/* apps/qutemaster/css/editor.css */
/* Google Fonts removed - using system-ui */
:root {
    --qm-bg-base: #0e1015;
    --qm-bg-surface: #161922;
    --qm-bg-surface-light: #212533;
    --qm-bg-surface-hover: #2a2f40;
    --qm-bg-hover: rgba(255, 255, 255, 0.06);
    --qm-border-color: rgba(255, 255, 255, 0.06);
    --qm-text-main: #e2e4e9;
    --qm-text-body: #c8ccd6;
    --qm-text-muted: #8b92a5;

    --qm-accent: #5e6ad2;
    --qm-accent-light: #8b96f5;
    --qm-accent-hover: #4a54b3;
    --qm-accent-dim: rgba(94, 106, 210, 0.12);
    --qm-neon-glow: 0 0 16px rgba(94, 106, 210, 0.4);
    --qm-gradient-card: linear-gradient(135deg, rgba(94, 106, 210, 0.08), rgba(139, 150, 245, 0.04));

    --qm-danger: #ea4e4e;
    --qm-success: #2ea043;
    --qm-warning: #e09f3e;

    --qm-panel-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05), inset 0 0 0 1px rgba(255, 255, 255, 0.02), 0 8px 24px rgba(0, 0, 0, 0.4);

    --qm-header-h: 48px;
    --qm-timeline-toolbar-h: 36px;
    --qm-track-h: 64px;
    --qm-left-panel-w: 340px;
    --qm-right-panel-w: 320px;

    --font-primary: system-ui,-apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body.qm-dark-theme {
    margin: 0;
    padding: 0;
    background-color: var(--qm-bg-base);
    color: var(--qm-text-main);
    font-family: var(--font-primary);
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Base Components */
* {
    box-sizing: border-box;
}

::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    border: 1px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 100, 255, 0.3);
    border: 1px solid transparent;
    background-clip: padding-box;
}

/* Base Input Resets for Dark Theme */
select,
input,
textarea {
    background-color: var(--qm-bg-surface-light);
    color: var(--qm-text-main);
    border: 1px solid var(--qm-border-color);
    font-family: inherit;
    border-radius: 4px;
    padding: 4px 8px;
    outline: none;
    transition: all 0.2s ease;
}

option {
    background-color: var(--qm-bg-surface-light);
    color: var(--qm-text-main);
}

select:focus,
input:focus,
textarea:focus {
    border-color: var(--qm-accent);
    box-shadow: var(--qm-neon-glow);
}

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

.qm-btn {
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.25s cubic-bezier(0.2, 0.8, 0.2, 1);
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.qm-btn:active {
    transform: scale(0.96);
}

.qm-btn-primary {
    background: var(--qm-accent);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.qm-btn-primary:hover {
    background: var(--qm-accent-hover);
    box-shadow: 0 0 15px rgba(94, 106, 210, 0.5);
    transform: translateY(-1px);
}

.qm-btn-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--qm-text-muted);
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.qm-btn-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--qm-text-main);
    transform: scale(1.08);
}

.qm-btn-icon:active {
    transform: scale(0.92);
}

.qm-btn-icon.active {
    background: rgba(94, 106, 210, 0.2);
    color: var(--qm-accent-light);
    box-shadow: inset 0 0 0 1px rgba(94, 106, 210, 0.5);
}

/* --- Modals/Overlays --- */
@keyframes qm-fade-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes qm-slide-up {
    from {
        opacity: 0;
        transform: translateY(15px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.qm-settings-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 9000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: qm-fade-in 0.2s ease-out forwards;
}

.qm-settings-content {
    background: rgba(22, 25, 34, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: qm-slide-up 0.3s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.qm-settings-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--qm-border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.qm-settings-header h3 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 500;
}

/* Header Action Button (compact toolbar buttons) */
.qm-btn-header-action {
    border: 1px solid var(--qm-border-color);
    border-radius: 6px;
    font-size: 0.78rem;
    padding: 4px 10px;
    color: var(--qm-text-muted);
    white-space: nowrap;
    transition: all 0.2s;
    gap: 4px;
}

.qm-btn-header-action:hover {
    background: var(--qm-bg-surface-light);
    border-color: var(--qm-accent);
    color: var(--qm-text-main);
}

/* Layout Container */
.qm-app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Header */
.qm-header {
    height: var(--qm-header-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    background: var(--qm-bg-surface);
    border-bottom: 1px solid var(--qm-border-color);
    flex-shrink: 0;
    gap: 8px;
}

.qm-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.qm-header-right {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    justify-content: flex-end;
    min-width: 0;
}

.qm-back-btn {
    font-size: 1.1rem;
    color: var(--qm-text-muted);
    text-decoration: none;
}

.qm-logo {
    font-weight: 800;
    font-size: 1.1rem;
    letter-spacing: 1px;
    background: linear-gradient(90deg, #6464ff, #ff64ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 24px;
}

.qm-menu {
    display: flex;
    gap: 8px;
}

.qm-menu-item {
    font-size: 0.85rem;
    padding: 6px 12px;
    color: var(--qm-text-muted);
    border-radius: 4px;
}

.qm-menu-item:hover,
.qm-menu-item.active {
    background: var(--qm-bg-surface-light);
    color: var(--qm-text-main);
}

.qm-user-profile img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--qm-border-color);
}

/* Workspace Grid */
.qm-workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--qm-bg-base);
}

.qm-upper-workspace {
    flex: 1;
    display: flex;
    min-height: 0;
    padding: 6px;
    gap: 0;
    overflow: hidden;
}

/* Phase 1: Draggable Resizers */
.qm-resizer {
    background: transparent;
    transition: background 0.2s;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qm-resizer::after {
    content: '';
    display: block;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    transition: background 0.2s, transform 0.2s;
}

.qm-resizer-horizontal {
    width: 10px;
    cursor: col-resize;
    margin: 0 -2px;
}

.qm-resizer-horizontal::after {
    width: 2px;
    height: 40px;
}

.qm-resizer:hover::after,
.qm-resizer.resizing::after {
    background: var(--qm-accent);
    transform: scaleX(2);
}

.qm-panel {
    background: rgba(22, 25, 34, 0.6);
    /* Phase V (VANGUARD): Glassmorphism */
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    /* Slightly rounder for premium feel */
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    overflow: hidden;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.08);
    /* More subtle border */
}

.qm-media-panel {
    flex: 0 0 350px;
    width: 350px;
    min-width: 250px;
    max-width: 600px;
}

.qm-preview-panel {
    flex: 1 1 50%;
    min-width: 400px;
}

.qm-properties-panel {
    flex: 0 0 300px;
    width: 300px;
    min-width: 250px;
    max-width: 500px;
}

/* Phase 1: Cinema Mode Fullscreen Overrides */
.qm-preview-panel.in-cinema-mode {
    border-radius: 0 !important;
    border: none !important;
    box-shadow: none !important;
    max-width: none !important;
    background: #000 !important;
}

.qm-preview-panel.in-cinema-mode .qm-player-container {
    height: calc(100vh - 50px) !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

@keyframes qm-panel-content-fade {
    from {
        opacity: 0;
        transform: translateY(5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.qm-panel-header {
    min-height: 40px;
    height: auto;
    background: var(--qm-bg-surface);
    border-bottom: 1px solid var(--qm-border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 0.9rem;
    font-weight: 500;
}

.qm-panel-header h3 {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
}

.qm-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

/* Media Panel (Left) */
.qm-media-panel {
    flex: 0 0 var(--qm-left-panel-w);
    min-width: 240px;
    max-width: 360px;
}

.qm-tabs {
    display: flex;
    width: 100%;
    gap: 4px;
    overflow-x: auto;
    white-space: nowrap;
    scrollbar-width: none;
    /* Firefox */
}

/* Force properties panel tabs to wrap so all options are visible as a menu */
.qm-properties-panel .qm-tabs {
    flex-wrap: wrap;
    white-space: normal;
    overflow-x: visible;
    padding: 6px;
    background: rgba(0, 0, 0, 0.2);
}

.qm-properties-panel .qm-tab {
    flex: 1 1 calc(33.33% - 8px);
    padding: 6px 4px;
    font-size: 0.72rem;
    border-radius: 4px;
    background: var(--qm-bg-base);
    border: 1px solid transparent;
}

.qm-properties-panel .qm-tab.active {
    background: rgba(100, 100, 255, 0.1);
    border-color: var(--qm-accent);
    color: var(--qm-text-main);
    box-shadow: var(--qm-neon-glow);
}

.qm-tabs::-webkit-scrollbar {
    display: none;
    /* Chrome/Safari - hide scrollbar for cleaner UI */
}

.qm-tab {
    flex: 0 0 auto;
    padding: 10px 12px;
    font-size: 0.82rem;
    color: var(--qm-text-muted);
    background: transparent;
    border-bottom: 2px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.qm-tab.active {
    color: var(--qm-text-main);
    border-bottom-color: var(--qm-accent);
}

.qm-upload-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 32px 16px;
    border: 2px dashed var(--qm-border-color);
    border-radius: 8px;
    color: var(--qm-text-muted);
    cursor: pointer;
    transition: all 0.2s;
    background: rgba(255, 255, 255, 0.02);
}

.qm-upload-box:hover {
    border-color: var(--qm-accent);
    color: var(--qm-accent-light);
    background: rgba(100, 100, 255, 0.05);
}

.qm-upload-box i {
    font-size: 2rem;
}

/* Media Pool Items */
.qm-media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
    align-content: start;
}

.qm-media-item {
    background: var(--qm-bg-surface);
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid transparent;
    cursor: grab;
    transition: border-color 0.2s;
}

.qm-media-item:hover,
.qm-media-item.selected {
    border-color: var(--qm-accent);
}

.qm-media-thumb {
    width: 100%;
    aspect-ratio: 16/9;
    background: #000;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.qm-media-thumb video,
.qm-media-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.qm-media-duration {
    position: absolute;
    bottom: 4px;
    right: 4px;
    background: rgba(0, 0, 0, 0.7);
    padding: 2px 4px;
    border-radius: 2px;
    font-size: 0.7rem;
    color: white;
}

.qm-media-name {
    padding: 8px;
    font-size: 0.75rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--qm-text-muted);
}

/* Preview Panel (Center) */
.qm-preview-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: black;
    min-width: 280px;
}

.qm-player-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

#qm-preview-canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    background: #000;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.qm-player-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
    background: rgba(0, 0, 0, 0.4);
}

.qm-player-overlay i {
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.8);
    transform: scale(0.5);
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.qm-player-overlay.show {
    opacity: 1;
}

.qm-player-overlay.show i {
    transform: scale(1);
}

.qm-player-controls {
    height: 48px;
    background: var(--qm-bg-surface);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    border-top: 1px solid var(--qm-border-color);
    flex-shrink: 0;
}

.qm-timecode {
    font-family: 'Cascadia Code','Fira Code',Consolas, 'Courier New', monospace;
    font-size: 1.1rem;
    color: var(--qm-accent-light);
    letter-spacing: 1px;
}

.qm-transport {
    display: flex;
    gap: 8px;
    align-items: center;
}

.qm-play-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--qm-text-main);
    color: var(--qm-bg-base);
}

.qm-play-btn:hover {
    background: white;
    transform: scale(1.05);
}

/* Properties Panel (Right) */
.qm-properties-panel {
    flex: 0 0 var(--qm-right-panel-w);
    min-width: 210px;
    max-width: 320px;
}

.qm-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--qm-text-muted);
    text-align: center;
    gap: 16px;
    padding: 32px;
}

.qm-empty-state i {
    font-size: 3rem;
    opacity: 0.5;
}

/* Timeline Container (Bottom) */
.qm-timeline-container {
    height: clamp(160px, 28vh, 350px);
    min-height: 140px;
    max-height: 50vh;
    background: var(--qm-bg-surface);
    display: flex;
    flex-direction: column;
    margin: 0 6px 6px 6px;
    border-radius: 8px;
    box-shadow: var(--qm-panel-shadow);
    border: 1px solid var(--qm-border-color);
    overflow: hidden;
    resize: vertical;
    flex-shrink: 0;
}

.qm-timeline-toolbar {
    height: var(--qm-timeline-toolbar-h);
    background: var(--qm-bg-surface);
    border-bottom: 1px solid var(--qm-border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 24px;
}

.qm-tools-group {
    display: flex;
    gap: 4px;
    padding-right: 16px;
    border-right: 1px solid var(--qm-border-color);
}

.qm-timeline-zoom {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--qm-text-muted);
    margin-left: auto;
}

/* Base customized slider */
.qm-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 150px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
}

.qm-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--qm-accent);
    cursor: pointer;
}

/* Phase V (VANGUARD): Premium Forms */
.qm-input {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--qm-text-main);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 0.85rem;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.5);
    width: 100%;
}

.qm-input:hover {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.03);
}

.qm-input:focus {
    border-color: var(--qm-accent-light);
    box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.2), inset 0 1px 3px rgba(0, 0, 0, 0.5);
    outline: none;
}

/* Base custom native range slider styling everywhere */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    outline: none;
    border: none;
    margin: 8px 0;
}

input[type="range"]:focus {
    box-shadow: none;
    /* remove global focus glow for sliders */
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--qm-accent-light);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(94, 106, 210, 0.5);
    transition: transform 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.3);
    background: #ffffff;
    box-shadow: 0 0 15px rgba(139, 150, 245, 0.8);
}

/* Timeline Body */
.qm-timeline-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    position: relative;
}

.qm-track-headers {
    width: 150px;
    background: var(--qm-bg-surface-light);
    border-right: 1px solid var(--qm-border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
    padding-top: 24px;
    flex-shrink: 0;
    /* offset for ruler */
}

.qm-track-header {
    width: 150px;
    background: var(--qm-bg-surface-light);
    border-right: 1px solid var(--qm-border-color);
    border-bottom: 1px solid var(--qm-border-color);
    padding: 4px 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    z-index: 2;
    box-sizing: border-box;
}

.qm-track-title {
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 4px;
    color: var(--qm-text-main);
}

.qm-track-controls {
    display: flex;
    gap: 4px;
}

.qm-track-controls i {
    cursor: pointer;
}

.qm-track-controls i:hover {
    color: var(--qm-text-main);
}

/* Timeline Track Area */
.qm-track-area {
    flex: 1;
    position: relative;
    overflow-x: auto;
    overflow-y: hidden;
    background: #151522;
    /* slightly different from base for contrast */
}

.qm-ruler {
    height: 24px;
    background: var(--qm-bg-surface);
    border-bottom: 1px solid var(--qm-border-color);
    position: sticky;
    top: 0;
    z-index: 5;
    width: max-content;
    min-width: 100%;
}

.qm-tracks-container {
    display: flex;
    flex-direction: column;
    min-width: 100%;
    width: max-content;
    /* expands based on content */
    background: repeating-linear-gradient(90deg, transparent, transparent 99px, rgba(255, 255, 255, 0.02) 100px);
}

.qm-track-row {
    height: var(--qm-track-h);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    position: relative;
}

/* Clips */
.qm-clip {
    position: absolute;
    top: 4px;
    height: calc(var(--qm-track-h) - 8px);
    background: #2a3b4c;
    border-radius: 4px;
    border: 1px solid #4a6b8c;
    overflow: hidden;
    cursor: grab;
    display: flex;
    align-items: center;
    padding: 0 8px;
    font-size: 0.75rem;
    color: white;
    user-select: none;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.qm-clip.selected {
    border-color: #fff;
    box-shadow: 0 0 0 1px #fff;
    z-index: 2;
}

.qm-clip-audio {
    background: #204030;
    border-color: #306048;
}

/* Playhead */
.qm-playhead {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--qm-danger);
    z-index: 20;
    left: 10px;
    /* pixel value updated by js */
    pointer-events: none;
    /* Let js handle drag via dedicated hit area if needed */
}

.qm-playhead-cap {
    position: absolute;
    top: 0;
    left: -6px;
    width: 14px;
    height: 14px;
    background: var(--qm-danger);
    clip-path: polygon(0 0, 100% 0, 100% 50%, 50% 100%, 0 50%);
    cursor: ew-resize;
    pointer-events: auto;
}

/* AI Director Modal */
.qm-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.qm-modal-overlay.show {
    display: flex;
}

.qm-modal-content {
    background: rgba(22, 25, 34, 0.85);
    /* Phase V (VANGUARD) */
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
}

.qm-modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--qm-border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.qm-modal-header h2 {
    margin: 0;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--qm-text-main);
}

.qm-modal-header h2 i {
    color: var(--qm-accent-light);
}

.qm-modal-body {
    padding: 24px;
}

.qm-ai-step {
    display: none;
    flex-direction: column;
    gap: 16px;
}

.qm-ai-step.active {
    display: flex;
}

.qm-ai-step h3 {
    margin: 0;
    color: var(--qm-text-main);
    font-size: 1.1rem;
}

.qm-ai-textarea {
    width: 100%;
    min-height: 120px;
    background: var(--qm-bg-base);
    border: 1px solid var(--qm-border-color);
    border-radius: 6px;
    padding: 12px;
    color: var(--qm-text-main);
    font-family: inherit;
    resize: vertical;
}

.qm-ai-textarea:focus {
    outline: none;
    border-color: var(--qm-accent);
}

.qm-ai-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    margin-top: 16px;
}

.qm-ai-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 32px 0;
    color: var(--qm-accent-light);
}

.qm-ai-loading i {
    font-size: 2.5rem;
}

/* AI Storyboard Grid UI */
.qm-storyboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 16px;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 8px;
}

/* Scrollbar for modal content */
.qm-storyboard-grid::-webkit-scrollbar {
    width: 6px;
}

.qm-storyboard-grid::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
}

.qm-storyboard-grid::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.qm-storyboard-grid::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

.qm-storyboard-card {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--qm-border-color);
    border-radius: 10px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.qm-storyboard-card:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--qm-accent-light);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

.qm-storyboard-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 8px;
    margin-bottom: 4px;
}

.qm-storyboard-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

/* Storyboard Card Inner Layout (Phase V6.0 Optimized) */
.qm-storyboard-card-body {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

@container (min-width: 450px) {
    .qm-storyboard-card-body {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
}
.qm-storyboard-card {
    container-type: inline-size;
}

.qm-storyboard-field label {
    font-size: 0.8rem;
    color: var(--qm-text-muted);
}

.qm-storyboard-field textarea,
.qm-storyboard-field input {
    background: var(--qm-bg-base);
    border: 1px solid var(--qm-border-color);
    border-radius: 4px;
    padding: 8px;
    color: var(--qm-text-main);
    font-family: inherit;
    font-size: 0.85rem;
    resize: vertical;
}

.qm-storyboard-field textarea:focus,
.qm-storyboard-field input:focus {
    outline: none;
    border-color: var(--qm-accent);
}

.qm-storyboard-field textarea {
    min-height: 60px;
}

/* Settings Modal Overlay — INHERITS display from .qm-modal-overlay above.
   Do NOT set display here to avoid override bug. */
#qm-settings-modal,
#qm-brand-modal,
#qm-export-modal,
#qm-canvas-modal {
    z-index: 5000;
    backdrop-filter: blur(6px);
    align-items: center;
    justify-content: center;
}

.qm-modal {
    background: var(--qm-bg-surface);
    border: 1px solid var(--qm-border-color);
    border-radius: 12px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6), var(--qm-neon-glow);
    color: var(--qm-text-main);
    animation: qm-modal-in 0.2s ease;
}

@keyframes qm-modal-in {
    from {
        transform: scale(0.95);
        opacity: 0;
    }

    to {
        transform: scale(1);
        opacity: 1;
    }
}

.qm-modal h3 {
    margin: 0 0 12px 0;
    color: var(--qm-accent-light);
}

.qm-modal label {
    display: block;
    font-size: 0.85rem;
    color: var(--qm-text-muted);
    margin-bottom: 4px;
}

.qm-modal select.qm-input {
    appearance: auto;
    background: var(--qm-bg-base);
    border: 1px solid var(--qm-border-color);
    border-radius: 6px;
    padding: 8px 12px;
    color: var(--qm-text-main);
    font-family: inherit;
    font-size: 0.9rem;
}

.qm-modal input.qm-input {
    background: var(--qm-bg-base);
    border: 1px solid var(--qm-border-color);
    border-radius: 6px;
    padding: 8px 12px;
    color: var(--qm-text-main);
    font-family: inherit;
    font-size: 0.9rem;
}

.qm-modal input.qm-input:focus,
.qm-modal select.qm-input:focus {
    outline: none;
    border-color: var(--qm-accent);
    box-shadow: var(--qm-neon-glow);
}

/* Phase A: Property Groups */
.qm-prop-group {
    margin-bottom: 10px;
}

.qm-prop-group label {
    display: block;
    font-size: 0.78rem;
    color: var(--qm-text-muted);
    margin-bottom: 3px;
    letter-spacing: 0.3px;
}

/* Range Slider Styling */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    background: var(--qm-bg-base);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--qm-accent);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(94, 106, 210, 0.5);
    transition: transform 0.15s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--qm-accent);
    border: none;
    cursor: pointer;
}

/* Select dropdown in panel (non-modal) */
.qm-properties-panel select.qm-input {
    appearance: auto;
    background: var(--qm-bg-base);
    border: 1px solid var(--qm-border-color);
    border-radius: 6px;
    padding: 6px 10px;
    color: var(--qm-text-main);
    font-family: inherit;
    font-size: 0.85rem;
}

.qm-properties-panel select.qm-input:focus {
    outline: none;
    border-color: var(--qm-accent);
}

/* Floating Mixer Panel */
.qm-mixer-panel {
    position: fixed;
    bottom: 120px;
    right: 20px;
    width: 300px;
    background: var(--qm-bg-surface);
    border: 1px solid var(--qm-border-color);
    border-radius: 12px;
    padding: 16px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5), var(--qm-neon-glow);
    z-index: 4000;
    animation: qm-modal-in 0.2s ease;
}

/* Properties panel scrollable area */
.qm-properties-panel .qm-panel-content {
    max-height: calc(100vh - 300px);
    overflow-y: auto;
}

.qm-properties-panel .qm-panel-content::-webkit-scrollbar {
    width: 4px;
}

.qm-properties-panel .qm-panel-content::-webkit-scrollbar-thumb {
    background: var(--qm-bg-surface-hover);
    border-radius: 2px;
}

/* =========================================
   Phase E/F/H/I: Component Styles
   ========================================= */

/* Canvas Tool Buttons */
.canvas-tool-btn {
    background: transparent;
    color: var(--qm-text-muted);
    border: 1px solid var(--qm-border-color);
    transition: all 0.2s ease;
    cursor: pointer;
}

.canvas-tool-btn:hover {
    background: var(--qm-accent-dim);
    color: var(--qm-accent-light);
    border-color: var(--qm-accent);
    transform: translateY(-1px);
}

.canvas-tool-btn.active,
.canvas-tool-btn[style*="background: var(--qm-accent)"] {
    background: var(--qm-accent) !important;
    color: #fff !important;
    border-color: var(--qm-accent-light);
    box-shadow: 0 0 12px rgba(94, 106, 210, 0.4);
}

/* AI Tool Cards (glassmorphism) */
.qm-ai-tool-card {
    background: var(--qm-gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 10px;
    padding: 14px;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(8px);
    position: relative;
    overflow: hidden;
}

.qm-ai-tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--qm-accent), transparent);
    opacity: 0;
    transition: opacity 0.3s;
}

.qm-ai-tool-card:hover {
    border-color: var(--qm-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(94, 106, 210, 0.15);
}

.qm-ai-tool-card:hover::before {
    opacity: 1;
}

.qm-ai-tool-card .card-icon {
    font-size: 1.4rem;
    margin-bottom: 6px;
    display: block;
}

.qm-ai-tool-card .card-title {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--qm-text-main);
    margin-bottom: 3px;
}

.qm-ai-tool-card .card-desc {
    font-size: 0.68rem;
    color: var(--qm-text-muted);
    line-height: 1.4;
}

/* Settings Section Headers */
.qm-settings-section {
    border-bottom: 1px solid var(--qm-border-color);
    padding-bottom: 16px;
    margin-bottom: 16px;
}

.qm-settings-section h4 {
    font-size: 0.9rem;
    color: var(--qm-accent-light);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Status Badge */
.qm-badge {
    display: inline-block;
    font-size: 0.6rem;
    padding: 2px 6px;
    border-radius: 10px;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.qm-badge-free {
    background: rgba(46, 160, 67, 0.15);
    color: var(--qm-success);
}

.qm-badge-paid {
    background: rgba(224, 159, 62, 0.15);
    color: var(--qm-warning);
}

/* Universal Scrollbar */
*::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

*::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* AI Tools Panel */
.qm-ai-tools-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 12px;
}

/* Micro-animation for expand/collapse */
.qm-ai-tool-expand {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 12px;
}

.qm-ai-tool-expand.open {
    max-height: 500px;
    padding: 12px;
}

/* =========================================
   Fullscreen / Immersive Mode
   ========================================= */
body.qm-fullscreen-mode {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 99999;
}

body.qm-fullscreen-mode .qm-header {
    height: 40px;
}

body.qm-fullscreen-mode .qm-header .qm-logo {
    font-size: 0.9rem;
    margin-right: 12px;
}

.qm-btn-fullscreen {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    padding: 5px 10px;
    font-size: 0.78rem;
    color: var(--qm-text-muted);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: all 0.2s;
    cursor: pointer;
    white-space: nowrap;
}

.qm-btn-fullscreen:hover {
    background: var(--qm-accent-dim);
    color: var(--qm-accent-light);
    border-color: var(--qm-accent);
}

/* =========================================
   API Help Tooltip Styles
   ========================================= */
.qm-api-help {
    background: rgba(94, 106, 210, 0.08);
    border: 1px solid rgba(94, 106, 210, 0.15);
    border-radius: 6px;
    padding: 8px 10px;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--qm-text-muted);
    line-height: 1.5;
}

.qm-api-help a {
    color: var(--qm-accent-light);
    text-decoration: none;
}

.qm-api-help a:hover {
    text-decoration: underline;
}

/* =========================================
   Phase Λ: Sovereign Control Layer
   ========================================= */

/* Auto/Manual Mode Toggle */
.qm-sovereign-toggle {
    display: flex;
    align-items: center;
}

.qm-mode-switch {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--qm-border-color);
    border-radius: 20px;
    padding: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    transition: all 0.3s ease;
    width: 86px;
    height: 32px;
}

.qm-mode-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    height: 100%;
    width: 100%;
    border-radius: 16px;
    font-size: 0.75rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.qm-mode-indicator.auto {
    background: linear-gradient(135deg, var(--qm-accent), #8a94e6);
    color: white;
    box-shadow: 0 0 10px rgba(94, 106, 210, 0.4);
}

.qm-mode-indicator.manual {
    background: transparent;
    color: var(--qm-text-muted);
}

.qm-mode-indicator.manual:hover {
    color: var(--qm-accent-light);
    background: rgba(94, 106, 210, 0.1);
}

@keyframes qm-mode-pulse {
    0% {
        transform: scale(0.95);
        opacity: 0.8;
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Parameter Lock Icon */
.qm-param-lock:hover {
    opacity: 1 !important;
    transform: scale(1.1);
}

/* A/B/C Comparator Bar */
.qm-comparator-bar {
    position: fixed;
    top: 60px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--qm-bg-surface);
    border: 1px solid var(--qm-border-color);
    border-radius: 20px;
    padding: 4px 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), var(--qm-neon-glow);
    z-index: 5000;
    align-items: center;
    gap: 12px;
    animation: qm-modal-in 0.3s ease;
}

.qm-comparator-label {
    font-size: 0.75rem;
    color: var(--qm-text-muted);
    font-weight: 600;
}

.qm-variant-btn {
    background: transparent;
    border: 1px solid var(--qm-border-color);
    border-radius: 50%;
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    color: var(--qm-text-muted);
    cursor: pointer;
    transition: all 0.2s;
}

.qm-variant-btn.active {
    background: var(--qm-accent);
    color: white;
    border-color: var(--qm-accent-light);
    box-shadow: 0 0 8px rgba(94, 106, 210, 0.5);
}

.qm-variant-btn:hover:not(.active) {
    background: var(--qm-bg-surface-light);
    color: var(--qm-accent-light);
}

/* =========================================
   Phase Σ: Mixer Panel
   ========================================= */

.qm-mixer-panel {
    position: fixed;
    bottom: calc(clamp(160px, 28vh, 350px) + 60px);
    /* Above timeline */
    right: 20px;
    background: var(--qm-bg-surface);
    border: 1px solid var(--qm-border-color);
    border-radius: 12px;
    padding: 12px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.6), var(--qm-neon-glow);
    z-index: 4000;
    animation: qm-modal-in 0.2s ease;
    backdrop-filter: blur(10px);
}

.qm-mixer-strips::-webkit-scrollbar {
    height: 6px;
}

.qm-mixer-strips::-webkit-scrollbar-thumb {
    background: var(--qm-bg-surface-hover);
    border-radius: 3px;
}

/* Responsive Design */

/* Large Laptop (≤1440px) */
@media (max-width: 1440px) {
    :root {
        --qm-left-panel-w: 260px;
        --qm-right-panel-w: 240px;
        --qm-track-h: 56px;
    }

    .qm-logo {
        font-size: 0.95rem;
        margin-right: 8px;
    }

    .qm-header-left {
        gap: 6px;
    }

    .qm-header-right {
        gap: 5px;
    }

    .qm-btn {
        padding: 5px 10px;
        font-size: 0.8rem;
        gap: 5px;
    }

    .qm-track-headers {
        width: 130px;
    }
}

/* Small Laptop (≤1280px) */
@media (max-width: 1280px) {
    :root {
        --qm-left-panel-w: 230px;
        --qm-right-panel-w: 220px;
        --qm-header-h: 42px;
        --qm-track-h: 50px;
    }

    .qm-logo {
        font-size: 0.85rem;
        margin-right: 6px;
    }

    .qm-menu-item {
        font-size: 0.78rem;
        padding: 4px 8px;
    }

    .qm-header-left {
        gap: 5px;
    }

    .qm-header-right {
        gap: 4px;
    }

    .qm-btn {
        padding: 4px 8px;
        font-size: 0.75rem;
    }

    .qm-tab {
        font-size: 0.72rem;
        padding: 8px 0;
    }

    /* Icon-only tabs on right panel at this width */
    .qm-properties-panel .qm-tab span {
        display: none;
    }

    .qm-timeline-container {
        min-height: 130px;
    }

    .qm-upload-box {
        padding: 16px 10px;
        font-size: 0.75rem;
    }

    .qm-upload-box i {
        font-size: 1.4rem;
    }

    .qm-track-headers {
        width: 120px;
    }
}

/* ========================================
   QuteMaster UI/UX Overhaul Styles
   ======================================== */

/* Fix: Header right buttons prevent wrap overflow */
.qm-header-right {
    flex-wrap: nowrap !important;
    overflow: hidden;
}

/* Header action button text hidden on small screens */
@media (max-width: 1400px) {
    .qm-btn-header-action span {
        display: none;
    }

    .qm-btn-header-action {
        padding: 4px 8px;
    }

    .qm-media-panel .qm-tab span {
        display: none;
    }

    .qm-media-panel .qm-tab {
        padding: 10px 14px;
    }
}

/* Prompt Library Button Pulse Animation */
#btn-prompt-library {
    position: relative;
    animation: promptLibPulse 3s ease-in-out infinite;
}

@keyframes promptLibPulse {

    0%,
    100% {
        box-shadow: none;
    }

    50% {
        box-shadow: 0 0 12px rgba(255, 215, 0, 0.4), 0 0 24px rgba(255, 215, 0, 0.15);
    }
}

/* Timeline Empty State Guide */
.qm-timeline-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--qm-text-muted);
    gap: 8px;
    padding: 24px;
    text-align: center;
    user-select: none;
    pointer-events: none;
}

.qm-timeline-empty-state i {
    font-size: 2rem;
    opacity: 0.3;
}

.qm-timeline-empty-state p {
    font-size: 0.8rem;
    opacity: 0.5;
    margin: 0;
}

/* Prompt Library Pill Buttons */
.lib-pill {
    padding: 5px 12px;
    border-radius: 16px;
    font-size: 0.72rem;
    background: rgba(255, 255, 255, 0.06);
    color: var(--qm-text-muted);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.lib-pill:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--qm-text-main);
}

.lib-pill.active {
    background: var(--qm-accent-dim);
    color: var(--qm-accent-light);
    border-color: var(--qm-accent);
    box-shadow: 0 0 8px rgba(94, 106, 210, 0.3);
}

/* Prompt Library Modal Improvements */
.qm-prompt-library-modal .qm-modal {
    max-height: 85vh;
}

/* Inject AI Director button styling */
.btn-inject-prompt {
    width: 28px !important;
    height: 28px !important;
    border-radius: 50% !important;
    transition: all 0.2s !important;
}

.btn-inject-prompt:hover {
    background: rgba(94, 106, 210, 0.2) !important;
    transform: scale(1.15);
}

/* Tablet / iPad (≤1024px) */
@media (max-width: 1024px) {
    :root {
        --qm-left-panel-w: 200px;
        --qm-right-panel-w: 190px;
        --qm-header-h: 40px;
        --qm-track-h: 44px;
    }

    .qm-header {
        padding: 0 6px;
    }

    .qm-logo {
        font-size: 0.8rem;
        margin-right: 4px;
    }

    .qm-back-btn {
        font-size: 0.9rem;
    }

    .qm-menu-item {
        font-size: 0.72rem;
        padding: 3px 6px;
    }

    .qm-btn {
        padding: 3px 6px;
        font-size: 0.7rem;
    }

    .qm-user-profile img {
        width: 24px;
        height: 24px;
    }

    .qm-upper-workspace {
        padding: 3px;
        gap: 3px;
    }

    .qm-panel-header {
        height: 32px;
        padding: 0 8px;
        font-size: 0.78rem;
    }

    .qm-tab {
        font-size: 0.68rem;
        padding: 6px 0;
    }

    .qm-player-controls {
        height: 40px;
        padding: 0 8px;
    }

    .qm-timecode {
        font-size: 0.85rem;
    }

    .qm-play-btn {
        width: 32px;
        height: 32px;
    }

    .qm-timeline-container {
        margin: 0 3px 3px 3px;
        min-height: 110px;
    }

    .qm-timeline-toolbar {
        padding: 0 8px;
        gap: 8px;
    }

    .qm-track-headers {
        width: 90px;
    }

    .qm-track-header {
        font-size: 0.63rem;
        padding: 2px 4px;
    }

    .qm-modal {
        max-width: 90vw !important;
        max-height: 85vh;
    }

    .qm-storyboard-grid {
        grid-template-columns: 1fr;
    }

    .qm-ai-tools-grid {
        grid-template-columns: 1fr;
    }
}

/* Small Tablet / iPad Mini (≤768px) */
@media (max-width: 768px) {
    :root {
        --qm-left-panel-w: 0px;
        --qm-right-panel-w: 0px;
    }

    .qm-media-panel,
    .qm-properties-panel {
        display: none;
    }

    .qm-preview-panel {
        flex: 1;
    }

    .qm-logo span,
    .qm-menu {
        display: none;
    }

    .qm-header-right {
        gap: 4px;
    }
}

/* --- Toast Notifications --- */
@keyframes qm-toast-slide-up {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes qm-toast-fade-out {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }

    to {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
}

.qm-toast {
    background: rgba(22, 25, 34, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--qm-text-main);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.85rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    gap: 8px;
    pointer-events: auto;
    animation: qm-toast-slide-up 0.3s cubic-bezier(0.2, 0.8, 0.2, 1) forwards;
}

.qm-toast.fade-out {
    animation: qm-toast-fade-out 0.3s ease-in forwards;
}

/* Premium Spinner replacing FA spin */
.qm-premium-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-top-color: var(--qm-text-main);
    border-radius: 50%;
    animation: qm-spin 0.8s linear infinite;
    display: inline-block;
}

@keyframes qm-spin {
    to {
        transform: rotate(360deg);
    }
}

/* --- Timeline Deep UX --- */
#track-area {
    scroll-behavior: smooth;
}

#playhead {
    width: 2px !important;
    background: var(--qm-accent) !important;
    box-shadow: 0 0 10px var(--qm-accent) !important;
    height: 100% !important;
    z-index: 100 !important;
    top: 0 !important;
    border: none !important;
    pointer-events: none;
}

#playhead::before {
    content: '';
    position: absolute;
    top: 0;
    left: -5px;
    width: 12px;
    height: 12px;
    background: var(--qm-accent);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--qm-accent);
}

.qm-clip {
    transition: box-shadow 0.2s, filter 0.2s, opacity 0.2s, transform 0.1s !important;
    border-radius: 6px !important;
    overflow: hidden !important;
}

.qm-clip:hover {
    box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.3) inset !important;
    filter: brightness(1.15) !important;
}

.qm-clip::before,
.qm-clip::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8px;
    background: rgba(255, 255, 255, 0.0);
    transition: background 0.2s;
    z-index: 10;
}

.qm-clip::before {
    left: 0;
    cursor: ew-resize;
}

.qm-clip::after {
    right: 0;
    cursor: ew-resize;
}

.qm-clip:hover::before,
.qm-clip:hover::after {
    background: rgba(255, 255, 255, 0.25);
}

.qm-clip.dragging {
    opacity: 0.65 !important;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.6), 0 0 0 2px var(--qm-accent) inset !important;
    transform: scale(1.02) !important;
    z-index: 99 !important;
    cursor: grabbing !important;
}

.qm-track-row.muted-track .qm-clip {
    opacity: 0.4 !important;
    filter: grayscale(1) !important;
}

/* --- Panels & Empty States --- */
.qm-upload-box {
    transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.qm-upload-box.dragover {
    border-color: var(--qm-accent) !important;
    background: rgba(94, 106, 210, 0.15) !important;
    transform: scale(1.02);
    box-shadow: 0 0 20px rgba(94, 106, 210, 0.4) inset;
    color: var(--qm-accent-light) !important;
}

.qm-empty-props {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--qm-text-muted);
    font-size: 0.85rem;
    padding: 24px;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 8px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
    animation: qm-fade-in 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.qm-empty-props i {
    font-size: 2.2rem;
    margin-bottom: 16px;
    color: rgba(255, 255, 255, 0.15);
    transition: all 0.3s ease;
}

.qm-empty-props:hover i {
    color: var(--qm-accent);
    transform: scale(1.1) translateY(-5px);
}

.qm-ai-step {
    animation: qm-panel-content-fade 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}



.qm-track-controls i:hover {
    color: var(--qm-text-main);
}

/* Phase V6.0: AI Semantic Workflow Transcript Words */
.qm-transcript-word {
    padding: 2px 4px;
    border-radius: 4px;
    cursor: text;
    transition: background 0.2s, color 0.2s;
    display: inline-block;
    color: var(--qm-text-main);
}

.qm-transcript-word:hover {
    background: rgba(255, 255, 255, 0.1);
}

.qm-transcript-word:focus {
    background: rgba(52, 152, 219, 0.3);
    outline: none;
}

.qm-transcript-word.deleted {
    text-decoration: line-through;
    opacity: 0.5;
    background: rgba(231, 76, 60, 0.2);
    cursor: pointer;
}