/* ═══════════════════════════════════════════════════════════════════════
 * Samsung Notes 1:1 One UI 6.1 / 7.0 Stylesheet (Galaxy Tab & Mobile PWA)
 * ═══════════════════════════════════════════════════════════════════════ */
:root {
  --sn-bg: #F6F6F8;
  --sn-surface: #FFFFFF;
  --sn-surface-2: #EFEFF4;
  --sn-surface-hover: rgba(0, 0, 0, 0.045);
  --sn-border: rgba(0, 0, 0, 0.075);
  --sn-border-strong: rgba(0, 0, 0, 0.14);
  --sn-text: #17171A;
  --sn-text-sub: #6E6E77;
  --sn-text-muted: #9898A3;
  --sn-accent: #EB5A28;
  --sn-accent-hover: #D94D1D;
  --sn-accent-soft: rgba(235, 90, 40, 0.12);
  --sn-blue: #0381FE;
  --sn-blue-soft: rgba(3, 129, 254, 0.12);
  --sn-danger: #D93025;
  --sn-success: #1E8E3E;
  --sn-canvas-well: #E7E7EC;
  --sn-shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.05);
  --sn-shadow-md: 0 8px 28px rgba(0, 0, 0, 0.09);
  --sn-shadow-lg: 0 18px 48px rgba(0, 0, 0, 0.16);
  --sn-radius-card: 22px;
  --sn-radius-pill: 999px;
  --sn-font: -apple-system, BlinkMacSystemFont, "SamsungOne", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

[data-theme="dark"] {
  --sn-bg: #000000;
  --sn-surface: #1C1C1F;
  --sn-surface-2: #27272C;
  --sn-surface-hover: rgba(255, 255, 255, 0.065);
  --sn-border: rgba(255, 255, 255, 0.09);
  --sn-border-strong: rgba(255, 255, 255, 0.18);
  --sn-text: #F4F4F7;
  --sn-text-sub: #A0A0AB;
  --sn-text-muted: #6E6E78;
  --sn-accent: #FC6B3F;
  --sn-accent-hover: #EB5A28;
  --sn-accent-soft: rgba(252, 107, 63, 0.16);
  --sn-blue: #3897FF;
  --sn-blue-soft: rgba(56, 151, 255, 0.16);
  --sn-danger: #FF5449;
  --sn-success: #34A853;
  --sn-canvas-well: #0E0E11;
  --sn-shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.35);
  --sn-shadow-md: 0 10px 32px rgba(0, 0, 0, 0.52);
  --sn-shadow-lg: 0 20px 56px rgba(0, 0, 0, 0.72);
}

*, *::before, *::after {
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--sn-font);
  background: var(--sn-bg);
  color: var(--sn-text);
  user-select: none;
  -webkit-user-select: none;
}

input, textarea, [contenteditable="true"] {
  user-select: text;
  -webkit-user-select: text;
  font-family: inherit;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: transparent;
  color: inherit;
}

.hidden {
  display: none !important;
}

/* ═══════════════════════════════════════════════════════════════════════
 * SAMSUNG ACCOUNT / VAULT SIGN-IN GATE
 * ═══════════════════════════════════════════════════════════════════════ */
.sn-auth-screen {
  position: fixed;
  inset: 0;
  z-index: 900;
  background: var(--sn-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  overflow-y: auto;
}

.sn-auth-card {
  width: 100%;
  max-width: 430px;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  border-radius: 28px;
  padding: 38px 34px 34px;
  box-shadow: var(--sn-shadow-md);
}

.sn-auth-brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 28px;
}

.sn-auth-logo {
  width: 68px;
  height: 68px;
  border-radius: 18px;
  margin-bottom: 14px;
  box-shadow: 0 6px 20px rgba(235, 90, 40, 0.28);
}

.sn-auth-brand h1 {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.sn-auth-brand p {
  margin: 6px 0 0;
  font-size: 13.5px;
  color: var(--sn-text-sub);
}

.sn-field {
  margin-bottom: 16px;
}

.sn-field label {
  display: block;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--sn-text-sub);
  margin-bottom: 6px;
}

.sn-input {
  width: 100%;
  padding: 13px 16px;
  font-size: 15px;
  color: var(--sn-text);
  background: var(--sn-surface-2);
  border: 1.5px solid transparent;
  border-radius: 14px;
  outline: none;
  transition: border-color 0.16s, background 0.16s;
}

.sn-input:focus {
  border-color: var(--sn-accent);
  background: var(--sn-surface);
}

.sn-btn-primary {
  width: 100%;
  padding: 13.5px 22px;
  border-radius: var(--sn-radius-pill);
  background: var(--sn-accent);
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  transition: background 0.15s, transform 0.1s;
}

.sn-btn-primary:hover {
  background: var(--sn-accent-hover);
}

.sn-btn-primary:active {
  transform: scale(0.985);
}

.sn-btn-secondary {
  padding: 10px 18px;
  border-radius: var(--sn-radius-pill);
  background: var(--sn-surface-2);
  color: var(--sn-text);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.15s;
}

.sn-btn-secondary:hover {
  background: var(--sn-border-strong);
}

.sn-auth-error {
  margin-bottom: 14px;
  padding: 11px 14px;
  border-radius: 12px;
  background: rgba(217, 48, 37, 0.1);
  color: var(--sn-danger);
  font-size: 13px;
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════════════
 * MAIN ONE UI SHELL & LEFT NAVIGATION DRAWER
 * ═══════════════════════════════════════════════════════════════════════ */
.sn-app-shell {
  display: flex;
  width: 100%;
  height: 100dvh;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  background: var(--sn-bg);
  position: relative;
}

.sn-drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.42);
  z-index: 95;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

.sn-drawer-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

.sn-drawer {
  width: 276px;
  min-width: 276px;
  height: 100%;
  background: var(--sn-bg);
  border-right: 1px solid var(--sn-border);
  display: flex;
  flex-direction: column;
  padding: 14px 12px 18px;
  transition: margin-left 0.24s cubic-bezier(0.22, 1, 0.36, 1), transform 0.24s cubic-bezier(0.22, 1, 0.36, 1);
  z-index: 100;
}

.sn-drawer.collapsed {
  margin-left: -276px;
}

.sn-drawer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 6px 14px;
}

.sn-drawer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16.5px;
}

.sn-drawer-brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.sn-icon-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--sn-text);
  transition: background 0.14s;
  flex-shrink: 0;
}

.sn-icon-btn:hover {
  background: var(--sn-surface-hover);
}

.sn-icon-btn.active {
  background: var(--sn-accent-soft);
  color: var(--sn-accent);
}

.sn-drawer-scroll {
  flex: 1;
  overflow-y: auto;
  padding-right: 2px;
}

.sn-nav-item {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10.5px 14px;
  border-radius: 14px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--sn-text);
  text-align: left;
  margin-bottom: 2px;
  transition: background 0.14s;
}

.sn-nav-item:hover {
  background: var(--sn-surface-hover);
}

.sn-nav-item.active {
  background: var(--sn-surface-2);
  font-weight: 700;
  color: var(--sn-accent);
}

.sn-nav-item .sn-nav-count {
  margin-left: auto;
  font-size: 12.5px;
  color: var(--sn-text-sub);
  font-weight: 500;
}

.sn-drawer-divider {
  height: 1px;
  background: var(--sn-border);
  margin: 12px 10px;
}

.sn-drawer-section-hdr {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 4px 12px 6px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--sn-text-sub);
}

.sn-folder-dot {
  width: 16px;
  height: 14px;
  border-radius: 3px;
  display: inline-block;
  flex-shrink: 0;
}

.sn-sync-pill {
  width: 100%;
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--sn-text-sub);
  transition: background 0.15s, border-color 0.15s;
}

.sn-sync-pill:hover {
  background: var(--sn-surface-2);
  border-color: var(--sn-border-strong);
  color: var(--sn-text);
}

.sn-sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--sn-success);
  flex-shrink: 0;
}

.sn-sync-dot.syncing {
  background: var(--sn-blue);
}

.sn-sync-dot.offline {
  background: #E67700;
}

/* ═══════════════════════════════════════════════════════════════════════
 * HOME NOTES BROWSER (ONE UI EXPANDABLE HEADER + GRID/LIST)
 * ═══════════════════════════════════════════════════════════════════════ */
.sn-browser-pane {
  flex: 1;
  min-width: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  position: relative;
  background: var(--sn-bg);
}

.sn-browser-hero {
  padding: 22px 28px 8px;
  transition: padding 0.18s ease;
}

.sn-browser-hero h1 {
  margin: 0;
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.sn-browser-hero p {
  margin: 4px 0 0;
  font-size: 13.5px;
  color: var(--sn-text-sub);
}

.sn-browser-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 22px 12px;
  gap: 10px;
}

.sn-toolbar-left, .sn-toolbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sn-search-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  border-radius: var(--sn-radius-pill);
  padding: 6px 14px;
  width: 280px;
  max-width: 52vw;
  box-shadow: var(--sn-shadow-sm);
}

.sn-search-bar input {
  border: none;
  background: transparent;
  color: var(--sn-text);
  font-size: 14px;
  width: 100%;
  outline: none;
}

.sn-sort-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 12px;
  border-radius: var(--sn-radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--sn-text-sub);
  background: var(--sn-surface-2);
}

.sn-notes-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 8px 26px 104px;
}

.sn-notes-grid {
  display: grid;
  gap: 22px 18px;
}

.sn-notes-grid.grid_small {
  grid-template-columns: repeat(auto-fill, minmax(145px, 1fr));
}

.sn-notes-grid.grid_medium {
  grid-template-columns: repeat(auto-fill, minmax(195px, 1fr));
}

.sn-notes-grid.grid_large {
  grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
}

.sn-notes-grid.list, .sn-notes-grid.simple_list {
  grid-template-columns: 1fr;
  gap: 10px;
}

.sn-note-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  cursor: pointer;
  position: relative;
  transition: transform 0.15s ease;
}

.sn-note-card:hover {
  transform: translateY(-2px);
}

.sn-note-thumb-wrap {
  width: 100%;
  aspect-ratio: 900 / 1220;
  background: var(--sn-surface);
  border-radius: 18px;
  border: 1px solid var(--sn-border);
  box-shadow: var(--sn-shadow-sm);
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
}

.sn-note-card.selected .sn-note-thumb-wrap {
  border: 2.5px solid var(--sn-accent);
}

.sn-note-thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.sn-note-thumb-fallback {
  padding: 16px 15px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--sn-text-sub);
  overflow: hidden;
  flex: 1;
  white-space: pre-wrap;
  word-break: break-word;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0px,
    transparent 23px,
    var(--sn-border) 24px
  );
}

.sn-note-locked-cover {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--sn-text-sub);
  background: var(--sn-surface-2);
}

.sn-card-badges {
  position: absolute;
  bottom: 8px;
  right: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.sn-card-badge {
  padding: 3px 6px;
  border-radius: 8px;
  font-size: 10.5px;
  font-weight: 700;
  background: rgba(23, 23, 26, 0.72);
  color: #FFFFFF;
  backdrop-filter: blur(4px);
}

.sn-card-fav {
  position: absolute;
  top: 8px;
  right: 8px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  color: #F59F00;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

[data-theme="dark"] .sn-card-fav {
  background: rgba(28, 28, 31, 0.85);
}

.sn-card-check {
  position: absolute;
  top: 9px;
  left: 9px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--sn-text-sub);
  background: var(--sn-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: #FFFFFF;
  z-index: 3;
}

.sn-note-card.selected .sn-card-check {
  background: var(--sn-accent);
  border-color: var(--sn-accent);
}

.sn-note-meta {
  text-align: center;
  padding: 9px 6px 2px;
}

.sn-note-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--sn-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sn-note-date {
  font-size: 11.5px;
  color: var(--sn-text-sub);
  margin-top: 2px;
}

/* List & Simple List layout variants */
.sn-notes-grid.list .sn-note-card,
.sn-notes-grid.simple_list .sn-note-card {
  flex-direction: row;
  align-items: center;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  border-radius: 18px;
  padding: 12px 16px;
  gap: 16px;
}

.sn-notes-grid.list .sn-note-thumb-wrap {
  width: 66px;
  height: 86px;
  aspect-ratio: auto;
  border-radius: 10px;
  flex-shrink: 0;
}

.sn-notes-grid.simple_list .sn-note-thumb-wrap {
  display: none;
}

.sn-notes-grid.list .sn-note-meta,
.sn-notes-grid.simple_list .sn-note-meta {
  text-align: left;
  flex: 1;
  min-width: 0;
  padding: 0;
}

/* Samsung Notes Coral-Orange Squircle FAB */
.sn-fab {
  position: fixed;
  right: 28px;
  bottom: calc(28px + env(safe-area-inset-bottom, 0px));
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--sn-accent);
  color: #FFFFFF;
  box-shadow: 0 8px 24px rgba(235, 90, 40, 0.38);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 50;
  transition: transform 0.16s, background 0.16s;
}

.sn-fab:hover {
  background: var(--sn-accent-hover);
  transform: scale(1.05);
}

.sn-fab:active {
  transform: scale(0.95);
}

.sn-dropzone-overlay {
  position: absolute;
  inset: 12px;
  z-index: 85;
  border-radius: 24px;
  background: rgba(3, 129, 254, 0.10);
  border: 2.5px dashed var(--sn-blue);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.sn-dropzone-box {
  background: var(--sn-surface);
  padding: 26px 32px;
  border-radius: 22px;
  box-shadow: var(--sn-shadow-lg);
  text-align: center;
  color: var(--sn-blue);
  max-width: 90%;
}

/* Batch Multi-Select Bottom Action Bar */
.sn-batch-bar {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  background: var(--sn-surface);
  border: 1px solid var(--sn-border-strong);
  border-radius: 22px;
  box-shadow: var(--sn-shadow-lg);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 80;
}

.sn-batch-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 12px;
  border-radius: 12px;
  font-size: 11.5px;
  font-weight: 600;
}

.sn-batch-btn:hover {
  background: var(--sn-surface-hover);
}

/* ═══════════════════════════════════════════════════════════════════════
 * 1:1 SAMSUNG NOTES S PEN EDITOR VIEW
 * ═══════════════════════════════════════════════════════════════════════ */
.sn-editor-screen {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--sn-canvas-well);
  display: flex;
  flex-direction: column;
  padding-top: env(safe-area-inset-top, 0px);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.sn-editor-topbar {
  height: 54px;
  background: var(--sn-surface);
  border-bottom: 1px solid var(--sn-border);
  display: flex;
  align-items: center;
  padding: 0 10px;
  gap: 6px;
  z-index: 30;
}

.sn-editor-title-input {
  border: none;
  background: transparent;
  color: var(--sn-text);
  font-size: 16.5px;
  font-weight: 600;
  min-width: 110px;
  width: 210px;
  max-width: 26vw;
  padding: 6px 8px;
  border-radius: 10px;
  outline: none;
}

.sn-editor-title-input:focus {
  background: var(--sn-surface-2);
}

.sn-editor-tools-center {
  display: flex;
  align-items: center;
  gap: 3px;
  margin: 0 auto;
  background: var(--sn-surface-2);
  padding: 3px 6px;
  border-radius: var(--sn-radius-pill);
  overflow-x: auto;
  max-width: 54vw;
}

.sn-tool-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--sn-text-sub);
  position: relative;
  flex-shrink: 0;
  transition: background 0.14s, color 0.14s;
}

.sn-tool-btn:hover {
  background: var(--sn-surface-hover);
  color: var(--sn-text);
}

.sn-tool-btn.active {
  background: var(--sn-surface);
  color: var(--sn-accent);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.sn-tool-color-bar {
  position: absolute;
  bottom: 4px;
  width: 14px;
  height: 3px;
  border-radius: 2px;
}

.sn-editor-actions-right {
  display: flex;
  align-items: center;
  gap: 4px;
}

.sn-page-pill-btn {
  padding: 5px 11px;
  border-radius: var(--sn-radius-pill);
  background: var(--sn-surface-2);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--sn-text);
}

/* Rich Text Secondary Formatting Strip */
.sn-richtext-bar {
  height: 44px;
  background: var(--sn-surface);
  border-bottom: 1px solid var(--sn-border);
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 14px;
  overflow-x: auto;
  z-index: 25;
}

.sn-rt-btn {
  padding: 5px 9px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--sn-text);
  flex-shrink: 0;
}

.sn-rt-btn:hover {
  background: var(--sn-surface-hover);
}

/* Favorite Pens Quick Rack (Floating One UI Dock) */
.sn-fav-pens-dock {
  position: absolute;
  left: 14px;
  top: 18px;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  border-radius: 20px;
  padding: 8px 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  box-shadow: var(--sn-shadow-md);
  z-index: 28;
}

.sn-fav-pen-slot {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border: 1.5px solid transparent;
}

.sn-fav-pen-slot.active {
  border-color: var(--sn-accent);
  background: var(--sn-accent-soft);
}

/* Tool Settings Popover (Pen Picker / Highlighter / Eraser / Shapes) */
.sn-tool-popover {
  position: absolute;
  top: 62px;
  left: 50%;
  transform: translateX(-50%);
  width: 336px;
  max-width: 94vw;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border-strong);
  border-radius: 22px;
  padding: 16px 18px;
  box-shadow: var(--sn-shadow-lg);
  z-index: 45;
}

.sn-pen-types-row {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 6px;
  margin-bottom: 14px;
}

.sn-pen-type-card {
  padding: 8px 4px;
  border-radius: 12px;
  background: var(--sn-surface-2);
  font-size: 11px;
  font-weight: 600;
  text-align: center;
  border: 1.5px solid transparent;
}

.sn-pen-type-card.active {
  border-color: var(--sn-accent);
  color: var(--sn-accent);
  background: var(--sn-accent-soft);
}

.sn-swatches-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.sn-color-swatch {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 2px solid rgba(0, 0, 0, 0.14);
  margin: 0 auto;
  transition: transform 0.12s;
}

.sn-color-swatch.active {
  transform: scale(1.2);
  box-shadow: 0 0 0 2px var(--sn-surface), 0 0 0 4px var(--sn-accent);
}

.sn-slider-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
  font-size: 12.5px;
  color: var(--sn-text-sub);
}

.sn-slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--sn-accent);
}

/* Main Editor Body (Supports Split-Screen Dual Note View!) */
.sn-editor-body {
  flex: 1;
  min-height: 0;
  display: flex;
  position: relative;
  overflow: hidden;
}

.sn-split-ref-pane {
  width: 44%;
  min-width: 300px;
  height: 100%;
  background: var(--sn-bg);
  border-right: 2px solid var(--sn-border-strong);
  display: flex;
  flex-direction: column;
}

.sn-split-ref-hdr {
  padding: 8px 14px;
  background: var(--sn-surface);
  border-bottom: 1px solid var(--sn-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.sn-split-ref-content {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
}

.sn-canvas-workspace {
  flex: 1;
  min-width: 0;
  height: 100%;
  position: relative;
  display: flex;
}

.sn-canvas-viewport {
  flex: 1;
  height: 100%;
  overflow: auto;
  padding: 24px 20px 120px;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.sn-pages-stage {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.sn-pages-stage.sn-pages-horizontal {
  flex-direction: row;
  align-items: flex-start;
}

.sn-page-sheet {
  position: relative;
  background: #FFFFFF;
  box-shadow: 0 6px 26px rgba(0, 0, 0, 0.12);
  border-radius: 4px;
  flex-shrink: 0;
  overflow: hidden;
}

.sn-canvas-bg,
.sn-canvas-live {
  position: absolute;
  left: 0;
  top: 0;
  display: block;
}

.sn-canvas-bg {
  z-index: 1;
}

.sn-rich-layer {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 2;
  transform-origin: top left;
  padding: 82px 52px 56px;
  font-size: 17px;
  line-height: 36px;
  outline: none;
  overflow-y: auto;
  word-break: break-word;
}

.sn-rich-layer.sn-rich-cornell {
  padding: 120px 48px 195px 276px;
}

.sn-rich-layer h1, .sn-rich-layer h2, .sn-rich-layer h3 {
  line-height: 1.35;
  margin: 8px 0;
}

.sn-rich-layer table {
  border-collapse: collapse;
  width: 100%;
  margin: 10px 0;
}

.sn-rich-layer td, .sn-rich-layer th {
  border: 1px solid rgba(120, 120, 135, 0.45);
  padding: 6px 10px;
  min-width: 60px;
}

.sn-todo-check {
  width: 17px;
  height: 17px;
  accent-color: var(--sn-accent);
  vertical-align: middle;
  margin-right: 8px;
  cursor: pointer;
}

.sn-page-objects-layer {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 3;
  transform-origin: top left;
  pointer-events: none;
}

.sn-canvas-live {
  z-index: 4;
}

/* Allow dragging placed images & textboxes when in text, lasso, or textbox mode */
[data-editor-mode="text"] .sn-placed-image,
[data-editor-mode="text"] .sn-floating-textbox,
[data-editor-mode="lasso"] .sn-placed-image,
[data-editor-mode="lasso"] .sn-floating-textbox,
[data-editor-mode="textbox"] .sn-floating-textbox {
  pointer-events: auto;
}

[data-editor-mode="lasso"] .sn-canvas-live {
  cursor: crosshair;
}

.sn-placed-image {
  position: absolute;
  border: 1.5px solid transparent;
  pointer-events: auto;
}

.sn-placed-image:hover,
.sn-floating-textbox:focus-within {
  border-color: var(--sn-blue);
}

.sn-placed-image img {
  width: 100%;
  height: 100%;
  object-fit: fill;
  display: block;
  pointer-events: none;
}

.sn-floating-textbox {
  position: absolute;
  background: rgba(255, 255, 255, 0.04);
  border: 1.5px dashed rgba(3, 129, 254, 0.55);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  pointer-events: auto;
}

.sn-tb-dragbar {
  height: 22px;
  background: rgba(3, 129, 254, 0.12);
  color: var(--sn-blue);
  font-size: 11px;
  font-weight: 700;
  padding: 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: move;
}

.sn-floating-textbox textarea {
  flex: 1;
  width: 100%;
  border: none;
  background: transparent;
  resize: none;
  padding: 6px 8px;
  outline: none;
  font-family: var(--sn-font);
}

.sn-obj-del-btn {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--sn-danger);
  color: #FFFFFF;
  font-size: 13px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.sn-placed-image .sn-obj-del-btn {
  position: absolute;
  top: -10px;
  right: -10px;
  opacity: 0;
  transition: opacity 0.14s;
}

.sn-placed-image:hover .sn-obj-del-btn {
  opacity: 1;
}

.sn-obj-resize-handle {
  position: absolute;
  right: -6px;
  bottom: -6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--sn-blue);
  border: 2px solid #FFFFFF;
  cursor: nwse-resize;
}

.sn-page-bookmark {
  position: absolute;
  top: 0;
  right: 18px;
  z-index: 6;
  color: rgba(130, 130, 145, 0.35);
  padding: 4px;
}

.sn-page-bookmark.active {
  color: var(--sn-accent);
}

.sn-page-num-badge {
  position: absolute;
  right: 14px;
  bottom: 10px;
  z-index: 5;
  font-size: 11px;
  font-weight: 600;
  color: rgba(120, 120, 135, 0.65);
  pointer-events: none;
}

/* Selection Context Floating Bar */
.sn-selection-bar {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--sn-surface);
  border: 1px solid var(--sn-border-strong);
  border-radius: var(--sn-radius-pill);
  padding: 6px 14px;
  box-shadow: var(--sn-shadow-lg);
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 38;
}

/* Voice Recording & Sync Player Pill */
.sn-voice-dock {
  position: absolute;
  right: 18px;
  top: 66px;
  width: 310px;
  max-width: 90vw;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border-strong);
  border-radius: 20px;
  padding: 12px 14px;
  box-shadow: var(--sn-shadow-md);
  z-index: 36;
}

.sn-rec-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--sn-danger);
  animation: snPulse 1.1s infinite;
}

@keyframes snPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.82); }
}

/* Samsung Notes Easy Writing Pad (Bottom Magnified Input Strip) */
.sn-easypad-panel {
  height: 205px;
  background: var(--sn-surface);
  border-top: 2px solid var(--sn-blue);
  display: flex;
  flex-direction: column;
  z-index: 35;
}

.sn-easypad-bar {
  height: 38px;
  padding: 0 14px;
  border-bottom: 1px solid var(--sn-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12.5px;
  font-weight: 700;
}

.sn-easypad-canvas-wrap {
  flex: 1;
  position: relative;
  background: #FFFFFF;
  overflow: hidden;
}

.sn-easypad-advance-zone {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 16%;
  background: rgba(30, 142, 62, 0.09);
  border-left: 1.5px dashed rgba(30, 142, 62, 0.45);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: rgba(30, 142, 62, 0.7);
}

/* Right-Side Page Sorter Drawer */
.sn-pagesorter-drawer {
  width: 236px;
  height: 100%;
  background: var(--sn-surface);
  border-left: 1px solid var(--sn-border);
  display: flex;
  flex-direction: column;
  z-index: 32;
}

.sn-pagesorter-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.sn-sorter-item {
  border: 2px solid var(--sn-border);
  border-radius: 12px;
  padding: 8px;
  background: var(--sn-surface-2);
  cursor: pointer;
}

.sn-sorter-item.active {
  border-color: var(--sn-accent);
}

/* ═══════════════════════════════════════════════════════════════════════
 * ONE UI MODALS, MENUS & TOASTS
 * ═══════════════════════════════════════════════════════════════════════ */
.sn-dropdown-menu {
  position: absolute;
  top: 52px;
  right: 14px;
  min-width: 235px;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border-strong);
  border-radius: 20px;
  padding: 8px;
  box-shadow: var(--sn-shadow-lg);
  z-index: 70;
}

.sn-menu-item {
  width: 100%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  text-align: left;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.sn-menu-item:hover {
  background: var(--sn-surface-hover);
}

.sn-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 500;
  background: rgba(0, 0, 0, 0.48);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.sn-modal {
  width: 100%;
  max-width: 520px;
  max-height: 88dvh;
  background: var(--sn-surface);
  border: 1px solid var(--sn-border);
  border-radius: 26px;
  padding: 24px 26px;
  box-shadow: var(--sn-shadow-lg);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}

.sn-modal h2 {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 700;
}

.sn-modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 20px;
}

.sn-template-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 10px 0 16px;
}

.sn-template-opt {
  padding: 11px 8px;
  border-radius: 14px;
  background: var(--sn-surface-2);
  border: 2px solid transparent;
  font-size: 12.5px;
  font-weight: 600;
  text-align: center;
}

.sn-template-opt.active {
  border-color: var(--sn-accent);
  color: var(--sn-accent);
  background: var(--sn-accent-soft);
}

.sn-toast {
  position: fixed;
  left: 50%;
  bottom: calc(30px + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  background: rgba(28, 28, 32, 0.92);
  color: #FFFFFF;
  padding: 11px 22px;
  border-radius: var(--sn-radius-pill);
  font-size: 13.5px;
  font-weight: 500;
  z-index: 950;
  box-shadow: var(--sn-shadow-md);
  pointer-events: none;
  transition: opacity 0.2s;
}

/* Responsive Tablet Portrait & Mobile Adjustments */
@media (max-width: 920px) {
  .sn-drawer {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    margin-left: 0 !important;
    transform: translateX(0);
    box-shadow: var(--sn-shadow-lg);
  }
  .sn-drawer.collapsed {
    transform: translateX(-105%);
  }
  .sn-fav-pens-dock {
    left: 8px;
    top: auto;
    bottom: 18px;
    flex-direction: row;
    padding: 6px 10px;
  }
  .sn-split-ref-pane {
    display: none !important;
  }
}

@media (max-width: 640px) {
  .sn-hide-mobile {
    display: none !important;
  }
  .sn-browser-hero {
    padding: 16px 18px 4px;
  }
  .sn-browser-hero h1 {
    font-size: 26px;
  }
  .sn-browser-toolbar {
    padding: 6px 14px 10px;
    gap: 6px;
  }
  .sn-toolbar-right {
    flex: 1;
    justify-content: flex-end;
    min-width: 0;
  }
  .sn-search-bar {
    width: auto;
    flex: 1;
    min-width: 110px;
    max-width: 44vw;
    padding: 6px 10px;
  }
  .sn-sort-chip #sortLabelText {
    display: none;
  }
  .sn-notes-scroll {
    padding: 8px 16px 96px;
  }
  .sn-notes-grid.grid_medium {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 12px;
  }
  .sn-editor-title-input {
    width: 115px;
  }
}