:root {
  --ink: #212529;
  --mist: #6c757d;
  --paper: #f4f6f9;
  --panel: #ffffff;
  --line: #dee2e6;
  --bs-blue: #0d6efd;
  --bs-blue-hover: #0b5ed7;
  --bs-blue-active: #0a58ca;
  --bs-green: #198754;
  --bs-green-hover: #157347;
  --bs-green-active: #146c43;
  --bs-red: #dc3545;
  --bs-red-hover: #bb2d3b;
  --accent: var(--bs-blue);
  --accent-deep: var(--bs-blue-hover);
  --danger: var(--bs-red);
  --ok: var(--bs-green);
  --radius: 0.5rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --btn-shadow: 0 1px 2px rgba(16, 24, 40, 0.06);
  --focus-ring: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
  --focus-ring-success: 0 0 0 0.25rem rgba(25, 135, 84, 0.25);
  --focus-ring-danger: 0 0 0 0.25rem rgba(220, 53, 69, 0.25);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 480px at 90% -10%, rgba(13, 110, 253, 0.12), transparent 55%),
    linear-gradient(165deg, #eef3f8, #f7f9fb 50%, #e8eef5);
}
.shell {
  max-width: 880px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}
.top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-end;
  margin-bottom: 1.25rem;
}
.brand {
  margin: 0;
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}
.brand span { color: var(--bs-blue); }
.tag { margin: 0.25rem 0 0; color: var(--mist); font-size: 0.92rem; }
.path {
  margin: 0.4rem 0 0;
  font-size: 0.8rem;
  color: var(--mist);
  font-variant-numeric: tabular-nums;
}
.status {
  margin: 0;
  padding: 0.4rem 0.85rem;
  border-radius: 50rem;
  background: rgba(13, 110, 253, 0.1);
  color: var(--bs-blue-active);
  font-size: 0.875rem;
  font-weight: 600;
}
.status.ok { background: rgba(25, 135, 84, 0.12); color: var(--bs-green); }
.status.warn { background: rgba(220, 53, 69, 0.1); color: var(--bs-red); }

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.15rem 1.2rem 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.04);
}
.panel h2 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 600;
}
.hint {
  margin: 0 0 0.85rem;
  color: var(--mist);
  font-size: 0.9rem;
}
.grid2 {
  display: grid;
  gap: 1rem;
}
@media (min-width: 720px) {
  .grid2 { grid-template-columns: 1fr 1fr; }
}
.field {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  color: var(--mist);
  font-weight: 500;
}
.field input, .row input[type="file"] {
  width: 100%;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font: inherit;
  color: var(--ink);
  background: #fff;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus {
  outline: 0;
  border-color: #86b7fe;
  box-shadow: var(--focus-ring);
}
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  align-items: center;
  margin-bottom: 0.75rem;
}
.row.actions {
  gap: 0.75rem;
}
.row.actions input[type="file"] {
  flex: 1 1 220px;
  min-width: 0;
}

/* Bootstrap 5–style buttons */
.btn {
  --btn-bg: #fff;
  --btn-border: var(--line);
  --btn-color: var(--ink);
  --btn-hover-bg: #f8f9fa;
  --btn-hover-border: #c6c9cd;
  --btn-active-bg: #e9ecef;
  --btn-focus: var(--focus-ring);
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  border: 1px solid var(--btn-border);
  background: var(--btn-bg);
  color: var(--btn-color);
  border-radius: var(--radius);
  padding: 0.5rem 1rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
  box-shadow: var(--btn-shadow);
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}
.btn:hover:not(:disabled) {
  background: var(--btn-hover-bg);
  border-color: var(--btn-hover-border);
  color: var(--btn-color);
}
.btn:focus-visible {
  outline: 0;
  box-shadow: var(--btn-shadow), var(--btn-focus);
}
.btn:active:not(:disabled) {
  background: var(--btn-active-bg);
  border-color: var(--btn-hover-border);
}
.btn:disabled {
  opacity: 0.65;
  cursor: not-allowed;
  box-shadow: none;
  pointer-events: none;
}
.btn-lg {
  padding: 0.65rem 1.35rem;
  font-size: 1.125rem;
  border-radius: 0.5rem;
  font-weight: 600;
  min-height: 3rem;
}
.btn-ico {
  display: inline-flex;
  width: 1.25em;
  height: 1.25em;
  align-items: center;
  justify-content: center;
  font-size: 0.95em;
  font-weight: 700;
  line-height: 1;
}

.btn-primary {
  --btn-bg: var(--bs-blue);
  --btn-border: var(--bs-blue);
  --btn-color: #fff;
  --btn-hover-bg: var(--bs-blue-hover);
  --btn-hover-border: var(--bs-blue-hover);
  --btn-active-bg: var(--bs-blue-active);
  --btn-focus: var(--focus-ring);
}
.btn-success {
  --btn-bg: var(--bs-green);
  --btn-border: var(--bs-green);
  --btn-color: #fff;
  --btn-hover-bg: var(--bs-green-hover);
  --btn-hover-border: var(--bs-green-hover);
  --btn-active-bg: var(--bs-green-active);
  --btn-focus: var(--focus-ring-success);
}
.btn-outline-danger {
  --btn-bg: transparent;
  --btn-border: var(--bs-red);
  --btn-color: var(--bs-red);
  --btn-hover-bg: var(--bs-red);
  --btn-hover-border: var(--bs-red);
  --btn-active-bg: var(--bs-red-hover);
  --btn-focus: var(--focus-ring-danger);
}
.btn-outline-danger:hover:not(:disabled) {
  color: #fff;
}

.code-box { margin-top: 1rem; }
.code-box .label {
  display: block;
  font-size: 0.8rem;
  color: var(--mist);
  margin-bottom: 0.35rem;
  font-weight: 500;
}
.code {
  display: block;
  width: 100%;
  text-align: left;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 1.45rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.7rem 0.85rem;
  border-radius: var(--radius);
  border: 1px dashed #86b7fe;
  background: rgba(13, 110, 253, 0.06);
  color: var(--bs-blue-active);
  cursor: pointer;
  box-shadow: none;
}
.code:hover { background: rgba(13, 110, 253, 0.1); }
.hidden { display: none !important; }
.incoming {
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  background: rgba(25, 135, 84, 0.08);
  border: 1px solid rgba(25, 135, 84, 0.28);
  margin-bottom: 0.85rem;
}
.incoming-title {
  margin: 0 0 0.85rem;
  font-weight: 600;
  color: var(--ink);
}
.progress-wrap {
  height: 0.5rem;
  background: #e9ecef;
  border-radius: 50rem;
  overflow: hidden;
  margin: 0.5rem 0 0.35rem;
}
.progress-bar {
  height: 100%;
  background: var(--bs-blue);
  transition: width 0.15s ease;
}
.log {
  margin: 0.75rem 0 0;
  max-height: 180px;
  overflow: auto;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius);
  background: #212529;
  color: #dee2e6;
  font-size: 0.78rem;
  line-height: 1.45;
  white-space: pre-wrap;
  word-break: break-word;
}