:root {
  --crimson: #8f1d2c;
  --crimson-dark: #671521;
  --ink: #18202a;
  --muted: #627080;
  --line: #d9dee5;
  --paper: #f7f3ec;
  --panel: #ffffff;
  --teal: #166a72;
  --gold: #b98225;
  --mint: #e3f2ee;
  --shadow: 0 18px 45px rgba(24, 32, 42, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: #fbfaf7;
}

button,
input,
textarea,
select {
  font: inherit;
}

button,
select {
  cursor: pointer;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 12px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  flex: 0 0 42px;
  color: #fff;
  background: var(--crimson);
  border-radius: 8px;
  font-weight: 800;
}

.brand p,
.eyebrow {
  margin: 0 0 4px;
  color: var(--crimson);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.brand h1 {
  margin: 0;
  font-size: clamp(1rem, 1.8vw, 1.35rem);
  line-height: 1.1;
}

.top-nav {
  display: flex;
  gap: 8px;
}

.top-nav a,
button {
  min-height: 38px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
  text-decoration: none;
  font-weight: 700;
}

textarea {
  resize: vertical;
}

.top-nav a:hover,
button:hover {
  border-color: var(--crimson);
  color: var(--crimson);
}

.testing-notice {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 11px clamp(18px, 4vw, 56px);
  color: #5c4314;
  background: #fff4d8;
  border-bottom: 1px solid #ebd49e;
  font-size: 0.92rem;
  line-height: 1.45;
}

.testing-notice strong {
  flex: 0 0 auto;
  color: #7a3217;
}

.hero {
  position: relative;
  min-height: clamp(520px, 78vh, 720px);
  overflow: hidden;
  background: var(--ink);
}

.hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(17, 23, 31, 0.84), rgba(17, 23, 31, 0.45) 48%, rgba(17, 23, 31, 0.12));
}

.hero-overlay {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: center;
  gap: 24px;
  min-height: inherit;
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
  padding: 42px 0 96px;
  color: #fff;
}

.hero-copy {
  max-width: 720px;
}

.hero-copy h2 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(2.2rem, 5.4vw, 5.2rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy p:last-child {
  max-width: 620px;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(1rem, 1.6vw, 1.22rem);
  line-height: 1.6;
}

.hero-search {
  display: grid;
  gap: 8px;
  max-width: 680px;
}

.hero-search label {
  font-weight: 800;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr 44px;
  gap: 10px;
}

.search-row input {
  min-width: 0;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  outline: none;
}

.search-row input::placeholder {
  color: rgba(255, 255, 255, 0.72);
}

.icon-button {
  display: grid;
  place-items: center;
  min-width: 44px;
  padding: 0;
}

.icon-button svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
  stroke-linecap: round;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(1120px, calc(100% - 36px));
  margin: -58px auto 42px;
  position: relative;
  z-index: 2;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.metrics div {
  display: grid;
  gap: 4px;
  padding: 18px;
  background: #fff;
}

.metrics strong {
  font-size: 1.45rem;
}

.metrics span {
  color: var(--muted);
  font-weight: 700;
}

.workspace {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto 54px;
  align-items: start;
}

.filters {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 12px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.filter-heading,
.section-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.filter-heading h2,
.section-toolbar h2,
.fit-copy h2 {
  margin: 0;
}

label,
legend,
.sort-control {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 800;
}

select,
input[type="search"],
input[type="text"],
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

select {
  min-height: 42px;
  padding: 0 34px 0 12px;
}

input[type="text"],
textarea {
  padding: 11px 12px;
}

fieldset {
  display: grid;
  gap: 10px;
  margin: 6px 0 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.check {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--ink);
  font-weight: 700;
}

.catalog-panel {
  min-width: 0;
}

.seminar-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.seminar-card {
  display: grid;
  gap: 14px;
  min-height: 310px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(24, 32, 42, 0.07);
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.seminar-card h3 {
  margin: 0;
  font-size: 1.18rem;
  line-height: 1.24;
}

.course-code {
  display: block;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 3px 8px;
  border-radius: 999px;
  color: var(--teal);
  background: var(--mint);
  font-size: 0.78rem;
  font-weight: 800;
}

.summary {
  margin: 0;
  color: #3f4b58;
  line-height: 1.55;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.meta-grid span {
  padding: 8px;
  border: 1px solid #e8ebef;
  border-radius: 8px;
  color: #43505d;
  background: #fafafa;
  font-size: 0.86rem;
  font-weight: 700;
}

.keyword-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

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

.card-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: auto;
}

.card-actions button.active {
  border-color: var(--crimson);
  color: #fff;
  background: var(--crimson);
}

.compare-band,
.fit-band,
.feedback-band {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto 54px;
  padding: 28px;
  border-top: 4px solid var(--crimson);
  background: #fff;
}

.compare-table {
  overflow-x: auto;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
}

th,
td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--crimson-dark);
  background: #fff7f3;
}

.placeholder,
.empty-state {
  margin: 0;
  padding: 22px;
  color: var(--muted);
  background: #f5f7f8;
  border-radius: 8px;
  font-weight: 700;
}

.fit-band {
  display: grid;
  grid-template-columns: 0.8fr 0.9fr 1fr;
  gap: 24px;
  align-items: start;
}

.fit-copy p:last-child,
.feedback-copy p:last-child {
  color: var(--muted);
  line-height: 1.55;
}

.fit-form,
.feedback-form {
  display: grid;
  gap: 10px;
}

.feedback-band {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 28px;
  border-top-color: var(--teal);
}

.feedback-copy h2 {
  margin: 0;
}

.feedback-form fieldset {
  margin: 0;
}

.send-feedback {
  color: #fff;
  border-color: var(--crimson);
  background: var(--crimson);
}

.feedback-status {
  min-height: 20px;
  margin: 0;
  color: var(--teal);
  font-weight: 800;
}

.fit-results {
  display: grid;
  gap: 10px;
}

.fit-result {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfaf7;
}

.fit-result strong {
  display: block;
  margin-bottom: 6px;
}

.score-bar {
  height: 8px;
  margin-top: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #e7e9ed;
}

.score-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--crimson), var(--gold));
}

footer {
  padding: 28px 18px 42px;
  color: var(--muted);
  text-align: center;
}

@media (max-width: 880px) {
  .app-header,
  .workspace,
  .fit-band,
  .feedback-band {
    grid-template-columns: 1fr;
  }

  .app-header {
    display: grid;
  }

  .top-nav {
    overflow-x: auto;
  }

  .metrics,
  .seminar-grid {
    grid-template-columns: 1fr 1fr;
  }

  .filters {
    position: static;
  }
}

@media (max-width: 580px) {
  .testing-notice {
    display: grid;
    gap: 2px;
  }

  .hero {
    min-height: 680px;
  }

  .hero::after {
    background: rgba(17, 23, 31, 0.66);
  }

  .hero-copy h2 {
    font-size: 2.45rem;
  }

  .metrics,
  .seminar-grid,
  .meta-grid,
  .card-actions {
    grid-template-columns: 1fr;
  }

  .compare-band,
  .fit-band,
  .feedback-band {
    padding: 20px;
  }
}