:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --surface: #ffffff;
  --surface-strong: #f0f4ef;
  --ink: #17211d;
  --muted: #65716a;
  --line: #d8ded7;
  --green: #2f6f52;
  --green-dark: #1e513b;
  --coral: #c9634a;
  --amber: #a46a15;
  --danger: #b73f36;
  --shadow: 0 16px 40px rgba(25, 36, 31, 0.08);
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

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

button {
  cursor: pointer;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(18px, 4vw, 56px) 18px;
}

.brand {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 0.82rem;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.02;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 4px;
  font-size: 1.1rem;
  line-height: 1.25;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 420px);
  gap: 18px;
  padding: 0 clamp(18px, 4vw, 56px) 40px;
  align-items: start;
}

.catalog-panel,
.checkout-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.catalog-panel {
  min-width: 0;
  padding: 18px;
}

.checkout-panel {
  position: sticky;
  top: 16px;
  padding: 18px;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 18px;
}

.panel-heading p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.filters {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 680;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 11px;
  background: #fff;
  color: var(--ink);
  outline: none;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(47, 111, 82, 0.13);
}

.class-list {
  display: grid;
  gap: 10px;
}

.class-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.class-card.selected {
  border-color: rgba(47, 111, 82, 0.55);
  background: #f5faf6;
}

.class-main {
  min-width: 0;
}

.class-title {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 7px;
}

.class-title h3 {
  margin: 0;
  font-size: 1rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  min-height: 22px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--surface-strong);
  color: var(--green-dark);
  font-size: 0.75rem;
  font-weight: 720;
}

.class-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 0.88rem;
}

.price-stack {
  display: grid;
  justify-items: end;
  gap: 8px;
}

.price {
  font-size: 1.06rem;
  font-weight: 800;
}

.primary-button,
.secondary-button,
.ghost-button,
.select-button,
.remove-button {
  border: 0;
  border-radius: var(--radius);
  min-height: 40px;
  padding: 0 13px;
  font-weight: 760;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.primary-button {
  width: 100%;
  background: var(--green);
  color: #fff;
}

.primary-button:hover,
.select-button:hover {
  background: var(--green-dark);
}

.secondary-button,
.ghost-button,
.remove-button {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}

.ghost-button {
  width: 48px;
}

.select-button {
  min-width: 96px;
  background: var(--green);
  color: #fff;
}

.select-button.selected {
  background: #24372e;
}

.select-button:disabled {
  cursor: not-allowed;
  background: #c8d1ca;
}

.remove-button {
  min-height: 32px;
  padding: 0 10px;
  color: var(--danger);
}

.status-message {
  min-height: 22px;
  margin-bottom: 8px;
  color: var(--danger);
  font-size: 0.9rem;
}

.cart-list {
  display: grid;
  gap: 8px;
  margin: 14px 0;
}

.cart-list.empty {
  padding: 16px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.9rem;
}

.cart-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.cart-item strong {
  display: block;
  margin-bottom: 3px;
}

.cart-item span {
  color: var(--muted);
  font-size: 0.84rem;
}

.totals {
  display: grid;
  gap: 8px;
  margin: 16px 0 20px;
}

.totals div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.totals dt {
  color: var(--muted);
}

.totals dd {
  margin: 0;
  font-weight: 780;
}

.total-row {
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 1.14rem;
}

.booking-form {
  display: grid;
  gap: 14px;
}

fieldset {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 2px;
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 820;
}

.radio-line {
  grid-template-columns: auto 1fr;
  align-items: center;
  justify-content: start;
  color: var(--ink);
  font-weight: 640;
}

.radio-line input {
  width: auto;
}

.confirmation-panel {
  margin-top: 16px;
  padding: 14px;
  border-radius: var(--radius);
  background: #f6faf7;
  border: 1px solid #cce0d2;
}

.confirmation-panel h3 {
  margin-bottom: 8px;
}

.confirmation-panel p {
  margin-bottom: 8px;
  color: var(--muted);
}

.confirmation-actions {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.hidden {
  display: none;
}

dialog {
  width: min(460px, calc(100% - 28px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.settings-form {
  display: grid;
  gap: 14px;
}

menu {
  display: flex;
  justify-content: end;
  gap: 10px;
  margin: 0;
  padding: 0;
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .checkout-panel {
    position: static;
  }
}

@media (max-width: 680px) {
  .topbar {
    padding-top: 18px;
  }

  .filters,
  .class-card {
    grid-template-columns: 1fr;
  }

  .price-stack {
    justify-items: stretch;
  }

  .select-button {
    width: 100%;
  }
}