/* HotNote2 - Pure JS Notes App */
/* =====================================================================
   Design Tokens — greyscale only
   ===================================================================== */

/* Dark theme (default) */
:root,
html[data-theme="dark"] {
    --color-bg-primary: #0c0c0c;
    --color-bg-secondary: #161616;
    --color-bg-tertiary: #202020;
    --color-border-primary: #2c2c2c;
    --color-border-secondary: #202020;
    --color-text-primary: #e8e8e8;
    --color-text-secondary: #909090;
    --color-text-tertiary: #626262;
    --color-accent-blue: #c8c8c8;
    --color-accent-green: #a0a0a0;
    --color-accent-orange: #b0b0b0;
    --color-accent-red: #787878;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
    --panel-border-radius: 0;
    --header-height: 58px;
    --sidebar-width: 288px;
    --resize-handle-width: 3px;
    /* Syntax token colors — vivid but not garish */
    --tok-keyword: #d070b8;    /* magenta-rose */
    --tok-type:    #d070b8;
    --tok-string:  #58cce0;    /* bright cyan */
    --tok-number:  #b098e8;    /* bright lavender */
    --tok-comment: #666666;    /* mid gray */
    --tok-builtin: #58cce0;
    --tok-operator: #b098e8;
    --color-bg-navbar:  #252525;  /* lighter than secondary — header elevation */
    --color-bg-toolbar: #111111;  /* darker than secondary — sub-toolbar recess */
    --color-btn-bg:     #1e1b28;  /* muted lavender-gray — button face */
    --color-btn-border: #6a5fa0;  /* visible lavender — button edge */
    --btn-border-radius: 5px;
    --shadow-sm:        0 0 0 1px rgba(255,255,255,0.06), 0 1px 3px rgba(0,0,0,0.40);
    --shadow-md:        0 2px 8px rgba(0,0,0,0.35), 0 1px 3px rgba(0,0,0,0.20);
    --shadow-lg:        0 12px 40px rgba(0,0,0,0.55), 0 4px 14px rgba(0,0,0,0.30);
    --highlight-top:    inset 0 1px 0 rgba(255,255,255,0.08);
    --focus-glow:       rgba(232,232,232,0.10);
}

/* Light theme */
html[data-theme="light"] {
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f0f0f0;
    --color-bg-tertiary: #e4e4e4;
    --color-border-primary: #c8c8c8;
    --color-border-secondary: #d8d8d8;
    --color-text-primary: #111111;
    --color-text-secondary: #555555;
    --color-text-tertiary: #aaaaaa;
    --color-accent-blue: #1a1a1a;
    --color-accent-green: #444444;
    --color-accent-orange: #555555;
    --color-accent-red: #222222;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', ui-monospace, monospace;
    --panel-border-radius: 0;
    --header-height: 58px;
    --sidebar-width: 288px;
    --resize-handle-width: 3px;
    /* Syntax token colors — clear and readable on light backgrounds */
    --tok-keyword: #8b0a5a;    /* deep crimson-magenta */
    --tok-type:    #8b0a5a;
    --tok-string:  #0a5a78;    /* deep teal */
    --tok-number:  #3a1888;    /* deep violet */
    --tok-comment: #909090;    /* mid gray */
    --tok-builtin: #0a5a78;
    --tok-operator: #3a1888;
    --color-bg-navbar:  #f9f9f9;  /* lighter than secondary — header elevation */
    --color-bg-toolbar: #e6e6e6;  /* darker than secondary — sub-toolbar recess */
    --color-btn-bg:     #eeeaf6;  /* muted lavender-tint — button face */
    --color-btn-border: #c8bce0;  /* medium lavender-gray — button edge */
    --btn-border-radius: 5px;
    --shadow-sm:        0 1px 3px rgba(0,0,0,0.10), 0 1px 1px rgba(0,0,0,0.06);
    --shadow-md:        0 2px 8px rgba(0,0,0,0.12), 0 1px 3px rgba(0,0,0,0.07);
    --shadow-lg:        0 12px 40px rgba(0,0,0,0.20), 0 4px 14px rgba(0,0,0,0.10);
    --highlight-top:    inset 0 1px 0 rgba(255,255,255,0.70);
    --focus-glow:       rgba(17,17,17,0.08);
}

/* System preference fallback (when no data-theme set yet) */
@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --color-bg-primary: #ffffff;
        --color-bg-secondary: #f0f0f0;
        --color-bg-tertiary: #e4e4e4;
        --color-border-primary: #c8c8c8;
        --color-border-secondary: #d8d8d8;
        --color-text-primary: #111111;
        --color-text-secondary: #555555;
        --color-text-tertiary: #aaaaaa;
        --color-accent-blue: #1a1a1a;
        --color-accent-green: #444444;
        --color-accent-orange: #555555;
        --color-accent-red: #222222;
        --tok-keyword: #8b0a5a;
        --tok-type:    #8b0a5a;
        --tok-string:  #0a5a78;
        --tok-number:  #3a1888;
        --tok-comment: #909090;
        --tok-builtin: #0a5a78;
        --tok-operator: #3a1888;
        --color-bg-navbar:  #f9f9f9;
        --color-bg-toolbar: #e6e6e6;
        --color-btn-bg:     #eeeaf6;
        --color-btn-border: #c8bce0;
        --btn-border-radius: 5px;
        --shadow-sm:        0 1px 3px rgba(0,0,0,0.10), 0 1px 1px rgba(0,0,0,0.06);
        --shadow-md:        0 2px 8px rgba(0,0,0,0.12), 0 1px 3px rgba(0,0,0,0.07);
        --shadow-lg:        0 12px 40px rgba(0,0,0,0.20), 0 4px 14px rgba(0,0,0,0.10);
        --highlight-top:    inset 0 1px 0 rgba(255,255,255,0.70);
        --focus-glow:       rgba(17,17,17,0.08);
    }
}

/* =====================================================================
   Reset & Base
   ===================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 120%; /* global 20% scale — all rem values grow with this */
}

/* Global focus ring — always visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}
/* Wysiwyg handles its own focus */
#wysiwyg:focus-visible { outline: none; }

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    font-size: 0.875rem; /* 14px at default scale, 16.8px at 120% */
    line-height: 1.5;
    color: var(--color-text-primary);
    background: var(--color-bg-primary);
    display: flex;
    flex-direction: column;
}

/* =====================================================================
   Layout
   ===================================================================== */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

header {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    background: var(--color-bg-navbar);
    border-bottom: 1px solid var(--color-border-primary);
    flex-shrink: 0;
    z-index: 100;
}

.logo {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 900;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    white-space: nowrap;
    margin-right: 0.5rem;
    /* Gradient text — dark theme default (cyan → pink) */
    background: linear-gradient(135deg, #00d4ff 0%, #00e5ff 30%, #ff2d96 70%, #e91e8c 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0.5px rgba(255,255,255,0.15);
    color: transparent;
    filter:
        drop-shadow(0 0 6px rgba(255, 45, 150, 0.50))
        drop-shadow(0 0 14px rgba(0, 212, 255, 0.35))
        drop-shadow(0 0 26px rgba(255, 45, 150, 0.25));
}

html[data-theme="light"] .logo {
    background: linear-gradient(135deg, #e91e8c 0%, #ff2d96 30%, #00d4ff 70%, #00b8e6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    -webkit-text-stroke: 0.5px rgba(0,0,0,0.12);
    filter:
        drop-shadow(0 1px 2px rgba(0, 0, 0, 0.30))
        drop-shadow(0 2px 8px rgba(0, 0, 0, 0.18));
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) .logo {
        background: linear-gradient(135deg, #e91e8c 0%, #ff2d96 30%, #00d4ff 70%, #00b8e6 100%);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        -webkit-text-stroke: 0.5px rgba(0,0,0,0.12);
        filter:
            drop-shadow(0 1px 2px rgba(0, 0, 0, 0.30))
            drop-shadow(0 2px 8px rgba(0, 0, 0, 0.18));
    }
}

.header-left {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.header-right {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.25rem;
}

#breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    overflow: hidden;
    font-size: inherit;
    color: var(--color-text-secondary);
    min-width: 0;
    padding: 0 0.5rem;
}

#breadcrumb .crumb {
    cursor: pointer;
    color: var(--color-accent-blue);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 192px;
}

#breadcrumb .crumb:hover,
#breadcrumb .crumb:focus-visible {
    text-decoration: underline;
    outline: none;
    opacity: 0.8;
}

#breadcrumb .crumb-sep {
    color: var(--color-text-tertiary);
    flex-shrink: 0;
}

main {
    display: flex;
    flex: 1;
    min-height: 0;
    overflow: hidden;
}

/* =====================================================================
   Sidebar
   ===================================================================== */
#sidebar {
    width: var(--sidebar-width);
    min-width: 144px;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border-primary);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
    transition: width 0.18s ease;
}

#sidebar.collapsed {
    width: 0 !important;
    min-width: 0;
    border-right: none;
}

#sidebar.collapsed + #resize-handle {
    display: none;
}

#sidebar-toolbar {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.625rem;
    background: var(--color-bg-toolbar);
    border-bottom: 1px solid var(--color-border-primary);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

#file-list {
    flex: 1;
    overflow-y: auto;
    list-style: none;
    padding: 0.25rem 0;
}

.file-entry {
    position: relative;
    user-select: none;
    margin: 0 0.25rem;
}

.file-entry-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.3rem 0.75rem 0.3rem 0.5rem;
    cursor: pointer;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    border-radius: var(--panel-border-radius);
}

.file-entry-row:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

.file-entry.active > .file-entry-row {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    box-shadow: inset 2px 0 0 var(--color-text-primary);
}

.file-entry.disabled > .file-entry-row {
    opacity: 0.38;
    cursor: default;
}
.file-entry.disabled > .file-entry-row:hover {
    background: none;
    color: var(--color-text-secondary);
}

.file-entry-row .icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    color: var(--color-text-tertiary);
}

.file-entry.active > .file-entry-row .icon,
.file-entry-row:hover .icon {
    color: var(--color-text-secondary);
}

.file-entry-row .name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-entry-row .delete-btn {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    padding: 0;
    width: 1.5rem;
    height: 1.5rem;
    line-height: 0;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    border-radius: var(--panel-border-radius);
}

.file-entry-row:hover .delete-btn {
    display: flex;
}

.file-entry-row .delete-btn:hover {
    color: var(--color-text-primary);
    background: var(--color-bg-tertiary);
}

/* Folder toggle chevron */
.folder-toggle {
    background: none;
    border: none;
    padding: 0;
    width: 1rem;
    height: 1rem;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    cursor: pointer;
    transition: transform 0.12s ease;
}

.file-entry.expanded > .file-entry-row .folder-toggle {
    transform: rotate(90deg);
}

/* Indented child list for expanded folders */
.folder-children {
    list-style: none;
    padding: 0;
    padding-left: 1.0rem;
    margin: 0;
}

/* Spacer so file rows align with folder rows (no toggle) */
.file-entry-row .toggle-spacer {
    width: 1rem;
    flex-shrink: 0;
}

.new-file-input-wrap {
    padding: 0.25rem 0.75rem;
    border-bottom: 1px solid var(--color-border-primary);
}

.new-file-input-wrap input {
    width: 100%;
    padding: 0.3rem 0.5rem;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-text-secondary);
    color: var(--color-text-primary);
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    outline: none;
    border-radius: var(--panel-border-radius);
}

.new-file-input-wrap input:focus {
    border-color: var(--color-text-primary);
    outline: 2px solid var(--color-text-primary);
    outline-offset: 1px;
    box-shadow: 0 0 0 3px var(--focus-glow);
}

/* =====================================================================
   Resize Handle
   ===================================================================== */
#resize-handle {
    width: var(--resize-handle-width);
    background: var(--color-border-primary);
    cursor: col-resize;
    flex-shrink: 0;
    position: relative;
    transition: background 0.15s;
}

#resize-handle:hover,
#resize-handle.dragging {
    background: var(--color-accent-blue);
}

/* =====================================================================
   Editor Area
   ===================================================================== */
#editor-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

#mode-toolbar {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.75rem;
    background: var(--color-bg-toolbar);
    border-bottom: 1px solid var(--color-border-primary);
    flex-shrink: 0;
    min-height: 44px;
    position: relative;
    z-index: 1;
}

#mode-toolbar .filename-display {
    margin-left: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: 0.02em;
}

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--color-text-tertiary);
    font-size: 0.8125rem;
    user-select: none;
}

.empty-state h2 {
    font-size: 1rem;
    color: var(--color-text-secondary);
    font-weight: 500;
    letter-spacing: 0.02em;
}

/* Source editor wrapper — takes flex-1 slot, hidden until source mode */
#source-editor-wrap {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: none;
    background: var(--color-bg-primary);
}

/* Line number gutter */
#line-numbers {
    position: absolute;
    top: 0; left: 0; bottom: 0;
    width: 3.25rem;
    padding: 0.75rem 0.5rem 0.75rem 0;
    overflow: hidden;
    pointer-events: none;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-tertiary);
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border-secondary);
    white-space: pre;
    user-select: none;
    z-index: 2;
}

/* Syntax highlight backdrop — sits behind the transparent textarea */
#source-highlight-backdrop {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    margin: 0;
    padding: 0.75rem 0.75rem 0.75rem calc(3.25rem + 0.75rem);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    tab-size: 4;
    white-space: pre-wrap;
    word-break: break-word;
    overflow: hidden;
    pointer-events: none;
    color: var(--color-text-primary);
}

#source-highlight-backdrop code {
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;
    white-space: pre-wrap;
    word-break: break-word;
    tab-size: 4;
}

/* Source editor textarea — transparent overlay on top of backdrop */
#source-editor {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%;
    height: 100%;
    resize: none;
    border: none;
    outline: none;
    background: transparent;
    color: transparent;
    caret-color: var(--color-text-primary);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    padding: 0.75rem 0.75rem 0.75rem calc(3.25rem + 0.75rem);
    overflow: auto;
    tab-size: 4;
    white-space: pre-wrap;
    word-break: break-word;
    z-index: 1;
    display: block;
}

/* Token colors for source editor backdrop */
#source-highlight-backdrop .tok-keyword  { color: var(--tok-keyword); font-weight: 600; }
#source-highlight-backdrop .tok-type     { color: var(--tok-type); }
#source-highlight-backdrop .tok-string   { color: var(--tok-string); }
#source-highlight-backdrop .tok-number   { color: var(--tok-number); }
#source-highlight-backdrop .tok-comment  { color: var(--tok-comment); font-style: italic; }
#source-highlight-backdrop .tok-builtin  { color: var(--tok-builtin); }
#source-highlight-backdrop .tok-operator { color: var(--tok-operator); }

/* WYSIWYG preview */
#wysiwyg {
    flex: 1;
    overflow: auto;
    padding: 1rem 1.5rem;
    background: var(--color-bg-primary);
    display: none;
}

/* Datasheet */
#s3-datasheet {
    flex: 1;
    display: none;
    flex-direction: column;
    overflow: hidden;
}

/* Treeview */
#s3-treeview {
    flex: 1;
    overflow: auto;
    padding: 1rem;
    background: var(--color-bg-primary);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    line-height: 1.6;
    display: none;
}

/* Image viewer */
#image-viewer {
    flex: 1;
    overflow: auto;
    background: var(--color-bg-primary);
    display: none;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem;
}

#image-viewer img {
    max-width: 100%;
    height: auto;
    display: block;
    border: 1px solid var(--color-border-primary);
    box-shadow: var(--shadow-md);
}

/* =====================================================================
   Buttons
   ===================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.3rem;
    padding: 0 0.75rem;
    height: 2rem;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: inherit;
    letter-spacing: 0.02em;
    border: 1px solid var(--color-btn-border);
    background: var(--color-btn-bg);
    color: var(--color-text-primary);
    cursor: pointer;
    border-radius: var(--btn-border-radius);
    white-space: nowrap;
    transition: background 0.12s, border-color 0.12s, color 0.12s, box-shadow 0.12s;
    user-select: none;
    box-shadow: var(--shadow-sm), var(--highlight-top);
}

.btn:hover:not(:disabled) {
    background: var(--color-bg-tertiary);
    border-color: var(--color-btn-border);
    box-shadow: var(--shadow-sm);
}

.btn:active:not(:disabled) {
    background: var(--color-bg-secondary);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.25);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn.active {
    background: var(--color-text-primary);
    border-color: var(--color-text-primary);
    color: var(--color-bg-primary);
    box-shadow: none;
}

/* Mode toolbar buttons — normal button style when active, bottom-edge accent only */
#mode-toolbar .btn.active {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-primary);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-sm), var(--highlight-top), inset 0 -2px 0 var(--color-text-primary);
}

.btn-primary {
    background: var(--color-text-primary);
    border-color: var(--color-text-primary);
    color: var(--color-bg-primary);
    box-shadow: none;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-text-secondary);
    border-color: var(--color-text-secondary);
    color: var(--color-bg-primary);
}

/* Smaller variant — same height, tighter horizontal padding */
.btn-sm {
    padding: 0 0.55rem;
    font-size: 0.75rem;
}

/* Icon-only button — fixed square */
.btn-icon {
    width: 2rem;
    padding: 0;
    line-height: 0;
}

#save-btn.dirty {
    background: var(--color-text-primary);
    border-color: var(--color-text-primary);
    color: var(--color-bg-primary);
}

/* =====================================================================
   Modal (nested data)
   ===================================================================== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgb(0 0 0 / 0.6);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal-overlay.open {
    display: flex;
}

.modal-box {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--panel-border-radius);
    box-shadow: var(--shadow-lg);
    max-width: 960px;
    width: 90vw;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border-primary);
}

.modal-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.modal-body {
    flex: 1;
    overflow: auto;
    padding: 1rem;
}

/* =====================================================================
   WYSIWYG Markdown Styles (from tunnelmesh s3explorer)
   ===================================================================== */
.s3-wysiwyg {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
    font-size: 0.9375rem;
    line-height: 1.75;
    letter-spacing: 0.02em;
    word-spacing: 0.05em;
    white-space: normal;
    overflow-wrap: break-word;
    background: var(--color-bg-primary);
    overflow: auto;
}

/* Constrain reading width and center — padding grows to center at ~72ch */
#wysiwyg.s3-wysiwyg {
    padding: 2rem max(2rem, calc((100% - 72ch) / 2));
}

.s3-wysiwyg:focus { outline: none; }

.s3-wysiwyg h1 {
    font-size: 1.875em; font-weight: 700; letter-spacing: 0.01em;
    border-bottom: 1px solid var(--color-border-primary); padding-bottom: 0.3em;
    margin: 0.75em 0 0.5em; color: var(--tok-keyword);
}
.s3-wysiwyg h2 {
    font-size: 1.5em; font-weight: 600; letter-spacing: 0.06em;
    border-bottom: 1px solid var(--color-border-secondary); padding-bottom: 0.3em;
    margin: 0.9em 0 0.5em; color: var(--tok-keyword);
}
.s3-wysiwyg h3 { font-size: 1.25em; font-weight: 600; margin: 0.8em 0 0.4em; color: var(--tok-keyword); }
.s3-wysiwyg h4 { font-size: 1.1em; font-weight: 600; margin: 0.7em 0 0.4em; color: var(--tok-type); }
.s3-wysiwyg h5 { font-size: 1em; font-weight: 600; margin: 0.6em 0 0.4em; color: var(--tok-comment); }
.s3-wysiwyg h6 { font-size: 0.9em; font-weight: 600; margin: 0.6em 0 0.4em; color: var(--tok-comment); }

.s3-wysiwyg strong { font-weight: 700; color: var(--tok-type); }
.s3-wysiwyg em { font-style: italic; color: var(--tok-string); }
.s3-wysiwyg del { text-decoration: line-through; color: var(--tok-comment); opacity: 0.7; }

.s3-wysiwyg code {
    background: var(--color-bg-tertiary); color: var(--tok-string);
    padding: 0.15rem 0.4rem; border-radius: var(--panel-border-radius); font-family: var(--font-mono);
    font-size: 0.85em; border: 1px solid var(--color-border-secondary);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.12);
}
.s3-wysiwyg pre {
    background: var(--color-bg-tertiary); border: 1px solid var(--color-border-primary);
    border-radius: var(--panel-border-radius); padding: 1rem; margin: 1em 0; overflow-x: auto; line-height: 1.5;
    box-shadow: inset 0 1px 4px rgba(0,0,0,0.18);
}
.s3-wysiwyg pre code { background: none; border: none; padding: 0; color: var(--color-text-primary); }

.s3-wysiwyg ul, .s3-wysiwyg ol { padding-left: 2.5em; margin: 0.8em 0; }
.s3-wysiwyg li { margin: 0.4em 0; line-height: 1.6; }
.s3-wysiwyg ul li::marker { color: var(--tok-operator); }
.s3-wysiwyg ol li::marker { color: var(--tok-number); font-weight: 600; }

.s3-wysiwyg blockquote {
    border-left: 3px solid var(--tok-comment); padding-left: 1.2rem;
    margin: 1em 0; color: var(--tok-comment); font-style: italic;
    background: var(--color-bg-tertiary); padding-top: 0.5em; padding-bottom: 0.5em;
}

.s3-wysiwyg .markdown-alert { padding: 0.75rem 1rem; margin: 1em 0; border-left: 3px solid; font-style: normal; background: var(--color-bg-tertiary); }
.s3-wysiwyg .markdown-alert-title { display: flex; align-items: center; gap: 0.5rem; font-weight: 600; margin-bottom: 0.5rem; letter-spacing: 0.05em; }
.s3-wysiwyg .markdown-alert-icon { fill: currentcolor; flex-shrink: 0; }
.s3-wysiwyg .markdown-alert-note { border-left-color: var(--color-accent-blue); }
.s3-wysiwyg .markdown-alert-note .markdown-alert-title { color: var(--color-accent-blue); }
.s3-wysiwyg .markdown-alert-tip { border-left-color: var(--color-accent-green); }
.s3-wysiwyg .markdown-alert-tip .markdown-alert-title { color: var(--color-accent-green); }
.s3-wysiwyg .markdown-alert-important { border-left-color: var(--color-text-primary); }
.s3-wysiwyg .markdown-alert-important .markdown-alert-title { color: var(--color-text-primary); }
.s3-wysiwyg .markdown-alert-warning { border-left-color: var(--color-accent-orange); }
.s3-wysiwyg .markdown-alert-warning .markdown-alert-title { color: var(--color-accent-orange); }
.s3-wysiwyg .markdown-alert-caution { border-left-color: var(--color-accent-red); }
.s3-wysiwyg .markdown-alert-caution .markdown-alert-title { color: var(--color-accent-red); }

.s3-wysiwyg a { color: var(--tok-builtin); text-decoration: none; border-bottom: 1px dotted var(--tok-builtin); transition: all 0.2s ease; }
.s3-wysiwyg a:hover { border-bottom: 1px solid var(--tok-builtin); background: var(--color-bg-tertiary); }

.s3-wysiwyg img { max-width: 100%; height: auto; margin: 1em 0; border: 1px solid var(--color-border-primary); border-radius: var(--panel-border-radius); }

.s3-wysiwyg table { border-collapse: collapse; width: 100%; margin: 1em 0; border: 1px solid var(--color-border-primary); }
.s3-wysiwyg thead { background: var(--color-bg-secondary); border-bottom: 2px solid var(--tok-keyword); }
.s3-wysiwyg th { padding: 0.75rem; text-align: left; font-weight: 600; color: var(--tok-keyword); border: 1px solid var(--color-border-primary); }
.s3-wysiwyg td { padding: 0.65rem 0.75rem; border: 1px solid var(--color-border-primary); }
.s3-wysiwyg tbody tr:hover { background: var(--color-bg-secondary); }

.s3-wysiwyg hr { border: none; border-top: 2px solid var(--color-border-primary); margin: 1.5em 0; height: 1px; }
.s3-wysiwyg p { margin: 0.8em 0; line-height: 1.75; }
/* Images inside links / mixed inline content — keep as small badges */
.s3-wysiwyg p img {
    display: inline-block;
    vertical-align: middle;
    max-height: 1.4em;
    width: auto;
    border: none;
    margin: 0 0.1rem;
}

/* Standalone images — direct child of <p>, not wrapped in a link — full width */
.s3-wysiwyg p > img {
    display: block;
    width: 100%;
    height: auto;
    max-height: none;
    margin: 0.75em 0;
    border: 1px solid var(--color-border-primary);
}

.img-placeholder {
    display: inline-block;
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    font-style: italic;
    font-family: var(--font-mono);
    padding: 0.1rem 0.3rem;
    border: 1px dashed var(--color-border-primary);
    border-radius: var(--panel-border-radius);
}

/* =====================================================================
   Datasheet Styles (from tunnelmesh s3explorer)
   ===================================================================== */
.s3-datasheet {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--color-bg-primary);
    overflow: hidden;
}

.s3-datasheet-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 1rem;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border-primary);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.s3-datasheet-info { display: inline-flex; gap: 0.5rem; }

.s3-datasheet-container {
    flex: 1;
    overflow: auto;
    position: relative;
}

.s3-datasheet-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    table-layout: auto;
}

.s3-datasheet-table thead {
    position: sticky;
    top: 0;
    background: var(--color-bg-secondary);
    z-index: 10;
}

.s3-datasheet-table th {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border-primary);
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: left;
    white-space: nowrap;
    user-select: none;
}

.s3-datasheet-table td {
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border-primary);
    color: var(--color-text-primary);
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.s3-datasheet-table tbody tr:hover { background: var(--color-bg-tertiary); }

.s3-ds-type-number { text-align: right; }
.s3-ds-type-boolean { text-align: center; }

.s3-ds-null { color: var(--color-text-tertiary); font-style: italic; }
.s3-ds-number { font-family: var(--font-mono); }

.s3-ds-badge { display: inline-block; padding: 0.125rem 0.5rem; border-radius: var(--panel-border-radius); font-size: 0.75rem; font-weight: 600; }
.s3-ds-badge-true { background: var(--color-bg-tertiary); color: var(--color-accent-green); border: 1px solid var(--color-accent-green); }
.s3-ds-badge-false { background: var(--color-bg-tertiary); color: var(--color-accent-red); border: 1px solid var(--color-accent-red); }

.s3-ds-nested { display: inline-flex; align-items: center; gap: 0.25rem; cursor: pointer; color: var(--color-accent-blue); }
.s3-ds-nested:hover { text-decoration: underline; }
.s3-ds-nested-text { font-family: var(--font-mono); font-size: 0.75rem; }
.s3-ds-nested-icon { display: inline-block; vertical-align: middle; margin-left: 0.25rem; color: var(--color-text-secondary); }

.s3-ds-agg-row { background: var(--color-bg-tertiary); border-top: 2px solid var(--color-border-primary); }
.s3-ds-agg-cell { font-size: 0.75rem; color: var(--color-text-secondary); }
.s3-ds-agg { display: flex; flex-direction: column; gap: 0.125rem; }
.s3-ds-agg span { font-family: var(--font-mono); }

.s3-datasheet-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border-primary);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

.s3-nested-json {
    background: var(--color-bg-tertiary);
    padding: 1rem;
    border-radius: var(--panel-border-radius);
    border: 1px solid var(--color-border-primary);
    overflow-x: auto;
    max-height: 400px;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-primary);
    margin: 0;
}

/* =====================================================================
   Tree View Styles (from tunnelmesh s3explorer)
   ===================================================================== */
.s3-treeview {
    flex: 1;
    overflow: auto;
    padding: 1rem;
    background: var(--color-bg-primary);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    line-height: 1.6;
}

.tree-item { margin-left: 0; padding: 0.125rem 0; }
.tree-expandable { cursor: pointer; }

.tree-toggle {
    display: inline-block;
    width: 1rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
}
.tree-toggle:hover { color: var(--color-text-primary); }

.tree-key { color: var(--tok-string); margin-right: 0.25rem; }
.tree-bracket { color: var(--tok-operator); margin: 0 0.25rem; }
.tree-count { color: var(--color-text-tertiary); font-style: italic; font-size: 0.55rem; }

.tree-children {
    margin-left: 1.5rem;
    border-left: 1px solid rgb(139 148 158 / 0.2);
    padding-left: 0.5rem;
}

.tree-string { color: var(--tok-string); }
.tree-number { color: var(--tok-number); }
.tree-boolean { color: var(--tok-keyword); }
.tree-null { color: var(--tok-comment); font-style: italic; }
.tree-undefined { color: var(--tok-comment); font-style: italic; }
.tree-unknown { color: var(--color-accent-red); }

.tree-datasheet-link {
    color: var(--color-accent-blue);
    text-decoration: none;
    cursor: pointer;
    margin-left: 0.5rem;
    font-size: 0.875rem;
    font-variant: small-caps;
    letter-spacing: 0.05em;
}
.tree-datasheet-link:hover { text-decoration: underline; }

/* =====================================================================
   Syntax Highlighting Token Classes
   Use .s3-wysiwyg pre code prefix to beat the color rule on <code>
   ===================================================================== */
.s3-wysiwyg pre code .tok-keyword  { color: var(--tok-keyword); font-weight: 600; }
.s3-wysiwyg pre code .tok-type     { color: var(--tok-type); }
.s3-wysiwyg pre code .tok-string   { color: var(--tok-string); }
.s3-wysiwyg pre code .tok-number   { color: var(--tok-number); }
.s3-wysiwyg pre code .tok-comment  { color: var(--tok-comment); font-style: italic; }
.s3-wysiwyg pre code .tok-builtin  { color: var(--tok-builtin); }
.s3-wysiwyg pre code .tok-operator { color: var(--tok-operator); }

/* =====================================================================
   Code Highlight View (standalone code file viewer)
   ===================================================================== */
.code-highlight-view {
    flex: 1;
    overflow: auto;
    background: var(--color-bg-primary);
    padding: 0;
}

.code-highlight-pre {
    margin: 0;
    padding: 0.75rem 1rem;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    line-height: 1.5;
    white-space: pre;
    min-height: 100%;
    box-sizing: border-box;
    color: var(--color-text-primary);
}

.code-highlight-pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: inherit;
    color: inherit;
}

.code-highlight-pre .tok-keyword  { color: var(--tok-keyword); font-weight: 600; }
.code-highlight-pre .tok-type     { color: var(--tok-type); }
.code-highlight-pre .tok-string   { color: var(--tok-string); }
.code-highlight-pre .tok-number   { color: var(--tok-number); }
.code-highlight-pre .tok-comment  { color: var(--tok-comment); font-style: italic; }
.code-highlight-pre .tok-builtin  { color: var(--tok-builtin); }
.code-highlight-pre .tok-operator { color: var(--tok-operator); }

/* =====================================================================
   Autosave Toggle
   ===================================================================== */
.autosave-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
}
.autosave-toggle input {
    accent-color: var(--color-text-primary);
    cursor: pointer;
}
#autosave-label {
    transition: opacity 0.5s ease, transform 0.5s ease;
    white-space: nowrap;
}
#autosave-label.fade-out {
    opacity: 0;
    transform: translateX(-8px);
}
#autosave-label.hidden { display: none; }

/* =====================================================================
   Drag & Drop
   ===================================================================== */
.file-entry.dragging {
    opacity: 0.35;
}

.file-entry.drag-over > .file-entry-row {
    background: var(--color-bg-tertiary);
    outline: 1px solid var(--color-text-secondary);
    border-radius: var(--panel-border-radius);
}

#file-list.drag-over-list {
    background: var(--color-bg-tertiary);
    outline: 1px inset var(--color-border-primary);
}

/* =====================================================================
   Mobile
   ===================================================================== */
@media (max-width: 720px) {
    header {
        padding: 0.5rem 0.4rem;
        gap: 0.1rem;
    }

    .header-left,
    .header-right {
        gap: 0.1rem;
    }

    .logo {
        display: none;
    }

    .autosave-toggle {
        display: none;
    }

    #breadcrumb {
        padding: 0 0.15rem;
    }
}