*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #009B7C;
  --color-primary-hover: #007c63;
  --color-secondary: #6b7280;
  --color-secondary-hover: #4b5563;
  --color-success: #16a34a;
  --color-success-hover: #15803d;
  --color-error: #dc2626;
  --color-error-bg: #fef2f2;
  --color-border: #d1d5db;
  --color-border-focus: #2563eb;
  --color-bg: #f3f4f6;
  --color-card: #ffffff;
  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-hint: #9ca3af;
  --color-progress-bg: #e5e7eb;
  --color-progress-fill: #2563eb;
  --radius: 8px;
  --radius-sm: 4px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  --transition: 0.18s ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1rem;
}

/* ── Wrapper ────────────────────────────── */
.form-wrapper {
  background: var(--color-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  width: 100%;
  max-width: 680px;
  overflow: hidden;
}

/* ── Header ─────────────────────────────── */
.form-header {
  background: var(--color-primary);
  color: #fff;
  padding: 1.75rem 2rem 1.25rem;
}

.form-header h1 {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 1.25rem;
}

.progress-bar-container {
  height: 6px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.progress-bar {
  height: 100%;
  background: #ffffff;
  border-radius: 99px;
  transition: width 0.35s ease;
  width: 0%;
}

.steps-indicator {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.step-pill {
  font-size: 0.75rem;
  padding: 0.2rem 0.65rem;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.7);
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}

.step-pill.active {
  background: #ffffff;
  color: var(--color-primary);
}

.step-pill.done {
  background: rgba(255, 255, 255, 0.5);
  color: #ffffff;
}

/* ── Section ─────────────────────────────── */
.form-section {
  display: none;
  padding: 2rem;
  animation: fadeIn 0.22s ease;
}

.form-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-border);
}

.section-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.section-subtitle a {
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
}

.section-subtitle a:hover {
  text-decoration: underline;
}

/* ── Fields ──────────────────────────────── */
.field-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.35rem;
}

.field-group label,
.label-block {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 0.4rem;
}

.field-group .hint {
  font-weight: 400;
  color: var(--color-text-muted);
  font-size: 0.82rem;
}

input[type="text"],
input[type="number"],
select {
  width: 100%;
  padding: 0.6rem 0.85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--color-text);
  background: #fff;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  appearance: none;
  -webkit-appearance: none;
}

input[type="text"]:focus,
input[type="number"]:focus,
select:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

input.invalid,
select.invalid {
  border-color: var(--color-error);
  background: var(--color-error-bg);
}

input.invalid:focus,
select.invalid:focus {
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15);
}

select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: #f3f4f6;
}

/* Select wrapper arrow */
.select-wrapper {
  position: relative;
}

.select-wrapper::after {
  content: "▾";
  position: absolute;
  right: 0.85rem;
  top: 50%;
  transform: translateY(-50%);
  pointer-events: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.select-wrapper select {
  padding-right: 2.25rem;
  cursor: pointer;
}

/* Error & hint text */
.field-error {
  font-size: 0.8rem;
  color: var(--color-error);
  margin-top: 0.3rem;
  min-height: 1rem;
  display: block;
}

.field-hint {
  font-size: 0.78rem;
  color: var(--color-hint);
  margin-top: 0.25rem;
}

/* ── Optgroup ────────────────────────────── */
optgroup {
  font-weight: 700;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

optgroup option {
  font-weight: 400;
  color: var(--color-text);
  text-transform: none;
  letter-spacing: 0;
}

/* ── File inputs ────────────────────────── */
.file-input-hidden {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.file-input-wrapper {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn-file {
  padding: 0.55rem 1rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background var(--transition);
  flex-shrink: 0;
}

.btn-file:hover {
  background: var(--color-primary-hover);
}

.file-name {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  word-break: break-all;
}

.file-name--selected {
  color: var(--color-text);
  font-weight: 500;
}

/* ── Checkboxes ──────────────────────────── */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.65rem;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.4;
  padding: 0.6rem 0.75rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: border-color var(--transition), background var(--transition);
  user-select: none;
}

.checkbox-label:hover {
  border-color: var(--color-primary);
  background: #eff6ff;
}

.checkbox-label input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  margin-top: 1px;
  transition: background var(--transition), border-color var(--transition);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.checkbox-label input[type="checkbox"]:checked + .checkbox-custom::after {
  content: "";
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}

.checkbox-label:has(input:checked) {
  border-color: var(--color-primary);
  background: #eff6ff;
}

/* ── Footer ──────────────────────────────── */
.form-footer {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 1.25rem 2rem;
  border-top: 1px solid var(--color-border);
  background: #f9fafb;
}

.btn {
  padding: 0.6rem 1.4rem;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), opacity var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-hover);
}

.btn-secondary {
  background: var(--color-secondary);
  color: #fff;
}

.btn-secondary:hover:not(:disabled) {
  background: var(--color-secondary-hover);
}

.btn-secondary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-success {
  background: var(--color-success);
  color: #fff;
}

.btn-success:hover {
  background: var(--color-success-hover);
}

.hidden {
  display: none !important;
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 480px) {
  body {
    padding: 0;
    align-items: flex-start;
  }

  .form-wrapper {
    border-radius: 0;
    box-shadow: none;
    min-height: 100vh;
  }

  .form-header {
    padding: 1.25rem 1.25rem 1rem;
  }

  .form-section {
    padding: 1.25rem;
  }

  .form-footer {
    padding: 1rem 1.25rem;
  }
}