:root {
  color-scheme: light;
  --sb-green: #1b9a46;
  --sb-green-strong: #168a3d;
  --sb-green-soft: #bfe3cc;
  --sb-green-dark: #0b3a1f;
  --sb-ink: #0f2a1a;
  --sb-text: #1f2d25;
  --sb-muted: #6b7a70;
  --sb-border: #d7ddd9;
  --sb-border-focus: #9fd3b4;
  --sb-bg: #ffffff;
  --sb-field-bg: #ffffff;
  --sb-status-bg: #f3f4f3;
  --sb-danger: #c0392b;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100vh;
  font-family: "Helvetica Neue", Helvetica, Arial, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--sb-bg);
  color: var(--sb-text);
  -webkit-font-smoothing: antialiased;
}

/* ---------- layout ---------- */

.sb-page {
  width: min(1780px, 100% - 120px);
  margin: 0 auto;
  padding: 80px 0 120px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 120px;
  align-items: start;
}

.sb-intro h1 {
  margin: 0 0 24px;
  font-size: clamp(1.7rem, 2.4vw, 2.5rem);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--sb-ink);
}

.sb-intro p {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.55;
  color: var(--sb-text);
}

.sb-intro strong { font-weight: 700; color: var(--sb-ink); }

/* ---------- status bar ---------- */

.sb-status {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 24px;
  margin-bottom: 30px;
  background: var(--sb-status-bg);
  color: var(--sb-text);
  font-size: 0.95rem;
  box-shadow: 0 6px 14px rgba(0, 0, 0, 0.12);
}
.sb-status.is-error { background: #fdecea; color: var(--sb-danger); }
.sb-status.is-ok { background: #e8f6ec; color: var(--sb-green-dark); }
.sb-status.is-ok .sb-spinner,
.sb-status.is-error .sb-spinner { display: none; }

.sb-spinner {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px dotted var(--sb-ink);
  animation: sb-spin 1.2s linear infinite;
  flex: none;
}

@keyframes sb-spin { to { transform: rotate(360deg); } }

/* ---------- fields ---------- */

.sb-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px 24px;
}

.sb-field { position: relative; }
.sb-field-full { grid-column: 1 / -1; }

.sb-field input,
.sb-field textarea {
  width: 100%;
  min-height: 56px;
  padding: 12px 24px 0;
  border: 1px solid var(--sb-border);
  border-radius: 6px;
  background: var(--sb-field-bg);
  color: var(--sb-text);
  font: inherit;
  font-size: 1rem;
  outline: none;
  appearance: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.sb-field textarea {
  min-height: 110px;
  padding-top: 34px;
  padding-bottom: 12px;
  resize: vertical;
}

.sb-field input:focus,
.sb-field textarea:focus {
  border-color: var(--sb-border-focus);
  box-shadow: 0 0 0 3px rgba(27, 154, 70, 0.1);
}

.sb-field input.invalid,
.sb-field textarea.invalid { border-color: var(--sb-danger); }

/* Floating label: sits on the top border like the reference design. */
.sb-field label {
  position: absolute;
  top: -8px;
  left: 20px;
  padding: 0 8px;
  background: var(--sb-field-bg);
  color: var(--sb-muted);
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1;
  pointer-events: none;
  transition: top 120ms ease, font-size 120ms ease, color 120ms ease;
}

.sb-field textarea + label {
  top: 16px;
  left: 24px;
  padding: 0;
  background: transparent;
  font-size: 1rem;
  font-weight: 700;
  color: var(--sb-text);
}

.sb-field textarea:focus + label,
.sb-field textarea:not(:placeholder-shown) + label {
  top: 12px;
  font-size: 0.85rem;
}

.sb-field .req { color: var(--sb-green); }

.sb-field small,
.sb-check-error {
  display: block;
  min-height: 16px;
  margin: 6px 0 0 4px;
  color: var(--sb-danger);
  font-size: 0.78rem;
}

.sb-check-error { margin: -16px 0 10px 48px; }

/* ---------- checkboxes ---------- */

.sb-check {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 18px;
  cursor: pointer;
  font-size: 0.9rem;
  color: var(--sb-muted);
  user-select: none;
}
.sb-check + .sb-check-error + .sb-check { margin-top: 0; }

.sb-check input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.sb-checkbox {
  position: relative;
  width: 32px;
  height: 32px;
  border: 1px solid var(--sb-border);
  border-radius: 3px;
  background: #fff;
  flex: none;
  transition: border-color 120ms ease, background-color 120ms ease;
}

.sb-checkbox::after {
  content: "";
  position: absolute;
  left: 10px;
  top: 5px;
  width: 8px;
  height: 14px;
  border: solid var(--sb-green);
  border-width: 0 2.5px 2.5px 0;
  transform: rotate(45deg) scale(0);
  opacity: 0;
  transition: transform 120ms ease, opacity 120ms ease;
}

.sb-check input:checked + .sb-checkbox { border-color: var(--sb-green-soft); }
.sb-check input:checked + .sb-checkbox::after { transform: rotate(45deg) scale(1); opacity: 1; }
.sb-check input:focus-visible + .sb-checkbox { box-shadow: 0 0 0 3px rgba(27, 154, 70, 0.2); }
.sb-check.invalid .sb-checkbox { border-color: var(--sb-danger); }

.sb-check-text a {
  color: var(--sb-green);
  font-weight: 700;
  text-decoration: none;
}
.sb-check-text a:hover { text-decoration: underline; }

/* ---------- submit ---------- */

.sb-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 22px;
}

#submitButton {
  min-width: 150px;
  min-height: 52px;
  padding: 0 26px;
  border: 0;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: var(--sb-green);
  color: #fff;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background-color 160ms ease, transform 160ms ease, opacity 160ms ease;
}
#submitButton:hover:not(:disabled) { background: var(--sb-green-strong); transform: translateY(-1px); }
#submitButton:disabled { background: var(--sb-green-soft); cursor: not-allowed; }
#submitButton.is-sending { cursor: wait; }
.sb-button-arrow { flex: none; }

/* ---------- result ---------- */

.sb-result {
  margin-top: 22px;
  padding: 16px 20px;
  border: 1px solid var(--sb-border);
  border-radius: 6px;
  background: #fafbfa;
  font-size: 0.92rem;
}
.sb-result.error { border-color: rgba(192, 57, 43, 0.4); background: #fdf3f2; color: var(--sb-danger); }
.sb-result.warning { border-color: rgba(214, 158, 26, 0.5); background: #fff8e6; color: #7a5a00; }
.sb-result strong { display: block; margin-bottom: 6px; }
.sb-result pre {
  margin: 8px 0 0;
  font-size: 0.75rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--sb-muted);
}

/* ---------- thank-you page ---------- */

.sb-thanks-hero {
  position: relative;
  overflow: hidden;
  min-height: 270px;
  padding: 40px 40px 60px;
  background: var(--sb-green);
  color: #fff;
}

.sb-thanks-hero::before,
.sb-thanks-hero::after {
  content: "";
  position: absolute;
  right: 0;
  pointer-events: none;
}

.sb-thanks-hero::before {
  top: 0;
  width: 520px;
  height: 100%;
  background: rgba(255, 255, 255, 0.16);
  clip-path: polygon(100% 0, 0 0, 100% 100%);
}

.sb-thanks-hero::after {
  top: 0;
  width: 520px;
  height: 100%;
  background: rgba(255, 255, 255, 0.12);
  clip-path: polygon(30% 0, 0 55%, 100% 100%);
}

.sb-breadcrumb {
  position: relative;
  z-index: 1;
  margin: 0 0 20px;
  font-size: 0.85rem;
}
.sb-breadcrumb a { color: #fff; text-decoration: none; }
.sb-breadcrumb strong { font-weight: 700; }

.sb-thanks-hero h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.sb-thanks-band {
  min-height: 60px;
  background: var(--sb-green-dark);
}

.sb-thanks-body {
  width: min(1180px, 100% - 80px);
  margin: 0 auto;
  padding: 48px 0 100px;
  color: var(--sb-text);
  font-size: 1.1rem;
  line-height: 1.6;
}

.sb-thanks-body a {
  display: inline-block;
  margin-top: 20px;
  color: var(--sb-green);
  font-weight: 700;
  text-decoration: none;
}
.sb-thanks-body a:hover { text-decoration: underline; }

/* ---------- responsive ---------- */

@media (max-width: 1100px) {
  .sb-page { grid-template-columns: 1fr; gap: 56px; width: min(100% - 60px, 1780px); padding-top: 56px; }
}

@media (max-width: 640px) {
  .sb-page { width: min(100% - 32px, 1780px); padding-top: 32px; gap: 36px; }
  .sb-grid { grid-template-columns: 1fr; gap: 26px; }
  .sb-field input, .sb-field textarea { padding-left: 20px; padding-right: 20px; }
  .sb-field label { left: 12px; }
  .sb-field textarea + label { left: 20px; }
  .sb-check { gap: 14px; }
  .sb-check-error { margin-left: 54px; }
  .sb-actions { justify-content: stretch; }
  #submitButton { width: 100%; }
  .sb-thanks-hero { padding: 28px 20px 44px; }
  .sb-thanks-hero::before, .sb-thanks-hero::after { width: 60%; }
}