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

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #f5f5f5;
            overflow-x: hidden;
        }

        /* Announcement */
        .top-announcement-bar {
            width: 100%;
            background: linear-gradient(90deg, #2563eb, #1e40af);
            color: white;
            font-weight: 600;
            font-size: 1rem;
            padding: 0.6rem 1.5rem;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 0.8rem;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.5);
            position: relative;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            user-select: none;
            z-index: 1002;
        }

        .announcement-number {
            background: #fbbf24;
            color: #1e40af;
            font-weight: 700;
            padding: 0.3rem 0.9rem;
            border-radius: 20px;
            min-width: 40px;
            text-align: center;
            font-size: 1.1rem;
            box-shadow: 0 0 8px #fbbf24;
            text-transform: uppercase;
            letter-spacing: 1px;
            flex-shrink: 0;
            transition: background 0.3s ease, color 0.3s ease;
        }

        .announcement-link {
            color: #fbbf24;
            font-weight: 700;
            text-decoration: none;
            transition: color 0.3s ease, text-decoration 0.3s ease;
        }

        .announcement-link:hover,
        .announcement-link:focus {
            color: #fde68a;
            text-decoration: underline;
            outline: none;
        }

        /* Header Styles */
        header {
            background-color: #fff;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            position: relative;
            width: 100%;
            top: 0;
            z-index: 1000;
        }

        nav {
            max-width: 1200px;
            margin: 0 auto;
            padding: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo h1 {
            color: #2563eb;
            font-size: 1.8rem;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            color: #333;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.3s;
            padding: 0.5rem 1rem;
            border-radius: 5px;
        }

        .nav-links a:hover {
            color: #2563eb;
            background: rgba(37, 99, 235, 0.1);
        }

        /* Mobile Menu Toggle Button */
        .mobile-menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            padding: 8px;
            border-radius: 6px;
            transition: all 0.3s ease;
            background: rgba(37, 99, 235, 0.1);
        }

        .mobile-menu-toggle:hover {
            background: rgba(37, 99, 235, 0.2);
            transform: scale(1.05);
        }

        .hamburger-line {
            width: 25px;
            height: 3px;
            background: #2563eb;
            border-radius: 3px;
            transition: all 0.3s ease;
            transform-origin: center;
        }

        .hamburger-line:not(:last-child) {
            margin-bottom: 4px;
        }

        /* Mobile Menu Animation States */
        .mobile-menu-toggle.active .hamburger-line:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }

        .mobile-menu-toggle.active .hamburger-line:nth-child(2) {
            opacity: 0;
            transform: translateX(-20px);
        }

        .mobile-menu-toggle.active .hamburger-line:nth-child(3) {
            transform: rotate(-45deg) translate(7px, -7px);
        }

        /* Mobile Menu Overlay */
        .mobile-menu-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100vh;
            background: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(10px);
            z-index: 999;
            opacity: 0;
            visibility: hidden;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .mobile-menu-overlay.active {
            opacity: 1;
            visibility: visible;
        }

        /* Mobile Menu Panel */
        .mobile-menu-panel {
            position: fixed;
            top: 0;
            right: -100%;
            width: 80%;
            max-width: 300px;
            height: 100vh;
            background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
            z-index: 1001;
            padding: 2rem;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            box-shadow: -10px 0 30px rgba(0, 0, 0, 0.3);
        }

        .mobile-menu-panel.active {
            right: 0;
        }

        /* Mobile Menu Header */
        .mobile-menu-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 3rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        }

        .mobile-menu-header h2 {
            color: white;
            font-size: 1.5rem;
            font-weight: 700;
        }

        .mobile-menu-close {
            background: none;
            border: none;
            color: white;
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: 50%;
            transition: all 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
        }

        .mobile-menu-close:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: rotate(90deg);
        }

        /* Mobile Menu Items */
        .mobile-menu-items {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }

        .mobile-menu-items a {
            color: white;
            text-decoration: none;
            padding: 1rem 1.5rem;
            border-radius: 12px;
            transition: all 0.3s ease;
            font-weight: 500;
            font-size: 1.1rem;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .mobile-menu-items a::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: rgba(255, 255, 255, 0.15);
            transition: left 0.3s ease;
            border-radius: 12px;
        }

        .mobile-menu-items a:hover::before {
            left: 0;
        }

        .mobile-menu-items a:hover {
            transform: translateX(8px);
            background: rgba(255, 255, 255, 0.1);
        }

        .mobile-menu-items a i {
            font-size: 1.2rem;
            width: 20px;
            text-align: center;
        }

        /* Old mobile menu hide */
        .mobile-menu {
            display: none;
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(rgba(37, 99, 235, 0.9), rgba(30, 64, 175, 0.9)),
                url('https://images.unsplash.com/photo-1454165804606-c3d57bc86b40?auto=format&fit=crop&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 8rem 2rem 4rem;
            text-align: center;
        }

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

        .hero h1 {
            font-size: 3rem;
            margin-bottom: 1rem;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .hero p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
        }

        .search-container {
            margin-top: 2rem;
            display: flex;
            justify-content: center;
            gap: 0.5rem;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
            padding: 0 1rem;
        }

        .search-container input {
            padding: 1rem;
            width: 100%;
            border: none;
            border-radius: 5px;
            font-size: 1rem;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            min-width: 0;
        }

        .search-container button {
            padding: 1rem 2rem;
            background: #1e40af;
            border: none;
            border-radius: 5px;
            color: white;
            cursor: pointer;
            transition: background 0.3s;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .search-container button:hover {
            background: #1e3a8a;
        }

        /* Filters Section */
        .filters {
            padding: 2rem;
            background: white;
            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
        }

        .filter-container {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .filter-btn {
            padding: 0.75rem 1.5rem;
            border: 2px solid #e5e7eb;
            border-radius: 25px;
            background: white;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            min-width: 120px;
        }

        .filter-btn:hover {
            background: #2563eb;
            color: white;
            border-color: #2563eb;
        }

        .filter-btn.active {
            background: #2563eb;
            color: white;
            border-color: #2563eb;
            box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
        }

        /* Calculator Grid */
        .calculator-grid {
            max-width: 1200px;
            margin: 2rem auto;
            padding: 0 2rem;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 2rem;
        }

        .calculator-card {
            background: white;
            border-radius: 15px;
            padding: 2rem;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .calculator-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
        }

        .calculator-card i {
            font-size: 2.5rem;
            color: #2563eb;
            margin-bottom: 1rem;
        }

        .calculator-card h3 {
            color: #1f2937;
            margin-bottom: 0.5rem;
        }

        .calculator-card p {
            color: #6b7280;
            margin-bottom: 1.5rem;
        }

        .card-btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background: #2563eb;
            color: white;
            text-decoration: none;
            border-radius: 25px;
            transition: all 0.3s;
            font-weight: 500;
        }

        .card-btn:hover {
            background: #1e40af;
            transform: translateY(-2px);
        }

        /* Footer */
        footer {
            background: #1f2937;
            color: white;
            padding: 4rem 2rem 1rem;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
        }

        .footer-section h3 {
            margin-bottom: 1rem;
            color: #f3f4f6;
        }

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

        .footer-section ul li {
            margin-bottom: 0.5rem;
        }

        .footer-section a {
            color: #e5e7eb;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: white;
        }

        .social-links {
            margin-top: 1rem;
        }

        .social-links a {
            margin-right: 1rem;
            font-size: 1.5rem;
            color: #e5e7eb;
            transition: color 0.3s;
        }

        .social-links a:hover {
            color: #2563eb;
        }

        .footer-bottom {
            margin-top: 2rem;
            padding-top: 1rem;
            text-align: center;
            border-top: 1px solid #374151;
            color: #9ca3af;
        }

        /* Responsive Design */
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }

            .mobile-menu-toggle {
                display: flex;
            }

            .hero h1 {
                font-size: 2rem;
            }

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

            .filter-container {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 0.75rem;
            }

            .filter-btn {
                width: 100%;
                padding: 0.5rem 1rem;
                font-size: 0.9rem;
                text-align: center;
            }

            .calculator-grid {
                grid-template-columns: 1fr;
                padding: 0 1rem;
            }

            .mobile-menu-panel {
                width: 90%;
                max-width: 350px;
            }


        }

        @media (max-width: 480px) {
            .filter-container {
                grid-template-columns: 1fr;
            }

            .hero {
                padding: 6rem 1rem 3rem;
            }

            .search-container button {
                padding: 1rem;
            }

            .mobile-menu-panel {
                width: 100%;
                max-width: none;
                padding: 1.5rem;
            }

            nav {
                padding: 0.75rem;
            }

            .top-announcement-bar {
                flex-direction: column;
                gap: 0.4rem;
                padding: 0.8rem 1rem;
                font-size: 0.95rem;
                text-align: center;
            }

            .announcement-number {
                font-size: 0.95rem;
                padding: 0.25rem 0.75rem;
            }

            .announcement-text {
                font-size: 0.95rem;
            }

            .announcement-link {
                font-size: 0.95rem;
                word-break: break-word;
            }

        }