/* ═══════════════════════════════════════════════════════════════════════
   GAIBRA — Pure Monochrome
   Only black and white. Period.
   The only color in the entire interface is the send button.
   ═══════════════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Noto+Kufi+Arabic:wght@400;500;600;700;800&family=IBM+Plex+Sans+Arabic:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&display=swap');

* {
    box-sizing: border-box;
}

/* ─── Light Mode (default) ─── */
:root, html[data-theme="light"], html:not([data-theme]) {
    --bg: #ffffff;
    --fg: #000000;
    --bg-alt: #f5f5f5;
    --fg-dim: #666666;
    --fg-faint: #999999;
    --border: #e0e0e0;
    --border-strong: #cccccc;
    --hover: #f0f0f0;
    --font-display: 'Noto Kufi Arabic', 'Inter', -apple-system, system-ui, sans-serif;
    --font-body: 'IBM Plex Sans Arabic', 'Inter', -apple-system, system-ui, sans-serif;
    --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    --send-bg: #84025F;
    --gaibra-composer-height: 140px;
}

/* ─── Dark Mode ─── */
html[data-theme="dark"] {
    --bg: #000000;
    --fg: #ffffff;
    --bg-alt: #111111;
    --fg-dim: #999999;
    --fg-faint: #666666;
    --border: #222222;
    --border-strong: #333333;
    --hover: #111111;
}

body {
    background: var(--bg) !important;
    color: var(--fg) !important;
    margin: 0;
}

/* ─── Typography ─── */
.mud-main-content, .mud-typography {
    font-family: var(--font-body) !important;
    background: var(--bg) !important;
}

/* ─── Drawer ─── */
.gaibra-drawer.mud-drawer {
    width: 280px !important;
    background: var(--bg) !important;
    border-right: 1px solid var(--border) !important;
    box-shadow: none !important;
}

[dir="rtl"] .gaibra-drawer.mud-drawer {
    border-right: none !important;
    border-left: 1px solid var(--border) !important;
}

.gaibra-drawer-header {
    padding: 16px !important;
    border-bottom: 1px solid var(--border) !important;
    background: transparent !important;
}

    .gaibra-drawer-header .mud-typography {
        color: var(--fg) !important;
        font-family: var(--font-display) !important;
        font-weight: 800 !important;
        letter-spacing: 0.05em !important;
    }

.gaibra-drawer-content {
    padding: 8px !important;
    overflow-y: auto !important;
}

    .gaibra-drawer-content::-webkit-scrollbar {
        width: 3px;
    }

    .gaibra-drawer-content::-webkit-scrollbar-thumb {
        background: var(--border-strong);
        border-radius: 3px;
    }

/* ─── Appbar ─── */
.gaibra-appbar.mud-appbar {
    background: var(--bg) !important;
    border-bottom: 1px solid var(--border) !important;
    box-shadow: none !important;
}

.gaibra-title {
    font-family: var(--font-display) !important;
    font-weight: 800 !important;
    font-size: 16px !important;
    letter-spacing: 0.05em !important;
    color: var(--fg) !important;
}

.gaibra-subtitle {
    font-size: 11px !important;
    color: var(--fg-dim) !important;
}

.mud-chip.mud-chip-text.mud-chip-size-small {
    font-size: 10px !important;
    font-weight: 600 !important;
    border-radius: 999px !important;
    color: var(--fg-dim) !important;
}

/* ─── Main ─── */
.gaibra-main-content {
    background: var(--bg) !important;
    min-height: 100vh !important;
}

/* ─── Chat Thread ─── */
.gaibra-chat-thread {
    padding: 20px 0 !important;
    display: flex !important;
    flex-direction: column !important;
    overflow-y: auto !important;
    overflow-x: hidden !important; /* FIX: prevent horizontal overflow */
    scroll-behavior: smooth;
    flex: 1;
    min-height: 0;
}

    .gaibra-chat-thread::-webkit-scrollbar {
        width: 3px;
    }

    .gaibra-chat-thread::-webkit-scrollbar-thumb {
        background: var(--border-strong);
        border-radius: 3px;
    }

/* ─── Empty State ─── */
.gaibra-empty-state {
    padding: 60px 24px !important;
    width: 100% !important; /* FIX: take full width for centering */
    min-height: 60vh !important; /* FIX: enough height to center vertically */
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    text-align: center !important;
}

.empty-state-title {
    font-family: var(--font-display) !important;
    font-size: 22px !important;
    font-weight: 700 !important;
    color: var(--fg) !important;
}

.empty-state-description {
    font-size: 15px !important;
    color: var(--fg-dim) !important;
    line-height: 1.7 !important;
    max-width: 460px !important;
    margin: 0 auto !important;
}

.empty-state-style {
    color: var(--fg-faint) !important;
}

.empty-state-cta {
    color: var(--fg-dim) !important;
}

.gaibra-empty-logo {
    width: 48px;
    height: auto;
    opacity: 0.6;
}

.gaibra-logo {
    height: 28px;
    width: auto;
}

.gaibra-brand-text {
    font-family: var(--font-display) !important;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--fg) !important;
}

.gaibra-logo-appbar {
    height: 22px;
    width: auto;
    margin-right: 6px;
}

[dir="rtl"] .gaibra-logo-appbar {
    margin-right: 0;
    margin-left: 6px;
}

/* ═══════════════════════════════════════════════════════════════════════
   MESSAGES — Pure text, no bubbles, no labels, no avatars
   ═══════════════════════════════════════════════════════════════════════ */

.message-row {
    margin-bottom: 4px !important;
    animation: msgIn 0.3s ease-out;
}

@keyframes msgIn {
    from {
        opacity: 0;
        transform: translateY(4px);
    }

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

.message-bubble.mud-paper {
    max-width: 100% !important;
    min-width: 0 !important; /* FIX: allow flex shrink below content */
    overflow: hidden !important; /* FIX: clip overflowing content */
    border-radius: 0 !important;
    transition: none !important;
}

/* Assistant — clean open text */
.message-bubble.assistant-message {
    background: transparent !important;
    border: none !important;
    box-shadow: none !important;
    padding: 8px 48px 8px 48px !important;
    margin: 0 !important;
    border-radius: 0 !important;
}

    .message-bubble.assistant-message:hover {
        background: transparent !important;
    }

    .message-bubble.assistant-message .mud-typography,
    .message-bubble.assistant-message .message-content {
        color: var(--fg) !important;
    }

/* User — subtle background band */
.message-bubble.user-message {
    background: var(--bg-alt) !important;
    border: none !important;
    box-shadow: none !important;
    padding: 12px 48px !important;
    margin: 0 !important;
    border-radius: 0 !important;
    max-width: 100% !important;
}

    .message-bubble.user-message .mud-typography,
    .message-bubble.user-message .message-content {
        color: var(--fg) !important;
    }

/* Hide avatar and author label */
.message-avatar, .message-author {
    display: none !important;
}

/* Content */
.message-content {
    font-size: 15px !important;
    line-height: 1.85 !important;
    word-wrap: break-word !important;
    overflow-wrap: break-word !important; /* FIX: modern alias for word-wrap */
    white-space: pre-wrap !important;
    min-width: 0 !important; /* FIX: critical for flex overflow containment */
    overflow-x: hidden !important; /* FIX: clip any remaining horizontal overflow */
    color: var(--fg) !important;
}

    .message-content h1, .message-content h2, .message-content h3,
    .message-content h4, .message-content h5, .message-content h6 {
        font-family: var(--font-display) !important;
        font-weight: 700;
        color: var(--fg) !important;
        margin-top: 0.8em;
        margin-bottom: 0.3em;
    }

    .message-content p {
        margin-bottom: 0.5em;
        line-height: 1.85;
        overflow-wrap: break-word;
        word-break: break-word;
    }

    .message-content ul, .message-content ol {
        margin-left: 1.5em;
        margin-bottom: 0.5em;
    }

[dir="rtl"] .message-content ul, [dir="rtl"] .message-content ol {
    margin-left: 0;
    margin-right: 1.5em;
}

.message-content code {
    padding: 2px 5px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--font-mono) !important;
    font-size: 13px;
}

.message-content pre {
    padding: 14px;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow-x: auto;
    max-width: 100%;
}

.message-content blockquote {
    border-left: 2px solid var(--fg-faint);
    padding-left: 14px;
    margin: 0.5em 0;
    color: var(--fg-dim);
}

[dir="rtl"] .message-content blockquote {
    border-left: none;
    border-right: 2px solid var(--fg-faint);
    padding-left: 0;
    padding-right: 14px;
}

.message-content table {
    border-collapse: collapse;
    margin: 0.5em 0;
    width: 100%;
    display: block;
    overflow-x: auto;
    max-width: 100%;
}

.message-content th, .message-content td {
    border: 1px solid var(--border);
    padding: 6px 10px;
    overflow-wrap: break-word;
    word-break: break-word;
}

.message-content th {
    background: var(--bg-alt);
    font-weight: 600;
}

.message-content a {
    color: var(--fg);
    text-decoration: underline;
    text-underline-offset: 3px;
    word-break: break-all;
}

.message-content img {
    max-width: 100% !important;
    height: auto !important;
}

/* Copy icon — appears on hover */
.message-copy-icon {
    opacity: 0;
    transition: opacity 0.15s;
    position: absolute;
    top: 8px;
    right: 12px;
    cursor: pointer;
    color: var(--fg-faint) !important;
}

[dir="rtl"] .message-copy-icon {
    right: auto;
    left: 12px;
}

.message-row:hover .message-copy-icon {
    opacity: 1;
}

.message-copy-icon:hover {
    color: var(--fg) !important;
}

/* Hide old action bars */
.message-actions, .export-bar {
    display: none !important;
}

/* ─── Thinking Stages ─── */
.thinking-stage {
    padding: 12px 48px;
    color: var(--fg-dim);
    font-size: 13px;
    animation: thinkPulse 1.5s ease-in-out infinite;
}

@keyframes thinkPulse {
    0%, 100% {
        opacity: 0.4;
    }

    50% {
        opacity: 1;
    }
}

.thinking-stage-text {
    font-family: var(--font-body);
}

/* Streaming indicator */
.streaming-indicator.mud-progress-linear {
    height: 1px !important;
    margin-top: 8px !important;
}

.streaming-indicator .mud-progress-linear-bar {
    background: var(--fg-faint) !important;
}

/* ─── Typing indicator override ─── */
.typing-indicator-container {
    display: none !important;
}

/* ═══════════════════════════════════════════════════════════════════════
   COMPOSER — Minimal, auto-expand
   ═══════════════════════════════════════════════════════════════════════ */

.gaibra-composer.mud-paper {
    position: relative !important;
    margin-top: auto !important;
    padding: 12px 16px !important;
    background: var(--bg) !important;
    border: none !important;
    border-top: 1px solid var(--border) !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    z-index: 20;
}

.composer-input .mud-input {
    font-family: var(--font-body) !important;
    font-size: 15px !important;
    line-height: 1.6 !important;
    color: var(--fg) !important;
    background: transparent !important;
}

    .composer-input .mud-input::placeholder {
        color: var(--fg-faint) !important;
    }

.composer-input .mud-input-root {
    background: var(--bg-alt) !important;
    border: 1px solid var(--border) !important;
    border-radius: 24px !important;
    transition: border-color 0.2s !important;
}

    .composer-input .mud-input-root:hover {
        border-color: var(--border-strong) !important;
    }

    .composer-input .mud-input-root.mud-input-root-focused {
        border-color: var(--fg-faint) !important;
        box-shadow: none !important;
    }

.composer-input textarea.mud-input {
    caret-color: var(--fg) !important;
    max-height: 25vh !important;
}

/* Send button — the ONLY color in the interface */
.send-button.mud-fab {
    background: var(--send-bg) !important;
    color: #ffffff !important;
    width: 40px !important;
    height: 40px !important;
    min-width: 40px !important;
    min-height: 40px !important;
    box-shadow: none !important;
    transition: opacity 0.2s !important;
    border-radius: 50% !important;
}

    .send-button.mud-fab:hover {
        opacity: 0.85 !important;
    }

    .send-button.mud-fab:disabled {
        opacity: 0.3 !important;
    }

.composer-footer {
    padding-top: 6px !important;
}

    .composer-footer .mud-typography {
        font-size: 10px !important;
        color: var(--fg-faint) !important;
    }

    .composer-footer .mud-icon-root {
        font-size: 11px !important;
        color: var(--fg-faint) !important;
    }

/* ─── Buttons — no buttons, only icons/links ─── */
.mud-button {
    text-transform: none !important;
    font-family: var(--font-body) !important;
    border-radius: 8px !important;
}

.mud-button-filled.mud-button-filled-primary {
    background: var(--fg) !important;
    color: var(--bg) !important;
    box-shadow: none !important;
}

    .mud-button-filled.mud-button-filled-primary:hover {
        opacity: 0.85;
    }

.mud-button-text {
    color: var(--fg) !important;
}

    .mud-button-text:hover {
        background: var(--hover) !important;
    }

.mud-icon-button {
    color: var(--fg-dim) !important;
}

    .mud-icon-button:hover {
        color: var(--fg) !important;
        background: var(--hover) !important;
    }

/* ─── Dialog ─── */
.mud-dialog {
    background: var(--bg) !important;
    border: 1px solid var(--border) !important;
    border-radius: 12px !important;
}

.mud-dialog-title {
    color: var(--fg) !important;
    font-family: var(--font-display) !important;
    border-bottom: 1px solid var(--border) !important;
}

.mud-dialog-content {
    color: var(--fg) !important;
}

.mud-dialog-actions {
    border-top: 1px solid var(--border) !important;
}

/* ─── Conversation Nav ─── */
.mud-navmenu .mud-nav-link {
    border-radius: 8px !important;
    margin-bottom: 2px !important;
}

    .mud-navmenu .mud-nav-link:hover {
        background: var(--hover) !important;
    }

    .mud-navmenu .mud-nav-link.mud-selected {
        background: var(--bg-alt) !important;
    }

.conversation-title {
    color: var(--fg) !important;
    font-weight: 500 !important;
    font-size: 13px !important;
}

.mud-nav-link-wrapper.mud-selected {
    background: var(--bg-alt) !important;
    border-radius: 8px;
}

    .mud-nav-link-wrapper.mud-selected .conversation-title {
        font-weight: 600;
    }

.conversation-actions {
    opacity: 0;
    transition: opacity 0.15s;
}

.mud-nav-link-wrapper:hover .conversation-actions {
    opacity: 1;
}

.gaibra-drawer-content .mud-navmenu {
    padding: 0 !important;
}

.conversation-rename-input input {
    font-size: 13px;
}

.chat-readonly-banner {
    border-top: 1px dashed var(--border);
}

.mud-typography.mud-typography-caption {
    color: var(--fg-faint) !important;
}

/* ═══════════════════════════════════════════════════════════════════════
   DRAG & DROP — File attachment overlay
   ═══════════════════════════════════════════════════════════════════════ */

.gaibra-drop-zone {
    position: relative;
}

.gaibra-drop-overlay {
    display: none;
    position: absolute;
    inset: 0;
    z-index: 50;
    background: rgba(0, 0, 0, 0.04);
    border: 2px dashed var(--border-strong);
    border-radius: 12px;
    pointer-events: none;
    align-items: center;
    justify-content: center;
}

html[data-theme="dark"] .gaibra-drop-overlay {
    background: rgba(255, 255, 255, 0.04);
}

.gaibra-drop-zone.drag-active .gaibra-drop-overlay {
    display: flex;
}

.gaibra-drop-overlay-content {
    background: var(--bg);
    color: var(--fg);
    padding: 16px 32px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    text-align: center;
}

/* When dragging, expand the hidden InputFile to cover drop zone.
   Browser natively handles file drop on <input type="file">,
   which fires OnChange → OnFilesSelected automatically. */
.gaibra-drop-zone.drag-active #gaibraFileInput {
    display: block !important;
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    z-index: 51;
    cursor: copy;
}

/* ═══════════════════════════════════════════════════════════════════════
   PROJECTS SIDEBAR — Tree view styles
   ═══════════════════════════════════════════════════════════════════════ */

.gaibra-project-panel.mud-expand-panel {
    background: transparent !important;
    box-shadow: none !important;
    border: 1px solid var(--border) !important;
    border-radius: 8px !important;
}

.gaibra-project-panel .mud-expand-panel-header {
    padding: 6px 10px !important;
    min-height: 36px !important;
}

.gaibra-section-item {
    border-radius: 6px;
    transition: background 0.15s;
}

    .gaibra-section-item:hover {
        background: var(--hover);
    }

.gaibra-section-active {
    background: var(--bg-alt) !important;
    border-left: 2px solid var(--fg);
}

[dir="rtl"] .gaibra-section-active {
    border-left: none;
    border-right: 2px solid var(--fg);
}

/* ─── Responsive ─── */
@media (max-width: 768px) {
    .message-bubble.assistant-message, .message-bubble.user-message {
        padding-left: 20px !important;
        padding-right: 20px !important;
    }

    .gaibra-drawer.mud-drawer {
        width: 100% !important;
        max-width: 280px !important;
    }
}

/* ─── RTL ─── */
[dir="rtl"] .gaibra-drawer.mud-drawer {
    border-right: none !important;
    border-left: 1px solid var(--border) !important;
}

[dir="rtl"] .message-content {
    direction: rtl !important;
}

/* ─── Accessibility ─── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}

.mud-button:focus-visible, .mud-icon-button:focus-visible {
    outline: 2px solid var(--fg) !important;
    outline-offset: 2px !important;
}

/* ─── Layout ─── */
.gaibra-layout {
    display: flex;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

.drawer-open .gaibra-main {
    margin-left: 280px;
}

.drawer-closed .gaibra-main {
    margin-left: 0;
}

.gaibra-chat-surface {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 56px);
    padding-bottom: var(--gaibra-composer-height);
    box-sizing: border-box;
    overflow: hidden;
}

.gaibra-composer-wrapper {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
    display: flex;
    justify-content: center;
    padding: 0;
    box-sizing: border-box;
    transition: margin-left 0.25s ease;
}

    .gaibra-composer-wrapper > * {
        width: 100%;
        max-width: 780px;
    }

.drawer-open .gaibra-composer-wrapper {
    margin-left: 280px;
}

.drawer-closed .gaibra-composer-wrapper {
    margin-left: 0;
}

#chatEndAnchor {
    height: 40px !important;
    display: block !important;
}

/* ─── Code LTR ─── */
pre, code, pre code {
    direction: ltr !important;
    text-align: left !important;
    unicode-bidi: isolate !important;
    font-family: var(--font-mono);
}

.gaibra-mermaid-wrap svg {
    max-width: 100%;
    height: auto;
}

/* ─── Print ─── */
@media print {
    .gaibra-drawer, .gaibra-appbar, .gaibra-composer-wrapper, .mud-drawer, .mud-appbar {
        display: none !important;
    }

    .gaibra-layout, .gaibra-main-content, .gaibra-chat-surface {
        display: block !important;
        height: auto !important;
        overflow: visible !important;
    }

    .message-bubble.user-message {
        background: #f5f5f5 !important;
    }

    @page {
        size: A4;
        margin: 15mm;
    }
}