:root {
  --sac-ink: #0f172a;
  --sac-muted: #64748b;
  --sac-line: #dbe3ef;
  --sac-panel: #ffffff;
  --sac-soft: #f6f8fb;
  --sac-blue: #1456d9;
  --sac-blue-dark: #0b3f9f;
  --sac-green: #0f9f76;
  --sac-amber: #f59e0b;
  --sac-shadow: 0 20px 45px rgba(15, 23, 42, .08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: #f4f7fb;
  color: var(--sac-ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

a { color: inherit; }

.sac-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 22px 24px;
}

.sac-brand {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.sac-brand img {
  display: block;
  width: 178px;
  max-width: 48vw;
  height: auto;
}

.sac-back,
.sac-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid var(--sac-line);
  border-radius: 8px;
  background: #fff;
  color: var(--sac-ink);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
}

.sac-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 24px;
  max-width: 1180px;
  margin: 0 auto 48px;
  padding: 0 24px;
  align-items: start;
}

.sac-main,
.sac-summary {
  border: 1px solid var(--sac-line);
  border-radius: 8px;
  background: var(--sac-panel);
  box-shadow: var(--sac-shadow);
}

.sac-main {
  padding: 30px;
}

.sac-kicker {
  color: var(--sac-blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.sac-main h1 {
  margin: 8px 0 8px;
  font-size: clamp(30px, 5vw, 44px);
  line-height: 1.05;
  letter-spacing: 0;
}

.sac-lead {
  max-width: 680px;
  margin: 0 0 24px;
  color: var(--sac-muted);
  font-size: 16px;
  line-height: 1.6;
}

.sac-package {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  margin: 0 0 24px;
  padding: 18px;
  border: 1px solid #cfe0ff;
  border-radius: 8px;
  background: #f8fbff;
}

.sac-package.empty {
  grid-template-columns: 1fr;
  border-color: var(--sac-line);
  background: var(--sac-soft);
}

.sac-package-features { grid-column: 1 / -1; }
.sac-package-features summary { cursor: pointer; font-weight: 600; }
.sac-package-features ul { margin-bottom: 0; padding-left: 22px; line-height: 1.7; }

.sac-package img {
  width: 76px;
  height: 76px;
  object-fit: contain;
}

.sac-package h2 {
  margin: 0 0 6px;
  font-size: 22px;
  letter-spacing: 0;
}

.sac-package p {
  margin: 0;
  color: var(--sac-muted);
  line-height: 1.5;
}

.sac-package-price {
  min-width: 150px;
  text-align: right;
}

.sac-package-price strong {
  display: block;
  font-size: 24px;
}

.sac-package-price span {
  display: block;
  margin-top: 4px;
  color: var(--sac-muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.sac-form {
  display: grid;
  gap: 22px;
}

.sac-section {
  display: grid;
  gap: 14px;
}

.sac-section h2 {
  margin: 0;
  font-size: 18px;
  letter-spacing: 0;
}

.sac-two {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.sac-field,
.sac-fieldset {
  display: grid;
  gap: 8px;
  min-width: 0;
  margin: 0;
  color: #334155;
  font-size: 13px;
  font-weight: 850;
}

.sac-field input,
.sac-field textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--sac-line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  color: var(--sac-ink);
  font: inherit;
  font-weight: 650;
  outline: none;
}

.sac-field textarea {
  resize: vertical;
}

.sac-field input:focus,
.sac-field textarea:focus {
  border-color: var(--sac-blue);
  box-shadow: 0 0 0 3px rgba(20, 86, 217, .12);
}

.sac-fieldset {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 0;
  border: 0;
}

.sac-fieldset legend {
  grid-column: 1 / -1;
  margin: 0 0 2px;
}

.sac-radio {
  position: relative;
}

.sac-radio input {
  position: absolute;
  opacity: 0;
  inset: 0;
}

.sac-radio span {
  display: grid;
  place-items: center;
  min-height: 44px;
  border: 1px solid var(--sac-line);
  border-radius: 8px;
  background: #fff;
  font-weight: 900;
}

.sac-radio input:checked + span {
  border-color: var(--sac-blue);
  background: #eaf2ff;
  color: var(--sac-blue-dark);
}

.sac-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.sac-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  min-width: 190px;
  border: 0;
  border-radius: 8px;
  padding: 0 22px;
  background: var(--sac-blue);
  color: #fff;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  cursor: pointer;
}

.sac-primary:hover {
  background: var(--sac-blue-dark);
}

.sac-primary:disabled {
  cursor: not-allowed;
  opacity: .55;
}

.sac-message {
  min-height: 20px;
  margin: 0;
  color: #b45309;
  font-size: 14px;
  font-weight: 800;
}

.sac-message.success {
  color: var(--sac-green);
}

.sac-summary {
  position: sticky;
  top: 18px;
  padding: 22px;
}

.sac-summary-top {
  display: grid;
  gap: 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--sac-line);
}

.sac-summary-top span {
  color: var(--sac-muted);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.sac-summary-top strong {
  font-size: 34px;
  line-height: 1;
}

.sac-breakdown {
  display: grid;
  gap: 11px;
  padding: 18px 0;
}

.sac-breakdown div {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  color: var(--sac-muted);
  font-size: 14px;
}

.sac-breakdown strong {
  color: var(--sac-ink);
}

.sac-status {
  min-height: 44px;
  padding: 13px 14px;
  border-radius: 8px;
  background: var(--sac-soft);
  color: var(--sac-muted);
  font-size: 13px;
  line-height: 1.5;
}

@media (max-width: 900px) {
  .sac-shell {
    grid-template-columns: 1fr;
  }

  .sac-summary {
    position: static;
    order: -1;
  }
}

@media (max-width: 640px) {
  .sac-header {
    padding: 16px;
  }

  .sac-shell {
    padding: 0 16px 32px;
  }

  .sac-main {
    padding: 22px;
  }

  .sac-package,
  .sac-two {
    grid-template-columns: 1fr;
  }

  .sac-package-price {
    text-align: left;
  }

  .sac-primary,
  .sac-secondary {
    width: 100%;
  }
}