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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
            color: white;
            overflow-x: hidden;
            line-height: 1.6;
        }

        .hero-howTo {
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
            padding: 2rem;
        }

        .hero-howTo::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23ffffff" stroke-width="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
            opacity: 0.1;
            animation: float 20s ease-in-out infinite;
        }

        @keyframes float {
            0%, 100% { transform: translateY(0px) rotate(0deg); }
            50% { transform: translateY(-20px) rotate(1deg); }
        }

        .hero-content {
            text-align: center;
            position: relative;
            z-index: 2;
            max-width: 800px;
        }

        .hero-content h1 {
            font-size: 3.5rem;
            font-weight: 900;
            background: linear-gradient(45deg, #ff6b6b, #feca57, #48cae4);
            background-size: 200% 200%;
            background-clip: text;
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            animation: gradient 3s ease infinite;
            margin-bottom: 1rem;
            line-height: 1.1;
        }

        @keyframes gradient {
            0% { background-position: 0% 50%; }
            50% { background-position: 100% 50%; }
            100% { background-position: 0% 50%; }
        }

        .hero-content p {
            font-size: 1.25rem;
            opacity: 0.9;
            margin-bottom: 2rem;
        }

        .main-content-howTo {
            padding: 4rem 2rem;
            max-width: 1200px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .steps-container {
            display: flex;
            flex-direction: column;
            gap: 4rem;
        }

        .step {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
            padding: 3rem;
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 24px;
            transition: all 0.3s ease;
        }

        .step:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
        }

        .step:nth-child(even) {
            background: rgba(255, 107, 107, 0.05);
            border-color: rgba(255, 107, 107, 0.2);
        }

        .step:nth-child(even) .step-content {
            order: 2;
        }

        .step:nth-child(even) .step-image {
            order: 1;
        }

        .step-number {
            display: inline-block;
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #ff6b35, #ff4500);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 900;
            margin-bottom: 1.5rem;
            box-shadow: 0 8px 20px rgba(255, 107, 53, 0.4);
        }

        .step:nth-child(even) .step-number {
            background: linear-gradient(135deg, #48cae4, #0096c7);
            box-shadow: 0 8px 20px rgba(72, 202, 228, 0.4);
        }

        .step h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: #fff;
        }

        .step p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 1.5rem;
            line-height: 1.7;
        }

        .step-features {
            list-style: none;
            padding: 0;
        }

        .step-features li {
            display: flex;
            align-items: center;
            margin-bottom: 0.75rem;
            font-size: 1rem;
        }

        .step-features li::before {
            content: '✓';
            width: 20px;
            height: 20px;
            background: linear-gradient(135deg, #48cae4, #0096c7);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
            font-size: 0.8rem;
            font-weight: bold;
        }

        .step-image {
            position: relative;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            /* padding: 2rem; */
            display: flex;
            align-items: center;
            justify-content: center;
            min-height: 300px;
            border: 2px dashed rgba(255, 255, 255, 0.3);
            transition: all 0.3s ease;
        }

        .step-image:hover {
            border-color: rgba(255, 107, 107, 0.5);
            background: rgba(255, 107, 107, 0.1);
        }

        .screenshot-placeholder {
            text-align: center;
            color: rgba(255, 255, 255, 0.6);
        }

        .screenshot-placeholder .icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            display: block;
        }

        .screenshot-placeholder p {
            font-size: 1rem;
            font-weight: 600;
        }

        .step img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }

        .quick-overview {
            background: rgba(254, 202, 87, 0.1);
            border: 1px solid rgba(254, 202, 87, 0.3);
            border-radius: 20px;
            padding: 3rem;
            margin-bottom: 4rem;
            text-align: center;
        }

        .quick-overview h2 {
            font-size: 2.5rem;
            font-weight: 800;
            color: #feca57;
            margin-bottom: 1rem;
        }

        .quick-overview p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 2rem;
        }

        .overview-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1.5rem;
            margin-top: 2rem;
        }

        .overview-step {
            background: rgba(255, 255, 255, 0.05);
            padding: 1.5rem;
            border-radius: 12px;
            text-align: center;
        }

        .overview-step .number {
            display: inline-block;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, #feca57, #ff6b6b);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin-bottom: 1rem;
            margin: 0 auto 1rem auto;
        }

        .overview-step h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .overview-step p {
            font-size: 0.9rem;
            opacity: 0.8;
        }

        .cta-section {
            background: rgba(255, 107, 107, 0.1);
            border: 1px solid rgba(255, 107, 107, 0.3);
            border-radius: 20px;
            padding: 3rem;
            text-align: center;
            margin-top: 4rem;
        }

        .cta-section h2 {
            font-size: 2.5rem;
            font-weight: 800;
            margin-bottom: 1rem;
            color: #ff6b6b;
        }

        .cta-section p {
            font-size: 1.2rem;
            opacity: 0.9;
            margin-bottom: 2rem;
        }

        .cta-button {
            display: inline-block;
            padding: 1.5rem 3rem;
            background: linear-gradient(135deg, #ff6b35, #ff4500);
            color: white;
            text-decoration: none;
            border-radius: 12px;
            font-size: 1.2rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .cta-button::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.5s;
        }

        .cta-button:hover::before {
            left: 100%;
        }

        .cta-button:hover {
            background: linear-gradient(135deg, #ff4500, #e63e00);
            transform: translateY(-3px);
            box-shadow: 0 15px 35px rgba(255, 107, 53, 0.4);
        }

        @media (max-width: 768px) {
            .hero-content h1 {
                font-size: 2.5rem;
            }

            .main-content {
                padding: 2rem 1rem;
            }

            .step {
                grid-template-columns: 1fr;
                gap: 2rem;
                padding: 2rem;
            }

            .step:nth-child(even) .step-content {
                order: 1;
            }

            .step:nth-child(even) .step-image {
                order: 2;
            }

            .step h2 {
                font-size: 1.5rem;
            }

            .overview-steps {
                grid-template-columns: 1fr;
            }

            .quick-overview,
            .cta-section {
                padding: 2rem;
            }

            .quick-overview h2,
            .cta-section h2 {
                font-size: 2rem;
            }
        }

        /* lightbox effect */
body.lightbox-open{
    overflow: hidden;
}

        .screenshot {
  max-width: 100%;
  cursor: zoom-in;
  transition: 0.2s;
  border: 1px solid #ccc;
  border-radius: 8px;
}

#lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  padding: 20px;
  box-sizing: border-box;

}

#lightbox.hidden {
  display: none;
}

#lightbox img {
  max-width: 100%;
  max-height: 90vh;
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
}

#lightbox-close {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 40px;
  color: white;
  cursor: pointer;
  user-select: none;
}

.screenshot-row {
  display: flex;
  overflow-x: auto;
  gap: 12px;
  padding: 10px 0;
  position: relative;
}

.scrollable-thumb {
  width: 200px;
  height: auto;
  cursor: pointer;
  border-radius: 4px;
  box-shadow: 0 0 5px rgba(0,0,0,0.2);
  transition: transform 0.2s ease;
}

.scrollable-thumb:hover {
  transform: scale(1.05);
}

/* Optional arrow indicator */
.screenshot-row::after {
  content: "→";
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 24px;
  color: rgba(0, 0, 0, 0.4);
  pointer-events: none;
}
.screenshot-row::after {
  content: "→";
  display: none;
}

.screenshot-row.scrollable::after {
  display: block;
}