:root {
  --green: #2E936F;
  --green-light: #3aad84;
  --green-pale: #eaf5f0;
  --green-border: #c2e0d5;
  --text-dark: #1a1a1a;
  --text-body: #3d3d3d;
  --text-muted: #7a7a7a;
  --border: #d4e8e0;
  --bg: #f4f6f4;
  --card: #ffffff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  font-family: 'Red Hat Text', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-body);
  background: var(--bg);
  min-height: 100vh;
}

.app-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-logo {
  width: 38px;
  height: 38px;
  background: var(--green);
  color: #fff;
  border-radius: 9px;
  font-family: 'Red Hat Display', sans-serif;
  font-weight: 800;
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-title {
  font-family: 'Red Hat Display', sans-serif;
  font-weight: 800;
  font-size: 18px;
  color: var(--text-dark);
  line-height: 1;
}

.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 3px;
}

.app-main {
  display: grid;
  grid-template-columns: 440px minmax(0, 1fr);
  gap: 24px;
  padding: 24px 32px;
  max-width: 1600px;
  margin: 0 auto;
}

@media (max-width: 1040px) {
  .app-main { grid-template-columns: 1fr; }
}

.panel, .preview-panel {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}

.panel-heading {
  font-family: 'Red Hat Display', sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 12px 0;
}

.panel-heading + * { margin-top: 0; }
.panel .panel-heading + .dropzone { margin-bottom: 18px; }
.panel .panel-heading:not(:first-child) { margin-top: 22px; }

.dropzone {
  display: block;
  border: 2px dashed var(--green-border);
  background: var(--green-pale);
  color: var(--green);
  padding: 28px 18px;
  border-radius: 10px;
  text-align: center;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}

.dropzone:hover, .dropzone.drag {
  background: #def0e6;
  border-color: var(--green);
}

.dz-icon {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 6px;
}

.dz-title {
  font-family: 'Red Hat Display', sans-serif;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-dark);
}

.dz-sub {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

.dz-file {
  margin-top: 8px;
  font-size: 11.5px;
  color: var(--green);
  font-weight: 600;
  word-break: break-all;
}

.fields {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 12px;
}

.field span {
  font-family: 'Red Hat Display', sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.field input,
.field select {
  font: inherit;
  font-size: 13px;
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: #fff;
  color: var(--text-dark);
  min-width: 0;
  width: 100%;
}

.field input:focus,
.field select:focus {
  outline: 2px solid var(--green);
  outline-offset: 0;
  border-color: var(--green);
}

.field-group {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: 12px;
  margin-top: 4px;
}

.field-group legend {
  font-family: 'Red Hat Display', sans-serif;
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 0 6px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.grid-3 .field { min-width: 0; }
.grid-3 .field span {
  font-size: 9.5px;
  letter-spacing: 0.06em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.btn-primary, .btn-secondary, .btn-ghost {
  font: inherit;
  font-family: 'Red Hat Display', sans-serif;
  font-weight: 700;
  font-size: 12.5px;
  padding: 9px 14px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  letter-spacing: 0.02em;
}

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

.btn-primary:hover:not(:disabled) { background: var(--green-light); }

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

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

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border-color: var(--border);
}

.btn-ghost:hover:not(:disabled) { background: #f5f5f5; color: var(--text-dark); }

.btn-primary:disabled,
.btn-secondary:disabled,
.btn-ghost:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.status {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-muted);
  min-height: 16px;
}

.status.error { color: #b3261e; }
.status.ok { color: var(--green); }

.preview-frame-wrap {
  margin-top: 6px;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #e8ede9;
}

#preview {
  width: 100%;
  height: 80vh;
  border: 0;
  display: block;
  background: #e8ede9;
}