:root {
  --bg: #0f1720;
  --panel: #17212c;
  --panel-border: #263241;
  --text: #e8edf2;
  --muted: #93a4b5;
  --accent: #3ba55d;
  --accent-hover: #2f8a4c;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

header {
  padding: 32px 24px 16px;
  max-width: 960px;
  margin: 0 auto;
}

h1 { margin: 0 0 4px; font-size: 1.6rem; }
.subtitle { color: var(--muted); margin: 0; }

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px 48px;
  color: var(--muted);
  font-size: 0.8rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 24px;
}

.field { margin-bottom: 16px; display: flex; flex-direction: column; gap: 6px; }
.field-row { display: flex; gap: 24px; flex-wrap: wrap; }
.field-row .field { flex: 1; min-width: 180px; }

label { font-weight: 600; font-size: 0.9rem; }
.hint { color: var(--muted); font-size: 0.8rem; margin: 0; }

input[type="file"],
select {
  background: #0f1720;
  border: 1px solid var(--panel-border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
}

input[type="range"] { accent-color: var(--accent); }

.checkbox-field label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

.watermark-fieldset {
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  padding: 16px;
  margin: 8px 0 0;
}
.watermark-fieldset legend { padding: 0 6px; font-weight: 600; }

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 12px 20px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease;
}
button:hover { background: var(--accent-hover); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

#status-message { color: var(--muted); min-height: 1.2em; margin-top: 12px; }
#status-message.error { color: #e26060; }

#progress-bar-wrap {
  height: 6px;
  background: #0f1720;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 8px;
}
#progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.2s ease;
}

.results-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.results-header button { padding: 8px 16px; font-size: 0.9rem; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.result-card {
  background: #0f1720;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  overflow: hidden;
}

.result-card img {
  width: 100%;
  display: block;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  background: #060a0e;
}

.result-card .caption {
  padding: 8px 10px;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.result-card .caption a { color: var(--accent); text-decoration: none; font-weight: 600; }

.error-list {
  color: #e2a060;
  font-size: 0.85rem;
  margin-top: 12px;
  white-space: pre-line;
}