.card.form label { display:none; }
.card.form input::placeholder { color: #9aa8bd; }
/* Calculation page - hero and layout */
.section-hero.calc,
.calculation-hero { /* support existing class name */
    background: linear-gradient(180deg, var(--bg-panel), var(--bg-deep));
    color: var(--text-light);
    padding: clamp(72px, 10vw, 104px) 0 80px;
    text-align: center;
}

.section-hero.calc h1,
.calculation-hero h1 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    margin: 0 0 16px;
    letter-spacing: .2px;
}

.calc-grid,
.calculation-content .calc-grid { /* fallback */
    display: grid;
    gap: 32px;
    grid-template-columns: 1fr;
    align-items: start;
}

@media (min-width: 992px) {
    .calc-grid,
    .calculation-content .calc-grid {
        grid-template-columns: 1.1fr 520px; /* текст слева, аккуратная колонка формы справа */
        gap: 40px;
    }
}

.feature-list,
.calculation-benefits ul {
    list-style: none;
    margin: 24px auto 0;
    padding: 0;
    max-width: 1000px;
    margin-inline: 0;
    text-align: left;
}

.feature-list li,
.calculation-benefits li {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    color: var(--text-light);
    padding: 6px 0;
    border-bottom: 1px solid var(--border);
}

.feature-list li:last-child,
.calculation-benefits li:last-child { border-bottom: none; }

.feature-list li::before,
.calculation-benefits li::before {
    content: "✔";
    color: #10b981;
    margin-top: 2px;
}

.card.form,
.calculation-form { /* apply site card style to existing form */
    background: var(--card);
    border-radius: 14px;
    box-shadow: 0 8px 24px rgba(0,0,0,.12);
    padding: 24px;
}

@media (min-width: 992px) {
    .section-hero.calc .card.form { margin-left: auto; max-width: 520px; }
}

.card.form .form-group,
.calculation-form .form-group { margin-bottom: 14px; }

.card.form input,
.card.form textarea,
.card.form select,
.calculation-form input,
.calculation-form textarea,
.calculation-form select {
    width: 100%;
    border: 1px solid #dbe3ef;
    border-radius: 10px;
    background: #f7f9fc;
    color: #1b2a3d;
    padding: 12px 14px;
    transition: border-color var(--transition-normal), box-shadow var(--transition-normal), background-color var(--transition-normal);
}

.card.form input:focus,
.card.form textarea:focus,
.card.form select:focus,
.calculation-form input:focus,
.calculation-form textarea:focus,
.calculation-form select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(47,110,219,.12);
    background: #ffffff;
}

.card.form .btn.btn-primary,
.calculation-form .btn.btn-primary {
    display: inline-block;
    padding: 12px 18px;
    border-radius: 10px;
}

/* Calculation form buttons — better contrast and elevation */
.section-hero.calc .card.form .btn.btn-primary {
    background: var(--color-primary);
    color: #fff;
    border: none;
    box-shadow: 0 6px 16px rgba(42,91,231,.22);
    letter-spacing: .2px;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), background var(--transition-normal);
    width: 100%;
}

.section-hero.calc .card.form .btn.btn-primary:hover {
    background: var(--color-primary-600);
    box-shadow: 0 10px 20px rgba(42,91,231,.26);
}

/* File button inside label */
.section-hero.calc .card.form label.file .btn.btn-primary {
    background: #ffffff;
    color: #1b2a3d;
    border: 1px solid #dbe3ef;
    box-shadow: none;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: auto;
}

.section-hero.calc .card.form label.file .btn.btn-primary::before {
    content: '+';
    display: inline-block;
    width: 18px;
    height: 18px;
    line-height: 18px;
    text-align: center;
    border-radius: 6px;
    background: #eef2f9;
    color: var(--color-primary);
    font-weight: 700;
}

/* Spacing adjustments so buttons не сливаются */
.section-hero.calc .card.form label.file { margin-top: 6px; display: inline-block; }
.section-hero.calc .card.form button[type="submit"] { margin-top: 12px; }

/* На мобильных кнопка на всю ширину */
@media (max-width: 576px) {
    .section-hero.calc .card.form .btn.btn-primary { width: 100%; }
}

.calc-grid { /* page main grid below hero */ }
/* Design System Variables */
:root {
    /* Color Palette */
    --color-bg: #0E1524;
    --color-surface: #121B2F;
    --color-surface-2: #16223A;
    --color-primary: #2A5BE7;
    --color-primary-600: #204BC2;
    --color-gold: #CDAA6C;
    --color-gold-600: #B89458;
    --color-text: #E9EEF6;
    --color-text-muted: #97A4BF;
    --color-border: #23304A;
    --overlay-60: rgba(8,14,26,.6);
    
    /* Typography */
    --font-family: 'Inter', sans-serif;
    --font-size-base: 16px;
    --font-size-h1: 3rem;
    --font-size-h2: 2.5rem;
    --font-size-h3: 2rem;
    --font-size-h4: 1.5rem;
    --font-size-body: 1rem;
    --font-size-small: 0.875rem;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-soft: 0 10px 30px rgba(7,12,22,.35);
    --shadow-medium: 0 4px 20px rgba(7,12,22,.25);
    --shadow-light: 0 2px 8px rgba(7,12,22,.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;

    /* Unified aliases for calculation page */
    --bg-deep: #0E1524;          /* maps to var(--color-bg) */
    --bg-panel: #121B2F;         /* maps to var(--color-surface) */
    --text-light: #E9EEF6;       /* maps to var(--color-text) */
    --muted: #97A4BF;            /* maps to var(--color-text-muted) */
    --gold: var(--color-gold);
    --primary: var(--color-primary);
    --card: #f5f7fb;
    --border: rgba(255,255,255,.08);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    font-weight: 400;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Header */
.header {
    background: rgba(14,21,36,.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-medium);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    position: relative;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    flex-direction: row-reverse; /* текст слева, логотип справа */
}

.css-logo {
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-circle {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    border: 3px solid #ffffff;
}

.logo-text-inner {
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: 1px;
}

.logo-image {
    height: 85px;
    width: 85px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: transparent;
    display: block !important;
    box-shadow: none;
    border: none;
    transition: all var(--transition-normal);
    pointer-events: none;
    cursor: default;
}

.logo-image:hover {
    transform: translateY(-2px);
    box-shadow: none;
}

.logo-text {
    text-decoration: none;
    color: inherit;
}

.logo-text h1 {
    font-size: var(--font-size-h4);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.15rem;
    letter-spacing: 0.2px;
    white-space: nowrap;
}

.logo-text p {
    font-size: var(--font-size-small);
    color: var(--color-text-muted);
    font-weight: 500;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.nav {
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    margin-left: var(--spacing-lg);
}

.nav ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
    flex-wrap: nowrap;
}

.nav a {
    text-decoration: none;
    color: var(--color-text);
    font-weight: 500;
    font-size: var(--font-size-small);
    transition: all var(--transition-normal);
    position: relative;
    padding: var(--spacing-xs) 0;
    letter-spacing: 0.01em;
    white-space: nowrap;
}

.nav a:hover {
    color: var(--color-primary);
    transform: translateY(-1px);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: all var(--transition-normal);
    transform: translateX(-50%);
}

.nav a:hover::after {
    width: 100%;
}

.header-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    position: relative;
    z-index: 2;
    flex-shrink: 0;
    margin-left: auto;
    margin-right: 0;
    right: -12px; /* поджимаем к правому краю */
}

@media (min-width: 1200px) {
    .header-contact { right: -24px; }
}

.header-contact span {
    color: var(--color-text);
    font-size: var(--font-size-small);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-xs);
    border-radius: var(--radius-sm);
    position: relative;
    white-space: nowrap;
}

.header-contact .phone {
    color: var(--color-primary);
    font-weight: 600;
    font-size: var(--font-size-small);
}

/* Убираем hover-эффекты для контактов */

/* Hero Section */
.hero {
    background: none;
    color: #FFFFFF;
    padding-block: clamp(36px, 6vw, 64px);
    text-align: center;
    position: relative;
    min-height: clamp(60vh, 68vh, 72vh);
    display: flex;
    align-items: center;
    justify-content: center;
    isolation: isolate;
    overflow: hidden;
    background-position: center 1%;
    background-size: cover;
}

/* Center inner container so heading, subtitle and button sit perfectly centered */
.hero > .container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* background image layer with slight brightness/contrast boost */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    /* Try multiple possible locations for the new hero image */
    background-image: url('/photo3.jpg'), url('photo3.jpg'), url('photo/photo3.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
    /* Slightly darker for better depth while keeping clarity */
    filter: blur(3px) brightness(0.52) contrast(1.05) saturate(1.06);
    transform: scale(1.03); /* компенсируем края после blur */
    will-change: transform, filter;
    z-index: 0;
}

/* darkening overlay above image, below content */
.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    /* Cool blue/white tint while keeping edges darker for readability */
    background:
        linear-gradient(rgba(30,64,175,0.12), rgba(30,64,175,0.12)),
        radial-gradient(ellipse at center,
            rgba(255,255,255,0.18) 0%,
            rgba(173,216,230,0.25) 40%,
            rgba(23,37,84,0.45) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    gap: clamp(8px, 1.4vw, 14px);
    width: 100%;
    max-width: 960px;
    padding: 0 clamp(16px, 3vw, 28px);
    margin: 0 auto;
    text-shadow: 0 1px 4px rgba(0,0,0,.25);
}

.hero-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: clamp(8px, 1.4vw, 14px);
    transform: translateY(clamp(32px, 5vh, 64px));
}

.hero-content h1 {
    font-size: clamp(32px, 4.5vw, 48px);
    font-weight: 800;
    margin-bottom: clamp(10px, 1.6vw, 14px);
    line-height: 1.15;
    letter-spacing: 0.1px;
    opacity: 1;
    text-align: center;
    width: 100%;
    text-wrap: balance;
}

.subtitle {
    font-size: clamp(16px, 1.9vw, 20px);
    color: rgba(255,255,255,.95);
    margin: 0 auto;
    max-width: 100%;
    opacity: 1;
    line-height: 1.65;
    letter-spacing: 0.1px;
    text-wrap: balance;
    background: rgba(0,0,0,.32);
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 14px;
    padding: clamp(12px,2.4vw,18px) clamp(16px,3vw,24px);
    width: 100%;
}

.hero-key {
    color: #F5D27A;
    font-weight: 600;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    width: 100%;
    margin-top: 0;
}

.hero .cta {
    margin-top: clamp(16px, 2.4vw, 28px);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-normal);
    border: none;
    cursor: pointer;
    font-size: var(--font-size-body);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text);
    box-shadow: var(--shadow-light);
}

.btn-primary:hover {
    background: var(--color-primary-600);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.btn-secondary {
    background: transparent;
    color: var(--color-gold);
    border: 2px solid var(--color-gold);
}

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

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: var(--font-size-h2);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.2px;
    line-height: 1.25;
}

.section-header p {
    font-size: var(--font-size-body);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.35;
}

/* About Section */
.about {
    padding: var(--spacing-lg) 0;
    background: var(--color-surface);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.about-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.info-item h3 {
    font-size: var(--font-size-body);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.info-item p {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.about-description h3 {
    font-size: var(--font-size-h4);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.about-description p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.about-description ul {
    list-style: none;
    margin-bottom: 1rem;
}

.about-description li {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-md);
    position: relative;
}

.about-description li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-gold);
    font-weight: bold;
}

/* Services Section */
.services {
    padding: var(--spacing-lg) 0;
    background: var(--color-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.card {
    perspective: 1200px;
}

.card-inner {
    position: relative;
    width: 100%;
    height: 320px;
    transform-style: preserve-3d;
    transition: transform var(--transition-normal);
}

.card:hover .card-inner {
    transform: rotateY(180deg);
}

/* Touch device fallback */
.card.is-flipped .card-inner {
    transform: rotateY(180deg);
}

.card-front,
.card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-md);
}

.card-front {
    color: #fff;
    background-size: cover;
    background-position: center;
}

/* Горные цвета и золотистые акценты для карточек в фирменном стиле */
.card:nth-child(1) .card-front {
    background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

.card:nth-child(2) .card-front {
    background: linear-gradient(135deg, #4c1d95 0%, #8b5cf6 100%);
}

.card:nth-child(3) .card-front {
    background: linear-gradient(135deg, #7f1d1d 0%, #991b1b 100%);
}

.card:nth-child(4) .card-front {
    background: linear-gradient(135deg, #92400e 0%, #f59e0b 100%);
}

.card:nth-child(5) .card-front {
    background: linear-gradient(135deg, #065f46 0%, #10b981 100%);
}

.card:nth-child(6) .card-front {
    background: linear-gradient(135deg, #0c4a6e 0%, #0369a1 100%);
}



/* Services cards — полностью переработанные стили */
.card-front h3 {
    font-size: 1.3rem;
    font-weight: 600;
    line-height: 1.3;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    margin: 0 0 0.5rem 0;
    color: #ffffff;
    letter-spacing: 0.5px;
    text-align: center;
}

.card-subtitle {
    font-size: 1.1rem;
    color: #ffffff;
    margin: 0;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-align: center;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
}

/* Специальная раскладка только для карточки "Доставка грузов" (3-я карточка) */
.card:nth-child(3) .card-front {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.card:nth-child(3) .card-front h3 {
    white-space: nowrap;
}

.card-back {
    transform: rotateY(180deg);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    color: #1e293b;
    padding: 20px;
    box-shadow: var(--shadow-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #e2e8f0;
}

.service-description {
    width: 100%;
    text-align: left;
    color: #1e293b;
    display: flex;
    flex-direction: column;
    justify-content: center;
    /* Базовый размер для авто-масштабирования через JS */
    font-size: 1rem;
    /* Равномерные отступы между элементами */
    gap: 0.75rem;
}

.service-description h3 {
    font-size: 1.15em;
    font-weight: 600;
    margin-bottom: 0.4rem;
    line-height: 1.35;
    color: #D4AF37;
    letter-spacing: 0.01em;
}

.service-description p {
    font-size: 0.95em;
    line-height: 1.45;
    margin-bottom: 0;
    color: #475569;
}

.service-description strong {
    color: #f59e0b;
    font-weight: 600;
}

.service-features {
    text-align: left;
}

.service-features p {
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: #D4AF37;
    font-size: 1em;
}

/* Чтобы «Подробнее об услугах» точно было золотым, даже внутри strong */
.service-features p strong {
    color: #D4AF37;
}

.service-features ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.service-features li {
    font-size: 0.9em;
    line-height: 1.45;
    margin-bottom: 0.2rem;
    color: #475569;
    position: relative;
    padding-left: 1.2rem;
}

.service-features li::before {
    content: "✔";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
}

/* Advantages Section */
.advantages {
    padding: 80px 0;
    background: #f8fafc;
}

.advantages .section-header h2 {
    color: #1d4ed8;
    text-shadow: 0 0 20px rgba(29, 78, 216, 0.1);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.advantage-card {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.advantage-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 1rem;
}

.advantage-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* Contact Section */
.contact {
    padding: 80px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.contact-item a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-form {
    background: var(--color-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-medium);
    border: 1px solid var(--color-border);
}

/* Ensure desktop contact form inputs have dark, readable text */
.contact-form input {
    background: #ffffff;
    color: #1b2a3d;
}

.contact-form input::placeholder {
    color: #64748b;
}

/* Desktop override: ensure contact form input text is dark and readable */
@media (min-width: 769px) {
    .contact .contact-form input {
        color: #1b2a3d !important;
        background: #ffffff !important;
    }
    .contact .contact-form input::placeholder {
        color: #64748b !important;
    }
}

.contact-form h3 {
    font-size: var(--font-size-h4);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #FFFFFF;
}

.form-group input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-sm);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-body);
    font-family: inherit;
    transition: all var(--transition-normal);
    background: #0F1726;
    color: var(--color-text);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(42, 91, 231, 0.1);
}

.form-group input.error {
    border-color: #ef4444;
}

.form-group input.error:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.5rem;
    min-height: 1.25rem;
}

.contact-links {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #e5e7eb;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.contact-link {
    display: flex;
    align-items: center;
    padding: 0.75rem 1rem;
    background: #f9fafb;
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    color: #374151;
    text-decoration: none;
    transition: all 0.3s ease;
}

.contact-link:hover {
    background: #f3f4f6;
    border-color: #d1d5db;
    transform: translateY(-1px);
}

.contact-icon {
    font-size: 1.2rem;
}

.whatsapp-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    margin-right: 8px;
    flex-shrink: 0;
}

.contact-link.whatsapp {
    gap: 0;
}

/* Success Alert */
.success-alert {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    max-width: 400px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.alert-content {
    background: #10b981;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(16, 185, 129, 0.3);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.alert-message {
    font-weight: 500;
}

.alert-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    transition: background-color 0.2s ease;
}

.alert-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .header-content {
        padding: 0.4rem 0;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .logo {
        flex: 1;
        min-width: 0;
    }
    
    .logo-image {
        height: 75px;
        width: 75px;
    }
    
    .logo-text h1 {
        font-size: 1.1rem;
    }
    
    .logo-text p {
        font-size: 0.7rem;
    }
    
    .nav {
        order: 3;
        width: 100%;
        margin-top: 0.4rem;
        margin-left: 0;
    }
    
    .nav ul {
        gap: 1.2rem;
        justify-content: center;
    }
    
    .nav a {
        font-size: 0.8rem;
        padding: 0.3rem 0.4rem;
    }
    
    .header-contact {
        flex-direction: row;
        gap: 0.4rem;
    }
    
    .header-contact span {
        font-size: 0.7rem;
        padding: 0.2rem 0.3rem;
    }
    
    .contact-form {
        padding: 16px;
    }
    
    .contact-form h3 {
        font-size: 1.3rem;
        margin-bottom: 1rem;
    }
    
    .form-group {
        margin-bottom: 1rem;
    }
    
    .contact-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .success-alert {
        top: 10px;
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* Footer */
.footer {
    background: var(--color-bg);
    color: var(--color-text);
    padding: var(--spacing-lg) 0 var(--spacing-sm);
}

.footer-content {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr; /* ещё сильнее уводим правые колонки вправо */
    column-gap: calc(var(--spacing-xl) * 1.5);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 992px) {
    .footer-content { grid-template-columns: 1fr; column-gap: var(--spacing-lg); }
}

.footer-logo {
    display: flex;
    flex-direction: row-reverse; /* логотип сразу после текста */
    align-items: flex-start;
    gap: 0.25rem;
    width: max-content; /* контейнер сжимается под контент */
    margin-bottom: var(--spacing-sm);
}

.footer-logo-image {
    height: 85px;
    width: 85px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    background: transparent;
    box-shadow: none;
    border: none;
    transition: all var(--transition-normal);
    pointer-events: none; /* убрать кликабельность */
    align-self: center;
    display: none !important; /* скрыть логотип в футере */
}

.footer-logo-image:hover { box-shadow: none; }

.footer-logo-text { 
    display: flex; 
    flex-direction: column; 
    align-items: flex-start;
    text-align: left;
}
.footer-logo-text h3 {
    font-size: var(--font-size-h4);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text); /* белый как в хедере */
}

.footer-logo-text p {
    color: var(--color-text-muted);
    margin-bottom: 0;
    margin-left: 0; /* начало фразы на том же уровне */
}

.footer-info p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.footer-links h4,
.footer-contact h4 {
    font-size: var(--font-size-body);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a,
.footer-contact a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-normal);
}

.footer-links a:hover,
.footer-contact a:hover {
    color: var(--color-primary);
}

.footer-contact p {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.footer-bottom {
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-lg);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .card-inner {
        height: 280px;
    }
    
    .card-front h3 {
        font-size: 1.1rem;
    }
    
    .service-description h3 {
        font-size: 1rem;
    }
    
    .service-description p {
        font-size: 0.8rem;
    }
    
    .service-features li {
        font-size: 0.8rem;
    }
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .logo {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .logo-image {
        height: 105px;
        width: 105px;
    }
    
    /* Mobile footer styles */
    .footer {
        padding: 2rem 0 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: left;
    }
    
    .footer-info {
        order: 1;
        margin-bottom: 1.5rem;
    }
    
    .footer-links {
        order: 2;
        margin-bottom: 1.5rem;
    }
    
    .footer-contact {
        order: 3;
        margin-bottom: 1rem;
    }
    
    .footer-logo {
        flex-direction: column;
        text-align: left;
        gap: 0.5rem;
        align-items: flex-start;
        margin-bottom: 1rem;
    }
    
    .footer-logo-text {
        text-align: left;
        align-items: flex-start;
    }
    
    .footer-logo-text h3 {
        font-size: 1.25rem;
        margin-bottom: 0.5rem;
    }
    
    .footer-logo-text p {
        font-size: 0.9rem;
        margin-left: 0;
    }
    
    .footer-info p {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
    
    .footer-links h4,
    .footer-contact h4 {
        font-size: 1rem;
        margin-bottom: 1rem;
    }
    
    .footer-links ul {
        display: flex;
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .footer-links li {
        margin-bottom: 0;
    }
    
    .footer-links a,
    .footer-contact a {
        font-size: 0.9rem;
        padding: 0.25rem 0;
    }
    
    .footer-contact p {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }
    
    .footer-bottom {
        padding-top: 1.5rem;
        margin-top: 1rem;
        text-align: left;
    }
    
    .footer-bottom p {
        font-size: 0.8rem;
    }
    
    .nav ul {
        gap: 1rem;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .services-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0.3rem 0;
        flex-wrap: wrap;
        gap: 0.4rem;
    }
    
    .logo {
        flex: 1;
        min-width: 0;
    }
    
    .logo-image {
        height: 70px;
        width: 70px;
    }
    
    .logo-text h1 {
        font-size: 1rem;
    }
    
    .logo-text p {
        font-size: 0.65rem;
    }
    
    .nav {
        order: 3;
        width: 100%;
        margin-top: 0.3rem;
        margin-left: 0;
    }
    
    .nav ul {
        gap: 0.8rem;
        justify-content: center;
    }
    
    .nav a {
        font-size: 0.75rem;
        padding: 0.25rem 0.4rem;
    }
    
    .header-contact {
        flex-direction: row;
        gap: 0.4rem;
    }
    
    .header-contact span {
        font-size: 0.65rem;
        padding: 0.15rem 0.25rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .card-inner {
        height: 260px;
    }
    
    .card-front h3 {
        font-size: 1rem;
        padding: 0 1rem;
    }
    
    .service-description h3 {
        font-size: 0.9rem;
    }
    
    .service-description p {
        font-size: 0.75rem;
    }
    
    .service-features li {
        font-size: 0.75rem;
    }
    
    .card-front,
    .card-back {
        padding: 16px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding-block: clamp(32px, 6vw, 48px);
        min-height: clamp(46vh, 50vh, 52vh);
    }
    
    .hero::before {
        filter: grayscale(100%) blur(1px);
    }
    
    .hero-content {
        min-height: 46vh;
        padding: 0 0.5rem;
        width: 100%;
        max-width: 100%;
        margin: 0 auto;
        position: static;
        transform: none;
    }
    
    .hero-content h1 {
        font-size: clamp(24px, 6vw, 32px);
        margin-bottom: 0.5rem;
    }
    
    .hero-content p {
        font-size: clamp(14px, 3.8vw, 17px);
        margin-bottom: 0.5rem;
        max-width: 100%;
        line-height: 1.6;
        width: 100%;
        padding: clamp(12px,2.4vw,18px) clamp(16px,3vw,24px);
    }
    
    .hero-buttons {
        margin-top: 20px;
    }
    
    .hero-content h1 {
        font-size: 1.75rem;
    }
    
    .service-card,
    .advantage-card {
        padding: 1.5rem;
    }
}

/* stronger overlay and image adjustments on mobile/tablet */
@media (max-width: 768px) {
    .hero::after {
        background: radial-gradient(ellipse at center,
                    rgba(0,0,0,0.42) 0%,
                    rgba(0,0,0,0.58) 55%,
                    rgba(0,0,0,0.68) 100%);
    }
    .hero::before {
        filter: brightness(0.36) contrast(1.12);
    }
}

/* Calculation Page Styles */
.calculation-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 120px 0 80px;
    text-align: center;
}

.calculation-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 2rem;
    line-height: 1.2;
}

.calculation-benefits {
    max-width: 800px;
    margin: 0 auto;
}

.calculation-benefits ul {
    list-style: none;
    padding: 0;
    text-align: left;
}

.calculation-benefits li {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1rem;
    padding-left: 2rem;
    position: relative;
}

.calculation-benefits li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #10b981;
    font-weight: bold;
    font-size: 1.2rem;
}

.calculation-form-section {
    padding: 80px 0;
    background: #f9fafb;
}

.calculation-form-container {
    max-width: 800px;
    margin: 0 auto;
}

.calculation-form {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.calculation-form h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 2rem;
    text-align: center;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #FFFFFF;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid #e5e7eb;
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
    background: white;
    color: #1b2a3d;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input.error,
.form-group textarea.error {
    border-color: #ef4444;
}

.form-group input.error:focus,
.form-group textarea.error:focus {
    border-color: #ef4444;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.file-upload {
    position: relative;
}

.file-upload input[type="file"] {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
}

.file-upload-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 16px;
    border: 2px dashed #d1d5db;
    border-radius: 8px;
    background: #f9fafb;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-label:hover {
    border-color: #667eea;
    background: #f0f4ff;
}

.file-upload-icon {
    font-size: 1.5rem;
}

.file-upload-text {
    font-weight: 500;
    color: #374151;
}

.file-list {
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    background: #e5e7eb;
    border-radius: 6px;
    font-size: 0.875rem;
    color: #374151;
}

.file-remove {
    background: none;
    border: none;
    color: #ef4444;
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

.file-remove:hover {
    background: #fee2e2;
}

.btn-large {
    width: 100%;
    padding: 16px 24px;
    font-size: 1.1rem;
    font-weight: 600;
    margin-top: 1rem;
}

/* Active navigation state */
.nav a.active {
    color: var(--color-text);
    font-weight: 600;
}

.nav a.active::after {
    width: 100%;
    background: var(--color-gold);
}

/* Header scroll effect */
.header.scrolled {
    background: rgba(14,21,36,.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-soft);
}

/* Responsive for calculation page */
@media (max-width: 768px) {
    .calculation-content h1 {
        font-size: 2.2rem;
        margin-bottom: 1.5rem;
    }
    
    .calculation-benefits li {
        font-size: 1rem;
        padding-left: 1.5rem;
    }
    
    .calculation-form {
        padding: 24px;
        margin: 0 16px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .btn-large {
        padding: 14px 20px;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .calculation-hero {
        padding: 80px 0 60px;
    }
    
    .calculation-content h1 {
        font-size: 1.8rem;
    }
    
    .calculation-form {
        padding: 20px;
        margin: 0 8px;
    }
    
    .calculation-benefits li {
        font-size: 0.95rem;
        padding-left: 1.25rem;
    }
}

/* Mobile header styles */
.mobile-header {
    display: none;
}

.mobile-brand {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
    min-width: 0;
}

.mobile-brand__text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    text-decoration: none;
    color: inherit;
}

.mobile-brand__name {
    font-weight: 600;
    font-size: clamp(15px, 3.8vw, 17px);
    line-height: 1.2;
    color: #fff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-brand__name-cn {
    font-weight: 400;
    font-size: clamp(11px, 2.6vw, 13px);
    line-height: 1.2;
    color: rgba(255, 255, 255, 0.8);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.mobile-brand__logo {
    display: none;
}

.mobile-contacts {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 1px;
    margin-right: 8px;
    flex-shrink: 0;
    max-width: 45%;
}

.mobile-contacts__phone,
.mobile-contacts__email {
    font-size: clamp(11px, 2.6vw, 13px);
    line-height: 1.2;
    color: #E9EEF6;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 400;
}







/* Mobile responsive styles */
@media (max-width: 767px) {
    .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 6px;
        padding: 20px 16px;
        width: 100%;
        background: #0d1a2b;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }
    

    
    .header-content {
        flex-direction: column;
        gap: 0;
    }
    
    .logo,
    .nav,
    .header-contact {
        display: none !important;
    }
    
    .header {
        min-height: unset;
        padding: 0;
        background: #0d1a2b;
    }
    
    .header .container {
        padding: 0;
    }
    
    /* Mobile button styles */
    .hero-buttons {
        display: flex;
        justify-content: center;
        margin-bottom: 40px;
    }
    
    .hero-buttons .btn {
        padding: 16px 32px;
        font-size: 16px;
        width: auto;
        min-width: 200px;
        text-align: center;
    }
    
    /* Increase top margin for hero section */
    .hero {
        padding-top: 25px;
    }
    
    /* Mobile hero background - more blurred */
    .hero::before {
        filter: blur(0.8px) brightness(0.52) contrast(1.05) saturate(1.06);
        transform: scale(1.008);
    }
    
    .hero::after {
        background:
            linear-gradient(rgba(30,64,175,0.12), rgba(30,64,175,0.12)),
            radial-gradient(ellipse at center,
                rgba(255,255,255,0.18) 0%,
                rgba(173,216,230,0.25) 40%,
                rgba(23,37,84,0.45) 100%);
    }
    
    /* хедер поверх всего */
    .header { 
        position: sticky; 
        top: 0; 
        z-index: 1000; 
    }
    
    /* не даем верхним декоративным слоям ловить клики */
    .header::before, .header::after { 
        pointer-events: none; 
    }
    
    /* сама кнопка — реальная площадь клика */
    #burger {
        position: relative;
        z-index: 1100;
        width: 40px; 
        height: 40px;
        display: inline-flex; 
        align-items: center; 
        justify-content: center;
        background: transparent; 
        border: 0; 
        cursor: pointer;
    }
    
    /* иконка */
    #burger .burger-lines { 
        width: 22px; 
        height: 2px; 
        background: #fff; 
        position: relative; 
    }
    
    #burger .burger-lines::before, 
    #burger .burger-lines::after {
        content: ""; 
        position: absolute; 
        left: 0; 
        right: 0; 
        height: 2px; 
        background: #fff;
    }
    
    #burger .burger-lines::before { 
        top: -6px; 
    }
    
    #burger .burger-lines::after { 
        top: 6px; 
    }
    
    /* мобильное меню скрыто, но клики блокируем только в скрытом состоянии */
    .mobile-nav {
        position: fixed; 
        inset: 85px 0 0 0; /* ниже хедера - уменьшен отступ */
        background: rgba(10,20,35,.96);
        transform: translateY(-8px); 
        opacity: 0;
        pointer-events: none; /* ВАЖНО: клики выключены, пока скрыто */
        transition: opacity .2s ease, transform .2s ease;
        z-index: 1050;
        display: flex; 
        flex-direction: column; 
        gap: 14px; 
        padding: 16px;
    }
    
    .mobile-nav a { 
        color: #fff; 
        text-decoration: none; 
        font-size: 16px; 
        padding: 10px 4px; 
    }
    
    /* открытое состояние */
    .mobile-nav.open {
        opacity: 1; 
        transform: translateY(0);
        pointer-events: auto; /* клики ВКЛЮЧАЕМ */
    }
    
    /* блокируем прокрутку фона при открытом меню */
    .body--lock { 
        overflow: hidden; 
    }
}

/* iPhone 5 to iPhone 16 Max specific adjustments */
@media (max-width: 430px) {
    .mobile-header {
        padding: 18px 12px;
        gap: 4px;
    }
    
    .mobile-contacts {
        margin-right: 6px;
        max-width: 42%;
    }
    
    .mobile-contacts-strip {
        padding: 8px 12px;
        gap: 20px;
        font-size: clamp(11px, 2.6vw, 13px);
    }
    
    .mobile-contacts-strip {
        padding: 8px 12px;
        gap: 20px;
        font-size: clamp(11px, 2.6vw, 13px);
    }
    

    
    .mobile-burger {
        padding: 5px;
        margin-left: 2px;
    }
    
    .hero-buttons .btn {
        padding: 14px 28px;
        font-size: 15px;
        min-width: 180px;
    }
}

@media (max-width: 375px) {
    .mobile-header {
        padding: 16px 10px;
    }
    
    .mobile-contacts {
        max-width: 38%;
        margin-right: 4px;
    }
    
    .mobile-brand__name {
        font-size: 14px;
    }
    
    .mobile-contacts__phone,
    .mobile-contacts__email {
        font-size: 10px;
    }
    
    .mobile-contacts-strip {
        padding: 6px 10px;
        gap: 16px;
        font-size: clamp(10px, 2.4vw, 12px);
    }
    
    .mobile-contacts-strip {
        padding: 6px 10px;
        gap: 16px;
        font-size: clamp(10px, 2.4vw, 12px);
    }
    

    
    #burger {
        padding: 4px;
    }
    
    #burger .burger-lines {
        width: 16px;
        height: 2px;
    }
    
    .hero-buttons .btn {
        padding: 12px 24px;
        font-size: 14px;
        min-width: 160px;
    }
}

@media (max-width: 320px) {
    .mobile-header {
        padding: 14px 8px;
    }
    
    .mobile-contacts {
        max-width: 32%;
        margin-right: 2px;
    }
    
    .mobile-brand__name {
        font-size: 13px;
    }
    
    .mobile-contacts__phone,
    .mobile-contacts__email {
        font-size: 9px;
    }
    
    .mobile-contacts-strip {
        padding: 5px 8px;
        gap: 12px;
        font-size: clamp(9px, 2.2vw, 11px);
    }
    
    .mobile-contacts-strip {
        padding: 5px 8px;
        gap: 12px;
        font-size: clamp(9px, 2.2vw, 11px);
    }
    

    
    #burger {
        padding: 3px;
        margin-left: 1px;
    }
    
    #burger .burger-lines {
        width: 14px;
        height: 2px;
    }
    
    .hero-buttons .btn {
        padding: 10px 20px;
        font-size: 13px;
        min-width: 140px;
    }
}