(255, 213, 79, 0.35), 0 0 10px rgba(255, 213, 79, 0.2); }
    100% { box-shadow: 0 4px 15px rgba(255, 213, 79, 0.15); }
}

.btn-primary {
    background-color: var(--primary);
    border: 1px solid var(--primary);
    color: var(--btn-text);
    box-shadow: 0 4px 15px rgba(255, 184, 0, 0.3);
    animation: pulse-glow 6s infinite ease-in-out;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px) scale(1.02);
    border: 1px solid var(--primary-hover);
    box-shadow: 0 8px 25px rgba(255, 184, 0, 0.5);
    animation: none; /* Останавливаем пульсацию при наведении */
}

/* Исключение для кнопок на главном экране (фон всегда темный) */
.hero .btn-primary {
    color: var(--btn-text) !important;
    text-shadow: none;
}
.hero .btn-outline {
    color: #FFFFFF !important;
    border-color: #FFFFFF;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}
.hero .btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.btn-whatsapp {
    background-color: var(--whatsapp);
    border: 1px solid var(--whatsapp);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

.btn-whatsapp:hover {
    background-color: var(--whatsapp-hover);
    transform: translateY(-3px) scale(1.02);
    border: 1px solid var(--whatsapp-hover);
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.5);
}

.btn-telegram {
    background-color: #2AABEE;
    border: 1px solid #2AABEE;
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(42, 171, 238, 0.3);
}

.btn-telegram:hover {
    background-color: #229ED9;
    transform: translateY(-3px) scale(1.02);
    border: 1px solid #229ED9;
    box-shadow: 0 8px 25px rgba(42, 171, 238, 0.5);
}

.btn-max {
    background-color: var(--max-color);
    border: 1px solid var(--max-color);
    color: #FFFFFF;
    box-shadow: 0 4px 15px rgba(41, 98, 255, 0.3);
}

.btn-max:hover {
    background-color: var(--max-hover);
    transform: translateY(-3px) scale(1.02);
    border: 1px solid var(--max-hover);
    box-shadow: 0 8px 25px rgba(41, 98, 255, 0.5);
}

.btn-matte-light {
    background-color: transparent;
    border: 2px solid #FFFFFF;
    color: #FFFFFF !important;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.btn-matte-light:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px) scale(1.02);
    border: 2px solid #FFFFFF;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Общие стили секций */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 800;
    margin-bottom: 50px;
    color: var(--dark);
}

/* Преимущества (Advantages) */
.advantages {
    background: radial-gradient(circle at 100% 0%, rgba(255, 184, 0, 0.15) 0%, transparent 70%),
                radial-gradient(circle at 0% 100%, rgba(41, 98, 255, 0.1) 0%, transparent 70%),
                var(--light-bg);
}

[data-theme="dark"] .advantages {
    background: radial-gradient(circle at 100% 0%, rgba(255, 184, 0, 0.15) 0%, transparent 70%),
                radial-gradient(circle at 0% 100%, rgba(41, 98, 255, 0.1) 0%, transparent 70%),
                var(--light-bg);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}


@media (min-width: 992px) {
    .advantages-grid {
        align-items: center;
    }
    .advantages-grid .plan-card {
        margin-top: -40px; /* Приподнимаем центральную карточку примерно на 10% */
        margin-bottom: 40px; /* Компенсируем сдвиг, чтобы сетка не искажалась */
    }
}

.adv-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    transition: translate 0.3s ease, box-shadow 0.3s ease;
}

.adv-card:hover {
    translate: 0 -5px;
}

.adv-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.adv-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--dark);
}

.adv-card p {
    color: var(--text-muted);
    font-size: 15px;
}

/* Специальная карточка с фоном-чертежом */
.plan-card {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 250px;
}

.plan-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('plan-bg.webp') center/cover no-repeat;
    z-index: 0;
}

.plan-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.85); /* Белая полупрозрачная пелена */
    z-index: 1;
    transition: background 0.8s ease;
}

[data-theme="dark"] .plan-card::after {
    background: rgba(18, 18, 18, 0.85); /* Темная пелена в темной теме */
}

.plan-card h3, .plan-card p {
    position: relative;
    z-index: 2;
}

/* Специальная карточка с фоном-опрессовкой */
.reliable-card {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 250px;
}

.reliable-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('opresovka-bg.webp') center/cover no-repeat;
    z-index: 0;
}

.reliable-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.85); /* Белая полупрозрачная пелена */
    z-index: 1;
    transition: background 0.8s ease;
}

[data-theme="dark"] .reliable-card::after {
    background: rgba(18, 18, 18, 0.85); /* Темная пелена в темной теме */
}

.reliable-card h3, .reliable-card p {
    position: relative;
    z-index: 2;
}

/* Специальная карточка с фоном-монтажом */
.fast-card {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 250px;
}

.fast-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('fast-bg.webp') center/cover no-repeat;
    z-index: 0;
}

.fast-card::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(255, 255, 255, 0.85); /* Белая полупрозрачная пелена */
    z-index: 1;
    transition: background 0.8s ease;
}

[data-theme="dark"] .fast-card::after {
    background: rgba(18, 18, 18, 0.85); /* Темная пелена в темной теме */
}

.fast-card h3, .fast-card p {
    position: relative;
    z-index: 2;
}

/* Услуги и цены */
.services-list {
    max-width: 800px;
    margin: 0 auto;
    background: transparent;
    border: 1px solid var(--primary);
    border-radius: 12px;
    box-shadow: none;
    overflow: hidden;
}

[data-theme="dark"] .services-list {
    border: 1px solid var(--primary);
}

.service-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 30px;
    transition: background-color 0.6s ease;
    border-bottom: 1px solid rgba(128, 128, 128, 0.2);
}

.service-item:last-child {
    border-bottom: none;
}

.service-item:hover {
    background-color: rgba(128, 128, 128, 0.1);
}

.service-name-wrap {
    flex: 1;
    overflow: hidden;
    padding: 5px 0;
}

.service-name {
    font-weight: 600;
    font-size: 16px;
    opacity: 0;
    transform: translateX(-50px);
}

.service-prices-wrap {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-left: 20px;
}

.price-competitor {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 16px;
    position: relative;
    opacity: 0;
    transform: translateX(50px);
}

.price-competitor::after {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: var(--line-width, 0%);
    height: 2px;
    background-color: red;
    transform: translateY(-50%);
}

.price-ours {
    font-weight: 800;
    color: red;
    font-size: 18px;
    white-space: nowrap;
    opacity: 0;
    transform: scale(0.8);
}

.discount-explanation {
    text-align: center;
    margin-top: 30px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    opacity: 0;
    transform: translateY(20px);
    background-color: var(--light-bg);
    padding: 15px 20px;
    border-radius: 8px;
    border: 1px solid rgba(128, 128, 128, 0.2);
    position: relative;
    z-index: 2;
}

.services-disclaimer {
    text-align: center;
    margin-top: 15px;
    color: var(--text-muted);
    font-size: 14px;
    opacity: 0;
    transform: translateY(20px);
    background-color: var(--light-bg);
    padding: 12px 20px;
    border-radius: 8px;
    border: 1px solid rgba(128, 128, 128, 0.2);
    position: relative;
    z-index: 2;
}

/* Отзывы (Мессенджеры) */
.reviews {
    background-color: var(--light-bg);
}

.chat-container {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.chat-message {
    padding: 15px 20px;
    border-radius: 16px;
    position: relative;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.tg-message {
    background-color: var(--telegram-bg);
    border-bottom-left-radius: 4px;
    align-self: flex-start;
    width: 85%;
}

.wa-message {
    background-color: var(--whatsapp-bg);
    border-bottom-right-radius: 4px;
    align-self: flex-end;
    width: 85%;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
}

.chat-name {
    font-weight: 700;
    color: #386a92;
}

.wa-message .chat-name {
    color: #075E54;
}

.chat-time {
    color: #999;
    font-size: 12px;
}

.chat-text {
    font-size: 15px;
    line-height: 1.5;
}

/* Подвал (Footer) */
.footer {
    background-color: var(--footer-bg);
    color: #FFFFFF;
    padding: 60px 0 20px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 40px;
    margin-bottom: 40px;
}

.footer .logo {
    color: #FFFFFF;
    margin-bottom: 20px;
}

.footer-info p {
    color: #aaa;
}

.footer-contacts h3 {
    margin-bottom: 20px;
    font-size: 20px;
}

.footer-contacts p {
    margin-bottom: 10px;
    color: #ccc;
}

.footer-contacts a {
    color: var(--primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #777;
    font-size: 14px;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--text-main);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.btn-outline:hover {
    background-color: var(--primary);
    color: var(--btn-text);
    transform: translateY(-3px) scale(1.02);
    border: 2px solid var(--primary);
}

.btn-header {
    padding: 8px 16px;
    font-size: 13px;
    margin-left: 10px;
    margin-right: 10px;
    white-space: nowrap;
    animation: none;
}

.mobile-menu-btn {
    display: block;
    visibility: hidden;
    font-size: 24px;
    cursor: pointer;
    user-select: none;
    padding: 0 10px;
}

.burger-dropdown {
    display: none;
    position: absolute;
    top: 50px;
    right: 0;
    width: max-content;
    min-width: 200px;
    background-color: var(--white);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    border-radius: 8px;
    flex-direction: column;
    padding: 10px 0;
    z-index: 1000;
}

.burger-dropdown.active {
    display: flex;
}

.burger-dropdown a {
    padding: 12px 20px;
    font-size: 14px;
    font-weight: 600;
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: background 0.3s, color 0.3s;
}

.burger-dropdown a:hover {
    background: rgba(0,0,0,0.02);
    color: var(--primary);
}

.burger-dropdown a.active {
    color: var(--primary);
    background: rgba(0,0,0,0.02);
}

.burger-dropdown a:last-child {
    border-bottom: none;
}

[data-theme="dark"] .burger-dropdown {
    background-color: #2a2a2a;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
}

[data-theme="dark"] .burger-dropdown a {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

[data-theme="dark"] .burger-dropdown a:hover {
    background: rgba(255,255,255,0.05);
}

[data-theme="dark"] .burger-dropdown a.active {
    background: rgba(255,255,255,0.05);
}

/* На совсем узких экранах скрываем кнопку заявки из шапки, чтобы не было тесно */
@media (max-width: 480px) {
    .btn-header {
        display: none;
    }
}

/* Адаптив (Mobile) */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero h2 {
        font-size: 18px;
    }

    .section-title {
        font-size: 28px;
    }

    .service-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .service-prices-wrap {
        margin-left: 0;
    }
    
    .chat-message {
        width: 100%;
    }
}

/* Модальное окно */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.6s ease, visibility 0.6s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid rgba(255, 255, 255, 0.5);
    padding: 40px;
    border-radius: 20px;
    width: 90%;
    max-width: 500px;
    position: relative;
    transform: translateY(-20px) scale(0.95);
    transition: transform 0.8s cubic-bezier(0.25, 0.8, 0.25, 1), background-color 1s ease;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .modal-content {
    background-color: rgba(30, 30, 30, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
}

.modal-overlay.active .modal-content {
    transform: translateY(0) scale(1);
}

.modal-close {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 30px;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
    transition: color 0.2s;
}

.modal-close:hover {
    color: var(--text-main);
}

.modal-content h3 {
    margin-bottom: 25px;
    font-size: 24px;
    color: var(--dark);
    text-align: center;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 14px;
    color: var(--text-main);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-family: inherit;
    font-size: 15px;
    background-color: var(--light-bg);
    color: var(--text-main);
    transition: border-color 0.3s, background-color 0.5s ease, color 0.5s ease;
}

[data-theme="dark"] .form-group input,
[data-theme="dark"] .form-group textarea {
    border-color: #444;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.btn-submit {
    width: 100%;
    margin-top: 10px;
    border: none;
    font-size: 16px;
    padding: 16px;
}

/* View Transitions для смены темы */
html.theme-in-transition,
html.theme-in-transition * {
    transition: none !important;
}

::view-transition-old(root),
::view-transition-new(root) {
    animation: none;
    mix-blend-mode: normal;
}





html.transition-to-light::view-transition-old(root) {
    z-index: 2;
}

html.transition-to-light::view-transition-new(root) {
    z-index: 1;
}

/* Отключение анимаций для пользователей, которые их не любят (Accessibility) */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* =========================================
   FIXY: MOBILE HORIZONTAL SCROLL PREVENTION
   ========================================= */
html, body {
    max-width: 100vw;
    overflow-x: hidden;
    position: relative;
}

.advantages, .services, .reviews {
    overflow: hidden;
    position: relative;
}

/* =========================================
   WARNING TAPE (ANIMATED STRIPES)
   ========================================= */
@keyframes slide-stripes {
    0% { background-position: 0 0; }
    100% { background-position: 80px 0; }
}

.drag-drop-warning {
    position: relative;
    background-color: rgba(255, 136, 0, 0.05) !important;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 140, 0, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 140, 0, 0.2) 50%,
        rgba(255, 140, 0, 0.2) 75%,
        transparent 75%,
        transparent 100%
    ) !important;
    background-size: 80px 80px !important;
    border: 2px dashed rgba(255, 165, 0, 0.6) !important;
    animation: slide-stripes 2s linear infinite;
}

.drag-drop-warning:hover, .drag-drop-warning.drag-over {
    background-color: rgba(255, 136, 0, 0.1) !important;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 140, 0, 0.3) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 140, 0, 0.3) 50%,
        rgba(255, 140, 0, 0.3) 75%,
        transparent 75%,
        transparent 100%
    ) !important;
    border: 2px dashed rgba(255, 165, 0, 0.8) !important;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
    text-align: left;
    margin-left: 15px;
}
.checkbox-group input[type="checkbox"] {
    width: auto;
    padding: 0;
    margin-top: 3px;
    cursor: pointer;
    accent-color: var(--primary);
}
.checkbox-group label {
    font-weight: 400;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 0;
    cursor: pointer;
    line-height: 1.4;
}

/* =========================================
   ANIMATED BG WRAPPER
   ========================================= */
.animated-bg-wrapper {
    position: relative;
    overflow: hidden;
    background: var(--light-bg);
}

.animated-bg-wrapper::before {
    content: '';
    position: absolute;
    top: -800px;
    left: -800px;
    width: 1600px;
    height: 1600px;
    background: radial-gradient(circle, rgba(255, 184, 0, 0.4) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    transform: translate(var(--mouse-x, 800px), var(--mouse-y, 400px));
    transition: transform 1.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    will-change: transform;
}

[data-theme="dark"] .animated-bg-wrapper::before {
    background: radial-gradient(circle, rgba(255, 184, 0, 0.6) 0%, transparent 50%);
}

.calculator-section, .services {
    position: relative;
    z-index: 1;
    background: transparent;
}

.calc-wrapper {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 30px;
    background: transparent;
    padding: 30px;
    border-radius: 20px;
    border: 1px solid var(--primary);
    box-shadow: none;
}
[data-theme="dark"] .calc-wrapper {
    background: transparent;
    border: 1px solid var(--primary);
}
.calc-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    align-items: start;
}
.calc-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.calc-group-title {
    font-weight: 700;
    font-size: 15px;
    color: var(--dark);
    margin-bottom: 0;
}
/* Sliders */
.calc-slider-wrap {
    display: flex;
    align-items: center;
    gap: 15px;
}
.calc-slider-wrap input[type="range"] {
    flex: 1;
    -webkit-appearance: none;
    height: 6px;
    background: linear-gradient(to right, var(--primary) var(--value, 50%), #e0e0e0 var(--value, 50%));
    border-radius: 3px;
    outline: none;
}
[data-theme="dark"] .calc-slider-wrap input[type="range"] {
    background: linear-gradient(to right, var(--primary) var(--value, 50%), #444 var(--value, 50%));
}
.calc-slider-wrap input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}
.calc-val-box {
    background: var(--light-bg);
    padding: 5px 12px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 15px;
    min-width: 70px;
    text-align: center;
    color: var(--text-main);
    border: 1px solid rgba(128,128,128,0.2);
}
/* Radio Cards */
.calc-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(115px, 1fr));
    gap: 8px;
}
.calc-card-lbl {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 10px;
    background: var(--light-bg);
    border: 2px solid transparent;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    color: var(--text-muted);
}
[data-theme="dark"] .calc-card-lbl {
    background: #2a2a2a;
}
.calc-card-lbl svg {
    margin-bottom: 0;
    width: 32px;
    height: 32px;
    stroke: currentColor;
    fill: none;
    flex-shrink: 0;
}
.calc-cards input[type="radio"] {
    display: none;
}
.calc-cards input[type="radio"]:checked + .calc-card-lbl {
    border-color: var(--primary);
    background: rgba(255, 184, 0, 0.1);
    color: var(--text-main);
}
[data-theme="dark"] .calc-cards input[type="radio"]:checked + .calc-card-lbl {
    background: rgba(255, 184, 0, 0.15);
}
.calc-cards input[type="radio"]:checked + .calc-card-lbl svg {
    stroke: var(--primary);
}
.calc-card-lbl span {
    font-size: 13px;
    font-weight: 600;
    line-height: 1.2;
}
/* Result Block */
.calc-result {
    background: transparent;
    padding: 25px;
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    border: 1px solid rgba(128, 128, 128, 0.2);
}
[data-theme="dark"] .calc-result {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.calc-result-title {
    font-size: 16px;
    color: var(--text-main);
    margin-bottom: 15px;
}
.calc-total {
    font-size: 38px;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 10px;
    line-height: 1;
}
.calc-breakdown {
    font-size: 13px;
    color: var(--text-main);
    margin-bottom: 25px;
    padding: 12px 15px;
    border-radius: 0 8px 8px 0;
    background-color: var(--light-bg);
    border-top: 1px solid rgba(128, 128, 128, 0.1);
    border-right: 1px solid rgba(128, 128, 128, 0.1);
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    border-left: 3px solid var(--primary);
}
.calc-breakdown div {
    margin-bottom: 4px;
}
.calc-breakdown div:last-child {
    margin-bottom: 0;
}
.calc-level-disclaimer {
    margin-top: 25px;
    padding: 15px;
    border-left: 3px solid var(--primary);
    background-color: var(--light-bg);
    border-top: 1px solid rgba(128, 128, 128, 0.1);
    border-right: 1px solid rgba(128, 128, 128, 0.1);
    border-bottom: 1px solid rgba(128, 128, 128, 0.1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    font-size: 0.85em;
    color: var(--text-main);
    line-height: 1.5;
    border-radius: 0 8px 8px 0;
    transition: all 0.3s ease;
}
.calc-result-btns {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.calc-result-btns .btn {
    width: 100%;
    padding: 14px;
    font-size: 14px;
}

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

/* Новые элементы калькулятора */
.calc-checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
    gap: 12px;
}

.calc-checkbox {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95em;
    user-select: none;
    position: relative;
    padding-left: 32px;
}

.calc-checkbox input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.calc-checkbox .checkmark {
    position: absolute;
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    height: 22px;
    width: 22px;
    background-color: var(--bg-hover);
    border-radius: 4px;
    transition: all 0.2s ease;
    border: 1px solid rgba(128,128,128,0.2);
}

.calc-checkbox:hover input ~ .checkmark {
    background-color: var(--bg-main);
    border-color: var(--primary);
}

.calc-checkbox input:checked ~ .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
}

.calc-checkbox .checkmark:after {
    content: "";
    position: absolute;
    display: none;
    left: 7px;
    top: 3px;
    width: 6px;
    height: 12px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.calc-checkbox input:checked ~ .checkmark:after {
    display: block;
}

[data-theme="dark"] .calc-checkbox input:checked ~ .checkmark:after {
    border-color: #121212;
}

.calc-select-wrap {
    position: relative;
    width: 100%;
}

.calc-select-wrap select {
    width: 100%;
    padding: 15px;
    background: var(--bg-card);
    border: 1px solid rgba(128,128,128,0.2);
    border-radius: 12px;
    font-family: inherit;
    font-size: 1em;
    color: var(--text-main);
    appearance: none;
    outline: none;
    cursor: pointer;
    transition: border-color 0.3s ease;
}

.calc-select-wrap select:focus {
    border-color: var(--primary);
}

.calc-select-wrap .select-arrow {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    fill: none;
    stroke: var(--text-muted);
    pointer-events: none;
}

/* -------------------------------------------
   ������������� ������ ������� (�����/����)
------------------------------------------- */
.nav-scroll-btn {
    position: fixed;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    border: none;
    cursor: pointer;
    z-index: 1001;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.2s ease, background-color 0.3s ease;
}

.nav-scroll-btn:hover {
    transform: scale(1.1);
    background-color: var(--primary-hover);
}

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

.nav-scroll-btn svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    fill: none;
}

/* ������ ������ */
.scroll-up {
    top: 20px; /* ������ ��� ������ ������ */
}

/* ������ ���� */
.scroll-down {
    bottom: 20px;
}

/* �� ��������� ����������� �������� ������ ����, ����� �� ����������� Telegram-������ */
@media (max-width: 768px) {
    .scroll-down {
        bottom: 85px; 
    }
    .scroll-up {
        top: 100px;
    }
}


/* ==========================================================================
   Toast Notifications
   ========================================================================== */
#toast-container {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast-notification {
    display: flex;
    align-items: center;
    background: var(--white);
    color: var(--text-main);
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    pointer-events: auto;
    cursor: pointer;
    transform: translateX(120%);
    opacity: 0;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.4s ease;
    max-width: 350px;
    border-left: 5px solid transparent;
}

.toast-notification.show {
    transform: translateX(0);
    opacity: 1;
}

.toast-notification.hide {
    transform: translateX(120%);
    opacity: 0;
}

.toast-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    margin-right: 15px;
    color: #fff;
    font-weight: bold;
    flex-shrink: 0;
}

.toast-message {
    font-size: 0.95em;
    line-height: 1.4;
}

.toast-success {
    border-left-color: #4CAF50;
}
.toast-success .toast-icon {
    background: #4CAF50;
}

.toast-error {
    border-left-color: #F44336;
}
.toast-error .toast-icon {
    background: #F44336;
}

@media (max-width: 768px) {
    #toast-container {
        bottom: 20px;
        right: 20px;
        left: 20px;
    }
    .toast-notification {
        max-width: 100%;
    }
}

/* ������ +/- � ������������ */
.calc-qty-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 1px solid var(--text-muted);
    background: transparent;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
    opacity: 0.8;
}
.calc-qty-btn:hover {
    background: rgba(255, 184, 0, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    opacity: 1;
}
.calc-qty-btn:active {
    transform: scale(0.95);
}
.calc-card-lbl .calc-qty-btn svg {
    width: 14px;
    height: 14px;
    margin: 0;
    stroke-width: 2.5;
    stroke: currentColor;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}