:root {
  --ink: #15201e;
  --muted: #69736f;
  --paper: #f6f5f2;
  --paper-deep: #e9e6dc;
  --white: #fbfaf6;
  --blue: #3157df;
  --blue-dark: #1937a5;
  --lime: #c8f45a;
  --line: rgba(21, 32, 30, 0.14);
  --shadow: 0 24px 80px rgba(32, 42, 39, 0.11);
  --radius: 22px;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, Baskerville, "Times New Roman", serif;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.ui-icon { display: inline-block; width: 1em; height: 1em; flex: 0 0 auto; background: currentColor; mask-position: center; mask-repeat: no-repeat; mask-size: contain; }
.icon-search { mask-image: url("/icons/search.svg"); }
.icon-arrow-right { mask-image: url("/icons/arrow-right.svg"); }
.icon-arrow-left { mask-image: url("/icons/arrow-left.svg"); }
.icon-download { mask-image: url("/icons/download.svg"); }
.icon-external { mask-image: url("/icons/external-link.svg"); }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 100;
  background: var(--ink);
  color: white;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  white-space: nowrap;
  transform: translateY(-220%);
}
.skip-link:focus { transform: translateY(0); }

.site-header, .site-footer, #app { width: min(1220px, calc(100% - 48px)); margin-inline: auto; }
.site-header {
  height: 96px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 13px; text-decoration: none; }
.brand-logo { position: relative; display: block; width: 260px; height: 27px; overflow: hidden; }
.brand-logo img { position: absolute; width: 365px; max-width: none; height: auto; left: -98px; top: -75px; }
nav { display: flex; align-items: center; gap: 10px; }
.nav-link { display: inline-flex; align-items: center; gap: 5px; text-decoration: none; font-size: .86rem; padding: .65rem .85rem; border-radius: 999px; }
.nav-link .ui-icon { width: 14px; height: 14px; }
.nav-link:hover { background: rgba(21,32,30,.06); }
.nav-admin { border: 1px solid var(--line); }

#app { min-height: calc(100vh - 190px); }
.loading-screen { min-height: 65vh; display: grid; place-content: center; justify-items: center; color: var(--muted); }
.loader { width: 35px; height: 35px; border: 2px solid var(--line); border-top-color: var(--blue); border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.hero { padding: 82px 0 42px; display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(300px, .65fr); gap: 56px; }
.eyebrow { display: inline-flex; flex-wrap: wrap; max-width: 100%; align-items: center; gap: .55rem; color: var(--blue); font-weight: 750; font-size: .75rem; letter-spacing: .14em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 28px; height: 2px; background: currentColor; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 {
  margin: 22px 0 25px;
  max-width: 870px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(3.4rem, 7.4vw, 7.1rem);
  line-height: .88;
  letter-spacing: -.055em;
}
.hero h1 em { color: var(--blue); font-weight: 400; }
.hero-copy { max-width: 610px; color: var(--muted); font-size: 1.03rem; line-height: 1.75; }
.hero-side { align-self: end; padding-bottom: 10px; }
.issue-label { font-size: .68rem; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); }
.issue-number { font-family: var(--serif); font-size: 6rem; line-height: .85; margin: 12px 0; color: var(--ink); }
.issue-note { color: var(--muted); font-size: .8rem; line-height: 1.6; border-top: 1px solid var(--line); padding-top: 14px; }

.archive-panel { background: var(--white); border: 1px solid rgba(21,32,30,.09); border-radius: 30px; box-shadow: var(--shadow); overflow: hidden; margin-bottom: 80px; }
.archive-toolbar { padding: 23px 26px; display: grid; grid-template-columns: 1fr auto auto; gap: 12px; align-items: center; border-bottom: 1px solid var(--line); }
.search-wrap { position: relative; }
.search-wrap > .ui-icon { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; color: var(--muted); }
.search-wrap input, .archive-toolbar select {
  width: 100%; border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 13px; padding: .82rem 1rem; outline: none;
}
.search-wrap input { padding-left: 44px; }
.search-wrap input:focus, .archive-toolbar select:focus, input:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(49,87,223,.12); }
.archive-toolbar select { min-width: 125px; }
.result-count { color: var(--muted); font-size: .8rem; white-space: nowrap; }
.paper-list { padding: 0 26px; }
.paper-card { display: grid; grid-template-columns: 82px minmax(0, 1fr) auto; gap: 26px; align-items: start; padding: 31px 0; border-bottom: 1px solid var(--line); }
.paper-card:last-child { border-bottom: 0; }
.paper-index { padding-top: 4px; font-family: var(--serif); font-size: 1.2rem; color: var(--muted); }
.paper-meta { display: flex; flex-wrap: wrap; gap: 9px; color: var(--blue); font-weight: 700; font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.paper-card h2 { margin: 10px 0 7px; font-family: var(--serif); font-size: clamp(1.45rem, 2.5vw, 2.15rem); font-weight: 500; line-height: 1.15; letter-spacing: -.02em; }
.paper-card h2 a { text-decoration: none; background-image: linear-gradient(var(--blue), var(--blue)); background-repeat: no-repeat; background-position: 0 100%; background-size: 0 2px; transition: background-size .25s ease; }
.paper-card h2 a:hover { background-size: 100% 2px; }
.paper-authors { color: var(--muted); font-size: .86rem; }
.paper-abstract { max-width: 760px; margin: 14px 0 0; color: var(--muted); line-height: 1.65; font-size: .89rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.paper-actions { display: flex; gap: 8px; padding-top: 3px; }
.icon-button { width: 41px; height: 41px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line); background: transparent; text-decoration: none; cursor: pointer; transition: .2s ease; }
.icon-button:hover { background: var(--ink); color: white; transform: translateY(-2px); }
.icon-button .ui-icon { width: 17px; height: 17px; }
.empty-state { padding: 80px 20px; text-align: center; color: var(--muted); }

.detail-shell { padding: 58px 0 80px; }
.back-link { display: inline-flex; align-items: center; gap: 8px; color: var(--muted); text-decoration: none; font-size: .83rem; margin-bottom: 54px; }
.back-link .ui-icon { width: 16px; height: 16px; }
.back-link:hover { color: var(--blue); }
.detail-grid { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 70px; }
.detail-grid > * { min-width: 0; }
.detail-main h1 { font-family: var(--serif); font-size: clamp(2.8rem, 5.4vw, 5.4rem); line-height: .98; letter-spacing: -.045em; font-weight: 500; margin: 21px 0 24px; }
.detail-main h1, .title-en, .abstract-block p { overflow-wrap: anywhere; }
.title-en { max-width: 820px; color: var(--muted); font-size: 1.04rem; line-height: 1.6; }
.author-row { display: flex; flex-wrap: wrap; gap: 9px; margin: 30px 0 52px; }
.author-chip { background: var(--white); border: 1px solid var(--line); border-radius: 999px; padding: .53rem .8rem; font-size: .76rem; }
.abstract-block { border-top: 1px solid var(--line); padding-top: 31px; }
.abstract-block h2 { font-size: .7rem; letter-spacing: .15em; text-transform: uppercase; color: var(--blue); }
.abstract-block p { font-family: var(--serif); font-size: 1.27rem; line-height: 1.78; }
.keywords { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 30px; }
.keyword { font-size: .72rem; color: var(--muted); background: var(--paper-deep); padding: .45rem .65rem; border-radius: 6px; }
.download-card { position: sticky; top: 28px; background: var(--ink); color: white; padding: 28px; border-radius: var(--radius); overflow: hidden; }
.download-card .label { color: var(--lime); font-size: .68rem; letter-spacing: .14em; text-transform: uppercase; }
.download-card h3 { font-family: var(--serif); font-size: 2rem; font-weight: 500; margin: 18px 0 28px; }
.file-facts { display: grid; gap: 12px; margin: 0 0 26px; }
.file-facts div { display: flex; justify-content: space-between; gap: 12px; min-width: 0; padding-bottom: 11px; border-bottom: 1px solid rgba(255,255,255,.15); font-size: .74rem; }
.file-facts dt { color: rgba(255,255,255,.55); }
.file-facts dd { min-width: 0; margin: 0; text-align: right; overflow-wrap: anywhere; }
.fact-link { color: white; text-decoration-color: rgba(255,255,255,.38); text-underline-offset: 3px; }
.fact-link:hover { color: var(--lime); }
.primary-button, .secondary-button, .danger-button {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 0; border-radius: 12px; padding: .85rem 1.05rem; font-weight: 750; font-size: .8rem; cursor: pointer; text-decoration: none; transition: .2s ease;
}
.primary-button { background: var(--lime); color: var(--ink); }
.primary-button .ui-icon { width: 18px; height: 18px; }
.primary-button:hover { background: white; transform: translateY(-2px); }
.primary-button.full { width: 100%; }
.primary-button:disabled { opacity: .55; cursor: wait; transform: none; }
.publisher-link { display: flex; align-items: center; justify-content: center; gap: 7px; margin-top: 14px; color: white; font-size: .76rem; font-weight: 700; text-underline-offset: 4px; }
.publisher-link .ui-icon { width: 14px; height: 14px; }
.archive-note { margin: 19px 0 0; color: rgba(255,255,255,.58); font-size: .67rem; line-height: 1.55; }
.secondary-button { color: var(--ink); background: var(--paper-deep); border: 1px solid var(--line); }
.secondary-button:hover { background: white; }
.danger-button { background: #ffe7e5; color: #9d2a22; }

.admin-page { padding: 58px 0 90px; }
.admin-hero { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 34px; }
.admin-hero h1 { font-family: var(--serif); font-size: clamp(2.7rem, 5vw, 5.2rem); font-weight: 500; line-height: 1; letter-spacing: -.04em; margin: 15px 0 0; }
.admin-grid { display: grid; grid-template-columns: minmax(0, .82fr) minmax(480px, 1.18fr); gap: 24px; align-items: start; }
.panel { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; box-shadow: 0 12px 40px rgba(32,42,39,.06); }
.panel-head { display: flex; justify-content: space-between; gap: 20px; align-items: center; margin-bottom: 23px; }
.panel h2 { font-family: var(--serif); font-size: 1.7rem; font-weight: 500; margin: 0; }
.admin-list { display: grid; gap: 10px; }
.admin-item { display: grid; grid-template-columns: 1fr auto; gap: 18px; padding: 17px; border: 1px solid var(--line); border-radius: 14px; }
.admin-item.is-draft { border-color: rgba(49,87,223,.38); background: rgba(49,87,223,.035); }
.admin-item h3 { font-size: .93rem; margin: 0 0 7px; }
.admin-item p { color: var(--muted); font-size: .73rem; margin: 0; }
.admin-item-actions { display: flex; gap: 6px; }
.mini-button { border: 1px solid var(--line); background: var(--paper); color: var(--ink); border-radius: 9px; padding: .45rem .65rem; cursor: pointer; font-size: .7rem; }
.mini-button:hover { border-color: var(--blue); color: var(--blue); }
.mini-button:disabled { opacity: .38; cursor: not-allowed; border-color: var(--line); color: var(--muted); }
.mini-button.delete:hover { border-color: #b43a31; color: #b43a31; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.form-field { display: grid; gap: 7px; }
.form-grid > .full { grid-column: 1 / -1; }
.form-field > span, .author-field legend { color: var(--muted); font-size: .73rem; font-weight: 650; }
.form-field input, .form-field textarea { width: 100%; border: 1px solid var(--line); background: var(--paper); border-radius: 11px; padding: .78rem .85rem; color: var(--ink); outline: 0; }
.form-field textarea { min-height: 128px; resize: vertical; line-height: 1.55; }
.form-field small, .field-help { color: var(--muted); font-size: .68rem; line-height: 1.5; }
.form-section-heading { display: flex; align-items: center; gap: 12px; margin: 9px 0 1px; padding-top: 18px; border-top: 1px solid var(--line); }
.form-section-heading:first-child { padding-top: 0; border-top: 0; }
.form-section-heading > span { display: grid; place-items: center; flex: 0 0 28px; width: 28px; height: 28px; border-radius: 50%; background: var(--ink); color: white; font-size: .72rem; font-weight: 750; }
.form-section-heading h3 { margin: 0 0 2px; font-size: .86rem; }
.form-section-heading p { margin: 0; color: var(--muted); font-size: .68rem; line-height: 1.45; }
.author-field { min-width: 0; margin: 0; padding: 0; border: 0; }
.author-field legend { padding: 0; margin-bottom: 5px; }
.field-help { margin: 0 0 9px; }
.author-list { display: grid; gap: 8px; }
.author-item { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 8px; align-items: center; padding: 9px; border: 1px solid var(--line); border-radius: 12px; background: var(--paper); }
.author-position { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--white); border: 1px solid var(--line); color: var(--blue); font-family: var(--serif); font-size: .88rem; }
.author-item > input { min-width: 0; width: 100%; border: 0; border-bottom: 1px solid transparent; background: transparent; padding: .62rem .2rem; outline: 0; }
.author-item > input:focus { border-bottom-color: var(--blue); box-shadow: none; }
.author-controls { grid-column: 2; display: flex; flex-wrap: wrap; gap: 5px; }
.author-action { padding: .36rem .52rem; }
.add-author { margin-top: 9px; }
.file-drop { position: relative; display: grid; justify-items: center; gap: 7px; min-height: 146px; align-content: center; border: 1px dashed rgba(49,87,223,.5); background: rgba(49,87,223,.04); border-radius: 14px; padding: 20px; text-align: center; cursor: pointer; transition: .2s ease; }
.file-drop:hover, .file-drop:focus-within, .file-drop.is-dragging { border-color: var(--blue); background: rgba(49,87,223,.09); box-shadow: 0 0 0 3px rgba(49,87,223,.1); }
.file-drop.has-file { border-style: solid; border-color: rgba(61,139,75,.55); background: rgba(61,139,75,.06); }
.file-drop strong { font-size: .86rem; }
.file-drop > span:not(.file-summary) { color: var(--muted); font-size: .69rem; }
.file-input { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; pointer-events: none; }
.file-summary { max-width: 100%; color: var(--blue); font-size: .72rem; font-weight: 700; overflow-wrap: anywhere; }
.file-tools { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 8px; }
.file-tools a { text-decoration: none; }
.checkbox-field { display: flex; align-items: center; gap: 9px; font-size: .76rem; }
.form-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin-top: 20px; }
.form-status, .form-error { flex-basis: 100%; min-height: 1.2em; font-size: .76rem; }
.form-status { color: var(--blue-dark); }
.login-shell { min-height: 68vh; display: grid; place-items: center; }
.login-card { width: min(430px, 100%); }
.login-card .brand-logo { margin-bottom: 24px; }
.login-card h1 { font-family: var(--serif); font-size: 2.6rem; font-weight: 500; margin-bottom: 10px; }
.login-card > p { color: var(--muted); line-height: 1.6; margin-bottom: 27px; }
.login-form { display: grid; gap: 13px; }
.login-form input { border: 1px solid var(--line); background: var(--paper); border-radius: 12px; padding: .9rem 1rem; outline: 0; }
.form-error { color: #a8322a; }

.site-footer { border-top: 1px solid var(--line); min-height: 94px; display: flex; align-items: center; justify-content: space-between; gap: 20px; color: var(--muted); font-size: .72rem; }
.footer-status { display: flex; align-items: center; gap: 8px; }
.footer-status i { width: 7px; height: 7px; background: #58a846; border-radius: 50%; box-shadow: 0 0 0 4px rgba(88,168,70,.12); }
.toast-region { position: fixed; z-index: 50; right: 22px; bottom: 22px; display: grid; gap: 9px; }
.toast { background: var(--ink); color: white; padding: .8rem 1rem; border-radius: 11px; box-shadow: var(--shadow); font-size: .78rem; animation: toast-in .25s ease; }
@keyframes toast-in { from { transform: translateY(8px); opacity: 0; } }

@media (max-width: 900px) {
  .hero, .detail-grid, .admin-grid { grid-template-columns: 1fr; }
  .hero { gap: 18px; }
  .hero-side { display: none; }
  .download-card { position: relative; }
  .detail-grid { gap: 38px; }
  .admin-grid > .panel:last-child { order: -1; }
}
@media (max-width: 640px) {
  .site-header, .site-footer, #app { width: min(100% - 28px, 1220px); }
  .site-header { height: 78px; }
  .brand-logo { width: 184px; height: 22px; }
  .brand-logo img { width: 258px; left: -69px; top: -54px; }
  .nav-link:first-child { display: none; }
  .nav-group { display: none; }
  .hero { padding-top: 54px; }
  .hero h1 { font-size: 3.5rem; }
  .archive-toolbar { grid-template-columns: 1fr; padding: 17px; }
  .result-count { display: none; }
  .paper-list { padding: 0 17px; }
  .paper-card { grid-template-columns: 1fr; gap: 14px; padding: 25px 0; }
  .paper-index { display: none; }
  .paper-actions { grid-column: 1; grid-row: auto; padding-top: 0; }
  .detail-shell, .admin-page { padding-top: 38px; }
  .back-link { margin-bottom: 36px; }
  .detail-main h1 { font-size: 3.05rem; }
  .abstract-block p { font-size: 1.08rem; }
  .admin-hero { display: block; }
  .admin-hero .secondary-button { margin-top: 22px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-grid > .full { grid-column: auto; }
  .author-item { grid-template-columns: 28px minmax(0, 1fr); }
  .author-controls { grid-column: 1 / -1; }
  .author-action { flex: 1 1 auto; min-height: 44px; }
  .site-footer { align-items: flex-start; flex-direction: column; justify-content: center; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}