:root {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-2: #1f232c;
  --border: #2a2f3a;
  --text: #e6e8ee;
  --muted: #9aa3b2;
  --accent: #4f8cff;
  --accent-2: #6aa4ff;
  --danger: #ff5a5a;
  --ok: #41d49b;
  --warn: #ffb84d;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Malgun Gothic", Roboto, sans-serif; font-size: 14px; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); text-decoration: underline; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px; }
.wide { max-width: 1400px; }

header.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header.topbar .brand { font-weight: 700; font-size: 16px; letter-spacing: 0.3px; }
header.topbar nav a { margin-left: 16px; color: var(--muted); }
header.topbar nav a.active, header.topbar nav a:hover { color: var(--text); text-decoration: none; }
header.topbar .user { color: var(--muted); font-size: 13px; }
header.topbar .user a { margin-left: 12px; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 17px; margin: 24px 0 12px; }

.card { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 20px; }
.card + .card { margin-top: 16px; }

.btn { display: inline-block; padding: 8px 16px; border-radius: 6px; border: 1px solid var(--border); background: var(--panel-2); color: var(--text); cursor: pointer; font-size: 14px; font-family: inherit; }
.btn:hover { background: #2a2f3a; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-2); border-color: var(--accent-2); }
.btn.danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn.danger:hover { background: var(--danger); color: #fff; }
.btn.small { padding: 5px 10px; font-size: 12px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

input[type=text], input[type=password], input[type=number], input[type=color], textarea, select {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 6px;
  padding: 8px 10px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
}
textarea { min-height: 80px; resize: vertical; }
input:focus, textarea:focus, select:focus { outline: none; border-color: var(--accent); }

.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-size: 12px; color: var(--muted); margin-bottom: 6px; }
.form-inline { display: flex; gap: 8px; align-items: center; }

.flash { padding: 10px 14px; border-radius: 6px; margin-bottom: 16px; }
.flash.ok { background: rgba(65, 212, 155, 0.12); border: 1px solid rgba(65, 212, 155, 0.4); color: var(--ok); }
.flash.err { background: rgba(255, 90, 90, 0.12); border: 1px solid rgba(255, 90, 90, 0.4); color: var(--danger); }

table.data { width: 100%; border-collapse: collapse; }
table.data th, table.data td { padding: 10px 12px; border-bottom: 1px solid var(--border); text-align: left; }
table.data th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }
table.data tr:hover td { background: rgba(255,255,255,0.02); }
.muted { color: var(--muted); }
.right { text-align: right; }

.layer-row { display: flex; align-items: center; gap: 10px; padding: 10px; border: 1px solid var(--border); border-radius: 6px; background: var(--panel-2); margin-bottom: 8px; }
.layer-row.dragging { opacity: 0.5; }
.layer-row .drag { cursor: grab; color: var(--muted); padding: 0 6px; user-select: none; }
.layer-row .thumb { width: 48px; height: 48px; background: #000; border: 1px solid var(--border); border-radius: 4px; display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: 10px; overflow: hidden; flex-shrink: 0; }
.layer-row .thumb img { max-width: 100%; max-height: 100%; }
.layer-row .info { flex: 1; min-width: 0; }
.layer-row .info .name { font-weight: 500; }
.layer-row .info .meta { color: var(--muted); font-size: 12px; }
.layer-row .controls { display: flex; gap: 6px; align-items: center; }

.viewer-layout { display: grid; grid-template-columns: 280px 1fr; gap: 16px; height: calc(100vh - 80px); }
.viewer-sidebar { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 16px; overflow-y: auto; }
.viewer-stage { background: #000; border: 1px solid var(--border); border-radius: 8px; position: relative; overflow: hidden; }
.viewer-stage canvas { position: absolute; top: 0; left: 0; transform-origin: 0 0; }
.viewer-toolbar { position: absolute; top: 10px; right: 10px; display: flex; gap: 6px; z-index: 10; background: rgba(23, 26, 33, 0.85); padding: 6px; border-radius: 6px; border: 1px solid var(--border); }
.viewer-stage.loading::after { content: '로딩 중...'; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--muted); z-index: 5; }

.layer-control { padding: 10px; border: 1px solid var(--border); border-radius: 6px; margin-bottom: 8px; background: var(--panel-2); }
.layer-control .header { display: flex; align-items: center; gap: 8px; }
.layer-control .header label { display: flex; align-items: center; gap: 8px; flex: 1; cursor: pointer; font-weight: 500; }
.layer-control .opacity { margin-top: 8px; display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }
.layer-control input[type=range] { flex: 1; }

.login-box { max-width: 360px; margin: 80px auto; }
.login-box h1 { text-align: center; }

/* ---------- Admin layout editor ---------- */
.editor-stage {
  position: relative;
  height: 60vh;
  min-height: 360px;
  background: #000;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  user-select: none;
  cursor: grab;
}
.editor-stage:active { cursor: grabbing; }
.editor-viewport {
  position: absolute;
  top: 0; left: 0;
  transform-origin: 0 0;
}
.editor-composite { display: block; }
.editor-selection {
  position: absolute;
  box-sizing: border-box;
  border: 1px dashed var(--accent);
  outline: 1px solid rgba(0,0,0,0.6); /* contrast on light areas */
  cursor: move;
  pointer-events: auto;
}
.editor-selection .handle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: var(--accent);
  border: 1px solid #fff;
  /* keep handles screen-sized regardless of viewport scale */
  transform-origin: center;
}
.editor-selection .handle.n  { top: -6px; left: 50%; margin-left: -5px; cursor: ns-resize; }
.editor-selection .handle.s  { bottom: -6px; left: 50%; margin-left: -5px; cursor: ns-resize; }
.editor-selection .handle.w  { left: -6px; top: 50%; margin-top: -5px; cursor: ew-resize; }
.editor-selection .handle.e  { right: -6px; top: 50%; margin-top: -5px; cursor: ew-resize; }
.editor-selection .handle.nw { top: -6px; left: -6px; cursor: nwse-resize; }
.editor-selection .handle.se { bottom: -6px; right: -6px; cursor: nwse-resize; }
.editor-selection .handle.ne { top: -6px; right: -6px; cursor: nesw-resize; }
.editor-selection .handle.sw { bottom: -6px; left: -6px; cursor: nesw-resize; }
/* 마우스 회전 손잡이 — 상단 중앙에서 위로 뻗은 원형 노브 */
.editor-selection .rot-handle {
  position: absolute;
  top: -30px;
  left: 50%;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0,0,0,0.55);
  cursor: grab;
}
.editor-selection .rot-handle::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 12px;
  width: 1px;
  height: 18px;
  margin-left: -0.5px;
  background: var(--accent);
}
.editor-selection .rot-handle:active { cursor: grabbing; }
.editor-toolbar {
  position: absolute;
  bottom: 10px;
  left: 10px;
  right: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  background: rgba(23, 26, 33, 0.85);
  padding: 6px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
  z-index: 10;
}
.editor-toolbar .ed-info { margin-left: auto; font-size: 12px; }

/* ---------- Fullscreen ---------- */
.viewer-layout:fullscreen,
.viewer-layout:-webkit-full-screen {
  width: 100vw;
  height: 100vh;
  max-width: none;
  padding: 10px;
  gap: 10px;
  background: var(--bg);
  box-sizing: border-box;
  grid-template-columns: 280px 1fr;
  grid-template-rows: 1fr;
}
@media (max-width: 900px) {
  .viewer-layout:fullscreen,
  .viewer-layout:-webkit-full-screen {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
    max-height: 100vh;
    overflow: hidden;
  }
  .viewer-layout:fullscreen .viewer-sidebar,
  .viewer-layout:-webkit-full-screen .viewer-sidebar {
    max-height: 38vh;
  }
}

#fullscreen-fab { padding: 3px 7px; font-size: 14px; line-height: 1; }

/* ---------- Mobile & tablet ---------- */
@media (max-width: 900px) {
  .viewer-layout {
    grid-template-columns: 1fr;
    grid-template-rows: 60vh auto;
    height: auto;
    min-height: calc(100vh - 80px);
    gap: 12px;
  }
  .viewer-sidebar { max-height: none; }
}

@media (max-width: 700px) {
  body { font-size: 13px; }
  .container { padding: 14px; }

  header.topbar {
    padding: 10px 14px;
    flex-wrap: wrap;
    row-gap: 6px;
    column-gap: 8px;
  }
  header.topbar > div:first-child { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; }
  header.topbar .brand { font-size: 14px; }
  header.topbar nav { margin-left: 0 !important; }
  header.topbar nav a { margin-left: 0; margin-right: 10px; font-size: 12px; }
  header.topbar .user { font-size: 12px; white-space: nowrap; }
  header.topbar .user a { margin-left: 8px; }

  h1 { font-size: 18px; margin-bottom: 12px; }
  h2 { font-size: 15px; margin: 16px 0 10px; }
  .card { padding: 14px; }
  .card + .card { margin-top: 12px; }

  .btn { padding: 8px 12px; font-size: 13px; }
  .btn.small { padding: 5px 8px; font-size: 11px; }

  input[type=text], input[type=password], input[type=number], input[type=color], textarea, select {
    font-size: 16px; /* prevents iOS zoom-on-focus */
    padding: 10px;
  }

  /* Data tables: scroll horizontally instead of squishing */
  .card > table.data,
  table.data {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }
  table.data th, table.data td { padding: 8px 10px; }
  table.data .muted { white-space: normal; }

  /* Admin layer row: wrap info onto its own line */
  .layer-row {
    flex-wrap: wrap;
    row-gap: 8px;
  }
  .layer-row .info {
    order: 3;
    flex: 1 1 100%;
  }
  .layer-row .info .meta {
    display: flex;
    flex-wrap: wrap;
    row-gap: 6px;
    column-gap: 10px;
  }
  .layer-row .info .meta input[type=range] { max-width: none !important; flex: 1 1 160px; }
  .layer-row .controls { flex-wrap: wrap; }

  /* Viewer */
  .viewer-layout {
    grid-template-rows: 55vh auto;
    gap: 10px;
  }
  .viewer-sidebar { padding: 12px; }
  .viewer-toolbar { top: 6px; right: 6px; padding: 4px 6px; }
  .viewer-stage { touch-action: none; }

  .layer-control { padding: 8px; }
  .layer-control .opacity { flex-wrap: wrap; }

  .login-box { margin: 40px auto; }

  /* Form inlines wrap */
  .form-inline { flex-wrap: wrap; }
}

@media (max-width: 400px) {
  .container { padding: 10px; }
  header.topbar nav a { margin-right: 8px; }
  .layer-row .thumb { width: 40px; height: 40px; }
}