:root {
  --bg: #c9d1d8;
  --bg-deep: #b4c0c8;
  --window: #eceff1;
  --titlebar: linear-gradient(180deg, #f6f7f8 0%, #e3e6ea 100%);
  --toolbar: #e8ebef;
  --row: #ffffff;
  --row-alt: #f5f7f9;
  --row-hover: #e8f0fe;
  --row-selected: #0a5fff;
  --row-selected-text: #ffffff;
  --ink: #1c1c1e;
  --muted: #6b7280;
  --line: #c5CAD1;
  --accent: #0b5fff;
  --accent-2: #0047d9;
  --danger: #c0392b;
  --folder: #5cadff;
  --folder-dark: #2f7fd4;
  --file: #8e99a8;
  --shadow: 0 10px 28px rgba(20, 28, 36, 0.14);
  --radius: 10px;
  --font: -apple-system, "SF Pro Text", "Segoe UI", "Apple SD Gothic Neo", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body {
  height: 100%;
  overflow: hidden;
}
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    linear-gradient(180deg, #d7dee5 0%, #bbc5cf 100%);
}

.app {
  max-width: 1440px;
  margin: 0 auto;
  padding: 12px 14px 14px;
  height: 100%;
  max-height: 100dvh;
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
}

.top {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: space-between;
  align-items: flex-end;
  flex: 0 0 auto;
}
.brand-mark {
  display: block;
  font-size: 1.7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
}
.brand-sub { color: var(--muted); font-size: 0.88rem; }

.conn {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.auto-badge {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: #e8f0fe;
  color: var(--accent);
  font-weight: 650;
  font-size: 0.88rem;
  border: 1px solid #c5d7f5;
}
.auto-badge.ok { background: #dff5e8; color: #0f6e56; border-color: #b7ddd1; }
.auto-badge.wait { background: #eef1f4; color: var(--muted); border-color: var(--line); }

button {
  font: inherit;
  border-radius: 8px;
  border: 1px solid var(--line);
  padding: 9px 13px;
  cursor: pointer;
  background: #fff;
  color: var(--ink);
}
button:disabled { opacity: 0.4; cursor: not-allowed; }
button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
button.primary:hover:not(:disabled) { background: var(--accent-2); }
button.primary.compact { padding: 6px 12px; font-size: 0.84rem; }
button.ghost:hover:not(:disabled) { background: #e8ebef; }

.control-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #f4f6f8;
}
.control-switch .control-btn {
  border: none;
  border-radius: 0;
  padding: 8px 11px;
  font-size: 0.84rem;
  background: transparent;
}
.control-switch .control-btn + .control-btn {
  border-left: 1px solid var(--line);
}
.control-switch .control-btn.active {
  background: var(--accent);
  color: #fff;
  font-weight: 650;
}
.control-switch .control-btn:hover:not(:disabled):not(.active) {
  background: #e8ebef;
}

.peer-bar {
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 0.88rem;
  box-shadow: var(--shadow);
  flex: 0 0 auto;
}

.main {
  display: grid;
  grid-template-columns: 1fr 1fr 0.75fr;
  gap: 12px;
  flex: 1 1 auto;
  min-height: 0; /* flex 자식이 늘어나지 않고 내부 스크롤 */
  overflow: hidden;
}
.main.ftp-layout {
  grid-template-columns: minmax(0, 1fr) 132px minmax(0, 1fr);
  align-items: stretch;
}
@media (max-width: 1100px) {
  html, body { overflow: auto; }
  .app {
    height: auto;
    max-height: none;
    overflow: visible;
  }
  .main,
  .main.ftp-layout {
    grid-template-columns: 1fr;
    min-height: 0;
    overflow: visible;
  }
  .finder,
  .transfer-rail {
    height: min(70dvh, 640px);
    max-height: 70dvh;
    min-height: 280px;
  }
  .transfer-rail {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    padding: 12px;
  }
  .rail-paths { width: 100%; }
  .rail-progress { width: 100%; }
}

/* ===== Finder / Explorer window ===== */
.finder {
  background: var(--window);
  border: 1px solid #9aa3ad;
  border-radius: 11px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 0;
  height: 100%;
  max-height: 100%;
  overflow: hidden;
}
.finder-titlebar {
  background: var(--titlebar);
  border-bottom: 1px solid #c0c6cd;
  padding: 8px 12px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  user-select: none;
}
.finder-title { font-weight: 700; font-size: 0.92rem; }
.finder-subtitle { color: var(--muted); font-size: 0.78rem; }

.finder-toolbar {
  background: var(--toolbar);
  border-bottom: 1px solid #cfd4da;
  padding: 8px 10px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.nav-group {
  display: flex;
  gap: 4px;
  flex: 0 0 auto;
}
.tool-btn {
  width: 32px;
  height: 28px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 7px;
  background: linear-gradient(180deg, #fff, #eef1f4);
  border: 1px solid #b8c0c9;
}
.tool-btn.wide {
  width: auto;
  padding: 0 10px;
  font-size: 0.78rem;
  font-weight: 600;
}
.tool-btn svg {
  width: 14px;
  height: 14px;
  fill: #3a4450;
}
.tool-btn:hover:not(:disabled) { background: #fff; }
.tool-btn:active:not(:disabled) { background: #dde3ea; }

.address-bar {
  flex: 1;
  min-width: 0;
  height: 28px;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 0 8px;
  background: #fff;
  border: 1px solid #b8c0c9;
  border-radius: 7px;
  overflow: hidden;
  white-space: nowrap;
  font-family: var(--mono);
  font-size: 0.78rem;
}
.path-sep { color: #9aa3ad; flex: 0 0 auto; }
button.path-crumb {
  flex: 0 1 auto;
  min-width: 0;
  max-width: 36%;
  padding: 2px 6px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  font-family: var(--mono);
  font-size: 0.78rem;
  overflow: hidden;
  text-overflow: ellipsis;
}
button.path-crumb:hover {
  background: var(--row-hover);
  color: var(--accent);
}

.finder-cols {
  display: grid;
  grid-template-columns: minmax(140px, 1.6fr) 140px 88px 90px;
  gap: 0;
  background: linear-gradient(180deg, #f4f5f7, #e7eaee);
  border-bottom: 1px solid #c5CAD1;
  user-select: none;
}
.col-btn {
  border: none;
  border-right: 1px solid #d0d5db;
  border-radius: 0;
  background: transparent;
  text-align: left;
  padding: 6px 10px;
  font-size: 0.72rem;
  font-weight: 650;
  color: #4b5563;
  letter-spacing: -0.01em;
}
.col-btn:last-child { border-right: none; }
.col-btn:hover { background: rgba(255,255,255,0.55); }
.col-btn.active { color: var(--accent); }

.finder.drop-target {
  outline: 2px solid var(--accent);
  outline-offset: -2px;
  background: #eef4ff;
}
.finder-table tr.drop-target {
  background: #d6e6ff !important;
  box-shadow: inset 0 0 0 2px var(--accent);
}
.finder-table tr.parent-row .name-cell span {
  font-weight: 700;
  letter-spacing: 0.04em;
}
.finder-table tr.parent-row {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #eef3f8 !important;
  box-shadow: 0 1px 0 #c5cad1;
  cursor: pointer;
}
.finder-table tr.parent-row:hover {
  background: #e0ebf8 !important;
}
.finder-table tr.parent-row-root {
  opacity: 0.55;
  cursor: default;
}
.finder-table tr.parent-row:hover:not(.selected):not(.checked) {
  background: #e0ebf8 !important;
}
.finder.local-browser.drop-target .finder-empty,
.finder.remote-browser.drop-target .finder-empty {
  color: var(--accent);
}
.finder-titlebar,
.finder-toolbar,
.finder-cols,
.finder-status {
  flex: 0 0 auto;
}
.finder-scroll {
  flex: 1 1 auto;
  min-height: 0; /* 핵심: 목록만 스크롤 */
  overflow: auto;
  background: var(--row);
  position: relative;
  overscroll-behavior: contain;
}
.finder-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}
.finder-table tr {
  cursor: default;
  user-select: none;
}
.finder-table tr:nth-child(even):not(.selected):not(.checked) {
  background: var(--row-alt);
}
.finder-table tr:hover:not(.selected):not(.checked) {
  background: var(--row-hover);
}
.finder-table tr.selected,
.finder-table tr.checked {
  background: var(--row-selected) !important;
  color: var(--row-selected-text);
}
.finder-table tr.selected .muted,
.finder-table tr.checked .muted,
.finder-table tr.selected .kind,
.finder-table tr.checked .kind {
  color: rgba(255,255,255,0.85);
}
.finder-table td {
  padding: 5px 10px;
  font-size: 0.84rem;
  border-bottom: 1px solid transparent;
  vertical-align: middle;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.finder-table .name-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.finder-table .name-cell span {
  overflow: hidden;
  text-overflow: ellipsis;
}
.finder-table .col-name { width: auto; }
.finder-table .col-date { width: 140px; color: var(--muted); font-variant-numeric: tabular-nums; }
.finder-table .col-size { width: 88px; color: var(--muted); text-align: right; font-variant-numeric: tabular-nums; }
.finder-table .col-kind { width: 90px; color: var(--muted); }

.item-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}
.item-icon.folder { color: var(--folder); }
.item-icon.file { color: var(--file); }
.finder-table tr.selected .item-icon,
.finder-table tr.checked .item-icon { color: #fff; }

.finder-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 0.9rem;
  pointer-events: none;
  padding: 24px;
  text-align: center;
}
.finder-empty.hidden { display: none; }

.finder-status {
  border-top: 1px solid #cfd4da;
  background: #eef1f4;
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  font-size: 0.78rem;
  color: var(--muted);
}
.dest-hint strong {
  color: var(--ink);
  font-family: var(--mono);
  font-weight: 600;
}
.path-hint {
  font-family: var(--mono);
  color: var(--ink);
  max-width: 55%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* FTP 가운데 전송 레일 */
.transfer-rail {
  background: var(--window);
  border: 1px solid #9aa3ad;
  border-radius: 11px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 10px;
  min-height: 0;
  height: 100%;
  max-height: 100%;
  overflow: auto;
}
.rail-paths {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 4px;
}
.rail-path {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 6px 8px;
  font-size: 0.72rem;
  min-width: 0;
}
.rail-label {
  display: block;
  color: var(--muted);
  margin-bottom: 2px;
}
.rail-path strong {
  display: block;
  font-family: var(--mono);
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.xfer-btn {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 12px 8px;
  border-radius: 10px;
  border: 1px solid #b8c0c9;
  background: linear-gradient(180deg, #fff, #eef1f4);
  font-weight: 700;
}
.xfer-btn:hover:not(:disabled) {
  border-color: var(--accent);
  background: #e8f0fe;
  color: var(--accent);
}
.xfer-arrow {
  font-size: 1.35rem;
  line-height: 1;
}
.xfer-text { font-size: 0.78rem; }
.rail-hint {
  margin: 4px 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.72rem;
  line-height: 1.35;
}
.rail-progress {
  width: 100%;
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.rail-progress .status {
  font-size: 0.72rem;
  text-align: center;
  word-break: keep-all;
}

.drop-pane {
  display: none;
}
.drop-zone {
  flex: 1;
  border: 2px dashed #9aa8b8;
  border-radius: 12px;
  background: linear-gradient(180deg, #f7f9fb, #e8eef4);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  transition: border-color 0.15s ease, background 0.15s ease;
}
.drop-zone.dragover {
  border-color: var(--accent);
  background: #e8f0fe;
}
.drop-title {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
}
.drop-hint {
  margin: 0 0 16px;
  color: var(--muted);
  max-width: 26ch;
  line-height: 1.45;
  font-size: 0.88rem;
}
.file-pick {
  display: inline-block;
  padding: 8px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
  font-size: 0.88rem;
}
.file-pick:hover { border-color: var(--accent); color: var(--accent); }

.progress-wrap {
  height: 8px;
  background: #d5dbe3;
  border-radius: 999px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), #5cadff);
  transition: width 0.12s linear;
}
.status {
  min-height: 1.35em;
  color: var(--muted);
  font-size: 0.88rem;
}
.status.error { color: var(--danger); }
.hidden { display: none !important; }

.settings-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
}
.settings-btn svg { display: block; }

.modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
}
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(18, 24, 32, 0.38);
}
.modal-panel {
  position: relative;
  width: min(520px, 100%);
  max-height: min(86vh, 720px);
  overflow: auto;
  background: #f7f8fa;
  border: 1px solid var(--line);
  border-radius: 12px;
  box-shadow: var(--shadow);
  padding: 18px 18px 16px;
}
.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}
.modal-head h2 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}
.modal-lead {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.45;
}
.ports-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.port-row {
  display: grid;
  grid-template-columns: 1fr 118px;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
}
.port-meta {
  min-width: 0;
}
.port-label {
  display: block;
  font-weight: 650;
  font-size: 0.92rem;
}
.port-desc {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: 2px;
  line-height: 1.35;
}
.port-proto {
  display: inline-block;
  margin-top: 4px;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #4b5563;
  background: #eef1f4;
  border-radius: 4px;
  padding: 1px 6px;
}
.port-input {
  width: 100%;
  font: inherit;
  font-family: var(--mono);
  font-size: 0.95rem;
  text-align: right;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbfc;
}
.port-input:focus {
  outline: 2px solid #c5d7f5;
  border-color: var(--accent);
}
.ports-path {
  margin: 12px 0 0;
  font-size: 0.78rem;
  word-break: break-all;
}
.settings-msg {
  margin: 10px 0 0;
  font-size: 0.88rem;
  color: var(--accent);
}
.settings-msg.error { color: var(--danger); }
.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 16px;
}

@media (max-width: 560px) {
  .port-row {
    grid-template-columns: 1fr;
  }
  .port-input { text-align: left; }
}