:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --border: #e2e5ea;
  --text: #1c2128;
  --text-muted: #667085;
  --brand: #2f6fed;
  --brand-dark: #1f4fb8;
  --ok: #1a8f5e;
  --ok-bg: #e7f7ef;
  --warn: #b7791f;
  --warn-bg: #fff6e5;
  --err: #c0362c;
  --err-bg: #fdeceb;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.04), 0 1px 3px rgba(16, 24, 40, 0.06);
}

* { box-sizing: border-box; }

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

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.topbar-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 20px;
  height: 56px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.brand span { color: var(--brand); }
.topnav { display: flex; gap: 16px; flex: 1; }
.topnav a { color: var(--text-muted); font-weight: 500; padding: 6px 0; border-bottom: 2px solid transparent; }
.topnav a.active { color: var(--text); border-color: var(--brand); }
.logout-form { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.who { color: var(--text-muted); font-size: 0.9rem; }
.link-btn {
  background: none; border: none; color: var(--text-muted); cursor: pointer;
  font-size: 0.9rem; padding: 0;
}
.link-btn:hover { color: var(--text); text-decoration: underline; }

.page {
  max-width: 1080px;
  margin: 0 auto;
  padding: 28px 20px 60px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.page-header h1 { margin: 0 0 4px; font-size: 1.5rem; }
.page-header p { margin: 0; color: var(--text-muted); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}
.btn:hover { text-decoration: none; border-color: #c8ccd4; }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); border-color: var(--brand-dark); }
.btn-danger { color: var(--err); }
.btn-danger:hover { border-color: var(--err); }
.btn-sm { padding: 5px 10px; font-size: 0.82rem; }
.btn[disabled] { opacity: 0.5; cursor: not-allowed; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card + .card { margin-top: 16px; }

.list-table { width: 100%; border-collapse: collapse; }
.list-table th, .list-table td {
  text-align: left; padding: 12px 10px; border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
}
.list-table th { color: var(--text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; }
.list-table tbody tr:hover { background: #fafbfc; }
.table-wrap { overflow-x: auto; }

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px; border-radius: 999px; font-size: 0.78rem; font-weight: 600;
}
.badge-pending { background: #eef1f5; color: var(--text-muted); }
.badge-building { background: var(--warn-bg); color: var(--warn); }
.badge-ready { background: var(--ok-bg); color: var(--ok); }
.badge-installed { background: var(--ok-bg); color: var(--ok); }
.badge-failed { background: var(--err-bg); color: var(--err); }
.badge-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.empty-state {
  text-align: center; padding: 48px 20px; color: var(--text-muted);
}
.empty-state h3 { color: var(--text); margin-bottom: 6px; }

.messages { list-style: none; padding: 0; margin: 0 0 20px; display: flex; flex-direction: column; gap: 8px; }
.message { padding: 10px 14px; border-radius: 8px; font-size: 0.9rem; }
.message-success { background: var(--ok-bg); color: var(--ok); }
.message-error { background: var(--err-bg); color: var(--err); }
.message-info { background: #eef2fb; color: var(--brand-dark); }
.message-warning { background: var(--warn-bg); color: var(--warn); }

form .field { margin-bottom: 16px; }
form label { display: block; font-weight: 600; font-size: 0.88rem; margin-bottom: 6px; }
form input[type="text"], form input[type="password"], form input[type="email"] {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px;
  font-size: 0.95rem; background: var(--surface); color: var(--text);
}
form input:focus { outline: 2px solid var(--brand); outline-offset: 1px; }
.help-text { color: var(--text-muted); font-size: 0.82rem; margin-top: 4px; }
.errorlist { list-style: none; padding: 0; margin: 6px 0 0; color: var(--err); font-size: 0.85rem; }

.dropzone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 36px 20px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.dropzone.dragover { border-color: var(--brand); background: #f3f7ff; }
.dropzone h3 { margin: 8px 0 4px; font-size: 1rem; }
.dropzone p { margin: 0; color: var(--text-muted); font-size: 0.88rem; }
.dropzone .or { margin: 10px 0; color: var(--text-muted); font-size: 0.82rem; }
.dropzone-actions { display: flex; gap: 10px; justify-content: center; margin-top: 6px; flex-wrap: wrap; }

.file-list {
  list-style: none; padding: 0; margin: 14px 0 0;
  max-height: 220px; overflow-y: auto;
  border: 1px solid var(--border); border-radius: 8px;
}
.file-list li {
  padding: 8px 12px; font-size: 0.85rem; border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; gap: 10px; color: var(--text-muted);
}
.file-list li:last-child { border-bottom: none; }
.file-list .fname { color: var(--text); font-family: ui-monospace, monospace; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; margin: 16px 0; }
.stat { padding: 14px 16px; border: 1px solid var(--border); border-radius: 8px; background: #fafbfc; }
.stat .value { font-size: 1.4rem; font-weight: 700; }
.stat .label { color: var(--text-muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.03em; }

.section-title { font-size: 1rem; font-weight: 700; margin: 0 0 12px; }
.pack-details > summary.section-title { cursor: pointer; margin-bottom: 0; list-style: none; }
.pack-details > summary.section-title::-webkit-details-marker { display: none; }
.pack-details > summary.section-title::before { content: "▸ "; display: inline-block; transition: transform 0.15s; }
.pack-details[open] > summary.section-title::before { transform: rotate(90deg); }
.pack-details[open] > summary.section-title { margin-bottom: 12px; }
.pack-details .stat-grid { margin-bottom: 16px; }
.mono { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.85rem; word-break: break-all; }
.diag-list { list-style: none; padding: 0; margin: 0; }
.diag-list li { padding: 8px 0; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
.diag-list li:last-child { border-bottom: none; }
.diag-sev { font-weight: 700; text-transform: uppercase; font-size: 0.72rem; margin-right: 8px; }
.diag-error .diag-sev { color: var(--err); }
.diag-warning .diag-sev { color: var(--warn); }
.diag-info .diag-sev { color: var(--text-muted); }

.error-box {
  background: var(--err-bg); border: 1px solid #f3c6c1; color: var(--err);
  border-radius: 8px; padding: 14px 16px; white-space: pre-wrap; font-size: 0.88rem;
}

.device-check {
  display: flex; align-items: center; gap: 10px; padding: 8px 0; border-bottom: 1px solid var(--border);
}
.device-check:last-child { border-bottom: none; }

.inline-form { display: inline; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.manifest-url { display: flex; gap: 8px; align-items: center; }
.manifest-url input { flex: 1; font-family: ui-monospace, monospace; font-size: 0.82rem; }

.login-wrap { max-width: 380px; margin: 90px auto; }
.login-wrap .brand { display: block; text-align: center; margin-bottom: 20px; font-size: 1.2rem; }

@media (max-width: 600px) {
  .topbar-inner { flex-wrap: wrap; height: auto; padding: 10px 16px; }
  .who { display: none; }
}