:root {
            --bg-dark: #121619;
            --card-bg: #1E262A;
            --accent-dark: #2D393E;
            --accent-blue: #4A7A96;
            --accent-blue-hover: #5D8AA8;
            --text-light: #F0F5F9;
            --text-gray: #B8C2C8;
            --border-color: #2D393E;
            --highlight: #5E6F70;
            --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }

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

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 
                        Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
            background-color: var(--bg-dark);
            color: var(--text-light);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            line-height: 1.6;
            font-size: clamp(16px, 2vw, 18px);
            text-rendering: optimizeLegibility;
            -webkit-font-smoothing: antialiased;
        }

        .company-name,
        .hero-title {
            font-family: "Shojumaru", "Arial Black", Gadget, sans-serif;
            font-weight: 400;
            font-style: normal;
            letter-spacing: 0.05em;
        }

        .hero-image {
            position: relative;
            height: 60vh;
            min-height: 300px;
            max-height: 800px;
            background: linear-gradient(to bottom, rgba(18, 22, 25, 0.7), rgba(18, 22, 25, 0.9)), 
                        url('https://cdna.artstation.com/p/assets/images/images/041/264/432/large/alexander-walter-samurai.jpg?1631207045') no-repeat center;
            background-size: cover;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 3rem;
            background-attachment: fixed;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 0 1.5rem;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
        }

        .hero-title {
            font-size: clamp(2.5rem, 8vw, 4.5rem);
            margin-bottom: 1.5rem;
            color: var(--text-light);
            text-shadow: 2px 2px 8px rgba(0,0,0,0.8);
            line-height: 1.1;
        }

        .hero-subtitle {
            font-size: clamp(1.1rem, 4vw, 1.8rem);
            color: var(--text-gray);
            max-width: 800px;
            margin: 0 auto;
            font-weight: 300;
            text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
        }

        header {
            width: 100%;
            height: 6vw;
            position: sticky;
            top: 0;
            z-index: 1000;
            background: linear-gradient(135deg, var(--card-bg) 0%, var(--bg-dark) 100%);
            box-shadow: var(--shadow);
            backdrop-filter: blur(5px);
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: start;
            padding: 0 0 0;
            max-width: 1400px;
            margin-top: 0;
        }
        
        .nav-button {
            color: var(--text-light);
            text-decoration: none;
            font-size: 1.1rem;
            transition: var(--transition);
            position: relative;
            padding: 0.5rem 0;
        }
        
        .nav-button:hover,
        .nav-button:focus {
            color: var(--accent-blue);
        }
        
        .nav-button::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-blue);
            transition: var(--transition);
        }
        
        .nav-button:hover::after,
        .nav-button:focus::after {
            width: 100%;
        }
        
        .nav-buttons {
            display: flex;
            justify-content: flex-end;
            gap: 3vw;
        }
        
        .nav-button {
            margin-top: 1vw;
            margin-right: 5vw;
            color: #F7EFE2;
            border: none;
            cursor: pointer;
            transition: all 0.3s ease;
            text-decoration: none;
            font-size: clamp(10px, 2.5vw, 18px);
            background: none;
            white-space: nowrap;
        }

        .company-name {
            text-decoration: none;
            font-size: 2rem;
            color: white;
            margin-top: 2vw;
            font-size: clamp(10px, 2.5vw, 18px);
            margin-right: auto;
            margin-left: 5%;
            cursor: default;
            margin-top: 1vw;
        }

        .container {
            flex: 1;
            padding: 0 1.5rem;
            margin: 0 auto 3rem;
            width: 100%;
            max-width: 1400px;
        }

        .section {
            margin-bottom: 4rem;
            scroll-margin-top: 100px;
        }

        .section-title {
            font-size: clamp(1.8rem, 5vw, 2.5rem);
            margin-bottom: 2rem;
            color: var(--text-light);
            position: relative;
            padding-bottom: 0.8rem;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--accent-blue);
            border-radius: 2px;
        }

        .history-container {
            background-color: var(--card-bg);
            border-radius: 12px;
            padding: 2.5rem;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            margin-bottom: 3rem;
            transition: var(--transition);
        }

        .history-container:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }

        .history-list {
            list-style-type: none;
            display: grid;
            gap: 2rem;
        }

        .history-item {
            padding-left: 2.5rem;
            position: relative;
            color: var(--text-gray);
            font-size: 1.1rem;
            line-height: 1.7;
        }

        .history-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.5em;
            width: 1.2rem;
            height: 1.2rem;
            background-color: var(--accent-blue);
            border-radius: 50%;
            transform: translateY(-50%);
        }

        .conditions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }

        .condition-card {
            background-color: var(--card-bg);
            border-radius: 10px;
            padding: 2rem;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .condition-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow);
            border-color: var(--accent-blue);
        }

        .condition-title {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .condition-title i {
            color: var(--accent-blue);
            font-size: 1.8rem;
            min-width: 2rem;
        }

        .condition-text {
            color: var(--text-gray);
            line-height: 1.7;
        }

        .trainers-section {
            position: relative;
        }

        .carousel-container {
            position: relative;
            margin: 0 -1rem 2rem;
            overflow: hidden;
        }

        .carousel {
            display: flex;
            overflow-x: auto;
            scroll-snap-type: x mandatory;
            scroll-behavior: smooth;
            -webkit-overflow-scrolling: touch;
            gap: 1.5rem;
            padding: 1.5rem 1rem;
            scrollbar-width: none;
        }

        .carousel::-webkit-scrollbar {
            display: none;
        }

        .trainer-card {
            scroll-snap-align: start;
            flex: 0 0 85%;
            background-color: var(--card-bg);
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .trainer-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.3);
        }

        .trainer-photo {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        .trainer-info {
            padding: 1.5rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .trainer-name {
            font-size: 1.4rem;
            margin-bottom: 0.5rem;
            color: var(--text-light);
        }

        .trainer-rank {
            color: var(--accent-blue);
            font-weight: 600;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }

        .trainer-bio {
            color: var(--text-gray);
            line-height: 1.7;
            margin-bottom: 1rem;
            flex: 1;
        }

        .carousel-nav {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            padding: 0 1rem;
        }

        .carousel-button {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--accent-blue);
            color: var(--text-light);
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            transition: var(--transition);
        }

        .carousel-button:hover,
        .carousel-button:focus {
            background-color: var(--accent-blue-hover);

        }

        .carousel-button:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .contacts {
            text-align: center;
            padding: 3rem 1.5rem;
            background-color: var(--card-bg);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 2rem;
        }

        .contact-title {
            font-size: clamp(1.5rem, 5vw, 2.2rem);
            margin-bottom: 2rem;
            color: var(--text-light);
        }

        .contact-info {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 1.5rem;
            max-width: 800px;
            margin: 0 auto;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            color: var(--text-gray);
            font-size: 1.1rem;
            text-decoration: none;
            transition: var(--transition);
            padding: 0.5rem 1rem;
            border-radius: 50px;
        }

        .contact-item:hover,
        .contact-item:focus {
            color: var(--accent-blue);
            background-color: rgba(74, 122, 150, 0.1);
        }

        .contact-item i {
            font-size: 1.3rem;
        }

        footer {
            background-color: #1E262A;
            padding: 2rem 1.5rem;
            text-align: center;
            border-top: 1px solid var(--border-color);
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            gap: 2rem;
        }

        .footer-logo {
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .footer-link {
            color: var(--text-gray);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-link:hover,
        .footer-link:focus {
            color: var(--accent-blue);
        }

        .social-links {
            display: flex;
            justify-content: center;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .social-link {
            color: var(--text-light);
            font-size: 1.5rem;
            transition: var(--transition);
        }

        .social-link:hover,
        .social-link:focus {
            color: var(--accent-blue);
            transform: translateY(-3px);
        }

        .copyright {
            color: var(--text-gray);
            font-size: 0.9rem;
        }

        .back-to-top {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            width: 50px;
            height: 50px;
            background-color: var(--accent-blue);
            color: var(--text-light);
            border: none;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            z-index: 999;
            box-shadow: var(--shadow);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover,
        .back-to-top:focus {
            background-color: var(--accent-blue-hover);
            transform: translateY(-3px);
        }

       
        @keyframes loading {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

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

        .fade-in {
            animation: fadeIn 0.8s ease-out forwards;
        }

        .delay-1 { animation-delay: 0.2s; }
        .delay-2 { animation-delay: 0.4s; }
        .delay-3 { animation-delay: 0.6s; }

        @media (min-width: 481px) {

            .header {
                width: 100%;
                height: 8vw;
            }

            footer {
                position: static;
                padding: 1rem 0;
                background: radial-gradient(circle at bottom, #121619 0%, #1E262A 100% );
            }
            
            .nav-buttons {
                justify-content: flex-start;
                gap: 1.5rem;
                padding: 0 0 0;
                margin-bottom: auto;
            }
            
            .company-name {
                display: block;
                font-size: 1rem;
                margin-right: auto;
                padding: 0 1rem;
            }
            
            .nav-button {
                font-size: 1.1rem;
                padding: 0.5rem 1rem;
                flex: initial;
            }
            
            .container {
                max-width: 1400px;
                padding: 0 2rem;
            }
            
            .hero-image {
                height: 65vh;
                min-height: 350px;
            }
            
            .hero-title {
                font-size: 3.5rem;
            }
            
            .hero-subtitle {
                font-size: 1.5rem;
            }
            
            .section {
                margin-bottom: 3rem;
            }
            
            .history-container {
                padding: 2.5rem;
                margin-bottom: 3.5rem;
            }
            
            .history-item {
                font-size: 1.2rem;
                line-height: 1.8;
            }
            
            .conditions-grid {
                grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
                gap: 1.5rem;
            }
            
            .condition-card {
                padding: 2rem;
            }
            
            .trainer-card {
                flex: 0 0 calc(50% - 1.5rem);
            }
        }

        @media (max-width: 768px) {
            .company-name { margin-left: 10%;
                            text-decoration: none; }
        }

        @media (max-width: 768px) {
            .nav-button { margin-right: 2%; 
                        font-size: clamp(5px, 2vw, 9px);}
        }

        @media (min-width: 768px) {
            .hero-image {
                height: 70vh;
            }
            
            .hero-content {
                padding: 0 3rem;
            }
            
            .container {
                padding: 0 3rem;
            }
            
            .history-list {
                grid-template-columns: 1fr 1fr;
            }
            
            .history-item {
                font-size: 1.2rem;
            }
            
            .trainer-card {
                flex: 0 0 calc(50% - 1.5rem);
            }
            
            .carousel-container {
                margin: 0 -2rem 2rem;
            }
            
            .carousel {
                padding: 2rem;
                gap: 2rem;
            }
        }

        @media (min-width: 1024px) {
            .hero-title {
                font-size: 5rem;
            }
            
            .hero-subtitle {
                font-size: 1rem;
            }
            
            .nav-container {
                padding: 0 0 0;
            }
            
            .company-name {
                font-size: 2rem;
                text-decoration: none;
                margin-top: 1.5vw;
            }
            
            .nav-button {
                font-size: 1.2rem;
                margin-top: 1.5vw;
            }
            
            .history-container {
                padding: 3rem;
            }
            
            .history-item {
                font-size: 1.3rem;
                padding-left: 3rem;
            }
            
            .trainer-card {
                flex: 0 0 calc(33.333% - 2rem);
            }
            
            .trainer-photo {
                height: 250px;
            }
            
            .footer-content {
                grid-template-columns: repeat(3, 1fr);
                align-items: center;
                text-align: left;
            }
             .footer-title {
            margin-left: 50%;
            margin-right: 50%;
        }
            .footer-links,
            .social-links {
                justify-content: flex-start;
                margin-left: 1vw;
            }
        }

        @media (min-width: 1440px) {
            .hero-image {
                height: 80vh;
            }
            .footer-title {
            margin-left: 35%;
            margin-right: 65%;
        }
            .trainer-card {
                flex: 0 0 calc(50% - 2rem);
            }
        }