:root {
    color-scheme: light;
    --ink: #111827;
    --muted: #64748b;
    --panel: #ffffff;
    --panel-soft: #f8fafc;
    --line: #d8dee8;
    --brand: #0f766e;
    --brand-strong: #115e59;
    --accent: #f59e0b;
    --danger: #dc2626;
    --ok: #15803d;
    --shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    max-width: 100%;
    overflow-x: hidden;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow: hidden;
    background: #e7edf5;
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    letter-spacing: 0;
}

.app-loader {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    align-content: center;
    gap: 18px;
    padding: 24px;
    color: #0f172a;
    background:
        linear-gradient(rgba(15, 23, 42, 0.045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.045) 1px, transparent 1px),
        radial-gradient(circle at 48% 34%, rgba(37, 99, 235, 0.14), transparent 34%),
        #e7edf5;
    background-size: 28px 28px, 28px 28px, auto, auto;
    transition: opacity 0.22s ease, visibility 0.22s ease;
}

.app-loader.ready {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.loader-mark {
    width: 76px;
    height: 76px;
    border-radius: 16px;
    box-shadow: 0 18px 40px rgba(37, 99, 235, 0.26);
}

.loader-copy {
    display: grid;
    gap: 6px;
    text-align: center;
}

.loader-copy strong {
    font-size: 18px;
}

.loader-copy span {
    color: #475569;
    font-size: 13px;
}

.loader-ring {
    width: 42px;
    height: 42px;
    border: 3px solid rgba(15, 118, 110, 0.18);
    border-top-color: #0f766e;
    border-radius: 999px;
    animation: loaderSpin 0.8s linear infinite;
}

@keyframes loaderSpin {
    to {
        transform: rotate(360deg);
    }
}

@media (prefers-reduced-motion: reduce) {
    .app-loader {
        transition: none;
    }

    .loader-ring {
        animation: none;
    }
}

button,
input,
textarea {
    font: inherit;
}

button {
    border: 0;
}

.app {
    display: grid;
    grid-template-rows: 64px minmax(0, 1fr);
    width: 100%;
    max-width: 100%;
    height: 100vh;
}

.topbar {
    display: grid;
    grid-template-columns: minmax(180px, 0.75fr) minmax(220px, 1fr) minmax(190px, 0.8fr) auto;
    gap: 14px;
    align-items: center;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(16px);
    z-index: 5;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    border-radius: 8px;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.2);
    overflow: hidden;
}

.brand-mark img {
    width: 100%;
    height: 100%;
    display: block;
}

.brand-title {
    margin: 0;
    font-size: 19px;
    line-height: 1;
    font-weight: 780;
}

.brand-subtitle {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.status-strip {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 10px;
    align-items: center;
    min-width: 0;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel-soft);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 999px;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.15);
}

.status-dot.ok {
    background: var(--ok);
    box-shadow: 0 0 0 4px rgba(21, 128, 61, 0.14);
}

.status-dot.error {
    background: var(--danger);
    box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.12);
}

#statusText {
    min-width: 0;
    color: #334155;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.top-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.room-join {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
    min-width: 0;
}

.shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 330px;
    gap: 14px;
    min-height: 0;
    padding: 14px;
}

.media-rail {
    min-height: 0;
    overflow: visible;
    border: 1px solid rgba(216, 222, 232, 0.9);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: var(--shadow);
    position: relative;
    z-index: 6;
}

.workspace {
    min-width: 0;
    min-height: 0;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(216, 222, 232, 0.96);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
}

.board-toolbar {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    z-index: 6;
    display: flex;
    align-items: center;
    gap: 8px;
    max-width: max-content;
    padding: 7px;
    border: 1px solid rgba(203, 213, 225, 0.92);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 14px 36px rgba(15, 23, 42, 0.16);
    backdrop-filter: blur(14px);
}

.toolbar-group {
    display: grid;
    align-items: center;
    gap: 5px;
    padding-right: 8px;
    border-right: 1px solid var(--line);
}

.toolbar-group:last-child {
    padding-right: 0;
    border-right: 0;
}

.popover-host {
    position: relative;
}

.tool-popover {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    z-index: 8;
    padding: 10px;
    border: 1px solid rgba(203, 213, 225, 0.96);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.2);
    backdrop-filter: blur(14px);
}

.board {
    position: relative;
    width: 100%;
    height: 100%;
    background-color: #ffffff;
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.055) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.055) 1px, transparent 1px);
    background-size: 28px 28px;
    touch-action: none;
    cursor: crosshair;
}

canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

#previewCanvas {
    z-index: 2;
    pointer-events: none;
}

.text-layer {
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
}

.image-layer {
    position: absolute;
    inset: 0;
    z-index: 4;
    pointer-events: none;
}

.object-layer {
    position: absolute;
    inset: 0;
    z-index: 3;
    pointer-events: none;
}

.cursor-layer {
    position: absolute;
    inset: 0;
    z-index: 5;
    pointer-events: none;
}

.remote-cursor {
    position: absolute;
    left: 0;
    top: 0;
    display: grid;
    grid-template-columns: 14px auto;
    align-items: start;
    gap: 4px;
    color: var(--cursor-color);
    filter: drop-shadow(0 2px 4px rgba(15, 23, 42, 0.16));
}

.remote-cursor-pointer {
    width: 0;
    height: 0;
    border-top: 14px solid currentColor;
    border-right: 9px solid transparent;
}

.remote-cursor-label {
    max-width: 128px;
    min-height: 22px;
    padding: 0 7px;
    border-radius: 8px;
    color: #fff;
    background: var(--cursor-color);
    font-size: 12px;
    font-weight: 800;
    line-height: 22px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transform: translateY(8px);
}

.pointer-pulse {
    position: absolute;
    left: 0;
    top: 0;
    width: 1px;
    height: 1px;
    color: var(--pointer-color);
}

.pointer-pulse span {
    position: absolute;
    left: 0;
    top: 0;
    width: 52px;
    height: 52px;
    border: 2px solid currentColor;
    border-radius: 999px;
    opacity: 0;
    transform: translate(-50%, -50%) scale(2.4);
    animation: pointerPulseIn 760ms ease-out forwards;
    animation-delay: var(--ring-delay);
}

@keyframes pointerPulseIn {
    0% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(2.6);
    }

    20% {
        opacity: 0.78;
    }

    100% {
        opacity: 0;
        transform: translate(-50%, -50%) scale(0.22);
    }
}

.section {
    display: grid;
    gap: 10px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
}

.section:last-child {
    border-bottom: 0;
    padding-bottom: 0;
}

.section-title {
    margin: 0;
    color: #475569;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.room-line {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
}

.field {
    width: 100%;
    min-width: 0;
    height: 38px;
    padding: 0 10px;
    color: #0f172a;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    outline: none;
}

select.field {
    cursor: pointer;
}

.field:focus,
.text-editor:focus {
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.14);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 38px;
    padding: 0 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: #0f172a;
    background: #fff;
    cursor: pointer;
    font-size: 13px;
    font-weight: 700;
    white-space: nowrap;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn:hover {
    background: #f1f5f9;
}

.btn:active {
    transform: translateY(1px);
}

.btn.primary {
    color: #fff;
    border-color: var(--brand);
    background: var(--brand);
}

.btn.primary:hover {
    background: var(--brand-strong);
}

.btn.danger {
    color: #fff;
    border-color: var(--danger);
    background: var(--danger);
}

.btn.icon {
    width: 38px;
    min-width: 38px;
    padding: 0;
}

.btn.active {
    color: #fff;
    border-color: #2563eb;
    background: #2563eb;
}

.grid-2,
.grid-3 {
    display: grid;
    gap: 8px;
}

.grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.tool-grid {
    grid-template-columns: 34px 34px 49px 34px 34px 34px 34px 34px;
}

.tool-btn {
    width: 34px;
    min-width: 34px;
    height: 34px;
    min-height: 34px;
    padding: 0;
}

.label-text {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.tool-btn .icon-small {
    width: 16px;
    height: 16px;
}

.line-tool {
    display: grid;
    grid-template-columns: 34px 15px;
    position: relative;
}

.line-tool .tool-btn {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.line-menu-btn {
    width: 15px;
    min-width: 15px;
    height: 34px;
    min-height: 34px;
    padding: 0;
    border-left: 0;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.line-menu-btn .icon-small {
    width: 11px;
    height: 11px;
}

.line-popover {
    display: grid;
    gap: 6px;
    width: 132px;
}

.line-option {
    display: grid;
    grid-template-columns: 18px minmax(0, 1fr);
    gap: 8px;
    align-items: center;
    min-height: 32px;
    padding: 0 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: #0f172a;
    background: #fff;
    cursor: pointer;
    font-size: 12px;
    font-weight: 800;
}

.line-option:hover {
    background: #f1f5f9;
}

.line-option.active {
    color: #fff;
    border-color: #2563eb;
    background: #2563eb;
}

.action-grid {
    grid-template-columns: repeat(4, 34px);
}

.view-grid {
    grid-template-columns: 34px 46px 34px;
}

.action-btn {
    width: 34px;
    min-width: 34px;
    height: 34px;
    min-height: 34px;
    padding: 0;
}

.zoom-reset {
    width: 46px;
    min-width: 46px;
    height: 34px;
    min-height: 34px;
    padding: 0;
    font-size: 11px;
    font-weight: 800;
}

#zoomValue::after {
    content: "%";
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(4, 28px);
    gap: 8px;
}

.swatch {
    width: 28px;
    height: 28px;
    border: 2px solid rgba(15, 23, 42, 0.1);
    border-radius: 6px;
    cursor: pointer;
}

.swatch.active {
    border-color: #0f172a;
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.13);
}

.current-color {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(15, 23, 42, 0.18);
    border-radius: 6px;
    background: #111827;
}

.size-toggle {
    gap: 5px;
}

.size-dot {
    display: inline-block;
    width: min(18px, max(5px, var(--current-size, 6px)));
    height: min(18px, max(5px, var(--current-size, 6px)));
    border-radius: 999px;
    background: currentColor;
}

.size-number {
    font-size: 11px;
    font-weight: 800;
    line-height: 1;
}

input[type="range"] {
    width: 100%;
    accent-color: var(--brand);
}

.size-popover {
    width: 180px;
}

.size-popover input[type="range"] {
    display: block;
}

.size-presets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-top: 10px;
}

.size-preset {
    display: grid;
    place-items: center;
    height: 32px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: #0f172a;
    background: #fff;
    cursor: pointer;
}

.size-preset:hover {
    background: #f1f5f9;
}

.size-preset.active {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.size-preset span {
    display: block;
    width: var(--dot-size);
    height: var(--dot-size);
    border-radius: 999px;
    background: currentColor;
}

.participants {
    display: grid;
    gap: 8px;
}

.device-field {
    display: grid;
    gap: 4px;
}

.device-field span {
    color: #64748b;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
}

.participant {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: 8px;
    align-items: center;
    min-height: 34px;
    color: #334155;
    font-size: 13px;
}

.avatar {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    color: #fff;
    background: #2563eb;
    font-size: 12px;
    font-weight: 800;
}

.participant-name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 22px;
    padding: 0 7px;
    border-radius: 999px;
    color: #475569;
    background: #eef2f7;
    font-size: 11px;
    font-weight: 800;
}

.media-rail {
    display: grid;
    grid-template-rows: auto minmax(0, 1fr) auto;
    gap: 12px;
    padding: 14px;
}

.call-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.call-device {
    display: grid;
    grid-template-columns: 42px 16px;
}

.speaker-device {
    grid-template-columns: 42px;
}

.call-btn {
    width: 42px;
    min-width: 42px;
    height: 42px;
    padding: 0;
}

.call-device .call-btn {
    width: 42px;
    min-width: 42px;
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.speaker-device .call-btn {
    border-radius: 8px;
}

.call-menu-btn {
    width: 16px;
    min-width: 16px;
    height: 42px;
    min-height: 42px;
    padding: 0;
    border-left: 0;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.call-menu-btn .icon-small {
    width: 11px;
    height: 11px;
}

.device-popover {
    top: calc(100% + 8px);
    z-index: 30;
    width: min(260px, calc(100vw - 28px));
}

.call-device:nth-child(2) .device-popover,
.speaker-device .device-popover {
    right: 0;
    left: auto;
}

.call-btn.muted,
.call-btn.off {
    color: #fff;
    border-color: var(--danger);
    background: var(--danger);
}

.streams {
    display: grid;
    align-content: start;
    gap: 10px;
    min-height: 0;
    overflow: auto;
}

.stream-tile {
    position: relative;
    overflow: hidden;
    min-height: 144px;
    aspect-ratio: 16 / 10;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #0f172a;
}

.stream-tile.expanded {
    width: min(100%, 1280px);
    height: min(82vh, 820px);
    min-height: 0;
    aspect-ratio: auto;
    border-color: rgba(148, 163, 184, 0.45);
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.32);
}

.stream-tile.expanded.screen video,
.stream-tile.expanded video {
    object-fit: contain;
}

.stream-tile.audio-only {
    display: grid;
    place-items: center;
    aspect-ratio: auto;
    min-height: 92px;
    background: linear-gradient(135deg, #0f172a, #164e63);
}

.stream-tile video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background: #0f172a;
}

.stream-tile.screen video {
    object-fit: contain;
}

.stream-label {
    position: absolute;
    left: 8px;
    bottom: 8px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    max-width: calc(100% - 16px);
    min-height: 26px;
    padding: 0 8px;
    border-radius: 8px;
    color: #fff;
    background: rgba(15, 23, 42, 0.74);
    font-size: 12px;
    font-weight: 800;
}

.stream-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 6px;
}

.stream-action-btn {
    width: 30px;
    min-width: 30px;
    height: 30px;
    min-height: 30px;
    padding: 0;
    color: #fff;
    border-color: rgba(255, 255, 255, 0.18);
    background: rgba(15, 23, 42, 0.72);
}

.stream-action-btn:hover {
    background: rgba(15, 23, 42, 0.9);
}

.stream-viewer {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
    background: rgba(2, 6, 23, 0.88);
    backdrop-filter: blur(10px);
}

.stream-viewer-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    color: #fff;
    font-size: 13px;
    font-weight: 800;
}

.stream-viewer-actions {
    display: flex;
    gap: 8px;
}

.stream-viewer-slot {
    display: grid;
    place-items: center;
    min-width: 0;
    min-height: 0;
}

.stream-viewer:fullscreen {
    padding: 14px;
    background: #020617;
}

.empty-state {
    display: grid;
    place-items: center;
    min-height: 150px;
    padding: 16px;
    border: 1px dashed #cbd5e1;
    border-radius: 8px;
    color: #64748b;
    background: #f8fafc;
    text-align: center;
    font-size: 13px;
    line-height: 1.35;
}

.activity {
    display: grid;
    gap: 6px;
    max-height: 116px;
    overflow: auto;
    padding-top: 10px;
    border-top: 1px solid var(--line);
    color: #475569;
    font-size: 12px;
    line-height: 1.35;
}

.text-editor {
    position: absolute;
    z-index: 5;
    min-width: 180px;
    min-height: 42px;
    padding: 7px 9px;
    resize: both;
    border: 1px solid var(--brand);
    border-radius: 8px;
    outline: none;
    color: #111827;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 12px 28px rgba(15, 23, 42, 0.16);
}

.text-object {
    position: absolute;
    min-width: 32px;
    min-height: 24px;
    padding: 4px 6px;
    border: 1px solid transparent;
    border-radius: 6px;
    outline: none;
    overflow: auto;
    resize: both;
    background: rgba(255, 255, 255, 0.01);
    cursor: move;
    pointer-events: auto;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
    user-select: none;
}

.shape-object {
    position: absolute;
    min-width: 16px;
    min-height: 16px;
    border: 1px solid transparent;
    border-radius: 6px;
    outline: none;
    overflow: visible;
    resize: both;
    cursor: move;
    pointer-events: auto;
    user-select: none;
}

.shape-object:hover,
.shape-object:focus {
    border-color: rgba(37, 99, 235, 0.65);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.shape-object svg {
    display: block;
    width: 100%;
    height: 100%;
    overflow: visible;
    pointer-events: none;
}

.image-object {
    position: absolute;
    min-width: 48px;
    min-height: 48px;
    border: 1px solid transparent;
    border-radius: 6px;
    outline: none;
    overflow: hidden;
    resize: both;
    cursor: move;
    pointer-events: auto;
    background: rgba(15, 23, 42, 0.04);
}

.image-object img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
    user-select: none;
}

.image-object:hover,
.image-object:focus {
    border-color: rgba(37, 99, 235, 0.65);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}


.text-object:hover,
.text-object:focus,
.text-object.editing {
    border-color: rgba(37, 99, 235, 0.65);
    background: rgba(255, 255, 255, 0.82);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.text-object.editing {
    cursor: text;
    user-select: text;
}

.toast {
    position: fixed;
    left: 50%;
    bottom: 18px;
    z-index: 20;
    max-width: min(480px, calc(100vw - 28px));
    transform: translate(-50%, 130%);
    padding: 10px 14px;
    border-radius: 8px;
    color: #fff;
    background: #0f172a;
    box-shadow: 0 14px 36px rgba(15, 23, 42, 0.26);
    font-size: 13px;
    font-weight: 700;
    transition: transform 0.2s ease;
}

.toast.show {
    transform: translate(-50%, 0);
}

.object-context-menu {
    position: fixed;
    z-index: 60;
    display: grid;
    gap: 4px;
    width: 178px;
    padding: 6px;
    border: 1px solid rgba(203, 213, 225, 0.96);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 42px rgba(15, 23, 42, 0.22);
    backdrop-filter: blur(14px);
}

.object-context-menu button {
    display: grid;
    grid-template-columns: 18px minmax(0, 1fr);
    align-items: center;
    gap: 8px;
    min-height: 32px;
    padding: 0 8px;
    border-radius: 6px;
    color: #0f172a;
    background: transparent;
    cursor: pointer;
    font-size: 12px;
    font-weight: 800;
    text-align: left;
}

.object-context-menu button:hover {
    background: #f1f5f9;
}

.hidden {
    display: none !important;
}

.icon-small {
    width: 16px;
    height: 16px;
}

.icons-fallback i[data-lucide] {
    display: none;
}

.icons-fallback .btn::after {
    content: attr(title);
    font-size: 11px;
    font-weight: 800;
    line-height: 1;
}

.icons-fallback .btn.icon::after,
.icons-fallback .tool-btn::after,
.icons-fallback .action-btn::after,
.icons-fallback .call-btn::after,
.icons-fallback .call-menu-btn::after,
.icons-fallback .stream-action-btn::after {
    content: "?";
}

.icons-fallback [data-tool="pen"]::after { content: "P"; }
.icons-fallback [data-tool="eraser"]::after { content: "E"; }
.icons-fallback [data-tool="line"]::after { content: "L"; }
.icons-fallback [data-tool="rect"]::after { content: "R"; }
.icons-fallback [data-tool="circle"]::after { content: "O"; }
.icons-fallback [data-tool="text"]::after { content: "T"; }
.icons-fallback [data-tool="pointer"]::after { content: "Ptr"; font-size: 9px; }
.icons-fallback [data-tool="pan"]::after { content: "H"; }
.icons-fallback #lineMenuBtn::after,
.icons-fallback .call-menu-btn::after { content: "v"; }
.icons-fallback #undoBtn::after { content: "Undo"; font-size: 9px; }
.icons-fallback #addImageBtn::after { content: "Img"; font-size: 9px; }
.icons-fallback #downloadBtn::after { content: "PNG"; font-size: 9px; }
.icons-fallback #clearBtn::after { content: "Del"; font-size: 9px; }
.icons-fallback #zoomOutBtn::after { content: "-"; }
.icons-fallback #zoomInBtn::after { content: "+"; }
.icons-fallback #copyLinkBtn::after { content: "Link"; }
.icons-fallback #newRoomBtn::after { content: "+"; }
.icons-fallback #newBoardBtn::after { content: "New"; }
.icons-fallback #joinBtn::after { content: "Go"; }
.icons-fallback #micToggleBtn::after { content: "Mic"; font-size: 9px; }
.icons-fallback #cameraToggleBtn::after,
.icons-fallback #videoBtn::after { content: "Cam"; font-size: 9px; }
.icons-fallback #speakerMenuBtn::after { content: "Vol"; font-size: 9px; }
.icons-fallback #audioBtn::after { content: "Call"; font-size: 9px; }
.icons-fallback #screenBtn::after { content: "Scr"; font-size: 9px; }
.icons-fallback #hangupBtn::after { content: "End"; font-size: 9px; }

@media (max-width: 1120px) {
    body {
        overflow: auto;
    }

    .app {
        grid-template-rows: auto auto;
        height: auto;
        min-height: 100vh;
    }

    .topbar {
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "brand status"
            "room actions";
        align-items: center;
        gap: 8px 10px;
        padding: 8px 12px;
    }

    .brand {
        grid-area: brand;
    }

    .status-strip {
        grid-area: status;
    }

    .room-join {
        grid-area: room;
        width: 100%;
        min-width: 0;
    }

    .top-actions {
        grid-area: actions;
    }

    .brand-subtitle {
        display: none;
    }

    .brand-mark {
        width: 34px;
        height: 34px;
    }

    .brand-title {
        font-size: 18px;
    }

    .status-strip,
    .field {
        height: 36px;
    }

    .status-strip {
        padding: 6px 9px;
    }

    .top-actions .btn {
        min-height: 36px;
        padding: 0 9px;
        font-size: 12px;
    }

    .shell {
        grid-template-columns: 1fr;
        min-height: auto;
    }

    .workspace {
        height: clamp(500px, 62vh, 720px);
        min-height: 0;
        order: -1;
    }

    .media-rail {
        display: grid;
        grid-template-columns: minmax(270px, 0.85fr) minmax(0, 1fr);
        grid-template-rows: auto minmax(0, auto);
        align-items: start;
        min-height: 0;
    }

    .media-rail > .section {
        grid-column: 1;
        grid-row: 1;
    }

    .streams {
        grid-column: 2;
        grid-row: 1 / span 2;
        max-height: 360px;
    }

    .activity {
        grid-column: 1;
        grid-row: 2;
        max-height: 130px;
    }

    .board-toolbar {
        max-width: calc(100% - 24px);
        overflow-x: auto;
        overflow-y: hidden;
        scrollbar-width: thin;
    }
}

@media (max-width: 760px) {
    .topbar {
        grid-template-columns: 1fr;
        grid-template-areas:
            "brand"
            "room"
            "actions";
        gap: 8px;
        padding: 8px 10px;
        max-width: 100vw;
        overflow: hidden;
    }

    .brand-mark {
        width: 32px;
        height: 32px;
    }

    .brand-title {
        font-size: 17px;
    }

    .status-strip {
        display: none;
    }

    #statusText {
        display: none;
    }

    #roomBadge {
        font-size: 12px;
    }

    .room-join {
        width: 100%;
        min-width: 0;
    }

    .top-actions {
        display: grid;
        grid-template-columns: repeat(3, 36px);
        justify-content: start;
        gap: 6px;
        width: max-content;
        min-width: 0;
    }

    .top-actions .btn {
        width: 36px;
        min-width: 0;
        height: 36px;
        min-height: 36px;
        padding: 0;
        gap: 0;
        font-size: 12px;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .top-actions .btn .icon-small {
        width: 16px;
        height: 16px;
    }

    .top-actions .btn {
        font-size: 0;
    }

    .top-actions .btn:first-child {
        grid-column: auto;
    }

    .shell {
        gap: 10px;
        padding: 10px;
    }

    .workspace {
        height: min(58dvh, 520px);
        min-height: 360px;
        border-radius: 8px;
    }

    .board-toolbar {
        top: 8px;
        left: 8px;
        right: 8px;
        max-width: calc(100% - 16px);
        padding: 6px;
        gap: 6px;
    }

    .toolbar-group {
        gap: 4px;
        padding-right: 6px;
    }

    .tool-grid {
        grid-template-columns: 34px 34px 49px 34px 34px 34px 34px 34px;
    }

    .board-toolbar .tool-popover {
        position: fixed;
        top: auto;
        bottom: 14px;
        left: 14px;
        max-width: calc(100vw - 28px);
    }

    .color-popover {
        width: 160px;
    }

    .size-popover {
        width: min(220px, calc(100vw - 28px));
    }

    .media-rail {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        gap: 10px;
        padding: 10px;
        overflow: visible;
    }

    .media-rail > .section,
    .streams,
    .activity {
        grid-column: 1;
        grid-row: auto;
    }

    .section {
        gap: 8px;
        padding-bottom: 10px;
    }

    .participants {
        grid-template-columns: repeat(auto-fit, minmax(138px, 1fr));
    }

    .call-controls {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 2px;
        scrollbar-width: thin;
    }

    .call-device,
    .speaker-device,
    .call-controls > .call-btn {
        flex: 0 0 auto;
    }

    .streams {
        display: flex;
        gap: 8px;
        max-height: none;
        min-height: 132px;
        overflow-x: auto;
        overflow-y: hidden;
        padding-bottom: 2px;
        scrollbar-width: thin;
    }

    .stream-tile {
        flex: 0 0 min(260px, 78vw);
        min-height: 128px;
    }

    .empty-state {
        flex: 1 0 100%;
        min-height: 116px;
    }

    .activity {
        max-height: 92px;
    }

    .device-popover {
        position: fixed;
        top: auto;
        right: 10px;
        bottom: 76px;
        left: 10px;
        width: auto;
    }

    .stream-viewer {
        padding: 10px;
    }

    .stream-tile.expanded {
        width: 100%;
        height: min(76dvh, 680px);
    }
}

@media (max-width: 420px) {
    .topbar {
        grid-template-columns: 1fr;
    }

    .status-strip {
        display: none;
    }

    .room-join {
        grid-template-columns: minmax(0, 1fr) 36px;
    }

    .room-join .btn.icon {
        width: 36px;
        min-width: 36px;
        min-height: 36px;
    }

    .top-actions .btn {
        height: 34px;
        min-height: 34px;
    }

    .workspace {
        height: 56dvh;
        min-height: 330px;
    }

    .btn {
        font-size: 12px;
    }

    .object-context-menu {
        width: min(178px, calc(100vw - 16px));
    }
}