:root{--bg: #f4f5f7;--surface: #ffffff;--text: #1c2733;--text-sub: #5b6774;--line: #dde2e8;--accent: #e8a10a;--accent-ink: #3a2a00;--accent-soft: #fdf3dc;--primary: #1c2733;--primary-text: #ffffff;--danger: #c0392b;--danger-soft: #fdecea;--ok: #1e7e46;--radius: 14px;--shadow: 0 1px 3px rgba(16, 24, 32, .08)}@media (prefers-color-scheme: dark){:root{--bg: #12181f;--surface: #1c2530;--text: #eef2f6;--text-sub: #9aa7b4;--line: #313d4a;--accent: #f0b429;--accent-ink: #f7dfa0;--accent-soft: #33290f;--primary: #f0b429;--primary-text: #1c1300;--danger: #e57366;--danger-soft: #3a1f1c;--shadow: 0 1px 3px rgba(0, 0, 0, .4)}}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:Hiragino Kaku Gothic ProN,Hiragino Sans,Yu Gothic UI,Noto Sans JP,Meiryo,system-ui,sans-serif;font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}.app{min-height:100vh;min-height:100dvh;display:flex;flex-direction:column}.app-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10;padding-top:env(safe-area-inset-top)}.app-header-inner{display:flex;align-items:center;gap:10px;max-width:720px;margin:0 auto;padding:12px 16px 4px}.app-mark{color:var(--accent);display:inline-flex}.app-header h1{font-size:1.15rem;margin:0;letter-spacing:.06em}.tab-bar{display:flex;gap:2px;max-width:720px;margin:0 auto;padding:0 8px;overflow-x:auto;-webkit-overflow-scrolling:touch}.tab-btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;color:var(--text-sub);font-size:.95rem;padding:10px 14px 12px;border-bottom:3px solid transparent;cursor:pointer;white-space:nowrap;font-family:inherit}.tab-btn.active{color:var(--text);font-weight:700;border-bottom-color:var(--accent)}.tab-btn:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.app-main{flex:1;width:100%;max-width:720px;margin:0 auto;padding:16px 16px calc(32px + env(safe-area-inset-bottom))}.calc-layout,.settings-layout{display:flex;flex-direction:column;gap:16px}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:18px}.card h2{margin:0 0 8px;font-size:1.05rem}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:20px}.field:last-child{margin-bottom:0}.field label,.field-label{font-weight:700;font-size:.95rem}.field input[type=text],.field select{font-size:1.2rem;font-family:inherit;padding:13px 14px;border:1.5px solid var(--line);border-radius:10px;background:var(--surface);color:var(--text);width:100%;min-height:52px}.field input:focus-visible,.field select:focus-visible{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.input-unit{display:flex;align-items:center;gap:10px}.input-unit input{flex:1;min-width:0}.unit{color:var(--text-sub);font-weight:700;flex-shrink:0}.field-row{display:flex;gap:12px}.field-row .field{flex:1}.hint{color:var(--text-sub);font-size:.85rem;margin:4px 0 0}.warn-text{color:var(--danger)}.segmented{display:flex;border:1.5px solid var(--line);border-radius:12px;overflow:hidden}.segmented button{flex:1;-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:transparent;color:var(--text-sub);font-size:1.05rem;font-family:inherit;padding:14px 8px;min-height:52px;cursor:pointer}.segmented button.active{background:var(--accent);color:var(--accent-ink);font-weight:700}.segmented button:focus-visible{outline:2px solid var(--accent);outline-offset:-3px}.btn-row{display:flex;gap:12px;margin-top:4px}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1.5px solid var(--line);background:var(--surface);color:var(--text);font-size:1.05rem;font-weight:700;font-family:inherit;padding:14px 20px;min-height:52px;border-radius:12px;cursor:pointer}.btn:active{transform:translateY(1px)}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn.primary{background:var(--primary);border-color:var(--primary);color:var(--primary-text);flex:1}.btn.ghost{background:transparent}.btn.danger{color:var(--danger);border-color:var(--danger);background:transparent}.btn.small{font-size:.9rem;padding:8px 14px;min-height:40px}.btn.icon{padding:8px 12px;min-height:40px;min-width:44px;font-size:1rem}.btn:disabled{opacity:.4;cursor:default}.result-area{display:flex;flex-direction:column;gap:16px}.notice p,.error p{margin:0}.error{border-color:var(--danger);background:var(--danger-soft);color:var(--danger);font-weight:700}.total-card{background:var(--accent-soft);border:2px solid var(--accent);text-align:center;padding:22px 18px}.total-label{display:block;font-size:1rem;font-weight:700;color:var(--text-sub);letter-spacing:.08em}.total-value{display:flex;align-items:baseline;justify-content:center;gap:8px;flex-wrap:wrap}.total-number{font-size:clamp(3.4rem,18vw,5.2rem);font-weight:800;line-height:1.1;font-variant-numeric:tabular-nums;color:var(--text);word-break:break-all}.total-unit{font-size:1.3rem;font-weight:700;color:var(--text-sub)}.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:0}.result-grid dt{font-size:.85rem;color:var(--text-sub);margin-bottom:2px}.result-grid dd{margin:0;font-size:1.35rem;font-weight:800;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.result-meta{margin-top:16px;padding-top:12px;border-top:1px dashed var(--line);color:var(--text-sub);font-size:.85rem}.result-meta p{margin:4px 0}.caution{color:var(--danger);font-weight:700}.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.section-head h2{margin:0}.cardboard-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}.cardboard-item{border:1px solid var(--line);border-radius:12px;padding:12px}.cardboard-item.disabled{opacity:.65}.cardboard-row{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.cardboard-title{display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-width:0}.thickness-badge,.prov-badge,.off-badge{font-size:.75rem;padding:2px 8px;border-radius:999px;white-space:nowrap}.thickness-badge{background:var(--bg);color:var(--text-sub);border:1px solid var(--line)}.prov-badge{background:var(--accent-soft);color:var(--accent-ink);border:1px solid var(--accent);font-weight:700}.off-badge{background:var(--danger-soft);color:var(--danger);border:1px solid var(--danger)}.cardboard-actions{display:flex;gap:6px;flex-shrink:0}.cardboard-editor{margin-top:14px;padding-top:14px;border-top:1px dashed var(--line);display:flex;flex-direction:column;gap:4px}.base-box{border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:16px;background:var(--bg)}.base-title{margin:0 0 8px;font-weight:700;font-size:.9rem}.checkbox-field label{display:flex;align-items:center;gap:10px;font-weight:400;font-size:1rem}.checkbox-field input[type=checkbox]{width:22px;height:22px;accent-color:var(--accent)}.help-list{margin:0;padding-left:1.4em}.help-list li{margin-bottom:6px}.help-text{margin:0 0 8px;color:var(--text)}@media (min-width: 640px){.calc-layout{display:grid;grid-template-columns:1fr 1fr;align-items:start}}@media (max-width: 380px){body{font-size:16px}.field-row{flex-direction:column;gap:0}}@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}