:root{color-scheme:dark;--bg: #0b0b0c;--bg-soft: #1a1a1d;--fg: #ffffff;--fg-dim: rgba(255, 255, 255, .65);--fg-subtle: rgba(255, 255, 255, .4);--accent: #4da3ff;--accent-soft: rgba(77, 163, 255, .16);--surface: rgba(30, 30, 32, .72);--surface-hover: rgba(50, 50, 54, .82);--border: rgba(255, 255, 255, .08)}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;overscroll-behavior-y:none}body{min-height:100dvh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,system-ui,Hiragino Sans,Noto Sans JP,sans-serif;background:radial-gradient(ellipse at top,#1a1a1f 0%,var(--bg) 60%) fixed;color:var(--fg);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent}a{color:inherit}button{font-family:inherit}#app{min-height:100dvh;display:flex;flex-direction:column}.site-header{position:sticky;top:0;z-index:50;height:56px;background:#0b0b0cb3;backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);border-bottom:1px solid var(--border)}.site-header__inner{max-width:1200px;margin:0 auto;height:100%;padding:0 16px;padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right));display:flex;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--fg);text-decoration:none;font-weight:700;font-size:17px;letter-spacing:.01em}.brand__dot{width:10px;height:10px;border-radius:50%;background:var(--accent);box-shadow:0 0 10px #4da3ffcc}.brand__name{font-weight:700}.lang-switcher{appearance:none;border:1px solid rgba(255,255,255,.18);background:transparent;color:var(--fg);padding:6px 14px;border-radius:999px;font-size:12px;font-weight:600;letter-spacing:.05em;cursor:pointer;transition:background-color .12s ease,border-color .12s ease}.lang-switcher:hover{background:#ffffff0f;border-color:#ffffff4d}.site-main{flex:1}.tool-section{position:relative;padding:20px 16px 108px;min-height:calc(100dvh - 56px);display:flex;flex-direction:column;align-items:center;gap:16px}.tool-section__intro{text-align:center;max-width:640px;user-select:text;-webkit-user-select:text}.tool-title{margin:0;font-size:clamp(22px,3.5vw,30px);font-weight:800;letter-spacing:-.01em}.tool-lead{margin:6px 0 0;color:var(--fg-dim);font-size:14px;line-height:1.55}.stage{flex:1;width:100%;display:flex;align-items:center;justify-content:center;min-height:0}.phone-frame{position:relative;background:#f4f4f5;box-shadow:0 30px 80px #0000008c,0 0 0 1px #ffffff14;overflow:hidden;touch-action:none}.phone-frame canvas{display:block;width:100%;height:100%;background:#f4f4f5;touch-action:none}.toolbar{position:absolute;left:50%;bottom:24px;transform:translate(-50%);display:flex;gap:6px;padding:6px;background:var(--surface);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);border-radius:999px;border:1px solid var(--border);box-shadow:0 8px 32px #00000080;z-index:10}.toolbar__btn{appearance:none;border:none;padding:12px 20px;border-radius:999px;background:transparent;color:var(--fg);font-size:14px;font-weight:500;cursor:pointer;touch-action:manipulation;transition:background-color .12s ease;white-space:nowrap}.toolbar__btn:hover{background:var(--surface-hover)}.toolbar__btn--primary{background:var(--accent);color:#0a1628}.toolbar__btn--primary:hover{background:#6fb5ff}.bg-control{position:relative;display:inline-flex}.bg-popover{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);min-width:160px;padding:6px;background:var(--surface);backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);border:1px solid var(--border);border-radius:14px;box-shadow:0 8px 32px #00000080;display:flex;flex-direction:column;gap:2px;z-index:20}.bg-popover[hidden]{display:none}.bg-popover__row,.bg-popover__action{appearance:none;border:none;background:transparent;color:var(--fg);font-family:inherit;font-size:14px;font-weight:500;text-align:left;padding:10px 14px;border-radius:10px;cursor:pointer;display:flex;align-items:center;gap:10px;touch-action:manipulation;transition:background-color .12s ease}.bg-popover__row:hover,.bg-popover__action:hover{background:var(--surface-hover)}.bg-popover__row.is-active,.bg-popover__action.is-active{background:var(--accent-soft);color:var(--accent)}.bg-popover__color{appearance:none;-webkit-appearance:none;width:24px;height:24px;padding:0;border:1px solid var(--border);border-radius:6px;background:transparent;cursor:pointer}.shape-swatch{width:22px;height:22px;flex:0 0 auto;color:var(--fg-dim)}.crop-dialog{position:fixed;inset:0;z-index:1000;display:flex;flex-direction:column;background:#08080af5;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);padding-left:env(safe-area-inset-left);padding-right:env(safe-area-inset-right)}.crop-dialog__header{flex:0 0 auto;padding:14px 20px;text-align:center;border-bottom:1px solid var(--border)}.crop-dialog__title{font-size:15px;font-weight:600;letter-spacing:.02em}.crop-dialog__stage{flex:1 1 auto;min-height:0;position:relative;display:flex;align-items:center;justify-content:center;overflow:hidden}.crop-dialog__canvas{display:block;max-width:100%;max-height:100%;touch-action:none;cursor:grab}.crop-dialog__canvas:active{cursor:grabbing}.crop-dialog__shapes{flex:0 0 auto;display:flex;gap:8px;padding:10px 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20px;border-radius:14px;background:var(--surface);color:var(--fg);font-size:15px;font-weight:600;font-family:inherit;cursor:pointer;touch-action:manipulation;transition:background-color .12s ease}.crop-dialog__btn:hover{background:var(--surface-hover)}.crop-dialog__btn--primary{background:var(--accent);color:#0a1628}.crop-dialog__btn--primary:hover{background:#6fb5ff}.bg-popover__color::-webkit-color-swatch-wrapper{padding:0}.bg-popover__color::-webkit-color-swatch{border:none;border-radius:4px}.how-to{max-width:820px;width:100%;margin:0 auto;padding:64px 16px 32px;user-select:text;-webkit-user-select:text}.how-to__title{text-align:center;font-size:clamp(22px,3vw,26px);font-weight:700;margin:0 0 28px}.how-to__list{list-style:none;padding:0;margin:0;display:grid;gap:12px;counter-reset:step}.how-to__list li{position:relative;background:#ffffff0a;border:1px solid var(--border);border-radius:14px;padding:18px 20px 18px 64px;counter-increment:step}.how-to__list li:before{content:counter(step);position:absolute;left:18px;top:50%;transform:translateY(-50%);width:32px;height:32px;background:var(--accent-soft);color:var(--accent);border-radius:50%;display:grid;place-items:center;font-weight:700;font-size:14px}.how-to__list strong{display:block;color:var(--fg);font-size:15px;font-weight:600;margin-bottom:4px}.how-to__list span{color:var(--fg-dim);font-size:14px;line-height:1.55}.site-footer{padding:28px 16px calc(28px + env(safe-area-inset-bottom));border-top:1px solid var(--border);color:var(--fg-subtle);font-size:13px;user-select:text;-webkit-user-select:text}.site-footer__inner{max-width:1200px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:10px}.site-footer__copy{letter-spacing:.02em}.site-footer__nav{display:flex;gap:20px;flex-wrap:wrap;justify-content:center}.site-footer__nav a{color:var(--fg-dim);text-decoration:none;transition:color .12s ease}.site-footer__nav a:hover{color:var(--fg)}.drop-overlay{position:fixed;inset:0;display:none;place-items:center;background:#4da3ff2e;border:3px dashed rgba(77,163,255,.8);color:var(--fg);font-size:20px;font-weight:600;pointer-events:none;z-index:100}.drop-overlay--active{display:grid}.selection-box{position:absolute;top:0;left:0;pointer-events:none;border:1.5px solid var(--accent);box-shadow:0 0 0 1px #0003,0 0 12px #4da3ff66;transform-origin:50% 50%;z-index:5;will-change:transform,width,height}.selection-handle{position:absolute;width:22px;height:22px;background:#fff;border:2px solid var(--accent);border-radius:50%;box-shadow:0 2px 6px #0000004d;pointer-events:auto;touch-action:none;cursor:pointer}.selection-handle--nw{top:0;left:0;transform:translate(-50%,-50%);cursor:nwse-resize}.selection-handle--ne{top:0;right:0;transform:translate(50%,-50%);cursor:nesw-resize}.selection-handle--sw{bottom:0;left:0;transform:translate(-50%,50%);cursor:nesw-resize}.selection-handle--se{bottom:0;right:0;transform:translate(50%,50%);cursor:nwse-resize}.selection-delete{position:absolute;top:0;left:0;width:36px;height:36px;padding:0;border:none;border-radius:50%;background:#ff3b30;color:#fff;display:grid;place-items:center;cursor:pointer;pointer-events:auto;touch-action:manipulation;box-shadow:0 4px 12px #0006;z-index:6;transition:background-color .12s ease}.selection-delete:hover{background:#ff6b60}.selection-delete:active{background:#e6342a}.selection-delete svg{width:18px;height:18px}.selection-delete[hidden],.selection-rotate[hidden]{display:none}.selection-rotate{position:absolute;top:0;left:0;width:32px;height:32px;border:2px solid var(--accent);border-radius:50%;background:#fff;color:var(--accent);display:grid;place-items:center;cursor:grab;pointer-events:auto;touch-action:none;box-shadow:0 2px 6px #0000004d;z-index:6}.selection-rotate:active{cursor:grabbing}.selection-rotate svg{width:16px;height:16px}@media(max-width:520px){.tool-lead{display:none}.tool-section{padding:14px 12px 100px}.toolbar__btn{padding:10px 16px;font-size:13px}.site-header__inner{padding:0 12px}.how-to{padding:48px 12px 24px}}