/* ═══════════════════════════════════════════════════════
   QueryX — Clean White UI  (Shibutz-inspired)
   Unified white · Bubble cards · Pill buttons · Soft depth
═══════════════════════════════════════════════════════ */

/* ── Tokens ─────────────────────────────────────────── */
:root {
    --bg:           #F7F8FA;
    --white:        #FFFFFF;
    --surface:      #FFFFFF;
    --surface-hover:#F9FAFB;
    --border:       #E8ECF1;
    --border-light: #F0F2F5;
    --border-focus: #3B82F6;

    /* Text */
    --text:         #111827;
    --text-2:       #6B7280;
    --text-3:       #9CA3AF;
    --text-4:       #D1D5DB;

    /* Accent — Shibutz-style blue */
    --accent:       #3B82F6;
    --accent-hover: #2563EB;
    --accent-light: #EFF6FF;
    --accent-glow:  rgba(59,130,246, .15);
    --accent-soft:  rgba(59,130,246, .08);

    /* Feedback */
    --green:        #10B981;
    --green-bg:     #ECFDF5;
    --red:          #EF4444;
    --red-bg:       #FEF2F2;

    /* Radii — generous, Shibutz-like */
    --r-sm:   8px;
    --r-md:   12px;
    --r-lg:   16px;
    --r-xl:   20px;
    --r-2xl:  24px;
    --r-pill: 999px;

    /* Shadows */
    --shadow-xs:  0 1px 2px rgba(0,0,0,.04);
    --shadow-sm:  0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
    --shadow-md:  0 4px 12px rgba(0,0,0,.06), 0 1px 3px rgba(0,0,0,.04);
    --shadow-lg:  0 8px 28px rgba(0,0,0,.08), 0 2px 6px rgba(0,0,0,.04);
    --shadow-focus: 0 0 0 3px var(--accent-glow);

    /* Motion */
    --ease:    cubic-bezier(.25,.1,.25,1);
    --spring:  cubic-bezier(.34,1.56,.64,1);
    --dur:     180ms;
    --dur-md:  280ms;
    --dur-lg:  400ms;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

/* ── Reset ──────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; }
body {
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.55;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
button { font-family: var(--font); cursor: pointer; border: none; background: none; }
input  { font-family: var(--font); }

/* ── App Container ──────────────────────────────────── */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    background: var(--bg);
}

/* ════════════════════════════════════════════════════
   NAV BAR — Clean top bar like Shibutz
════════════════════════════════════════════════════ */
.navbar {
    height: 60px;
    background: var(--white);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    flex-shrink: 0;
    z-index: 10;
}

.nav-left { display: flex; align-items: center; gap: 12px; }

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 34px;
    height: 34px;
    border-radius: var(--r-sm);
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -.4px;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--r-pill);
    font-size: 13.5px;
    font-weight: 600;
    color: var(--white);
    background: var(--accent);
    transition: background var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease),
                transform var(--dur) var(--ease);
}
.nav-btn:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}
.nav-btn:active { transform: translateY(0) scale(.97); }

.nav-avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--r-pill);
    background: linear-gradient(135deg, #3B82F6, #8B5CF6);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.nav-avatar:hover {
    transform: scale(1.08);
    box-shadow: 0 2px 10px rgba(59,130,246,.25);
}

/* ════════════════════════════════════════════════════
   LAYOUT — Two columns, unified background
════════════════════════════════════════════════════ */
.layout {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--bg);
}

/* ── LEFT PANEL: Documents ──────────────────────────── */
.panel-left {
    width: 300px;
    min-width: 300px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background: var(--white);
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--border-light);
}

.panel-title {
    font-size: 15px;
    font-weight: 650;
    color: var(--text);
    letter-spacing: -.2px;
}

.btn-upload-trigger {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border-radius: var(--r-pill);
    font-size: 12.5px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-light);
    border: 1px solid rgba(59,130,246,.15);
    transition: background var(--dur) var(--ease),
                color var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease);
}
.btn-upload-trigger:hover {
    background: var(--accent);
    color: #fff;
    box-shadow: var(--shadow-sm);
}

/* File list */
.file-list {
    overflow-y: auto;
    padding: 12px 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.file-list:not(:empty) {
    flex: 1;
}
.file-list:empty {
    display: none;
}
.file-list::-webkit-scrollbar { width: 4px; }
.file-list::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

/* ── File Bubble Cards ─────────────────────────────── */
.file-bubble {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--white);
    border: 1.5px solid var(--border);
    border-radius: var(--r-lg);
    cursor: pointer;
    transition: border-color var(--dur) var(--ease),
                background var(--dur) var(--ease),
                box-shadow var(--dur-md) var(--ease),
                transform var(--dur) var(--ease),
                opacity var(--dur-md) var(--ease);
    position: relative;
    animation: fileBubbleIn var(--dur-lg) var(--spring) both;
}

/* Staggered entrance — set via inline style: --i */
.file-bubble { animation-delay: calc(var(--i, 0) * 50ms); }

/* ── Uploading / Processing state ─────────────────── */
.file-bubble.uploading {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-sm);
    cursor: default;
}
.file-bubble.uploading::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(59,130,246,.08) 35%,
        rgba(59,130,246,.20) 50%,
        rgba(59,130,246,.08) 65%,
        transparent 100%
    );
    background-size: 200% 100%;
    animation: shimmer 1.6s ease-in-out infinite;
    pointer-events: none;
}
.file-bubble.uploading .file-bubble-meta {
    color: var(--accent);
    font-weight: 550;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.file-bubble.uploading .file-bubble-icon {
    background: rgba(59,130,246,.18);
    color: var(--accent);
    animation: iconPulse 2s ease-in-out infinite;
}

.file-bubble:hover:not(.uploading) {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.file-bubble.active {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: 0 0 0 3px var(--accent-soft), var(--shadow-sm);
}

.file-bubble-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--r-md);
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--dur-md) var(--ease);
}
.file-bubble.active .file-bubble-icon,
.file-bubble:hover:not(.uploading) .file-bubble-icon {
    background: rgba(59,130,246,.15);
}

.file-bubble-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.file-bubble-name {
    font-size: 13.5px;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -.1px;
}

.file-bubble-meta {
    font-size: 12px;
    color: var(--text-3);
    font-weight: 450;
    transition: color var(--dur) var(--ease);
}

.file-bubble-delete {
    width: 28px;
    height: 28px;
    border-radius: var(--r-sm);
    color: var(--text-4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--dur) var(--ease),
                background var(--dur) var(--ease),
                color var(--dur) var(--ease);
}
.file-bubble:hover .file-bubble-delete { opacity: 1; }
.file-bubble-delete:hover {
    background: var(--red-bg);
    color: var(--red);
}

/* Empty state for left panel */
.panel-empty {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 40px 20px;
}

.panel-empty-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--r-xl);
    background: var(--bg);
    color: var(--text-3);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
}

.panel-empty-text {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-2);
}

.panel-empty-sub {
    font-size: 12.5px;
    color: var(--text-3);
}

/* ════════════════════════════════════════════════════
   RIGHT PANEL — Content area
════════════════════════════════════════════════════ */
.panel-right {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    background: var(--bg);
    overflow: hidden;
}

/* ── Views ──────────────────────────────────────────── */
.view {
    display: none;
    flex: 1;
    overflow: hidden;
    flex-direction: column;
    opacity: 0;
    transform: translateY(6px);
    transition: opacity var(--dur-md) var(--ease),
                transform var(--dur-md) var(--ease);
}
.view.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
    animation: viewFadeIn var(--dur-md) var(--ease) both;
}

/* ════════════════════════════════════════════════════
   UPLOAD VIEW
════════════════════════════════════════════════════ */
.view-upload {
    align-items: center;
    justify-content: center;
    overflow-y: auto;
    padding: 24px;
}

.upload-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
    width: 100%;
    max-width: 520px;
    margin: auto;
    animation: fadeUp var(--dur-lg) var(--ease) both;
}

.upload-card-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.upload-hero-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--r-xl);
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 4px;
}

.upload-title {
    font-size: 28px;
    font-weight: 750;
    color: var(--text);
    letter-spacing: -.6px;
    line-height: 1.2;
}

.upload-subtitle {
    font-size: 15px;
    color: var(--text-2);
    font-weight: 400;
    max-width: 360px;
    line-height: 1.5;
}

/* ── Drop Zone ─────────────────────────────────────── */
.drop-zone {
    width: 100%;
    background: var(--white);
    border: 2px dashed var(--border);
    border-radius: var(--r-2xl);
    padding: 44px 28px;
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: border-color var(--dur) var(--ease),
                background var(--dur) var(--ease),
                box-shadow var(--dur-md) var(--ease),
                transform var(--dur) var(--ease);
    box-shadow: var(--shadow-xs);
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-light);
    box-shadow: var(--shadow-focus), var(--shadow-md);
    transform: translateY(-2px);
}

.drop-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.drop-icon-circle {
    width: 52px;
    height: 52px;
    border-radius: var(--r-pill);
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 6px;
    transition: transform var(--dur-md) var(--spring), background var(--dur) var(--ease);
}
.drop-zone:hover .drop-icon-circle {
    transform: translateY(-3px);
    background: rgba(59,130,246,.15);
}

.drop-text {
    font-size: 14px;
    font-weight: 450;
    color: var(--text-2);
    text-align: center;
}

.browse-link {
    font-weight: 600;
    color: var(--accent);
    cursor: pointer;
    text-decoration: none;
    border-bottom: 1.5px solid transparent;
    transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.browse-link:hover {
    color: var(--accent-hover);
    border-bottom-color: var(--accent-hover);
}

.drop-subtext {
    font-size: 12.5px;
    color: var(--text-3);
}

/* Progress bar */
.drop-progress {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: var(--border-light);
    display: none;
    border-radius: 0 0 var(--r-2xl) var(--r-2xl);
    overflow: hidden;
}
.drop-progress.visible { display: block; }
.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #8B5CF6);
    width: 0%;
    border-radius: 2px;
    transition: width .3s ease;
}

/* Primary button */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent);
    color: #fff;
    border-radius: var(--r-pill);
    padding: 13px 32px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: -.1px;
    min-width: 230px;
    justify-content: center;
    transition: background var(--dur) var(--ease),
                box-shadow var(--dur-md) var(--ease),
                transform var(--dur) var(--ease);
    box-shadow: var(--shadow-sm);
}
.btn-primary:not(:disabled):hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 24px var(--accent-glow);
    transform: translateY(-1px);
}
.btn-primary:not(:disabled):active {
    transform: translateY(0) scale(.97);
}
.btn-primary:disabled {
    background: var(--text-4);
    cursor: not-allowed;
    box-shadow: none;
}

/* Feature pills — like Shibutz checkmarks */
.upload-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.feature-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--r-pill);
    font-size: 13px;
    font-weight: 500;
    color: var(--text-2);
    transition: border-color var(--dur) var(--ease),
                background var(--dur) var(--ease),
                box-shadow var(--dur-md) var(--ease),
                transform var(--dur) var(--ease);
}
.feature-pill:hover {
    border-color: var(--accent);
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-xs);
}
.feature-pill svg { color: var(--accent); flex-shrink: 0; }

/* ════════════════════════════════════════════════════
   CHAT VIEW
════════════════════════════════════════════════════ */
.view-chat {
    background: var(--bg);
}

.chat-container {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.messages {
    flex: 1;
    overflow-y: auto;
    padding: 32px 40px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}
.messages::-webkit-scrollbar { width: 5px; }
.messages::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* Message rows */
.message {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin: 0;
    padding: 0;
    animation: msgIn .3s var(--ease) both;
}
.message.user { flex-direction: row-reverse; }
.message.processing-message {
    justify-content: flex-start;
    width: 100%;
    margin: 0;
}
.message.processing-message .msg-avatar {
    display: none;
}

.msg-avatar {
    width: 34px;
    height: 34px;
    border-radius: var(--r-pill);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
    margin-top: 2px;
}
.msg-avatar.ai {
    background: var(--accent-light);
    color: var(--accent);
    border: 1px solid rgba(59,130,246,.12);
}
.msg-avatar.usr {
    background: linear-gradient(135deg, #3B82F6, #8B5CF6);
    color: #fff;
}

.bubble {
    max-width: 65%;
    padding: 14px 18px;
    border-radius: var(--r-xl);
    font-size: 14.5px;
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-word;
}
.message.user .bubble {
    background: var(--accent);
    color: #fff;
    border-bottom-right-radius: var(--r-sm);
    box-shadow: 0 2px 12px rgba(59,130,246,.18);
}
.message.ai .bubble {
    background: var(--white);
    color: var(--text);
    border: 1px solid var(--border);
    border-bottom-left-radius: var(--r-sm);
    box-shadow: var(--shadow-sm);
}

.processing-bubble {
    background: var(--white) !important;
    color: var(--text) !important;
    border: 1px solid var(--border) !important;
    border-bottom-left-radius: var(--r-sm) !important;
    box-shadow: var(--shadow-sm) !important;
    max-width: 68%;
    width: auto;
    min-width: 0;
    padding: 12px 16px;
    border-radius: var(--r-xl);
    font-size: 14.5px;
    line-height: 1.55;
    white-space: pre-wrap;
    word-break: break-word;
    margin: 0;
}

.source-chips { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border-light); }
.source-chips-label { font-size: 11.5px; font-weight: 600; color: var(--text-2); margin-bottom: 6px; }
.chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--accent-light);
    border: 1px solid rgba(59,130,246,.12);
    border-radius: var(--r-pill);
    padding: 3px 12px;
    font-size: 11.5px;
    color: var(--accent);
    font-weight: 500;
    margin: 2px 4px 2px 0;
    transition: background var(--dur) var(--ease);
}
.chip:hover { background: rgba(59,130,246,.14); }
.processing-header {
    display: flex;
    align-items: center;
    gap: 7px;
    margin-bottom: 6px;
    font-size: 14px;
    font-weight: 700;
}
.processing-header strong {
    letter-spacing: .01em;
}
.processing-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid rgba(99,102,241,.18);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: processSpin .8s linear infinite;
    box-shadow: 0 0 0 4px rgba(59,130,246,.06);
}
.processing-sub {
    font-size: 12.5px;
    color: var(--text-2);
    margin: 0 0 8px;
    line-height: 1.4;
}
.processing-bar-wrap {
    height: 5px;
    background: rgba(148,163,184,.18);
    border-radius: 999px;
    overflow: hidden;
    border: 1px solid rgba(148,163,184,.12);
}
.processing-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--accent), #8B5CF6 55%, #EC4899);
    width: 0%;
    border-radius: inherit;
    transition: width .25s ease;
    box-shadow: 0 0 18px rgba(99,102,241,.28);
}
.stop-processing-btn {
    margin-top: 8px;
    padding: 6px 10px;
    border: 1px solid rgba(239,68,68,.28);
    border-radius: var(--r-pill);
    background: linear-gradient(180deg, rgba(254,242,242,.9), rgba(254,226,226,.98));
    color: #b91c1c;
    font-size: 11.5px;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--dur) var(--ease);
    box-shadow: 0 8px 18px rgba(239,68,68,.08);
}
.stop-processing-btn:hover {
    background: rgba(254,226,226,1);
    border-color: rgba(239,68,68,.42);
    transform: translateY(-1px);
}
.stop-processing-btn:active {
    transform: translateY(0) scale(.98);
}
.stop-processing-btn:disabled,
.stop-processing-btn.is-cancelling {
    opacity: .9;
    cursor: wait;
    background: linear-gradient(180deg, rgba(254,242,242,.85), rgba(248,250,252,.95));
    border-color: rgba(148,163,184,.35);
    color: var(--text-2);
    box-shadow: none;
}

/* Typing dots */
.typing-bubble .bubble { padding: 16px 20px; }
.dot-row { display: flex; gap: 5px; align-items: center; }
.dot-row span {
    width: 7px; height: 7px;
    background: var(--text-3);
    border-radius: var(--r-pill);
    animation: dotBounce 1.2s ease-in-out infinite;
}
.dot-row span:nth-child(2) { animation-delay: .18s; }
.dot-row span:nth-child(3) { animation-delay: .36s; }

/* ── Welcome / Ready Card in Chat ─────────────────── */
.welcome-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--r-2xl);
    padding: 32px 24px;
    margin: auto;
    max-width: 480px;
    box-shadow: var(--shadow-sm);
    animation: fadeUp var(--dur-lg) var(--ease) both;
}

.welcome-icon-wrap {
    width: 56px;
    height: 56px;
    border-radius: var(--r-xl);
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
}

.welcome-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    letter-spacing: -.3px;
}

.welcome-sub {
    font-size: 13px;
    color: var(--text-2);
    margin-bottom: 20px;
    line-height: 1.5;
    max-width: 380px;
}

.starter-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.starter-chip {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--r-pill);
    padding: 8px 16px;
    font-size: 12.5px;
    font-weight: 500;
    color: var(--text);
    cursor: pointer;
    transition: background var(--dur) var(--ease),
                border-color var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                box-shadow var(--dur) var(--ease);
}
.starter-chip:hover {
    background: var(--accent-light);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
    box-shadow: var(--shadow-xs);
}
.starter-chip:active { transform: translateY(0); }

/* ── Chat Input Bar ──────────────────────────────────── */
.chat-input-bar {
    padding: 16px 28px 22px;
    background: var(--white);
    border-top: 1px solid var(--border-light);
    flex-shrink: 0;
}

.input-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg);
    border: 1.5px solid var(--border);
    border-radius: var(--r-pill);
    padding: 6px 8px 6px 18px;
    transition: border-color var(--dur) var(--ease),
                box-shadow var(--dur-md) var(--ease),
                background var(--dur) var(--ease);
}
.input-wrap:focus-within {
    border-color: var(--accent);
    box-shadow: var(--shadow-focus);
    background: var(--white);
}

#question {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    font-size: 14.5px;
    color: var(--text);
    min-height: 36px;
    font-weight: 450;
}
#question::placeholder { color: var(--text-3); font-weight: 400; }

.input-action-btn {
    color: var(--text-3);
    padding: 7px;
    border-radius: var(--r-sm);
    transition: background var(--dur) var(--ease),
                color var(--dur) var(--ease),
                transform var(--dur) var(--ease);
}
.input-action-btn:hover { background: var(--border-light); color: var(--text-2); }
.input-action-btn:active { transform: scale(.9); }

.btn-send {
    width: 38px; height: 38px;
    border-radius: var(--r-pill);
    background: var(--accent);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background var(--dur) var(--ease),
                transform var(--dur) var(--ease),
                box-shadow var(--dur-md) var(--ease);
}
.btn-send:hover:not(:disabled) {
    background: var(--accent-hover);
    transform: scale(1.06);
    box-shadow: 0 3px 12px var(--accent-glow);
}
.btn-send:active:not(:disabled) { transform: scale(.93); }
.btn-send:disabled {
    background: var(--text-4);
    cursor: not-allowed;
}

.input-disclaimer {
    margin-top: 10px;
    font-size: 11.5px;
    color: var(--text-3);
    text-align: center;
    font-weight: 400;
}

/* ── Toast ──────────────────────────────────────────── */
.toast {
    position: fixed;
    bottom: 28px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: var(--text);
    color: #fff;
    padding: 11px 24px;
    border-radius: var(--r-pill);
    font-size: 13.5px;
    font-weight: 500;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    box-shadow: var(--shadow-lg);
    transition: transform .35s var(--spring), opacity .3s var(--ease);
    max-width: 380px;
    text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast-success { background: #059669; }
.toast-error   { background: #DC2626; }
.toast-info    { background: #2563EB; }

/* ── Animations ─────────────────────────────────────── */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes msgIn {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes dotBounce {
    0%,60%,100% { transform: translateY(0); }
    30%          { transform: translateY(-6px); }
}
@keyframes fileBubbleIn {
    from {
        opacity: 0;
        transform: translateX(-12px) scale(.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}
@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}
@keyframes viewFadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes fileBubbleSuccess {
    0%   { transform: scale(1); }
    40%  { transform: scale(1.04); }
    100% { transform: scale(1); }
}
@keyframes processSpin {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
@keyframes iconPulse {
    0%, 100% { transform: scale(1); }
    50%      { transform: scale(1.08); }
}

/* ── Responsive ─────────────────────────────────────── */
@media (max-width: 768px) {
    .panel-left { display: none; }
    .upload-title { font-size: 22px; }
    .upload-card { padding: 20px; }
    .messages { padding: 20px 16px; }
    .chat-input-bar { padding: 12px 16px 16px; }
    .bubble { max-width: 85%; }
    .navbar { padding: 0 16px; }
    .upload-features { flex-direction: column; align-items: center; }
}