* {
  box-sizing: border-box;
}

:root {
  --green: #08743d;
  --lime: #8bc62a;
  --blue: #087db8;
  --dark: #17211b;
  --muted: #64736a;
  --border: #dfe6e1;
  --bg: #f5f7f6;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--dark);
  background: var(--bg);
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 32px 20px 24px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin-bottom: 24px;
}

.page-header h1 {
  margin: 0 0 8px;
  font-size: 30px;
}

.page-header p {
  margin: 0;
  color: var(--muted);
}

.header-logo {
  display: block;
  width: 190px;
  height: auto;
}

.workspace {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 22px;
}

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 5px 20px rgba(0,0,0,.04);
}

.card h2 {
  margin: 0 0 20px;
  font-size: 19px;
}

label {
  display: block;
  margin: 0 0 7px;
  font-size: 14px;
  font-weight: 700;
}

input {
  width: 100%;
  margin-bottom: 15px;
  padding: 12px 13px;
  border: 1px solid #cbd6cf;
  border-radius: 8px;
  font: inherit;
  outline: none;
}

input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(8,125,184,.12);
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 5px;
}

button {
  border: 0;
  border-radius: 8px;
  padding: 12px 15px;
  font-weight: 700;
  cursor: pointer;
}

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

.secondary {
  background: #e9efeb;
  color: var(--dark);
}

.status {
  min-height: 20px;
  margin: 12px 0 0;
  color: var(--green);
  font-size: 13px;
}

.preview-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.preview-title span {
  color: var(--muted);
  font-size: 12px;
}

.preview-box {
  min-height: 390px;
  display: flex;
  align-items: center;
  padding: 28px;
  margin-top: 8px;
  border: 1px dashed #cdd8d1;
  border-radius: 10px;
  background: #fff;
  overflow-x: auto;
}

#signaturePreview {
  width: 100%;
}

details {
  margin-top: 20px;
  color: #435148;
  font-size: 14px;
}

summary {
  cursor: pointer;
  font-weight: 700;
}

footer {
  margin-top: 18px;
  color: #7a877f;
  font-size: 12px;
  text-align: center;
}

@media (max-width: 850px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .page-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .header-logo {
    width: 170px;
  }
}