:root {
  color-scheme: light;
  --bg: #f5f3ee;
  --panel: #ffffff;
  --ink: #20231f;
  --muted: #667064;
  --line: #d9ddd4;
  --line-strong: #b8c0b0;
  --accent: #176b5d;
  --accent-ink: #0d3d35;
  --accent-soft: #e4f0ec;
  --navy: #24364b;
  --amber: #bb7b17;
  --red: #b44b40;
  --blue: #2d6f9f;
  --violet: #6b5ca8;
  --shadow: 0 18px 42px rgba(32, 35, 31, 0.1);
  --card-shadow: 0 10px 22px rgba(32, 35, 31, 0.08);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", "Apple SD Gothic Neo", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(36, 54, 75, 0.045) 1px, transparent 1px),
    linear-gradient(0deg, rgba(36, 54, 75, 0.04) 1px, transparent 1px),
    var(--bg);
  background-size: 32px 32px;
  line-height: 1.55;
  word-break: keep-all;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

.shell {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  padding: 38px 0 28px;
  background:
    linear-gradient(120deg, rgba(23, 107, 93, 0.08), rgba(187, 123, 23, 0.08)),
    #ffffff;
  border-bottom: 1px solid var(--line);
}

.header-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.12;
}

h1 {
  font-size: clamp(2.1rem, 4.5vw, 4.35rem);
}

h2 {
  font-size: clamp(1.45rem, 2vw, 2rem);
}

.subtitle {
  max-width: 680px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.status-panel {
  display: grid;
  min-width: 188px;
  gap: 3px;
  padding: 16px 18px;
  border: 1px solid rgba(23, 107, 93, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--card-shadow);
}

.status-label {
  color: var(--muted);
  font-size: 0.82rem;
}

.status-panel strong {
  font-size: 1.75rem;
  line-height: 1;
}

.status-panel span:last-child {
  color: var(--muted);
  font-size: 0.84rem;
}

.toolbar-band {
  position: sticky;
  top: 0;
  z-index: 5;
  padding: 12px 0;
  background: rgba(245, 243, 238, 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
}

.search-box {
  display: grid;
  grid-template-columns: auto minmax(190px, 380px);
  gap: 10px;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 6px 14px rgba(32, 35, 31, 0.04);
}

.search-box span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 800;
}

.search-box input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
}

.filter-chips {
  display: flex;
  gap: 8px;
  align-items: center;
  overflow-x: auto;
  padding: 2px 0;
}

.chip {
  min-height: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 10px;
  background: #ffffff;
  color: var(--ink);
  cursor: pointer;
  white-space: nowrap;
}

.chip:hover {
  border-color: var(--line-strong);
}

.chip[aria-pressed="true"] {
  border-color: var(--accent);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-weight: 850;
}

.section-block {
  padding: 34px 0 4px;
}

.section-heading {
  display: flex;
  gap: 16px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-meta {
  margin: 0 0 2px;
  color: var(--muted);
  font-size: 0.92rem;
}

.section-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: flex-end;
}

.section-toggle {
  min-height: 36px;
  padding: 0 14px;
  border: 1px solid rgba(36, 54, 75, 0.18);
  border-radius: 8px;
  background: var(--panel);
  color: var(--navy);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 850;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.section-toggle:hover,
.section-toggle:focus-visible {
  border-color: rgba(18, 87, 117, 0.45);
  background: #ffffff;
  box-shadow: 0 8px 18px rgba(32, 35, 31, 0.1);
  outline: 2px solid rgba(18, 87, 117, 0.18);
  outline-offset: 2px;
}

.exam-archive-section {
  padding-top: 30px;
}

.exam-archive {
  overflow: hidden;
  border: 1px solid rgba(36, 54, 75, 0.15);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.exam-year {
  display: grid;
  grid-template-columns: 122px minmax(0, 1fr);
  border-top: 1px solid var(--line);
}

.exam-year:first-child {
  border-top: 0;
}

.exam-year-heading {
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 18px;
  border-right: 1px solid var(--line);
  background: #f8f9f4;
}

.exam-year-heading h3 {
  margin: 0;
  color: var(--navy);
  font-size: 1.25rem;
  line-height: 1;
}

.exam-year-heading span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.exam-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: stretch;
  padding: 14px;
}

.exam-link {
  --exam-color: var(--navy);
  display: grid;
  flex: 1 1 210px;
  min-width: 190px;
  gap: 8px;
  padding: 13px 14px;
  border: 1px solid rgba(32, 35, 31, 0.1);
  border-left: 5px solid var(--exam-color);
  border-radius: 8px;
  background: #ffffff;
  color: var(--ink);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.exam-link:hover,
.exam-link:focus-visible {
  border-color: rgba(32, 35, 31, 0.18);
  border-left-color: var(--exam-color);
  box-shadow: 0 12px 24px rgba(32, 35, 31, 0.12);
  outline: 2px solid color-mix(in srgb, var(--exam-color), white 70%);
  outline-offset: 2px;
  transform: translateY(-2px);
}

.exam-link-top {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.exam-link-top strong {
  font-size: 0.98rem;
  line-height: 1.2;
}

.exam-link-top span {
  min-height: 24px;
  padding: 2px 7px;
  border-radius: 7px;
  background: color-mix(in srgb, var(--exam-color), white 88%);
  color: color-mix(in srgb, var(--exam-color), #111111 24%);
  font-size: 0.77rem;
  font-weight: 850;
  white-space: nowrap;
}

.exam-note {
  color: var(--amber);
  font-size: 0.8rem;
  font-weight: 750;
  line-height: 1.32;
}

.exam-note-ok {
  color: var(--accent);
}

.exam-link-formative {
  --exam-color: var(--accent);
}

.exam-link-summative {
  --exam-color: var(--blue);
}

.exam-link-restored {
  --exam-color: var(--amber);
}

.schedule-view {
  display: grid;
  gap: 22px;
}

.week-block {
  overflow: hidden;
  border: 1px solid rgba(36, 54, 75, 0.15);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.week-title {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px;
  background: #213a35;
  color: #ffffff;
}

.week-title > div {
  display: grid;
  gap: 3px;
}

.week-kicker {
  color: #a8d8cc;
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.week-title strong {
  font-size: 1.16rem;
}

.week-count {
  min-height: 30px;
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.11);
  color: #edf7f4;
  font-size: 0.88rem;
  font-weight: 800;
}

.grid-scroller {
  overflow-x: auto;
  background: #dfe5dd;
}

.schedule-grid {
  display: grid;
  min-width: 880px;
  gap: 1px;
  align-items: stretch;
  background: #dfe5dd;
}

.schedule-cell {
  min-height: 126px;
  padding: 12px;
  background: #ffffff;
}

.schedule-head {
  position: sticky;
  top: 0;
  z-index: 2;
  min-height: 74px;
  background: #f8f9f4;
}

.period-corner {
  left: 0;
  z-index: 4;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-weight: 900;
}

.period-head {
  position: sticky;
  left: 0;
  z-index: 3;
  display: grid;
  align-content: start;
  min-height: 126px;
  background: #f8f9f4;
  color: var(--accent-ink);
  font-size: 0.88rem;
  font-weight: 950;
  line-height: 1.35;
  white-space: pre-line;
}

.period-head::after {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  margin-top: 10px;
  border-radius: 999px;
  background: var(--accent);
}

.date-head {
  display: grid;
  align-content: center;
  gap: 4px;
  border-top: 4px solid var(--accent);
}

.date-head span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}

.date-head strong {
  color: var(--navy);
  font-size: 1.2rem;
}

.lesson-slot {
  display: grid;
  align-content: stretch;
  gap: 10px;
  background: #fbfbf8;
}

.span-slot {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.74), rgba(255, 255, 255, 0.74)),
    repeating-linear-gradient(0deg, transparent, transparent 125px, #dfe5dd 125px, #dfe5dd 126px);
}

.empty-cell {
  place-items: center;
  background:
    repeating-linear-gradient(-45deg, #fbfbf8, #fbfbf8 9px, #f0f2ec 9px, #f0f2ec 18px);
}

.empty-line {
  display: block;
  width: 38px;
  height: 2px;
  border-radius: 999px;
  background: #cfd6cc;
}

.lesson-link {
  --tag-color: var(--accent);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 10px;
  height: 100%;
  min-height: 102px;
  padding: 13px 13px 12px;
  border: 1px solid rgba(32, 35, 31, 0.08);
  border-left: 5px solid var(--tag-color);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--card-shadow);
  text-decoration: none;
  transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.lesson-link:hover,
.lesson-link:focus-visible {
  border-color: rgba(32, 35, 31, 0.16);
  border-left-color: var(--tag-color);
  box-shadow: 0 16px 28px rgba(32, 35, 31, 0.14);
  outline: 2px solid color-mix(in srgb, var(--tag-color), white 68%);
  outline-offset: 2px;
  transform: translateY(-2px);
}

.lesson-link-wide {
  min-height: 228px;
  align-content: stretch;
}

.lesson-kicker,
.card-top,
.lesson-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.lesson-title {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1.32;
}

.lesson-open {
  justify-self: start;
  color: color-mix(in srgb, var(--tag-color), #111111 22%);
  font-size: 0.82rem;
  font-weight: 850;
}

.period-pill,
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 2px 7px;
  border-radius: 7px;
  font-size: 0.77rem;
  font-weight: 850;
}

.period-pill {
  background: #f0eee6;
  color: #5b5242;
}

.tag {
  background: color-mix(in srgb, var(--tag-color), white 86%);
  color: color-mix(in srgb, var(--tag-color), #111111 24%);
}

.tag-prof-park {
  --tag-color: var(--accent);
}

.tag-prof-kim-dh {
  --tag-color: var(--red);
}

.tag-prof-han {
  --tag-color: var(--blue);
}

.tag-prof-shin {
  --tag-color: var(--amber);
}

.tag-prof-kim-mj {
  --tag-color: var(--violet);
}

.tag-prof-kim-wk {
  --tag-color: #4f5f24;
}

.tag-prof-lee {
  --tag-color: #8a4d8f;
}

.tag-prof-son {
  --tag-color: #8f5f24;
}

.tag-prof-song {
  --tag-color: #3d6f80;
}

.tag-default {
  --tag-color: var(--navy);
}

.lecture-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 14px;
  padding-bottom: 36px;
}

.lecture-card {
  --tag-color: var(--accent);
  display: grid;
  gap: 14px;
  min-height: 164px;
  padding: 16px;
  border: 1px solid rgba(32, 35, 31, 0.1);
  border-top: 5px solid var(--tag-color);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  box-shadow: 0 8px 18px rgba(32, 35, 31, 0.06);
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.lecture-card:hover,
.lecture-card:focus-visible {
  border-color: rgba(32, 35, 31, 0.18);
  border-top-color: var(--tag-color);
  box-shadow: 0 16px 28px rgba(32, 35, 31, 0.12);
  outline: 0;
  transform: translateY(-2px);
}

.lecture-card h3 {
  margin: 0;
  font-size: 1.03rem;
  line-height: 1.35;
}

.card-top {
  justify-content: space-between;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.lecture-card .card-foot {
  align-self: end;
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: center;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 750;
}

.lecture-card .card-foot span:last-child {
  color: color-mix(in srgb, var(--tag-color), #111111 24%);
}

.no-results {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--muted);
}

.site-footer {
  padding: 26px 0 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

code {
  padding: 2px 5px;
  border-radius: 4px;
  background: #f2e6cf;
  color: #513b13;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

@media (max-width: 760px) {
  .header-layout,
  .toolbar,
  .section-heading {
    display: grid;
    grid-template-columns: 1fr;
  }

  .section-actions {
    justify-content: flex-start;
  }

  .status-panel {
    width: 100%;
  }

  .search-box {
    grid-template-columns: 1fr;
    gap: 2px;
    padding: 8px 12px;
  }

  .toolbar-band {
    position: static;
  }

  .exam-year {
    grid-template-columns: 1fr;
  }

  .exam-year-heading {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .exam-link {
    min-width: 100%;
  }

  .schedule-grid {
    min-width: 760px;
  }

  .schedule-cell,
  .period-head {
    min-height: 116px;
  }
}