:root { --ink:#18251e; --paper:#fff; --green:#1e4d39; --sage:#eef2ed; --line:#dedede; }
* { box-sizing:border-box; }
html { scroll-behavior:smooth; }
body { margin:0; background:#fff; color:var(--ink); font-family:"Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", Arial, sans-serif; }
button,input { font:inherit; }
button,a { -webkit-tap-highlight-color:transparent; }
.topbar { height:82px; padding:0 5vw; display:flex; align-items:center; justify-content:space-between; border-bottom:1px solid rgba(24,37,30,.12); position:relative; z-index:2; }
.brand { color:var(--ink); display:flex; align-items:center; gap:12px; text-decoration:none; font-size:23px; font-weight:700; letter-spacing:.02em; }
.brand-mark { width:28px; height:25px; display:flex; align-items:flex-end; gap:3px; }
.brand-mark i { display:block; width:6px; background:var(--green); border-radius:1px; transform:rotate(-5deg); }
.brand-mark i:nth-child(1){height:21px}.brand-mark i:nth-child(2){height:25px;transform:rotate(3deg)}.brand-mark i:nth-child(3){height:18px;transform:rotate(8deg)}
nav { display:flex; height:100%; align-items:center; gap:38px; }
nav a { color:#667069; text-decoration:none; font-size:13px; font-weight:700; letter-spacing:.08em; height:100%; display:grid; place-items:center; position:relative; }
nav a.active { color:var(--green); } nav a.active:after { content:""; position:absolute; height:2px; left:0; right:0; bottom:0; background:var(--green); }
.register-button { border:0;border-radius:3px;background:var(--green);color:#fff;padding:12px 18px;font-size:12px;font-weight:800;cursor:pointer; }
.header-actions{display:flex;align-items:center;gap:9px}.admin-link{border:1px solid var(--line);border-radius:3px;color:var(--ink);padding:11px 14px;text-decoration:none;font-size:12px;font-weight:800;background:#fff}
.hero { min-height:410px; padding:78px 9vw 60px; position:relative; overflow:hidden; border-bottom:1px solid var(--line); background:#fff; }
.hero:after { content:"本棚"; position:absolute; right:2vw; bottom:-45px; font-size:160px;line-height:1;font-weight:700;color:rgba(30,77,57,.035);letter-spacing:-12px; }
.eyebrow,.kicker { color:#806a4a; font-size:10px; font-weight:800; letter-spacing:.24em; margin:0 0 20px; }
.eyebrow span { display:inline-block;width:28px;height:1px;background:#806a4a;vertical-align:middle;margin-right:12px; }
.hero h1 { font-size:clamp(42px,5vw,72px); line-height:1.15; margin:0; letter-spacing:-.05em; font-weight:700; }
.hero h1 em { color:var(--green); font-style:normal; position:relative; }
.hero h1 em:after { content:"";position:absolute;left:0;right:0;bottom:-9px;height:7px;background:repeating-linear-gradient(90deg,#b77c4c 0 3px,transparent 3px 7px);opacity:.65; }
.hero>p { color:#687068; margin:28px 0 0; font-size:16px; }
.stats { position:absolute; right:9vw; bottom:52px; display:flex; gap:50px; z-index:1; }
.stats div { display:flex; align-items:baseline; gap:9px; }.stats strong{font-size:42px;line-height:1;font-weight:700;color:var(--green)}.stats span{font-size:11px;color:#6c746e}
.library { padding:74px 5vw 100px; max-width:1440px; margin:auto; }
.section-heading { display:flex; align-items:flex-end; justify-content:space-between; gap:30px; margin-bottom:38px; }
.section-heading h2,.guide h2 { font-size:34px;line-height:1.2;font-weight:700; margin:0; letter-spacing:-.03em; }
.section-heading .kicker,.guide .kicker { margin-bottom:12px; }
.search { background:#fff; border:1px solid var(--line); width:min(340px,100%); display:flex; align-items:center; gap:10px; padding:12px 16px; border-radius:2px; }
.search span { font-size:24px;transform:rotate(-15deg);color:#687068 }.search input { width:100%;border:0;outline:0;background:transparent;font-size:13px;color:var(--ink) }
.filters { display:flex;justify-content:space-between;align-items:center;gap:20px;padding-bottom:28px;border-bottom:1px solid var(--line);margin-bottom:38px; }
.category-tabs,.availability { display:flex;gap:8px;flex-wrap:wrap; }.filters button { border:0;background:transparent;padding:9px 15px;color:#777e79;font-size:12px;cursor:pointer;border-radius:30px;font-weight:700 }.category-tabs button.selected { background:var(--green);color:white }.availability { border-left:1px solid var(--line);padding-left:20px}.availability button { border-radius:2px;padding:8px 11px}.availability button.selected{background:#e0ded5;color:var(--ink)}
.book-grid { display:grid;grid-template-columns:repeat(4,1fr);gap:52px 28px; }
.book-card { min-width:0; animation:rise .55s both; animation-delay:var(--delay); }
@keyframes rise { from {opacity:0;transform:translateY(14px)} }
.cover-button { width:100%;position:relative;border:0;padding:0;background:transparent;text-align:left;cursor:pointer;perspective:800px; }
.cover { aspect-ratio:3/4.15;padding:26px 23px 21px;display:flex;flex-direction:column;position:relative;overflow:hidden;box-shadow:0 13px 24px rgba(40,35,25,.13),inset 5px 0 0 rgba(0,0,0,.08);transition:.25s transform,.25s box-shadow;color:#f8f3e7; }
.cover-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:3}.cover:has(.cover-image) .cover-top,.cover:has(.cover-image) .cover-title,.cover:has(.cover-image) .cover-author{visibility:hidden}
.cover-button:hover .cover { transform:translateY(-7px) rotateY(-2deg);box-shadow:0 20px 32px rgba(40,35,25,.2),inset 5px 0 0 rgba(0,0,0,.08) }
.cover:after { content:"";position:absolute;width:170px;height:170px;border:1px solid currentColor;border-radius:50%;opacity:.14;right:-58px;bottom:-45px;box-shadow:0 0 0 24px transparent,0 0 0 25px currentColor,0 0 0 50px transparent,0 0 0 51px currentColor; }
.cover-green{background:#194c3d}.cover-rust{background:#a84e38}.cover-navy{background:#23394b}.cover-cream{background:#ddd2b8;color:#283b32}.cover-purple{background:#675074}.cover-blue{background:#2a6480}.cover-moss{background:#66744d}.cover-charcoal{background:#343835}
.cover-top{display:flex;justify-content:space-between;align-items:center;font-size:9px;letter-spacing:.12em;border-bottom:1px solid currentColor;padding-bottom:12px;opacity:.9}.cover-top b{font-size:25px;line-height:1;font-weight:700}.cover-title{font-size:clamp(19px,2.1vw,30px);line-height:1.25;font-weight:700;max-width:90%;margin:auto 0 0;position:relative;z-index:1}.cover-author{font-size:10px;letter-spacing:.08em;margin-top:18px;position:relative;z-index:1}
.loan-badge { position:absolute;top:15px;right:-7px;background:#e5a84a;color:#38260f;font-size:11px;font-weight:800;padding:8px 12px;box-shadow:0 4px 10px rgba(0,0,0,.12);z-index:2}.loan-badge:after{content:"";position:absolute;right:0;bottom:-6px;border-top:6px solid #8d5e24;border-right:7px solid transparent}
.book-meta { padding:18px 3px 0; }.book-meta .category{color:#8a7962;font-size:9px;font-weight:800;letter-spacing:.14em}.book-meta h3{font-size:18px;line-height:1.4;font-weight:700;margin:7px 0 5px}.book-meta p{font-size:11px;color:#777e79;margin:0 0 15px}.book-meta button{width:100%;border:0;border-top:1px solid var(--line);background:transparent;color:var(--green);font-size:11px;font-weight:800;display:flex;justify-content:space-between;padding:12px 0 0;cursor:pointer}.book-meta button.secondary{color:#9a7135}.book-meta button span{font-size:16px}
.loading,.empty{padding:70px;text-align:center;color:#7a817c;background:#efebe2;border:1px solid var(--line)}
.guide { background:#fff;color:var(--ink);padding:68px 9vw;display:flex;align-items:center;justify-content:space-between;gap:50px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.guide .kicker{color:#806a4a}.guide ol{list-style:none;margin:0;padding:0;display:flex;gap:48px}.guide li{display:flex;gap:14px;align-items:flex-start}.guide li>b{font-size:25px;font-weight:700;color:var(--green)}.guide li span{font-size:11px;color:#687068;line-height:1.7}.guide li strong{display:block;color:var(--ink);font-size:13px}
footer{padding:24px 5vw;display:flex;justify-content:space-between;font-size:11px;color:#777e79}
.empty-shelf{grid-column:1/-1;min-height:280px;border:1px solid var(--line);background:#fff;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:12px;text-align:center;color:#687068}.empty-shelf strong{font-size:18px;color:var(--ink)}.empty-shelf span{font-size:12px}.empty-shelf button{margin-top:10px;border:0;border-radius:3px;background:var(--green);color:#fff;padding:13px 22px;font-size:12px;font-weight:800;cursor:pointer}
.modal-backdrop[hidden]{display:none}
.modal-backdrop{position:fixed;inset:0;background:rgba(16,28,22,.7);z-index:10;display:grid;place-items:center;padding:20px;backdrop-filter:blur(4px)}
.modal{background:#f8f4eb;width:min(690px,100%);display:grid;grid-template-columns:230px 1fr;position:relative;box-shadow:0 30px 80px rgba(0,0,0,.3);animation:pop .2s ease-out}@keyframes pop{from{opacity:0;transform:scale(.97)}}
.close{position:absolute;right:15px;top:12px;border:0;background:transparent;font-size:27px;color:#687068;cursor:pointer}.mini-cover{margin:30px;min-height:310px;padding:25px;display:flex;flex-direction:column;justify-content:space-between;color:#fff;box-shadow:8px 10px 20px rgba(0,0,0,.15);overflow:hidden}.mini-cover:has(img){padding:0}.mini-cover img{display:block;width:100%;height:100%;min-height:310px;object-fit:cover}.mini-cover b{font-size:35px;font-weight:700}.mini-cover span{font-size:25px;line-height:1.3;font-weight:700}.modal-content{padding:54px 42px 40px 14px}.modal-content h2{font-size:28px;line-height:1.35;font-weight:700;margin:0 0 8px}.modal-author{color:#777e79;font-size:13px;margin:0 0 30px}.name-field{display:block;font-size:11px;font-weight:800;margin-top:30px}.name-field input{display:block;width:100%;margin-top:8px;padding:13px;border:1px solid var(--line);background:white;outline-color:var(--green)}.modal-action{width:100%;margin-top:16px;border:0;background:var(--green);color:#fff;padding:14px;font-weight:800;font-size:12px;cursor:pointer}.modal-action:disabled{opacity:.45;cursor:not-allowed}.loan-info{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:18px 0;display:flex;gap:18px;align-items:center}.loan-info>span{background:#e5a84a;color:#38260f;padding:7px 9px;font-size:10px;font-weight:800}.loan-info p{font-size:12px;line-height:1.7;margin:0}
/* 蔵書登録 */
.register-modal{background:#fff;width:min(680px,100%);padding:42px;position:relative;box-shadow:0 30px 80px rgba(0,0,0,.3);animation:pop .2s ease-out}.register-heading h2{font-size:28px;margin:0 0 8px}.register-heading>p:last-child{font-size:13px;color:#687068;margin:0 0 28px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.form-grid label{font-size:11px;font-weight:800}.form-grid label>span{color:#a84e38;margin-left:5px}.form-grid input,.form-grid select{display:block;width:100%;margin-top:8px;padding:13px;border:1px solid var(--line);background:#fff;color:var(--ink);outline-color:var(--green)}.form-wide{grid-column:1/-1}.form-wide small{display:block;color:#777e79;font-weight:400;margin-top:7px}.form-error{color:#a33b2d;background:#fff1ee;padding:10px;font-size:12px;margin:14px 0 0}
@media(max-width:900px){.book-grid{grid-template-columns:repeat(3,1fr)}.stats{position:static;margin-top:55px}.guide{align-items:flex-start;flex-direction:column}.guide ol{width:100%;justify-content:space-between}.hero{padding-left:6vw}.library{padding-left:6vw;padding-right:6vw}}
@media(max-width:650px){.topbar{height:68px;padding:0 4vw}.topbar nav{display:none}.admin-link{padding:9px 10px}.register-button{padding:10px 12px}.hero{padding-top:55px;min-height:auto}.hero:after{font-size:100px}.hero h1{font-size:42px}.stats{gap:28px}.stats strong{font-size:34px}.section-heading{align-items:flex-start;flex-direction:column}.search{width:100%}.filters{align-items:flex-start;flex-direction:column}.availability{border-left:0;padding-left:0}.book-grid{grid-template-columns:repeat(2,1fr);gap:38px 16px}.cover{padding:18px 16px;background-size:cover;background-position:center}.cover-title{font-size:19px}.guide ol{flex-direction:column;gap:20px}.modal{grid-template-columns:1fr;max-height:90vh;overflow:auto}.mini-cover{min-height:180px;margin:24px 55px 0}.modal-content{padding:28px}.close{color:white;z-index:2}.register-modal{padding:30px 22px;max-height:90vh;overflow:auto}.register-modal .close{color:#687068}.form-grid{grid-template-columns:1fr}.form-wide{grid-column:auto}footer{flex-direction:column;gap:8px}}