:root {
  --bg: #f7f4f0;
  --panel: #ffffff;
  --text: #1d1b1a;
  --accent: #2b6f65;
  --border: #e5e0d8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Iowan Old Style", "Garamond", "Times New Roman", serif;
  color: var(--text);
  background: linear-gradient(135deg, #f7f4f0, #efe9e1);
}

.page {
  max-width: 980px;
  margin: 0 auto;
  padding: 40px 20px 60px;
}

.hero {
  text-align: center;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: 2.4rem;
  margin: 0 0 8px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
}

.form {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 6px;
  font-size: 0.95rem;
}

.row {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

input[type="text"],
input[type="number"],
input[type="file"] {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  font-size: 1rem;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px 18px;
  border-radius: 12px;
  font-size: 1rem;
  cursor: pointer;
}

button:hover {
  opacity: 0.92;
}

.viewer {
  width: 100%;
  height: 520px;
  background: #fafafa;
  border-radius: 12px;
}

.error {
  color: #9a2c2c;
  font-weight: 600;
}

@media (max-width: 640px) {
  .viewer {
    height: 360px;
  }
}