:root {
  --bg: #ffffff;
  --panel: rgba(255, 251, 244, 0.95);
  --ink: #17202a;
  --muted: #59615e;
  --accent: #8a2f1d;
  --accent-dark: #5f1f13;
  --success: #285b3f;
  --warning: #8a5d10;
  --line: rgba(23, 32, 42, 0.12);
  --soft: #f7eee2;
  --soft-blue: #eaf1f4;
  --shadow: 0 28px 60px rgba(36, 24, 17, 0.12);
}

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

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "Space Grotesk", sans-serif;
  background: var(--bg);
}

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

input,
select,
button {
  font: inherit;
}

.exercise-topbar {
  display: flex;
  justify-content: flex-start;
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 16px 0;
}

.exercise-topbar__brand {
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 8px;
  text-decoration: none;
  flex: 0 0 auto;
  max-width: 100%;
}

.exercise-topbar__logo {
  display: block;
  width: auto;
  max-width: 100%;
  height: 70px;
}

.exercise-shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 48px;
}

.exercise-app {
  border-radius: 28px;
}

.hero,
.briefing,
.panel {
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(260px, 0.85fr);
  gap: 28px;
  padding: 34px;
  border-radius: 28px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 13ch;
  font-size: clamp(2.1rem, 5.4vw, 4.25rem);
  line-height: 0.98;
}

.lead,
.panel p,
.briefing p,
.briefing li {
  font-size: 1.06rem;
  line-height: 1.72;
}

.lead {
  max-width: 66ch;
}

.hero__metrics {
  display: grid;
  gap: 16px;
  align-content: end;
}

.metric-card {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid rgba(23, 32, 42, 0.09);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.82), rgba(247, 238, 226, 0.96));
}

.metric-card strong {
  display: block;
  margin-bottom: 6px;
  color: var(--accent-dark);
  font-size: 1.45rem;
}

.metric-card span {
  color: var(--muted);
  line-height: 1.55;
}

.briefing {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 24px;
  border-radius: 22px;
  overflow: hidden;
}

.briefing__card {
  padding: 26px 28px;
}

.briefing__card--accent {
  background: linear-gradient(180deg, #ecd0bf 0%, #f5dfd1 100%);
}

.briefing h2,
.panel h2 {
  margin: 0 0 10px;
  font-size: 1.55rem;
}

.briefing ul {
  margin: 0;
  padding-left: 20px;
}

.workbench {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.panel {
  padding: 28px;
  border-radius: 22px;
}

.panel__header {
  display: flex;
  gap: 18px;
  align-items: baseline;
  flex-wrap: wrap;
}

.panel__index {
  margin: 0;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.grid--two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--four {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 10px;
}

.field span,
.scenario h3,
.fixed-data strong {
  font-size: 0.95rem;
  font-weight: 700;
}

.field small {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.5;
}

input,
select {
  width: 100%;
  min-height: 52px;
  padding: 12px 14px;
  border: 1px solid rgba(23, 32, 42, 0.16);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.88);
  color: var(--ink);
}

input:focus,
select:focus {
  outline: 2px solid rgba(138, 47, 29, 0.22);
  border-color: var(--accent);
}

.scenario-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 18px;
}

.scenario {
  padding: 20px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.73);
  border: 1px solid rgba(23, 32, 42, 0.08);
}

.scenario p {
  margin-top: 8px;
}

.fixed-data {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 18px 0 0;
}

.fixed-data span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 7px 12px;
  border-radius: 999px;
  background: var(--soft-blue);
  color: #22343c;
  font-size: 0.93rem;
}

.hint {
  margin-top: 18px;
  padding: 15px 17px;
  border-radius: 16px;
  border-left: 6px solid var(--accent);
  background: rgba(255, 246, 232, 0.9);
  color: #493d34;
  font-size: 0.98rem;
  line-height: 1.65;
}

.panel--summary {
  background: linear-gradient(180deg, rgba(255, 251, 244, 0.96), rgba(244, 234, 220, 0.98));
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  min-height: 52px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button--primary {
  background: var(--accent);
  color: #fff9f5;
  box-shadow: 0 18px 35px rgba(138, 47, 29, 0.22);
}

.button--ghost {
  background: transparent;
  border-color: rgba(23, 32, 42, 0.16);
  color: var(--ink);
}

.result-card {
  margin-top: 22px;
  padding: 22px;
  border-radius: 18px;
  border: 1px solid rgba(23, 32, 42, 0.12);
  background: rgba(255, 255, 255, 0.84);
}

.result-card h3 {
  margin: 0 0 8px;
  font-size: 1.35rem;
}

.score-line {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 16px;
}

.score-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 74px;
  min-height: 74px;
  padding: 10px;
  border-radius: 50%;
  background: #fff4ea;
  color: var(--accent-dark);
  font-size: 1.35rem;
  font-weight: 700;
}

.score-caption {
  max-width: 64ch;
  color: var(--muted);
}

.feedback-list {
  display: grid;
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.feedback-item {
  padding: 14px 16px;
  border-radius: 14px;
  border-left: 6px solid var(--warning);
  background: rgba(255, 247, 230, 0.92);
}

.feedback-item--success {
  border-left-color: var(--success);
  background: rgba(234, 247, 239, 0.95);
}

.feedback-item strong {
  display: block;
  margin-bottom: 6px;
}

.exercise-footer {
  padding: 0 18px 28px;
}

.exercise-footer__inner {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 56px;
  flex-wrap: wrap;
}

.exercise-footer__logo-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.exercise-footer__logo {
  display: block;
  height: 32px;
  width: auto;
  object-fit: contain;
}

@media (max-width: 980px) {
  .hero,
  .briefing {
    grid-template-columns: 1fr;
  }

  .hero h1 {
    max-width: 18ch;
  }

  .grid,
  .grid--two,
  .grid--four,
  .scenario-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .exercise-shell {
    width: min(100vw - 18px, 1180px);
    padding: 16px 0 36px;
  }

  .hero,
  .panel,
  .briefing__card {
    padding: 20px;
  }

  .hero h1 {
    max-width: none;
    font-size: clamp(2rem, 12vw, 3.1rem);
  }

  .lead,
  .panel p,
  .briefing p,
  .briefing li {
    font-size: 1rem;
  }

  .exercise-footer__inner {
    gap: 34px;
  }

  .exercise-footer__logo {
    height: 28px;
  }
}