:root{--mg-navy:#1d1d1f;--mg-navy-mid:#2c2c2e;--mg-navy-light:#3a3a3c;--mg-accent:#0071e3;--mg-accent-hover:#0077ed;--mg-accent-soft:#f0f7ff;--mg-accent-border:#cce4ff;--mg-success:#248a3d;--mg-success-soft:#f0fdf4;--mg-warning:#9a6700;--mg-warning-soft:#fffbeb;--mg-danger:#d70015;--mg-danger-soft:#fff5f5;--mg-bg:#f5f5f7;--mg-bg-subtle:#ebebed;--mg-surface:#ffffff;--mg-surface-raised:#fafafa;--mg-border:rgba(0,0,0,0.08);--mg-border-strong:rgba(0,0,0,0.14);--mg-text:#1d1d1f;--mg-text-secondary:#424245;--mg-muted:#6e6e73;--mg-radius:12px;--mg-radius-lg:16px;--mg-radius-xl:20px;--mg-shadow-sm:0 1px 2px rgba(0,0,0,0.04);--mg-shadow:0 4px 24px rgba(0,0,0,0.06);--mg-shadow-lg:0 12px 40px rgba(0,0,0,0.08);--mg-font:-apple-system,BlinkMacSystemFont,"SF Pro Text","SF Pro Display","Hiragino Sans","Noto Sans JP","Segoe UI",sans-serif;--mg-mono:ui-monospace,"SF Mono",Menlo,monospace;--mg-header-h:52px;--mg-footer-h:88px}*{box-sizing:border-box}.mg-root{min-height:100vh;min-height:100dvh;background:var(--mg-bg);font-family:var(--mg-font);font-size:15px;line-height:1.47;letter-spacing:-.01em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.mg-header,.mg-root{color:var(--mg-text)}.mg-header{position:sticky;top:0;z-index:200;background:rgba(255,255,255,.78);backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:.5px solid var(--mg-border-strong)}.mg-header-inner{max-width:720px;margin:0 auto;padding:0 max(16px,env(safe-area-inset-left)) 0 max(16px,env(safe-area-inset-right))}.mg-header-row{justify-content:space-between;min-height:var(--mg-header-h);gap:12px}.mg-brand,.mg-header-row{display:flex;align-items:center}.mg-brand{gap:10px;text-decoration:none;color:inherit;min-width:0}.mg-brand-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(145deg,#1d1d1f,#3a3a3c);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:11px;letter-spacing:-.04em;flex-shrink:0}.mg-brand-text{min-width:0}.mg-brand-title{font-size:15px;font-weight:600;line-height:1.2;letter-spacing:-.02em}.mg-brand-sub{font-size:11px;color:var(--mg-muted);margin-top:1px;font-weight:400}.mg-header-meta{display:flex;align-items:center;gap:10px;flex-shrink:0}.mg-step-pill{font-size:13px;font-weight:600;font-variant-numeric:tabular-nums;color:var(--mg-text);background:var(--mg-bg);padding:6px 11px;border-radius:999px;border:.5px solid var(--mg-border-strong)}.mg-step-pill-sep{color:var(--mg-muted);font-weight:400;margin:0 2px}.mg-header-nav{display:flex;align-items:center;gap:4px}.mg-header-link{color:var(--mg-accent);font-size:13px;font-weight:500;text-decoration:none;padding:6px 8px;border-radius:8px}.mg-header-link:hover{background:var(--mg-accent-soft)}.mg-header-progress{height:3px;background:var(--mg-bg-subtle);border-radius:0 0 2px 2px;overflow:hidden}.mg-header-progress-fill{height:100%;background:var(--mg-accent);border-radius:0 2px 2px 0;transition:width .4s ease}.mg-sys-details{max-width:720px;margin:0 auto;border-bottom:.5px solid var(--mg-border);background:var(--mg-surface)}.mg-sys-details-summary{list-style:none;cursor:pointer;padding:8px max(16px,env(safe-area-inset-left));font-size:12px;font-weight:500;color:var(--mg-muted);user-select:none}.mg-sys-details-summary::-webkit-details-marker{display:none}.mg-sys-details[open] .mg-sys-details-summary{color:var(--mg-text-secondary);border-bottom:.5px 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4px;display:flex;gap:8px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none}.mg-step-rail-scroll::-webkit-scrollbar{display:none}.mg-step-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 14px 8px 10px;border-radius:999px;background:var(--mg-surface);border:.5px solid var(--mg-border);flex-shrink:0;opacity:.55;box-shadow:var(--mg-shadow-sm)}.mg-step-chip.is-done{opacity:.85}.mg-step-chip.is-clickable{cursor:pointer}.mg-step-chip.is-clickable:active{transform:scale(.98)}.mg-step-chip.is-done .mg-step-chip-num{background:var(--mg-success-soft);color:var(--mg-success)}.mg-step-chip.is-current{opacity:1;border-color:var(--mg-accent-border);background:var(--mg-accent-soft);box-shadow:0 0 0 1px 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