/* ═══════════════════════════════════════════════════════════════
   VYOMA AI — Mobile & File Upload Enhancements v1.0
   ─────────────────────────────────────────────────────────────
   • Horizontal scrollable suggestion chips with snap
   • Enhanced file upload preview cards (multi-file)
   • Improved lightbox zoom modal
   • Mobile-first responsive layout
   • Touch-friendly interactions
   ═══════════════════════════════════════════════════════════════ */

/* ─── SUGGESTION CHIPS — Horizontal Scroll Snap ────────────── */
.welcome-screen .suggestions,
.welcome-screen .hero-suggestions {
    scroll-snap-type: x mandatory !important;
    -webkit-overflow-scrolling: touch !important;
    scroll-behavior: smooth !important;
    scroll-padding: 0 16px !important;
}

.welcome-screen .suggestion-chip,
.welcome-screen .hero-chip {
    scroll-snap-align: start !important;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease !important;
}

.welcome-screen .suggestion-chip:active,
.welcome-screen .hero-chip:active {
    transform: scale(0.97) !important;
}

/* ─── MULTI-FILE PREVIEW BAR — Above input ─────────────────── */
.akira-upload-preview {
    flex-wrap: wrap !important;
    gap: 8px !important;
    padding: 10px 14px !important;
    margin-bottom: 8px !important;
    background: var(--bg-surface, #1a1a1a) !important;
    border: 1px solid var(--border, #2a2a2a) !important;
    border-radius: 14px !important;
    animation: vuSlideUp 0.3s cubic-bezier(0.16, 1, 0.3, 1) !important;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1) !important;
    max-height: 200px !important;
    overflow-y: auto !important;
}

/* Multi-file card layout */
.akira-preview-card {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    background: var(--bg-elevated, rgba(255, 255, 255, 0.04));
    border: 1px solid var(--border, rgba(255, 255, 255, 0.08));
    border-radius: 12px;
    min-width: 0;
    flex: 0 0 auto;
    max-width: 240px;
    position: relative;
    transition: all 0.2s ease;
    cursor: default;
}

.akira-preview-card:hover {
    border-color: var(--accent, #6366f1);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.12);
}

.akira-preview-card .akira-preview-thumb {
    width: 44px;
    height: 44px;
    object-fit: cover;
    border-radius: 8px;
    flex-shrink: 0;
    border: 1px solid var(--border, rgba(255, 255, 255, 0.06));
    cursor: pointer;
    transition: transform 0.15s ease;
}

.akira-preview-card .akira-preview-thumb:hover {
    transform: scale(1.05);
}

.akira-preview-card-info {
    min-width: 0;
    flex: 1;
}

.akira-preview-card-name {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary, #e5e5e5);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

.akira-preview-card-meta {
    font-size: 0.7rem;
    color: var(--text-muted, #9ca3af);
    margin-top: 2px;
}

.akira-preview-card-remove {
    position: absolute;
    top: -6px;
    right: -6px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #1a1a1a;
    border: 1px solid #333;
    border-radius: 50%;
    color: #9ca3af;
    cursor: pointer;
    font-size: 10px;
    line-height: 1;
    transition: all 0.15s ease;
    z-index: 2;
    opacity: 0;
}

.akira-preview-card:hover .akira-preview-card-remove {
    opacity: 1;
}

.akira-preview-card-remove:hover {
    background: #ef4444;
    border-color: #ef4444;
    color: #fff;
    transform: scale(1.15);
}

/* File type icon in preview card */
.akira-preview-card-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-soft, rgba(99, 102, 241, 0.08));
    border-radius: 10px;
    flex-shrink: 0;
    font-size: 1.3rem;
}

/* Preview cards horizontal scroll on mobile */
.akira-preview-cards-scroll {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    -ms-overflow-style: none;
    scrollbar-width: none;
    -webkit-overflow-scrolling: touch;
    scroll-snap-type: x mandatory;
    padding: 2px 0;
    flex: 1;
    min-width: 0;
}

.akira-preview-cards-scroll::-webkit-scrollbar {
    display: none;
}

.akira-preview-cards-scroll .akira-preview-card {
    scroll-snap-align: start;
}

/* ─── ENHANCED LIGHTBOX ────────────────────────────────────── */
.akira-lightbox {
    -webkit-tap-highlight-color: transparent;
}

.akira-lightbox-backdrop {
    transition: opacity 0.25s ease !important;
}

.akira-lightbox-content {
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    gap: 12px !important;
}

.akira-lightbox-content img {
    user-select: none;
    -webkit-user-drag: none;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.akira-lightbox-close {
    position: fixed !important;
    top: 16px !important;
    right: 16px !important;
    width: 40px !important;
    height: 40px !important;
    background: rgba(0, 0, 0, 0.6) !important;
    backdrop-filter: blur(12px) !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    z-index: 10001 !important;
    font-size: 1.1rem !important;
}

/* ─── UPLOAD BUTTON POLISH ─────────────────────────────────── */
.akira-upload-btn {
    border-radius: 10px !important;
}

/* ─── ANIMATIONS ───────────────────────────────────────────── */
@keyframes vuSlideUp {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

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

@keyframes vuCardPop {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* ═══════════════════════════════════════════════════════════════
   MOBILE — 768px and below
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {

    /* Sidebar: closed by default, open only with .open class (menu button) */
    .sidebar {
        position: fixed !important;
        z-index: 100 !important;
        left: 0 !important;
        top: 0 !important;
        bottom: 0 !important;
        width: min(85vw, 280px) !important;
        min-width: 0 !important;
        transform: translateX(-100%) !important;
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1) !important;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3) !important;
    }

    .sidebar.open {
        transform: translateX(0) !important;
    }

    /* Keep sidebar closed when it has collapsed (desktop state); on mobile only .open shows it */
    .sidebar.collapsed {
        transform: translateX(-100%) !important;
    }

    .sidebar.collapsed.open {
        transform: translateX(0) !important;
    }

    /* Overlay: visible only when sidebar is open, blocks interaction, tap to close */
    .sidebar-overlay {
        display: block !important;
        pointer-events: none !important;
        opacity: 0 !important;
        visibility: hidden !important;
        transition: opacity 0.25s ease, visibility 0.25s ease !important;
        z-index: 99 !important;
    }

    .sidebar-overlay.active {
        pointer-events: auto !important;
        opacity: 1 !important;
        visibility: visible !important;
    }

    /* Prevent background scroll when sidebar is open */
    body.sidebar-open-mobile {
        overflow: hidden !important;
        position: fixed !important;
        width: 100% !important;
        height: 100% !important;
    }

    /* Suggestion chips — vertical stack: one card per row on mobile */
    .welcome-screen .suggestions,
    .welcome-screen .hero-suggestions {
        display: grid !important;
        grid-template-columns: 1fr !important;
        gap: 16px !important;
        justify-content: stretch !important;
        padding: 0 16px !important;
        overflow-x: visible !important;
        scroll-snap-type: none !important;
        -ms-overflow-style: auto !important;
        scrollbar-width: auto !important;
        margin-bottom: 24px !important;
    }

    .welcome-screen .suggestion-chip,
    .welcome-screen .hero-chip {
        width: 100% !important;
        min-width: 0 !important;
        max-width: none !important;
        scroll-snap-align: none !important;
        padding: 12px 16px !important;
    }

    /* Preview bar mobile */
    .akira-upload-preview {
        padding: 8px 10px !important;
        border-radius: 12px !important;
        margin-bottom: 6px !important;
    }

    .akira-preview-card {
        max-width: 200px;
        padding: 6px 10px;
    }

    .akira-preview-card .akira-preview-thumb {
        width: 36px;
        height: 36px;
    }

    .akira-preview-card-icon {
        width: 36px;
        height: 36px;
        font-size: 1.1rem;
    }

    .akira-preview-card-name {
        font-size: 0.75rem;
    }

    .akira-preview-card-remove {
        opacity: 1;
        top: -4px;
        right: -4px;
        width: 18px;
        height: 18px;
        font-size: 9px;
    }

    /* Lightbox on mobile */
    .akira-lightbox-content img {
        max-width: 96vw !important;
        max-height: 80vh !important;
        border-radius: 8px !important;
    }

    .akira-lightbox-close {
        top: 10px !important;
        right: 10px !important;
        width: 36px !important;
        height: 36px !important;
    }

    /* Image bubble mobile */
    .akira-image-bubble {
        max-width: 240px !important;
    }

    .akira-chat-image {
        max-width: 240px !important;
    }

    /* Input area — ensure buttons stay visible */
    .input-wrapper {
        gap: 6px !important;
    }
}

/* ═══════════════════════════════════════════════════════════════
   MOBILE SMALL — 480px and below (tighter spacing, keep single column)
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {

    /* Starter prompt cards: keep single column, slightly tighter padding */
    .welcome-screen .suggestions,
    .welcome-screen .hero-suggestions {
        gap: 14px !important;
        padding: 0 12px !important;
    }

    .welcome-screen .suggestion-chip,
    .welcome-screen .hero-chip {
        padding: 10px 14px !important;
    }

    .hero-chip-title {
        font-size: 12px !important;
    }

    .hero-chip-desc {
        font-size: 10.5px !important;
    }

    /* Preview card — compact */
    .akira-preview-card {
        max-width: 170px;
        padding: 5px 8px;
        gap: 8px;
    }

    .akira-preview-card .akira-preview-thumb {
        width: 32px;
        height: 32px;
        border-radius: 6px;
    }

    .akira-preview-card-icon {
        width: 32px;
        height: 32px;
        font-size: 1rem;
        border-radius: 8px;
    }

    /* Image bubble — smaller on tiny screens */
    .akira-image-bubble,
    .akira-chat-image {
        max-width: 200px !important;
    }
}

/* ═══════════════════════════════════════════════════════════════
   DRAG & DROP OVERLAY
   ═══════════════════════════════════════════════════════════════ */
.main-area.akira-drag-over {
    position: relative;
}

.main-area.akira-drag-over::after {
    content: 'Drop files here';
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 3px dashed rgba(99, 102, 241, 0.6);
    color: #a5b4fc;
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    pointer-events: none;
    animation: vuFadeIn 0.15s ease;
}

@keyframes vuFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* ═══════════════════════════════════════════════════════════════
   LIGHT MODE ADJUSTMENTS
   ═══════════════════════════════════════════════════════════════ */
:root.light .akira-preview-card {
    background: #f9fafb;
    border-color: #e5e5e5;
}

:root.light .akira-preview-card:hover {
    border-color: #6366f1;
}

:root.light .akira-preview-card-name {
    color: #111827;
}

:root.light .akira-preview-card-meta {
    color: #6b7280;
}

:root.light .akira-preview-card-remove {
    background: #f3f4f6;
    border-color: #d1d5db;
    color: #6b7280;
}

:root.light .akira-preview-card-remove:hover {
    background: #ef4444;
    border-color: #ef4444;
    color: #fff;
}

:root.light .akira-upload-preview {
    background: #ffffff !important;
    border-color: #e5e5e5 !important;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06) !important;
}