:root {
    --pba-navy: #1a3a5c;
    --pba-teal: #0f6e56;
    --pba-ink: #172033;
    --pba-muted: #5f6b7a;
    --pba-border: #dce3ec;
    --pba-surface: #f7fafc;
    --pba-white: #ffffff;
}

.pba-hero,
.pba-card,
.pba-admin-wrap {
    box-sizing: border-box;
}

.pba-hero {
    padding: clamp(2rem, 5vw, 4rem);
    border: 1px solid var(--pba-border);
    border-radius: 24px;
    background: linear-gradient(135deg, var(--pba-surface), var(--pba-white));
    margin: 0 0 2rem;
}

.pba-kicker {
    color: var(--pba-teal);
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
    margin: 0 0 .75rem;
}

.pba-hero h1 {
    color: var(--pba-navy);
    font-size: clamp(2rem, 5vw, 4rem);
    line-height: 1.05;
    margin: 0 0 1rem;
}

.pba-hero p {
    color: var(--pba-muted);
    max-width: 820px;
    font-size: 1.1rem;
}

.pba-search {
    display: flex;
    gap: .75rem;
    max-width: 920px;
    margin-top: 1.5rem;
}

.pba-search input[type="search"] {
    flex: 1;
    min-height: 52px;
    border: 1px solid var(--pba-border);
    border-radius: 14px;
    padding: 0 1rem;
    font-size: 1rem;
}

.pba-search button {
    min-height: 52px;
    border: 0;
    border-radius: 14px;
    background: var(--pba-navy);
    color: var(--pba-white);
    padding: 0 1.2rem;
    font-weight: 700;
    cursor: pointer;
}

.pba-search button:focus,
.pba-search input:focus {
    outline: 3px solid rgba(15, 110, 86, .28);
    outline-offset: 2px;
}

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

.pba-card {
    border: 1px solid var(--pba-border);
    border-radius: 18px;
    padding: 1.25rem;
    background: var(--pba-white);
    box-shadow: 0 10px 24px rgba(26, 58, 92, .06);
}

.pba-card h2 {
    color: var(--pba-navy);
    font-size: 1.25rem;
    margin: 0 0 .5rem;
}

.pba-card p {
    color: var(--pba-muted);
    margin: 0;
}

@media (max-width: 640px) {
    .pba-search {
        flex-direction: column;
    }

    .pba-search button {
        width: 100%;
    }
}

.pba-section {
    margin: 2rem 0;
}

.pba-actions {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    margin-top: 1rem;
}

.pba-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    padding: .75rem 1rem;
    text-decoration: none;
    font-weight: 700;
    border: 1px solid currentColor;
}

.pba-button-secondary {
    background: transparent;
}

.pba-gate {
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 18px;
    padding: 1.5rem;
    margin: 1.5rem 0;
    background: rgba(255,255,255,.92);
}

.pba-meta-line {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    font-size: .875rem;
    margin-bottom: .75rem;
}

.pba-meta-line span {
    border: 1px solid rgba(0,0,0,.12);
    border-radius: 999px;
    padding: .2rem .55rem;
}

.pba-content-card h3 {
    margin-top: 0;
}

.pba-empty {
    border: 1px dashed rgba(0,0,0,.25);
    border-radius: 14px;
    padding: 1rem;
}

.pba-meta-grid input,
.pba-meta-grid select,
.pba-meta-grid textarea {
    max-width: 100%;
}

/* Stage 3 Learning Path System */
.pba-learning-path,
.pba-completion,
.pba-lesson-nav {
    margin: 2rem 0;
}
.pba-path-header,
.pba-next-action,
.pba-completion {
    border: 1px solid rgba(26, 58, 92, 0.16);
    border-radius: 16px;
    padding: 1.25rem;
    background: #fff;
}
.pba-progress {
    width: 100%;
    height: 12px;
    border-radius: 999px;
    background: rgba(26, 58, 92, 0.12);
    overflow: hidden;
    margin: 1rem 0 .5rem;
}
.pba-progress span {
    display: block;
    height: 100%;
    background: currentColor;
}
.pba-sequence-list {
    list-style: none;
    padding: 0;
    margin: 1.25rem 0;
    display: grid;
    gap: 1rem;
}
.pba-sequence-item {
    border: 1px solid rgba(26, 58, 92, 0.16);
    border-radius: 16px;
    padding: 1rem 1.25rem;
    background: #fff;
}
.pba-sequence-item.is-complete {
    border-width: 2px;
}
.pba-sequence-item.is-locked {
    opacity: .78;
}
.pba-lesson-nav {
    display: flex;
    flex-wrap: wrap;
    gap: .75rem;
    align-items: center;
}
@media (max-width: 700px) {
    .pba-lesson-nav .pba-button {
        width: 100%;
        text-align: center;
    }
}

/* Stage 4: Membership commerce and public SEO content */
.pba-membership-cta {
    margin: 2rem 0;
    padding: 2rem;
    border-radius: 18px;
    background: linear-gradient(135deg, rgba(26, 58, 92, 0.08), rgba(244, 170, 117, 0.16));
    border: 1px solid rgba(26, 58, 92, 0.12);
}
.pba-premium-card {
    border-top: 4px solid #1a3a5c;
}
.pba-public-guides .pba-card {
    border-top: 4px solid #0f6e56;
}
.pba-meta-grid hr {
    border: 0;
    border-top: 1px solid #dcdcde;
    margin: 1rem 0;
}

/* Stage 5 Content Studio */
.pba-admin-panel,
.pba-content-studio-box {
    background: #fff;
    border: 1px solid #dcdcde;
    border-radius: 10px;
    padding: 18px;
    margin: 16px 0;
}
.pba-content-studio-box select,
.pba-content-studio-box input[type="text"],
.pba-content-studio-box textarea {
    max-width: 860px;
}
.pba-seo-checklist {
    border: 1px solid #dcdcde;
    border-radius: 8px;
    padding: 12px 14px;
    background: #f6f7f7;
}
.pba-check-row {
    display: inline-block;
    margin: 4px 0;
}

/* Stage 5.1 Centralized Academy Admin Console */
.pba-console-wrap .nav-tab-wrapper {
    margin-top: 18px;
    margin-bottom: 20px;
}
.pba-admin-grid,
.pba-content-grid,
.pba-console-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
    margin-top: 20px;
}
.pba-admin-card,
.pba-admin-panel {
    background: #fff;
    border: 1px solid #dcdcde;
    border-radius: 10px;
    padding: 18px;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}
.pba-admin-card h2,
.pba-admin-panel h2 {
    margin-top: 0;
}
.pba-shortcode-list li {
    margin-bottom: 10px;
}

/* Stage 6: Video lessons, premium courses, and interactive lesson blocks */
.pba-video-lesson,
.pba-course-outline,
.pba-interactive-blocks {
    margin: 2rem 0;
    padding: 1.5rem;
    border: 1px solid #d9e2ec;
    border-radius: 16px;
    background: #ffffff;
}

.pba-video-frame {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: 14px;
    background: #111827;
}

.pba-video-frame iframe {
    display: block;
    width: 100%;
    min-height: 420px;
    border: 0;
}

.pba-course-lessons {
    margin: 0;
    padding-left: 1.25rem;
}

.pba-course-lessons li {
    margin: .75rem 0;
    padding: .75rem 0;
    border-bottom: 1px solid #edf2f7;
}

.pba-course-lessons li span {
    display: inline-block;
    margin-left: .75rem;
    font-size: .875rem;
    color: #64748b;
}

.pba-interactive-block {
    margin: 1rem 0;
    padding: 1rem;
    border-left: 4px solid #1a3a5c;
    border-radius: 10px;
    background: #f8fafc;
}

.pba-interactive-block strong {
    display: block;
    margin-bottom: .35rem;
    color: #1a3a5c;
}

.pba-interactive-question { border-left-color: #0f6e56; }
.pba-interactive-tip { border-left-color: #b7791f; }
.pba-interactive-download { border-left-color: #6b46c1; }

@media (max-width: 700px) {
    .pba-video-frame iframe {
        min-height: 240px;
    }

    .pba-course-lessons li span {
        display: block;
        margin-left: 0;
        margin-top: .35rem;
    }
}

/* Stage 7: Live AI Draft Generation and Admin Polish */
.pba-console-wrap h1 {
    color: #1a3a5c;
    font-weight: 800;
}
.pba-studio-steps .pba-admin-card {
    border-top: 4px solid #0f6e56;
}
.pba-generator-panel {
    border: 1px solid #cbd5e1;
    box-shadow: 0 8px 24px rgba(26, 58, 92, .08);
}
.pba-generator-panel h2 {
    color: #1a3a5c;
}
.pba-form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 14px 18px;
    margin-top: 12px;
}
.pba-generator-form input,
.pba-generator-form select,
.pba-generator-form textarea {
    margin-top: 6px;
}
.pba-generator-form .button-primary {
    min-height: 38px;
    padding-left: 18px;
    padding-right: 18px;
}
.pba-admin-card .button,
.pba-admin-panel .button {
    border-radius: 6px;
}
.pba-console-tabs .nav-tab {
    border-radius: 8px 8px 0 0;
}
@media (max-width: 782px) {
    .pba-form-grid {
        grid-template-columns: 1fr;
    }
    .pba-console-tabs .nav-tab {
        display: block;
        margin-bottom: 4px;
    }
}