:root{--bg-color:#121212;--panel-bg:#1e1e1e;--text-color:#e0e0e0;--accent-color:#bb86fc;--accent-hover:#9965db;--border-color:#333}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;font-family:Noto Sans JP,sans-serif;line-height:1.6}button{cursor:pointer;color:inherit;background:0 0;border:none;font-family:inherit}input,select{font-family:inherit}.app-container{flex-direction:column;min-height:100vh;display:flex}.header{text-align:center;background-color:var(--panel-bg);border-bottom:1px solid var(--border-color);padding:1.5rem;box-shadow:0 4px 6px #0000004d}.header h1{letter-spacing:2px;color:var(--accent-color);text-transform:uppercase;font-family:Impact,sans-serif;font-size:2rem}.main-content{flex:1;gap:2rem;width:100%;max-width:1400px;margin:0 auto;padding:2rem;display:flex}.sidebar{background-color:var(--panel-bg);border-radius:12px;flex-direction:column;flex:1;gap:1.5rem;min-width:300px;padding:1.5rem;display:flex;box-shadow:0 4px 12px #0003}.preview-area{flex-direction:column;flex:2;justify-content:flex-start;align-items:center;gap:1.5rem;display:flex}.control-group{flex-direction:column;gap:.5rem;display:flex}.control-group label{color:#aaa;font-size:.9rem;font-weight:700}.text-input,.select-input,.color-input{border:1px solid var(--border-color);color:#fff;background-color:#2a2a2a;border-radius:6px;padding:.75rem;font-size:1rem;transition:border-color .2s}.text-input:focus,.select-input:focus{border-color:var(--accent-color);outline:none}.color-input{cursor:pointer;width:100%;height:40px;padding:0}.template-grid{grid-template-columns:repeat(3,1fr);gap:.75rem;display:grid}.template-item{aspect-ratio:1;object-fit:cover;cursor:pointer;border:2px solid #0000;border-radius:6px;width:100%;transition:transform .2s,border-color .2s}.template-item:hover{transform:scale(1.05)}.template-item.selected{border-color:var(--accent-color)}.upload-btn{color:#fff;text-align:center;cursor:pointer;border:1px dashed var(--accent-color);background-color:#333;border-radius:6px;padding:.75rem;font-weight:700;transition:background-color .2s}.upload-btn:hover{background-color:#444}.canvas-container{background-color:#000;border-radius:12px;justify-content:center;align-items:center;max-width:100%;display:flex;overflow:hidden;box-shadow:0 8px 24px #00000080}canvas{max-width:100%;height:auto;display:block}.action-btn{background-color:var(--accent-color);color:#000;text-transform:uppercase;letter-spacing:1px;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;width:100%;max-width:400px;padding:1rem 2rem;font-size:1.2rem;font-weight:900;transition:transform .1s,background-color .2s;display:flex}.action-btn:hover:not(:disabled){background-color:var(--accent-hover);transform:translateY(-2px)}.action-btn:active:not(:disabled){transform:translateY(0)}.action-btn:disabled{color:#888;cursor:not-allowed;background-color:#555}.progress-container{text-align:center;width:100%;max-width:400px}.progress-bar{background-color:#333;border-radius:5px;width:100%;height:10px;margin-top:.5rem;overflow:hidden}.progress-fill{background-color:var(--accent-color);height:100%;transition:width .1s linear}.result-image{border-radius:12px;max-width:100%;box-shadow:0 8px 24px #00000080}@media (width<=768px){.main-content{flex-direction:column-reverse;padding:1rem}.sidebar{min-width:100%}.template-grid{grid-template-columns:repeat(4,1fr)}}@media (width<=480px){.template-grid{grid-template-columns:repeat(3,1fr)}}