:root {
  --brand: #1ba3e0;
  --brand-dark: #0f7fb0;
  --ink: #0f2a3d;
  --ink-soft: #526a7a;
  --bg: #f4f7fa;
  --panel: #ffffff;
  --border: #dfe6ed;
  --success: #1f9d55;
  --danger: #d64545;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(15, 42, 61, 0.08), 0 8px 24px rgba(15, 42, 61, 0.06);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* Element rule specificity beats the UA [hidden] { display: none } — restore it. */
[hidden] { display: none !important; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 14px 28px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
.brand img { height: 34px; display: block; }
.topbar__title {
  font-size: 15px;
  color: var(--ink-soft);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.topbar__user {
  font-size: 13px;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar__user .btn {
  padding: 6px 12px;
  font-size: 13px;
}

.page {
  flex: 1;
  padding: 40px 24px;
  max-width: 720px;
  width: 100%;
  margin: 0 auto;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 32px;
  box-shadow: var(--shadow);
}
.panel + .panel { margin-top: 24px; }
.panel h1 {
  margin: 0 0 12px;
  font-size: 22px;
  color: var(--ink);
}

.form { display: flex; flex-direction: column; gap: 20px; }
.form__group {
  border: 0;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form__group legend { font-weight: 600; margin-bottom: 6px; }
.form__group label { display: flex; align-items: center; gap: 8px; }
.form__group input[type="file"] {
  padding: 8px;
  border: 1px dashed var(--border);
  border-radius: 6px;
  background: #fafcfe;
}

.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--ink);
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 120ms ease, border-color 120ms ease;
}
.btn:hover { background: #f7fafd; }
.btn--primary {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand-dark);
}
.btn--primary:hover { background: var(--brand-dark); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

#status-line { color: var(--ink-soft); font-family: var(--mono); font-size: 13px; }

.progress {
  margin-top: 12px;
  height: 8px;
  background: #eaf1f6;
  border-radius: 999px;
  overflow: hidden;
}
.progress__bar {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--brand), var(--brand-dark));
  transition: width 300ms ease;
}

#download-slot { margin-top: 20px; }
#download-slot a {
  display: inline-block;
  background: var(--success);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  text-decoration: none;
}

.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--danger);
  color: #fff;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 14px;
  box-shadow: var(--shadow);
}

.footer {
  padding: 16px 24px;
  text-align: center;
  color: var(--ink-soft);
  font-size: 12px;
  border-top: 1px solid var(--border);
  background: #fff;
}