:root{--background:#f7f8fa;--surface:#fff;--surface-muted:#f0f2f5;--text:#17202a;--text-muted:#5f697a;--border:#e4e7ec;--brand:#c92f3b;--brand-dark:#bd2430;--accent:#ffcb05;--sidebar:#151b26;--sidebar-muted:#98a2b3;--shadow:0 12px 32px #17202a14}*{box-sizing:border-box}html{background:var(--background);min-width:320px}body{min-height:100vh;color:var(--text);background:var(--background);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Noto Sans JP,sans-serif}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}.app-shell{min-height:100vh}.sidebar{display:none}.content-column{min-width:0}.mobile-header{z-index:10;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#f7f8faeb;border-bottom:1px solid #e4e7eccc;align-items:center;height:60px;padding:0 20px;display:flex;position:sticky;top:0}.mobile-brand,.brand{align-items:center;gap:10px;display:inline-flex}.brand-mark{background:linear-gradient(to bottom, var(--brand) 0 46%, var(--text) 46% 54%, white 54% 100%);border:2px solid;border-radius:50%;flex:none;width:28px;height:28px;position:relative;overflow:hidden}.brand-mark:after{border:2px solid var(--text);content:"";background:#fff;border-radius:50%;width:7px;height:7px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.main-content{width:min(100%,1120px);margin:0 auto;padding:28px 20px 104px}.bottom-nav{z-index:20;padding:8px 8px max(8px, env(safe-area-inset-bottom));border-top:1px solid var(--border);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);background:#fffffff5;grid-template-columns:repeat(4,1fr);display:grid;position:fixed;bottom:0;left:0;right:0;box-shadow:0 -8px 24px #17202a0f}.bottom-nav a{min-width:0;color:var(--text-muted);flex-direction:column;align-items:center;gap:3px;padding:4px 2px;font-size:.68rem;font-weight:650;display:flex}.bottom-nav svg,.sidebar-nav svg{stroke:currentColor;stroke-width:1.8px;stroke-linecap:round;stroke-linejoin:round;width:22px;height:22px}.page-heading{flex-direction:column;align-items:flex-start;gap:20px;margin-bottom:28px;display:flex}.page-heading h1{letter-spacing:-.04em;margin:4px 0 8px;font-size:clamp(1.75rem,5vw,2.5rem);line-height:1.18}.page-heading p{max-width:640px;color:var(--text-muted);margin:0;line-height:1.75}.page-heading .eyebrow{color:var(--brand);letter-spacing:.12em;text-transform:uppercase;font-size:.75rem;font-weight:800}.primary-button{color:#fff;background:var(--brand);border-radius:12px;justify-content:center;align-items:center;min-height:44px;padding:0 18px;font-size:.9rem;font-weight:750;transition:background .16s,transform .16s;display:inline-flex;box-shadow:0 8px 18px #e6394638}.primary-button:hover{background:var(--brand-dark);transform:translateY(-1px)}.login-card{border:1px solid var(--border);background:var(--surface);min-height:320px;box-shadow:var(--shadow);text-align:center;border-radius:22px;flex-direction:column;justify-content:center;align-items:center;padding:48px 24px;display:flex}.login-card h2{margin:0 0 8px}.login-card>p{color:var(--text-muted);margin:0;line-height:1.7}.login-actions{width:min(100%,320px);margin-top:28px}.google-login-button{border:1px solid var(--border);width:100%;min-height:48px;color:var(--text);cursor:pointer;background:#fff;border-radius:12px;justify-content:center;align-items:center;gap:12px;padding:0 20px;font-weight:750;display:inline-flex;box-shadow:0 6px 16px #17202a14}.google-login-button:disabled{cursor:wait;opacity:.65}.google-login-button svg{width:20px;height:20px}.form-error{font-size:.85rem;color:var(--brand-dark)!important;margin-top:16px!important}.sign-out-button{color:inherit;cursor:pointer;background:0 0;border:0;padding:6px 0;font-size:.72rem;font-weight:700}.mobile-sign-out{margin-left:auto}.metric-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-bottom:28px;display:grid}.metric-card{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:18px;padding:18px}.metric-card span{color:var(--text-muted);font-size:.75rem;font-weight:650}.metric-card strong{letter-spacing:-.04em;margin-top:8px;font-size:clamp(1.5rem,5vw,2.2rem);display:block}.empty-state{background:var(--surface);text-align:center;border:1px dashed #cbd0d8;border-radius:22px;flex-direction:column;justify-content:center;align-items:center;min-height:280px;padding:48px 24px;display:flex}.empty-state-mark{border:12px solid var(--accent);width:48px;height:48px;box-shadow:inset 0 0 0 2px var(--text);border-radius:50%;margin-bottom:18px}.empty-state h2{margin:0 0 8px;font-size:1.1rem}.empty-state p{max-width:420px;color:var(--text-muted);margin:0;font-size:.9rem;line-height:1.7}.deck-filter{border:1px solid var(--border);background:var(--surface-muted);border-radius:12px;gap:4px;margin-bottom:20px;padding:4px;display:inline-flex}.visually-hidden{clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.deck-form,.deck-image-panel,.archive-panel{border:1px solid var(--border);background:var(--surface);border-radius:18px;min-width:0;padding:24px}.deck-form fieldset{border:0;min-width:0;margin:0;padding:0}.form-field{gap:8px;margin-bottom:22px;display:grid}.form-field label{font-weight:700}.form-field input,.form-field select,.form-field textarea{border:1px solid var(--border);background:var(--surface);width:100%;min-width:0;color:var(--text);border-radius:8px;padding:12px}.form-field textarea{resize:vertical}.form-field [aria-invalid=true]{border-color:var(--brand)}.form-field small,.archive-panel p,.deck-image-panel p{color:var(--text-muted);line-height:1.7}.field-required{color:var(--brand-dark);margin-left:8px;font-size:.75rem}.form-actions{flex-wrap:wrap;gap:12px;display:flex}.secondary-button{border:1px solid var(--border);background:var(--surface);min-height:44px;color:var(--text);cursor:pointer;border-radius:12px;justify-content:center;align-items:center;padding:10px 18px;display:inline-flex}button.primary-button{cursor:pointer;border:0}button:disabled,fieldset:disabled button{cursor:wait;opacity:.65}input:focus-visible,textarea:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid var(--brand);outline-offset:3px}.deck-detail-grid{align-items:start;gap:24px;display:grid}.deck-image-panel h2,.archive-panel h2{margin-top:0;font-size:1.1rem}.deck-image-panel img{width:100%;height:auto;display:block}.archive-panel{margin-top:24px}.success-notice{color:#245a35;background:#eaf6ed;border-radius:10px;padding:14px 18px}.page-heading h1,.deck-card 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16px;font-size:1.15rem}.match-card{border-left:5px solid var(--border);justify-content:space-between;align-items:center;gap:16px;display:flex}.match-card.result-win{border-left-color:#2a9d6f}.match-card.result-loss{border-left-color:var(--brand)}.match-card.result-draw{border-left-color:#d59b20}.match-card h3{align-items:center;gap:10px;display:flex}.match-result-mark{border-radius:50%;flex:none;place-items:center;width:46px;height:46px;display:inline-grid}.match-result-mark svg{width:42px;height:42px;overflow:visible}.match-result-mark circle,.match-result-mark path{fill:none;stroke:currentColor;stroke-width:4.5px;stroke-linecap:round;stroke-linejoin:round}.result-win .match-result-mark{color:#176b4a;background:#e2f5ec}.result-loss .match-result-mark{color:var(--brand-dark);background:#fde8ea}.result-draw .match-result-mark{color:#8a5b00;background:#fff1c9}.danger-button{min-height:40px;color:var(--brand-dark);cursor:pointer;background:#fff;border:1px solid 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