:root {
  --bg: var(--tg-theme-bg-color, #ffffff);
  --text: var(--tg-theme-text-color, #1c1c1e);
  --hint: var(--tg-theme-hint-color, #8e8e93);
  --field-bg: var(--tg-theme-secondary-bg-color, #f2f2f7);
  --accent: var(--tg-theme-button-color, #2481cc);
  --accent-text: var(--tg-theme-button-text-color, #ffffff);
  --danger: var(--tg-theme-destructive-text-color, #e53935);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

main { padding: 16px; max-width: 560px; margin: 0 auto; }

h1 { font-size: 20px; margin: 4px 0 16px; }

.field { display: block; margin-bottom: 14px; }
.field > span { display: block; font-size: 14px; color: var(--hint); margin-bottom: 6px; }
.req { color: var(--danger); font-weight: normal; }
.opt { font-style: normal; }

input, textarea {
  width: 100%;
  padding: 12px;
  border: 1.5px solid transparent;
  border-radius: 10px;
  background: var(--field-bg);
  color: var(--text);
  font: inherit;
  resize: vertical;
  outline: none;
}
input:focus, textarea:focus { border-color: var(--accent); }
.invalid input, .invalid textarea { border-color: var(--danger); }
.invalid .file-picker { border-color: var(--danger); }

.error { display: block; min-height: 1em; white-space: pre-line; margin-top: 4px; font-size: 13px; color: var(--danger); }

.file-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 8px; }
.file-list:empty { display: none; }
.file-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px;
  border-radius: 10px;
  background: var(--field-bg);
}
.file-thumb {
  flex: none;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  object-fit: cover;
  display: grid;
  place-items: center;
  font-size: 22px;
  background: var(--bg);
}
.file-meta { flex: 1; min-width: 0; font-size: 14px; }
.file-meta div { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-meta small { color: var(--hint); }
.file-remove {
  flex: none;
  width: 32px;
  padding: 6px 0;
  background: transparent;
  color: var(--hint);
  font-size: 18px;
}

.file-picker {
  display: block;
  position: relative;
  padding: 12px;
  border: 1.5px dashed var(--accent);
  border-radius: 10px;
  color: var(--accent);
  text-align: center;
  font-weight: 500;
  cursor: pointer;
}
.file-picker input { position: absolute; inset: 0; width: 100%; height: 100%; opacity: 0; cursor: pointer; }

button {
  width: 100%;
  padding: 14px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-text);
  font: inherit;
  font-weight: 600;
}
button:disabled { opacity: 0.6; }

#status { text-align: center; color: var(--hint); font-size: 14px; }
#status.err { color: var(--danger); }