/* ============================================================
   FireWeb — Core Layout & Dark Theme
   Modeled after Adobe Fireworks' professional chrome
   ============================================================ */

:root {
    /* — Color Palette (Fireworks Dark Chrome) — */
    --bg-darkest: #1a1a1a;
    --bg-dark: #222222;
    --bg-medium: #2a2a2a;
    --bg-panel: #2d2d2d;
    --bg-panel-header: #333333;
    --bg-input: #1e1e1e;
    --bg-hover: #3a3a3a;
    --bg-active: #4a4a4a;
    --bg-selected: #1a5fb4;
    --bg-canvas-area: #404040;

    --border-dark: #1a1a1a;
    --border-medium: #3a3a3a;
    --border-light: #4a4a4a;
    --border-focus: #5294e2;

    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --text-bright: #ffffff;
    --text-accent: #5294e2;

    --accent-primary: #5294e2;
    --accent-hover: #6aabf5;
    --accent-active: #3d7bc7;
    --accent-danger: #e74c3c;
    --accent-success: #27ae60;
    --accent-warning: #f39c12;

    /* — Sizing — */
    --menu-bar-height: 28px;
    --doc-tabs-height: 28px;
    --tools-panel-width: 42px;
    --right-panel-width: 240px;
    --properties-panel-height: 180px;
    --status-bar-height: 22px;
    --ruler-size: 20px;

    /* — Typography — */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 10px;
    --font-size-sm: 11px;
    --font-size-base: 12px;
    --font-size-md: 13px;
    --font-size-lg: 14px;

    /* — Spacing — */
    --space-xxs: 2px;
    --space-xs: 4px;
    --space-sm: 6px;
    --space-md: 8px;
    --space-lg: 12px;
    --space-xl: 16px;
    --space-xxl: 24px;

    /* — Effects — */
    --shadow-panel: 0 2px 8px rgba(0,0,0,0.4);
    --shadow-dropdown: 0 4px 16px rgba(0,0,0,0.5);
    --shadow-dialog: 0 8px 32px rgba(0,0,0,0.6);
    --transition-fast: 100ms ease;
    --transition-normal: 200ms ease;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 6px;
}

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

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-darkest);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    user-select: none;
    cursor: default;
}

/* ---- App Shell Layout ---- */
#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    width: 100vw;
}

#menu-bar {
    height: var(--menu-bar-height);
    min-height: var(--menu-bar-height);
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-dark);
    z-index: 100;
}

/* ---- Document Tabs ---- */
#doc-tabs-bar {
    height: var(--doc-tabs-height);
    min-height: var(--doc-tabs-height);
    background: var(--bg-darkest);
    border-bottom: 1px solid var(--border-dark);
    display: flex;
    align-items: stretch;
    overflow-x: auto;
    overflow-y: hidden;
    z-index: 90;
}

#doc-tabs-bar::-webkit-scrollbar { height: 0; }

.doc-tab {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0 var(--space-lg);
    background: var(--bg-dark);
    border-right: 1px solid var(--border-dark);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    white-space: nowrap;
    min-width: 0;
    max-width: 180px;
    transition: background var(--transition-fast), color var(--transition-fast);
    position: relative;
}

.doc-tab:hover { background: var(--bg-medium); color: var(--text-primary); }

.doc-tab.active {
    background: var(--bg-panel);
    color: var(--text-bright);
    border-bottom: 2px solid var(--accent-primary);
}

.doc-tab-name {
    overflow: hidden;
    text-overflow: ellipsis;
}

.doc-tab-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    font-size: 14px;
    line-height: 1;
    padding: 0;
    flex-shrink: 0;
}

.doc-tab-close:hover {
    background: var(--accent-danger);
    color: var(--text-bright);
}

.doc-tab-add {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    min-width: 28px;
    background: transparent;
    border: none;
    border-right: 1px solid var(--border-dark);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
}

.doc-tab-add:hover { color: var(--text-primary); background: var(--bg-hover); }

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

#tools-panel {
    width: var(--tools-panel-width);
    min-width: var(--tools-panel-width);
    background: var(--bg-panel);
    border-right: 1px solid var(--border-dark);
    z-index: 50;
    overflow-y: auto;
    overflow-x: hidden;
}

#tools-panel::-webkit-scrollbar {
    width: 0;
}

#canvas-area {
    flex: 1;
    display: grid;
    /* ruler-corner | ruler-h */
    /* ruler-v     | viewport */
    /* status-bar  | status   */
    grid-template-columns: var(--ruler-size) 1fr;
    grid-template-rows: var(--ruler-size) 1fr var(--status-bar-height);
    grid-template-areas:
        "corner  rulerh"
        "rulerv  viewport"
        "status  status";
    background: var(--bg-canvas-area);
    min-width: 0;
    position: relative;
    overflow: hidden;
}

#canvas-area.rulers-hidden {
    grid-template-columns: 0 1fr;
    grid-template-rows: 0 1fr var(--status-bar-height);
}

#canvas-area.rulers-hidden #ruler-corner,
#canvas-area.rulers-hidden #ruler-horizontal,
#canvas-area.rulers-hidden #ruler-vertical {
    display: none;
}

/* Rulers */
#ruler-corner {
    grid-area: corner;
    background: var(--bg-dark);
    border-right: 1px solid var(--border-dark);
    border-bottom: 1px solid var(--border-dark);
}

#ruler-horizontal {
    grid-area: rulerh;
    background: var(--bg-dark);
    border-bottom: 1px solid var(--border-dark);
    overflow: hidden;
    position: relative;
    cursor: pointer;
}

#ruler-vertical {
    grid-area: rulerv;
    background: var(--bg-dark);
    border-right: 1px solid var(--border-dark);
    overflow: hidden;
    position: relative;
    cursor: pointer;
}

.ruler-canvas {
    position: absolute;
    top: 0;
    left: 0;
}

#canvas-viewport {
    grid-area: viewport;
    position: relative;
    overflow: hidden;
}

#canvas-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    cursor: crosshair;
}

#main-canvas,
#overlay-canvas {
    position: absolute;
    top: 0;
    left: 0;
}

#overlay-canvas {
    pointer-events: none;
    z-index: 10;
}

/* Guides */
.guide {
    position: absolute;
    z-index: 5;
    pointer-events: none;
}

.guide-h {
    left: 0;
    right: 0;
    height: 1px;
    background: #00ffff;
    cursor: ns-resize;
    pointer-events: auto;
}

.guide-v {
    top: 0;
    bottom: 0;
    width: 1px;
    background: #00ffff;
    cursor: ew-resize;
    pointer-events: auto;
}

.guide-drag-preview {
    position: fixed;
    z-index: 9999;
    opacity: 0.6;
}

.guide-drag-preview.guide-h {
    left: 0;
    right: 0;
    height: 1px;
    background: #00ffff;
}

.guide-drag-preview.guide-v {
    top: 0;
    bottom: 0;
    width: 1px;
    background: #00ffff;
}

#canvas-status-bar {
    grid-area: status;
    height: var(--status-bar-height);
    min-height: var(--status-bar-height);
    background: var(--bg-dark);
    border-top: 1px solid var(--border-dark);
    display: flex;
    align-items: center;
    padding: 0 var(--space-md);
    gap: var(--space-xl);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

#canvas-status-bar span {
    white-space: nowrap;
}

#status-zoom {
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 3px;
}
#status-zoom:hover {
    background: var(--bg-hover);
    color: var(--text-bright);
}

/* Zoom popup menu */
.zoom-popup {
    position: absolute;
    background: var(--bg-panel);
    border: 1px solid var(--border-dark);
    border-radius: 4px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.5);
    padding: 4px 0;
    z-index: 10000;
    min-width: 140px;
}
.zoom-popup-item {
    padding: 5px 16px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
}
.zoom-popup-item:hover {
    background: var(--accent);
    color: #fff;
}
.zoom-popup-sep {
    height: 1px;
    background: var(--border-dark);
    margin: 3px 0;
}

/* Right-click context menu */
.context-menu {
    position: absolute;
    background: var(--bg-panel);
    border: 1px solid var(--border-dark);
    border-radius: 4px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.55);
    padding: 4px 0;
    z-index: 10001;
    min-width: 160px;
}
.context-menu-item {
    padding: 5px 16px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    white-space: nowrap;
    display: flex;
    justify-content: space-between;
    gap: 24px;
}
.context-menu-item:hover {
    background: var(--accent);
    color: #fff;
}
.context-menu-item.disabled {
    color: var(--text-muted);
    pointer-events: none;
}
.context-menu-item .shortcut {
    color: var(--text-muted);
    font-size: 11px;
}
.context-menu-item:hover .shortcut {
    color: rgba(255,255,255,0.7);
}
.context-menu-sep {
    height: 1px;
    background: var(--border-dark);
    margin: 3px 0;
}

#right-panels {
    width: var(--right-panel-width);
    min-width: var(--right-panel-width);
    background: var(--bg-panel);
    border-left: 1px solid var(--border-dark);
    display: flex;
    flex-direction: column;
    z-index: 50;
    overflow: hidden;
}

#layers-panel {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#pages-panel {
    height: 120px;
    min-height: 120px;
    border-top: 1px solid var(--border-dark);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

#properties-panel {
    height: var(--properties-panel-height);
    min-height: var(--properties-panel-height);
    background: var(--bg-panel);
    border-top: 1px solid var(--border-dark);
    z-index: 50;
    overflow: hidden;
}

/* ---- Utility Classes ---- */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
}

/* ---- Panel Shared Styles ---- */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 24px;
    min-height: 24px;
    padding: 0 var(--space-md);
    background: var(--bg-panel-header);
    border-bottom: 1px solid var(--border-dark);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.panel-header-actions {
    display: flex;
    gap: var(--space-xxs);
}

.panel-body {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.panel-body::-webkit-scrollbar {
    width: 6px;
}

.panel-body::-webkit-scrollbar-track {
    background: transparent;
}

.panel-body::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 3px;
}

.panel-body::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

.panel-footer {
    display: flex;
    align-items: center;
    gap: var(--space-xxs);
    padding: var(--space-xs) var(--space-md);
    border-top: 1px solid var(--border-dark);
    background: var(--bg-panel);
}

/* ---- Common Form Elements ---- */
.fw-input {
    background: var(--bg-input);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: 2px 4px;
    outline: none;
    transition: border-color var(--transition-fast);
    width: 100%;
}

.fw-input:focus {
    border-color: var(--border-focus);
}

.fw-input-sm {
    width: 48px;
    text-align: center;
    padding: 1px 2px;
}

.fw-input-md {
    width: 64px;
}

.fw-select {
    background: var(--bg-input);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: 2px 4px;
    outline: none;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.fw-select:focus {
    border-color: var(--border-focus);
}

.fw-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-medium);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: 3px 10px;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.fw-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-light);
}

.fw-btn:active {
    background: var(--bg-active);
}

.fw-btn-primary {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: var(--text-bright);
}

.fw-btn-primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}

.fw-btn-primary:active {
    background: var(--accent-active);
}

.fw-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0;
}

.fw-icon-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.fw-icon-btn:active {
    background: var(--bg-active);
}

.fw-icon-btn svg {
    width: 14px;
    height: 14px;
}

.fw-icon-btn.active,
.props-biu-toggle.active {
    background: var(--accent-primary);
    color: var(--text-bright);
}

.props-biu-toggle {
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    font-family: var(--font-family);
}

/* ---- Label Row ---- */
.fw-prop-row {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xxs) 0;
}

.fw-prop-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    min-width: 18px;
    text-align: right;
    flex-shrink: 0;
}

/* ---- Color Swatch (inline) ---- */
.fw-color-swatch {
    width: 20px;
    height: 20px;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: border-color var(--transition-fast);
}

.fw-color-swatch:hover {
    border-color: var(--border-light);
}

.fw-color-swatch-inner {
    width: 100%;
    height: 100%;
    border-radius: inherit;
}

/* Checkerboard pattern for transparency */
.fw-color-swatch-transparent {
    background-image:
        linear-gradient(45deg, #808080 25%, transparent 25%),
        linear-gradient(-45deg, #808080 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #808080 75%),
        linear-gradient(-45deg, transparent 75%, #808080 75%);
    background-size: 8px 8px;
    background-position: 0 0, 0 4px, 4px -4px, -4px 0;
}

/* ---- Separator ---- */
.fw-separator {
    height: 1px;
    background: var(--border-dark);
    margin: var(--space-xs) 0;
}

.fw-separator-v {
    width: 1px;
    height: 16px;
    background: var(--border-dark);
    margin: 0 var(--space-xs);
    flex-shrink: 0;
}

/* ---- Dialog Overlay ---- */
#dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: transparent;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

#dialog-overlay > * {
    pointer-events: auto;
}

/* ---- Tooltips ---- */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 8px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-darkest);
    color: var(--text-primary);
    font-size: var(--font-size-xs);
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
    z-index: 200;
    box-shadow: var(--shadow-dropdown);
    border: 1px solid var(--border-medium);
}

[data-tooltip]:hover::after {
    opacity: 1;
}

/* ---- Slider ---- */
.fw-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: var(--bg-input);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.fw-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.fw-slider::-webkit-slider-thumb:hover {
    background: var(--text-bright);
}

/* ---- Checkbox ---- */
.fw-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.fw-checkbox input[type="checkbox"] {
    width: 12px;
    height: 12px;
    accent-color: var(--accent-primary);
    cursor: pointer;
}

/* ---- Animations ---- */
@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(-10px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}

/* ---- Text Editor Overlay ---- */
.text-edit-overlay {
    position: absolute;
    z-index: 100;
    border: 1px solid var(--accent-primary);
    background: transparent;
    padding: 0;
    margin: 0;
    resize: none;
    outline: none;
    overflow: hidden;
    box-sizing: border-box;
    white-space: pre-wrap;
    word-wrap: break-word;
    cursor: text;
}

/* ---- Font Dropdown ---- */
.props-font-family {
    font-size: calc(var(--font-size-sm) * 1.2) !important;
}
.props-font-family option {
    padding: 2px 4px;
    font-size: calc(var(--font-size-sm) * 1.2);
}

/* ---- Drop Highlight ---- */
#canvas-container.drop-highlight::after {
    content: 'Drop Image Here';
    position: absolute;
    inset: 0;
    background: rgba(82, 148, 226, 0.15);
    border: 3px dashed var(--accent-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--accent-primary);
    font-weight: 600;
    pointer-events: none;
    z-index: 200;
    border-radius: 4px;
}

#doc-tabs-bar.drop-highlight {
    background: rgba(82, 148, 226, 0.2);
    outline: 2px dashed var(--accent-primary);
    outline-offset: -2px;
}

/* ---- Export Dialog ---- */
.fw-dialog-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}
.fw-dialog-row label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    min-width: 48px;
}
.fw-dialog-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--border-medium);
    margin-top: 4px;
}
.fw-btn {
    padding: 4px 14px;
    border: 1px solid var(--border-medium);
    border-radius: 3px;
    background: var(--bg-medium);
    color: var(--text-primary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-family: var(--font-family);
}
.fw-btn:hover {
    background: var(--bg-hover);
}
.fw-btn-primary {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: #fff;
    font-weight: 600;
}
.fw-btn-primary:hover {
    background: var(--accent-hover);
}