/* Google Antigravity 2.0 Classic Design System */
:root {
    --bg-root: #0b0d14;
    --bg-rail: #0e111a;
    --bg-sidebar: #121522;
    --bg-card: #161a2a;
    --bg-card-hover: #1c2236;
    --border-subtle: #1f2538;
    --border-accent: #2e3752;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --agy-blue: #4285f4;
    --agy-purple: #9d4edd;
    --agy-green: #10b981;
    --agy-amber: #f59e0b;
    --agy-red: #ef4444;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "JetBrains Mono", Consolas, "Courier New", monospace;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body.antigravity-dark {
    background-color: var(--bg-root);
    color: var(--text-primary);
    font-family: var(--font-sans);
    height: 100vh;
    overflow: hidden;
    user-select: none;
}

/* 4-Column Layout */
.antigravity-layout {
    display: grid;
    grid-template-columns: 48px 240px 1fr 340px;
    height: 100vh;
    width: 100vw;
    background: var(--bg-root);
}

/* 1. Left Icon Rail */
.icon-rail {
    background: var(--bg-rail);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    z-index: 10;
}

.rail-top, .rail-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.agy-logo {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    filter: drop-shadow(0 0 8px rgba(66, 133, 244, 0.4));
}

.rail-btn {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

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

.rail-btn.active {
    color: var(--agy-blue);
    background: rgba(66, 133, 244, 0.12);
}

/* 2. Left Sidebar Panel */
.sidebar-panel {
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    padding: 16px;
    gap: 16px;
}

.sidebar-header {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.app-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.gradient-text {
    font-size: 18px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--agy-blue), var(--agy-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.tag-badge {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 2px 6px;
    border-radius: 4px;
}

.new-chat-btn {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.2), rgba(157, 78, 221, 0.2));
    border: 1px solid rgba(66, 133, 244, 0.3);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    transition: all 0.2s;
}

.new-chat-btn:hover {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.35), rgba(157, 78, 221, 0.35));
    border-color: var(--agy-blue);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.panel-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.group-title {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.workspace-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 8px 10px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-secondary);
}

.path-truncate {
    font-family: var(--font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.model-badge-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 10px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sparkle-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--agy-blue), var(--agy-purple));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    flex-shrink: 0;
}

.model-info {
    display: flex;
    flex-direction: column;
}

.model-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.model-sub {
    font-size: 10px;
    color: var(--text-muted);
}

.skills-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.skill-pill {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    color: var(--agy-blue);
    font-family: var(--font-mono);
}

.policy-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 8px 10px;
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    font-size: 11px;
}

.policy-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-secondary);
}

.status-pill {
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
}

.status-pill.green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--agy-green);
}

.status-pill.blue {
    background: rgba(66, 133, 244, 0.15);
    color: var(--agy-blue);
}

.sidebar-status-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-secondary);
    padding-top: 8px;
    border-top: 1px solid var(--border-subtle);
}

.status-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
}

.status-dot.online {
    background: var(--agy-green);
    box-shadow: 0 0 8px var(--agy-green);
}

/* 3. Center Main Chat Canvas */
.chat-canvas {
    display: flex;
    flex-direction: column;
    background: var(--bg-root);
    position: relative;
    height: 100vh;
}

.canvas-topbar {
    padding: 12px 24px;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(11, 13, 20, 0.8);
    backdrop-filter: blur(8px);
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.session-badge {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-secondary);
}

.dot-indicator {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--agy-blue);
}

.sandbox-pill {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    padding: 3px 8px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-muted);
}

.topbar-action-btn {
    background: transparent;
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.topbar-action-btn:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.messages-stream {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.antigravity-hero {
    margin: auto;
    max-width: 620px;
    text-align: center;
    padding: 40px 20px;
}

.hero-logo-glow {
    font-size: 38px;
    color: var(--agy-blue);
    text-shadow: 0 0 24px rgba(66, 133, 244, 0.6);
    margin-bottom: 12px;
}

.antigravity-hero h1 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.antigravity-hero p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 28px;
}

.prompt-starters {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.starter-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 14px;
    text-align: left;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: all 0.2s;
}

.starter-card:hover {
    border-color: var(--agy-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(66, 133, 244, 0.15);
}

.card-icon {
    font-size: 18px;
    margin-bottom: 4px;
}

.card-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-desc {
    font-size: 11px;
    color: var(--text-muted);
}

/* Chat Messages */
.message-bubble {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-width: 85%;
}

.message-bubble.user {
    align-self: flex-end;
}

.message-bubble.user .bubble-body {
    background: #192233;
    border: 1px solid #283754;
    border-radius: 12px 12px 2px 12px;
    padding: 12px 16px;
    color: #fff;
    font-size: 14px;
}

.message-bubble.assistant {
    align-self: flex-start;
    max-width: 90%;
}

.message-bubble.assistant .bubble-body {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 12px 12px 12px 2px;
    padding: 18px 20px;
    font-size: 14px;
    line-height: 1.6;
}

.message-bubble.assistant .bubble-body pre {
    background: #090b10;
    border: 1px solid var(--border-subtle);
    padding: 12px;
    border-radius: 8px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 13px;
    margin: 12px 0;
}

/* Antigravity Tool Lens & Diff Card */
.tool-step-card {
    background: #0f131f;
    border-left: 3px solid var(--agy-blue);
    border-radius: 6px;
    padding: 10px 14px;
    font-family: var(--font-mono);
    font-size: 12px;
    margin: 6px 0;
}

.tool-step-card.diff-card {
    border-left-color: var(--agy-green);
    background: #0b141a;
}

.diff-view {
    background: #05080c;
    border: 1px solid var(--border-subtle);
    padding: 10px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 12px;
    margin-top: 8px;
    white-space: pre-wrap;
}

.diff-add {
    color: #34d399;
    background: rgba(16, 185, 129, 0.1);
}

.diff-del {
    color: #f87171;
    background: rgba(239, 68, 68, 0.1);
}

/* Antigravity Thought Accordion */
.thought-accordion {
    background: #111422;
    border: 1px solid rgba(157, 78, 221, 0.3);
    border-radius: 8px;
    padding: 10px 14px;
    font-size: 13px;
    color: #c084fc;
    margin: 6px 0;
}

.thought-header {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    cursor: pointer;
}

.thought-pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--agy-purple);
    box-shadow: 0 0 8px var(--agy-purple);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: scale(0.9); opacity: 0.7; }
    50% { transform: scale(1.1); opacity: 1; }
    100% { transform: scale(0.9); opacity: 0.7; }
}

/* Composer */
.composer-container {
    padding: 16px 24px;
    position: relative;
    background: var(--bg-root);
}

.slash-menu {
    position: absolute;
    bottom: 100%;
    left: 24px;
    right: 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: 8px;
    padding: 8px 0;
    box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.5);
    z-index: 20;
}

.slash-menu.hidden {
    display: none;
}

.slash-header {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    padding: 4px 14px;
    letter-spacing: 0.5px;
}

.slash-item {
    padding: 8px 14px;
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.slash-item:hover {
    background: var(--bg-card-hover);
}

.slash-cmd {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    color: var(--agy-blue);
    min-width: 60px;
}

.slash-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.composer-toolbar {
    margin-bottom: 6px;
}

.chips-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.composer-chip {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-family: var(--font-mono);
    cursor: pointer;
    transition: all 0.2s;
}

.composer-chip:hover {
    border-color: var(--agy-blue);
    color: var(--agy-blue);
}

.divider {
    width: 1px;
    height: 12px;
    background: var(--border-subtle);
}

.chip-text {
    font-size: 11px;
    color: var(--text-muted);
}

.composer-card {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: 12px;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: all 0.2s;
}

.composer-card:focus-within {
    border-color: var(--agy-blue);
    box-shadow: 0 0 16px rgba(66, 133, 244, 0.25);
}

.composer-card textarea {
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: var(--font-sans);
    resize: none;
    outline: none;
}

.composer-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.permission-pill {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: var(--text-muted);
}

.send-action-btn {
    background: linear-gradient(135deg, var(--agy-blue), var(--agy-purple));
    border: none;
    color: #fff;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: opacity 0.2s;
}

.send-action-btn:hover {
    opacity: 0.9;
}

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

/* 4. Right Auxiliary Pane */
.auxiliary-pane {
    background: var(--bg-sidebar);
    border-left: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
}

.aux-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-subtle);
}

.aux-tab {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 12px 6px;
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.aux-tab.active {
    color: var(--text-primary);
    border-bottom-color: var(--agy-blue);
    background: rgba(66, 133, 244, 0.05);
}

.tab-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.tab-dot.purple { background: var(--agy-purple); }
.tab-dot.green { background: var(--agy-green); }
.tab-dot.blue { background: var(--agy-blue); }
.tab-dot.amber { background: var(--agy-amber); }

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

.tab-view {
    display: none;
}

.tab-view.active {
    display: block;
}

.pane-title-bar {
    margin-bottom: 12px;
}

.pane-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.thoughts-feed {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.empty-feed {
    text-align: center;
    padding: 40px 10px;
    color: var(--text-muted);
}

.feed-icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.empty-feed p {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.empty-feed span {
    font-size: 11px;
    line-height: 1.4;
}

.thought-card {
    background: var(--bg-card);
    border-left: 3px solid var(--agy-purple);
    border-radius: 6px;
    padding: 10px 12px;
    font-size: 12px;
    color: #e2e8f0;
    line-height: 1.5;
}

.terminal-screen {
    background: #06080d;
    border: 1px solid var(--border-subtle);
    padding: 14px;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--agy-green);
    white-space: pre-wrap;
    overflow-x: auto;
    line-height: 1.6;
}

.artifact-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.card-badge {
    align-self: flex-start;
    font-size: 10px;
    font-weight: 700;
    background: rgba(66, 133, 244, 0.15);
    color: var(--agy-blue);
    padding: 2px 6px;
    border-radius: 4px;
}

.artifact-card h4 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
}

.artifact-card p {
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Modal Overlay & Card */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.modal-overlay.hidden {
    display: none;
}

.modal-card {
    background: var(--bg-card);
    border: 1px solid var(--border-accent);
    border-radius: 14px;
    width: 90%;
    max-width: 480px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.8);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.modal-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 16px;
    cursor: pointer;
}

.modal-close-btn:hover {
    color: var(--text-primary);
}

.modal-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.preview-address-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    background: #080b12;
    border: 1px solid var(--border-subtle);
    padding: 6px 12px;
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--agy-blue);
    margin-bottom: 12px;
}

.preview-frame-wrap {
    background: #000;
    border: 1px solid var(--border-accent);
    border-radius: 8px;
    height: 480px;
    overflow: hidden;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
}

.preview-frame {
    width: 100%;
    height: 100%;
    border: none;
    background: #0b0d14;
}

.aux-action-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    color: var(--text-secondary);
    border-radius: 4px;
    padding: 3px 8px;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s;
}

.aux-action-btn:hover {
    color: var(--text-primary);
    border-color: var(--agy-blue);
}

.project-badge-card {
    background: var(--bg-card);
    border: 1px solid rgba(16, 185, 129, 0.3);
    padding: 10px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    transition: all 0.2s;
}

.project-badge-card:hover {
    border-color: var(--agy-green);
    background: rgba(16, 185, 129, 0.08);
}

.project-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--agy-green);
    box-shadow: 0 0 8px var(--agy-green);
    flex-shrink: 0;
}

.project-info {
    display: flex;
    flex-direction: column;
}

.project-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.project-status-text {
    font-size: 10px;
    color: var(--agy-green);
}

.project-showcase-box {
    background: linear-gradient(135deg, rgba(66, 133, 244, 0.1), rgba(16, 185, 129, 0.1));
    border: 1px solid rgba(66, 133, 244, 0.35);
    border-radius: 10px;
    padding: 14px 18px;
    margin: 12px 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.project-showcase-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--agy-blue);
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-showcase-actions {
    display: flex;
    gap: 10px;
    margin-top: 4px;
}

.btn-open-live {
    background: linear-gradient(135deg, var(--agy-blue), var(--agy-purple));
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 6px 14px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn-view-preview {
    background: #1c2236;
    color: #cbd5e1;
    border: 1px solid var(--border-accent);
    border-radius: 6px;
    padding: 6px 14px;
    font-size: 12px;
    cursor: pointer;
}

/* Antigravity Collaboration Bridge Telemetry */
.telemetry-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 14px;
}

.telemetry-item {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    padding: 10px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.telemetry-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.telemetry-val {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
}

.domains-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.domain-pill {
    background: rgba(66, 133, 244, 0.08);
    border: 1px solid rgba(66, 133, 244, 0.25);
    border-radius: 6px;
    padding: 7px 10px;
    font-size: 11px;
    color: #cbd5e1;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Real-time Streaming Pulse */
.message-bubble.assistant.streaming .bubble-body::after {
    content: " ▍";
    display: inline;
    color: var(--agy-blue);
    animation: blink 0.8s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ========================================================
   Mobile View Optimization: Responsive Layout & Composer
   ======================================================== */
.mobile-nav-btn {
    display: none;
}

.mobile-backdrop {
    display: none;
}

@media (max-width: 900px) {
    html, body.antigravity-dark {
        overflow: hidden !important;
        width: 100vw !important;
        height: 100dvh !important;
        height: 100vh !important;
    }

    .antigravity-layout {
        display: flex !important;
        flex-direction: column !important;
        height: 100dvh !important;
        height: 100vh !important;
        width: 100vw !important;
        overflow: hidden !important;
        position: relative !important;
    }

    /* Hide desktop icon rail on mobile */
    .icon-rail {
        display: none !important;
    }

    /* Convert Sidebars into slide-over sheets */
    .sidebar-panel {
        position: fixed !important;
        top: 0 !important;
        bottom: 0 !important;
        left: 0 !important;
        width: 84vw !important;
        max-width: 320px !important;
        z-index: 100 !important;
        transform: translateX(-105%) !important;
        transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
        box-shadow: 12px 0 35px rgba(0, 0, 0, 0.85) !important;
        overflow-y: auto !important;
    }

    .sidebar-panel.open {
        transform: translateX(0) !important;
    }

    .auxiliary-pane {
        position: fixed !important;
        top: 0 !important;
        bottom: 0 !important;
        right: 0 !important;
        width: 88vw !important;
        max-width: 360px !important;
        z-index: 100 !important;
        transform: translateX(105%) !important;
        transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
        box-shadow: -12px 0 35px rgba(0, 0, 0, 0.85) !important;
        overflow-y: auto !important;
    }

    .auxiliary-pane.open {
        transform: translateX(0) !important;
    }

    .mobile-backdrop {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.7);
        backdrop-filter: blur(4px);
        z-index: 95;
    }

    .mobile-backdrop.active {
        display: block !important;
    }

    /* Main Chat Canvas gets 100% full width */
    .chat-canvas {
        width: 100vw !important;
        height: 100dvh !important;
        height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        overflow: hidden !important;
        position: relative !important;
    }

    .canvas-topbar {
        padding: 8px 12px !important;
        gap: 6px !important;
        flex-shrink: 0 !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        border-bottom: 1px solid var(--border-subtle) !important;
    }

    .topbar-left {
        gap: 8px !important;
    }

    .sandbox-pill {
        display: none !important;
    }

    .mobile-nav-btn {
        display: inline-flex !important;
        align-items: center;
        gap: 4px;
        padding: 6px 10px;
        font-size: 12px;
        background: #141829;
        border: 1px solid var(--border-subtle);
        border-radius: 6px;
        color: var(--text-primary);
        cursor: pointer;
    }

    .messages-stream {
        padding: 12px 12px 145px 12px !important;
        gap: 14px !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .antigravity-hero {
        padding: 20px 10px !important;
        max-width: 100% !important;
    }

    .antigravity-hero h1 {
        font-size: 22px !important;
    }

    .antigravity-hero p {
        font-size: 13px !important;
        margin-bottom: 20px !important;
    }

    .prompt-starters {
        grid-template-columns: 1fr !important;
        gap: 8px !important;
    }

    .starter-card {
        padding: 10px 12px !important;
    }

    /* Fixed Bottom Composer with Safe Area */
    .composer-container {
        position: fixed !important;
        bottom: 0 !important;
        left: 0 !important;
        right: 0 !important;
        width: 100vw !important;
        padding: 8px 10px calc(8px + env(safe-area-inset-bottom, 0px)) 10px !important;
        background: rgba(11, 13, 20, 0.96) !important;
        backdrop-filter: blur(16px) !important;
        border-top: 1px solid var(--border-subtle) !important;
        z-index: 40 !important;
        box-sizing: border-box !important;
    }

    .composer-toolbar {
        margin-bottom: 6px !important;
        width: 100% !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
        scrollbar-width: none !important;
    }

    .composer-toolbar::-webkit-scrollbar {
        display: none !important;
    }

    .chips-row {
        display: flex !important;
        gap: 6px !important;
        width: max-content !important;
    }

    .composer-chip {
        font-size: 11px !important;
        padding: 5px 10px !important;
        white-space: nowrap !important;
        border-radius: 6px !important;
        touch-action: manipulation !important;
    }

    .chip-text, .divider {
        display: none !important;
    }

    .composer-card {
        padding: 8px 10px !important;
        gap: 8px !important;
        border-radius: 12px !important;
        background: #141828 !important;
        border: 1px solid var(--border-accent) !important;
        width: 100% !important;
        box-sizing: border-box !important;
    }

    .composer-card textarea {
        font-size: 16px !important; /* 16px eliminates mobile input zoom */
        padding: 4px 6px !important;
        min-height: 42px !important;
        max-height: 100px !important;
        width: 100% !important;
        box-sizing: border-box !important;
        line-height: 1.4 !important;
    }

    .composer-actions {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
        width: 100% !important;
        gap: 8px !important;
    }

    .permission-pill {
        font-size: 11px !important;
        padding: 3px 6px !important;
    }

    .send-action-btn {
        padding: 0 16px !important;
        height: 38px !important;
        font-size: 13px !important;
        font-weight: 600 !important;
        border-radius: 8px !important;
        flex-shrink: 0 !important;
        touch-action: manipulation !important;
        display: inline-flex !important;
        align-items: center !important;
        gap: 6px !important;
    }

    .slash-menu {
        left: 10px !important;
        right: 10px !important;
        width: auto !important;
        max-height: 200px !important;
        overflow-y: auto !important;
        bottom: 100% !important;
        margin-bottom: 6px !important;
    }
}