/* LamAI Components v3 */

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.9rem;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    font-family: inherit;
    line-height: 1.4;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: var(--gradient-brand);
    color: #fff;
    box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px var(--primary-glow);
    color: #fff;
}

.btn-primary:hover::before { opacity: 1; }

.btn-primary:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-outline {
    background: var(--surface);
    border-color: var(--border);
    color: var(--text);
    box-shadow: var(--shadow-sm);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-muted);
}

.btn-ghost:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.btn-sm { padding: 0.5rem 1rem; font-size: 0.825rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; border-radius: var(--radius-sm); }
.btn-block { width: 100%; }

.btn-icon {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.05rem;
    transition: all var(--transition);
    color: var(--text-muted);
}

.btn-icon:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
    transform: scale(1.05);
}

.btn-glow {
    animation: btnGlow 3s ease infinite;
}

@keyframes btnGlow {
    0%, 100% { box-shadow: 0 6px 20px var(--primary-glow); }
    50% { box-shadow: 0 6px 30px rgba(124, 58, 237, 0.6), 0 0 40px rgba(6, 182, 212, 0.2); }
}

/* ─── Cards ─── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.card h2 {
    margin: 0 0 0.35rem;
    font-size: 1.125rem;
    font-weight: 700;
}

.card > .text-muted {
    margin: 0 0 1.25rem;
    font-size: 0.875rem;
}

/* ─── Tool cards ─── */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: all var(--transition);
    display: flex;
    gap: 1.25rem;
    position: relative;
    overflow: hidden;
    color: var(--text);
    text-decoration: none;
}

.tool-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-brand);
    opacity: 0;
    transition: opacity var(--transition);
}

.tool-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-brand);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--ease-out);
}

.tool-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: var(--border-strong);
}

.tool-card:hover::after { transform: scaleX(1); }

.tool-card > * { position: relative; z-index: 1; }

.tool-card--soon { opacity: 0.7; }
.tool-card--soon:hover { transform: translateY(-2px); }

.tool-card-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.85rem;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    border: 1px solid var(--border-strong);
}

.tool-card-body { flex: 1; min-width: 0; }

.tool-card-category {
    font-size: 0.7rem;
    color: var(--primary);
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.tool-card-title {
    margin: 0.35rem 0;
    font-size: 1.125rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.tool-card-desc {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0 0 1.25rem;
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tool-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    gap: 0.75rem;
}

.credit-badge {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 0.3rem 0.85rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border-strong);
}

.badge-free {
    background: rgba(16, 185, 129, 0.12);
    color: #059669;
    border-color: rgba(16, 185, 129, 0.25);
}

[data-theme="dark"] .badge-free {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.badge-soon {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--warning);
    background: rgba(245, 158, 11, 0.12);
    padding: 0.3rem 0.85rem;
    border-radius: var(--radius-pill);
}

/* ─── Tool workspace ─── */
.tool-workspace {
    padding: 0 0 4rem;
}

.tool-workspace--doc {
    background: var(--gradient-hero);
}

.tool-workspace-header {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.tool-workspace-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: var(--gradient-brand);
    border-radius: var(--radius);
    box-shadow: 0 8px 28px var(--primary-glow);
    flex-shrink: 0;
}

.tool-workspace-title {
    margin: 0 0 0.35rem;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.tool-workspace-desc {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.tool-workspace-grid {
    display: grid;
    grid-template-columns: minmax(0, 400px) 1fr;
    gap: 1.5rem;
    align-items: stretch;
}

.tool-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 2px);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* Result panels can stay taller; source panels grow with content (tránh flex đè layout) */
.tool-panel.result-panel {
    min-height: 420px;
    max-height: min(720px, calc(100vh - 11rem));
}

.tool-workspace--image .tool-panel:not(.result-panel),
.tool-workspace--doc .tool-panel:not(.result-panel),
.tool-workspace--slim .tool-panel:not(.result-panel) {
    max-height: none;
}

.tool-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

.tool-panel-header h2 {
    margin: 0;
    font-size: 0.925rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tool-panel-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
}

.tool-panel:not(.result-panel) .tool-panel-body > * {
    flex-shrink: 0;
}

.file-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

.upload-zone.has-file:not(.upload-zone--multi) {
    display: none !important;
}

.upload-zone--multi.has-files {
    display: none !important;
}

.ot-add-more {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-top: 0.5rem;
    padding: 0.65rem 1rem;
    border: 1.5px dashed var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--bg-alt);
    color: var(--primary-dark);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 650;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition), color var(--transition);
}

.ot-add-more:hover {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary);
}

.file-chip-body {
    min-width: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
}

.file-chip-body strong {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.875rem;
}

.file-list .file-chip {
    margin-bottom: 0;
    padding: 0.65rem 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm, 0 1px 3px rgba(15, 23, 42, 0.06));
}

.tool-panel-badge {
    font-size: 0.68rem;
    font-weight: 700;
    padding: 0.25rem 0.7rem;
    border-radius: var(--radius-pill);
    background: var(--gradient-brand);
    color: #fff;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

/* Upload zone */
.upload-zone {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius);
    padding: 2.5rem 1.5rem;
    text-align: center;
    transition: all var(--transition);
    cursor: pointer;
    background: var(--bg-alt);
    position: relative;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: var(--gradient-brand);
    opacity: 0;
    transition: opacity var(--transition);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.upload-zone:hover::before,
.upload-zone.dragover::before {
    opacity: 0.04;
}

.upload-zone > * { position: relative; z-index: 1; }

.upload-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 0.875rem;
    filter: drop-shadow(0 4px 8px rgba(124, 58, 237, 0.2));
}

.file-info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.6rem 0;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border);
}

.analysis-modes { margin-top: 1.75rem; }

.analysis-modes h3 {
    font-size: 0.8rem;
    font-weight: 800;
    margin: 0 0 0.35rem;
    color: var(--text);
    letter-spacing: 0.02em;
}

.mode-buttons { display: grid; gap: 0.5rem; margin-bottom: 1.25rem; }

.mode-btn {
    padding: 0.875rem 1rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    text-align: left;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
    font-family: inherit;
}

.mode-btn:hover,
.mode-btn.active {
    border-color: var(--primary);
    background: var(--primary-light);
    color: var(--primary-dark);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
}

.input-group { display: flex; gap: 0.5rem; }
.input-group input { flex: 1; }

/* Result / chat panel */
.result-panel {
    display: flex;
    flex-direction: column;
    border-color: var(--border-strong);
    box-shadow: var(--shadow-lg);
}

.result-panel .tool-panel-body {
    flex: 1;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

/* Doc tools: cuộn trong panel kết quả */
.tool-workspace--doc .result-panel .tool-panel-body {
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
}

.tool-workspace--doc #preview,
.transcript-preview {
    flex: 1 1 auto;
    min-height: 180px;
    max-height: none;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    user-select: text;
    -webkit-user-select: text;
    white-space: pre-wrap;
    word-break: break-word;
}

.tool-workspace--image .convert-result {
    flex: 0 0 auto;
    width: 100%;
    padding-bottom: 0.25rem;
}

.tool-workspace--image .result-panel .tool-panel-body {
    gap: 0.75rem;
}

.chat-messages {
    flex: 1 1 0;
    min-height: 0;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0.25rem 0.25rem 0.25rem 0;
    scroll-behavior: smooth;
    overscroll-behavior: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
}

.chat-messages .empty-state--compact {
    min-height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.chat-message {
    margin-bottom: 1.25rem;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
    font-size: 0.925rem;
    animation: msgIn 0.35s var(--ease-out);
}

@keyframes msgIn {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

.chat-message--user {
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(6, 182, 212, 0.08) 100%);
    margin-left: 2.5rem;
    border: 1px solid var(--border-strong);
}

.chat-message--ai {
    background: var(--bg-alt);
    margin-right: 1.5rem;
    border: 1px solid var(--border);
}

.chat-message-label {
    font-weight: 800;
    font-size: 0.68rem;
    color: var(--primary);
    margin-bottom: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.chat-message-label::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--gradient-brand);
    border-radius: 50%;
}

.chat-message-content { line-height: 1.75; }

.chat-message-content h1,
.chat-message-content h2,
.chat-message-content h3 {
    margin: 1.25rem 0 0.5rem;
    font-size: 1rem;
    font-weight: 800;
    letter-spacing: -0.01em;
}

.chat-message-content h1:first-child,
.chat-message-content h2:first-child { margin-top: 0; }

.chat-message-content p { margin: 0.5rem 0; }
.chat-message-content ul,
.chat-message-content ol { margin: 0.5rem 0; padding-left: 1.25rem; }
.chat-message-content li { margin: 0.35rem 0; }

.chat-message-content code {
    background: var(--surface);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.85em;
    border: 1px solid var(--border);
}

.chat-message-content pre {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    overflow-x: auto;
    font-size: 0.85rem;
}

.chat-message-content blockquote {
    border-left: 3px solid var(--primary);
    margin: 0.75rem 0;
    padding: 0.65rem 1rem;
    color: var(--text-muted);
    background: var(--surface);
    border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}

.chat-message-content table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    margin: 0.75rem 0;
}

.chat-message-content th,
.chat-message-content td {
    border: 1px solid var(--border);
    padding: 0.55rem 0.75rem;
    text-align: left;
}

.chat-message-content th {
    background: var(--bg-alt);
    font-weight: 700;
}

.chat-message-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 0.875rem;
}

.btn-copy {
    font-size: 0.72rem;
    padding: 0.35rem 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    cursor: pointer;
    color: var(--text-muted);
    font-family: inherit;
    font-weight: 600;
    transition: all var(--transition);
}

.btn-copy:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.result-actions--solo {
  justify-content: flex-end;
}

.result-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0.75rem 0;
}

.result-actions .btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.ai-typing {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    padding: 1.25rem;
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.ai-typing-dots span {
    display: inline-block;
    width: 7px;
    height: 7px;
    background: var(--gradient-brand);
    border-radius: 50%;
    animation: typingDot 1.2s infinite;
}

.ai-typing-dots span:nth-child(2) { animation-delay: 0.2s; }
.ai-typing-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingDot {
    0%, 60%, 100% { opacity: 0.25; transform: scale(0.75); }
    30% { opacity: 1; transform: scale(1); }
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 4rem 1.5rem;
    color: var(--text-muted);
}

.empty-state--compact { padding: 3rem 1rem; }

.empty-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    opacity: 0.85;
    filter: grayscale(0.2);
}

.empty-state h3 {
    color: var(--text);
    margin: 0 0 0.5rem;
    font-weight: 800;
    font-size: 1.125rem;
}

/* Skeleton */
.skeleton {
    background: linear-gradient(90deg, var(--bg-alt) 25%, var(--border) 50%, var(--bg-alt) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
    height: 16px;
    margin-bottom: 0.75rem;
}

.skeleton-line { width: 100%; }
.skeleton-line.short { width: 60%; }

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Toast */
.toast-container {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.toast {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.35rem;
    box-shadow: var(--shadow-lg);
    font-size: 0.875rem;
    font-weight: 500;
    animation: slideIn 0.35s var(--ease-out);
    max-width: 380px;
    backdrop-filter: blur(12px);
}

.toast--error { border-left: 4px solid var(--danger); }
.toast--success { border-left: 4px solid var(--success); }

@keyframes slideIn {
    from { transform: translateX(110%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.status-badge {
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-pill);
}

.status-success { background: rgba(16, 185, 129, 0.12); color: #059669; }
.status-failed { background: rgba(239, 68, 68, 0.12); color: #dc2626; }

.coming-soon-card {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.coming-soon-icon { font-size: 4rem; margin-bottom: 1rem; }

/* Breadcrumb */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    padding: 1.25rem 1.5rem 0;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span:last-child { color: var(--text); font-weight: 600; }

/* Document AI page */
.doc-hero {
    display: grid;
    grid-template-columns: 1.35fr 0.65fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
    align-items: start;
    padding-top: 1.5rem;
}

.doc-hero h1 {
    margin: 0 0 0.875rem;
    font-size: clamp(1.85rem, 4vw, 2.65rem);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.12;
}

.eyebrow {
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--primary);
    margin: 0 0 0.65rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.eyebrow::before {
    content: '';
    width: 20px;
    height: 2px;
    background: var(--gradient-brand);
    border-radius: 1px;
}

.lede {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin: 0 0 1.35rem;
    max-width: 600px;
    line-height: 1.75;
}

.doc-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.doc-pills span {
    background: var(--surface);
    color: var(--text);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-pill);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.doc-hero-card {
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.doc-hero-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-brand);
}

.doc-hero-card h2 {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    font-weight: 800;
}

.doc-hero-card ol {
    margin: 0;
    padding-left: 1.15rem;
    color: var(--text-muted);
}

.doc-hero-card li { margin: 0.55rem 0; font-size: 0.9rem; }
.doc-hero-card strong { color: var(--text); }

.hint {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin: 0.35rem 0 0;
    line-height: 1.5;
}

.action-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
    margin: 0.875rem 0 1.35rem;
}

.action-card {
    text-align: left;
    background: var(--bg-alt);
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    cursor: pointer;
    font-family: inherit;
    color: var(--text);
    transition: all var(--transition);
}

.action-card:hover,
.action-card.active {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.12);
    transform: translateY(-2px);
}

.action-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    font-size: 1.1rem;
    background: var(--surface);
    border-radius: var(--radius-xs);
    margin-bottom: 0.55rem;
    border: 1px solid var(--border);
}

.action-card strong {
    display: block;
    font-size: 0.875rem;
    margin-bottom: 0.2rem;
    font-weight: 700;
}

.action-card span:last-child {
    display: block;
    font-size: 0.72rem;
    color: var(--text-muted);
    line-height: 1.45;
}

.ask-box label {
    display: block;
    font-size: 0.8rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}

.suggest-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    margin-top: 0.75rem;
}

.chip {
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--text-muted);
    border-radius: var(--radius-pill);
    padding: 0.35rem 0.85rem;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: all var(--transition);
}

.chip:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.excel-presets {
    margin: 0.75rem 0 1.25rem;
}

.chip--preset {
    font-size: 0.78rem;
    padding: 0.4rem 0.85rem;
}

.md-table-wrap {
    overflow-x: auto;
    margin: 0.75rem 0;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.md-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.82rem;
}

.md-table th,
.md-table td {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    white-space: nowrap;
}

.md-table th {
    background: var(--bg-alt);
    font-weight: 700;
    color: var(--primary);
}

.chart-wrap {
    margin: 1rem 0;
    padding: 1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    max-height: 280px;
}

.chart-canvas {
    max-height: 240px;
}

.file-chip {
    display: flex;
    gap: 0.875rem;
    align-items: center;
    margin-bottom: 0.875rem;
}

.file-chip-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-brand);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 0.68rem;
    font-weight: 800;
    box-shadow: 0 4px 14px var(--primary-glow);
    flex-shrink: 0;
}

.file-chip-actions {
    display: flex;
    gap: 0.25rem;
    margin-left: auto;
    flex-shrink: 0;
}

.file-chip-actions button {
    width: 32px;
    height: 32px;
    border: 1px solid var(--border);
    background: var(--bg-alt);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text);
    font-size: 1rem;
    line-height: 1;
}

.file-chip-actions button:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.doc-guide,
.doc-faq {
    margin-top: 4rem;
    padding-top: 3rem;
    border-top: 1px solid var(--border);
}

.doc-guide h2,
.doc-faq h2 {
    font-size: 1.5rem;
    font-weight: 800;
    margin: 0 0 1.5rem;
    letter-spacing: -0.02em;
    text-align: center;
}

.guide-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.25rem;
}

.guide-grid article {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all var(--transition);
}

.guide-grid article:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow);
    transform: translateY(-3px);
}

.guide-grid h3 {
    margin: 0 0 0.5rem;
    font-size: 1rem;
    font-weight: 800;
}

.guide-grid p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.65;
}

.doc-faq details {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    margin-bottom: 0.65rem;
    transition: border-color var(--transition);
}

.doc-faq details[open] {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
}

.doc-faq summary {
    cursor: pointer;
    font-weight: 700;
    font-size: 0.925rem;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.doc-faq summary::-webkit-details-marker { display: none; }

.doc-faq summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--primary);
    font-weight: 400;
    transition: transform var(--transition);
}

.doc-faq details[open] summary::after {
    transform: rotate(45deg);
}

.doc-faq details p {
    margin: 0.75rem 0 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

.tool-seo {
    padding: 2.75rem 0 4.5rem;
}
.tool-seo-wrap {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 1.5rem;
}
.tool-seo-block:not(:last-child) {
    max-width: 40rem;
}
.tool-seo-block + .tool-seo-block {
    margin-top: 2rem;
}
.tool-seo-block h2 {
    margin: 0 0 0.65rem;
    font-size: 1.2rem;
    font-weight: 750;
    letter-spacing: -0.03em;
    line-height: 1.3;
    color: var(--text);
}
.tool-seo-block p {
    margin: 0 0 0.75rem;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text);
}
.tool-seo-block p:last-child { margin-bottom: 0; }
.tool-seo-block strong {
    font-weight: 700;
}
.tool-seo-block ul {
    margin: 0.35rem 0 0;
    padding: 0 0 0 1.15rem;
}
.tool-seo-block ul:not(.tool-seo-more) li {
    margin: 0.35rem 0;
    font-size: 0.95rem;
    line-height: 1.65;
    color: var(--text);
}
.tool-seo-more {
    margin: 0.5rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}
.tool-seo-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.1rem 1.15rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}
.tool-seo-card:hover {
    border-color: var(--border-strong);
    box-shadow: var(--shadow-sm);
    transform: translateY(-2px);
}
.tool-seo-card-icon {
    flex-shrink: 0;
    width: 52px;
    height: 52px;
    display: grid;
    place-items: center;
    font-size: 1.65rem;
    line-height: 1;
    border-radius: 12px;
    background: var(--primary-light);
    border: 1px solid var(--border-strong);
}
.tool-seo-card-body {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.tool-seo-card-title {
    display: block;
    font-size: 0.95rem;
    font-weight: 720;
    letter-spacing: -0.02em;
    line-height: 1.35;
    color: var(--text);
}
.tool-seo-card:hover .tool-seo-card-title {
    color: var(--primary);
}
.tool-seo-card-sapo {
    font-size: 0.82rem;
    line-height: 1.5;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

@media (max-width: 900px) {
    .tool-seo-more { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .tool-seo-more { grid-template-columns: 1fr; }
    .tool-seo-block:not(:last-child) { max-width: none; }
}

/* Error page */
.error-page {
    text-align: center;
    padding: 5rem 1.5rem;
    min-height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.error-card {
    max-width: 440px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: calc(var(--radius) + 4px);
    padding: 3rem 2.5rem;
    box-shadow: var(--shadow-lg);
}

.error-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
}

.error-card h1 {
    margin: 0 0 0.75rem;
    font-size: 1.5rem;
    font-weight: 800;
}

.error-card p {
    color: var(--text-muted);
    margin: 0 0 2rem;
    line-height: 1.7;
}

/* Image convert */
.format-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.65rem;
    margin: 0.75rem 0 1.25rem;
}

.format-grid--wide {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (max-width: 520px) {
    .format-grid--wide { grid-template-columns: 1fr; }
}

.format-card {
    text-align: left;
    padding: 0.9rem 1rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    cursor: pointer;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    font-family: inherit;
}

.format-card strong {
    display: block;
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.format-card span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.format-card:hover {
    border-color: var(--primary);
}

.format-card.is-active {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.format-card.is-disabled,
.format-card:disabled {
    opacity: 0.45;
    cursor: not-allowed;
    pointer-events: none;
}

.image-preview-wrap {
    margin: 0.85rem 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg);
    max-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-preview-wrap img {
    max-width: 100%;
    max-height: 220px;
    object-fit: contain;
    display: block;
    -webkit-user-drag: none;
    user-select: none;
}

.result-panel img,
.convert-result img {
    -webkit-user-drag: none;
}

.convert-result {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.convert-meta {
    display: grid;
    gap: 0.65rem;
}

.convert-meta > div {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    font-size: 0.9rem;
}

.convert-meta strong {
    word-break: break-all;
}

.convert-file-ready {
    text-align: center;
    padding: 1.5rem 1rem;
}

.convert-file-ready .convert-file-icon {
    display: block;
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.convert-file-ready strong {
    display: block;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.convert-file-ready p {
    margin: 0;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.55;
}

.image-preview-wrap img.hidden,
.convert-file-ready.hidden {
    display: none !important;
}

/* Image edit */
.mode-buttons--tabs {
    grid-template-columns: 1fr 1fr;
}

.edit-panel {
    margin-bottom: 1rem;
}

.edit-panel.hidden {
    display: none;
}

.edit-dimension-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem;
    margin: 0.75rem 0;
}

.edit-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    font-size: 0.85rem;
}

.edit-field input[type="number"],
.edit-field input[type="range"] {
    width: 100%;
    padding: 0.55rem 0.75rem;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    font-family: inherit;
    font-size: 0.9rem;
}

.edit-field--slider input[type="range"] {
    padding: 0;
    border: none;
    background: transparent;
}

.edit-checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    margin: 0.5rem 0 1rem;
    cursor: pointer;
}

.edit-presets,
.edit-output-format {
    margin: 0.75rem 0;
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.format-grid--compact {
    margin-top: 0.5rem;
}

.image-preview-wrap--checker {
    background-color: #e8e8e8;
    background-image:
        linear-gradient(45deg, #ccc 25%, transparent 25%),
        linear-gradient(-45deg, #ccc 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #ccc 75%),
        linear-gradient(-45deg, transparent 75%, #ccc 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

[data-theme="dark"] .image-preview-wrap--checker {
    background-color: #2a2a2a;
    background-image:
        linear-gradient(45deg, #3a3a3a 25%, transparent 25%),
        linear-gradient(-45deg, #3a3a3a 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #3a3a3a 75%),
        linear-gradient(-45deg, transparent 75%, #3a3a3a 75%);
}

@media (max-width: 520px) {
    .edit-dimension-grid { grid-template-columns: 1fr; }
}

/* File chat */
.tool-workspace--file-chat .result-panel--chat .tool-panel-body {
    overflow: hidden;
}

.file-chat-compose {
    flex-shrink: 0;
    margin-top: auto;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.file-chat-input {
    resize: vertical;
    min-height: 2.75rem;
    max-height: 8rem;
    font-family: inherit;
    line-height: 1.5;
}

.file-chat-suggestions {
    margin-top: 1.25rem;
}

.file-chat-suggestions.hidden {
    display: none;
}

.file-preview-text {
    margin: 0.75rem 0;
    font-size: 0.85rem;
    line-height: 1.55;
    color: var(--text-muted);
    border-left: 3px solid var(--primary);
    padding-left: 0.75rem;
}

.file-preview-text.hidden {
    display: none;
}

@media (max-width: 900px) {
    .tool-workspace-grid { grid-template-columns: 1fr; }
    .tool-panel.result-panel {
        min-height: 360px;
        max-height: min(560px, calc(100vh - 10rem));
    }
    .tool-workspace--image .result-panel {
        max-height: min(640px, calc(100vh - 8rem));
    }
    .tool-workspace--image .image-preview-wrap {
        max-height: min(200px, 35vh);
    }
    .tool-workspace--image .image-preview-wrap img {
        max-height: min(200px, 35vh);
    }
    .chat-message--user { margin-left: 0; }
    .chat-message--ai { margin-right: 0; }
    .doc-hero,
    .action-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .tool-grid { grid-template-columns: 1fr; }
}