:root {
  --bg: #f5f5f5;
  --card-bg: #ffffff;
  --text: #242424;
  --muted-text: #666666;
  --label-text: #444444;
  --border: #e1e1e1;
  --border-light: #d6d6d6;
  --input-bg: #ffffff;
  --input-text: #242424;
  --button-bg: #edebe9;
  --button-bg-hover: #e1dfdd;
  --button-text: #242424;
  --primary: #de2923;
  --primary-hover: #b71f1a;
  --primary-text: #ffffff;
  --error: #b10e1e;
  --success: #0f7b0f;
  --preview-border: #d6d6d6;
  --banner-preview-border: #eeeeee;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
}

/* Teams / hostitel v tmavém režimu (viz watchColorScheme() v signature-core.js) */
body.theme-dark {
  --bg: #141414;
  --card-bg: #232323;
  --text: #f3f2f1;
  --muted-text: #c8c6c4;
  --label-text: #d2d0ce;
  --border: #383838;
  --border-light: #484644;
  --input-bg: #2d2c2b;
  --input-text: #f3f2f1;
  --button-bg: #3b3a39;
  --button-bg-hover: #484644;
  --button-text: #f3f2f1;
  --primary: #e5544e;
  --primary-hover: #ef7a75;
  --primary-text: #1f1f1f;
  --error: #f1707b;
  --success: #92c353;
  --preview-border: #484644;
  --banner-preview-border: #3b3a39;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
}

/* Vysoký kontrast */
body.theme-contrast {
  --bg: #000000;
  --card-bg: #000000;
  --text: #ffffff;
  --muted-text: #ffff00;
  --label-text: #ffffff;
  --border: #ffffff;
  --border-light: #ffffff;
  --input-bg: #000000;
  --input-text: #ffffff;
  --button-bg: #000000;
  --button-bg-hover: #ffff00;
  --button-text: #ffffff;
  --primary: #ffff00;
  --primary-hover: #ffff00;
  --primary-text: #000000;
  --error: #ff6666;
  --success: #66ff66;
  --preview-border: #ffffff;
  --banner-preview-border: #ffffff;
  --shadow: none;
}

* { box-sizing: border-box; }

body {
  font-family: "Segoe UI", Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  transition: background 0.15s ease, color 0.15s ease;
}

#app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 28px 32px 60px;
}

#app-header { margin-bottom: 24px; }
h1 { font-size: 22px; margin: 0 0 4px; font-weight: 600; }
h2 { font-size: 15px; margin: 0 0 14px; font-weight: 600; }
.hidden { display: none !important; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow);
  padding: 20px 22px;
  margin-bottom: 0px;
}
.card-narrow { max-width: 420px; }

/* --- Mřížka: dva sloupce nahoře, náhled podpisu přes celou šířku dole --- */
.layout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 20px;
  row-gap: 20px;
  align-items: start;
}
.card-full { grid-column: 1 / -1; }

@media (max-width: 820px) {
  .layout-grid { grid-template-columns: 1fr; }
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0 16px;
}
.field-grid .span-2 { grid-column: 1 / -1; }

label {
  display: block;
  margin-bottom: 12px;
  font-size: 12.5px;
  color: var(--label-text);
}
input[type="text"], select, textarea {
  width: 100%;
  margin-top: 4px;
  padding: 8px 10px;
  border: 1px solid var(--border-light);
  border-radius: 6px;
  font-size: 14px;
  font-family: inherit;
  background: var(--input-bg);
  color: var(--input-text);
}
input[type="text"]:focus, select:focus, textarea:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}
textarea { font-family: Consolas, monospace; font-size: 11px; resize: vertical; }

button, .button-link {
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  font-size: 14px;
  cursor: pointer;
  background: var(--button-bg);
  color: var(--button-text);
  margin: 4px 4px 4px 0;
}
.button-link {
  display: inline-block;
  text-decoration: none;
}
button.primary, .button-link.primary {
  background: var(--primary);
  color: var(--primary-text);
  font-weight: 600;
}
button.primary:hover, .button-link.primary:hover { background: var(--primary-hover); }
button:hover, .button-link:hover { background: var(--button-bg-hover); }

.error { color: var(--error); font-size: 12.5px; }
.status { color: var(--success); font-size: 12.5px; min-height: 16px; margin: 0; }
.copy-row { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 12px; }
.hint { color: var(--muted-text); font-size: 12px; }

#signature-preview {
  border: 1px dashed var(--preview-border);
  border-radius: 8px;
  padding: 14px;
  min-height: 80px;
  margin-bottom: 12px;
  /* Vždy světlé pozadí bez ohledu na motiv aplikace — podpis se
     bude zobrazovat v e-mailu, který má typicky bílé pozadí, takže
     náhled má ukazovat realitu, ne motiv hostitele. */
  background: #ffffff;
  color: #242424;
}

/* --- Přihlášení pro návštěvu mimo Teams / Outlook (vzhled přihlášení do administrace) --- */
#login-section {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0 16px;
  border-top: 4px solid #e2001a;
  background: #f4f6f7;
  color: #1d1d1b;
  font-family: "Public Sans", ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
.login-card {
  width: 100%;
  max-width: 384px;
  padding: 32px;
  text-align: center;
  background: #ffffff;
  border: 1px solid #dde2e6;
  border-radius: 12px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}
.login-logo { display: block; height: 36px; margin: 0 auto; }
.login-card h1 {
  margin: 24px 0 0;
  font-family: "Archivo", ui-sans-serif, system-ui, sans-serif;
  font-size: 24px;
  line-height: 32px;
  font-weight: 600;
  letter-spacing: -0.025em;
}
.login-card p { margin: 4px 0 0; font-size: 14px; line-height: 20px; color: #5b6770; }
.login-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  margin-top: 32px;
  padding: 10px 16px;
  border-radius: 6px;
  background: #e2001a;
  color: #ffffff;
  font-size: 14px;
  line-height: 20px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
  transition: background-color 0.15s ease;
}
.login-button:hover { background: #b80016; }
.login-button:focus-visible { outline: 2px solid #e2001a; outline-offset: 2px; }
.login-button img { height: 20px; }