/* Planck checkout — Soft Minimal */

:root {
  /* Surface */
  --bg: #f6f7f9;
  --panel: #ffffff;
  --panel-soft: #fafbfc;

  /* Lines */
  --line: #ebeef2;
  --line-strong: #dde1e7;

  /* Text */
  --text: #0b1220;
  --muted: #6b7280;
  --muted-strong: #4b5563;

  /* Brand accent (cyan, по обложкам курсов) */
  --accent: #5ec9ec;
  --accent-dark: #0e5773;
  --accent-soft: #ecf6fb;

  /* Semantic */
  --success: #16a34a;
  --success-soft: #ecfdf3;
  --danger: #dc2626;
  --warn: #ea580c;
  --warn-soft: #fff1e8;

  /* Effects */
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 1px 2px rgba(15, 23, 42, 0.04), 0 8px 24px rgba(15, 23, 42, 0.05);

  /* Radius */
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 14px;
  --r-pill: 999px;

  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

button {
  cursor: pointer;
}

svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* ─── Topbar ───────────────────────────────────────────── */

.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(12px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.005em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: var(--text);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
}

.secure-note {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--muted);
  font-size: 12px;
}

.secure-note strong,
.secure-note small {
  display: block;
  line-height: 1.3;
}

.secure-note strong {
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}

.secure-icon {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  color: var(--accent-dark);
  background: var(--accent-soft);
  border-radius: 8px;
}

.secure-icon svg {
  width: 14px;
  height: 14px;
  stroke-width: 1.8;
}

/* ─── Page shell ───────────────────────────────────────── */

.page-shell {
  width: min(1280px, calc(100% - 40px));
  margin: 24px auto 48px;
}

.checkout-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 20px;
  align-items: start;
}

.catalog-panel,
.order-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}

.catalog-panel {
  padding: 22px 22px 18px;
}

/* ─── Section heads ────────────────────────────────────── */

.section-head,
.order-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-head > div:first-child,
.order-head {
  display: flex;
  align-items: center;
  gap: 10px;
}

h1,
h2 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.012em;
  color: var(--text);
}

h1 {
  font-size: 18px;
  font-weight: 600;
}

h2 {
  font-size: 16px;
  font-weight: 600;
}

.counter {
  display: inline-flex;
  align-items: center;
  height: 22px;
  padding: 0 8px;
  border-radius: 6px;
  background: #f1f3f5;
  color: var(--muted-strong);
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
}

.counter.accent {
  color: var(--accent-dark);
  background: var(--accent-soft);
}

/* ─── Toolbar / sort ───────────────────────────────────── */

.toolbar {
  display: flex;
  gap: 8px;
  align-items: center;
}

.sort-select {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--r-sm);
  color: var(--muted);
  font-size: 12px;
}

.sort-select > span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.sort-select select {
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 12px;
  font-weight: 500;
  outline: none;
  padding-right: 4px;
}

.tool-button {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: var(--r-sm);
  color: var(--muted-strong);
  font-size: 12px;
  font-weight: 500;
}

.tool-button svg {
  width: 14px;
  height: 14px;
}

/* ─── Exam tabs ────────────────────────────────────────── */

.exam-tabs {
  display: inline-grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  width: 240px;
  padding: 3px;
  margin: 0 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel-soft);
}

.exam-tab {
  height: 30px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted-strong);
  font-size: 13px;
  font-weight: 500;
  transition: background 140ms ease, color 140ms ease;
}

.exam-tab:hover {
  color: var(--text);
}

.exam-tab.active {
  background: var(--panel);
  color: var(--text);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

/* ─── Course list ──────────────────────────────────────── */

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

.course-card {
  display: grid;
  grid-template-columns: 144px minmax(0, 1fr) auto 32px;
  gap: 14px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--panel);
  transition: border-color 160ms ease, background 160ms ease;
}

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

.course-card.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.check-wrap {
  display: none;
}

.fake-check {
  display: none;
}

.course-art {
  height: 96px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  color: var(--text);
  overflow: hidden;
  position: relative;
  isolation: isolate;
  font-size: 26px;
  font-weight: 600;
  background: #f1f3f5;
}

.course-art::before,
.course-art::after {
  content: none;
}

.course-art > span {
  display: grid;
  place-items: center;
  gap: 4px;
  text-align: center;
}

.course-art small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  color: var(--muted);
}

.course-art img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.course-info {
  min-width: 0;
}

.course-title-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.course-info h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.005em;
  color: var(--text);
}

.course-info p {
  margin: 4px 0 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.course-info .course-accent {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 500;
}

.hot {
  display: inline-flex;
  align-items: center;
  height: 18px;
  padding: 0 6px;
  background: var(--warn-soft);
  color: var(--warn);
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.meta-row,
.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.meta {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--muted);
  font-size: 11px;
  line-height: 1;
}

.meta svg {
  width: 12px;
  height: 12px;
  color: var(--muted);
  stroke-width: 1.5;
}

.tag-row {
  margin-top: 8px;
  gap: 6px;
}

.tag {
  padding: 2px 7px;
  border-radius: 4px;
  background: #f1f3f5;
  color: var(--muted-strong);
  font-size: 11px;
  font-weight: 500;
}

.tag.blue {
  color: var(--accent-dark);
  background: var(--accent-soft);
}

.course-price {
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: -0.01em;
  color: var(--text);
}

.icon-action {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--panel);
  color: var(--text);
  transition: background 140ms ease, color 140ms ease, border-color 140ms ease;
}

.icon-action:hover {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

.icon-action svg {
  width: 14px;
  height: 14px;
}

.course-card.selected .icon-action {
  background: var(--text);
  color: #fff;
  border-color: var(--text);
}

.load-more {
  display: block;
  width: 140px;
  height: 34px;
  margin: 14px auto 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--muted-strong);
  font-size: 12px;
  font-weight: 500;
}

.load-more:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

/* ─── Order panel ──────────────────────────────────────── */

.order-panel {
  position: sticky;
  top: 88px;
  padding: 22px;
}

.order-items {
  display: grid;
  gap: 8px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  min-height: 0;
}

.order-empty {
  color: var(--muted);
  background: var(--panel-soft);
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  padding: 16px;
  font-size: 13px;
  text-align: center;
  line-height: 1.45;
}

.order-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) auto 24px;
  gap: 10px;
  align-items: center;
  padding: 4px 0;
}

.order-thumb {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-size: 13px;
  font-weight: 600;
}

.order-item h3 {
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
}

.order-item p {
  margin: 1px 0 0;
  color: var(--muted);
  font-size: 11px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.order-item strong {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.remove-item {
  width: 24px;
  height: 24px;
  border: 0;
  background: transparent;
  color: var(--muted);
  border-radius: 6px;
  display: grid;
  place-items: center;
}

.remove-item svg {
  width: 14px;
  height: 14px;
}

.remove-item:hover {
  color: var(--danger);
  background: #fef2f2;
}

/* ─── Summary ──────────────────────────────────────────── */

.summary-lines {
  display: grid;
  gap: 10px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.summary-lines > div,
.promo-line,
.total-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  font-size: 13px;
}

.summary-lines span,
.promo-line span {
  color: var(--muted);
}

.summary-lines strong {
  font-weight: 500;
  color: var(--text);
}

.discount strong {
  color: var(--success);
  font-weight: 600;
}

.promo-line input {
  width: 120px;
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel);
  text-align: right;
  font-size: 12px;
  font-weight: 500;
  color: var(--text);
  outline: none;
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.promo-line input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.total-line {
  padding-top: 4px;
}

.total-line span {
  font-size: 14px;
  color: var(--text);
  font-weight: 500;
}

.total-line strong {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1;
}

/* ─── Payment form ─────────────────────────────────────── */

.payment-form {
  padding-top: 18px;
}

fieldset {
  margin: 0 0 16px;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.payment-form fieldset {
  display: grid;
  gap: 8px;
}

.payment-form fieldset > label {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 42px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--muted);
  background: var(--panel);
  transition: border-color 140ms ease, box-shadow 140ms ease;
}

.payment-form fieldset > label:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.payment-form fieldset > label.field-invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.08);
}

.payment-form input {
  width: 100%;
  border: 0;
  outline: none;
  color: var(--text);
  background: transparent;
  font-size: 14px;
  font-weight: 500;
}

.payment-form input::placeholder {
  color: var(--muted);
  font-weight: 400;
}

.payment-form label svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  color: var(--muted);
}

/* ─── Payment methods ──────────────────────────────────── */

.payment-methods {
  display: grid;
  gap: 8px;
}

.method {
  position: relative;
  min-height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--panel);
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease;
}

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

.method.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.method input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.method strong,
.method small {
  display: block;
  line-height: 1.3;
}

.method strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.method small {
  color: var(--muted);
  font-size: 11px;
  margin-top: 1px;
}

.card-icon,
.sbp-icon,
.wallet-icon {
  width: 28px;
  height: 20px;
  border-radius: 4px;
  flex: 0 0 auto;
}

.card-icon {
  background: linear-gradient(135deg, #0f9f6e, #16a34a);
}

.sbp-icon {
  background: linear-gradient(135deg, #22c55e, #3b82f6 50%, #a855f7);
  clip-path: polygon(0 0, 100% 50%, 0 100%, 24% 50%);
}

.wallet-icon {
  background: linear-gradient(135deg, #7c3aed, #a855f7);
}

/* ─── Pay button ───────────────────────────────────────── */

.pay-button {
  width: 100%;
  height: 48px;
  display: grid;
  grid-template-columns: 18px 1fr auto;
  align-items: center;
  gap: 10px;
  border: 0;
  border-radius: var(--r-md);
  padding: 0 16px;
  color: #fff;
  background: var(--text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.005em;
  transition: background 140ms ease, transform 80ms ease;
}

.pay-button svg {
  width: 16px;
  height: 16px;
}

.pay-button strong {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.pay-button:hover:not(:disabled) {
  background: #1f2937;
}

.pay-button:active:not(:disabled) {
  transform: translateY(1px);
}

.pay-button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.legal {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.45;
  text-align: center;
}

.checkout-result {
  margin-top: 14px;
  padding: 12px 14px;
  border: 1px solid var(--accent);
  border-radius: var(--r-md);
  color: var(--accent-dark);
  background: var(--accent-soft);
  font-size: 13px;
  line-height: 1.5;
}

/* ─── Responsive ───────────────────────────────────────── */

@media (max-width: 1120px) {
  .checkout-grid {
    grid-template-columns: 1fr;
  }

  .order-panel {
    position: static;
  }
}

@media (max-width: 760px) {
  .topbar {
    height: auto;
    min-height: 56px;
    padding: 12px 16px;
    gap: 10px;
  }

  .secure-note {
    font-size: 11px;
  }

  .secure-note strong {
    font-size: 12px;
  }

  .page-shell {
    width: calc(100% - 24px);
    margin-top: 14px;
  }

  .catalog-panel {
    padding: 18px 14px 14px;
  }

  .order-panel {
    padding: 18px;
  }

  .section-head {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .section-head > div:first-child {
    justify-content: space-between;
  }

  .toolbar {
    justify-content: flex-start;
  }

  .exam-tabs {
    width: 100%;
  }

  .course-card {
    grid-template-columns: 96px minmax(0, 1fr) 32px;
    gap: 12px;
  }

  .course-art {
    height: 80px;
  }

  .course-price {
    grid-column: 2 / 3;
    justify-self: start;
    margin-top: 4px;
  }

  .icon-action {
    grid-column: 3;
    grid-row: 1 / 3;
    align-self: center;
  }

  .total-line strong {
    font-size: 20px;
  }
}