/* ================================================================
   BEACON ASSISTANT — Precision Instrument Chat Panel
   ================================================================
   A persistent AI assistant surface that sits at the bottom of every
   page. Collapsed: a sleek command bar. Expanded: an immersive chat
   panel. Feels like a Bloomberg terminal meets iMessage.
   ================================================================ */

/* Fonts loaded via <link> in base.html head for non-render-blocking load */

/* --- Theme tokens --- */
:root {
    --ba-font-body: 'DM Sans', system-ui, sans-serif;
    --ba-font-mono: 'JetBrains Mono', ui-monospace, monospace;

    /* Light mode */
    --ba-bg-panel: #f8f7f5;
    --ba-bg-bar: #eae8e4;
    --ba-bg-msg-ai: #ffffff;
    --ba-bg-msg-user: #1a1a1a;
    --ba-text: #1a1a1a;
    --ba-text-user: #f5f5f5;
    --ba-text-muted: #8a8580;
    --ba-text-ai-accent: #b5713a;
    --ba-border: #d8d4cf;
    --ba-accent: #d4874a;
    --ba-accent-glow: rgba(212, 135, 74, 0.15);
    --ba-accent-hover: #c07a3e;
    --ba-chip-bg: #f0ece7;
    --ba-chip-border: #d8d4cf;
    --ba-chip-hover: #d4874a;
    --ba-entity-bg: #faf6f1;
    --ba-entity-border: #e8ddd0;
    --ba-shadow: 0 -4px 32px rgba(0,0,0,0.08), 0 -1px 4px rgba(0,0,0,0.04);
    --ba-input-bg: #ffffff;
    --ba-scrollbar-track: transparent;
    --ba-scrollbar-thumb: #d0ccc7;
}

[data-theme="dark"] {
    --ba-bg-panel: #141413;
    --ba-bg-bar: #1c1b1a;
    --ba-bg-msg-ai: #1e1d1c;
    --ba-bg-msg-user: #2a2520;
    --ba-text: #e8e4df;
    --ba-text-user: #e8e4df;
    --ba-text-muted: #6b6560;
    --ba-text-ai-accent: #d4974a;
    --ba-border: #2a2826;
    --ba-accent: #d4874a;
    --ba-accent-glow: rgba(212, 135, 74, 0.08);
    --ba-accent-hover: #e09555;
    --ba-chip-bg: #1e1d1c;
    --ba-chip-border: #333130;
    --ba-chip-hover: #d4874a;
    --ba-entity-bg: #1e1d1b;
    --ba-entity-border: #332e28;
    --ba-shadow: 0 -4px 40px rgba(0,0,0,0.4), 0 -1px 4px rgba(0,0,0,0.2);
    --ba-input-bg: #1a1918;
    --ba-scrollbar-thumb: #333130;
}

/* --- Container --- */
.beacon-assistant {
    font-family: var(--ba-font-body);
    -webkit-font-smoothing: antialiased;
}

/* In split layout: chat panel fills its flex column */
.beacon-split-chat {
    font-family: var(--ba-font-body);
    -webkit-font-smoothing: antialiased;
    position: relative; /* popover anchor */
}
.beacon-split-chat .ba-messages {
    flex: 1;
    overflow-y: auto;
}
.beacon-split-chat .beacon-assistant-bar {
    flex-shrink: 0;
}
.beacon-split-chat .beacon-assistant-panel {
    display: contents; /* panel is always open in split mode */
}

/* Mobile bottom bar positioning */
.beacon-assistant-mobile {
    font-family: var(--ba-font-body);
    -webkit-font-smoothing: antialiased;
}

/* --- Collapsed Bar --- */
.beacon-assistant-bar {
    background: var(--ba-bg-bar);
    border-top: 1px solid var(--ba-border);
    padding: 0;
    position: relative;
}

.beacon-assistant-bar::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 48px;
    height: 2px;
    background: var(--ba-accent);
    border-radius: 1px;
    opacity: 0.5;
}

.ba-bar-inner {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

.ba-expand-btn {
    background: none !important;
    border: none !important;
    color: var(--ba-text-muted);
    cursor: pointer;
    padding: 0.35rem !important;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    width: 32px !important;
    height: 32px !important;
    flex-shrink: 0;
    margin: 0 !important;
}
.ba-expand-btn:hover {
    background: var(--ba-accent-glow);
    color: var(--ba-accent);
}
.ba-expand-btn svg {
    width: 16px;
    height: 16px;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.ba-expand-btn.is-expanded svg {
    transform: rotate(180deg);
}

.ba-input-wrap {
    flex: 1;
    position: relative;
}
.ba-input {
    width: 100% !important;
    background: var(--ba-input-bg) !important;
    border: 1px solid var(--ba-border) !important;
    border-radius: 8px !important;
    padding: 0.55rem 0.85rem !important;
    font-family: var(--ba-font-mono) !important;
    font-size: 0.82rem !important;
    font-weight: 400;
    color: var(--ba-text) !important;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    margin: 0 !important;
    line-height: 1.4;
    resize: none;
    overflow-y: hidden;
    display: block;
    min-height: calc(0.82rem * 1.4 + 0.55rem * 2 + 2px);
    max-height: 200px;
}
textarea.ba-input {
    vertical-align: middle;
}
.ba-input::placeholder {
    color: var(--ba-text-muted);
    font-family: var(--ba-font-mono);
    font-weight: 400;
}
.ba-input:focus {
    border-color: var(--ba-accent);
    box-shadow: 0 0 0 3px var(--ba-accent-glow);
}

/* --- @mention dropdown --- */
.ba-mention-dropdown {
    position: absolute;
    bottom: calc(100% + 4px);
    left: 0;
    right: 0;
    background: var(--ba-bg-panel);
    border: 1px solid var(--ba-border);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    max-height: 220px;
    overflow-y: auto;
    z-index: 50;
    padding: 4px;
}
.ba-mention-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    width: 100%;
    padding: 6px 8px;
    background: transparent;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    text-align: left;
    font-family: var(--ba-font-mono);
    font-size: 0.8rem;
    color: var(--ba-text);
}
.ba-mention-row.is-active {
    background: var(--ba-accent-glow);
}
.ba-mention-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.ba-mention-status {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.7rem;
    color: var(--ba-text-muted);
    flex-shrink: 0;
}
.ba-mention-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ba-text-muted);
}
.ba-mention-status.is-linked .ba-mention-dot {
    background: #4a9c5f;
}
.ba-mention-status.is-linked {
    color: #4a9c5f;
}

/* Mobile-only affordance: visually lives inside .beacon-assistant-mobile
   (display:none on desktop), so no additional media query is needed. */
.ba-mention-btn {
    background: var(--ba-input-bg);
    color: var(--ba-text);
    border: 1px solid var(--ba-border);
    border-radius: 8px;
    font-family: var(--ba-font-mono);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1;
    width: 38px;
    min-width: 38px;
    min-height: 38px;
    padding: 0;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.15s, border-color 0.15s;
    margin: 0;
}
.ba-mention-btn:hover:not(:disabled),
.ba-mention-btn:active:not(:disabled) {
    background: var(--ba-accent-glow);
    border-color: var(--ba-accent);
    color: var(--ba-accent);
}
.ba-mention-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.ba-send-btn {
    background: var(--ba-accent) !important;
    color: #fff !important;
    border: none !important;
    border-radius: 8px !important;
    padding: 0.55rem 1rem !important;
    font-family: var(--ba-font-body) !important;
    font-size: 0.8rem !important;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
    width: auto !important;
    margin: 0 !important;
    flex-shrink: 0;
}
.ba-send-btn:hover:not(:disabled) {
    background: var(--ba-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(212, 135, 74, 0.3);
}
.ba-send-btn:active:not(:disabled) {
    transform: translateY(0);
}
.ba-send-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* --- Expanded Panel --- */
.beacon-assistant-panel {
    background: var(--ba-bg-panel);
    box-shadow: var(--ba-shadow);
    border-top: 1px solid var(--ba-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.34, 1.02, 0.64, 1);
}
.beacon-assistant-panel.is-open {
    max-height: 60vh;
}

.ba-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--ba-border);
}
.ba-panel-title {
    font-family: var(--ba-font-body);
    font-size: 0.825rem;
    font-weight: 600;
    color: var(--ba-text-muted);
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.ba-panel-actions {
    display: flex;
    gap: 0.2rem;
}
.ba-panel-action {
    background: none;
    border: 1px solid var(--ba-border);
    color: var(--ba-text-muted);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-family: var(--ba-font-body);
    font-size: 0.55rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    width: auto;
    margin: 0;
}
.ba-panel-action:hover {
    border-color: var(--ba-accent);
    color: var(--ba-accent);
    background: var(--ba-accent-glow);
}

/* --- Messages Area --- */
.ba-messages {
    overflow-y: auto;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    min-height: 55vh;
    max-height: calc(72vh - 100px);
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--ba-scrollbar-thumb) var(--ba-scrollbar-track);
}
.ba-messages::-webkit-scrollbar {
    width: 5px;
}
.ba-messages::-webkit-scrollbar-track {
    background: var(--ba-scrollbar-track);
}
.ba-messages::-webkit-scrollbar-thumb {
    background: var(--ba-scrollbar-thumb);
    border-radius: 3px;
}

/* --- Empty state (no messages) --- */
.ba-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem 1rem;
    margin: auto;
    color: var(--ba-text-muted);
}

/* --- Message Bubbles --- */
.ba-msg {
    max-width: 85%;
    animation: ba-msg-in 0.25s ease-out both;
    position: relative;
}
@keyframes ba-msg-in {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.ba-msg-ai {
    align-self: flex-start;
    background: var(--ba-bg-msg-ai);
    border: 1px solid var(--ba-border);
    border-radius: 2px 12px 12px 12px;
    padding: 0.7rem 0.9rem;
    position: relative;
}
.ba-msg-ai::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--ba-accent);
    border-radius: 2px 0 0 2px;
}

.ba-msg-user {
    align-self: flex-end;
    background: var(--ba-bg-msg-user);
    color: var(--ba-text-user);
    border-radius: 12px 12px 2px 12px;
    padding: 0.7rem 0.9rem;
}

.ba-msg-content {
    font-size: var(--ba-msg-size, 0.85rem);
    line-height: 1.55;
    color: inherit;
}
.ba-msg-content p { margin: 0 0 0.4rem; }
.ba-msg-content p:last-child { margin-bottom: 0; }
.ba-msg-content h1, .ba-msg-content h2, .ba-msg-content h3 {
    font-size: 0.9rem;
    font-weight: 600;
    margin: 0.5rem 0 0.25rem;
    border: none;
    padding: 0;
}
.ba-msg-content strong { font-weight: 600; }
.ba-msg-content a {
    color: var(--ba-accent);
    text-decoration: underline;
    text-decoration-color: rgba(212, 135, 74, 0.3);
    text-underline-offset: 2px;
}
.ba-msg-content a:hover {
    text-decoration-color: var(--ba-accent);
}

.ba-msg-time {
    position: absolute;
    top: 100%;
    margin-top: 1px;
    font-size: 0.6rem;
    line-height: 1;
    color: var(--ba-text-muted);
    font-family: var(--ba-font-mono);
    letter-spacing: 0.02em;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.15s ease;
    z-index: 1;
}
.ba-msg-ai .ba-msg-time { left: 0.9rem; }
.ba-msg-user .ba-msg-time {
    right: 0.9rem;
    color: var(--ba-text-muted);
}
.ba-msg:hover .ba-msg-time,
.ba-msg-time.is-revealed {
    opacity: 0.75;
}

/* --- Message Actions (feedback, undo) --- */
.ba-msg-actions {
    display: flex;
    gap: 0.15rem;
    margin-top: 0.35rem;
    align-items: center;
}
.ba-feedback-label {
    font-size: 0.7rem;
    color: var(--ba-text-muted);
    margin-right: 0.3rem;
}
.ba-feedback-btn {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.75rem;
    opacity: 0.25;
    padding: 0.15rem 0.2rem;
    width: auto;
    margin: 0;
    transition: opacity 0.15s, transform 0.1s;
    line-height: 1;
}
.ba-feedback-btn:hover { opacity: 0.6; }
.ba-feedback-btn.is-active { opacity: 1; }
.ba-feedback-btn:active { transform: scale(0.9); }

.ba-undo-btn {
    background: none;
    border: 1px solid var(--ba-border);
    color: var(--ba-text-muted);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-family: var(--ba-font-mono);
    font-size: 0.68rem;
    cursor: pointer;
    transition: all 0.15s;
    width: auto;
    margin: 0 0 0 0.25rem;
}
.ba-undo-btn:hover {
    border-color: var(--ba-accent);
    color: var(--ba-accent);
}

/* --- Entity Card (created task/project) --- */
.ba-entity-card {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    padding: 0.45rem 0.75rem;
    background: var(--ba-entity-bg);
    border: 1px solid var(--ba-entity-border);
    border-radius: 8px;
    text-decoration: none;
    color: var(--ba-text);
    font-size: 0.78rem;
    font-weight: 500;
    transition: all 0.15s;
}
.ba-entity-card:hover {
    border-color: var(--ba-accent);
    background: var(--ba-accent-glow);
    transform: translateX(2px);
}
.ba-entity-card-icon {
    font-size: 0.85rem;
    opacity: 0.6;
}
.ba-entity-card-label {
    font-family: var(--ba-font-mono);
    font-size: 0.72rem;
    color: var(--ba-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.ba-entity-card-arrow {
    color: var(--ba-accent);
    font-size: 0.75rem;
    margin-left: auto;
    transition: transform 0.15s;
}
.ba-entity-card:hover .ba-entity-card-arrow {
    transform: translateX(3px);
}

/* --- Suggested Reply Chips --- */
.ba-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    padding: 0.5rem 1rem 0.25rem;
    border-top: 1px solid var(--ba-border);
}
.ba-chip {
    background: var(--ba-chip-bg);
    border: 1px solid var(--ba-chip-border);
    color: var(--ba-text);
    padding: 0.3rem 0.7rem;
    border-radius: 100px;
    font-family: var(--ba-font-body);
    font-size: 0.76rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    width: auto;
    margin: 0;
    white-space: nowrap;
}
.ba-chip:hover:not(:disabled) {
    background: var(--ba-accent);
    border-color: var(--ba-accent);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(212, 135, 74, 0.2);
}
.ba-chip:active:not(:disabled) {
    transform: translateY(0);
}
.ba-chip:disabled {
    opacity: 0.4;
    cursor: wait;
}

/* --- Loading indicator --- */
.ba-loading {
    display: flex;
    gap: 4px;
    padding: 0.5rem 0;
    align-self: flex-start;
}
.ba-loading-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ba-accent);
    animation: ba-bounce 1.2s ease-in-out infinite;
}
.ba-loading-dot:nth-child(2) { animation-delay: 0.15s; }
.ba-loading-dot:nth-child(3) { animation-delay: 0.3s; }
@keyframes ba-bounce {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .beacon-assistant-panel.is-open {
        max-height: 80vh;
    }
    .ba-messages {
        max-height: calc(80vh - 100px);
    }
    .ba-msg {
        max-width: 92%;
    }
    .ba-bar-inner {
        padding: 0.5rem 0.75rem;
    }
}

/* Keyboard hint removed — was confusing in context */

/* --- Mobile expanded panel --- */
.ba-mobile-panel {
    background: var(--ba-bg-panel);
    border-top: 1px solid var(--ba-border);
    box-shadow: var(--ba-shadow);
    display: flex;
    flex-direction: column;
    max-height: 70vh;
    overflow: hidden;
}
.ba-mobile-panel .ba-messages {
    flex: 1;
    overflow-y: auto;
    max-height: calc(70vh - 90px);
}

/* --- Conversation history list --- */
.ba-history-item {
    padding: 0.55rem 0.75rem;
    border-bottom: 1px solid var(--ba-border);
    cursor: pointer;
    transition: background 0.1s;
}
.ba-history-item:hover {
    background: var(--ba-accent-glow);
}

/* --- Desktop sidebar offset --- */
@media (min-width: 1024px) {
    .beacon-assistant {
        left: var(--beacon-sidebar-width, 240px);
    }
    .sidebar-collapsed .beacon-assistant {
        left: var(--beacon-sidebar-collapsed-width, 64px);
    }
}

/* --- Chat settings popover --- */
.ba-panel-action-icon {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    padding: 0 !important;
    line-height: 1;
    width: 1.5rem;
    height: 1.5rem;
    box-sizing: border-box;
}
.ba-panel-action-icon svg {
    display: block;
    width: 0.7rem;
    height: 0.7rem;
}
.ba-settings-popover {
    position: absolute;
    top: 3rem;
    right: 0.75rem;
    z-index: 20;
    background: var(--ba-bg-panel);
    border: 1px solid var(--ba-border);
    border-radius: 10px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
    padding: 0.85rem 0.9rem;
    min-width: 220px;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}
.ba-settings-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.ba-settings-label {
    font-family: var(--ba-font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ba-text-muted);
}
.ba-settings-options {
    display: flex;
    gap: 0.3rem;
}
.ba-settings-options button {
    flex: 1;
    background: transparent !important;
    border: 1px solid var(--ba-border) !important;
    color: var(--ba-text) !important;
    border-radius: 6px !important;
    padding: 0.4rem 0.5rem !important;
    font-family: var(--ba-font-body) !important;
    font-size: 0.75rem !important;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    margin: 0 !important;
}
.ba-settings-options button:hover {
    border-color: var(--ba-accent) !important;
    color: var(--ba-accent) !important;
}
.ba-settings-options button.is-active {
    background: var(--ba-accent) !important;
    border-color: var(--ba-accent) !important;
    color: #fff !important;
}

/* --- Below-input area (quick replies + starters) --- */
.ba-below-input {
    flex: 1 1 auto;
    padding: 0.85rem 1rem 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    overflow-y: auto;
    min-height: 0;
}
.ba-below-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}
.ba-below-label {
    font-family: var(--ba-font-mono);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ba-text-muted);
    opacity: 0.75;
}
.ba-below-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}
.ba-starter-chip {
    background: transparent !important;
    border: 1px solid var(--ba-border) !important;
    color: var(--ba-text) !important;
    border-radius: 999px !important;
    padding: 0.4rem 0.75rem !important;
    font-family: var(--ba-font-body) !important;
    font-size: 0.72rem !important;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
    margin: 0 !important;
    line-height: 1.3;
}
.ba-starter-chip:hover {
    border-color: var(--ba-accent) !important;
    color: var(--ba-accent) !important;
    background: var(--ba-accent-glow) !important;
    transform: translateY(-1px);
}
.ba-starter-chip:active {
    transform: translateY(0);
}