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

:root {
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --secondary-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.25rem;
}

.logo span {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: all 0.3s ease;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    font-weight: 400;
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 3rem;
    line-height: 1.8;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

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

/* Section Styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    color: var(--text-dark);
}

/* About Section */
.about {
    background: var(--bg-light);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-card {
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    margin-bottom: 0.75rem;
    line-height: 1.6;
    color: var(--text-dark);
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.feature-list li strong {
    color: var(--text-dark);
}

/* Benefits Section */
.benefits {
    background: var(--bg-light);
}

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

.benefit-item {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease;
}

.benefit-item:hover {
    transform: translateY(-5px);
}

.benefit-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.benefit-item h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

/* Contact Section */
.contact-content {
    max-width: 900px;
    margin: 0 auto;
}

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

.contact-card {
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.contact-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-item strong {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 600;
}

.contact-item p {
    color: var(--text-light);
    margin: 0;
}

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

.contact-item a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.offer-list {
    list-style: none;
    padding: 0;
}

.offer-list li {
    padding: 0.75rem 0;
    color: var(--text-dark);
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background: var(--text-dark);
    color: white;
    padding: 2rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-logo p {
    font-size: 0.875rem;
    opacity: 0.8;
}

.footer-info {
    opacity: 0.8;
}

/* Presentation Section */
.presentation {
    background: var(--bg-light);
}

.presentation-wrapper {
    max-width: 1000px;
    margin: 0 auto;
}

.presentation-container {
    position: relative;
    background: var(--bg-white);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    padding: 2rem;
}

.slide-counter {
    display: flex;
    align-items: center;
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
    margin-left: auto;
    padding-left: 1rem;
}

.slides-container {
    position: relative;
    min-height: 500px;
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-light);
    border-radius: 0.5rem;
    padding: 1rem;
}

.slide {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.slide.active {
    display: block;
}

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

.slide-content {
    padding: 2rem;
    text-align: center;
}

.slide-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.slide-content p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

/* Стили для изображений слайдов */
.slide-image {
    width: 100%;
    height: auto;
    max-width: 100%;
    display: block;
    object-fit: contain;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-md);
}

.company-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-top: 1rem;
}

.slide-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.slide-stat {
    text-align: center;
}

.slide-stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.slide-stat-label {
    font-size: 1rem;
    color: var(--text-light);
}

.slide-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
    text-align: left;
}

.slide-feature-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.slide-feature-category ul {
    list-style: none;
    padding: 0;
}

.slide-feature-category li {
    padding: 0.5rem 0;
    color: var(--text-dark);
    position: relative;
    padding-left: 1.5rem;
}

.slide-feature-category li:before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

.slide-list {
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.slide-list p {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.slide-list p:last-child {
    border-bottom: none;
}

.skud-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.skud-items p {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 0.5rem;
    margin: 0;
    border: none;
}

.testimonial {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-light);
    max-width: 600px;
    margin: 2rem auto;
}

.contact-slide {
    text-align: left;
    max-width: 600px;
    margin: 0 auto;
}

.contact-info-slide {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 2px solid var(--border-color);
}

.contact-info-slide p {
    margin-bottom: 0.5rem;
}

.contact-info-slide a {
    color: var(--primary-color);
    text-decoration: none;
}

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

.presentation-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 2rem;
}

.controls-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex: 1;
}

.slide-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.slide-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: scale(1.1);
}

.slide-btn:disabled {
    background: var(--text-light);
    cursor: not-allowed;
    transform: none;
    opacity: 0.5;
}

.slide-btn svg {
    width: 24px;
    height: 24px;
}

/* Contact Form Styles */
.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.contact-form-wrapper {
    display: flex;
    align-items: flex-start;
}

.contact-form-card {
    background: var(--bg-white);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    width: 100%;
}

.contact-form-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.form-description {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.form-group label {
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-size: 0.875rem;
}

.form-group input,
.form-group textarea {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 400;
    font-size: 0.875rem;
    color: var(--text-dark);
}

.checkbox-label input[type="checkbox"] {
    margin-top: 0.25rem;
    width: 18px;
    height: 18px;
    cursor: pointer;
    flex-shrink: 0;
}

.btn-submit {
    width: 100%;
    margin-top: 0.5rem;
}

.form-message {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: 0.5rem;
    text-align: center;
    font-weight: 500;
    display: none;
}

.form-message.success {
    display: block;
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.form-message.error {
    display: block;
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Responsive Design */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg-white);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
        gap: 1rem;
    }

    .nav-menu.active {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-stats {
        gap: 2rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .features-grid,
    .benefits-grid {
        grid-template-columns: 1fr;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .presentation-container {
        padding: 1rem;
    }

    .slide-content {
        padding: 1.5rem;
    }

    .slide-content h2 {
        font-size: 1.5rem;
    }

    .slides-container {
        padding: 0.5rem;
        min-height: 400px;
    }

    .slide-image {
        max-height: 70vh;
    }

    .slide-stats {
        gap: 2rem;
    }

    .slide-features {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 4rem 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .feature-card,
    .benefit-item,
    .contact-card,
    .contact-form-card {
        padding: 1.5rem;
    }

    .slide-content h2 {
        font-size: 1.25rem;
    }

    .slide-content p {
        font-size: 1rem;
    }

    .slides-container {
        min-height: 300px;
        padding: 0.25rem;
    }

    .slide-image {
        max-height: 60vh;
    }

    .slide-stat-number {
        font-size: 2rem;
    }

    .presentation-controls {
        gap: 0.5rem;
        flex-wrap: wrap;
    }

    .controls-buttons {
        gap: 0.5rem;
    }

    .slide-btn {
        width: 45px;
        height: 45px;
    }

    .slide-counter {
        margin-left: 0;
        padding-left: 0;
        width: 100%;
        justify-content: center;
        order: 2;
    }

    .controls-buttons {
        order: 1;
        width: 100%;
    }
}

/* Smooth Scroll */
html {
    scroll-behavior: smooth;
}

/* Animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.benefit-item {
    animation: fadeInUp 0.6s ease-out;
}