/* ═══════════════════════════════════════════════════════════════════════════
   CoreBIM AI — Chat CSS
   Faithful replica of the PageIndex chat design
   Fonts: Funnel Sans (display) + Zalando Sans (text), self-hosted, see fonts.css
   Icons: Lucide
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Design Tokens ────────────────────────────────────────────────────────── */
:root {
    --font-sans: var(--font-text, system-ui, sans-serif);

    /* Sidebar (follows the theme tokens) */
    --sidebar-width: 260px;
    --sidebar-bg: var(--surface-2);
    --sidebar-border: var(--hairline);
    --sidebar-text: var(--ink);
    --sidebar-text-muted: var(--ink-3);
    --sidebar-hover: color-mix(in srgb, var(--ink) 6%, transparent);
    --sidebar-active: color-mix(in srgb, var(--ink) 10%, transparent);
    --sidebar-icon: var(--ink-3);

    /* Main area */
    --main-bg: var(--paper);
    --main-text: var(--ink);
    --main-text-muted: var(--ink-3);
    --main-border: var(--hairline);

    /* Input */
    --input-bg: var(--surface-2);
    --input-border: var(--hairline-strong);
    --input-focus-border: var(--ink-3);

    /* Accent */
    --accent: var(--signal);
    --accent-hover: var(--brand-dark);
    --accent-text: var(--signal-ink);

    /* Messages */
    --msg-user-bg: var(--surface-2);
    --msg-user-text: var(--ink);
    --msg-assistant-text: var(--ink);
    --msg-code-bg: var(--surface-2);
    --msg-code-border: var(--hairline);

    /* UI */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* Topbar */
    --topbar-height: 56px;

    /* Transitions */
    --transition: 0.18s ease;
}

/* Dark theme: the tokens in tokens.css flip per theme, so no overrides are needed here. */

/* ── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { height: 100%; font-size: 15px; }

body {
    font-family: var(--font-sans);
    height: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea { font-family: inherit; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
svg { display: block; flex-shrink: 0; }

/* ── Chat App Layout ──────────────────────────────────────────────────────── */
.chat-app {
    display: flex;
    height: 100vh;
    overflow: hidden;
    background: var(--main-bg);
    color: var(--main-text);
}

/* ── Sidebar ──────────────────────────────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    background: var(--sidebar-bg);
    border-right: 1px solid var(--sidebar-border);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    transition: transform var(--transition), width var(--transition);
    position: relative;
    z-index: 100;
}

/* Sidebar header */
.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 12px 10px;
    gap: 8px;
    flex-shrink: 0;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 8px;
    border-radius: var(--radius-md);
    transition: background var(--transition);
    min-width: 0;
}
.sidebar-logo:hover { background: var(--sidebar-hover); }
.sidebar-logo svg { flex-shrink: 0; }

.sidebar-logo-text {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--sidebar-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Sidebar new chat */
.sidebar-new-chat {
    padding: 4px 10px 8px;
    flex-shrink: 0;
}

.btn-new-chat {
    display: flex;
    align-items: center;
    gap: 9px;
    width: 100%;
    padding: 9px 12px;
    border-radius: var(--radius-md);
    color: var(--sidebar-text);
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--sidebar-hover);
    border: 1px solid var(--sidebar-border);
    transition: background var(--transition), border-color var(--transition);
}
.btn-new-chat:hover {
    background: var(--sidebar-active);
    border-color: var(--hairline-strong);
}
.btn-new-chat svg { width: 16px; height: 16px; color: var(--sidebar-icon); }

/* Sidebar search */
.sidebar-search {
    padding: 0 10px 6px;
    flex-shrink: 0;
}

.search-input-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.search-icon {
    position: absolute;
    left: 10px;
    width: 14px;
    height: 14px;
    color: var(--sidebar-icon);
    pointer-events: none;
}
.search-input-wrap input {
    width: 100%;
    padding: 7px 10px 7px 32px;
    background: var(--sidebar-hover);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--sidebar-text);
    font-size: 0.8125rem;
    transition: border-color var(--transition), background var(--transition);
    outline: none;
}
.search-input-wrap input::placeholder { color: var(--sidebar-text-muted); }
.search-input-wrap input:focus {
    background: color-mix(in srgb, var(--ink) 8%, transparent);
    border-color: var(--hairline-strong);
}

/* Sidebar nav / history */
.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 4px 6px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--hairline-strong) transparent;
}
.sidebar-nav::-webkit-scrollbar { width: 4px; }
.sidebar-nav::-webkit-scrollbar-track { background: transparent; }
.sidebar-nav::-webkit-scrollbar-thumb { background: var(--hairline-strong); border-radius: 4px; }

/* History section labels */
.history-section-label {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--sidebar-text-muted);
    padding: 10px 10px 4px;
}

/* History item */
.history-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition);
    position: relative;
    min-height: 36px;
    overflow: hidden;
}
.history-item:hover { background: var(--sidebar-hover); }
.history-item.active { background: var(--sidebar-active); }

.history-item-title {
    font-size: 0.8125rem;
    color: var(--sidebar-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    line-height: 1.4;
}
.history-item-delete {
    opacity: 0;
    transition: opacity var(--transition);
    padding: 3px;
    border-radius: 4px;
    color: var(--sidebar-icon);
    flex-shrink: 0;
}
.history-item:hover .history-item-delete { opacity: 1; }
.history-item-delete:hover { background: var(--bad); color: var(--bad-ink); }
.history-item-delete svg { width: 13px; height: 13px; }

/* Skeleton loading */
.chat-history-loading { padding: 6px 10px; }
.skeleton-line {
    height: 14px;
    background: linear-gradient(90deg, var(--surface-2) 25%, var(--hairline) 50%, var(--surface-2) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    border-radius: 4px;
    margin-bottom: 10px;
}
.skeleton-line.short { width: 60%; }
@keyframes shimmer { 0% { background-position: 200% 0 } 100% { background-position: -200% 0 } }

/* No history */
.history-empty {
    padding: 20px 10px;
    text-align: center;
    color: var(--sidebar-text-muted);
    font-size: 0.8125rem;
}

/* Sidebar footer */
.sidebar-footer {
    flex-shrink: 0;
    padding: 0 6px 8px;
}
.sidebar-divider {
    height: 1px;
    background: var(--sidebar-border);
    margin: 0 4px 10px;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    transition: background var(--transition);
}
.user-profile:hover { background: var(--sidebar-hover); }

.user-avatar {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    background: var(--accent);
    color: var(--signal-ink);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    flex-shrink: 0;
    text-transform: uppercase;
}

.user-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
}
.user-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--sidebar-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.user-role {
    font-size: 0.6875rem;
    color: var(--sidebar-text-muted);
}

.user-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    flex-shrink: 0;
}

/* Icon buttons */
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-sm);
    color: var(--sidebar-icon);
    transition: background var(--transition), color var(--transition);
    flex-shrink: 0;
}
.btn-icon svg { width: 16px; height: 16px; }
.btn-icon:hover { background: var(--sidebar-hover); color: var(--sidebar-text); }

/* ── Main Wrapper ─────────────────────────────────────────────────────────── */
.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-width: 0;
    background: var(--main-bg);
    position: relative;
}

/* ── Topbar (visible on mobile, subtle on desktop) ────────────────────────── */
.chat-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 14px;
    height: var(--topbar-height);
    border-bottom: 1px solid var(--main-border);
    background: var(--main-bg);
    position: sticky;
    top: 0;
    z-index: 50;
    flex-shrink: 0;
}

.topbar-title {
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--main-text);
}

/* On desktop, show topbar with sidebar open state indicator */
@media (min-width: 769px) {
    .chat-topbar {
        border-bottom: none;
        background: transparent;
    }
    .topbar-title { display: none; }
}

/* Main chat area */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* ── Welcome Screen ───────────────────────────────────────────────────────── */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    overflow-y: auto;
}

.welcome-inner {
    max-width: 680px;
    width: 100%;
    text-align: center;
}

.welcome-logo {
    display: inline-flex;
    margin-bottom: 20px;
}

.welcome-title {
    font-family: var(--font-display);
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--main-text);
    margin-bottom: 10px;
    letter-spacing: -0.02em;
}

.welcome-subtitle {
    font-size: 0.9375rem;
    color: var(--main-text-muted);
    line-height: 1.6;
    margin-bottom: 32px;
    max-width: 480px;
    margin-inline: auto;
}

/* Suggestion chips grid */
.suggestions-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 28px;
}

.suggestion-chip {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 14px 16px;
    background: var(--main-bg);
    border: 1px solid var(--main-border);
    border-radius: var(--radius-lg);
    color: var(--main-text);
    font-size: 0.8125rem;
    font-weight: 500;
    text-align: left;
    line-height: 1.45;
    transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
    cursor: pointer;
}
.suggestion-chip:hover {
    background: var(--input-bg);
    border-color: var(--input-focus-border);
    box-shadow: none;
}
.suggestion-chip svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    color: var(--accent);
    margin-top: 1px;
}
.suggestion-chip span { flex: 1; }
.suggestion-chip.is-locked {
    opacity: 0.55;
}
.suggestion-chip.is-locked svg {
    color: var(--ink-3);
}
.suggestion-chip.is-locked:hover {
    border-color: var(--input-border);
    box-shadow: none;
}

/* ── Messages Container ───────────────────────────────────────────────────── */
.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    scrollbar-width: thin;
    scrollbar-color: var(--hairline-strong) transparent;
}
.messages-container::-webkit-scrollbar { width: 6px; }
.messages-container::-webkit-scrollbar-track { background: transparent; }
.messages-container::-webkit-scrollbar-thumb { background: var(--hairline-strong); border-radius: 3px; }

.messages-inner {
    max-width: 760px;
    margin: 0 auto;
    padding: 24px 20px 8px;
    width: 100%;
}

/* ── Message Bubbles ──────────────────────────────────────────────────────── */
.message {
    display: flex;
    gap: 14px;
    margin-bottom: 24px;
    animation: msgAppear 0.2s ease;
}
@keyframes msgAppear {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* User message */
.message.user {
    flex-direction: row-reverse;
}
.message.user .msg-content {
    background: var(--msg-user-bg);
    border-radius: var(--radius-xl) var(--radius-xl) var(--radius-sm) var(--radius-xl);
    padding: 12px 16px;
    color: var(--msg-user-text);
    max-width: 85%;
    font-size: 0.9375rem;
    line-height: 1.6;
    word-wrap: break-word;
}

/* Assistant message */
.message.assistant .msg-content {
    flex: 1;
    color: var(--msg-assistant-text);
    font-size: 0.9375rem;
    line-height: 1.7;
    word-wrap: break-word;
    min-width: 0;
}

/* Message avatar */
.msg-avatar {
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 700;
    margin-top: 2px;
    text-transform: uppercase;
}
.message.user .msg-avatar {
    background: var(--accent);
    color: var(--signal-ink);
}
.message.assistant .msg-avatar {
    background: var(--ink);
    color: var(--paper);
}

/* ── Markdown Rendering ───────────────────────────────────────────────────── */
.msg-content h1, .msg-content h2, .msg-content h3,
.msg-content h4, .msg-content h5, .msg-content h6 {
    font-family: var(--font-display);
    font-weight: 600;
    margin: 1em 0 0.4em;
    color: var(--main-text);
    line-height: 1.3;
}
.msg-content h1 { font-size: 1.4rem; }
.msg-content h2 { font-size: 1.2rem; }
.msg-content h3 { font-size: 1.05rem; }

.msg-content p { margin-bottom: 0.75em; }
.msg-content p:last-child { margin-bottom: 0; }

.msg-content ul, .msg-content ol {
    margin: 0.4em 0 0.75em 1.4em;
    list-style: revert;
}
.msg-content li { margin-bottom: 0.25em; line-height: 1.6; }

.msg-content code {
    font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
    font-size: 0.84em;
    background: var(--msg-code-bg);
    border: 1px solid var(--msg-code-border);
    border-radius: 4px;
    padding: 0.1em 0.4em;
    color: var(--bad-ink);
}
[data-theme="dark"] .msg-content code { color: var(--bad-ink); }

.msg-content pre {
    background: var(--msg-code-bg);
    border: 1px solid var(--msg-code-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    overflow-x: auto;
    margin: 0.75em 0;
    position: relative;
}
.msg-content pre code {
    background: none;
    border: none;
    padding: 0;
    font-size: 0.85em;
    color: inherit;
}

.msg-content blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 14px;
    margin: 0.5em 0;
    color: var(--main-text-muted);
    font-style: italic;
}

.msg-content a { color: var(--accent); text-decoration: underline; }
.msg-content a:hover { color: var(--accent-hover); }

.msg-content table {
    border-collapse: collapse;
    width: 100%;
    margin: 0.75em 0;
    font-size: 0.875em;
}
.msg-content th, .msg-content td {
    border: 1px solid var(--main-border);
    padding: 8px 12px;
    text-align: left;
}
.msg-content th { background: var(--input-bg); font-weight: 600; }

.msg-content hr { border: none; border-top: 1px solid var(--main-border); margin: 1em 0; }
.msg-content strong { font-weight: 600; }
.msg-content em { font-style: italic; }

/* Streaming cursor */
.streaming-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--main-text);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: blink 0.8s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Thinking indicator */
.thinking-dots {
    display: inline-flex;
    gap: 4px;
    align-items: center;
    padding: 4px 0;
}
.thinking-dots span {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--main-text-muted);
    animation: thinkBounce 1.2s infinite ease-in-out;
}
.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }
@keyframes thinkBounce {
    0%, 80%, 100% { transform: scale(0.7); opacity: 0.4; }
    40% { transform: scale(1); opacity: 1; }
}

/* ── Input Area ───────────────────────────────────────────────────────────── */
.input-area {
    flex-shrink: 0;
    padding: 12px 20px 16px;
    background: var(--main-bg);
}

.input-container {
    max-width: 760px;
    margin: 0 auto;
}

.input-box {
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--radius-xl);
    padding: 12px 12px 8px;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.input-box:focus-within {
    border-color: var(--input-focus-border);
    box-shadow: none;
}

.chat-textarea {
    width: 100%;
    background: none;
    border: none;
    outline: none;
    color: var(--main-text);
    font-size: 0.9375rem;
    line-height: 1.6;
    resize: none;
    max-height: 240px;
    overflow-y: auto;
    scrollbar-width: thin;
    padding: 0 4px 6px;
}
.chat-textarea::placeholder { color: var(--main-text-muted); }

.input-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 4px;
}
.input-actions-left { display: flex; align-items: center; gap: 6px; }
.input-actions-right { display: flex; align-items: center; gap: 6px; }

/* Model badge */
.btn-model-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    background: var(--main-bg);
    border: 1px solid var(--main-border);
    color: var(--main-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: default;
    transition: background var(--transition);
}
.btn-model-badge svg { width: 12px; height: 12px; }

/* Send button */
.btn-send {
    width: 34px;
    height: 34px;
    border-radius: var(--radius-full);
    background: var(--accent);
    color: var(--signal-ink);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition), opacity var(--transition), transform var(--transition);
    flex-shrink: 0;
}
.btn-send svg { width: 17px; height: 17px; }
.btn-send:hover:not(:disabled) { background: var(--accent-hover); transform: scale(1.04); }
.btn-send:disabled { background: var(--hairline-strong); cursor: not-allowed; opacity: 0.7; }
[data-theme="dark"] .btn-send:disabled { background: var(--hairline-strong); }

/* Disclaimer */
.input-disclaimer {
    font-size: 0.6875rem;
    color: var(--main-text-muted);
    text-align: center;
    margin-top: 8px;
    line-height: 1.5;
}

/* ── Auth Pages ───────────────────────────────────────────────────────────── */
.auth-page {
    background: var(--main-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    font-family: var(--font-sans);
    color: var(--ink);
}

.auth-container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    background: var(--surface);
    border: 1px solid var(--hairline-strong);
    border-radius: 16px;
    padding: 40px 36px;
    box-shadow: none;
}

.auth-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 28px;
}
.auth-logo-name {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--ink);
}

.auth-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 6px;
    letter-spacing: -0.02em;
}
.auth-subtitle {
    font-size: 0.875rem;
    color: var(--ink-3);
    margin-bottom: 24px;
    line-height: 1.5;
}

.auth-error {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bad);
    border: 1px solid var(--bad-ink);
    border-radius: var(--radius-md);
    padding: 10px 14px;
    color: var(--bad-ink);
    font-size: 0.8125rem;
    margin-bottom: 16px;
}
.auth-error svg { width: 15px; height: 15px; flex-shrink: 0; }

.auth-form { display: flex; flex-direction: column; gap: 14px; }

.form-group { display: flex; flex-direction: column; gap: 5px; }

.form-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--ink-2);
}
.form-label-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.form-input {
    padding: 9px 13px;
    border: 1.5px solid var(--hairline-strong);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
    color: var(--ink);
    background: var(--surface);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
    width: 100%;
}
.form-input::placeholder { color: var(--ink-3); }
.form-input:focus {
    border-color: var(--link);
    outline: 2px solid var(--link);
    background: var(--surface);
}

.form-input-wrap { position: relative; }
.form-input-wrap .form-input { padding-right: 42px; }
.btn-password-toggle {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--ink-3);
    padding: 4px;
    border-radius: 4px;
    transition: color var(--transition);
}
.btn-password-toggle:hover { color: var(--ink-2); }
.btn-password-toggle svg { width: 17px; height: 17px; }

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.form-checkbox {
    display: flex;
    align-items: center;
    gap: 7px;
    font-size: 0.8125rem;
    color: var(--ink-2);
    cursor: pointer;
}
.form-checkbox input { accent-color: var(--link); }

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 20px;
    background: var(--accent);
    color: var(--signal-ink);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 0.9375rem;
    font-weight: 600;
    transition: background var(--transition), transform var(--transition);
    margin-top: 4px;
}
.btn-primary svg { width: 16px; height: 16px; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-full { width: 100%; }

.auth-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 20px 0;
    color: var(--ink-3);
    font-size: 0.8125rem;
}
.auth-divider::before, .auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--hairline);
}

.auth-footer-text {
    text-align: center;
    font-size: 0.8125rem;
    color: var(--ink-3);
    margin-top: 4px;
}
.auth-link { color: var(--link); font-weight: 500; }
.auth-link:hover { text-decoration: underline; }

/* ── Mobile Overlay ───────────────────────────────────────────────────────── */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--scrim);
    z-index: 99;
    backdrop-filter: blur(2px);
}
.sidebar-overlay.active { display: block; }

/* ── Sidebar collapsed state ──────────────────────────────────────────────── */
.sidebar.collapsed {
    width: 0;
    min-width: 0;
    border-right: none;
    overflow: hidden;
}

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100%;
        transform: translateX(-100%);
        z-index: 200;
    }
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    .chat-topbar { border-bottom: 1px solid var(--main-border); }
    .topbar-title { display: block; }
    .suggestions-grid { grid-template-columns: 1fr; }
    .welcome-title { font-size: 1.5rem; }
    .auth-card { padding: 28px 20px; }
    .messages-inner { padding: 16px 14px 8px; }
    .input-area { padding: 10px 14px 14px; }
}

@media (min-width: 769px) {
    .sidebar-toggle-open { display: none; }
    .sidebar-toggle-close { display: none; }
    #btnNewChatTop { display: none; }
}

/* ── Utility ──────────────────────────────────────────────────────────────── */
.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px; height: 1px;
    padding: 0; margin: -1px;
    overflow: hidden;
    clip: rect(0,0,0,0);
    white-space: nowrap;
    border: 0;
}

/* Code copy button */
.code-copy-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    padding: 4px 10px;
    background: var(--main-bg);
    border: 1px solid var(--main-border);
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    color: var(--main-text-muted);
    transition: background var(--transition), color var(--transition);
}
.code-copy-btn:hover { background: var(--input-bg); color: var(--main-text); }

/* Message actions (copy, etc.) */
.msg-actions {
    display: flex;
    gap: 4px;
    margin-top: 6px;
    opacity: 0;
    transition: opacity var(--transition);
}
.message:hover .msg-actions { opacity: 1; }
.msg-action-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    color: var(--main-text-muted);
    font-size: 0.75rem;
    transition: background var(--transition), color var(--transition);
}
.msg-action-btn svg { width: 13px; height: 13px; }
.msg-action-btn:hover { background: var(--input-bg); color: var(--main-text); }

/* Scrollbar styling for dark theme */
[data-theme="dark"] body { color: var(--main-text); }
[data-theme="dark"] .messages-container::-webkit-scrollbar-thumb { background: var(--hairline-strong); }

/* ── Document Select Screen ───────────────────────────────────────────────── */
.doc-select-screen {
    flex: 1;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 48px 20px 32px;
    overflow-y: auto;
    background: var(--main-bg);
}

.doc-select-inner {
    width: 100%;
    max-width: 720px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.doc-select-hero {
    margin-bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.doc-select-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--main-text);
    margin-bottom: 24px;
    letter-spacing: -0.01em;
    text-align: center;
}

/* Document grid */
.doc-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    width: 100%;
    margin-bottom: 14px;
}

@media (max-width: 540px) {
    .doc-grid { grid-template-columns: 1fr; }
}

/* Skeleton loaders */
.doc-grid-loading {
    display: contents;
}
.doc-card-skeleton {
    height: 100px;
    background: linear-gradient(90deg, var(--surface-2) 25%, var(--hairline) 50%, var(--surface-2) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
    border-radius: var(--radius-lg);
    border: 1px solid var(--main-border);
}
[data-theme="dark"] .doc-card-skeleton {
    background: linear-gradient(90deg, var(--surface-2) 25%, var(--hairline) 50%, var(--surface-2) 75%);
    background-size: 200% 100%;
}

/* Individual document card */
.doc-card {
    display: flex;
    align-items: stretch;
    gap: 0;
    background: var(--main-bg);
    border: 1.5px solid var(--main-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition);
    position: relative;
}
.doc-card:hover {
    border-color: var(--accent);
    box-shadow: none;
}
.doc-card.selected {
    border-color: var(--accent);
    box-shadow: none;
}

/* Thumbnail pane */
.doc-card-thumb {
    width: 68px;
    min-height: 90px;
    flex-shrink: 0;
    background: var(--surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
[data-theme="dark"] .doc-card-thumb { background: var(--surface-2); }
.doc-card-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.doc-card-thumb-placeholder,
.doc-thumb-placeholder {
    display: flex;
    flex-direction: column;
    gap: 3px;
    padding: 8px 6px;
    width: 100%;
}
.doc-thumb-line {
    height: 3px;
    border-radius: 2px;
    background: var(--hairline-strong);
}
.doc-thumb-line.short { width: 55%; }
.doc-thumb-line.med   { width: 80%; }
[data-theme="dark"] .doc-thumb-line { background: var(--hairline-strong); }

/* Info pane */
.doc-card-info {
    flex: 1;
    padding: 10px 10px 10px 12px;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.doc-card-meta {
    font-size: 0.6875rem;
    color: var(--main-text-muted);
    font-weight: 500;
}
.doc-card-name {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--main-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.doc-card-desc {
    font-size: 0.75rem;
    color: var(--main-text-muted);
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Checkbox corner */
.doc-card-check {
    position: absolute;
    top: 8px;
    right: 10px;
    width: 18px;
    height: 18px;
    border: 1.5px solid var(--hairline-strong);
    border-radius: 4px;
    background: var(--main-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: border-color var(--transition), background var(--transition);
    flex-shrink: 0;
}
.doc-card.selected .doc-card-check {
    background: var(--accent);
    border-color: var(--accent);
}
.doc-card-check svg { display: none; }
.doc-card.selected .doc-card-check svg { display: block; }

/* Upload zone */
.upload-zone {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 22px 20px;
    border: 1.5px dashed var(--hairline-strong);
    border-radius: var(--radius-lg);
    background: var(--main-bg);
    color: var(--main-text-muted);
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), color var(--transition);
    font-size: 0.875rem;
    font-weight: 500;
    outline: none;
}
.upload-zone:hover, .upload-zone:focus {
    border-color: var(--accent);
    background: color-mix(in srgb, var(--signal) 4%, transparent);
    color: var(--accent);
}
.upload-zone svg { opacity: 0.65; transition: opacity var(--transition); }
.upload-zone:hover svg, .upload-zone:focus svg { opacity: 1; }
.upload-zone input[type="file"] { display: none; }
[data-theme="dark"] .upload-zone { border-color: var(--hairline-strong); }

/* Upload progress pill */
.upload-progress-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--input-bg);
    border: 1px solid var(--main-border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--main-text-muted);
    margin-top: 10px;
    width: 100%;
    max-width: 320px;
}
.upload-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--main-border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Add Documents button in input bar ───────────────────────────────────── */
.btn-add-docs {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-sans);
    transition: border-color var(--transition), color var(--transition), background var(--transition);
    white-space: nowrap;
}
.btn-add-docs:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: color-mix(in srgb, var(--signal) 5%, transparent);
}
.btn-add-docs svg { flex-shrink: 0; }

.btn-input-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text-muted);
    transition: border-color var(--transition), color var(--transition);
}
.btn-input-icon svg { width: 15px; height: 15px; }
.btn-input-icon:hover { border-color: var(--accent); color: var(--accent); }

/* Empty state when no docs */
.doc-grid-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--main-text-muted);
    font-size: 0.8125rem;
    padding: 16px 0 8px;
}

/* ── Add Docs Badge ───────────────────────────────────────────────────────── */
.btn-add-docs { position: relative; }

.add-docs-badge {
    position: absolute;
    top: -7px;
    right: -7px;
    min-width: 17px;
    height: 17px;
    padding: 0 4px;
    border-radius: var(--radius-full);
    background: var(--accent);
    color: var(--signal-ink);
    font-size: 0.625rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
    line-height: 1;
}

/* ── Document Picker Panel ────────────────────────────────────────────────── */
.input-container { position: relative; }

.doc-picker-panel {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    width: 380px;
    max-width: calc(100vw - 40px);
    background: var(--main-bg);
    border: 1.5px solid var(--main-border);
    border-radius: var(--radius-lg);
    box-shadow: none;
    z-index: 200;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: pickerAppear 0.15s ease;
}
@keyframes pickerAppear {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}
.doc-picker-panel.hidden { display: none; }

.doc-picker-header {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 9px 14px 8px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--main-text);
    border-bottom: 1px solid var(--main-border);
}
.doc-picker-header svg { color: var(--main-text-muted); flex-shrink: 0; }

.doc-picker-list {
    max-height: 220px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--main-border) transparent;
}

.doc-picker-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 14px;
    cursor: pointer;
    transition: background var(--transition);
}
.doc-picker-item:hover { background: var(--input-bg); }
.doc-picker-item.selected { background: color-mix(in srgb, var(--signal) 5%, transparent); }

.doc-picker-item-icon { flex-shrink: 0; color: var(--main-text-muted); }

.doc-picker-item-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.doc-picker-item-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--main-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.doc-picker-item-meta { font-size: 0.6875rem; color: var(--main-text-muted); }

.doc-picker-item-check {
    flex-shrink: 0;
    color: var(--accent);
    opacity: 0;
    transition: opacity var(--transition);
}
.doc-picker-item.selected .doc-picker-item-check { opacity: 1; }

.doc-picker-empty {
    padding: 16px 14px;
    text-align: center;
    color: var(--main-text-muted);
    font-size: 0.8125rem;
}

.doc-picker-footer {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-top: 1px solid var(--main-border);
}
.doc-picker-search-wrap {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
}
.doc-picker-search-wrap svg {
    position: absolute;
    left: 9px;
    color: var(--main-text-muted);
    pointer-events: none;
    flex-shrink: 0;
}
.doc-picker-search {
    width: 100%;
    padding: 6px 10px 6px 28px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--main-text);
    outline: none;
    transition: border-color var(--transition);
}
.doc-picker-search::placeholder { color: var(--main-text-muted); }
.doc-picker-search:focus { border-color: var(--accent); }

.btn-picker-upload {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border-radius: var(--radius-full);
    border: 1.5px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-sans);
    white-space: nowrap;
    transition: border-color var(--transition), color var(--transition);
}
.btn-picker-upload:hover { border-color: var(--accent); color: var(--accent); }
.btn-picker-upload svg { flex-shrink: 0; }

/* ══════════════════════════════════════════════════════════════════════════════
   Sidebar primary navigation
   ══════════════════════════════════════════════════════════════════════════════ */
.sidebar-primary-nav {
    padding: 4px 8px 6px;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    color: var(--sidebar-text);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: var(--font-display);
    background: none;
    border: none;
    cursor: pointer;
    text-decoration: none;
    width: 100%;
    transition: background var(--transition), color var(--transition);
}
.sidebar-nav-item svg { width: 16px; height: 16px; color: var(--sidebar-icon); flex-shrink: 0; }
.sidebar-nav-item:hover { background: var(--sidebar-hover); color: var(--sidebar-text); }
.sidebar-nav-item.active { background: var(--sidebar-active); font-weight: 600; }
.sidebar-nav-item.active svg { color: var(--sidebar-text); }

/* Chats section collapsible header */
.sidebar-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px 4px;
    cursor: pointer;
    flex-shrink: 0;
    user-select: none;
}
.sidebar-section-header span {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--sidebar-text-muted);
}
.sidebar-section-header svg {
    width: 14px;
    height: 14px;
    color: var(--sidebar-text-muted);
    transition: transform var(--transition);
}
.sidebar-section-header.collapsed svg { transform: rotate(-90deg); }

/* ══════════════════════════════════════════════════════════════════════════════
   Documents page
   ══════════════════════════════════════════════════════════════════════════════ */
.docs-page {
    flex: 1;
    overflow-y: auto;
    padding: 32px 40px 40px;
    background: var(--main-bg);
    scrollbar-width: thin;
    scrollbar-color: var(--main-border) transparent;
}
@media (max-width: 768px) { .docs-page { padding: 20px 16px; } }

.docs-page-header { margin-bottom: 20px; }
.docs-page-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--main-text);
    letter-spacing: -0.02em;
}

/* ── Toolbar ──────────────────────────────────────────────────────────────── */
.docs-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}
.docs-toolbar-left  { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.docs-toolbar-right { display: flex; align-items: center; gap: 8px; }

.btn-docs-toolbar {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 13px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), color var(--transition);
    white-space: nowrap;
    text-decoration: none;
}
.btn-docs-toolbar:hover { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--signal) 4%, transparent); }
.btn-docs-toolbar.active { background: color-mix(in srgb, var(--signal) 8%, transparent); border-color: var(--accent); color: var(--accent); }
.btn-docs-toolbar svg { flex-shrink: 0; }

.docs-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--main-border);
    color: var(--main-text-muted);
    font-size: 0.8125rem;
    font-weight: 500;
    background: var(--main-bg);
}
.docs-breadcrumb svg { flex-shrink: 0; }

.docs-search-wrap {
    position: relative;
    display: flex;
    align-items: center;
}
.docs-search-wrap svg {
    position: absolute;
    left: 10px;
    color: var(--main-text-muted);
    pointer-events: none;
    flex-shrink: 0;
}
#docsSearch {
    padding: 7px 12px 7px 30px;
    border: 1.5px solid var(--main-border);
    border-radius: var(--radius-md);
    background: var(--main-bg);
    color: var(--main-text);
    font-size: 0.8125rem;
    outline: none;
    width: 220px;
    transition: border-color var(--transition), box-shadow var(--transition);
}
#docsSearch::placeholder { color: var(--main-text-muted); }
#docsSearch:focus { border-color: var(--accent); box-shadow: none; }

.docs-view-toggles { display: flex; gap: 4px; }
.btn-docs-view {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text-muted);
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.btn-docs-view:hover { border-color: var(--accent); color: var(--accent); }
.btn-docs-view.active { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--signal) 6%, transparent); }
.btn-docs-view svg { flex-shrink: 0; }

/* ── Document list (list view) ────────────────────────────────────────────── */
.docs-list { display: flex; flex-direction: column; gap: 0; }

.docs-row {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 14px;
    border-radius: var(--radius-md);
    transition: background var(--transition);
    cursor: default;
}
.docs-row:hover { background: var(--input-bg); }
.docs-row:hover .docs-row-actions { opacity: 1; }

.docs-row-icon {
    flex-shrink: 0;
    width: 32px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--main-text-muted);
}

.docs-row-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.docs-row-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--main-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.docs-row-desc {
    font-size: 0.78rem;
    color: var(--main-text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 480px;
}

.docs-row-meta {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    color: var(--main-text-muted);
    white-space: nowrap;
    flex-shrink: 0;
    min-width: 180px;
}
.docs-row-meta svg { flex-shrink: 0; }

.docs-row-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
    opacity: 0;
    transition: opacity var(--transition);
}
.docs-row:hover .docs-row-actions { opacity: 1; }

.btn-docs-action {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text-muted);
    font-size: 0.75rem;
    font-weight: 500;
    font-family: var(--font-sans);
    white-space: nowrap;
    transition: border-color var(--transition), color var(--transition), background var(--transition);
}
.btn-docs-action:hover { border-color: var(--accent); color: var(--accent); background: color-mix(in srgb, var(--signal) 5%, transparent); }
.btn-docs-action svg { flex-shrink: 0; }

.btn-docs-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    color: var(--main-text-muted);
    transition: background var(--transition), color var(--transition);
}
.btn-docs-more:hover { background: var(--input-bg); color: var(--main-text); }

/* Loading skeletons */
.docs-loading-skeletons { display: flex; flex-direction: column; gap: 6px; }
.docs-row-skeleton {
    height: 62px;
    border-radius: var(--radius-md);
    background: linear-gradient(90deg, var(--input-bg) 25%, var(--main-bg) 50%, var(--input-bg) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.4s infinite;
}

/* Empty state */
.docs-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    gap: 14px;
    color: var(--main-text-muted);
    text-align: center;
}
.docs-empty p { font-size: 0.9rem; }

/* ── Document grid view ───────────────────────────────────────────────────── */
.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
}

.docs-grid-card {
    display: flex;
    flex-direction: column;
    border: 1.5px solid var(--main-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--main-bg);
    transition: border-color var(--transition), box-shadow var(--transition);
}
.docs-grid-card:hover { border-color: var(--accent); box-shadow: none; }

.docs-grid-thumb {
    height: 100px;
    background: var(--surface-2);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
[data-theme="dark"] .docs-grid-thumb { background: var(--surface-2); }

.docs-grid-info {
    padding: 10px 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 3px;
    flex: 1;
}
.docs-grid-meta  { font-size: 0.6875rem; color: var(--main-text-muted); font-weight: 500; }
.docs-grid-name  { font-size: 0.8125rem; font-weight: 600; color: var(--main-text);
                   white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.docs-grid-desc  { font-size: 0.75rem; color: var(--main-text-muted); line-height: 1.4;
                   display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
                   overflow: hidden; }

.docs-grid-footer {
    display: flex;
    gap: 6px;
    padding: 8px 12px;
    border-top: 1px solid var(--main-border);
}
.btn-docs-action-sm {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--main-border);
    background: var(--main-bg);
    color: var(--main-text-muted);
    font-size: 0.6875rem;
    font-weight: 500;
    font-family: var(--font-sans);
    transition: border-color var(--transition), color var(--transition);
}
.btn-docs-action-sm:hover { border-color: var(--accent); color: var(--accent); }

/* ── Upload pill ─────────────────────────────────────────────────────────── */
.docs-upload-pill {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--input-bg);
    border: 1px solid var(--main-border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--main-text-muted);
    margin-bottom: 8px;
    max-width: 320px;
}

/* ── Context menu ────────────────────────────────────────────────────────── */
.docs-context-menu {
    position: fixed;
    z-index: 500;
    background: var(--main-bg);
    border: 1.5px solid var(--main-border);
    border-radius: var(--radius-md);
    box-shadow: none;
    min-width: 160px;
    overflow: hidden;
    animation: pickerAppear 0.12s ease;
}
.docs-ctx-item {
    display: block;
    width: 100%;
    padding: 9px 16px;
    font-size: 0.8125rem;
    color: var(--main-text);
    text-align: left;
    transition: background var(--transition);
}
.docs-ctx-item:hover { background: var(--input-bg); }
.docs-ctx-item.danger { color: var(--bad-ink); }
.docs-ctx-item.danger:hover { background: var(--bad); }
.docs-ctx-divider { height: 1px; background: var(--main-border); margin: 2px 0; }

/* ── Details modal ───────────────────────────────────────────────────────── */
.docs-modal-overlay {
    position: fixed;
    inset: 0;
    background: var(--scrim);
    z-index: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    backdrop-filter: blur(2px);
    animation: fadeIn 0.18s ease;
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.docs-modal {
    background: var(--main-bg);
    border: 1.5px solid var(--main-border);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 440px;
    box-shadow: none;
    animation: pickerAppear 0.18s ease;
    overflow: hidden;
}
.docs-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 18px 20px 14px;
    border-bottom: 1px solid var(--main-border);
}
.docs-modal-title {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--main-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 340px;
}
.docs-modal-close {
    color: var(--main-text-muted);
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
    flex-shrink: 0;
}
.docs-modal-close:hover { background: var(--input-bg); color: var(--main-text); }

.docs-modal-body { padding: 16px 20px; display: flex; flex-direction: column; gap: 10px; }
.docs-detail-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 12px;
    font-size: 0.875rem;
}
.docs-detail-row span { color: var(--main-text-muted); white-space: nowrap; }
.docs-detail-row strong { color: var(--main-text); font-weight: 600; text-align: right; }
.docs-detail-desc { flex-direction: column; gap: 4px; }
.docs-detail-desc p { color: var(--main-text-muted); font-size: 0.8125rem; line-height: 1.5; }

.docs-modal-footer {
    padding: 12px 20px 16px;
    border-top: 1px solid var(--main-border);
}
.btn-docs-modal-chat {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 16px;
    border-radius: var(--radius-md);
    background: var(--accent);
    color: var(--signal-ink);
    font-size: 0.875rem;
    font-weight: 600;
    font-family: var(--font-display);
    transition: background var(--transition);
    width: 100%;
    justify-content: center;
}
.btn-docs-modal-chat:hover { background: var(--accent-hover); }

/* ── Toast notifications ─────────────────────────────────────────────────── */
.docs-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    padding: 10px 20px;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    box-shadow: none;
    z-index: 700;
    opacity: 0;
    transition: opacity 0.25s ease, transform 0.25s ease;
    pointer-events: none;
    white-space: nowrap;
}
.docs-toast.visible { opacity: 1; transform: translateX(-50%) translateY(0); }
.docs-toast-success { background: var(--ok-ink); color: var(--paper); }
.docs-toast-error   { background: var(--bad-ink); color: var(--paper); }
.docs-toast-info    { background: var(--main-text); color: var(--main-bg); }

/* ── AG-UI tool-call cards ────────────────────────────────────────────────── */
/* Each agent tool call (qto_summary, find_work_item, compute_estimate,
   classify_group, compute_carbon) renders inside the assistant message
   bubble as a collapsible card. Open while running, auto-collapsed once a
   successful result arrives so the markdown reply stays the focus. */

.tool-calls {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 10px;
}
.tool-calls:empty { display: none; }

.tool-call-card {
    border: 1px solid var(--main-border);
    border-radius: var(--radius-md, 10px);
    background: var(--msg-code-bg);
    font-size: 13px;
    overflow: hidden;
}
.tool-call-card.is-running { border-color: var(--accent); }
.tool-call-card.is-warn    { border-color: var(--warn-ink); }
.tool-call-card.is-denied  { border-color: var(--warn-ink); background: var(--warn); }
.tool-call-card.is-error   { border-color: var(--bad-ink); background: var(--bad); }

.tool-call-card__header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    cursor: pointer;
    list-style: none;
    user-select: none;
    color: var(--main-text);
    font-weight: 500;
}
.tool-call-card__header::-webkit-details-marker { display: none; }
.tool-call-card[open] .tool-call-card__header {
    border-bottom: 1px solid var(--main-border);
}

.tool-call-card__icon {
    display: inline-flex;
    align-items: center;
    color: var(--main-text-muted);
}
.tool-call-card.is-running .tool-call-card__icon { color: var(--accent); }

.tool-call-card__title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tool-call-card__pill {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    border-radius: var(--radius-full, 9999px);
    font-size: 11px;
    font-weight: 600;
    line-height: 1.4;
    border: 1px solid transparent;
    white-space: nowrap;
}
.tool-call-card__pill.is-running { background: color-mix(in srgb, var(--signal) 10%, transparent); color: var(--accent); }
.tool-call-card__pill.is-ok      { background: var(--ok);  color: var(--ok-ink); }
.tool-call-card__pill.is-warn    { background: var(--warn); color: var(--warn-ink); }
.tool-call-card__pill.is-denied  { background: var(--warn); color: var(--warn-ink); border-color: var(--warn-ink); }
.tool-call-card__pill.is-error   { background: var(--bad);  color: var(--bad-ink); }
.tool-call-card__pill.is-info    { background: color-mix(in srgb, var(--signal) 10%, transparent); color: var(--accent); }

.tool-call-card__body {
    padding: 10px 12px 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.tool-call-card__section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--main-text-muted);
}

.tool-call-card__args {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.tool-call-card__arg-list {
    display: grid;
    grid-template-columns: max-content 1fr;
    gap: 2px 12px;
    margin: 0;
}
.tool-call-card__arg-list dt {
    color: var(--main-text-muted);
    font-family: var(--font-sans, sans-serif);
    font-weight: 500;
}
.tool-call-card__arg-list dd {
    margin: 0;
    word-break: break-word;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    font-size: 12px;
}

.tool-call-card__totals {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}
.tool-call-card__metric {
    display: flex;
    flex-direction: column;
    min-width: 120px;
}
.tool-call-card__metric-label {
    font-size: 11px;
    color: var(--main-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.tool-call-card__metric-value {
    font-weight: 600;
    color: var(--main-text);
}

.tool-call-card__table-wrap {
    overflow-x: auto;
    border: 1px solid var(--main-border);
    border-radius: var(--radius-sm, 6px);
}
.tool-call-card__table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
}
.tool-call-card__table th,
.tool-call-card__table td {
    padding: 6px 10px;
    text-align: left;
    border-bottom: 1px solid var(--main-border);
    vertical-align: top;
}
.tool-call-card__table th {
    background: color-mix(in srgb, var(--ink) 3%, transparent);
    font-weight: 600;
    color: var(--main-text-muted);
    text-transform: uppercase;
    font-size: 10.5px;
    letter-spacing: 0.04em;
}
.tool-call-card__table tr:last-child td { border-bottom: 0; }

.tool-call-card__grand-total {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-top: 8px;
    border-top: 1px solid var(--main-border);
}
.tool-call-card__grand-total-label {
    color: var(--main-text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}
.tool-call-card__grand-total-value {
    font-weight: 700;
    font-size: 15px;
    color: var(--main-text);
}

.tool-call-card__group {
    border: 1px solid var(--main-border);
    border-radius: var(--radius-sm, 6px);
    padding: 10px;
    background: var(--main-bg);
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.tool-call-card__group-head {
    display: flex;
    align-items: baseline;
    gap: 8px;
}
.tool-call-card__group-title {
    font-weight: 600;
    color: var(--main-text);
}
.tool-call-card__group-sub {
    color: var(--main-text-muted);
    font-size: 12px;
}
.tool-call-card__group-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 12px;
    color: var(--main-text-muted);
}
.tool-call-card__group-desc {
    font-size: 12px;
    font-style: italic;
    color: var(--main-text-muted);
}

.tool-call-card__missing-list {
    margin-top: 4px;
    font-size: 11px;
    color: var(--warn-ink);
}

.tool-call-card__banner {
    padding: 8px 10px;
    border-radius: var(--radius-sm, 6px);
    border: 1px solid var(--warn-ink);
    background: var(--warn);
    color: var(--warn-ink);
    font-size: 12.5px;
}
.tool-call-card__banner.is-denied {
    border-color: var(--warn-ink);
    background: var(--warn);
}
.tool-call-card__banner.is-error {
    border-color: var(--bad-ink);
    background: var(--bad);
    color: var(--bad-ink);
}

.tool-call-card__denial-title { font-weight: 600; margin-bottom: 2px; }
.tool-call-card__denial-meta  { font-size: 11px; opacity: 0.85; margin-bottom: 4px; }
.tool-call-card__denial-msg   { font-size: 12px; }

.tool-call-card__hint {
    font-size: 12px;
    color: var(--main-text-muted);
    font-style: italic;
}

.tool-call-card__no-result {
    color: var(--main-text-muted);
    font-style: italic;
    font-size: 12px;
}

.tool-call-card__raw {
    margin: 0;
    padding: 8px 10px;
    background: var(--main-bg);
    border: 1px solid var(--main-border);
    border-radius: var(--radius-sm, 6px);
    font-size: 11.5px;
    overflow-x: auto;
}
.tool-call-card__raw code {
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    color: var(--main-text);
    background: transparent;
    padding: 0;
    white-space: pre;
}

.tool-call-card__spinner {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--main-text-muted);
    font-size: 12px;
}

/* Dark theme adjustments */
[data-theme="dark"] .tool-call-card {
    background: color-mix(in srgb, var(--ink) 4%, transparent);
}
[data-theme="dark"] .tool-call-card__group { background: color-mix(in srgb, var(--ink) 2%, transparent); }
[data-theme="dark"] .tool-call-card__raw   { background: color-mix(in srgb, var(--ink) 2%, transparent); }
[data-theme="dark"] .tool-call-card__table th { background: color-mix(in srgb, var(--ink) 4%, transparent); }
[data-theme="dark"] .tool-call-card.is-denied { background: var(--warn); }
[data-theme="dark"] .tool-call-card__banner { background: var(--warn); color: var(--warn-ink); border-color: var(--warn-ink); }
[data-theme="dark"] .tool-call-card.is-error  { background: var(--bad); }