:root{font-family:Roboto,'Noto Sans JP','Yu Gothic UI',system-ui,sans-serif;color:#111827;background:#fff;font-synthesis:none;--bg:#fff;--surface:#f8fafc;--secondary:#f3f4f6;--border:#e5e7eb;--accent:#64748b;--soft:#e2e8f0;--primary:#111827;--primaryText:#fff;--sub:#6b7280}*{box-sizing:border-box}body{margin:0;background:var(--bg)}body.dark{--bg:#0b1220;--surface:#0f172a;--secondary:#1f2937;--border:#334155;--accent:#e2e8f0;--soft:#334155;--primary:#e5eaf2;--primaryText:#0b1220;--sub:#cbd5e1;color:#f8fafc}button,input,select{font:inherit;color:inherit}button{cursor:pointer;border:none;background:var(--secondary);border-radius:12px;font-weight:600;font-size:15px;min-height:54px;padding:8px 10px}button:hover{filter:brightness(.96)}button:focus-visible,a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input:focus-visible,select:focus-visible{outline:2px solid var(--accent)}button:disabled{opacity:.45;cursor:not-allowed}[hidden]{display:none!important}.app-header{height:64px;display:flex;align-items:center;gap:6px;padding:0 12px 0 16px;background:var(--bg)}h1{font-size:18px;font-weight:600;margin:0;flex:1}.menu-button{background:transparent;font-size:23px;width:48px;min-height:48px;padding:0;font-weight:400}.back-button{background:transparent;font-size:24px;min-height:48px;width:44px;padding:0}.app-header #edit-target{font-size:12px;color:var(--accent);margin-left:auto}.input-layout{padding:4px 10px;display:flex;flex-direction:column;gap:6px;height:calc(100dvh - 64px);min-height:600px}.expression-input{height:96px;padding:2px 10px}.expression-row{display:flex;gap:6px;align-items:center}.expression-row input{height:56px;border:none;background:transparent;font-size:28px;text-align:right;min-width:0;flex:1;outline:none}.expression-row input::placeholder{font-size:21px;color:var(--sub);opacity:1}.backspace{width:48px;min-height:54px;background:var(--soft);color:#7f1d1d;font-size:23px;border:1px solid var(--border)}#live-preview{height:32px;overflow:auto;text-align:right;white-space:pre;font-size:18px;font-weight:600;color:var(--sub);padding:2px 58px 0 4px}.edit-button{min-height:56px;width:100%;background:var(--soft);border:1px solid var(--border);font-size:14px;border-radius:10px}.key-panel{display:flex;flex:1;flex-direction:column;gap:4px;min-height:0}.key-row{display:flex;gap:6px}.key-row button{flex:1;min-width:0;position:relative}.key-row .selected,.function-tabs .active{background:var(--primary);color:var(--primaryText);border-color:var(--primary)}.matrix-key-row button{background:var(--bg);border:1px solid var(--border)}.locked{opacity:.48}.locked small{position:absolute;right:8px;top:6px;font-size:9px}.function-tabs{display:flex;gap:6px;overflow:auto;min-height:52px;padding:2px 0;flex-shrink:0;scrollbar-width:thin}.function-tabs button{white-space:nowrap;min-height:48px;padding:6px 15px;font-size:14px}.function-keys{overflow:auto;display:flex;flex-direction:column;gap:6px;padding-bottom:8px;flex:1;min-height:0}.function-keys .wide-key{width:100%}.calculate-bar{padding:4px 6px max(4px,env(safe-area-inset-bottom));margin-top:auto}.calculate-button{width:100%;background:var(--primary);color:var(--primaryText);min-height:56px;border-radius:16px;font-size:16px}.edit-layout{display:flex;flex-direction:column;padding:4px 10px;gap:6px;height:calc(100dvh - 64px);min-height:620px}.matrix-area{display:flex;flex:1;min-height:0;flex-direction:column;gap:6px}.matrix-area>.key-row{flex-shrink:0}.matrix-area .key-row button{font-size:14px;min-height:48px}.matrix-clear{text-align:right;height:31px}.text-button{background:transparent;min-height:28px;border-radius:5px;font-size:13px;padding:4px 8px;color:var(--accent)}.matrix-preview{flex:1;min-height:110px;display:flex;gap:8px;border:1px solid var(--border);background:var(--surface);border-radius:14px;padding:8px 10px;overflow:hidden}.matrix-preview>strong{min-width:36px;padding-top:6px;font-size:16px}.matrix-scroll{overflow:auto;flex:1}.matrix-editor{display:grid;gap:8px;width:max-content;margin:0 auto}.matrix-editor input{width:60px;height:60px;border:1px solid var(--border);border-radius:8px;background:var(--bg);text-align:center;font-size:18px;padding:4px;outline:none}.matrix-editor input.selected{border:2px solid var(--primary);background:var(--soft)}.matrix-pad{max-height:360px;overflow:auto;flex-shrink:0;display:flex;flex-direction:column;gap:6px}.matrix-pad>.key-row button{background:var(--soft)}#cell-keypad{display:flex;flex-direction:column;gap:6px}.matrix-pad button{min-height:44px;font-size:15px}#cell-keypad .key-row button{min-height:44px}.document-view{padding:16px;max-width:1000px;margin:0 auto}.result-card{border:1px solid var(--border);border-radius:16px;padding:18px;margin-bottom:14px;background:var(--bg)}h2{font-size:18px;margin:0 0 14px;font-weight:600}h3{font-size:15px;margin:16px 0 10px}.result-top{display:flex;align-items:center;justify-content:space-between;gap:10px}.result-top label{font-size:12px;color:var(--sub)}select{background:var(--bg);border:1px solid var(--border);border-radius:7px;padding:6px;font-size:13px}.result-body{overflow:auto}.result-expression{font-size:20px;overflow-wrap:anywhere;margin:10px 0 20px}.scalar-result{font-size:28px;overflow-wrap:anywhere;margin:10px 0 20px}.output-matrix{border-left:2px solid var(--accent);border-right:2px solid var(--accent);border-radius:5px;border-spacing:14px 10px;text-align:center;white-space:nowrap;font-size:18px;margin:10px 0}.output-label{font-size:14px;color:var(--sub);margin-top:18px}.result-actions{display:flex;flex-direction:column;gap:8px;margin-top:20px}.button{min-height:44px;background:var(--secondary);border:1px solid var(--border);font-size:14px}.steps{border-top:1px solid var(--border);padding-top:15px;margin-top:20px}.steps summary{cursor:pointer;font-size:14px}.step-label{font-size:13px;color:var(--sub);margin-top:15px}.section-toolbar{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:16px}.section-toolbar h2{margin:0}.record-list{display:grid;gap:10px}.record{width:100%;background:var(--bg);border:1px solid var(--border);border-radius:14px;padding:18px;display:flex;gap:18px;align-items:center;justify-content:space-between;text-align:left}.record strong{font-size:20px}.record small{font-size:11px;color:var(--sub)}.record p{font-size:13px;font-weight:400;max-width:60vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.saved-grid{display:grid;gap:14px}.saved-card{border:1px solid var(--border);border-radius:14px;padding:18px;overflow:auto}.saved-card h3{overflow-wrap:anywhere}.saved-card .text-button{margin-left:10px}.list-empty{font-size:14px;text-align:center;padding:48px 10px;color:var(--sub)}#saved-summary{font-size:13px;color:var(--sub)}.error{border:1px solid #fecaca;background:#fef2f2;color:#7f1d1d;border-radius:10px;padding:14px;line-height:1.8;font-size:14px}dialog{background:var(--bg);color:inherit;border:1px solid var(--border);border-radius:20px;padding:28px;max-width:600px;width:calc(100vw - 32px);max-height:90dvh;box-shadow:0 15px 70px #0002}dialog::backdrop{background:#0005}.dialog-close{position:absolute;right:10px;top:8px;background:transparent;font-size:24px;width:40px;min-height:40px}dialog h2{padding-right:20px}dialog p,dialog li{font-size:13px;color:var(--sub);line-height:1.9}dialog code{background:var(--secondary);padding:2px 4px;border-radius:4px;color:inherit}dialog input{display:block;width:100%;margin:8px 0 15px;padding:10px;border:1px solid var(--border);border-radius:8px;background:var(--bg)}dialog label{font-size:13px}dialog .calculate-button{margin-top:12px}dialog a{color:var(--accent)}.drawer{position:fixed;inset:0 0 0 auto;margin:0;width:300px;max-width:85vw;height:100dvh;max-height:none;border-radius:24px 0 0 24px;padding:24px;background:var(--surface)}.drawer p{margin-top:0}.drawer>button{display:block;width:100%;text-align:left;min-height:48px;background:var(--surface);margin-top:10px;padding-left:16px;font-size:16px}.drawer>button:hover{background:var(--soft)}.drawer>small{display:block;text-align:center;color:var(--sub);font-size:12px;margin-top:30px}.operations-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.operations-grid button{font-size:13px;min-height:48px}.theme-options{display:flex;gap:8px}.theme-options button{flex:1;font-size:13px}.empty-result{font-size:14px;color:var(--sub)}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);max-width:90vw;width:max-content;padding:12px 20px;border-radius:8px;background:#374151;color:white;font-size:13px;opacity:0;pointer-events:none;z-index:30}#toast.visible{opacity:1}
@media(orientation:landscape) and (min-width:700px){.app-header{height:48px;padding-left:12px}h1{font-size:16px}.input-layout{height:calc(100dvh - 48px);min-height:470px;padding:4px 8px;display:grid;grid-template-columns:40fr 60fr;grid-template-rows:1fr auto;gap:4px}.expression-area{grid-column:1;grid-row:1;padding-right:0}.key-panel{grid-column:2;grid-row:1/3;gap:4px}.calculate-bar{grid-column:1;grid-row:2;padding:4px}.calculate-button{min-height:64px;font-size:15px}.expression-row input{font-size:22px}.expression-row input::placeholder{font-size:16px}.key-row{gap:4px}.function-tabs{gap:4px}.function-tabs button{font-size:12px;padding:4px 10px}.function-keys{gap:4px}.key-panel .key-row button{font-size:13px}.edit-layout{height:calc(100dvh - 48px);min-height:420px;display:grid;grid-template-columns:58fr 42fr;gap:4px;padding:4px 8px}.matrix-pad{max-height:none;flex-shrink:1}.matrix-pad button,#cell-keypad .key-row button{min-height:46px}.saved-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-height:700px) and (orientation:portrait){.key-panel .key-row button{min-height:46px}.function-tabs button{min-height:42px}.function-tabs{min-height:46px}.matrix-pad button,#cell-keypad .key-row button{min-height:38px}}
.input-layout,.edit-layout{min-height:0}.expression-area,.calculate-bar{flex-shrink:0}.key-panel{overflow:auto}.key-panel>.key-row{flex-shrink:0}.function-keys{flex:none;overflow:visible;min-height:200px}.matrix-pad{max-height:48dvh}.edit-layout .matrix-preview{min-height:80px}
@media(orientation:landscape) and (min-width:700px){.matrix-pad{max-height:none}}
.menu-links{margin-top:18px;padding-top:14px;border-top:1px solid var(--border);display:grid;gap:12px}.menu-links>a{display:block;padding:13px 16px;border-radius:14px;color:inherit;text-decoration:none;font-size:16px;font-weight:600}.menu-links>a:hover{background:var(--soft)}.menu-links>a>span[aria-hidden],.android-promo strong span{float:right}.menu-links .android-promo{border:1px solid var(--border);background:var(--bg)}.android-promo strong{display:block;font-size:16px}.android-promo>span{display:block;margin-top:7px;color:var(--sub);font-size:12px;font-weight:400}.android-promo small{display:block;font-size:12px;margin-top:12px;color:var(--accent)}
.app-invite{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:0 0 8px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--surface)}.app-invite strong{display:block;font-size:12px;font-weight:600}.app-invite div>span{display:block;margin-top:3px;color:var(--sub);font-size:10px;line-height:1.5}.app-invite>a{flex-shrink:0;display:inline-flex;align-items:center;gap:5px;min-height:40px;padding:8px 10px;border-radius:8px;background:var(--soft);color:inherit;text-decoration:none;font-size:12px;font-weight:600}.app-invite>a:hover{filter:brightness(.96)}.app-invite>a:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.app-invite{flex-wrap:wrap;gap:6px}.app-invite>div{flex:1 0 145px}.app-invite>a{flex:1 0 auto;min-width:230px;white-space:nowrap;justify-content:center;text-align:center;font-size:11px;min-height:36px}
.app-invite{position:relative}.app-invite>div{padding-right:25px}.app-invite .invite-close{position:absolute;top:3px;right:3px;width:32px;min-height:32px;padding:0;background:transparent;border-radius:8px;color:var(--sub);font-size:22px;font-weight:400;line-height:1}.app-invite .invite-close:hover{background:var(--soft)}