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

/* ====== НАСТОЯЩИЙ ЕВРОПЕЙСКИЙ ПРОМЫШЛЕННЫЙ МИНИМАЛИЗМ (СТАТУСНЫЙ ДИЗАЙН) ====== */
:root {
    --bg-main: #0F1115;
    --bg-surface: #171A21;
    --bg-surface-hover: #1E222B;
    --border-color: #262B36;
    --text-primary: #ECEFF4;
    --text-secondary: #8B949E;
    --accent-orange: #E32626; /* Фирменный промышленный красный SANY / SEER */
    --accent-orange-hover: #C21B1B;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-md: 8px;
    --radius-sm: 6px;
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.25);
    --transition: all 0.2s ease-in-out;
}

body.light-theme {
    --bg-main: #F6F8FA;
    --bg-surface: #FFFFFF;
    --bg-surface-hover: #F8F9FB;
    --border-color: #D0D7DE;
    --text-primary: #1F2328;
    --text-secondary: #656E7B;
    --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    width: 100%;
    max-width: 100%;
    overflow-x: hidden;
    position: relative;
}

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

button, input, select {
    font-family: inherit;
    border: none;
    outline: none;
}

/* ====== НАВИГАЦИЯ ====== */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    height: 70px;
    background: rgba(15, 17, 21, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6%;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.brand-orange {
    color: var(--accent-orange);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.nav-controls {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-switch {
    display: flex;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.lang-btn {
    padding: 6px 14px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
}

.lang-btn.active {
    background: var(--accent-orange);
    color: #FFF;
}

.theme-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

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

.btn-phone {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-phone:hover {
    border-color: var(--accent-orange);
}

/* ====== ГЛАВНЫЙ ЭКРАН (HERO) ====== */
.hero {
    padding: 80px 6% 90px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: 60px;
    border-bottom: 1px solid var(--border-color);
    max-width: 1600px;
    margin: 0 auto;
}

.hero-content h1 {
    font-size: 2.8rem;
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.8px;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-content p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 36px;
    max-width: 580px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.btn-primary {
    background: var(--accent-orange);
    color: #FFFFFF;
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--accent-orange-hover);
}

.btn-secondary {
    background: var(--bg-surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 14px 28px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.hero-visual {
    width: 100%;
    display: flex;
    justify-content: flex-end;
}

.hero-img {
    width: 100%;
    max-width: 620px;
    height: 400px;
    object-fit: cover;
    object-position: center 30%;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

/* ====== КАЛЬКУЛЯТОР ====== */
.calculator-section {
    padding: 60px 6%;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
}

.calc-box {
    max-width: 1100px;
    margin: 0 auto;
}

.calc-title {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.calc-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 28px;
}

.calc-form {
    display: grid;
    grid-template-columns: 1.2fr 1fr auto;
    gap: 20px;
    align-items: flex-end;
    background: var(--bg-main);
    padding: 24px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-control {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
}

.form-control:focus {
    border-color: var(--accent-orange);
}

.calc-result-box {
    margin-top: 24px;
    padding: 24px;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: none;
}

.calc-result-box.active {
    display: block;
}

/* ====== КАТАЛОГ ====== */
.catalog-section {
    padding: 60px 6% 90px;
    max-width: 1600px;
    margin: 0 auto;
}

.catalog-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    margin-bottom: 36px;
    flex-wrap: wrap;
}

.filter-tabs {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 9px 18px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.filter-tab:hover {
    color: var(--text-primary);
}

.filter-tab.active {
    background: var(--accent-orange);
    color: #FFF;
    border-color: var(--accent-orange);
}

.search-box {
    flex-grow: 1;
    max-width: 400px;
    position: relative;
}

.search-input {
    width: 100%;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.9rem;
}

.search-input:focus {
    border-color: var(--text-secondary);
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.card:hover {
    border-color: var(--text-secondary);
    box-shadow: var(--shadow-sm);
}

.card-img-box {
    width: 100%;
    height: 220px;
    background: #0C0D11;
    position: relative;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
}

.card-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: #0C0D11;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 4px 8px;
    border-radius: 4px;
}

.card-body {
    padding: 22px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.card-specs {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
    font-size: 0.88rem;
    color: var(--text-secondary);
}

.spec-item {
    display: flex;
    justify-content: space-between;
}

.spec-item span:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

.card-action {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.btn-card-order {
    width: 100%;
    background: var(--bg-main);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 11px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.btn-card-order:hover {
    background: var(--accent-orange);
    color: #FFF;
    border-color: var(--accent-orange);
}

/* ====== УСЛУГИ ====== */
.advantages-section {
    padding: 60px 6%;
    background: var(--bg-surface);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.adv-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 36px;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

.adv-card {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    padding: 28px;
    border-radius: var(--radius-md);
}

.adv-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.adv-card p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.6;
}

/* ====== МОДАЛЬНОЕ ОКНО ====== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.75);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
    padding: 20px;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    width: 100%;
    max-width: 680px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 32px;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 1.3rem;
    color: var(--text-secondary);
    cursor: pointer;
    background: none;
    border: none;
}

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

.modal-main-img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
    background: #000;
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.modal-specs-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    background: var(--bg-main);
    padding: 20px;
    border-radius: var(--radius-sm);
    margin: 20px 0 28px;
    border: 1px solid var(--border-color);
}

.modal-spec-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.modal-spec-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.modal-spec-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
}

.btn-telegram-order {
    background: #0088CC;
    color: #FFF;
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    transition: var(--transition);
}

.btn-telegram-order:hover {
    background: #0075B0;
}

/* ====== FOOTER ====== */
footer {
    padding: 40px 6%;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.88rem;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ====== ПРОФЕССИОНАЛЬНАЯ АДАПТИВНАЯ ВЕРСТКА (RESPONSIVE & MOBILE DESIGN) ====== */

/* 1. Планшетов и небольших ноутбуков (< 1024px) */
@media (max-width: 1024px) {
    .navbar, .hero, .calculator-section, .catalog-section, .advantages-section, footer {
        padding-left: 4%;
        padding-right: 4%;
    }
    .hero {
        gap: 30px;
        padding-top: 60px;
        padding-bottom: 70px;
    }
    .hero-content h1 {
        font-size: 2.3rem;
    }
    .hero-img {
        height: 340px;
    }
    .grid-container {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 20px;
    }
}

/* 2. Планшетов в портретном режиме и больших смартфонов (< 850px) */
@media (max-width: 850px) {
    .nav-links {
        display: none; /* Очищаем верхнее меню для легкой навигации */
    }
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
        padding-top: 50px;
    }
    .hero-content p {
        margin-left: auto;
        margin-right: auto;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-visual {
        justify-content: center;
    }
    .calc-form, .adv-grid, .modal-specs-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .modal-content {
        width: 94%;
        max-width: 94%;
        padding: 24px 20px;
    }
    .modal-main-img {
        height: 260px;
    }
}

/* 3. Мобильных телефонов и компактных экранов (< 580px) */
@media (max-width: 580px) {
    .navbar {
        height: auto;
        min-height: 64px;
        padding: 10px 16px;
        flex-wrap: wrap;
        gap: 12px;
    }
    .nav-brand {
        font-size: 1.15rem;
    }
    .nav-controls {
        gap: 10px;
    }
    .lang-btn {
        padding: 5px 10px;
        font-size: 0.8rem;
    }
    .btn-phone {
        padding: 6px 12px;
        font-size: 0.85rem;
    }
    
    .hero {
        padding: 36px 16px 50px;
        gap: 28px;
    }
    .hero-content h1 {
        font-size: 1.75rem;
        line-height: 1.22;
        letter-spacing: -0.5px;
        margin-bottom: 16px;
    }
    .hero-content p {
        font-size: 0.95rem;
        margin-bottom: 24px;
    }
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        gap: 12px;
    }
    .btn-primary, .btn-secondary {
        width: 100%;
        text-align: center;
        padding: 14px;
        font-size: 1rem;
    }
    .hero-img {
        height: 220px;
        border-radius: 8px;
    }
    
    .calculator-section, .catalog-section, .advantages-section {
        padding: 40px 16px 50px;
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
        box-sizing: border-box;
    }
    .section-title {
        font-size: 1.55rem;
        margin-bottom: 24px;
        text-align: center;
    }
    .calc-box {
        padding: 20px 16px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    .form-control {
        padding: 12px;
        font-size: 16px; /* Запрещает авто-зум на iOS при фокусе в input */
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    
    .catalog-toolbar {
        width: 100%;
        max-width: 100%;
        min-width: 0; /* КЛЮЧЕВОЙ ФИКС: запрещает раздвигать страницу шире экрана телефона */
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
        margin-bottom: 24px;
        overflow: hidden;
    }
    /* Плавный горизонтальный свайп табов фильтров внутри границ экрана */
    .filter-tabs {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 6px;
        scrollbar-width: none;
    }
    .filter-tabs::-webkit-scrollbar {
        display: none;
    }
    .filter-tab {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 8px 16px;
        font-size: 0.85rem;
    }
    
    /* Сетка в одну широкую колонку с аккуратными карточками */
    .grid-container {
        width: 100%;
        max-width: 100%;
        min-width: 0;
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .card-img-box {
        height: 210px;
    }
    .card-title {
        font-size: 1.1rem;
    }
    
    .modal-content {
        padding: 20px 14px;
        max-height: 92vh;
        width: 96%;
        border-radius: 12px;
    }
    .modal-main-img {
        height: 200px;
        margin-bottom: 14px;
    }
    .modal-title {
        font-size: 1.25rem;
    }
    .modal-specs-grid {
        padding: 12px;
        gap: 12px;
        margin: 14px 0 20px;
    }
    .btn-telegram-order {
        font-size: 0.9rem;
        padding: 12px 10px;
    }
    
    footer {
        padding: 32px 16px;
        gap: 16px;
    }
    footer div {
        flex-direction: column;
        gap: 10px !important;
    }
}