:root {
  --primary: #1f4e5f;
  --primary-dark: #163945;
  --bg: #f4f6f7;
  --border: #d6dcde;
  --error: #b3261e;
  --success: #1e7a34;
  --text: #222;
}

* { box-sizing: border-box; }

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

.hidden { display: none !important; }

.screen { min-height: 100vh; }

/* Login */
.login-box {
  max-width: 360px;
  margin: 10vh auto;
  background: #fff;
  padding: 32px;
  border-radius: 10px;
  box-shadow: 0 2px 12px rgba(0,0,0,0.08);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.login-box h1 { font-size: 20px; margin: 0 0 2px; color: var(--primary-dark); }
.login-box .subtitle { margin: 0 0 16px; color: #777; font-size: 13px; }
.login-box label { font-size: 13px; font-weight: 600; margin-top: 8px; }
.login-box input {
  padding: 10px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
}
.login-box button {
  margin-top: 16px;
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 12px;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
}
.login-box button:hover { background: var(--primary-dark); }
.error { color: var(--error); font-size: 13px; }

/* App shell */
.app-header {
  background: var(--primary);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.app-header h1 { font-size: 18px; margin: 0; }
.link-btn {
  background: none; border: none; color: #fff; text-decoration: underline;
  cursor: pointer; font-size: 13px;
}

.doc-type-bar {
  background: #fff;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}
.doc-type-bar label { font-weight: 600; font-size: 14px; }
.doc-type-bar select {
  padding: 8px 12px; border: 1px solid var(--border); border-radius: 6px; font-size: 14px;
  min-width: 320px;
}

.app-main { max-width: 720px; margin: 24px auto; padding: 0 16px 80px; }

.form-fields { display: flex; flex-direction: column; gap: 14px; }

.field-row {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.field-row.hidden { display: none; }
.field-row label { font-size: 13px; font-weight: 600; color: #444; }
.field-row input, .field-row select {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
}
.field-row input[type="checkbox"] { width: 18px; height: 18px; align-self: flex-start; }
.field-preview { font-size: 12px; color: #6b7c80; font-style: italic; }

.action-bar {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.action-bar button {
  background: var(--primary);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 15px;
  cursor: pointer;
}
.action-bar button:disabled { background: #a9b7ba; cursor: not-allowed; }
.action-bar button:not(:disabled):hover { background: var(--primary-dark); }

.status { font-size: 14px; }
.status-error { color: var(--error); }
.status-success { color: var(--success); }
.status-info { color: #555; }