:root{--bg: #efede6;--surface: #ffffff;--ink: #20232b;--ink-soft: #5c5f6b;--ink-faint: #8b8d95;--line: #dad5c7;--line-strong: #c7c1ae;--accent: #b23a2e;--accent-dark: #922e24;--accent-soft: #f2e3e0;--focus: #2f6f9e;--font-head: "Source Serif 4", Georgia, serif;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{background:var(--bg);color:var(--ink);font-family:var(--font-body);-webkit-font-smoothing:antialiased}#root{min-height:100vh;display:flex;flex-direction:column}a{color:inherit}button{font-family:inherit}:focus-visible{outline:2px solid var(--focus);outline-offset:2px}@media (prefers-reduced-motion: reduce){*{animation-duration:.001ms!important;transition-duration:.001ms!important}}.page{flex:1;display:flex;flex-direction:column}.container{width:100%;max-width:1120px;margin:0 auto;padding:0 24px}.navbar{background:var(--surface);border-bottom:1px solid var(--line)}.navbar-inner{display:flex;align-items:center;gap:32px;padding:18px 24px}.brand{display:flex;align-items:baseline;gap:8px;text-decoration:none;flex-shrink:0}.brand-mark{width:30px;height:30px;border-radius:7px;background:var(--ink);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-head);font-weight:600;font-size:16px;flex-shrink:0}.brand-name{font-family:var(--font-head);font-weight:600;font-size:19px;color:var(--ink);letter-spacing:.01em}.brand-name em{font-style:normal;color:var(--accent)}.navbar-search{flex:1;max-width:480px;margin-left:auto}.search-field{position:relative;display:flex;align-items:center}.search-field svg{position:absolute;left:14px;color:var(--ink-faint);pointer-events:none}.search-field input{width:100%;padding:10px 14px 10px 40px;border-radius:8px;border:1px solid var(--line-strong);background:var(--bg);color:var(--ink);font-size:14.5px;transition:border-color .12s ease,background .12s ease}.search-field input::placeholder{color:var(--ink-faint)}.search-field input:focus{background:var(--surface);border-color:var(--focus)}.intro{padding:44px 0 28px}.intro h1{font-family:var(--font-head);font-weight:600;font-size:clamp(28px,4vw,38px);margin:0 0 10px;max-width:30ch}.intro p{margin:0;color:var(--ink-soft);font-size:15.5px;max-width:56ch;line-height:1.55}.result-count{margin:28px 0 16px;font-size:13.5px;color:var(--ink-faint);border-top:1px solid var(--line);padding-top:16px}.paper-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding-bottom:56px}@media (max-width: 900px){.paper-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 600px){.paper-grid{grid-template-columns:1fr}.navbar-inner{flex-wrap:wrap;gap:12px}.navbar-search{max-width:none;width:100%;order:3;margin-left:0}}.paper-card{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:20px;display:flex;flex-direction:column;gap:12px}.paper-tag{align-self:flex-start;background:var(--accent-soft);color:var(--accent-dark);font-size:12.5px;font-weight:500;padding:3px 10px;border-radius:5px}.paper-title{font-family:var(--font-head);font-size:18px;font-weight:600;line-height:1.35;margin:0}.paper-meta{display:flex;gap:14px;font-size:13.5px;color:var(--ink-soft);padding-top:10px;border-top:1px solid var(--line)}.paper-meta span strong{color:var(--ink);font-weight:500}.paper-actions{display:flex;gap:10px;margin-top:4px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:14px;font-weight:500;padding:9px 16px;border-radius:999px;border:1px solid transparent;cursor:pointer;text-decoration:none;transition:background .12s ease,border-color .12s ease,color .12s ease}.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--ink);flex:1}.btn-outline:hover{border-color:var(--ink)}.btn-solid{background:var(--ink);color:#fff;flex:1}.btn-solid:hover{background:var(--accent-dark)}.btn-ghost{background:transparent;color:var(--ink-soft);padding-left:4px;padding-right:4px}.btn-ghost:hover{color:var(--ink)}.empty-state{padding:64px 0;text-align:center;color:var(--ink-soft)}.empty-state h2{font-family:var(--font-head);font-size:20px;color:var(--ink);margin:0 0 8px}.viewer-page{flex:1;display:flex;flex-direction:column;background:var(--bg)}.viewer-header{background:var(--surface);border-bottom:1px solid var(--line);padding:16px 24px}.viewer-header-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.viewer-title-block h1{font-family:var(--font-head);font-size:20px;font-weight:600;margin:10px 0 4px}.viewer-meta{font-size:13.5px;color:var(--ink-soft);display:flex;gap:14px;flex-wrap:wrap}.viewer-frame-wrap{flex:1;padding:20px 24px 24px;display:flex}.viewer-frame-wrap iframe{flex:1;width:100%;border:1px solid var(--line);border-radius:8px;background:#fff;min-height:60vh}.viewer-fallback{margin:0 24px 24px;padding:16px 18px;border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink-soft);font-size:14px}.viewer-fallback a{color:var(--accent);font-weight:500}