:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1c2733;
  --muted: #5d6b7a;
  --accent: #2563eb;
  --accent-dark: #1d4ed8;
  --border: #dde3ea;
  --danger: #b91c1c;
  --ok: #15803d;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
}

/* Login */
.login-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}
.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  max-width: 22rem;
  width: 100%;
  text-align: center;
}
.login-card h1 { margin: 0 0 .5rem; }
.login-note { color: var(--muted); font-size: .85rem; }

/* Layout */
.topbar {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .75rem 1rem;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 1.15rem; }
.spacer { flex: 1; }
.user-email { color: var(--muted); font-size: .85rem; word-break: break-all; }

.tabs {
  display: flex;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
.tab {
  flex: 1;
  padding: .8rem 0;
  border: none;
  background: none;
  font-size: 1rem;
  color: var(--muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
}
.tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 600; }

main { max-width: 40rem; margin: 0 auto; padding: 1rem; }
.panel { padding-top: .25rem; }
.hidden { display: none !important; }

/* Buttons */
.btn {
  display: inline-block;
  padding: .7rem 1.1rem;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text);
  font-size: 1rem;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:active { background: var(--accent-dark); }
.btn-primary:disabled { opacity: .6; cursor: wait; }
.btn-google { background: var(--accent); border-color: var(--accent); color: #fff; width: 100%; }
.btn-ghost { padding: .4rem .8rem; font-size: .85rem; }

/* Forms */
form label { display: block; margin: 1rem 0 .35rem; font-weight: 600; font-size: .9rem; }
form select, form input {
  width: 100%;
  padding: .65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  background: var(--card);
}
form .btn { margin-top: 1.25rem; width: 100%; }

.status { padding: .75rem; border-radius: 8px; font-size: .95rem; }
.status.ok { background: #dcfce7; color: var(--ok); }
.status.err { background: #fee2e2; color: var(--danger); }

/* Browse / search lists */
.breadcrumb { margin: .25rem 0 1rem; font-size: .95rem; display: flex; flex-wrap: wrap; gap: .25rem; align-items: center; }
.breadcrumb button {
  border: none; background: none; color: var(--accent);
  cursor: pointer; font-size: .95rem; padding: .25rem;
}
.breadcrumb .sep { color: var(--muted); }
.breadcrumb .current { font-weight: 600; padding: .25rem; }

.list { display: flex; flex-direction: column; gap: .5rem; }
.row {
  display: flex;
  align-items: center;
  gap: .75rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .8rem 1rem;
}
.row .icon { font-size: 1.2rem; flex-shrink: 0; }
.row .info { flex: 1; min-width: 0; }
.row .name { font-weight: 600; word-break: break-all; }
.row .meta { color: var(--muted); font-size: .8rem; word-break: break-all; }
.row.dir { cursor: pointer; }
.row.dir:hover { border-color: var(--accent); }
.row .btn { padding: .45rem .8rem; font-size: .85rem; flex-shrink: 0; }

.search-row { display: flex; gap: .5rem; margin-bottom: 1rem; }
.search-row input { flex: 1; }
.search-row .btn { width: auto; margin: 0; }

.empty { color: var(--muted); text-align: center; padding: 1.5rem 0; }

@media (max-width: 480px) {
  .user-email { display: none; }
}