/* Font definitions */
@font-face {
    font-family: 'Montserrat';
    src: local('Montserrat Regular'),
         url('../fonts/Montserrat-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
    unicode-range: U+000-5FF; /* Латиница и кириллица */
}

@font-face {
    font-family: 'Montserrat';
    src: local('Montserrat Bold'),
         url('../fonts/Montserrat-Bold.woff2') format('woff2');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
    unicode-range: U+000-5FF;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-Regular.woff2') format('woff2');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Open Sans';
    src: url('../fonts/OpenSans-SemiBold.woff2') format('woff2');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

/* Base Styles */
:root {
    --primary-color: #333;
    --secondary-color: #777;
    --accent-color: #0066cc;
    --light-color: #fff;
    --dark-color: #111;
    --dark-gray: #222;
    --medium-gray: #333;
    --gray-color: #f4f4f4;
    --footer-text-color: #bbb;
    
    /* Размеры */
    --header-height: 80px;
    --footer-height: 100px;
    
    /* Система отступов */
    --space-unit: 8px;
    --space-xs: calc(var(--space-unit) * 1);    /* 8px */
    --space-sm: calc(var(--space-unit) * 2);    /* 16px */
    --space-md: calc(var(--space-unit) * 3);    /* 24px */
    --space-lg: calc(var(--space-unit) * 4);    /* 32px */
    --space-xl: calc(var(--space-unit) * 5);    /* 40px */
    
    /* Сетка */
    --container-padding-desktop: 24px;
    --container-padding-tablet: 20px;
    --container-padding-mobile: 16px;
    
    /* Анимации */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Эффекты */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 15px rgba(0, 0, 0, 0.15);
    
    /* Доступность */
    --focus-ring-color: rgba(0, 102, 204, 0.5);
    --focus-ring-width: 3px;
    
    /* Производительность */
    --content-visibility-card: auto;
    --content-visibility-section: auto;
    --contain-paint: paint;
    --contain-layout: layout;
    --contain-strict: strict;
    --contain-content: content;
}

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

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--primary-color);
    overflow-x: hidden;
    background-color: var(--dark-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: all 0.3s ease;
}

a:hover {
    color: var(--accent-color);
}

/* Улучшенный фокус для всех интерактивных элементов */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: 2px;
    box-shadow: 0 0 0 var(--focus-ring-width) var(--focus-ring-color);
}

/* Улучшенная контрастность */
.hero h1,
.hero-subtitle,
.cta-text {
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

/* Улучшенная читаемость */
.advantage-card p,
.footer-contact a,
.footer-links a {
    font-size: max(12px, 0.875rem);
    letter-spacing: 0.01em;
}

/* Производительность */
.hero-video {
    will-change: transform;
    backface-visibility: hidden;
    loading: lazy;
    decoding: async;
}

.advantage-card,
.btn {
    will-change: transform;
}

/* Улучшенная поддержка тёмной темы */
@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #e0e0e0;
        --secondary-color: #a0a0a0;
        --dark-color: #121212;
        --light-color: #ffffff;
        --gray-color: #1a1a1a;
    }
    
    .advantage-card {
        background-color: rgba(255, 255, 255, 0.05);
    }
    
    .footer {
        background-color: rgba(0, 0, 0, 0.8);
    }
}

/* Улучшенная поддержка высококонтрастного режима */
@media (forced-colors: active) {
    .btn,
    .advantage-card,
    .footer {
        border: 1px solid currentColor;
    }
    
    .hero-overlay {
        background: none;
        -ms-high-contrast-adjust: none;
    }
}

/* Оптимизация для печати */
@media print {
    .hero-video,
    .hero-overlay,
    .btn {
        display: none !important;
    }
    
    .hero {
        height: auto !important;
        min-height: 0 !important;
    }
    
    .hero-content,
    .advantage-card {
        break-inside: avoid;
    }
    
    body {
        background: white !important;
        color: black !important;
    }
    
    a {
        text-decoration: underline !important;
        color: blue !important;
    }
    
    a[href^="http"]::after {
        content: " (" attr(href) ")";
    }
}

/* Container */
.container {
    width: 100%;
    margin: 0 auto;
    padding-left: var(--container-padding-desktop);
    padding-right: var(--container-padding-desktop);
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-weight: 600;
    text-transform: uppercase;
    cursor: pointer;
    transition: all var(--transition-medium);
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width var(--transition-medium), height var(--transition-medium);
}

.btn:hover::after {
    width: 200%;
    height: 200%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(1px);
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    z-index: 1000;
    transition: background-color 0.3s ease;
    contain: var(--contain-layout);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    backface-visibility: hidden;
}

.header:hover {
    background-color: rgba(0, 0, 0, 0.7);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    padding-left: var(--container-padding-desktop);
    padding-right: var(--container-padding-desktop);
}

.logo {
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    padding: var(--space-sm);
}

.logo:hover {
    transform: scale(1.02);
    filter: brightness(1.1);
}

.logo-text {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 24px;
    color: var(--light-color);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
    letter-spacing: 1px;
}

.main-menu ul {
    display: flex;
    list-style: none;
    flex-wrap: nowrap;
    margin: 0;
    padding: 0;
}

.main-menu li {
    margin-left: var(--space-md);
    white-space: nowrap;
}

.main-menu li:first-child {
    margin-left: 0;
}

.main-menu a {
    font-weight: 500;
    text-transform: uppercase;
    color: var(--light-color);
    position: relative;
    padding: var(--space-sm) var(--space-xs);
    letter-spacing: 0.5px;
    display: block;
    min-height: 44px;
    display: flex;
    align-items: center;
    transition: color var(--transition-fast);
}

.main-menu a::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: var(--space-xs);
    left: 0;
    background-color: transparent;
    transition: background-color var(--transition-fast);
}

.main-menu a:hover::after {
    background-color: var(--light-color);
}

/* Исправлено - подчеркивание только при наведении */
.main-menu a.active::after {
    width: 0;
}

.main-menu a.active:hover::after {
    width: 100%;
}

/* Бургер-меню */
.mobile-menu-toggle {
    display: none; /* По умолчанию скрыто, но будет показано в медиа-запросах */
    flex-direction: column;
    justify-content: space-between;
    width: 35px; /* Увеличиваем размер */
    height: 25px; /* Увеличиваем размер */
    cursor: pointer;
    z-index: 1001;
    margin-left: 20px;
    position: relative;
    background-color: transparent;
    border: none;
    outline: none;
}

.mobile-menu-toggle span {
    display: block;
    height: 3px;
    width: 100%;
    background-color: var(--light-color);
    transition: all 0.3s ease;
    border-radius: 3px;
    position: absolute;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3); /* Тень для лучшей видимости */
}

.mobile-menu-toggle span:nth-child(1) {
    top: 0;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 11px; /* Центрируем */
}

.mobile-menu-toggle span:nth-child(3) {
    top: 22px; /* Внизу */
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 11px;
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 11px;
}

/* Оверлей для мобильного меню */
.menu-overlay {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100% - var(--header-height));
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.menu-overlay.active {
    display: block;
    opacity: 0.95;
}

/* Hero Section */
.hero {
    position: relative;
    height: var(--hero-height, 100vh);
    margin-top: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    min-width: 100%;
    min-height: 100%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 1;
    transform: translate3d(0, 0, 0);
    -webkit-transform: translate3d(0, 0, 0);
    perspective: 1000px;
    backface-visibility: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.6));
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-xl);
    text-align: center;
}

.hero h1 {
    color: var(--light-color);
    font-size: clamp(2.5rem, 5vw, 4rem);
    line-height: 1.2;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: var(--space-md);
    margin: 0 auto var(--space-md);
    max-width: 900px;
}

.cta-text {
    color: var(--light-color);
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
    font-weight: 400;
    line-height: 1.6;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
    margin: 0 auto var(--space-lg);
    max-width: 800px;
}

.hero-subtitle {
    grid-column: 4 / 10;
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    margin-bottom: var(--space-xl);
    color: #e0e0e0;
    line-height: 1.8;
    animation: slideUp var(--transition-slow) forwards;
    animation-delay: 0.6s;
    opacity: 0;
}

.hero-buttons {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-top: var(--space-lg);
    animation: slideUp var(--transition-slow) forwards;
    animation-delay: 0.8s;
    opacity: 0;
}

/* Advantages Section */
.advantages {
    padding: var(--space-xl) 0;
    background-color: var(--gray-color);
    content-visibility: var(--content-visibility-section);
    contain-intrinsic-size: 600px;
}

.advantages .container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--space-lg);
}

.section-title-wrapper {
    grid-column: 3 / 11;
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--dark-color);
    text-align: center;
    margin: 0;
    padding: 2rem 0;
    font-family: 'Montserrat', sans-serif;
}

.section-subtitle {
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    color: var(--secondary-color);
    line-height: 1.8;
    max-width: 600px;
    margin: 0 auto;
}

.advantages-grid {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
    padding: 0 var(--space-md);
    contain: var(--contain-layout);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

.advantage-card {
    background-color: var(--light-color);
    padding: var(--space-lg);
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-medium);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    content-visibility: var(--content-visibility-card);
    contain-intrinsic-size: 300px;
    contain: var(--contain-paint);
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-color);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.advantage-card:hover::before {
    opacity: 1;
}

.advantage-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 0%, rgba(255, 255, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-medium);
}

.advantage-card:hover::after {
    opacity: 1;
}

.advantage-number {
    font-size: clamp(2rem, 3vw, 2.5rem);
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: var(--space-md);
    opacity: 0.8;
}

.advantage-card h3 {
    font-size: clamp(1.25rem, 2vw, 1.5rem);
    margin-bottom: var(--space-md);
    color: var(--dark-color);
    line-height: 1.4;
}

.advantage-card p {
    color: var(--secondary-color);
    line-height: 1.8;
    margin: 0;
    font-size: clamp(0.9rem, 1.1vw, 1rem);
}

/* Footer Styles */
.footer {
    flex-shrink: 0;
    background-color: #1a1a1a;
    color: #fff;
    width: 100%;
    padding: 10px 0 8px;
    position: relative;
    z-index: 10;
}

.footer .container {
    padding-left: var(--container-padding-desktop);
    padding-right: var(--container-padding-desktop);
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 4px;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 4px;
}

.footer-contact-item .icon {
    margin-right: 15px;
    font-size: 11px;
    color: #666;
    min-width: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0;
    transform: none;
}

.footer-contact-item a {
    color: #666;
    font-size: 11px;
    line-height: 1;
    transition: color 0.3s ease;
}

.footer-contact-item a:hover {
    color: var(--accent-color);
}

.footer-links {
    display: flex;
    gap: 15px;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    font-size: 11px;
    transition: color 0.3s ease;
}

.footer-bottom {
    text-align: center;
    font-size: 10px;
    color: rgba(255, 255, 255, 0.7);
    padding-top: 5px;
}

.footer-bottom p {
    margin: 0;
    line-height: 1;
}

/* Иконки для футера с использованием псевдоэлементов */
.icon {
    display: inline-flex;
    width: 14px;
    margin-right: var(--space-xs);
    text-align: center;
    color: var(--light-color);
    align-items: center;
    justify-content: center;
}

.icon-location::before {
    content: '\f3c5';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

.icon-phone::before {
    content: '\f095';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

.icon-email::before {
    content: '\f0e0';
    font-family: 'Font Awesome 5 Free';
    font-weight: 900;
}

/* Hero Text Styles */
.hero h1, .cta-text, .design-hero h1 {
    background-color: transparent;
    padding: 0;
    border-radius: 0;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

/* Design & Engineering Section */
.design-engineering .hero.design-hero {
    height: 40vh;
}

/* Preload критических ресурсов */
body::after {
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
    z-index: -1;
    content: url(../images/resize/desktop.webp);
}

/* Стили для доступности */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

/* Стили для состояния открытого меню */
body.menu-open {
    overflow: hidden;
}

.resize-icon {
    width: 24px;
    height: 24px;
    margin-right: 8px;
    vertical-align: middle;
}

@media (max-width: 1199px) {
    .container {
        padding-left: var(--container-padding-tablet);
        padding-right: var(--container-padding-tablet);
    }
    
    .header .container,
    .footer .container {
        padding-left: var(--container-padding-tablet);
        padding-right: var(--container-padding-tablet);
    }
    
    .main-menu li {
        margin-left: var(--space-sm);
    }
    
    .main-menu a {
        padding: var(--space-xs);
    }
    
    .hero-content {
        padding: var(--space-lg);
    }
    
    .hero-title-wrapper {
        grid-column: 1 / -1;
    }
    
    .cta-text {
        grid-column: 2 / 12;
    }
    
    .hero-subtitle {
        grid-column: 3 / 11;
    }
}

@media (max-width: 991px) {
    .main-menu.active {
        padding: var(--space-md) 0;
    }
    
    .main-menu.active li {
        margin: var(--space-xs) 0;
        width: 100%;
    }
    
    .main-menu.active a {
        padding: var(--space-sm);
        justify-content: center;
    }
    
    .hero-content {
        padding: var(--space-md);
    }
    
    .cta-text {
        grid-column: 1 / -1;
    }
    
    .hero-subtitle {
        grid-column: 2 / 12;
    }
    
    .section-title {
        font-size: 2.2rem;
        padding: 1.5rem 0;
    }
    
    .footer-contact {
        gap: 15px;
    }
}

@media (max-width: 767px) {
    .container {
        padding-left: var(--container-padding-mobile);
        padding-right: var(--container-padding-mobile);
    }
    
    .header .container,
    .footer .container {
        padding-left: var(--container-padding-mobile);
        padding-right: var(--container-padding-mobile);
    }
    
    .footer {
        padding: 8px 0 5px;
    }

    .footer-top {
        margin-bottom: 3px;
        padding-bottom: 3px;
        gap: 5px;
    }

    .footer-contact {
        width: 100%;
        align-items: center;
        gap: 3px;
    }

    .footer-contact-item {
        margin-bottom: 3px;
    }

    .footer-contact-item a {
        font-size: 10px;
    }

    .footer-links {
        width: 100%;
        justify-content: center;
    }

    .footer-links a {
        font-size: 10px;
    }

    .footer-bottom {
        font-size: 9px;
        padding-top: 3px;
    }
    
    .hero-content {
        padding: var(--space-sm);
        gap: var(--space-sm);
    }
    
    .hero-subtitle {
        grid-column: 1 / -1;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: var(--space-sm);
        padding: 0 var(--space-md);
    }
    
    .btn {
        width: 100%;
        min-width: auto;
    }
    
    .hero-content > * {
        animation-delay: 0.1s !important;
    }
    
    .hero,
    .advantages,
    .footer {
        content-visibility: auto;
        contain-intrinsic-size: 300px;
    }
    
    .advantage-card {
        contain-intrinsic-size: 200px;
    }
    
    .section-title {
        font-size: 2rem;
        padding: 1.25rem 0;
    }

    .footer-contact-item {
        justify-content: center;
        align-items: center;
    }

    .footer-contact-item .icon {
        font-size: 10px;
        margin-right: 10px;
    }

    .hero h1,
    .hero-subtitle,
    .cta-text {
        text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.8);
    }

    .hero-overlay {
        background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.7));
    }

    .main-menu.active {
        background-color: rgba(0, 0, 0, 0.95);
    }

    .main-menu a {
        text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
        font-size: 1.1rem;
        padding: var(--space-md) var(--space-sm);
    }

    .logo-text {
        text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }
}

@media (max-width: 575px) {
    .section-title {
        font-size: 1.8rem;
        padding: 1rem 0;
    }
    
    .trade-section {
        padding-top: 0.5rem;
    }
    
    .card-grid {
        margin-top: 1rem;
    }

    .footer {
        padding: 6px 0 4px;
    }

    .footer-top {
        margin-bottom: 2px;
        padding-bottom: 2px;
        gap: 4px;
    }

    .footer-contact {
        gap: 2px;
    }

    .footer-contact-item {
        margin-bottom: 2px;
    }

    .footer-contact-item .icon {
        margin-right: 8px;
    }
}

/* Анимации появления */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Медиа-запросы для отключения некоторых анимаций на мобильных */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    .advantage-card,
    .btn,
    .logo {
        transition: none !important;
        transform: none !important;
    }
    
    .hero-content > * {
        animation: none !important;
        opacity: 1 !important;
    }
}

/* Оптимизация рендеринга */
.hero,
.advantages,
.footer {
    content-visibility: var(--content-visibility-section);
    contain-intrinsic-size: 600px;
}

/* Оптимизация изображений */
img {
    loading: lazy;
    decoding: async;
}

/* Улучшение производительности анимаций */
@media (prefers-reduced-motion: no-preference) {
    .advantage-card,
    .btn,
    .logo {
        transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
        transition-duration: 200ms;
    }
    
    .hero-content > * {
        transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
        transition-duration: 300ms;
    }
}

/* Trade Page Styles */
.trade-page {
    padding-top: var(--header-height);
}

.trade-section {
    flex: 1 0 auto;
    padding: 0;
    margin: 0;
}

/* Section Headers */
.section-header {
    text-align: center;
    width: 100%;
    margin: 0;
    padding: 0;
}

.section-header h1 {
    color: #333333;
    font-size: 2rem;
    font-weight: 700;
    font-family: 'Montserrat', sans-serif;
    margin: 0;
    padding: 1rem 15px;
    line-height: 1.2;
}

/* Trade Section */
.trade-section {
    flex: 1 0 auto;
    padding-top: 1rem;  /* Добавляем небольшой отступ сверху */
}

.card-grid {
    margin-top: 2rem;  /* Добавляем отступ от заголовка до карточек */
}

@media (max-width: 991px) {
    .section-header h1 {
        font-size: 1.8rem;
    }
}

@media (max-width: 767px) {
    .section-header h1 {
        font-size: 1.5rem;
        padding: 0.75rem 15px;
    }
    
    .trade-section {
        padding-top: 0.75rem;
    }
    
    .card-grid {
        margin-top: 1.5rem;
    }
}

@media (max-width: 575px) {
    .section-header h1 {
        font-size: 1.25rem;
        padding: 0.5rem 10px;
    }
    
    .trade-section {
        padding-top: 0.5rem;
    }
    
    .card-grid {
        margin-top: 1rem;
    }
}

.footer p {
    color: var(--footer-text-color);
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer a {
    color: var(--footer-text-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

/* Notification Styles */
.message {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 4px;
    font-size: 0.95rem;
    line-height: 1.5;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.message-error {
    background-color: #fef2f2;
    border: 1px solid #fee2e2;
    color: #991b1b;
}

.message-success {
    background-color: #f0fdf4;
    border: 1px solid #dcfce7;
    color: #166534;
}

.message-warning {
    background-color: #fffbeb;
    border: 1px solid #fef3c7;
    color: #92400e;
}

.message-info {
    background-color: #eff6ff;
    border: 1px solid #dbeafe;
    color: #1e40af;
}

/* Form Validation Styles */
.form-group.has-error input,
.form-group.has-error textarea {
    border-color: #dc2626;
    background-color: #fef2f2;
}

.form-group.has-error label {
    color: #dc2626;
}

.error-text {
    color: #dc2626;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.form-group.is-valid input,
.form-group.is-valid textarea {
    border-color: #059669;
    background-color: #f0fdf4;
}

.form-group.is-valid label {
    color: #059669;
}

/* Accessibility Improvements */
@media (prefers-contrast: more) {
    .message-error {
        background-color: #fee2e2;
        color: #7f1d1d;
    }

    .message-success {
        background-color: #dcfce7;
        color: #14532d;
    }

    .message-warning {
        background-color: #fef3c7;
        color: #7c2d12;
    }

    .message-info {
        background-color: #dbeafe;
        color: #1e3a8a;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    .message-error {
        background-color: #7f1d1d;
        border-color: #991b1b;
        color: #fee2e2;
    }

    .message-success {
        background-color: #14532d;
        border-color: #166534;
        color: #dcfce7;
    }

    .message-warning {
        background-color: #7c2d12;
        border-color: #92400e;
        color: #fef3c7;
    }

    .message-info {
        background-color: #1e3a8a;
        border-color: #1e40af;
        color: #dbeafe;
    }

    .form-group.has-error input,
    .form-group.has-error textarea {
        background-color: rgba(220, 38, 38, 0.1);
        border-color: #ef4444;
    }

    .form-group.is-valid input,
    .form-group.is-valid textarea {
        background-color: rgba(5, 150, 105, 0.1);
        border-color: #10b981;
    }
}