:root {
            --primary-color: #5170ff;
            --primary-light: #4162ff;
            --bg-primary: #000000;
            --bg-secondary: #0a0a0a;
            --bg-tertiary: #1a1a1a;
            --accent-gradient-1: #ffffff;
            --accent-gradient-2: #2630b6;
            --glow-color-1: rgba(81, 112, 255, 0.4);
            --glow-color-2: rgba(81, 112, 255, 0.35);
            --text-primary: #ffffff;
            --text-secondary: #aaaaaa;
            --border-color: #333333;
            --transition-duration: 0.3s;
        }

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

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            min-height: 100vh;
            position: relative;
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            transition: background-color var(--transition-duration) ease, color var(--transition-duration) ease;
        }

        html, body {
            height: 100%;
        }

        body::before {
            content: '';
            position: fixed;
            top: 20%;
            left: 10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle at 30% 30%, var(--glow-color-1), rgba(81, 112, 255, 0.1) 40%, transparent 70%);
            border-radius: 50%;
            filter: blur(80px);
            z-index: 1;
            pointer-events: none;
            transition: background var(--transition-duration) ease;
        }

        body::after {
            content: '';
            position: fixed;
            bottom: 20%;
            right: 15%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle at 30% 30%, var(--glow-color-2), rgba(81, 112, 255, 0.08) 40%, transparent 70%);
            border-radius: 50%;
            filter: blur(100px);
            z-index: 1;
            pointer-events: none;
            transition: background var(--transition-duration) ease;
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 50px;
            border-bottom: 1px solid var(--border-color);
            position: relative;
            z-index: 10;
            background-color: var(--bg-primary);
            transition: border-color var(--transition-duration) ease;
        }

        .logo {
            height: 40px;
            width: auto;
        }
        
        .logo img {
            height: 100%;
            width: auto;
        }

        nav {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }

        .nav-menu {
            display: flex;
            gap: 40px;
            list-style: none;
        }

        .nav-menu a {
            color: var(--text-primary);
            text-decoration: none;
            font-weight: 600;
            font-size: 16px;
            padding-bottom: 5px;
            position: relative;
        }

        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary-color);
            transition: width var(--transition-duration) ease;
        }

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

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 6px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 0;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background-color: #fff;
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }

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

        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        .auth-container {
            display: flex;
            gap: 15px;
            align-items: center;
        }

        .login-btn {
            background-color: rgba(81, 112, 255, 0.4);
            color: #fff;
            border: 2px solid #5170ff;
            padding: 10px 25px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 16px;
            cursor: pointer;
            transition: all var(--transition-duration) ease;
            height: 48px;
            display: flex;
            align-items: center;
        }

        .login-btn:hover {
            background-color: rgba(81, 112, 255, 0.6);
        }

        .user-btn-wrapper {
            position: relative;
        }

        .user-chevron {
            width: 16px;
            height: 16px;
            transition: transform 0.3s ease;
        }

        .user-btn.active .user-chevron {
            transform: rotate(180deg);
        }

        .notification-bell {
            transition: transform 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .notification-bell:hover {
            transform: scale(1.1);
        }

        .notification-popup {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            background-color: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            min-width: 300px;
            max-width: 400px;
            max-height: 400px;
            display: none;
            flex-direction: column;
            z-index: 100;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
            overflow-y: auto;
        }

        .notification-popup.show {
            display: flex;
        }

        .notification-item {
            padding: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            cursor: pointer;
            transition: background-color var(--transition-duration) ease;
        }

        .notification-item:hover {
            background-color: rgba(81, 112, 255, 0.1);
        }

        .notification-item.unread {
            background-color: rgba(81, 112, 255, 0.05);
        }

        .notification-title {
            font-weight: 600;
            color: #fff;
            margin-bottom: 4px;
        }

        .notification-message {
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 4px;
        }

        .notification-time {
            font-size: 12px;
            color: #666;
        }

        .dropdown-icon {
            width: 16px;
            height: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .user-btn {
            background-color: rgba(81, 112, 255, 0.4);
            color: #fff;
            border: 2px solid #5170ff;
            padding: 8px 16px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 14px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: all var(--transition-duration) ease;
            height: 48px;
        }

        .user-btn:hover {
            background-color: rgba(81, 112, 255, 0.6);
        }

        .user-avatar {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            object-fit: cover;
        }

        .dropdown-menu {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            background-color: #1a1a1a;
            border: 1px solid #333;
            border-radius: 8px;
            min-width: 200px;
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 8px;
            z-index: 100;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
        }

        .dropdown-menu.show {
            display: flex;
        }

        .dropdown-item {
            color: #fff;
            text-decoration: none;
            font-weight: 500;
            font-size: 14px;
            padding: 10px 12px;
            border-radius: 6px;
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 10px;
            transition: background-color 0.2s ease;
            border: none;
            background: transparent;
            text-align: left;
            width: 100%;
        }

        .dropdown-item:hover {
            background-color: #2a2a2a;
        }

        .dropdown-item.logout:hover {
            background-color: rgba(255, 94, 94, 0.2);
            color: #ff5e5e;
        }

        main {
            display: flex;
            min-height: calc(100vh - 80px);
            position: relative;
            z-index: 5;
            background-image: 
                repeating-linear-gradient(
                    0deg,
                    rgba(128, 128, 128, 0.1) 0px,
                    rgba(128, 128, 128, 0.1) 1px,
                    transparent 1px,
                    transparent 40px
                ),
                repeating-linear-gradient(
                    90deg,
                    rgba(128, 128, 128, 0.1) 0px,
                    rgba(128, 128, 128, 0.1) 1px,
                    transparent 1px,
                    transparent 40px
                );
            transition: background-color var(--transition-duration) ease;
        }

        .sidebar {
            width: 250px;
            background-color: transparent;
            border-right: 1px solid var(--border-color);
            padding: 30px 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
            overflow-y: auto;
            flex-shrink: 0;
            height: auto;
            transition: border-color var(--transition-duration) ease;
        }

        .sidebar ul {
            list-style: none;
            padding: 0 15px;
            margin: 0;
        }

        .sidebar li {
            margin-bottom: 8px;
        }

        .config-nav-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            color: var(--text-secondary);
            text-decoration: none;
            border-radius: 8px;
            transition: all var(--transition-duration) ease;
            font-weight: 500;
            font-size: 15px;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            outline: none;
        }

        .config-nav-link:hover {
            background: rgba(81, 112, 255, 0.1);
            color: var(--text-primary);
        }

        .config-nav-link.active {
            background: rgba(81, 112, 255, 0.2);
            color: var(--primary-color);
        }

        .config-nav-link svg {
            width: 20px;
            height: 20px;
        }

        .content-area {
            flex: 1;
            padding: 30px 40px;
            overflow-y: auto;
        }

        .config-section {
            display: none;
        }

        .config-section.active {
            display: block;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .section-description {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 30px;
        }

        .appearance-panel {
            max-width: 1000px;
            background: rgba(0, 0, 0, 0.2);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
        }

        .swatches-row {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            gap: 25px;
            padding: 20px 0;
        }

        .swatch-wrapper {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }

        .swatch {
            width: 90px;
            height: 90px;
            border-radius: 50%;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
            cursor: pointer;
            transition: transform var(--transition-duration) ease, box-shadow var(--transition-duration) ease, outline-offset var(--transition-duration) ease;
            position: relative;
            border: none;
            overflow: hidden;
            outline: 3px solid transparent;
            outline-offset: 2px;
        }

        .swatch:hover {
            transform: translateY(-8px) scale(1.05);
            box-shadow: 0 12px 40px rgba(81, 112, 255, 0.4);
        }

        .swatch.active {
            outline-color: var(--primary-color);
        }

        .swatch-label {
            font-size: 15px;
            opacity: 0.9;
            text-align: center;
            font-weight: 500;
            white-space: nowrap;
        }

        .s-sunset { background: linear-gradient(135deg, #ffb86b 0%, #7e4bb8 100%); }
        .s-obsidian { background: linear-gradient(135deg, #0b0b0b 0%, #4d4d4d 100%); }
        .s-saphire { background: linear-gradient(135deg, #00b0ff 0%, #0b3cff 100%); }
        .s-parrot { background: linear-gradient(135deg, #69f0ae 0%, #00bcd4 100%); }
        .s-icicle { background: linear-gradient(135deg, #e0f7fa 0%, #8ec5ff 100%); }
        .s-lime { background: linear-gradient(135deg, #b0ff6d 0%, #7be35a 100%); }
        .s-light { background: #ffffff; }
        .s-default { background: linear-gradient(135deg, #ffffff 0%, #2630b6 100%); filter: contrast(0.95); }
        .s-dark { background: linear-gradient(135deg, #0b0b0b 0%, #2b2b2b 100%); }

        .billing-panel, .gifts-panel, .developer-panel {
            max-width: 1000px;
        }

        .billing-panel {
            background: rgba(0, 0, 0, 0.2);
            border: 1px solid var(--border-color);
            padding: 30px;
            min-height: 400px;
            border-radius: 12px;
        }

        .billing-list {
            display: flex;
            flex-direction: column;
            gap: 18px;
            margin-top: 24px;
        }

        .billing-entry {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(255, 255, 255, 0.03);
            padding: 14px 18px;
            border-radius: 10px;
            font-size: 16px;
            cursor: pointer;
            transition: background var(--transition-duration) ease;
        }

        .billing-entry:hover {
            background: rgba(255, 255, 255, 0.06);
        }

        .billing-empty {
            text-align: center;
            font-size: 16px;
            opacity: 0.7;
            margin-top: 32px;
        }

        .gifts-panel {
            background: rgba(0, 0, 0, 0.2);
            border: 1px solid var(--border-color);
            padding: 30px;
            border-radius: 12px;
        }

        .gifts-container {
            display: flex;
            flex-direction: column;
            gap: 15px;
            padding: 10px 0;
            margin-top: 20px;
        }

        .gift-entry {
            display: flex;
            align-items: center;
            background: var(--bg-tertiary);
            border: 1px solid rgba(65, 98, 255, 0.2);
            border-radius: 12px;
            padding: 15px;
            transition: background-color 0.2s;
        }

        .gift-entry:hover {
            background: rgba(65, 98, 255, 0.1);
        }

        .gift-icon-container {
            width: 60px;
            height: 60px;
            margin-right: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: rgba(255, 255, 255, 0.05);
            border-radius: 8px;
            flex-shrink: 0;
        }

        .gift-details {
            flex-grow: 1;
        }

        .gift-name {
            font-size: 18px;
            font-weight: 700;
            color: #4bffb7;
        }

        .gift-code {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 3px;
        }

        .gift-code span {
            font-weight: 600;
            color: var(--text-primary);
            font-family: monospace;
        }

        .claim-btn {
            padding: 10px 20px;
            background: linear-gradient(135deg, rgba(65, 98, 255, 0.8), rgba(65, 98, 255, 0.5));
            border: 2px solid #4162ff;
            border-radius: 8px;
            color: #fff;
            font-weight: 600;
            cursor: pointer;
            transition: all var(--transition-duration) ease;
            font-size: 14px;
            white-space: nowrap;
            flex-shrink: 0;
            margin-left: 15px;
        }

        .claim-btn:hover:not(:disabled) {
            background: linear-gradient(135deg, rgba(65, 98, 255, 1), rgba(65, 98, 255, 0.8));
            box-shadow: 0 8px 20px rgba(65, 98, 255, 0.3);
            transform: translateY(-1px);
        }

        .claim-btn:disabled {
            cursor: not-allowed;
            opacity: 0.7;
        }

        .claimed {
            padding: 10px 20px;
            background: #444;
            color: #bbb;
            border: none;
            border-radius: 8px;
            cursor: default;
            font-weight: 600;
            font-size: 14px;
            white-space: nowrap;
            flex-shrink: 0;
            margin-left: 15px;
        }

        .gift-empty,
        .gift-error,
        .loader-message {
            text-align: center;
            padding: 30px;
            color: var(--text-secondary);
            font-style: italic;
        }

        .developer-panel {
            display: flex;
            gap: 20px;
        }

        .dev-sub-panel {
            flex: 1;
            background: rgba(0, 0, 0, 0.45);
            padding: 30px;
            border-radius: 12px;
            box-shadow: 0 6px 30px rgba(0, 0, 0, 0.45);
            transition: background-color var(--transition-duration) ease;
        }

        .dev-button-row {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .dev-button {
            padding: 12px;
            border-radius: 8px;
            text-align: center;
            font-weight: 700;
            cursor: pointer;
            border: none;
            color: white;
            transition: all var(--transition-duration) ease;
        }

        .dev-button.notify {
            background: linear-gradient(135deg, rgba(220, 53, 69, 0.8), rgba(220, 53, 69, 0.5));
            border: 2px solid #dc3545;
        }

        .dev-button.notify:hover {
            background: linear-gradient(135deg, rgba(220, 53, 69, 1), rgba(220, 53, 69, 0.8));
            box-shadow: 0 8px 20px rgba(220, 53, 69, 0.3);
        }

        .dev-button.trial {
            background: linear-gradient(135deg, rgba(65, 98, 255, 0.8), rgba(65, 98, 255, 0.5));
            border: 2px solid #4162ff;
        }

        .dev-button.trial:hover {
            background: linear-gradient(135deg, rgba(65, 98, 255, 1), rgba(65, 98, 255, 0.8));
            box-shadow: 0 8px 20px rgba(65, 98, 255, 0.3);
        }

        footer {
            background-color: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 50px 50px 40px;
            position: relative;
            z-index: 10;
            width: 100%;
            margin-top: auto;
            transition: background-color var(--transition-duration) ease, border-color var(--transition-duration) ease;
        }

        .footer-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1200px;
            margin: 0 auto;
            margin-bottom: 50px;
            padding: 0 50px;
        }

        .footer-logo {
            height: 40px;
            width: auto;
        }

        .footer-logo img {
            height: 100%;
            width: auto;
        }

        .footer-links {
            display: flex;
            gap: 30px;
            align-items: center;
        }

        .footer-links a {
            color: var(--text-primary);
            text-decoration: none;
            font-weight: 500;
            font-size: 14px;
            transition: color var(--transition-duration) ease;
        }

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

        .footer-links span {
            color: var(--text-primary);
            font-size: 14px;
        }

        .footer-copyright {
            text-align: center;
            color: #666;
            font-size: 12px;
            padding-top: 20px;
            margin-top: 20px;
        }

        /* ========== RESPONSIVE DESIGN ========== */
        
        /* Extra Large Screens (1440px+) */
        @media (min-width: 1440px) {
            header {
                padding: 20px 60px;
            }

            .footer-container {
                padding: 0 60px;
            }
        }

        /* Large Screens (1024px - 1439px) */
        @media (max-width: 1439px) and (min-width: 1024px) {
            header {
                padding: 15px 40px;
            }

            .nav-menu {
                gap: 25px;
                font-size: 15px;
            }

            .footer-container {
                padding: 0 40px;
            }

            .footer-links {
                gap: 30px;
                font-size: 13px;
            }
        }

        /* Tablets (768px - 1023px) */
        @media (max-width: 1023px) and (min-width: 768px) {
            body {
                overflow-x: visible;
            }

            header {
                padding: 15px 30px;
                gap: 12px;
            }

            .hamburger {
                display: none;
            }

            .logo {
                height: 40px;
            }

            nav {
                display: flex !important;
                position: static;
                background-color: transparent;
                border: none;
                padding: 0;
                margin: 0;
                order: unset;
                box-shadow: none;
            }

            .nav-menu {
                gap: 20px;
                font-size: 14px;
                flex-direction: row;
                align-items: center;
            }

            .nav-menu a {
                padding: 8px 0;
                font-size: 14px;
            }

            .auth-container {
                gap: 12px;
            }

            .login-btn,
            .user-btn {
                padding: 10px 18px;
                font-size: 13px;
                height: 42px;
                min-width: 120px;
            }

            main {
                flex-direction: column;
                padding: 20px;
            }

            .sidebar {
                width: 100%;
                border-right: none;
                border-bottom: 1px solid var(--border-color);
                padding: 15px 0;
                display: flex;
                flex-direction: row;
                overflow-x: auto;
                margin-bottom: 20px;
            }

            .sidebar ul {
                display: flex;
                gap: 12px;
                padding: 0 20px;
            }

            .sidebar li {
                margin-bottom: 0;
                white-space: nowrap;
            }

            .content-area {
                padding: 20px;
            }

            .section-title {
                font-size: 32px;
                margin-bottom: 15px;
            }

            .section-description {
                font-size: 14px;
                margin-bottom: 25px;
            }

            .swatches-row {
                justify-content: center;
                gap: 12px;
            }

            .developer-panel {
                flex-direction: column;
                gap: 20px;
            }

            .dev-sub-panel {
                padding: 24px;
            }

            footer {
                padding: 35px 30px 25px;
            }

            .footer-container {
                padding: 0 30px;
                flex-direction: column;
                gap: 20px;
                align-items: center;
                margin-bottom: 30px;
            }

            .footer-logo {
                height: 35px;
            }

            .footer-links {
                gap: 18px;
                font-size: 12px;
                justify-content: center;
            }

            .footer-copyright {
                font-size: 11px;
            }
        }

        /* Small Tablets & Large Phones (480px - 767px) */
        @media (max-width: 767px) and (min-width: 480px) {
            header {
                padding: 14px 20px;
                gap: 12px;
            }

            .hamburger {
                display: flex;
                order: 1;
                width: 40px;
                height: 40px;
            }

            .logo {
                display: none;
            }

            nav {
                position: absolute;
                top: 100%;
                left: 72px;
                right: auto;
                background-color: var(--bg-secondary, #0a0a0a);
                border: 1px solid var(--primary-color, #5170ff);
                border-radius: 8px;
                padding: 12px;
                margin-top: 8px;
                order: 3;
                width: auto;
                max-width: 600px;
                display: none;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
                z-index: 1000;
            }

            nav.show {
                display: block;
            }

            .nav-menu {
                gap: 6px;
                font-size: 13px;
                flex-direction: column;
                align-items: stretch;
            }

            .nav-menu a {
                padding: 12px 14px;
                border-radius: 6px;
                font-size: 13px;
                display: block;
                transition: all 0.2s ease;
            }

            .nav-menu a:hover {
                background-color: rgba(81, 112, 255, 0.1);
            }

            .auth-container {
                gap: 10px;
                order: 2;
            }

            .dropdown-menu {
                position: fixed;
                top: auto;
                right: 20px;
                left: auto;
                margin: 0;
                max-width: calc(100vw - 40px);
                z-index: 1000;
            }

            .dropdown-menu.show {
                display: flex;
            }

            .dropdown-item {
                color: #ffffff;
                font-size: 14px;
            }

            .login-btn,
            .user-btn {
                padding: 10px 16px;
                font-size: 13px;
                height: 42px;
                min-width: 110px;
            }

            main {
                flex-direction: column;
                padding: 15px;
            }

            .sidebar {
                width: 100%;
                border-right: none;
                border-bottom: 1px solid var(--border-color);
                padding: 12px 0;
                display: flex;
                flex-direction: row;
                overflow-x: auto;
                margin-bottom: 15px;
            }

            .sidebar ul {
                display: flex;
                gap: 8px;
                padding: 0 15px;
            }

            .sidebar li {
                margin-bottom: 0;
                white-space: nowrap;
            }

            .sidebar a {
                padding: 8px 12px;
                font-size: 12px;
            }

            .content-area {
                padding: 15px;
            }

            .section-title {
                font-size: 28px;
                margin-bottom: 12px;
            }

            .section-description {
                font-size: 13px;
                margin-bottom: 20px;
            }

            .swatches-row {
                justify-content: center;
                gap: 10px;
            }

            .swatch-wrapper {
                gap: 6px;
            }

            .swatch {
                width: 52px;
                height: 52px;
            }

            .swatch-label {
                font-size: 11px;
            }

            .appearance-panel,
            .billing-panel,
            .gifts-panel {
                padding: 16px;
            }

            .developer-panel {
                flex-direction: column;
                gap: 16px;
            }

            .dev-sub-panel {
                padding: 18px;
            }

            .dev-button {
                padding: 11px;
                font-size: 13px;
            }

            .claim-btn {
                padding: 9px 14px;
                font-size: 12px;
                margin-left: 10px;
            }

            .claimed {
                padding: 9px 14px;
                font-size: 12px;
                margin-left: 10px;
            }

            footer {
                padding: 30px 20px 20px;
            }

            .footer-container {
                padding: 0 20px;
                margin-bottom: 20px;
                flex-direction: column;
                gap: 15px;
                align-items: center;
            }

            .footer-logo {
                height: 32px;
            }

            .footer-links {
                gap: 12px;
                font-size: 12px;
                justify-content: center;
                flex-wrap: wrap;
            }

            .footer-copyright {
                font-size: 11px;
                padding-top: 12px;
                margin-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }
        }

        /* Small Phones (320px - 479px) */
        @media (max-width: 479px) {
            header {
                padding: 12px 15px;
                gap: 10px;
            }

            .hamburger {
                display: flex;
                order: 1;
                width: 36px;
                height: 36px;
            }

            .hamburger span {
                width: 20px;
                height: 2px;
            }

            .logo {
                display: none;
            }

            nav {
                position: absolute;
                top: 100%;
                left: 60px;
                right: auto;
                background-color: var(--bg-secondary, #0a0a0a);
                border: 1px solid var(--primary-color, #5170ff);
                border-radius: 8px;
                padding: 10px;
                margin-top: 0;
                order: 3;
                width: auto;
                max-width: 600px;
                display: none;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7);
                z-index: 1000;
            }

            nav.show {
                display: block;
            }

            .nav-menu {
                gap: 4px;
                font-size: 12px;
                flex-direction: column;
                align-items: stretch;
            }

            .nav-menu a {
                padding: 11px 12px;
                border-radius: 5px;
                font-size: 12px;
                display: block;
                transition: all 0.2s ease;
            }

            .nav-menu a:hover {
                background-color: rgba(81, 112, 255, 0.1);
            }

            .auth-container {
                gap: 8px;
                order: 2;
            }

            .login-btn,
            .user-btn {
                padding: 9px 14px;
                font-size: 12px;
                height: 40px;
                min-width: 100px;
            }

            .user-avatar {
                width: 28px;
                height: 28px;
            }

            main {
                flex-direction: column;
                padding: 12px 0;
            }

            .sidebar {
                width: 100%;
                border-right: none;
                border-bottom: 1px solid var(--border-color);
                padding: 10px 0;
                display: flex;
                flex-direction: row;
                overflow-x: auto;
                margin-bottom: 12px;
            }

            .sidebar ul {
                display: flex;
                gap: 6px;
                padding: 0 12px;
            }

            .sidebar li {
                margin-bottom: 0;
                white-space: nowrap;
            }

            .sidebar a {
                padding: 7px 10px;
                font-size: 11px;
            }

            .content-area {
                padding: 12px;
            }

            .section-title {
                font-size: 24px;
                margin-bottom: 8px;
            }

            .section-description {
                font-size: 12px;
                margin-bottom: 16px;
            }

            .swatches-row {
                justify-content: center;
                gap: 8px;
            }

            .swatch-wrapper {
                gap: 5px;
            }

            .swatch {
                width: 44px;
                height: 44px;
            }

            .swatch-label {
                font-size: 10px;
            }

            .appearance-panel,
            .billing-panel,
            .gifts-panel {
                padding: 12px;
            }

            .billing-item {
                padding: 12px;
                gap: 10px;
            }

            .billing-date {
                font-size: 12px;
            }

            .billing-amount {
                font-size: 14px;
            }

            .gift-item {
                padding: 12px;
                flex-direction: column;
                gap: 10px;
                align-items: stretch;
            }

            .gift-icon {
                width: 40px;
                height: 40px;
            }

            .gift-name {
                font-size: 16px;
            }

            .gift-code {
                font-size: 12px;
            }

            .claim-btn {
                padding: 8px 12px;
                font-size: 11px;
                margin-left: 0;
                width: 100%;
            }

            .claimed {
                padding: 8px 12px;
                font-size: 11px;
                margin-left: 0;
                width: 100%;
            }

            .developer-panel {
                flex-direction: column;
                gap: 12px;
            }

            .dev-sub-panel {
                padding: 14px;
            }

            .dev-button {
                padding: 10px;
                font-size: 12px;
            }

            footer {
                padding: 25px 15px 15px;
            }

            .footer-container {
                padding: 0 15px;
                margin-bottom: 18px;
                flex-direction: column;
                gap: 12px;
                align-items: center;
            }

            .footer-logo {
                height: 28px;
            }

            .footer-links {
                font-size: 10px;
                gap: 6px;
                justify-content: center;
                flex-wrap: wrap;
            }

            .footer-links a {
                padding: 4px 0;
            }

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

            .footer-copyright {
                font-size: 10px;
                padding-top: 8px;
                margin-top: 8px;
            }
        }