:root {
  --bg: #eef3f7;
  --panel: #ffffff;
  --ink: #1a2b3c;
  --muted: #6b7c8a;
  --line: #d7e0e8;
  --brand: #0f4c6e;
  --brand-2: #1f7a8c;
  --accent: #c45c26;
  --danger: #b42318;
  --ok: #067647;
  --shadow: 0 10px 30px rgba(15, 45, 70, 0.08);
  --radius: 14px;
  --font: "Segoe UI", "Candara", "Trebuchet MS", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(1200px 500px at 10% -10%, #d9ebf5 0%, transparent 60%),
    radial-gradient(900px 400px at 100% 0%, #f7e8dc 0%, transparent 55%),
    var(--bg);
}
a { color: var(--brand); text-decoration: none; }
[x-cloak] { display: none !important; }

.topbar {
  display: flex; align-items: center; gap: 1rem;
  padding: .75rem 1.25rem;
  background: rgba(255,255,255,.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(8px);
  position: sticky; top: 0; z-index: 20;
}
.brand { display: flex; align-items: center; gap: .7rem; min-width: 180px; }
.brand-sub { display: block; font-size: .75rem; color: var(--muted); }
.topnav { display: flex; gap: .35rem; flex: 1; }
.topnav a {
  padding: .45rem .8rem; border-radius: 999px; color: var(--ink); font-weight: 600; font-size: .92rem;
}
.topnav a.active, .topnav a:hover { background: #e7f1f6; color: var(--brand); }
.userbox { display: flex; align-items: center; gap: .6rem; color: var(--muted); font-size: .9rem; }
.userbox em { font-style: normal; color: var(--brand-2); }

.page { padding: 1rem; }
.explorer {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr) 280px;
  gap: .85rem;
  min-height: calc(100vh - 90px);
}
.pane {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex; flex-direction: column; overflow: hidden;
}
.pane-head, .pane-foot, .status-bar {
  padding: .7rem .9rem;
  border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; align-items: center; gap: .5rem;
  background: linear-gradient(180deg, #f8fbfd, #f2f6f9);
  font-size: .92rem;
}
.pane-foot, .status-bar { border-bottom: 0; border-top: 1px solid var(--line); color: var(--muted); }
.tree { padding: .5rem; overflow: auto; }
.tree-type summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between;
  padding: .55rem .65rem; border-radius: 10px; font-weight: 700;
}
.tree-type summary::-webkit-details-marker { display: none; }
.tree-type summary:hover { background: #eef5f9; }
.tree-type ul { list-style: none; margin: .15rem 0 .5rem; padding: 0 0 0 .5rem; }
.tree-type a {
  display: flex; justify-content: space-between; padding: .4rem .65rem; border-radius: 8px; color: var(--ink);
}
.tree-type a.active, .tree-type a:hover { background: #e4f0f6; color: var(--brand); }
.tree em { color: var(--muted); font-style: normal; font-size: .8rem; }

.table-wrap { overflow: auto; flex: 1; }
.data-table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.data-table th, .data-table td { padding: .55rem .65rem; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.data-table th { position: sticky; top: 0; background: #edf3f7; z-index: 1; }
.data-table tr { cursor: pointer; }
.data-table tr.selected, .data-table tr:hover { background: #eef7fb; }
.center { text-align: center !important; }

.preview-pane { padding-bottom: .5rem; }
.preview-meta { padding: .85rem; display: grid; gap: .55rem; }
.preview-meta h3 { margin: 0; font-size: 1rem; }
.thumbs {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: .55rem;
  padding: 0 .75rem .75rem; overflow: auto;
}
.thumb {
  display: grid; gap: .25rem; justify-items: center; color: var(--muted); font-size: .75rem;
  border: 1px solid var(--line); border-radius: 10px; padding: .35rem; background: #fafcfd;
}
.thumb img { width: 100%; aspect-ratio: 3/4; object-fit: cover; border-radius: 6px; background: #dde5eb; }
.thumb:hover { border-color: var(--brand-2); }

.btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 10px; padding: .55rem .9rem; font-weight: 600; cursor: pointer;
}
.btn-primary { background: linear-gradient(180deg, var(--brand-2), var(--brand)); color: #fff; border-color: transparent; }
.btn-danger { background: var(--danger); color: #fff; border-color: transparent; }
.btn-ghost { background: transparent; }
.btn-sm { padding: .35rem .65rem; font-size: .82rem; }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.inline { display: inline; }
.inline-form { display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; }

.auth-body {
  min-height: 100vh; display: grid; place-items: center; padding: 1rem;
  background:
    linear-gradient(145deg, rgba(15,76,110,.92), rgba(31,122,140,.85)),
    radial-gradient(circle at 20% 20%, #f7e8dc, transparent 40%);
}
.auth-card {
  width: min(420px, 100%); background: #fff; border-radius: 18px; padding: 1.6rem;
  box-shadow: var(--shadow); display: grid; gap: .8rem;
}
.auth-logo { width: 64px; height: 64px; margin: 0 auto; }
.auth-card h1 { margin: 0; text-align: center; }
.stack { display: grid; gap: .75rem; }
label { display: grid; gap: .35rem; font-size: .9rem; font-weight: 600; }
input, select, textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px; padding: .6rem .7rem;
  font: inherit; background: #fff;
}
.muted { color: var(--muted); }
.alert { padding: .7rem .85rem; border-radius: 10px; font-size: .9rem; }
.alert-error { background: #fef3f2; color: var(--danger); border: 1px solid #fecdca; }
.alert-ok { background: #ecfdf3; color: var(--ok); border: 1px solid #abe6c3; }

.content-narrow, .content-wide { width: min(980px, 100%); margin: 0 auto; display: grid; gap: 1rem; }
.content-wide { width: min(1200px, 100%); }
.section-head h1 { margin: 0 0 .25rem; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1rem;
}
.form-grid {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .85rem;
}
.form-grid .full { grid-column: 1 / -1; }
.actions { display: flex; gap: .6rem; align-items: center; }
.progress-box .progress {
  height: 10px; background: #e7eef3; border-radius: 999px; overflow: hidden; margin-bottom: .4rem;
}
.progress-box .bar { height: 100%; background: linear-gradient(90deg, var(--brand-2), var(--accent)); }
.check { display: flex; align-items: center; gap: .35rem; font-weight: 500; }

@media (max-width: 1100px) {
  .explorer { grid-template-columns: 220px minmax(0,1fr); }
  .preview-pane { display: none; }
}
@media (max-width: 800px) {
  .explorer { grid-template-columns: 1fr; min-height: auto; }
  .topbar { flex-wrap: wrap; }
  .form-grid { grid-template-columns: 1fr; }
}