/* ═══════════════════════════════════════════════════════════════════════
   NeuralRAG  v2 — Professional Minimal UI
   DM Sans + Space Grotesk + JetBrains Mono
═══════════════════════════════════════════════════════════════════════ */

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

/* ── Design tokens ─────────────────────────────────────────────────── */
:root {
    /* Backgrounds */
    --bg:          #0C0E14;
    --surface:     #12151E;
    --surface2:    #181C28;
    --surface3:    #1E2333;
    --hover:       #232840;

    /* Borders */
    --border:      rgba(255,255,255,0.07);
    --border2:     rgba(255,255,255,0.12);

    /* Text */
    --text:        #E4E8F2;
    --text2:       #8891AA;
    --text3:       #4A5068;

    /* Accent */
    --blue:        #60A5FA;
    --violet:      #A78BFA;
    --grad:        linear-gradient(135deg, #60A5FA, #A78BFA);
    --grad-text:   linear-gradient(135deg, #60A5FA 0%, #C084FC 100%);

    /* Status */
    --green:       #34D399;
    --red:         #F87171;
    --amber:       #FBBF24;

    /* Layout */
    --sidebar-w:   260px;
    --topbar-h:    52px;

    /* Radii */
    --r-sm:  5px;
    --r-md:  9px;
    --r-lg:  14px;
    --r-xl:  20px;

    /* Motion */
    --ease: cubic-bezier(.16,1,.3,1);
    --dur:  0.22s;
}

[data-theme="light"] {
    --bg:       #F4F6FB;
    --surface:  #FFFFFF;
    --surface2: #F0F2F8;
    --surface3: #E8EBF5;
    --hover:    #E4E7F2;
    --border:   rgba(0,0,0,0.07);
    --border2:  rgba(0,0,0,0.12);
    --text:     #0F1224;
    --text2:    #5A607A;
    --text3:    #A0A8C0;
}

html, body { height: 100%; }
body {
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 14px;
    background: var(--bg);
    color: var(--text);
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

/* ══════════════════════════════ LAYOUT ════════════════════════════════ */
.app-shell {
    display: flex;
    height: 100vh;
}

/* ══════════════════════════════ SIDEBAR ═══════════════════════════════ */
.sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    height: 100vh;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: transform var(--dur) var(--ease), width var(--dur) var(--ease), min-width var(--dur) var(--ease);
    z-index: 20;
    overflow: hidden;
}
.sidebar.collapsed {
    transform: translateX(calc(-1 * var(--sidebar-w)));
    width: 0;
    min-width: 0;
}

/* Brand */
.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 16px 14px 12px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.brand-logo {
    width: 32px; height: 32px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    display: grid; place-items: center;
    flex-shrink: 0;
}
.brand-name {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 15px;
    background: var(--grad-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.ml-auto { margin-left: auto; }

/* New chat */
.new-chat-btn {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 12px 10px 8px;
    padding: 9px 14px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--r-lg);
    color: var(--text);
    font-family: 'DM Sans', sans-serif;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--dur);
    flex-shrink: 0;
}
.new-chat-btn:hover {
    background: var(--surface3);
    border-color: rgba(96,165,250,0.3);
    color: var(--blue);
}
.new-chat-btn svg { color: var(--blue); }

/* Section label */
.section-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .07em;
    color: var(--text3);
    padding: 0 14px;
    margin-bottom: 4px;
}
.refresh-sessions-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--text3);
    cursor: pointer;
    display: grid; place-items: center;
    border-radius: 4px;
    padding: 2px;
    transition: color var(--dur);
}
.refresh-sessions-btn:hover { color: var(--blue); }
.refresh-sessions-btn.spinning svg { animation: spin 1s linear; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Sidebar sections */
.sidebar-section {
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.history-section {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    border-bottom: none;
}

/* Session list */
.session-list {
    flex: 1;
    overflow-y: auto;
    padding: 2px 6px 6px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.sessions-loading {
    display: flex;
    justify-content: center;
    padding: 16px;
}
.loading-dots {
    display: flex; gap: 5px; align-items: center;
}
.loading-dots span {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--text3);
    animation: ld-bounce 1.2s ease-in-out infinite;
}
.loading-dots span:nth-child(2) { animation-delay: .2s; }
.loading-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes ld-bounce {
    0%,80%,100% { transform: translateY(0); opacity: .3; }
    40%          { transform: translateY(-5px); opacity: 1; }
}

.session-date-group { font-size: 10px; color: var(--text3); padding: 8px 8px 3px; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; }

.session-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 9px;
    border-radius: var(--r-md);
    cursor: pointer;
    transition: background var(--dur);
    position: relative;
    group: true;
}
.session-item:hover { background: var(--surface2); }
.session-item.active {
    background: rgba(96,165,250,0.1);
    border: 1px solid rgba(96,165,250,0.2);
}
.session-item.active .session-title { color: var(--blue); }

.session-icon {
    width: 28px; height: 28px; flex-shrink: 0;
    background: var(--surface3);
    border-radius: var(--r-sm);
    display: grid; place-items: center;
    color: var(--text2);
    font-size: 12px;
}
.session-item.active .session-icon {
    background: rgba(96,165,250,0.15);
    color: var(--blue);
}

.session-meta {
    flex: 1;
    overflow: hidden;
    min-width: 0;
}
.session-title {
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.35;
}
.session-preview {
    font-size: 11px;
    color: var(--text3);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 1px;
}

.session-actions {
    opacity: 0;
    display: flex; gap: 3px;
    transition: opacity var(--dur);
    flex-shrink: 0;
}
.session-item:hover .session-actions { opacity: 1; }
.session-action-btn {
    width: 22px; height: 22px;
    background: var(--surface3);
    border: none; border-radius: 5px;
    color: var(--text2);
    cursor: pointer;
    display: grid; place-items: center;
    transition: all .14s;
}
.session-action-btn:hover { color: var(--text); background: var(--hover); }
.session-action-btn.danger:hover { color: var(--red); }

.sessions-empty {
    font-size: 12px;
    color: var(--text3);
    text-align: center;
    padding: 20px 12px;
    line-height: 1.5;
}

/* ── Settings rows ── */
.tools-section { padding: 10px 0 8px; }
.setting-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    min-height: 32px;
}
.setting-icon {
    width: 20px; height: 20px;
    display: grid; place-items: center;
    color: var(--text3); flex-shrink: 0;
}
.setting-label { font-size: 12px; color: var(--text2); flex-shrink: 0; }
.setting-value {
    margin-left: auto;
    font-size: 11px;
    color: var(--blue);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.setting-row:hover .setting-value { color: var(--violet); }

.mode-pills-mini {
    margin-left: auto;
    display: flex; gap: 2px;
    background: var(--surface2);
    border-radius: var(--r-sm);
    padding: 2px;
}
.mode-pill-mini {
    padding: 3px 7px;
    border: none;
    border-radius: 4px;
    font-size: 10.5px;
    font-weight: 500;
    color: var(--text3);
    background: transparent;
    cursor: pointer;
    transition: all var(--dur);
}
.mode-pill-mini.active { background: var(--surface3); color: var(--text); }
.mode-pill-mini:not(.active):hover { color: var(--text2); }

/* Namespace dropdown */
.ns-dropdown {
    margin: 0 10px 4px;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--r-md);
    overflow: hidden;
    animation: fade-down .15s var(--ease);
}
@keyframes fade-down { from { opacity: 0; transform: translateY(-4px); } }
.ns-dropdown-list { max-height: 140px; overflow-y: auto; padding: 3px; }
.ns-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 6px 9px;
    border-radius: var(--r-sm);
    font-size: 11.5px;
    cursor: pointer;
    gap: 8px;
    transition: background var(--dur);
}
.ns-item:hover { background: var(--surface3); }
.ns-item.active { color: var(--blue); background: rgba(96,165,250,0.08); }
.ns-item-name { font-family: 'JetBrains Mono', monospace; flex: 1; overflow: hidden; text-overflow: ellipsis; font-size: 11px; }
.ns-item-count { font-size: 10px; color: var(--text3); white-space: nowrap; }
.ns-loading { padding: 10px; font-size: 11px; color: var(--text3); text-align: center; }

/* Sidebar footer */
.sidebar-footer {
    display: flex;
    gap: 5px;
    padding: 10px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}
.footer-btn {
    flex: 1;
    display: flex; align-items: center; justify-content: center; gap: 5px;
    padding: 7px 8px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    color: var(--text3);
    font-size: 11.5px;
    cursor: pointer;
    transition: all var(--dur);
}
.footer-btn:hover { color: var(--text); border-color: var(--border2); background: var(--surface2); }
.footer-btn.danger:hover { color: var(--red); border-color: rgba(248,113,113,.3); }

/* ══════════════════════════════ MAIN AREA ═════════════════════════════ */
.main-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Topbar */
.topbar {
    height: var(--topbar-h);
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
    z-index: 5;
}
.topbar-center {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}
.model-pill {
    display: flex; align-items: center; gap: 6px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    padding: 4px 10px;
    font-size: 12px;
    color: var(--text2);
    font-weight: 500;
}
.model-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
    animation: pulse-dot 2.2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%,100% { box-shadow: 0 0 4px var(--green); }
    50%      { box-shadow: 0 0 12px var(--green); }
}
.model-tag {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10.5px;
    color: var(--text3);
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-sm);
    padding: 3px 8px;
}
.topbar-right { display: flex; align-items: center; gap: 7px; }
.perf-badge {
    display: flex; align-items: center; gap: 5px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px; color: var(--amber);
    background: rgba(251,191,36,.08);
    border: 1px solid rgba(251,191,36,.2);
    border-radius: var(--r-sm);
    padding: 3px 8px;
    transition: opacity .3s;
}
.topbar-btn {
    display: flex; align-items: center; gap: 6px;
    padding: 6px 12px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-md);
    color: #e4e0da;
    font-size: 12.5px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--dur);
}
.topbar-btn:hover { border-color: rgba(96,165,250,.3); color: var(--blue); }

/* ── Upload panel ── */
.upload-panel {
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    padding: 12px 16px;
    position: relative;
    animation: slide-down .22s var(--ease);
    flex-shrink: 0;
}
@keyframes slide-down { from { opacity: 0; transform: translateY(-8px); } }
.upload-panel-inner { max-width: 560px; margin: 0 auto; }
.close-panel-btn {
    position: absolute; top: 10px; right: 14px;
    background: none; border: none;
    color: var(--text3); cursor: pointer; font-size: 14px;
    width: 24px; height: 24px;
    display: grid; place-items: center;
    border-radius: 5px;
    transition: color var(--dur);
}
.close-panel-btn:hover { color: var(--red); }

.drop-zone {
    border: 1.5px dashed var(--border2);
    border-radius: var(--r-lg);
    padding: 18px;
    text-align: center;
    cursor: pointer;
    transition: all var(--dur);
    display: flex; flex-direction: column; align-items: center; gap: 5px;
    color: var(--text2);
}
.drop-zone:hover, .drop-zone.over { border-color: var(--blue); background: rgba(96,165,250,.04); }
.drop-zone p { font-size: 13px; }
.drop-zone small { font-size: 11px; color: var(--text3); }
.browse-link { color: var(--blue); cursor: pointer; text-decoration: underline; }

/* File queue */
.file-queue { display: flex; flex-direction: column; gap: 7px; }
.queue-list { display: flex; flex-direction: column; gap: 3px; max-height: 100px; overflow-y: auto; }
.queue-item {
    display: flex; align-items: center; gap: 7px;
    background: var(--surface2); border: 1px solid var(--border);
    border-radius: var(--r-sm); padding: 6px 9px; font-size: 11.5px;
}
.queue-item .file-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text2); }
.queue-item .file-size { font-size: 10.5px; color: var(--text3); white-space: nowrap; }
.remove-file { cursor: pointer; color: var(--text3); font-size: 12px; }
.remove-file:hover { color: var(--red); }

.queue-actions { display: flex; gap: 6px; }
.upload-btn {
    flex: 1; display: flex; align-items: center; justify-content: center; gap: 6px;
    padding: 8px;
    background: rgba(96,165,250,.12);
    border: 1px solid rgba(96,165,250,.25);
    border-radius: var(--r-md);
    color: var(--blue); font-size: 12.5px; font-weight: 500;
    cursor: pointer; transition: all var(--dur);
}
.upload-btn:hover { background: rgba(96,165,250,.2); }
.cancel-upload-btn {
    width: 34px; background: var(--surface2);
    border: 1px solid var(--border); border-radius: var(--r-md);
    color: var(--text3); cursor: pointer; font-size: 13px;
    transition: all var(--dur);
}
.cancel-upload-btn:hover { color: var(--red); }

/* Upload progress */
.upload-progress { display: flex; flex-direction: column; gap: 6px; }
.progress-row { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--text2); }
.progress-track { height: 3px; background: var(--surface2); border-radius: 99px; overflow: hidden; }
.progress-fill {
    height: 100%; width: 0%; border-radius: 99px;
    background: linear-gradient(90deg, var(--blue), var(--violet));
    transition: width .25s var(--ease);
}
.per-file-status { display: flex; flex-direction: column; gap: 2px; margin-top: 2px; }
.pf-item { display: flex; align-items: center; gap: 6px; font-size: 11px; color: var(--text3); padding: 2px 0; }
.pf-item .pf-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pf-item.done { color: var(--green); }
.pf-item.err  { color: var(--red); }
.pf-item.processing { color: var(--amber); }
.pf-item .pf-chunks { font-family: 'JetBrains Mono', monospace; font-size: 10px; }

/* ══════════════════════════════ CHAT AREA ═════════════════════════════ */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px 20px 12px;
    display: flex;
    flex-direction: column;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

/* ── Welcome ── */
.welcome-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 32px 20px;
    animation: fade-up .5s var(--ease) both;
    gap: 12px;
}
.welcome-icon { animation: float 2s ease-in-out infinite; }
@keyframes float { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
.welcome-screen h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 28px; font-weight: 700;
    background: var(--grad-text);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.welcome-screen p { color: var(--text2); font-size: 14.5px; line-height: 1.65; }
.suggestion-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 8px; max-width: 440px; width: 100%; margin-top: 8px;
}
.suggestion-card {
    display: flex; align-items: center; gap: 8px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--r-lg); padding: 11px 14px;
    text-align: left; font-size: 13px; color: var(--text2);
    cursor: pointer; transition: all var(--dur); font-family: inherit;
}
.suggestion-card:hover {
    border-color: rgba(96,165,250,.3);
    color: var(--text); background: var(--surface2);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,.2);
}
.sug-icon { font-size: 15px; flex-shrink: 0; }

/* ── Messages ── */
.messages { display: flex; flex-direction: column; gap: 16px; }
.msg { display: flex; align-items: flex-start; gap: 10px; animation: fade-up .28s var(--ease) both; }

/* User */
.user-msg { flex-direction: row-reverse; }
.user-msg .msg-content {
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-lg) var(--r-sm) var(--r-lg) var(--r-lg);
    padding: 10px 14px; font-size: 14px; line-height: 1.65;
    max-width: 70%; white-space: pre-wrap; color: var(--text);
}

/* AI */
.ai-msg { align-items: flex-start; }
.msg-body { display: flex; flex-direction: column; gap: 4px; max-width: 80%; }
.ai-msg .msg-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-sm) var(--r-lg) var(--r-lg) var(--r-lg);
    padding: 12px 16px; font-size: 14px; line-height: 1.7;
}

/* Avatars */
.avatar, .ai-avatar, .user-avatar {
    width: 28px; height: 28px; flex-shrink: 0;
    border-radius: 50%;
    display: grid; place-items: center;
    border: 1px solid var(--border);
}
.user-avatar { background: var(--surface2); color: var(--text2); }
.ai-avatar { background: var(--surface); border-color: rgba(96,165,250,.3); }

/* Message actions */
.msg-actions { display: flex; gap: 3px; opacity: 0; transition: opacity .15s; }
.ai-msg:hover .msg-actions { opacity: 1; }
.msg-act {
    display: flex; align-items: center; gap: 4px;
    padding: 3px 7px;
    background: var(--surface2); border: none; border-radius: var(--r-sm);
    color: var(--text3); font-size: 11px; cursor: pointer;
    transition: all .14s;
}
.msg-act:hover { color: var(--text); background: var(--surface3); }

/* ── Typing ── */
.typing-row {
    display: flex; align-items: center; gap: 10px;
    padding: 4px 0;
    animation: fade-up .25s var(--ease) both;
}
.typing-bubble {
    display: flex; align-items: center; gap: 5px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--r-sm) var(--r-lg) var(--r-lg) var(--r-lg);
    padding: 10px 14px;
}
.typing-bubble span:not(.typing-label) {
    width: 5px; height: 5px; border-radius: 50%;
    background: var(--blue); animation: bounce 1.2s ease-in-out infinite;
}
.typing-bubble span:nth-child(2) { animation-delay: .15s; }
.typing-bubble span:nth-child(3) { animation-delay: .30s; }
.typing-label { font-size: 11px; color: var(--text3); margin-left: 6px; }
@keyframes bounce {
    0%,80%,100% { transform: translateY(0); opacity: .3; }
    40%          { transform: translateY(-5px); opacity: 1; }
}

/* ══════════════════════════════ INPUT BAR ═════════════════════════════ */
.input-bar {
    padding: 10px 16px 14px;
    border-top: 1px solid var(--border);
    background: var(--surface);
    flex-shrink: 0;
}

/* Image preview strip */
.img-strip {
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 8px;
    animation: slide-up .18s var(--ease);
}
@keyframes slide-up { from { opacity: 0; transform: translateY(6px); } }
#img-thumb {
    height: 52px; border-radius: var(--r-md);
    border: 1px solid rgba(96,165,250,.3); object-fit: cover;
}
.img-strip-label { font-size: 11px; color: var(--text3); flex: 1; }
.remove-img {
    width: 22px; height: 22px; border-radius: 50%;
    background: rgba(248,113,113,.12); border: 1px solid rgba(248,113,113,.25);
    color: var(--red); font-size: 11px; cursor: pointer;
    display: grid; place-items: center; transition: background .14s;
}
.remove-img:hover { background: rgba(248,113,113,.25); }

/* Input row */
.input-row {
    display: flex; align-items: center; gap: 6px;
    background: var(--surface2);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    padding: 7px 7px 7px 10px;
    transition: border-color .18s, box-shadow .18s;
}
.input-row:focus-within {
    border-color: rgba(96,165,250,.35);
    box-shadow: 0 0 0 3px rgba(96,165,250,.06);
}
.input-icon {
    flex-shrink: 0; width: 30px; height: 30px;
    border-radius: var(--r-md); border: none;
    background: transparent; color: var(--text3);
    cursor: pointer; display: grid; place-items: center;
    transition: all .14s;
}
.input-icon:hover { color: var(--text); background: var(--surface3); }

#question {
    flex: 1; background: transparent; border: none; outline: none; resize: none;
    font-family: 'DM Sans', sans-serif; font-size: 14px; color: var(--text);
    line-height: 1.6; max-height: 140px; overflow-y: auto; scrollbar-width: none;
}
#question::placeholder { color: var(--text3); }

.send-btn {
    flex-shrink: 0; width: 34px; height: 34px;
    border-radius: var(--r-md); border: none;
    background: linear-gradient(135deg, var(--blue), var(--violet));
    color: white; cursor: pointer;
    display: grid; place-items: center;
    transition: all var(--dur);
}
.send-btn:hover:not(:disabled) { transform: scale(1.06); opacity: .9; }
.send-btn:disabled { opacity: .3; cursor: not-allowed; transform: none; }

.input-footer {
    display: flex; justify-content: space-between;
    padding: 4px 2px 0;
    font-size: 10.5px;
}
.text-muted { color: var(--text3); }
.hint-text kbd {
    background: var(--surface2); border: 1px solid var(--border);
    border-radius: 3px; padding: 1px 4px;
    font-family: 'JetBrains Mono', monospace; font-size: 9.5px;
}
.mono { font-family: 'JetBrains Mono', monospace; }

/* ══════════════════════════════ MARKDOWN ══════════════════════════════ */
.markdown-content { overflow-wrap: break-word; }
.markdown-content h1,.markdown-content h2,.markdown-content h3 {
    font-family: 'Space Grotesk', sans-serif; margin: 14px 0 6px;
}
.markdown-content h1 { font-size: 17px; }
.markdown-content h2 { font-size: 15px; }
.markdown-content h3 { font-size: 13.5px; }
.markdown-content p { margin-bottom: 9px; }
.markdown-content ul,.markdown-content ol { padding-left: 18px; margin-bottom: 9px; }
.markdown-content li { margin-bottom: 3px; }
.markdown-content strong { font-weight: 600; color: var(--text); }
.markdown-content code {
    font-family: 'JetBrains Mono', monospace; font-size: 12px;
    background: var(--surface2); border: 1px solid var(--border);
    border-radius: 4px; padding: 1px 5px; color: var(--blue);
}
.markdown-content pre {
    background: #090B12; border: 1px solid var(--border);
    border-radius: var(--r-md); padding: 13px; overflow-x: auto; margin: 9px 0;
}
.markdown-content pre code { background: transparent; border: none; padding: 0; color: inherit; }
.markdown-content blockquote {
    border-left: 3px solid var(--violet); padding-left: 12px;
    margin: 9px 0; color: var(--text2); font-style: italic;
}
.markdown-content table { border-collapse: collapse; width: 100%; margin: 9px 0; font-size: 13px; }
.markdown-content th,.markdown-content td { border: 1px solid var(--border); padding: 7px 11px; }
.markdown-content th { background: var(--surface2); font-weight: 600; }
.markdown-content a { color: var(--blue); }
.markdown-content hr { border: none; border-top: 1px solid var(--border); margin: 12px 0; }

/* ══════════════════════════════ TOAST ═════════════════════════════════ */
.toast {
    position: fixed; bottom: 20px; left: 50%;
    transform: translateX(-50%) translateY(14px);
    background: var(--surface2); border: 1px solid var(--border);
    border-radius: var(--r-lg); padding: 9px 16px;
    font-size: 12.5px; color: var(--text);
    opacity: 0; pointer-events: none;
    transition: all .25s var(--ease);
    z-index: 9999; backdrop-filter: blur(12px);
    white-space: nowrap; max-width: 90vw;
    box-shadow: 0 8px 24px rgba(0,0,0,.3);
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.success { border-color: rgba(52,211,153,.35); color: var(--green); }
.toast.error   { border-color: rgba(248,113,113,.35); color: var(--red); }
.toast.info    { border-color: rgba(96,165,250,.35); color: var(--blue); }

/* ══════════════════════════════ CONTEXT MENU ═════════════════════════ */
.ctx-menu {
    position: fixed; z-index: 9000;
    background: var(--surface2);
    border: 1px solid var(--border2);
    border-radius: var(--r-md);
    padding: 4px;
    box-shadow: 0 8px 24px rgba(0,0,0,.35);
    min-width: 140px;
    animation: ctx-in .14s var(--ease);
}
@keyframes ctx-in { from { opacity: 0; transform: scale(.96); } }
.ctx-item {
    display: flex; align-items: center; gap: 8px;
    width: 100%; padding: 7px 10px;
    border: none; background: none;
    border-radius: var(--r-sm);
    font-size: 12.5px; color: var(--text2);
    cursor: pointer; transition: all .12s;
    font-family: 'DM Sans', sans-serif;
}
.ctx-item:hover { background: var(--surface3); color: var(--text); }
.ctx-item.danger:hover { color: var(--red); }

/* ══════════════════════════════ MODAL ════════════════════════════════ */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,.55);
    display: grid; place-items: center;
    z-index: 9500;
    animation: fade-in .18s ease;
}
.modal {
    background: var(--surface);
    border: 1px solid var(--border2);
    border-radius: var(--r-xl);
    padding: 24px 22px;
    min-width: 320px;
    box-shadow: 0 20px 60px rgba(0,0,0,.5);
    animation: modal-in .2s var(--ease);
}
@keyframes modal-in { from { opacity: 0; transform: scale(.95) translateY(10px); } }
.modal-title {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600; font-size: 16px;
    margin-bottom: 14px; color: var(--text);
}
.modal-input {
    width: 100%; padding: 9px 12px;
    background: var(--surface2); border: 1px solid var(--border2);
    border-radius: var(--r-md); color: var(--text);
    font-family: 'DM Sans', sans-serif; font-size: 14px;
    outline: none; transition: border-color .18s;
}
.modal-input:focus { border-color: rgba(96,165,250,.45); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.modal-btn {
    padding: 8px 18px;
    border-radius: var(--r-md); border: none;
    font-family: 'DM Sans', sans-serif;
    font-size: 13px; font-weight: 500;
    cursor: pointer; transition: all .14s;
}
.modal-btn.secondary { background: var(--surface2); color: var(--text2); }
.modal-btn.secondary:hover { color: var(--text); background: var(--surface3); }
.modal-btn.primary { background: linear-gradient(135deg, var(--blue), var(--violet)); color: white; }
.modal-btn.primary:hover { opacity: .88; }

/* ══════════════════════════════ UTILITY ═══════════════════════════════ */
.icon-btn {
    width: 30px; height: 30px;
    border: none; border-radius: var(--r-md);
    background: transparent; color: var(--text2);
    cursor: pointer; display: grid; place-items: center;
    transition: all .14s;
}
.icon-btn:hover { color: var(--text); background: var(--surface2); }

/* theme toggle moon/sun */
.icon-moon { display: none; }
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }

/* ══════════════════════════════ ANIMATIONS ════════════════════════════ */
@keyframes fade-up  { from { opacity: 0; transform: translateY(8px);  } to { opacity: 1; transform: none; } }
@keyframes fade-in  { from { opacity: 0; } to { opacity: 1; } }
@keyframes slide-up-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

/* ══════════════════════════════ SCROLLBAR ═════════════════════════════ */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 99px; }

/* ══════════════════════════════ RESPONSIVE ════════════════════════════ */
@media (max-width: 768px) {
    .sidebar { position: fixed; left: 0; top: 0; height: 100vh; z-index: 30; }
    .sidebar.collapsed { transform: translateX(-100%); }
    .suggestion-grid { grid-template-columns: 1fr; }
    .user-msg .msg-content,.msg-body { max-width: 90%; }
}