:root {
  --bg: #0f1117;
  --panel: #171a23;
  --border: #2a2e3a;
  --text: #eef0f5;
  --muted: #8a8fa3;
  --accent: #7c5cff;
  --accent-hover: #6a49f2;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  padding: 40px 16px;
}

.app {
  width: 100%;
  max-width: 560px;
}

header { text-align: center; margin-bottom: 24px; }
header h1 {
  margin: 0 0 4px;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.logo-icon { width: 28px; height: 28px; color: var(--accent); flex-shrink: 0; }
.subtitle { margin: 0; color: var(--muted); font-size: 14px; }

.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
}

.tab {
  flex: 1;
  padding: 10px;
  background: transparent;
  border: none;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.tab.active { background: var(--accent); color: white; }

.panel { display: none; }
.panel.active { display: block; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.dropzone:hover, .dropzone.dragover {
  border-color: var(--accent);
  background: rgba(124, 92, 255, 0.06);
}

.dropzone p { margin: 4px 0; color: var(--muted); }
.link { color: var(--accent); text-decoration: underline; }
.filename { color: var(--text) !important; font-weight: 500; word-break: break-all; }

.settings {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin: 20px 0;
}

.settings label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: var(--muted);
}

.settings input {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--text);
  font-size: 14px;
}

.btn-convert {
  width: 100%;
  padding: 12px;
  background: var(--accent);
  border: none;
  border-radius: 10px;
  color: white;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}

.btn-convert:hover { background: var(--accent-hover); }
.btn-convert:disabled { opacity: 0.5; cursor: not-allowed; }

.result { margin-top: 28px; text-align: center; }
.result img { max-width: 100%; border-radius: 10px; border: 1px solid var(--border); }
.result.hidden { display: none; }

.btn-download {
  display: inline-block;
  margin-top: 12px;
  padding: 10px 20px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  text-decoration: none;
  font-size: 14px;
}

.status {
  margin-top: 16px;
  padding: 12px;
  border-radius: 8px;
  background: var(--panel);
  border: 1px solid var(--border);
  text-align: center;
  font-size: 14px;
  color: var(--muted);
}

.status.hidden { display: none; }
.status.error { color: #ff6b6b; border-color: #ff6b6b; }