:root {
  --bg: #0b1220;
  --bg-soft: #111a2a;
  --panel: #1a2538;
  --panel-2: #1f2d44;
  --line: #334155;
  --line-soft: #3c4d68;
  --text: #e2e8f0;
  --text-soft: #cbd5e1;
  --focus: #60a5fa;
  --radius: 10px;
}

* {
  box-sizing: border-box;
  font-family: "Pretendard", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(1200px 600px at 15% -10%, #1d2d4a 0%, transparent 60%),
    linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
  color: var(--text);
}

.auth-gate {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, .92);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 20;
}

.auth-gate.hidden { display: none; }

.auth-card {
  width: min(520px, 90vw);
  background: var(--panel);
  border: 1px solid var(--line-soft);
  border-radius: 14px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 20px 48px rgba(2, 8, 23, .45);
}

.auth-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.app {
  display: grid;
  grid-template-columns: 240px 8px 1fr 260px;
  height: 100vh;
}

.sidebar-resizer {
  background: #0f172a;
  border-left: 1px solid #374151;
  border-right: 1px solid #374151;
  cursor: col-resize;
}

.sidebar-resizer:hover { background: #1e293b; }

.sidebar,
.stats-panel {
  background: linear-gradient(180deg, var(--panel) 0%, var(--panel-2) 100%);
  padding: 12px;
  overflow: auto;
}

.sidebar-header { display: flex; justify-content: space-between; align-items: center; }

.stats-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 8px;
}

.stats-panel-header h2,
.sidebar-header h1 { margin: 0; }

.tree-item {
  padding: 6px;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.tree-item > span {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.tree-item:hover,
.tree-item.active { background: #374151; }

.tree-item.drag-over { outline: 1px dashed #60a5fa; background: #1e3a5f; }

.tree-act-btn {
  padding: 2px 8px;
  font-size: 12px;
  line-height: 1.2;
}

.tree-rename-btn { background: #1e40af; border-color: #1d4ed8; }

.tree-del-btn {
  padding: 2px 8px;
  font-size: 12px;
  line-height: 1.2;
}

.tree-indent { margin-left: 16px; }

.main { display: flex; flex-direction: column; min-width: 0; }

.toolbar {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 10px;
  background: #0f172a;
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}

.left-tools,
.right-tools { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }

#toggle-sidebar-toolbar-btn,
#toggle-calendar-toolbar-btn {
  background: #1e293b;
  border-color: #475569;
  display: none;
}

#toggle-sidebar-toolbar-btn:hover,
#toggle-calendar-toolbar-btn:hover {
  background: #2a3a52;
}

#toggle-sidebar-toolbar-btn:disabled,
#toggle-calendar-toolbar-btn:disabled {
  opacity: .58;
  cursor: not-allowed;
}

button,
input {
  cursor: pointer;
  background: #334155;
  color: var(--text);
  border: 1px solid #4b5563;
  border-radius: 8px;
  padding: 8px 12px;
  min-height: 38px;
  transition: background .16s ease, border-color .16s ease;
}

button:hover { background: #3d4f68; border-color: #64748b; }

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.danger-btn { background: #991b1b; border-color: #b91c1c; color: #fee2e2; }
.danger-btn:hover { background: #b91c1c; }
.danger-btn:disabled { opacity: .5; cursor: not-allowed; }

input { width: min(220px, 100%); }

.stats-row { display: flex; gap: 10px; padding: 10px; border-bottom: 1px solid #374151; }

.timer-box,
.daily-box {
  background: #1f2937;
  border: 1px solid #374151;
  padding: 10px;
  border-radius: 8px;
  display: flex;
  gap: 6px;
  flex-direction: column;
}

.timer-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
#timer-display { font-size: 24px; font-weight: 700; }

.stats-panel .stats-row {
  flex-direction: column;
  padding: 0 0 10px;
  margin-bottom: 10px;
}

#daily-stats { white-space: pre-line; line-height: 1.5; color: #cbd5e1; }

.editor-area { display: grid; flex: 1; min-height: 0; }
.editor-area.single { grid-template-columns: 1fr; }
.editor-area.vertical { grid-template-columns: 1fr 1fr; }
.editor-area.horizontal { grid-template-rows: 1fr 1fr; }

.pane {
  min-height: 0;
  border: 1px solid #374151;
  display: flex;
  flex-direction: column;
}

.pane.hidden { display: none; }

.pane-head {
  padding: 6px;
  background: #1f2937;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.pane-save-btn { padding: 3px 10px; font-size: 12px; }

.export-wrap { position: relative; display: inline-flex; }

.export-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  display: flex;
  gap: 6px;
  padding: 8px;
  background: #0b1220;
  border: 1px solid #334155;
  border-radius: 10px;
  z-index: 40;
  box-shadow: 0 8px 24px rgba(0,0,0,.35);
}

.hidden { display: none !important; }
.hidden-panel { display: none !important; }

.panel-icon-btn {
  width: 28px;
  height: 28px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  border-radius: 999px;
  background: #334155;
  border-color: #475569;
  transition: background .18s ease, transform .18s ease;
}

.panel-icon-btn:hover { background: #475569; transform: translateY(-1px); }

.edge-bar {
  position: fixed;
  top: 0;
  bottom: 0;
  width: 8px;
  padding: 0;
  border-radius: 0;
  z-index: 50;
  background: linear-gradient(180deg, #475569 0%, #334155 100%);
  border: 1px solid #64748b;
  opacity: .75;
  transition: opacity .18s ease, width .18s ease;
}

.edge-bar:hover { opacity: 1; width: 10px; }
.edge-bar.left { left: 4px; }
.edge-bar.right { right: 4px; }

textarea {
  flex: 1;
  width: 100%;
  resize: none;
  border: none;
  background: #0b1220;
  color: #f9fafb;
  padding: 16px;
  font-size: 17px;
  line-height: 1.74;
  letter-spacing: .01em;
}

textarea:focus { outline: none; }

.calendar { display: grid; grid-template-columns: repeat(7,1fr); gap: 4px; }

.calendar-tools {
  display: flex;
  gap: 8px;
  align-items: center;
  margin: 0 0 10px;
  flex-wrap: wrap;
}

.calendar-tools #goal-input { width: 100%; max-width: 220px; }

.day {
  padding: 6px 4px;
  background: #111827;
  border: 1px solid #374151;
  border-radius: 4px;
  text-align: center;
  font-size: 12px;
}

.day.hit::after { content: '●'; color: #34d399; display: block; font-size: 11px; }

.pill { padding: 6px 10px; background: #1f2937; border-radius: 14px; }
#history-search { width: 100%; margin-bottom: 8px; }

.danger-dialog {
  width: min(560px, 92vw);
  background: #111827;
  color: #fee2e2;
  border: 2px solid #ef4444;
  border-radius: 12px;
  padding: 18px;
}

.danger-copy { margin: 8px 0 10px; line-height: 1.5; font-weight: 700; color: #fecaca; }
.danger-strong { margin: 0 0 10px; color: #fca5a5; font-weight: 700; }
.danger-list { margin: 0 0 12px; padding-left: 20px; color: #fca5a5; line-height: 1.5; }
.danger-check { display: flex; gap: 8px; align-items: flex-start; margin: 0 0 10px; }

#withdraw-email,
#withdraw-password { width: 100%; margin: 0 0 8px; }

#withdraw-confirm-text { width: 100%; margin: 8px 0 12px; }

.danger-actions { display: flex; justify-content: flex-end; gap: 8px; }

#upgrade-dialog {
  width: min(420px, 92vw);
  background: #111827;
  color: #e5e7eb;
  border: 1px solid #374151;
  border-radius: 12px;
  padding: 16px;
}

#upgrade-email,
#upgrade-password { width: 100%; margin: 0 0 8px; }

@media (max-width: 1100px) {
  .app { grid-template-columns: 200px 8px 1fr; }
  .stats-panel { display: none; }
}

@media (max-width: 900px) {
  .app {
    grid-template-columns: 1fr !important;
    grid-auto-rows: auto;
    height: auto;
    min-height: 100vh;
    padding-left: 0 !important;
    padding-right: 0 !important;
  }

  .sidebar {
    border-bottom: 1px solid var(--line);
    max-height: 34vh;
  }

  .sidebar-resizer { display: none !important; }

  .main { min-height: 66vh; }

  .toolbar {
    position: sticky;
    top: 8px;
    z-index: 12;
    margin: 8px;
    border-radius: 14px;
    border: 1px solid #334155;
    background: rgba(15, 23, 42, .84);
    backdrop-filter: blur(8px);
    box-shadow: 0 10px 28px rgba(2, 8, 23, .3);
    padding: 9px 10px;
  }

  .left-tools,
  .right-tools {
    width: 100%;
    flex-wrap: wrap;
    overflow: visible;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 0;
    gap: 6px;
  }

  .left-tools > *,
  .right-tools > * {
    white-space: nowrap;
    flex: 0 0 auto;
  }

  .toolbar button {
    min-height: 34px;
    padding: 7px 11px;
    border-radius: 999px;
  }

  #toggle-sidebar-toolbar-btn,
  #toggle-calendar-toolbar-btn {
    min-width: 86px;
    display: inline-flex;
  }

  #split-off,
  #split-vertical,
  #split-horizontal {
    display: none;
  }

  #user-email {
    display: inline-flex;
    max-width: 56vw;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  #sync-status { display: none; }

  .editor-area.vertical { grid-template-columns: 1fr; }
  .pane { min-height: 44vh; }

  .auth-card {
    width: min(540px, 92vw);
    padding: 18px;
  }

  .auth-card input,
  #goal-input,
  #history-search,
  #auth-email,
  #auth-password { width: 100%; }

  .danger-dialog,
  #upgrade-dialog {
    width: min(560px, 94vw);
    padding: 14px;
  }

  .danger-actions { justify-content: stretch; }
  .danger-actions button { flex: 1; }

  .mobile-mini .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(84vw, 320px);
    max-height: none;
    border-right: 1px solid var(--line);
    border-bottom: none;
    z-index: 46;
    box-shadow: 18px 0 42px rgba(2, 8, 23, .5);
    animation: miniDrawerIn .18s ease-out;
  }

  .mobile-mini.mobile-mini-calendar-open .stats-panel {
    position: fixed;
    top: 0;
    bottom: 0;
    right: 0;
    width: min(86vw, 340px);
    display: block !important;
    max-height: none;
    z-index: 46;
    border-left: 1px solid var(--line);
    box-shadow: -18px 0 42px rgba(2, 8, 23, .5);
    animation: miniDrawerInRight .18s ease-out;
  }

  .mobile-mini .edge-bar.left {
    position: fixed;
    left: 12px;
    bottom: 14px;
    top: auto;
    width: auto;
    height: 40px;
    border-radius: 999px;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid #64748b;
    background: linear-gradient(180deg, #2d3e58 0%, #1f2f45 100%);
    opacity: .96;
    font-size: 13px;
    color: #e2e8f0;
  }

  .mobile-mini .edge-bar.left::after {
    content: '문서';
    line-height: 1;
    font-weight: 600;
  }

  .mobile-mini .edge-bar.right {
    display: none !important;
  }
}

@media (max-width: 640px) {
  .sidebar,
  .stats-panel { padding: 10px; }

  .pane-head { font-size: 13px; }

  textarea {
    font-size: 16px;
    line-height: 1.7;
    padding: 14px;
  }

  button,
  input { min-height: 40px; }
}

#sync-status[data-status='pending'] { background: #78350f; }
#sync-status[data-status='ok'] { background: #065f46; }
#sync-status[data-status='error'] { background: #7f1d1d; }

@keyframes miniDrawerIn {
  from { transform: translateX(-14px); opacity: .92; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes miniDrawerInRight {
  from { transform: translateX(14px); opacity: .92; }
  to { transform: translateX(0); opacity: 1; }
}