/* ===== CSS ПЕРЕМЕННЫЕ ===== */
:root {
    --bg-primary: #0b0d10;
    --bg-secondary: #141619;
    --bg-card: rgba(20, 22, 25, 0.8);
    --text-primary: #ffffff;
    --text-secondary: #a0a3a8;
    --border-color: #282a2e;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-glow: rgba(59, 130, 246, 0.3);
    --nav-bg: rgba(11, 13, 16, 0.8);
    --footer-bg: #0b0d10;
    --hero-gradient: radial-gradient(circle at 30% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 60%),
                    radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
                    linear-gradient(135deg, #0b0d10 0%, #1a1d23 100%);
    --input-bg: #1e2025;
    --shadow-color: rgba(0, 0, 0, 0.5);
    --glow-color: rgba(59, 130, 246, 0.3);
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-primary: #f9fafc;
        --bg-secondary: #ffffff;
        --bg-card: rgba(255, 255, 255, 0.8);
        --text-primary: #111827;
        --text-secondary: #4b5563;
        --border-color: #e5e7eb;
        --accent-primary: #2563eb;
        --accent-secondary: #7c3aed;
        --accent-glow: rgba(37, 99, 235, 0.2);
        --nav-bg: rgba(255, 255, 255, 0.8);
        --footer-bg: #f3f4f6;
        --hero-gradient: radial-gradient(circle at 30% 30%, rgba(37, 99, 235, 0.1) 0%, transparent 60%),
                          radial-gradient(circle at 80% 70%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
                          linear-gradient(135deg, #f0f4ff 0%, #ffffff 100%);
        --input-bg: #ffffff;
        --shadow-color: rgba(0, 0, 0, 0.05);
        --glow-color: rgba(37, 99, 235, 0.2);
    }
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

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

ul {
    list-style: none;
}

h1, h2, h3, .logo, .nav-links a, .btn {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 500;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1.1;
    font-weight: 600;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 2rem;
    text-align: center;
    font-weight: 500;
}

h2 .gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section {
    padding: 80px 0;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== НАВИГАЦИЯ ===== */
.navbar {
    position: sticky;
    top: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 16px 0;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    font-size: 0.95rem;
    font-weight: 500;
    text-transform: uppercase;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: 0.3s;
    color: var(--text-secondary);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

.burger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
}

.burger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: 0.3s;
}

/* ===== КНОПКИ ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 32px;
    background: transparent;
    border: 1px solid var(--accent-primary);
    color: var(--accent-primary);
    font-weight: 500;
    text-transform: uppercase;
    transition: 0.3s;
    cursor: pointer;
    border-radius: 40px;
    font-size: 0.95rem;
}

.btn:hover {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 8px 20px var(--accent-glow);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    border: none;
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--accent-secondary), var(--accent-primary));
}

/* ===== HERO ===== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    background: var(--hero-gradient);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-bg.jpg') center/cover no-repeat;
    opacity: 0.08;
    z-index: 0;
}

.hero .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero h1 {
    margin-bottom: 24px;
}

.hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 40px;
    color: var(--text-secondary);
}

.hero .btn {
    margin: 0 8px;
}

/* ===== ПРЕИМУЩЕСТВА ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.feature-card {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: 32px 24px;
    border-radius: 24px;
    border: 1px solid var(--border-color);
    transition: 0.3s;
}

.feature-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px var(--glow-color);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-card h3 {
    margin-bottom: 12px;
    font-size: 1.3rem;
}

.feature-card p {
    color: var(--text-secondary);
}

/* ===== ПОРТФОЛИО ===== */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.portfolio-item {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: 0.3s;
    width: 100%;
    max-width: 350px;
    margin: 0 auto;
}

.portfolio-item:hover {
    transform: scale(1.02);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px var(--glow-color);
}

.portfolio-image {
    width: 100%;
    height: 260px;
    object-fit: cover;
    object-position: center;
    aspect-ratio: 1 / 1; /* Делает изображение идеально квадратным */
    background: #1e2025;
    transition: transform 0.5s;
    display: block;
}

.portfolio-item:hover .portfolio-image {
    transform: scale(1.05);
}

.portfolio-info {
    padding: 20px;
}

.portfolio-info h3 {
    margin-bottom: 8px;
    font-size: 1.2rem;
}

.portfolio-info p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ===== ОБОРУДОВАНИЕ ===== */
.equipment-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin: 40px 0;
}

.equipment-image {
    border-radius: 24px;
    overflow: hidden;
    border: 2px solid var(--accent-primary);
    box-shadow: 0 20px 40px var(--glow-color);
}

.equipment-image img {
    width: 100%;
    height: auto;
    display: block;
}

.equipment-specs {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: 32px;
    border-radius: 24px;
    border-left: 4px solid var(--accent-primary);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
    gap: 10px;
    flex-wrap: wrap;
}

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

.spec-label {
    color: var(--accent-primary);
    font-weight: 500;
}

/* ===== КАЛЬКУЛЯТОР ===== */
.calculator {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    border-radius: 32px;
    padding: 48px;
    max-width: 900px;
    margin: 0 auto;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px var(--shadow-color);
}

.elements-section {
    margin: 30px 0;
}

.element-card {
    background: var(--bg-secondary);
    border-radius: 24px;
    padding: 24px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    position: relative;
}

.element-card h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--accent-primary);
}

.element-fields {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 15px;
}

.field-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.field-group label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.field-group input,
.field-group select {
    padding: 12px 15px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 60px;
    font-size: 0.95rem;
    width: 100%;
}

.element-remove {
    position: absolute;
    top: 20px;
    right: 20px;
}

.btn-remove {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid #ff4d4d;
    color: #ff4d4d;
    font-size: 1.2rem;
    cursor: pointer;
    transition: 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-remove:hover {
    background: #ff4d4d;
    color: white;
}

.btn-add-element {
    width: 100%;
    margin: 20px 0;
}

.color-changes-info {
    margin: 30px 0 20px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 24px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.color-changes-info .label {
    font-weight: 500;
    color: var(--accent-primary);
}

.color-changes-info .value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-primary);
    background: var(--bg-card);
    padding: 5px 15px;
    border-radius: 40px;
    border: 1px solid var(--border-color);
}

.result {
    margin-top: 32px;
    padding: 24px;
    background: var(--bg-secondary);
    border-radius: 60px;
    text-align: center;
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--accent-primary);
    border: 1px solid var(--border-color);
}

.result span {
    color: var(--text-primary);
    font-weight: 400;
    font-size: 1rem;
    margin-right: 8px;
}

.price-detail {
    margin-top: 16px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-align: left;
    max-height: 400px;
    overflow-y: auto;
    padding: 10px;
    background: var(--bg-card);
    border-radius: 24px;
}

.order-form {
    background: var(--bg-secondary);
    padding: 24px;
    border-radius: 24px;
    margin-bottom: 20px;
}

.order-form h3 {
    margin-bottom: 20px;
    color: var(--accent-primary);
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: var(--text-secondary);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    background: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 60px;
    font-size: 1rem;
}

/* ===== КОНТАКТЫ ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin: 40px 0;
}

.contact-info {
    background: var(--bg-card);
    backdrop-filter: blur(8px);
    padding: 32px;
    border-radius: 32px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.contact-icon {
    font-size: 2rem;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* ===== ФУТЕР ===== */
.footer {
    background: var(--footer-bg);
    border-top: 1px solid var(--border-color);
    padding: 32px 0;
    text-align: center;
    color: var(--text-secondary);
}

/* ===== АДАПТИВНОСТЬ ===== */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--nav-bg);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: 0.3s;
        gap: 40px;
        z-index: 999;
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .burger {
        display: flex;
    }
    
    .burger.active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }
    
    .burger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .burger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }
    
    .equipment-showcase,
    .contact-grid {
        grid-template-columns: 1fr;
    }

    .calculator {
        padding: 24px;
    }

    .element-fields {
        grid-template-columns: 1fr;
    }

    .element-remove {
        position: static;
        margin-top: 15px;
        display: flex;
        justify-content: flex-end;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .portfolio-item {
        max-width: 100%;
    }
}