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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #2c3e50;
            color: #ecf0f1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .header {
            background: #34495e;
            padding: 12px 32px;
            display: flex;
            align-items: center;
            gap: 24px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            position: sticky;
            top: 0;
            z-index: 100;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: white;
            font-size: 20px;
            font-weight: 600;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, #ff6b6b, #ff8787);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .search-container {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 100%;
            max-width: 500px;
        }

        .search-container input {
            width: 100%;
            padding: 10px 16px 10px 40px;
            background: #2c3e50;
            border: 1px solid #445566;
            border-radius: 8px;
            color: #ecf0f1;
            font-size: 14px;
        }

        .search-container input::placeholder {
            color: #95a5a6;
        }

        .search-icon {
            position: absolute;
            left: 12px;
            top: 50%;
            transform: translateY(-50%);
            color: #95a5a6;
            font-size: 16px;
        }

        .header-icons {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-left: auto;
        }

        .icon-btn {
            background: none;
            border: none;
            color: #ecf0f1;
            font-size: 22px;
            cursor: pointer;
            position: relative;
            padding: 8px;
            transition: all 0.3s ease;
        }

        .icon-btn:hover {
            color: #ff6b6b;
        }

        .notification-badge {
            position: absolute;
            top: 4px;
            right: 4px;
            background: #ff6b6b;
            color: white;
            font-size: 10px;
            font-weight: bold;
            width: 18px;
            height: 18px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .sell-btn {
            background: linear-gradient(135deg, #ff6b6b, #ff5252);
            color: white;
            border: none;
            padding: 10px 24px;
            border-radius: 8px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 14px;
        }

        .sell-btn:hover {
            background: linear-gradient(135deg, #ff5252, #ff3838);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(255, 107, 107, 0.4);
        }

        .menu-toggle {
            font-size: 24px;
            cursor: pointer;
            color: white;
            padding: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            background: rgba(255, 107, 107, 0.1);
            border-radius: 8px;
            min-width: 40px;
            min-height: 40px;
        }

        .menu-toggle:hover {
            background: rgba(255, 107, 107, 0.2);
            transform: scale(1.05);
        }

        /* Side Menu */
        .side-menu {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: #34495e;
            z-index: 200;
            padding: 24px;
            transform: translateX(-100%);
            transition: transform 0.3s ease;
            box-shadow: 4px 0 12px rgba(0, 0, 0, 0.3);
            overflow-y: auto;
            display: flex;
            flex-direction: column;
        }

        .side-menu.active {
            transform: translateX(0);
        }

        .menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 32px;
        }

        .menu-close {
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 4px;
        }

        .menu-main-content {
            flex-grow: 1;
        }

        .menu-main-content a,
        .menu-bottom-section a {
            display: block;
            padding: 14px 16px;
            color: #bdc3c7;
            text-decoration: none;
            border-radius: 8px;
            margin-bottom: 8px;
            transition: all 0.3s ease;
            font-size: 15px;
        }

        .menu-main-content a:hover,
        .menu-bottom-section a:hover {
            background: #3d566e;
            color: #ff6b6b;
            transform: translateX(4px);
        }

        .menu-bottom-section {
            margin-top: auto;
            padding-top: 24px;
            border-top: 1px solid #445566;
        }

        /* Main Content */
        main {
            flex: 1;
            padding: 40px 32px;
            max-width: 1000px;
            margin: 0 auto;
            width: 100%;
        }

        main h1 {
            text-align: center;
            font-size: 32px;
            margin-bottom: 40px;
            color: #ff6b6b;
        }

        main h2 {
            font-size: 24px;
            margin: 32px 0 16px;
            color: #ff8787;
        }

        main p {
            margin-bottom: 16px;
            line-height: 1.8;
            font-size: 15px;
        }

        main ol {
            padding-left: 24px;
            margin-bottom: 24px;
        }

        main ol li {
            margin-bottom: 20px;
            line-height: 1.7;
        }

        main strong {
            color: #ff8787;
        }

        /* Footer */
        .footer {
            background: #34495e;
            padding: 40px 32px 20px;
            margin-top: auto;
            border-top: 1px solid #445566;
        }

        .footer-content {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            margin-bottom: 24px;
        }

        .footer-section h3 {
            color: #ff6b6b;
            font-size: 16px;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .footer-section p,
        .footer-section a {
            color: #95a5a6;
            font-size: 14px;
            line-height: 1.8;
            text-decoration: none;
        }

        .footer-section a:hover {
            color: #ff6b6b;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section ul li {
            margin-bottom: 8px;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid #445566;
            color: #7f8c8d;
            font-size: 13px;
        }

        .date {
            text-align: center;
            margin-top: 50px;
            font-style: italic;
            color: #95a5a6;
        }