:root{--ink: #16233D;--ink-soft: #2A3957;--paper: #F5F6F8;--card-bg: #FFFFFF;--accent: #E5402E;--accent-press: #C32C1E;--money: #0C6E4E;--muted: #5A6477;--line: #E2E5EC;--line-strong: #C9CFDA;--field-bg: #FBFCFD;--danger: #C32C1E;--shadow-card: 0 1px 2px rgba(22, 35, 61, .05), 0 12px 32px -18px rgba(22, 35, 61, .28);--radius: 14px;--font-display: "Zen Kaku Gothic New", "Noto Sans JP", sans-serif;--font-body: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "Roboto Mono", ui-monospace, "SFMono-Regular", monospace}*{box-sizing:border-box;margin:0;padding:0}button,input,select{font-family:inherit}html{-webkit-text-size-adjust:100%}body{font-family:var(--font-body);background-color:var(--paper);color:var(--ink);line-height:1.65;font-feature-settings:"palt" 1;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}header{background-color:var(--ink);color:#fff;position:sticky;top:0;z-index:100;border-bottom:1px solid rgba(255,255,255,.08)}.header-container{display:flex;justify-content:space-between;align-items:center;max-width:760px;margin:0 auto;padding:.95rem 1.15rem;gap:1rem}h1{font-family:var(--font-display);font-size:1.18rem;font-weight:900;letter-spacing:.04em;line-height:1.1;display:flex;align-items:baseline;gap:.6rem}h1:after{content:"DEAL CHECK";font-family:var(--font-mono);font-size:.6rem;font-weight:500;letter-spacing:.28em;color:var(--accent);transform:translateY(-1px)}.hamburger{background:none;border:none;cursor:pointer;display:flex;flex-direction:column;justify-content:space-between;width:26px;height:17px;padding:0}.hamburger .bar{width:100%;height:2px;background-color:#fff;border-radius:2px;transition:all .25s ease}.hamburger:hover .bar{background-color:var(--accent)}.hamburger:focus-visible{outline:2px solid var(--accent);outline-offset:5px;border-radius:2px}.sidebar{position:fixed;top:0;left:0;width:290px;max-width:84vw;height:100%;background-color:var(--ink);color:#fff;box-shadow:24px 0 60px -30px #0009;transform:translate(-100%);transition:transform .32s cubic-bezier(.22,1,.36,1);z-index:200;display:flex;flex-direction:column}.sidebar.open{transform:translate(0)}.sidebar-header{display:flex;justify-content:space-between;align-items:center;padding:1.15rem 1.25rem;border-bottom:1px solid rgba(255,255,255,.1)}.sidebar-header h2{font-family:var(--font-mono);font-size:.7rem;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:#fff9;margin:0}.close-btn{background:none;border:none;font-size:1.6rem;line-height:1;cursor:pointer;color:#ffffffb3;transition:color .2s}.close-btn:hover{color:var(--accent)}.close-btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}.sidebar ul{list-style:none;padding:.6rem 0;margin:0}.sidebar li a{display:flex;align-items:center;gap:.9rem;padding:.95rem 1.25rem;text-decoration:none;color:#ffffffd1;border-left:3px solid transparent;transition:background-color .18s,color .18s,border-color .18s}.sidebar li a:before{content:attr(data-tag);font-family:var(--font-mono);font-size:.62rem;font-weight:700;letter-spacing:.04em;color:var(--ink);background:#ffffffd9;min-width:38px;height:26px;padding:0 .4rem;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;flex-shrink:0;transition:background-color .18s,color .18s}.sidebar li a:hover,.sidebar li a:focus-visible{background-color:#ffffff0f;color:#fff;border-left-color:var(--accent);outline:none}.sidebar li a:hover:before,.sidebar li a:focus-visible:before{background:var(--accent);color:#fff}.overlay{position:fixed;inset:0;background-color:#0d14228c;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .3s ease;z-index:150}.overlay.show{opacity:1;pointer-events:auto}.container{max-width:760px;margin:2.5rem auto 4rem;padding:0 1.15rem}section{animation:rise .4s cubic-bezier(.22,1,.36,1)}.card{background-color:var(--card-bg);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-card);padding:2.1rem 2rem 2.2rem}.card h2{font-family:var(--font-display);font-size:1.55rem;font-weight:900;letter-spacing:.01em;line-height:1.25;color:var(--ink);margin:0 0 .55rem}.card h2:before{content:attr(data-eyebrow);display:block;font-family:var(--font-mono);font-size:.66rem;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);margin-bottom:.7rem}.description{margin:0 0 1.9rem;color:var(--muted);font-size:.95rem;max-width:46ch}.description:after{content:"";display:block;height:1px;background:var(--line);margin-top:1.6rem}.form-group{margin-bottom:1.4rem}label{display:block;margin-bottom:.55rem;font-weight:700;font-size:.85rem;color:var(--ink-soft);letter-spacing:.01em}input[type=number],input[type=date],select{width:100%;padding:.8rem .9rem;background:var(--field-bg);border:1.5px solid var(--line-strong);border-radius:10px;font-size:1rem;color:var(--ink);transition:border-color .18s,box-shadow .18s,background-color .18s}input[type=number]{font-family:var(--font-mono);font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:.01em}input::placeholder{color:#9aa2b1;font-family:var(--font-mono)}input:hover,select:hover{border-color:#aeb6c4}input:focus,select:focus{border-color:var(--accent);background:#fff;box-shadow:0 0 0 3px #e5402e24;outline:none}select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2316233D' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right .95rem center;padding-right:2.4rem;cursor:pointer}.primary-btn{background-color:var(--accent);color:#fff;border:none;padding:.92rem 1.6rem;border-radius:10px;font-family:var(--font-display);font-size:1rem;font-weight:700;letter-spacing:.04em;cursor:pointer;width:100%;margin-top:.4rem;box-shadow:0 8px 18px -8px #e5402e99;transition:background-color .18s,transform .08s,box-shadow .18s}.primary-btn:hover{background-color:var(--accent-press)}.primary-btn:active{transform:translateY(1px);box-shadow:0 4px 10px -6px #e5402e99}.primary-btn:focus-visible{outline:2px solid var(--ink);outline-offset:3px}.result-area{margin-top:2rem;padding:1.5rem 1.6rem 1.7rem;background:repeating-linear-gradient(-45deg,transparent 0 6px,rgba(22,35,61,.015) 6px 12px),#fff;border:1px solid var(--line);border-top:none;border-radius:0 0 6px 6px;color:var(--ink);position:relative;-webkit-mask:radial-gradient(7px 7px at 7px 0,transparent 0 6px,#000 6.5px) top left / 14px 100%;mask:radial-gradient(7px 7px at 7px 0,transparent 0 6px,#000 6.5px) top left / 14px 100%;box-shadow:0 14px 28px -20px #16233d66;animation:rise .35s cubic-bezier(.22,1,.36,1)}.result-area:before{content:"計算明細 ・ RESULT";display:block;font-family:var(--font-mono);font-size:.62rem;font-weight:700;letter-spacing:.22em;color:var(--muted);padding-bottom:.85rem;margin-bottom:.9rem;border-bottom:1.5px dashed var(--line-strong)}.result-item{display:flex;justify-content:space-between;align-items:baseline;gap:1rem;font-size:.92rem;color:var(--muted);padding:.28rem 0}.result-value{font-family:var(--font-mono);font-weight:700;font-size:1.05rem;font-variant-numeric:tabular-nums;color:var(--ink);white-space:nowrap}.result-item:last-of-type .result-value{color:var(--money)}.result-area hr{border:0!important;border-top:1.5px dashed var(--line-strong)!important;margin:.7rem 0!important}.result-error:before{content:"入力エラー ・ ERROR";color:var(--danger);border-bottom-color:#c32c1e66}.result-error-text{color:var(--danger);font-weight:700;font-size:.95rem}.hidden-section{display:none}.active-section{display:block}@keyframes rise{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.home-hero{text-align:left}.home-eyebrow{font-family:var(--font-mono);font-size:.66rem;font-weight:700;letter-spacing:.24em;text-transform:uppercase;color:var(--accent);margin-bottom:.9rem}.home-hero h2{font-family:var(--font-display);font-weight:900;font-size:clamp(1.7rem,6vw,2.4rem);line-height:1.22;letter-spacing:.01em;margin-bottom:.85rem}.home-hero .accent{color:var(--accent)}.home-lead{color:var(--muted);font-size:.98rem;max-width:42ch;margin-bottom:1.8rem}.home-list{list-style:none;border-top:1px solid var(--line)}.home-list li{display:flex;align-items:center;gap:.9rem;padding:.95rem .2rem;border-bottom:1px solid var(--line);font-weight:700;font-size:.96rem;color:var(--ink)}.home-list .tag{font-family:var(--font-mono);font-size:.62rem;font-weight:700;color:var(--ink);background:var(--paper);border:1px solid var(--line-strong);min-width:40px;height:28px;padding:0 .45rem;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;flex-shrink:0}.home-list .li-sub{margin-left:auto;font-weight:400;font-size:.82rem;color:var(--muted)}.home-hint{margin-top:1.6rem;font-size:.85rem;color:var(--muted)}.home-hint span{font-family:var(--font-mono);color:var(--ink);padding:0 .15em}@media(min-width:768px){.primary-btn{width:auto;min-width:200px}.card{padding:2.6rem 2.6rem 2.7rem}.header-container{padding:1.05rem 1.5rem}h1{font-size:1.3rem}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.001ms!important;transition-duration:.001ms!important}}