:root {
  --bg: #f6f7f9;
  --card-bg: #ffffff;
  --border: #dde1e6;
  --text: #1c2126;
  --muted: #6b7280;
  --accent: #2f5ce0;
  --accent-hover: #1f45b8;
  --danger: #b3261e;
  --danger-hover: #8f1e18;
  --success: #1a7f37;
}

* { box-sizing: border-box; }

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

.topbar {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 12px 24px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.brand { font-weight: 700; letter-spacing: 0.03em; }

.navlink {
  background: none;
  border: none;
  padding: 6px 10px;
  border-radius: 4px;
  cursor: pointer;
  color: var(--muted);
  font-size: 14px;
}
.navlink.active { color: var(--text); background: var(--bg); font-weight: 600; }
.navlink:disabled { opacity: 0.4; cursor: default; }

.topbar-status { margin-left: auto; font-size: 13px; color: var(--muted); }

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px;
}

.view[hidden] { display: none; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 20px 24px;
  margin-bottom: 16px;
}
.card.narrow { max-width: 480px; margin: 40px auto; }

h1 { font-size: 20px; margin: 0 0 4px; }
h2 { font-size: 15px; margin: 0 0 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

.muted { color: var(--muted); font-size: 13px; }
.error { color: var(--danger); font-size: 13px; min-height: 1em; }

label {
  display: block;
  margin-top: 14px;
  font-size: 13px;
  font-weight: 600;
}

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

.row { display: flex; gap: 10px; margin-top: 16px; }
.row-between { display: flex; align-items: center; justify-content: space-between; }

button {
  cursor: pointer;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 600;
  background: var(--card-bg);
  color: var(--text);
}
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { background: var(--accent-hover); }
button.secondary:hover { background: var(--bg); }
button.danger { background: #fff; border-color: var(--danger); color: var(--danger); }
button.danger:hover { background: var(--danger); color: #fff; }
button:disabled { opacity: 0.5; cursor: default; }

.project-list { display: flex; flex-direction: column; gap: 8px; margin-top: 16px; }
.project-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 4px;
  cursor: pointer;
  background: var(--bg);
}
.project-item:hover { border-color: var(--accent); }
.project-item .name { font-weight: 600; }
.project-item .sub { color: var(--muted); font-size: 12px; }

.workspace-header { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 12px; }
.meta-line { display: flex; gap: 20px; font-size: 13px; color: var(--muted); margin-top: 6px; }

.context-box {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 12px;
  font-size: 13px;
  max-height: 260px;
  overflow-y: auto;
}

.file-label { margin-top: 18px; }
.file-list { list-style: none; padding: 0; margin: 8px 0 0; font-size: 13px; color: var(--muted); }
.file-list li { padding: 2px 0; }

.send-result { margin-top: 16px; }

button.small { padding: 4px 10px; font-size: 12px; }

.compression-report {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
.compare-row { display: flex; align-items: center; gap: 16px; margin-bottom: 14px; }
.compare-side { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.compare-arrow { font-size: 20px; color: var(--muted); }
.compression-report .stat-grid { grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); }
.optimization-note { margin: 10px 0 0; font-style: italic; }

.output-header { align-items: flex-start; margin-top: 4px; }
.copy-confirm { display: block; color: var(--success); font-size: 12px; margin: 4px 0; }

.dash-header { margin-bottom: 16px; }

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 14px;
}
.stat-tile {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.stat-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
}
.stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
}

.machine-list { display: flex; flex-direction: column; gap: 10px; margin-top: 4px; }
.machine-card {
  padding: 14px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
}
.machine-card .row-between { margin-bottom: 8px; }
.machine-name { font-weight: 700; font-size: 14px; }
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.status-dot.online { background: var(--success); }
.status-dot.offline { background: var(--muted); }
.machine-stats { display: flex; flex-wrap: wrap; gap: 16px; font-size: 12px; color: var(--muted); }
.machine-stats strong { color: var(--text); }

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --card-bg: #1b1f26;
    --border: #2b3038;
    --text: #e6e8eb;
    --muted: #8b93a1;
    --accent: #5b7fe8;
    --accent-hover: #7592ec;
    --danger: #e5675f;
    --danger-hover: #ef8a83;
    --success: #3fb950;
  }
  button.primary { color: #0b0e12; }
  button.danger:hover { color: #0b0e12; }
}