:root {
  --brand-blue: #1a4fb0;
  --brand-blue-dark: #123a85;
  --brand-black: #0d0f12;
  --bg: #eef1f6;
  --card: #ffffff;
  --card-border: #d7dde6;
  --text: #14171c;
  --text-dim: #5b6472;
  --accent: var(--brand-blue);
  --accent-text: #ffffff;
  --green: #16803c;
  --red: #d3271e;
  --field-bg: #f7f9fc;
  --radius: 10px;
  --font-brand: "Oswald", "Arial Narrow", -apple-system, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

body {
  padding-bottom: 3rem;
}

.app-header {
  padding: 1.75rem 1.25rem 1.1rem;
  text-align: center;
}

.brand-mark {
  margin-bottom: 1rem;
}

.brand-badge {
  position: relative;
  display: inline-block;
  border: 3px solid var(--brand-blue);
  border-radius: 3px;
  padding: 0.3rem 1.1rem;
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 1.6rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brand-blue);
}

.brand-badge::before,
.brand-badge::after {
  content: "";
  position: absolute;
  width: 0;
  height: 0;
  border-style: solid;
}

.brand-badge::before {
  top: -3px;
  left: -3px;
  border-width: 11px 11px 0 0;
  border-color: var(--brand-black) transparent transparent transparent;
}

.brand-badge::after {
  bottom: -3px;
  right: -3px;
  border-width: 0 0 11px 11px;
  border-color: transparent transparent var(--brand-black) transparent;
}

.brand-sub {
  margin-top: 0.4rem;
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.4em;
  color: var(--brand-black);
}

.app-header h1 {
  margin: 1rem 0 0.25rem;
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 1.3rem;
  letter-spacing: 0.01em;
  color: var(--text);
}

.subtitle {
  margin: 0;
  color: var(--text-dim);
  font-size: 0.9rem;
}

main {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.1rem 1.3rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 2px rgba(13, 15, 18, 0.04);
}

.card h2 {
  margin: 0 0 1rem;
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  color: var(--brand-blue);
}

.section-hint {
  margin: -0.5rem 0 0.9rem;
  color: var(--text-dim);
  font-size: 0.85rem;
}

.field {
  margin-bottom: 1.1rem;
}

.field:last-child {
  margin-bottom: 0;
}

label, .q-label {
  display: block;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.q-label.small {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-dim);
  margin-top: 0.6rem;
}

.req { color: var(--brand-blue); }
.optional { color: var(--text-dim); font-weight: 400; font-size: 0.82rem; }

input[type="text"],
input[type="email"],
input[type="number"],
textarea {
  width: 100%;
  padding: 0.7rem 0.8rem;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--field-bg);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}

input:focus, textarea:focus, .toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.hint {
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--text-dim);
}

textarea {
  resize: vertical;
}

.toggle-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.toggle {
  flex: 1 1 auto;
  min-width: 4.5rem;
  padding: 0.65rem 0.9rem;
  border-radius: 8px;
  border: 1px solid var(--card-border);
  background: var(--field-bg);
  color: var(--text);
  font-family: var(--font-brand);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.toggle.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-text);
}

.yesno .toggle {
  flex: 1 1 0;
}

.hidden-field {
  display: none;
}

.hidden-field.visible {
  display: block;
}

.qty-followup.visible {
  margin-top: 0.6rem;
}

.slope-block {
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--card-border);
}

.slope-block:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.slope-block:first-child {
  padding-top: 0;
}

.slope-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-brand);
  font-weight: 600;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--brand-black);
}

.component-row {
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--card-border);
}

.component-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.check-label {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 500;
  font-size: 0.95rem;
  cursor: pointer;
  margin-bottom: 0;
}

.check-label input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  accent-color: var(--accent);
  flex-shrink: 0;
}

.qty-row {
  margin-top: 0.6rem;
  padding-left: 1.9rem;
}

.qty-row.sizes {
  flex-wrap: wrap;
  gap: 0.75rem;
}

.qty-row.sizes.visible {
  display: flex;
}

.size-field {
  flex: 1 1 5rem;
}

.size-field label {
  font-size: 0.78rem;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.qty-input {
  max-width: 8rem;
}

.qty-text {
  margin-bottom: 0.5rem;
}

.submit-area {
  text-align: center;
  padding: 0.5rem 0 2rem;
}

.primary-btn {
  width: 100%;
  padding: 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-text);
  font-family: var(--font-brand);
  font-size: 1.05rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  cursor: pointer;
}

.primary-btn:disabled {
  opacity: 0.6;
  cursor: default;
}

.primary-btn:active:not(:disabled) {
  background: var(--brand-blue-dark);
}

.reset-btn {
  display: block;
  margin: 0.85rem auto 0;
  padding: 0.4rem;
  border: none;
  background: none;
  color: var(--text-dim);
  font-size: 0.85rem;
  text-decoration: underline;
  cursor: pointer;
}

.status-msg {
  min-height: 1.4rem;
  margin: 0.8rem 0 0;
  font-size: 0.9rem;
  font-weight: 600;
}

.status-msg.error { color: var(--red); }
.status-msg.success { color: var(--green); }
.status-msg.pending { color: var(--text-dim); }

.field-error {
  border-color: var(--red) !important;
}