.iphone-container,.top-bar{display:flex;background:var(--color-background)}.guide-header h1,body{background:var(--primary-gradient)}.guide-header h1,.step-content h3{margin-bottom:10px}.step-content h3,body{color:var(--color-text-dark)}:root{--primary-gradient:linear-gradient(135deg, #667eea 0%, #764ba2 100%);--border-radius-xl:40px;--border-radius-lg:20px;--border-radius-md:15px;--shadow-sm:0 2px 10px rgba(0, 0, 0, 0.05);--shadow-md:0 4px 15px rgba(0, 0, 0, 0.1);--shadow-lg:0 8px 25px rgba(0, 0, 0, 0.2);--color-primary:#667eea;--color-secondary:#764ba2;--color-text-dark:#1d1d1f;--color-text-light:#666;--color-background:#f5f5f7;--color-white:#ffffff;--step-size:32px}.subtitle,.video-caption{color:var(--color-text-light)}*{margin:0;padding:0;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}body{min-height:100vh;display:flex;justify-content:center;align-items:center;padding:20px}.iphone-container{width:100%;max-width:550px;height:100vh;border-radius:var(--border-radius-xl);box-shadow:var(--shadow-lg);flex-direction:column;overflow:hidden}.top-bar{align-items:center;justify-content:space-between;padding:20px;border-bottom:1px solid rgba(0,0,0,.05);position:sticky;top:0;z-index:100}.back-button,.refresh-button,.step-item{background:var(--color-white);display:flex}.back-button,.refresh-button{width:40px;height:40px;border-radius:50%;border:none;box-shadow:var(--shadow-sm);cursor:pointer;align-items:center;justify-content:center;transition:.3s}.back-button:hover,.refresh-button:hover{transform:scale(1.05);box-shadow:var(--shadow-md)}.content-wrapper{flex:1;overflow-y:auto;padding:20px}.guide-header{text-align:center;margin-bottom:30px}.guide-header h1{font-size:24px;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.subtitle{font-size:16px}.video-section{margin-bottom:40px}.video-container{position:relative;padding-bottom:56.25%;height:0;overflow:hidden;border-radius:var(--border-radius-md);box-shadow:var(--shadow-md)}.step-image,.step-item{box-shadow:var(--shadow-sm)}.video-container iframe{position:absolute;top:0;left:0;width:100%;height:100%;border:none}.video-caption{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:15px}.steps-container{display:flex;flex-direction:column;gap:30px}.step-item{gap:20px;padding:20px;border-radius:var(--border-radius-lg)}.step-number{width:var(--step-size);height:var(--step-size);background:var(--primary-gradient);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content{flex:1}.step-content p{color:var(--color-text-light);margin-bottom:15px;line-height:1.6}.step-image{border-radius:var(--border-radius-md);overflow:hidden}.step-image img{width:100%;height:auto;display:block;transition:transform .3s}.step-image img:hover{transform:scale(1.02)}@media (max-width:480px){.guide-header h1{font-size:20px}.step-content p,.subtitle{font-size:14px}.step-item{padding:15px}.step-content h3{font-size:16px}}