:root{--bg:#f5f7fb;--surface:#ffffff;--soft:#eaf2ff;--text:#1f2d3d;--muted:#657386;--line:#d8e0ec;--primary:#2563eb;--primary-dark:#1d4ed8;--warning:#fff4df;--warning-border:#edae49;--danger:#b95045;--share-blue:#0f4fb8;--shadow:0 18px 44px rgba(32,54,92,0.13)}*{box-sizing:border-box}html{background:var(--bg);color:var(--text);font-size:17px}body{margin:0;font-family:Arial,Hiragino Sans,Yu Gothic,Meiryo,sans-serif;letter-spacing:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer}.mobile-shell{margin:0 auto;max-width:560px;min-height:100vh;padding:18px 14px 34px}.with-nav{padding-bottom:104px}.app-header{align-items:flex-start;display:flex;gap:14px;justify-content:space-between;margin-bottom:16px}.app-header h1,.auth-card h1,.detail-hero h1{font-size:2.15rem;line-height:1.12;margin:4px 0 0}.eyebrow{color:var(--primary);font-size:.9rem;font-weight:800;margin:0}.auth-card 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