/* Dark Theme Variables */
        :root {
            --primary: #3b82f6;
            --primary-dark: #2563eb;
            --dark-bg: #0f172a;
            --darker-bg: #020617;
            --card-bg: #1e293b;
            --text: #e2e8f0;
            --text-muted: #94a3b8;
            --border: #334155;
            --error: #ef4444;
        }
        
        /* Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        body {
            background-color: var(--dark-bg);
            color: var(--text);
            line-height: 1.6;
        }
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        a {
            text-decoration: none;
            color: var(--primary);
        }
        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: var(--primary);
            color: white;
            border-radius: 6px;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }
        .btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* Header */
        header {
            background-color: var(--darker-bg);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            gap: 30px;
        }
        .nav-links a {
            font-weight: 500;
            color: var(--text);
            transition: color 0.3s ease;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text);
            cursor: pointer;
        }

        /* Optimize Research Page */
        .optimize-research {
            padding: 60px 0;
            min-height: calc(100vh - 160px);
        }
        .page-header {
            text-align: center;
            margin-bottom: 40px;
        }
        .page-header h1 {
            font-size: 2.5rem;
            margin-bottom: 15px;
            background: linear-gradient(to right, var(--primary), var(--text));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .page-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }
        .research-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }
        .research-description {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .description-card {
            background: var(--card-bg);
            border-radius: 10px;
            padding: 25px;
            border-left: 4px solid var(--primary);
        }
        .description-card h2 {
            color: var(--primary);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .description-card p {
            margin-bottom: 15px;
            line-height: 1.7;
            color: var(--text-muted);
        }
        .process-steps {
            list-style: none;
            counter-reset: step-counter;
        }
        .process-steps li {
            position: relative;
            padding-left: 40px;
            margin-bottom: 20px;
            counter-increment: step-counter;
        }
        .process-steps li::before {
            content: counter(step-counter);
            position: absolute;
            left: 0;
            top: 0;
            background: var(--primary);
            color: white;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
        }
        .process-steps strong {
            color: var(--text);
            display: block;
            margin-bottom: 5px;
        }
        .research-form-container {
            position: relative;
        }
        .form-card {
            background: var(--card-bg);
            border-radius: 10px;
            padding: 25px;
            position: sticky;
            top: 20px;
        }
        .form-card h2 {
            margin-bottom: 20px;
            color: var(--text);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text);
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            background: var(--darker-bg);
            border: 1px solid var(--border);
            border-radius: 6px;
            color: var(--text);
            font-size: 1rem;
        }
        .form-group textarea {
            min-height: 150px;
            resize: vertical;
        }
        .hint {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 5px;
        }
        .input-error {
            border-color: var(--error) !important;
        }
        .error-message {
            color: var(--error);
            font-size: 0.85rem;
            margin-top: 5px;
            display: none;
        }

        /* Footer */
        footer {
            background-color: var(--darker-bg);
            border-top: 1px solid var(--border);
            padding: 40px 0;
        }
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
        }
        .footer-logo {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--primary);
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .social-links {
            display: flex;
            gap: 15px;
        }
        .social-links a {
            font-size: 20px;
            transition: color 0.3s ease;
        }
        .social-links a:hover {
            color: var(--primary);
        }
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .research-container {
                grid-template-columns: 1fr;
            }
            .form-card {
                position: static;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--card-bg);
                padding: 20px;
                border-top: 1px solid var(--border);
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
            }
            .nav-links.active {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .page-header h1 {
                font-size: 2rem;
            }
            .description-card {
                padding: 20px;
            }
        }



        /* Alert Styles */
.alert-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
    max-width: 350px;
}

.alert.show {
    opacity: 1;
    transform: translateX(0);
}

.alert-success {
    background-color: #10b981;
    color: white;
}

.alert-error {
    background-color: var(--error);
    color: white;
}

.alert-icon {
    font-size: 20px;
}

.alert-close {
    margin-left: auto;
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    font-size: 16px;
    opacity: 0.8;
}

.alert-close:hover {
    opacity: 1;
}