:root {
  --bg: #0f1115;
  --panel: #181b22;
  --border: #2a2f3a;
  --text: #e6e9ef;
  --muted: #8a93a6;
  --accent: #6ea8ff;
  --error: #ff6b6b;
  --ok: #5cd6a0;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

header {
  padding: 32px 24px 16px;
  border-bottom: 1px solid var(--border);
}

header h1 { margin: 0; font-size: 28px; }
header .sub { margin: 4px 0 0; color: var(--muted); font-size: 14px; }

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

section {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px;
}

details summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
}

label {
  display: block;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

input[type="text"],
input[type="password"],
select {
  width: 100%;
  padding: 8px 10px;
  margin-top: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 14px;
}

.hint { font-size: 12px; color: var(--muted); margin-top: 8px; }

.drop {
  position: relative;
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 40px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.drop.dragover { border-color: var(--accent); background: rgba(110, 168, 255, 0.05); }
.drop p { margin: 4px 0; color: var(--muted); font-size: 14px; }
.drop .filename { color: var(--text); font-size: 13px; }
.drop input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer;
}

button {
  margin-top: 16px;
  padding: 10px 20px;
  background: var(--accent);
  border: none;
  border-radius: 6px;
  color: #0a0d12;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  width: 100%;
}
button:disabled { opacity: 0.5; cursor: not-allowed; }

.result .meta {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 12px;
}

pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px;
  overflow-x: auto;
  font-size: 12px;
  line-height: 1.5;
  max-height: 500px;
}

.error {
  background: rgba(255, 107, 107, 0.08);
  border-color: var(--error);
  color: var(--error);
  font-size: 14px;
}

footer {
  text-align: center;
  padding: 24px;
  color: var(--muted);
}