/* ========================================
   workbench-ai.css - UI-3 AI Skill Workbench
   .pu- scoped namespace, additive only
   ======================================== */

/* ---- View scroll container ---- */
.pu-wb-ai-view-scroll {
    width: 100%;
    height: 100vh;
    overflow-y: auto;
    background: var(--surface-soft);
}

/* ---- Container ---- */
.pu-wb-ai-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: var(--space-xl);
}

/* ---- Header ---- */
.pu-wb-ai-header {
    margin-bottom: var(--space-md);
}

.pu-wb-ai-header-top {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.pu-wb-ai-back {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: var(--text-body-md);
    color: var(--info);
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    white-space: nowrap;
    flex-shrink: 0;
}

.pu-wb-ai-back:hover {
    text-decoration: underline;
}

.pu-wb-ai-back:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}

.pu-wb-ai-header-info {
    flex: 1;
    min-width: 0;
}

.pu-wb-ai-title {
    font-size: var(--text-title-md);
    font-weight: 700;
    color: var(--ink);
    margin: 0 0 var(--space-xs);
}

.pu-wb-ai-badges {
    display: flex;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.pu-wb-ai-breadcrumb {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: var(--text-caption);
    color: var(--text-secondary);
}

.pu-wb-ai-breadcrumb-label {
    color: var(--body);
}

.pu-wb-ai-breadcrumb-sep {
    color: var(--text-secondary);
}

/* ---- Banner ---- */
.pu-wb-ai-banner {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--warning-bg, #fffbe6);
    border: 1px solid var(--warning-border, #ffe58f);
    border-radius: var(--radius-sm);
    font-size: var(--text-caption);
    color: var(--body);
    margin-bottom: var(--space-lg);
}

.pu-wb-ai-banner-icon {
    font-size: 18px;
    flex-shrink: 0;
}

/* ---- Body Layout ---- */
.pu-wb-ai-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    align-items: start;
}

/* ---- Left Panel ---- */
.pu-wb-ai-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* ---- Right Panel ---- */
.pu-wb-ai-right {
    background: var(--canvas);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.pu-wb-ai-right-empty {
    text-align: center;
    padding: var(--space-xl) var(--space-md);
    border-bottom: 1px solid var(--hairline);
}

.pu-wb-ai-empty-text {
    font-size: var(--text-body-md);
    color: var(--text-secondary);
    margin: 0;
}

/* ---- Section ---- */
.pu-wb-ai-section {
    background: var(--canvas);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    padding: var(--space-md);
}

.pu-wb-ai-section--warn {
    background: var(--warning-bg, #fffbe6);
    border-color: var(--warning-border, #ffe58f);
}

.pu-wb-ai-section-title {
    font-size: var(--text-label-md);
    font-weight: 600;
    color: var(--ink);
    margin: 0 0 var(--space-sm);
}

.pu-wb-ai-desc {
    font-size: var(--text-body-md);
    color: var(--body);
    line-height: var(--leading-relaxed);
    margin: 0 0 var(--space-sm);
}

.pu-wb-ai-context {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-size: var(--text-body-md);
    color: var(--body);
}

.pu-wb-ai-context-item {
    display: inline-block;
    padding: 4px var(--space-sm);
    background: var(--surface-soft);
    border-radius: var(--radius-sm);
    font-size: var(--text-caption);
}

.pu-wb-ai-context-missing {
    font-size: var(--text-caption);
    color: var(--text-secondary);
    margin: 0;
}

/* ---- Capabilities ---- */
.pu-wb-ai-cap-list {
    margin: 0;
    padding-left: 20px;
    font-size: var(--text-body-md);
    color: var(--body);
    line-height: var(--leading-relaxed);
}

.pu-wb-ai-cap-item {
    margin-bottom: 4px;
}

/* ---- Input ---- */
.pu-wb-ai-input-guidance {
    font-size: var(--text-caption);
    color: var(--text-secondary);
    margin: 0 0 var(--space-sm);
}

.pu-wb-ai-type-hints {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    flex-wrap: wrap;
    margin-bottom: var(--space-sm);
}

.pu-wb-ai-type-hints-label {
    font-size: var(--text-small);
    color: var(--text-secondary);
}

.pu-wb-ai-type-tag {
    display: inline-block;
    padding: 2px 8px;
    background: var(--tag-bg);
    color: var(--tag-text);
    border: 1px solid var(--tag-border);
    border-radius: var(--radius-pill);
    font-size: var(--text-small);
}

.pu-wb-ai-textarea {
    width: 100%;
    padding: var(--space-sm);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-sm);
    font-size: var(--text-body-md);
    font-family: var(--font-body);
    line-height: var(--leading-relaxed);
    resize: vertical;
    background: var(--canvas);
    transition: border-color var(--transition-fast);
    box-sizing: border-box;
}

.pu-wb-ai-textarea:focus {
    border-color: var(--info);
    box-shadow: 0 0 0 2px var(--info-bg);
    outline: none;
}

.pu-wb-ai-textarea::placeholder {
    color: var(--text-secondary);
}

/* ---- Actions ---- */
.pu-wb-ai-actions {
    display: flex;
    gap: var(--space-sm);
}

.pu-wb-ai-actions--right {
    justify-content: flex-end;
    padding-top: var(--space-sm);
    border-top: 1px solid var(--hairline);
}

/* ---- Buttons ---- */
.pu-wb-ai-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px var(--space-lg);
    border-radius: var(--radius-sm);
    font-size: var(--text-body-md);
    font-weight: 500;
    cursor: not-allowed;
    transition: all var(--transition-fast);
    border: 1px solid var(--hairline);
    font-family: var(--font-body);
}

.pu-wb-ai-btn:disabled {
    opacity: 0.6;
}

.pu-wb-ai-btn--generate {
    background: var(--primary);
    color: var(--on-primary);
    border-color: var(--primary);
}

.pu-wb-ai-btn--generate:hover {
    background: var(--primary-active);
    border-color: var(--primary-active);
}

.pu-wb-ai-btn--save {
    background: var(--canvas);
    color: var(--primary);
    border-color: var(--primary);
}

.pu-wb-ai-btn--save:hover {
    background: var(--surface-soft);
}

/* ---- Preview Sections ---- */
.pu-wb-ai-preview-section {
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--hairline);
}

.pu-wb-ai-preview-section:last-of-type {
    border-bottom: none;
    padding-bottom: 0;
}

.pu-wb-ai-preview-heading {
    font-size: var(--text-label-sm);
    font-weight: 600;
    color: var(--body);
    margin: 0 0 4px;
}

.pu-wb-ai-preview-placeholder {
    font-size: var(--text-caption);
    color: var(--text-secondary);
    margin: 0;
    font-style: italic;
}

/* ========================================
   Intro Page Workbench CTA (render on function-intro page)
   ======================================== */

.pu-fc-intro-workbench-cta {
    margin-top: var(--space-lg);
    padding: var(--space-lg);
    background: var(--canvas);
    border: 1px solid var(--hairline);
    border-radius: var(--radius-md);
    text-align: center;
}

.pu-fc-intro-workbench-hint {
    font-size: var(--text-caption);
    color: var(--text-secondary);
    margin: 0 0 var(--space-md);
}

.pu-fc-intro-workbench-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px var(--space-xl);
    border-radius: var(--radius-sm);
    font-size: var(--text-body-md);
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--primary);
    background: var(--primary);
    color: var(--on-primary);
    font-family: var(--font-body);
    transition: all var(--transition-fast);
}

.pu-fc-intro-workbench-btn:hover {
    background: var(--primary-active);
    border-color: var(--primary-active);
}

.pu-fc-intro-workbench-btn:focus-visible {
    outline: 2px solid var(--info);
    outline-offset: 2px;
}

/* ========================================
   Responsive
   ======================================== */
@media (max-width: 768px) {
    .pu-wb-ai-body {
        grid-template-columns: 1fr;
    }

    .pu-wb-ai-container {
        padding: var(--space-md);
    }

    .pu-wb-ai-header-top {
        flex-direction: column;
        gap: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .pu-wb-ai-title {
        font-size: var(--text-title-sm);
    }
}

/* ========================================
   2026 visual refresh — AI skill workbench
   ======================================== */
.pu-wb-ai-view-scroll {
    background:
        radial-gradient(circle at 96% 0%, rgba(78, 116, 213, .07), transparent 25%),
        #f7f9fc;
}

.pu-wb-ai-container {
    max-width: 1120px;
    padding: 20px 32px 48px;
}

.pu-wb-ai-header {
    position: relative;
    margin: 0 0 10px;
    padding: 13px 20px 17px;
    overflow: hidden;
    background:
        radial-gradient(circle at 87% -30%, rgba(78,116,213,.15), transparent 42%),
        linear-gradient(135deg, #fbfdff, #edf3ff);
    border: 1px solid #d9e4f3;
    border-radius: 19px;
    box-shadow: 0 9px 26px rgba(44,67,105,.06);
}

.pu-wb-ai-header-top {
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 11px;
    padding-bottom: 10px;
    border-bottom: 1px solid #dce5f1;
}

.pu-wb-ai-back {
    padding: 6px 9px;
    color: #596880;
    background: rgba(255,255,255,.72);
    border: 1px solid #d9e2ee;
    border-radius: 8px;
    font-size: 11.5px;
    font-weight: 650;
}

.pu-wb-ai-back:hover {
    color: #315fcc;
    background: #fff;
    text-decoration: none;
}

.pu-wb-ai-mode {
    color: #8f9caf;
    font-size: 9px;
    font-weight: 750;
    letter-spacing: .16em;
}

.pu-wb-ai-header-main {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) auto;
    align-items: center;
    gap: 12px;
}

.pu-wb-ai-header-icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    color: #416bd0;
    background: #fff;
    border: 1px solid #cbdaf3;
    border-radius: 13px;
    box-shadow: 0 7px 16px rgba(53,82,143,.10);
}

.pu-wb-ai-header-icon svg {
    width: 22px;
    height: 22px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.6;
}

.pu-wb-ai-header-info {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 10px;
}

.pu-wb-ai-title {
    margin: 0;
    color: #172036;
    font-size: 21px;
    font-weight: 750;
    letter-spacing: -.025em;
}

.pu-wb-ai-badges {
    gap: 5px;
}

.pu-wb-ai-breadcrumb {
    justify-content: flex-end;
    gap: 5px;
    color: #9aa5b5;
    font-size: 10px;
}

.pu-wb-ai-breadcrumb-label {
    color: #718097;
}

.pu-wb-ai-banner {
    min-height: 42px;
    margin-bottom: 12px;
    padding: 8px 11px;
    color: #80652d;
    background: #fffaf0;
    border: 1px solid #f0e1bf;
    border-radius: 11px;
    font-size: 11px;
    line-height: 1.55;
}

.pu-wb-ai-banner-icon {
    display: grid;
    place-items: center;
    flex: 0 0 28px;
    width: 28px;
    height: 28px;
    color: #b28730;
    background: #fff3d7;
    border-radius: 8px;
    font-size: 0;
}

.pu-wb-ai-banner-icon svg {
    width: 16px;
    height: 16px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.pu-wb-ai-body {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: 13px;
}

.pu-wb-ai-left {
    gap: 10px;
}

.pu-wb-ai-section,
.pu-wb-ai-right {
    background: #fff;
    border: 1px solid #e0e6ed;
    border-radius: 15px;
    box-shadow: 0 5px 16px rgba(35,53,83,.035);
}

.pu-wb-ai-section {
    padding: 15px;
}

.pu-wb-ai-section--warn {
    background: #fffaf0;
    border-color: #f0e1bf;
}

.pu-wb-ai-section-title {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 0 0 9px;
    color: #2c394f;
    font-size: 14px;
    font-weight: 720;
}

.pu-wb-ai-section-title::before {
    content: "";
    width: 6px;
    height: 6px;
    background: #5073cc;
    border-radius: 50%;
    box-shadow: 0 0 0 4px #edf3ff;
}

.pu-wb-ai-desc,
.pu-wb-ai-context-missing {
    color: #6e7b90;
    font-size: 11.5px;
    line-height: 1.7;
}

.pu-wb-ai-context {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 7px;
}

.pu-wb-ai-context-item {
    padding: 8px 9px;
    color: #56647a;
    background: #f6f8fb;
    border: 1px solid #e8ecf1;
    border-radius: 9px;
    font-size: 11px;
}

.pu-wb-ai-cap-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 6px;
    margin-top: 9px;
    padding: 0;
    list-style: none;
}

.pu-wb-ai-cap-item {
    position: relative;
    margin: 0;
    padding: 7px 8px 7px 20px;
    color: #657288;
    background: #f7f9fb;
    border: 1px solid #ebeff3;
    border-radius: 9px;
    font-size: 10.5px;
    line-height: 1.5;
}

.pu-wb-ai-cap-item::before {
    content: "✓";
    position: absolute;
    top: 7px;
    left: 8px;
    color: #4c70c8;
    font-size: 10px;
    font-weight: 800;
}

.pu-wb-ai-input-guidance {
    margin: 0 0 8px;
    color: #7f8b9e;
    font-size: 10.5px;
    line-height: 1.6;
}

.pu-wb-ai-type-hints {
    gap: 4px;
    margin-bottom: 8px;
}

.pu-wb-ai-type-hints-label {
    font-size: 10px;
}

.pu-wb-ai-type-tag {
    padding: 3px 7px;
    color: #5870a8;
    background: #eef3ff;
    border-color: #d5e0f7;
    font-size: 9.5px;
}

.pu-wb-ai-textarea,
.pu-wb-ai-select {
    width: 100%;
    color: #46536a;
    background: #f7f9fb;
    border: 1px solid #dfe5ed;
    border-radius: 10px;
    outline: 0;
    font-size: 12px;
}

.pu-wb-ai-textarea {
    min-height: 132px;
    padding: 10px;
}

.pu-wb-ai-select {
    height: 38px;
    padding: 0 10px;
}

.pu-wb-ai-textarea:focus,
.pu-wb-ai-select:focus {
    background: #fff;
    border-color: #7896e4;
    box-shadow: 0 0 0 3px rgba(49,95,204,.08);
}

.pu-wb-ai-actions {
    margin-top: -2px;
}

.pu-wb-ai-btn {
    min-height: 37px;
    padding: 0 14px;
    border-radius: 9px;
    font-size: 11px;
    font-weight: 680;
}

.pu-wb-ai-btn--generate {
    width: 100%;
    color: #fff;
    background: #172443;
    border-color: #172443;
}

.pu-wb-ai-btn--generate:hover {
    background: #315fcc;
    border-color: #315fcc;
}

.pu-wb-ai-right {
    position: sticky;
    top: 0;
    gap: 0;
    min-height: 520px;
    padding: 17px;
}

.pu-wb-ai-right-empty {
    display: flex;
    min-height: 145px;
    padding: 25px 18px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background:
        radial-gradient(circle at 50% 25%, rgba(76,112,207,.06), transparent 34%),
        #fafbfd;
    border: 1px dashed #dbe3ed;
    border-radius: 12px;
}

.pu-wb-ai-empty-icon {
    display: grid;
    place-items: center;
    width: 43px;
    height: 43px;
    margin-bottom: 10px;
    color: #4b70c9;
    background: #edf3ff;
    border-radius: 13px;
}

.pu-wb-ai-empty-icon svg {
    width: 21px;
    height: 21px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.pu-wb-ai-empty-text {
    max-width: 300px;
    color: #8490a2;
    font-size: 11px;
    line-height: 1.65;
}

.pu-wb-ai-preview-section {
    padding: 13px 2px;
    border-bottom: 1px solid #edf0f4;
}

.pu-wb-ai-preview-heading {
    margin: 0 0 5px;
    color: #344258;
    font-size: 12.5px;
}

.pu-wb-ai-preview-placeholder {
    color: #a0a9b7;
    font-size: 10.5px;
    font-style: normal;
}

.pu-wb-ai-actions--right {
    margin-top: auto;
    padding-top: 12px;
    border-top: 1px solid #edf0f4;
}

.pu-wb-ai-btn--save {
    color: #778399;
    background: #f5f7fa;
    border-color: #e0e5ec;
}

@media (max-width: 840px) {
    .pu-wb-ai-body {
        grid-template-columns: 1fr;
    }

    .pu-wb-ai-right {
        position: static;
    }
}

@media (max-width: 680px) {
    .pu-wb-ai-container {
        padding: 16px 16px 36px;
    }

    .pu-wb-ai-header-info {
        align-items: flex-start;
        flex-direction: column;
    }

    .pu-wb-ai-header-main {
        grid-template-columns: 42px 1fr;
    }

    .pu-wb-ai-breadcrumb {
        grid-column: 1 / -1;
        justify-content: flex-start;
    }

    .pu-wb-ai-cap-list {
        grid-template-columns: 1fr;
    }
}