/* CSS Variables */
:root {
    --color-primary: #1e3a8a; 
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-bg: #ffffff;
    --color-bg-light: #f8fafc;
    --color-bg-dark: #0f172a;
    --color-border: #e2e8f0;
    --color-success: #10b981;
    --color-error: #ef4444;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    
    --transition: all 0.3s ease;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* Header */
.header {
    position: sticky;
    top: 0;
    background-color: var(--color-bg);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.header__content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-md);
}

.header__logo a {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-primary);
}

.nav__list {
    display: none;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .nav__list {
        display: flex;
    }
}

.nav__link {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.nav__link:hover,
.nav__link.active {
    color: var(--color-primary);
}

.nav__link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
}

.header__contacts {
    display: none;
    align-items: center;
    gap: var(--spacing-md);
}

@media (min-width: 768px) {
    .header__contacts {
        display: flex;
    }
}

.header__phone {
    font-weight: 600;
    color: var(--color-primary);
    white-space: nowrap;
}

.header__telegram {
    display: flex;
    align-items: center;
    color: var(--color-primary);
    width: 32px;
    height: 32px;
}

.header__telegram:hover {
    opacity: 0.8;
}

/* Burger Menu */
.burger {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 24px;
    height: 20px;
    padding: 0;
}

@media (min-width: 768px) {
    .burger {
        display: none;
    }
}

.burger span {
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition);
}

.burger.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.burger.active span:nth-child(2) {
    opacity: 0;
}

.burger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Mobile Menu */
@media (max-width: 767px) {
    .header__nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    .header__nav.active {
        max-height: 500px;
    }
    
    .nav__list {
        display: flex;
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
    }
    
    .nav__link {
        padding: var(--spacing-sm);
        display: block;
    }
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn--primary {
    background-color: var(--color-primary);
    color: white;
}

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

.btn--secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.btn--secondary:hover {
    background-color: var(--color-primary);
    color: white;
}

.btn--outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) var(--spacing-md);
}

.btn--outline:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Section Titles */
.section__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

@media (min-width: 768px) {
    .section__title {
        font-size: var(--font-size-3xl);
    }
}

/* Hero Section */
.hero {
    padding: var(--spacing-2xl) 0;
    background: linear-gradient(135deg, var(--color-bg-light) 0%, var(--color-bg) 100%);
}

.hero__content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .hero__title {
        font-size: var(--font-size-4xl);
    }
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero__benefits {
    text-align: left;
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.hero__benefits li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--color-text);
}

.hero__benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 700;
}

.hero__cta {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 480px) {
    .hero__cta {
        flex-direction: row;
        justify-content: center;
    }
}

.hero__disclaimer {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-top: var(--spacing-md);
}

/* Problems Section */
.problems {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg);
}

.problems__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 640px) {
    .problems__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .problems__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.problems__cta {
    text-align: center;
}

/* Cards */
.card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary-light);
}

.card__icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card__icon img {
    width: 48px;
    height: 48px;
    object-fit: contain;
    display: block;
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.card__text {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    line-height: 1.6;
}

.card--advantage {
    text-align: center;
}

.card--service {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card--service .card__content {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.card--service .btn {
    margin-top: auto;
    align-self: flex-start;
}

/* How We Work Section */
.how-we-work {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-light);
}

.how-we-work__description {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.how-we-work__content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    align-items: center;
    justify-content: center;
}

.timeline {
    max-width: 400px;
    width: 100%;
    margin: 0 auto;
}

.how-we-work__image {
    width: 100%;
    max-width: 500px;
    display: none;
}

@media (min-width: 1024px) {
    .how-we-work__image {
        display: block;
        flex-shrink: 0;
        width: 400px;
        max-width: none;
    }
}

.how-we-work__image img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.timeline__item {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.timeline__item:not(:last-child)::after {
    content: '';
    position: absolute;
    left: 20px;
    top: 50px;
    width: 2px;
    height: calc(100% + var(--spacing-md));
    background-color: var(--color-border);
}

.timeline__number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.timeline__content {
    flex: 1;
    padding-top: var(--spacing-xs);
}

.timeline__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.timeline__text {
    color: var(--color-text-light);
    line-height: 1.6;
}

/* Advantages Section */
.advantages {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg);
}

.advantages__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .advantages__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .advantages__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Services Section */
.services {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-light);
}

.services__grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 640px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .services__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Reviews Section */
.reviews {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg);
    overflow: hidden;
}

.reviews__carousel-wrapper {
    overflow: hidden;
    position: relative;
    width: 100%;
    padding: 0 var(--spacing-md);
}

.reviews__carousel-wrapper::before,
.reviews__carousel-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 100px;
    z-index: 10;
    pointer-events: none;
}

.reviews__carousel-wrapper::before {
    left: 0;
    background: linear-gradient(to right, var(--color-bg), transparent);
}

.reviews__carousel-wrapper::after {
    right: 0;
    background: linear-gradient(to left, var(--color-bg), transparent);
}

@media (max-width: 640px) {
    .reviews__carousel-wrapper::before,
    .reviews__carousel-wrapper::after {
        width: 50px;
    }
}

.reviews__carousel {
    display: flex;
    width: fit-content;
    animation: scroll-reviews 60s linear infinite;
    will-change: transform;
}

.reviews__carousel:hover {
    animation-play-state: paused;
}

/* Пауза анимации при уменьшенной анимации в системе */
@media (prefers-reduced-motion: reduce) {
    .reviews__carousel {
        animation: none;
    }
    
    .reviews__carousel-wrapper {
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
    }
    
    .review {
        scroll-snap-align: start;
    }
}

.reviews__track {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    flex-shrink: 0;
}

.review {
    flex-shrink: 0;
    width: calc(100vw - 4rem);
    max-width: 300px;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

@media (min-width: 480px) {
    .review {
        width: 300px;
        max-width: none;
    }
}

@media (min-width: 640px) {
    .review {
        width: 350px;
    }
}

@media (min-width: 1024px) {
    .review {
        width: 380px;
    }
}

@keyframes scroll-reviews {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.review {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.review__header {
    margin-bottom: var(--spacing-sm);
}

.review__name {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.review__task {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    font-weight: 500;
}

.review__text {
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.review__footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.review__rating {
    color: #fbbf24;
    font-size: var(--font-size-base);
}

.review__date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* Contacts Section */
.contacts {
    padding: var(--spacing-2xl) 0;
    background-color: var(--color-bg-light);
}

.contacts__description {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
}

.contacts__content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    max-width: 900px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .contacts__content {
        grid-template-columns: 1fr 1.5fr;
    }
}

.contacts__info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.contact-item {
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.contact-item__label {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.contact-item__value {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    font-weight: 600;
    display: block;
}

.contact-item__value:hover {
    opacity: 0.8;
}

/* Form */
.contact-form {
    background-color: var(--color-bg);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.form-input,
.form-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: var(--transition);
    font-family: inherit;
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

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

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
    margin-top: 4px;
    cursor: pointer;
}

.form-message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    display: none;
}

.form-message.success {
    display: block;
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.form-message.error {
    display: block;
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

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

.footer__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: center;
}

@media (min-width: 768px) {
    .footer__content {
        flex-direction: row;
        justify-content: space-between;
    }
}

.footer__text {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer__contacts {
    display: flex;
    gap: var(--spacing-md);
}

.footer__link {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.footer__link:hover {
    color: white;
}

/* Fixed Call Button (Mobile) */
.fixed-call {
    position: fixed;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    width: 56px;
    height: 56px;
    background-color: var(--color-primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 999;
    transition: var(--transition);
}

@media (min-width: 768px) {
    .fixed-call {
        display: none;
    }
}

.fixed-call:hover {
    background-color: var(--color-primary-dark);
    transform: scale(1.1);
}

.fixed-call svg {
    width: 24px;
    height: 24px;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}