/* 文利资源库 — 静态站点样式 */

:root {
  --bg: #f4efe6;
  --bg-deep: #ebe3d4;
  --paper: #fffdf8;
  --ink: #2a241c;
  --ink-soft: #5a5349;
  --muted: #7a7268;
  --line: #d8cebf;
  --line-strong: #c4b8a4;
  --accent: #7a3d2e;
  --accent-hover: #5e2d22;
  --accent-soft: #f3e6df;
  --forest: #3d5348;
  --gold: #a78445;
  --gold-soft: #e8d9b8;
  --pending-bg: #f7edd6;
  --pending-ink: #6b5420;
  --shadow: 0 1px 2px rgba(42, 36, 28, 0.04), 0 8px 24px rgba(42, 36, 28, 0.06);
  --radius: 12px;
  --header-h: 4.25rem;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", "Source Han Serif SC", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --measure: 42rem;
  --wrap: 68rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.8;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--accent-hover);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
label:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  background: var(--ink);
  color: var(--paper);
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
}

.skip-link:focus {
  top: 0.6rem;
}

.wrap {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
}

/* Header */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(244, 239, 230, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  flex-shrink: 0;
}

.logo:hover {
  color: var(--ink);
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border: 1px solid var(--gold);
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.logo-name {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.logo-tag {
  margin-top: 0.15rem;
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--muted);
}

#nav-toggle {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 1.5px;
  background: var(--ink);
}

.site-nav ul {
  display: flex;
  gap: 0.15rem 1.35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--ink);
}

.site-nav a.is-current {
  color: var(--ink);
  border-bottom-color: var(--gold);
  font-weight: 500;
}

/* Main */

main {
  flex: 1;
}

.page {
  padding: 3.25rem 0 4.5rem;
}

.page-head {
  max-width: 40rem;
  margin-bottom: 2.75rem;
}

.kicker {
  margin: 0 0 0.6rem;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--gold);
  font-weight: 500;
}

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

h1 {
  margin: 0 0 0.9rem;
  font-size: clamp(1.85rem, 3.4vw, 2.55rem);
  letter-spacing: 0.06em;
}

.lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
}

h2 {
  margin: 2.4rem 0 0.9rem;
  font-size: 1.45rem;
  letter-spacing: 0.06em;
}

h3 {
  margin: 1.4rem 0 0.5rem;
  font-size: 1.12rem;
}

/* Hero */

.hero {
  padding: 4.2rem 0 3.4rem;
  background:
    radial-gradient(1200px 280px at 80% 0%, rgba(167, 132, 69, 0.10), transparent 60%),
    linear-gradient(180deg, #efe6d6 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  width: min(100% - 2.5rem, 44rem);
  margin-inline: auto;
  text-align: center;
}

.hero .kicker {
  margin-bottom: 0.85rem;
}

.hero h1 {
  font-size: clamp(1.9rem, 5vw, 2.85rem);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.hero-rule {
  width: 3.2rem;
  height: 1px;
  margin: 0 auto 1.4rem;
  background: var(--gold);
  border: 0;
}

.hero .lead {
  font-size: 1.12rem;
}

/* Cards */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.15rem;
}

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem 1.35rem 1.3rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  text-decoration: none;
  color: inherit;
}

a.card:hover {
  border-color: var(--gold);
  color: inherit;
}

.card h2,
.card h3 {
  margin: 0;
  font-size: 1.2rem;
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  flex: 1;
}

.card-meta {
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.card-link {
  margin-top: 0.5rem;
  font-size: 0.92rem;
  color: var(--accent);
}

/* Badges / placeholders */

.badge {
  display: inline-block;
  padding: 0.08rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  background: var(--pending-bg);
  color: var(--pending-ink);
  border: 1px solid #e4d3a4;
}

.placeholder-note {
  background: var(--pending-bg);
  border: 1px dashed #c9ae6a;
  border-radius: 8px;
  padding: 0.9rem 1.05rem;
  color: var(--pending-ink);
}

.placeholder-note p {
  margin: 0;
}

/* Sections on home */

.home-section {
  padding: 3rem 0 1rem;
}

.home-section .wrap > .section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.section-head h2 {
  margin: 0;
}

.section-head a {
  font-size: 0.92rem;
  flex-shrink: 0;
}

/* Course page */

.prose {
  max-width: var(--measure);
}

.prose p,
.prose li {
  color: var(--ink);
}

.prose ul,
.prose ol {
  padding-left: 1.3rem;
}

.prose li + li {
  margin-top: 0.25rem;
}

.schedule {
  display: grid;
  gap: 1.1rem;
}

.day {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem 1.15rem;
  box-shadow: var(--shadow);
}

.day-label {
  margin: 0 0 0.2rem;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  font-weight: 500;
}

.day h3 {
  margin: 0 0 0.85rem;
}

.lesson {
  padding: 0.85rem 0;
  border-top: 1px solid var(--line);
}

.lesson:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.lesson h4 {
  margin: 0 0 0.35rem;
  font-size: 1.02rem;
  font-family: var(--font-sans);
  font-weight: 600;
}

.lesson p {
  margin: 0;
  color: var(--ink-soft);
}

.lesson-files {
  margin-top: 0.65rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.file-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--bg);
  color: var(--accent);
  text-decoration: none;
  font-size: 0.88rem;
}

.file-link:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.file-link.pending {
  color: var(--pending-ink);
  background: var(--pending-bg);
  border-style: dashed;
  pointer-events: none;
}

/* Video placeholder */

.video-slot {
  position: relative;
  width: 100%;
  max-width: 42rem;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
  border: 1px dashed #c9ae6a;
  background:
    repeating-linear-gradient(-45deg, #f3ead6, #f3ead6 12px, #efe3c8 12px, #efe3c8 24px);
  display: grid;
  place-items: center;
  color: var(--pending-ink);
  text-align: center;
  padding: 1.5rem;
}

.video-slot strong {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.35rem;
}

.video-slot span {
  font-size: 0.92rem;
}

/* Meta list / assessment */

.meta-list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.meta-list li {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.9rem 1.1rem;
}

.meta-list strong {
  display: block;
  font-family: var(--font-serif);
  margin-bottom: 0.2rem;
}

/* Library */

.library-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  align-items: center;
  margin-bottom: 1.25rem;
}

.library-search {
  flex: 1 1 16rem;
  position: relative;
}

.library-search input {
  width: 100%;
  appearance: none;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  font: inherit;
  color: var(--ink);
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.filter-chips button {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.88rem;
  padding: 0.28rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
}

.filter-chips button.is-active {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.library-table-wrap {
  overflow-x: auto;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

table.library {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.98rem;
}

table.library th,
table.library td {
  text-align: left;
  padding: 0.8rem 1rem;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

table.library th {
  font-weight: 500;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  background: var(--bg-deep);
}

table.library tr:last-child td {
  border-bottom: 0;
}

table.library tr.is-hidden {
  display: none;
}

.empty-state {
  display: none;
  padding: 1.5rem;
  text-align: center;
  color: var(--muted);
}

.empty-state.is-visible {
  display: block;
}

/* Footer */

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line);
  background: var(--bg-deep);
  padding: 2rem 0 2.3rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.footer-inner {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
}

.site-footer p {
  margin: 0 0 0.35rem;
}

.site-footer .muted {
  color: var(--muted);
}

/* Utilities */

.mt-0 { margin-top: 0; }
.narrow { max-width: 42rem; }

/* Responsive */

@media (max-width: 760px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    display: none;
    padding: 0.4rem 0 0.8rem;
  }

  #nav-toggle:checked ~ .site-nav {
    display: block;
  }

  .site-nav ul {
    flex-direction: column;
    width: min(100% - 2.5rem, var(--wrap));
    margin-inline: auto;
    gap: 0;
  }

  .site-nav a {
    display: block;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line);
  }

  .site-nav a.is-current {
    border-bottom-color: var(--line);
  }

  .hero {
    padding: 2.8rem 0 2.3rem;
  }

  .page {
    padding: 2.2rem 0 3.2rem;
  }

  .wrap,
  .header-inner,
  .hero-inner,
  .footer-inner {
    width: min(100% - 1.5rem, var(--wrap));
  }

  table.library th,
  table.library td {
    padding: 0.7rem 0.75rem;
  }
}

@media (min-width: 900px) {
  .course-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 16.5rem;
    gap: 2.5rem;
    align-items: start;
  }

  .course-side {
    position: sticky;
    top: calc(var(--header-h) + 1.2rem);
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.15rem 1.2rem;
    box-shadow: var(--shadow);
  }

  .course-side h2 {
    margin: 0 0 0.6rem;
    font-size: 1rem;
  }

  .course-side ol {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--ink-soft);
    font-size: 0.92rem;
  }

  .course-side a {
    color: var(--ink-soft);
    text-decoration: none;
  }

  .course-side a:hover {
    color: var(--accent);
  }
}

@media (max-width: 899px) {
  .course-side {
    display: none;
  }
}

/* Viewer */

.viewer-page {
  padding: 1.5rem 0 2.5rem;
}

.viewer-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6rem 1.2rem;
  margin-bottom: 1rem;
}

.viewer-head h1 {
  font-size: 1.35rem;
  margin: 0;
  letter-spacing: 0.04em;
}

.viewer-head .back {
  font-size: 0.92rem;
  flex-shrink: 0;
}

.viewer-note {
  margin: 0 0 0.9rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.viewer-frame-wrap {
  height: calc(100vh - var(--header-h) - 8.5rem);
  min-height: 28rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper);
  box-shadow: var(--shadow);
  -webkit-user-select: none;
  user-select: none;
}

.viewer-frame-wrap iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

.viewer-error {
  background: var(--pending-bg);
  border: 1px dashed #c9ae6a;
  border-radius: var(--radius);
  padding: 1.5rem 1.2rem;
  color: var(--pending-ink);
}

/* About */

.ministry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin: 0.9rem 0 0;
  padding: 0;
  list-style: none;
}

.ministry-tags li {
  border: 1px solid var(--line-strong);
  background: var(--paper);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.ministry-tags li em {
  font-style: normal;
  color: var(--accent);
  font-size: 0.8rem;
  margin-left: 0.25rem;
}

.footer-inner {
  align-items: flex-end;
}


/* Graceful empty modules */

.quiet-empty {
  text-align: center;
  padding: 3.25rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.quiet-empty p {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.12rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.library-table-wrap.is-empty {
  border: 0;
  background: transparent;
  box-shadow: none;
}
.library-table-wrap.is-empty table {
  display: none;
}
.library-table-wrap.is-empty .empty-state.is-visible {
  display: block;
  margin: 0;
  padding: 3.25rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  font-family: var(--font-serif);
  font-size: 1.12rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}