:root {
        /* Cores principais - Dark Theme */
        --primary: #2563eb;
        --primary-dark: #1d4ed8;
        --secondary: #8b5cf6;
        --accent: #10b981;
        --warning: #f59e0b;
        --danger: #ef4444;
        --success: #10b981;

        /* Backgrounds */
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;

        /* Textos */
        --text-primary: #f8fafc;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;

        /* Bordas */
        --border: #475569;
        --border-light: #64748b;

        /* Gradientes */
        --gradient-primary: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
        --gradient-secondary: linear-gradient(135deg, #10b981 0%, #0ea5e9 100%);
        --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #fbbf24 100%);

        /* Sombras */
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
        --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
        --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

        /* Transições */
        --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
        --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
        --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    }

        /* Light Theme Variables */
        .light-theme {
            --bg-primary: #ffffff;
            --bg-secondary: #f8fafc;
            --bg-tertiary: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #334155;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --border-light: #cbd5e1;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            transition: background-color var(--transition), color var(--transition);
        }

        /* Typography */
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.2;
        }

        .text-gradient {
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            display: inline-block;
        }

        /* Custom Container */
        .custom-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

       /* ============================================
       NAVIGAÇÃO SIMPLES (Corrigido)
       ============================================ */
    .simple-nav {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        padding: 1rem 1.5rem;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border);
        z-index: 1000;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .light-theme .simple-nav {
        background: rgba(255, 255, 255, 0.95);
    }

    .nav-buttons {
        display: flex;
        gap: 0.75rem;
        align-items: center;
    }

        /* Demo Hero Section */
        .demo-hero {
            min-height: 70vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.9) 100%);
              margin-top: 3rem;        
        }

        .light-theme .demo-hero {
            background: linear-gradient(135deg, rgba(248, 250, 252, 0.9) 0%, rgba(241, 245, 249, 0.9) 100%);
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: 
                radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
            z-index: -1;
        }

        .project-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            padding: 0.5rem 1.25rem;
            border-radius: 2rem;
            font-weight: 500;
            margin-bottom: 1.5rem;
            border: 1px solid rgba(37, 99, 235, 0.2);
        }

        .light-theme .project-badge {
            background: rgba(37, 99, 235, 0.05);
        }

        /* Demo Preview */
        .demo-preview {
            background: var(--bg-secondary);
            border-radius: 1rem;
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-xl);
            transition: transform var(--transition);
           
        }

        .demo-preview:hover {
            transform: translateY(-5px);
        }

        .demo-browser-bar {
            background: var(--bg-tertiary);
            padding: 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            border-bottom: 1px solid var(--border);
        }

        .browser-dots {
            display: flex;
            gap: 0.5rem;
        }

        .browser-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
        }

        .dot-red { background: #ef4444; }
        .dot-yellow { background: #f59e0b; }
        .dot-green { background: #10b981; }

        .browser-url {
            flex: 1;
            background: var(--bg-primary);
            border: 1px solid var(--border);
            border-radius: 0.5rem;
            padding: 0.5rem 1rem;
            font-size: 0.875rem;
            color: var(--text-secondary);
            font-family: 'Courier New', monospace;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .demo-frame {
            height: 500px;
            overflow: hidden;
            position: relative;
        }

        .demo-frame iframe {
            width: 100%;
            height: 100%;
            border: none;
        }

        .demo-placeholder {
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, var(--bg-primary) 25%, var(--bg-secondary) 25%, 
                      var(--bg-secondary) 50%, var(--bg-primary) 50%, 
                      var(--bg-primary) 75%, var(--bg-secondary) 75%, var(--bg-secondary));
            background-size: 40px 40px;
            animation: placeholderShimmer 2s linear infinite;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
        }

        @keyframes placeholderShimmer {
            0% { background-position: 0 0; }
            100% { background-position: 40px 40px; }
        }

        /* Project Stats */
        .stats-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 1rem;
            padding: 1.5rem;
            text-align: center;
            transition: all var(--transition);
            height: 100%;
        }

        .stats-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary);
        }

        .stats-icon {
            width: 48px;
            height: 48px;
            background: var(--gradient-primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.25rem;
            margin: 0 auto 1rem;
        }

        .stats-number {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.25rem;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        /* Rating Stars */
        .rating-container {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .stars {
            display: flex;
            gap: 0.125rem;
        }

        .star {
            color: var(--text-muted);
            font-size: 1.25rem;
            transition: color var(--transition);
            position: relative;
        }

        .star.filled {
            color: #fbbf24;
        }

        .star.half-filled::before {
            content: '★';
            position: absolute;
            width: 50%;
            overflow: hidden;
            color: #fbbf24;
        }

        /* Skills Tags */
        .skills-container {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
        }

        .skill-tag {
            background: var(--bg-tertiary);
            color: var(--text-secondary);
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            font-size: 0.875rem;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            transition: all var(--transition);
            border: 1px solid transparent;
        }

        .skill-tag:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-2px);
            border-color: var(--primary);
        }

        .skill-tag i {
            font-size: 1rem;
        }

        /* Project Gallery */
        .gallery-item {
            position: relative;
            border-radius: 0.75rem;
            overflow: hidden;
            cursor: pointer;
            transition: transform var(--transition);
            height: 200px;
        }

        .gallery-item:hover {
            transform: scale(1.03);
        }

        .gallery-item img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .gallery-item:hover img {
            transform: scale(1.1);
        }

        .gallery-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(15, 23, 42, 0.8);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity var(--transition);
        }

        .light-theme .gallery-overlay {
            background: rgba(255, 255, 255, 0.8);
        }

        .gallery-item:hover .gallery-overlay {
            opacity: 1;
        }

        /* Features List */
        .feature-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem;
            background: var(--bg-secondary);
            border: 1px solid var(--border);
            border-radius: 0.75rem;
            margin-bottom: 1rem;
            transition: all var(--transition);
        }

        .feature-item:hover {
            border-color: var(--primary);
            transform: translateX(5px);
        }

        .feature-icon {
            width: 40px;
            height: 40px;
            background: var(--gradient-primary);
            border-radius: 0.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            flex-shrink: 0;
        }

        /* Quote Card */
        .quote-card {
            background: var(--bg-secondary);
            border-left: 4px solid var(--primary);
            border-radius: 0.75rem;
            padding: 2rem;
            position: relative;
        }

        .quote-card::before {
            content: '"';
            position: absolute;
            top: 1rem;
            left: 1rem;
            font-size: 4rem;
            color: var(--primary);
            opacity: 0.2;
            font-family: Georgia, serif;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 2rem;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--gradient-primary);
        }

        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
            padding-left: 2rem;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -1.5rem;
            top: 0.5rem;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg-secondary);
        }

        /* Contact Form */
        .contact-form {
            background: var(--bg-secondary);
            border-radius: 1rem;
            padding: 2rem;
            border: 1px solid var(--border);
        }

        .form-control {
            background: var(--bg-primary);
            border: 1px solid var(--border);
            color: var(--text-primary);
            padding: 0.75rem 1rem;
            border-radius: 0.5rem;
            transition: all var(--transition);
        }

        .form-control:focus {
            background: var(--bg-primary);
            border-color: var(--primary);
            color: var(--text-primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .form-label {
            color: var(--text-secondary);
            font-weight: 500;
            margin-bottom: 0.5rem;
        }

         /* ============================================
       BOTÕES (Totalmente padronizados)
       ============================================ */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 0.75rem;
        padding: 0.75rem 2rem;
        font-size: 0.875rem;
        font-weight: 600;
        border-radius: 0.75rem;
        border: 2px solid transparent;
        cursor: pointer;
        transition: all var(--transition);
        text-decoration: none;
        position: relative;
        overflow: hidden;
        z-index: 1;
    }

    .btn::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 0;
        height: 100%;
        background: rgba(255, 255, 255, 0.1);
        transition: width var(--transition);
        z-index: -1;
    }

    .btn:hover::before {
        width: 100%;
    }

    .btn-primary {
        background: var(--gradient-primary);
        color: white;
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: var(--shadow-xl);
        color: white;
    }

    .btn-outline {
        background: transparent;
        border-color: var(--border);
        color: var(--text-primary);
    }

    .btn-outline:hover {
        border-color: var(--primary);
        color: var(--primary);
        transform: translateY(-2px);
    }

    .btn-icon {
        width: 48px;
        height: 48px;
        padding: 0;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--gradient-primary);
        color: white;
        border: none;
    }

    .btn-icon:hover {
        transform: scale(1.1) rotate(180deg);
    }

    .btn-sm {
        padding: 0.5rem 1.5rem;
        font-size: 0.8125rem;
    }

    .btn-lg {
        padding: 1rem 2.5rem;
        font-size: 1rem;
    }

        /* Progress Bars */
        .progress {
            height: 8px;
            background: var(--bg-tertiary);
            border-radius: 4px;
            overflow: hidden;
        }

        .progress-bar {
            background: var(--gradient-primary);
            border-radius: 4px;
            transition: width 1s ease-in-out;
        }

        /* Theme Toggle */
        .theme-toggle {
            width: 48px;
            height: 48px;
            background: var(--gradient-primary);
            border: none;
            border-radius: 50%;
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            cursor: pointer;
            transition: all var(--transition);
            margin-left: 1rem;
        }

        .theme-toggle:hover {
            transform: scale(1.1) rotate(180deg);
        }

        /* Footer */
        .demo-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border);
            padding: 3rem 0 1.5rem;
        }

        /* Custom Animations */
        @keyframes float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }

        .floating-element {
            animation: float 3s ease-in-out infinite;
        }

        /* Selection */
        ::selection {
            background: var(--primary);
            color: white;
        }

        /* Scrollbar */
        ::-webkit-scrollbar {
            width: 10px;
        }

        ::-webkit-scrollbar-track {
            background: var(--bg-secondary);
        }

        ::-webkit-scrollbar-thumb {
            background: var(--primary);
            border-radius: 5px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary-dark);
        }

        /* Responsive Adjustments */
        @media (max-width: 768px) {
            .demo-frame {
                height: 300px;
            }

            .project-badge {
                font-size: 0.875rem;
                padding: 0.375rem 1rem;
            }

            .stats-number {
                font-size: 1.5rem;
            }

            .timeline {
                padding-left: 1.5rem;
            }

            .timeline-item {
                padding-left: 1.5rem;
            }

            .demo-hero {
                padding: 4rem 0;
                display: block;
            }
        }

        @media (max-width: 576px) {
            .demo-hero {
                min-height: 60vh;
                padding: 3rem 0;
            }

            .demo-frame {
                height: 250px;
            }

            .gallery-item {
                height: 150px;
            }

            .btn {
                padding: 0.625rem 1.5rem;
                font-size: 0.875rem;
            }
        }

        /* Fixes for Bootstrap conflicts */
        .bg-dark {
            background-color: var(--bg-tertiary) !important;
        }

        .text-muted {
            color: var(--text-muted) !important;
        }

        .card {
            background-color: var(--bg-secondary);
            border-color: var(--border);
            color: var(--text-primary);
        }

        .card-title {
            color: var(--text-primary);
        }

        .card-text {
            color: var(--text-secondary);
        }

        .badge.bg-primary {
            background: var(--gradient-primary) !important;
            border: none;
        }

        .badge.bg-success {
            background-color: var(--success) !important;
        }