html {
  scrollbar-gutter: stable;
  background: #000;
}
html::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
html::-webkit-scrollbar-track {
  background: transparent;
}
html::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.28);
  border: 3px solid transparent;
  border-radius: 999px;
  background-clip: content-box;
}
html::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.48);
  border: 3px solid transparent;
  background-clip: content-box;
}
body {
  font-family: 'Noto Sans KR', sans-serif;
  background: #000;
  color: #fff;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  min-height: 100vh;
  padding: 16px;
  flex-direction: column;
  gap: 0;
  overflow-x: hidden;
}
.tab-content {
  display: none;
}
.tab-content.active {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.section-card {
  background: #2a2a2a;
  border-radius: 12px;
  padding: 20px;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.3);
  text-align: center;
  width: 100%;
  max-width: 800px;
}
.notepad-tabs {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 0.45rem;
  width: 100%;
  max-width: 800px;
  position: relative;
  z-index: 2;
}
#main-tabs {
  position: sticky;
  top: 0;
  z-index: 100;
  justify-content: safe center;
  overflow-x: auto;
  background: #000;
  box-shadow: 0 8px 12px rgba(0, 0, 0, 0.45);
}
.notepad-tabs {
  scrollbar-width: none;
}
.notepad-tabs::-webkit-scrollbar {
  display: none;
}
.notepad-tab {
  background: #1a1a1a;
  width: 44px;
  height: 38px;
  padding: 0;
  border-radius: 10px 10px 0 0;
  cursor: pointer;
  transition: 0.2s;
  font-weight: 700;
  color: #737373;
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  box-sizing: border-box;
  border: 1px solid transparent;
  border-bottom: 0;
}
.notepad-tab svg {
  width: 20px;
  height: 20px;
}
.notepad-tab:hover {
  background: #242424;
  color: #fff;
}
.notepad-tab.active {
  background: #2a2a2a;
  color: #fff;
  border-color: #2a2a2a;
  height: 40px;
  margin-bottom: -1px;
  box-shadow: none;
}
.notepad-tab.main-tab-hidden {
  display: none;
}

body.workmusic-tab-view-active {
  height: 100dvh;
  overflow-y: hidden;
}
body.workmusic-tab-view-active .site-footer {
  display: none;
}
body.workmusic-tab-view-active #workmusic-section.active {
  position: fixed;
  top: 55px;
  bottom: 78px;
  left: 50%;
  width: calc(100% - 32px);
  max-height: none;
  overflow-x: hidden;
  overflow-y: auto;
  transform: translateX(-50%);
  scrollbar-color: rgba(255, 255, 255, 0.28) transparent;
  scrollbar-width: thin;
}
body.workmusic-tab-view-active #workmusic-section.active::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}
body.workmusic-tab-view-active #workmusic-section.active::-webkit-scrollbar-track {
  background: transparent;
}
body.workmusic-tab-view-active #workmusic-section.active::-webkit-scrollbar-thumb {
  border: 3px solid transparent;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.28);
  background-clip: content-box;
}
body.workmusic-tab-view-active #workmusic-section.active::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.48);
  background-clip: content-box;
}
.site-footer {
  width: 100%;
  max-width: 800px;
  margin: auto auto 0;
  padding: 8px 4px 2px;
  border-top: 1px solid #252525;
  color: #8f8f8f;
  font-size: 0.72rem;
  line-height: 1.2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 10px;
}
.site-footer-brand {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  white-space: nowrap;
}
.site-footer strong {
  color: #d8d8d8;
  font-size: 0.78rem;
  font-weight: 800;
}
.site-footer span {
  color: #9a9a9a;
}
.site-footer strong::after {
  content: '-';
  margin-left: 6px;
  color: #777;
  font-weight: 500;
}
.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 4px 10px;
  min-width: 0;
}
.site-footer a {
  color: #d8d8d8;
  text-decoration: none;
}
.site-footer a:hover {
  color: #fff;
  text-decoration: underline;
}

.notes-tab,
.bookmark-tab,
.workmusic-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  box-sizing: border-box;
}
.notes-tab .tab-label,
.bookmark-tab .tab-label,
.workmusic-tab .tab-label {
  min-width: 0;
  max-width: 132px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.tab-settings-trigger {
  width: 22px;
  height: 22px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  flex: 0 0 auto;
  transition:
    background 0.2s,
    transform 0.15s;
}
.tab-settings-trigger:hover {
  background: rgba(255, 255, 255, 0.22);
  transform: scale(1.04);
}
.tab-settings-trigger svg {
  width: 14px;
  height: 14px;
  display: block;
}
.new-inner-tab {
  background: #2f2f2f;
  border-style: dashed;
  color: #cfcfcf;
}
.new-inner-tab:hover {
  background: #3b3b3b;
  color: #fff;
}
.tab-settings-modal {
  background: #2a2a2a;
  max-width: 360px;
  text-align: left;
}
.tab-settings-title {
  font-size: 1rem;
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
  text-align: center;
}
.tab-settings-icons {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 14px;
  flex-wrap: wrap;
}

/* 아이콘 버튼 (메모 + / 편집) */

.icon-btn {
  background: transparent;
  border: none;
  padding: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  cursor: pointer;
}
.icon-btn:hover {
  background: rgba(255, 255, 255, 0.08);
}
.icon-btn svg {
  width: 18px;
  height: 18px;
  display: block;
}
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
}
.modal-content {
  background: #1a1a1a;
  border-radius: 12px;
  padding: 24px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  position: relative;
}
.drag-area {
  border: 2px dashed #4b4b4b;
  transition: all 0.3s ease;
  padding: 24px;
}
.drag-area.active {
  border-color: #6b6b6b;
  background-color: #2a2a2a;
}
.drag-over {
  border-color: #6b6b6b;
  background-color: #2a2a2a;
}

@media (max-width: 768px) {
  body {
    padding: 12px 0 76px;
    gap: 0;
    align-items: stretch;
  }
  .section-card {
    width: 100%;
    max-width: none;
    padding: 12px;
    border-radius: 0;
    box-sizing: border-box;
  }
  .notepad-tabs {
    width: 100%;
    max-width: none;
    justify-content: center;
    gap: 0.5rem;
    overflow-x: auto;
    padding: 0 8px;
    box-sizing: border-box;
  }
  .notepad-tab {
    padding: 0;
    font-size: 0.8rem;
    flex: 0 0 auto;
  }
  .modal-content {
    padding: 16px;
    width: 95%;
  }
  .site-footer {
    max-width: none;
    width: 100%;
    box-sizing: border-box;
    padding: 7px 10px 2px;
    font-size: 0.68rem;
    gap: 8px;
  }
  .site-footer-brand {
    gap: 4px;
  }
  .site-footer strong {
    font-size: 0.72rem;
  }
  .site-footer strong::after {
    margin-left: 4px;
  }
  .site-footer nav {
    gap: 3px 8px;
  }
}

.drive-save-indicator {
  display: inline-flex;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  padding: 6px;
  border: 1px solid #444;
  border-radius: 50%;
  align-self: center;
  align-items: center;
  justify-content: center;
  background: #1a1a1a;
  color: #ddd;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease;
}
.drive-save-indicator.show {
  visibility: visible;
  opacity: 1;
}
.drive-save-indicator svg {
  width: 100%;
  height: 100%;
}
.drive-save-indicator.busy svg {
  animation: drive-status-spin 900ms linear infinite;
}
@keyframes drive-status-spin {
  to {
    transform: rotate(360deg);
  }
}
@media (prefers-reduced-motion: reduce) {
  .drive-save-indicator.busy svg {
    animation: none;
  }
}