:root {
  --bg: #f4f6f8;
  --card: #ffffff;
  --ink: #1a1a1a;
  --muted: #5b6470;
  --accent: #1f5eff;
  --error: #c0392b;
  --border: #d7dce2;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

.bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

.brand {
  font-weight: 700;
}

.user {
  color: var(--muted);
  margin-left: auto;
}

main {
  max-width: 720px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 16px;
}

h1 {
  font-size: 1.3rem;
  margin: 0 0 12px;
}

h2 {
  font-size: 1.1rem;
  margin: 20px 0 8px;
}

label {
  display: block;
  margin-bottom: 12px;
}

input {
  width: 100%;
  padding: 8px 10px;
  margin-top: 4px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
}

button {
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: #fff;
  font-size: 1rem;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

button.ghost {
  background: transparent;
}

.actions {
  margin-top: 12px;
  display: flex;
  gap: 8px;
}

.hint {
  color: var(--muted);
  margin-top: 0;
}

.error {
  color: var(--error);
  min-height: 1.2em;
}

.status {
  font-size: 1.05rem;
}

.file-list,
.downloads {
  margin: 12px 0;
  padding-left: 20px;
}

.downloads a {
  color: var(--accent);
}