/* ============================================
   INSTRUCTOR PUBLIC PROFILE
   Mirrors course_details content-first layout.
   Shared tokens come from base.css (header/footer parity).
   ============================================ */

:root {
    --primary: var(--primary-color, #0a486f);
    --primary-dark: #073454;
    --primary-light: #0d5a94;
    --accent: #2563eb;
    --accent-soft: #eff6ff;
    --accent-border: #bfdbfe;

    --bg: var(--surface-soft, #f8fafc);
    --border: var(--border-soft, #e7ecf1);

    --radius: var(--radius-md, 14px);

    --transition: 220ms var(--ease-out-quart, cubic-bezier(0.25, 1, 0.5, 1));
    --transition-tactile: 280ms var(--ease-tactile, cubic-bezier(0.34, 1.56, 0.64, 1));

    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 2.5rem;
    --space-8: 3rem;
}

/* ============================================
   PAGE CONTAINER (matches course detail shell)
   ============================================ */
.instructor-profile-container {
    /* Same content width as landing / certificates / course detail */
    margin: 0 auto;
    width: var(--page-width);
    max-width: var(--page-max);
    padding: clamp(1.5rem, 3vw, 2.75rem) 0 clamp(2rem, 4vw, 3.5rem);
    background: var(--surface);
    min-height: calc(100vh - 200px);
    min-height: calc(100dvh - 200px);
}

/* ============================================
   BREADCRUMBS
   ============================================ */
.breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
    color: var(--ink-500);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: var(--space-6);
}

.breadcrumbs a {
    color: var(--ink-600);
    text-decoration: none;
    transition: color var(--transition);
}

.breadcrumbs a:hover {
    color: var(--primary);
    text-decoration: none;
}

.breadcrumbs .separator {
    color: var(--ink-400);
    display: inline-flex;
    align-items: center;
    font-size: 0.75rem;
}

.breadcrumbs > span:last-child {
    color: var(--ink-800);
    font-weight: 500;
}

/* ============================================
   LAYOUT — same proportion as course detail
   ============================================ */
.instructor-profile-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.5rem);
    align-items: start;
    animation: profile-rise 480ms cubic-bezier(0.25, 1, 0.5, 1) both;
}

@keyframes profile-rise {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   LEFT CONTENT (content-first, no heavy card)
   ============================================ */
.instructor-details-panel {
    min-width: 0;
}

.course-provider {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
    padding: 0.3rem 0.85rem 0.3rem 0.3rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--transition), border-color var(--transition);
}

.course-provider:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--accent-border);
}

.provider-logo-small {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    border: 1px solid var(--border-soft);
}

.provider-name-small {
    font-size: 0.82rem;
    color: var(--ink-700);
    font-weight: 700;
    letter-spacing: 0.01em;
}

.instructor-title-large {
    font-family: var(--font-display);
    font-size: clamp(1.75rem, 3.8vw, 2.65rem);
    font-weight: 800;
    color: var(--ink-900);
    line-height: 1.14;
    letter-spacing: -0.03em;
    margin: 0 0 var(--space-5);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.instructor-meta-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
    padding: var(--space-4);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--transition);
    flex-wrap: wrap;
    max-width: 70ch;
}

.instructor-meta-row:hover {
    box-shadow: var(--shadow-sm);
}

.instructor-avatar-lg {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.instructor-avatar-lg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.instructor-avatar-lg-fallback {
    color: #fff;
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.02em;
}

.instructor-meta-copy {
    display: flex;
    flex-direction: column;
    gap: 0.1rem;
    min-width: 0;
}

.instructor-label {
    font-size: 0.75rem;
    color: var(--ink-500);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.instructor-role-title {
    font-size: 0.98rem;
    color: var(--ink-800);
    font-weight: 600;
}

.instructor-description {
    color: var(--ink-600);
    line-height: 1.8;
    font-size: 1.02rem;
    max-width: 70ch;
    margin: 0 0 var(--space-6);
}

.instructor-description.is-empty {
    color: var(--ink-500);
    font-style: italic;
}

.profile-extra-section {
    margin: 0 0 var(--space-6);
    max-width: 70ch;
}

.courses-taught-section {
    max-width: none;
}

.section-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--ink-900);
    margin: 0 0 var(--space-4);
    letter-spacing: -0.015em;
}

.credentials-body {
    color: var(--ink-700);
    line-height: 1.7;
    font-size: 0.98rem;
}

.section-empty {
    margin: 0;
    color: var(--ink-500);
    font-size: 0.95rem;
    line-height: 1.55;
}

/* ============================================
   COURSES TAUGHT (interactive — cards OK)
   ============================================ */
.taught-course-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: var(--space-3);
}

.taught-course-card {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: var(--space-4);
    align-items: stretch;
    padding: var(--space-3);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-xs);
    text-decoration: none;
    color: inherit;
    transition:
        box-shadow var(--transition),
        border-color var(--transition),
        transform var(--transition-tactile);
}

.taught-course-card:hover {
    box-shadow: var(--shadow-sm);
    border-color: var(--accent-border);
    transform: translateY(-2px);
    text-decoration: none;
    color: inherit;
}

.taught-course-card:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.taught-course-thumb {
    width: 88px;
    height: 88px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: linear-gradient(135deg, #eef2f5 0%, #e2e8f0 100%);
    border: 1px solid var(--border-soft);
    position: relative;
}

.taught-course-thumb::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background: linear-gradient(
        110deg,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0.5) 45%,
        rgba(255, 255, 255, 0) 90%
    );
    background-size: 200% 100%;
    animation: course-media-shimmer 1.4s ease-in-out infinite;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.taught-course-thumb:has(img.is-loaded)::after,
.taught-course-thumb:has(.taught-course-thumb-fallback)::after {
    opacity: 0;
    animation: none;
}

.taught-course-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    opacity: 0;
    filter: blur(6px);
    transition: opacity 0.4s ease, filter 0.4s ease;
}

.taught-course-thumb img.is-loaded {
    opacity: 1;
    filter: none;
}

@keyframes course-media-shimmer {
    0% { background-position: 120% 0; }
    100% { background-position: -80% 0; }
}

@media (prefers-reduced-motion: reduce) {
    .taught-course-thumb::after {
        animation: none;
        opacity: 0;
    }
    .taught-course-thumb img {
        opacity: 1;
        filter: none;
        transition: none;
    }
}

.taught-course-thumb-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(145deg, var(--primary), var(--primary-dark));
    color: rgba(255, 255, 255, 0.92);
    font-size: 1.5rem;
}

.taught-course-body {
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.25rem;
}

.taught-course-title {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ink-900);
    letter-spacing: -0.015em;
    line-height: 1.3;
}

.taught-course-card:hover .taught-course-title {
    color: var(--primary);
}

.taught-course-excerpt {
    margin: 0;
    font-size: 0.9rem;
    color: var(--ink-500);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.taught-course-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.2rem;
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--primary);
    transition: gap var(--transition);
}

.taught-course-card:hover .taught-course-cta {
    gap: 0.5rem;
}

.view-more-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin-top: var(--space-4);
    color: var(--primary);
    font-weight: 600;
    font-size: 0.92rem;
    text-decoration: none;
    transition: gap var(--transition), color var(--transition);
}

.view-more-link:hover {
    color: var(--primary-dark);
    gap: 0.55rem;
    text-decoration: none;
}

/* ============================================
   RIGHT SIDE PANEL (matches course side rail)
   ============================================ */
.instructor-side-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    position: sticky;
    top: 6.5rem;
    animation: profile-rise 560ms cubic-bezier(0.25, 1, 0.5, 1) 70ms both;
}

.side-panel-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--space-5);
    transition: box-shadow var(--transition);
}

.side-panel-card:hover {
    box-shadow: var(--shadow-md);
}

.instructor-identity-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-3);
}

.identity-avatar-wrap {
    margin-bottom: var(--space-1);
}

.identity-avatar-img,
.identity-avatar-fallback {
    width: 112px;
    height: 112px;
    border-radius: 50%;
    object-fit: cover;
    display: block;
}

.identity-avatar-img {
    border: 3px solid var(--surface);
    box-shadow: 0 0 0 1px var(--border), var(--shadow-sm);
}

.identity-avatar-fallback {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    box-shadow: var(--shadow-sm);
}

.identity-name {
    margin: 0;
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--ink-900);
    letter-spacing: -0.02em;
    line-height: 1.25;
}

.identity-title {
    margin: 0;
    font-size: 0.88rem;
    color: var(--ink-500);
    font-weight: 500;
}

.identity-stat-row {
    width: 100%;
    margin-top: var(--space-1);
}

.identity-stat {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    width: 100%;
    padding: var(--space-3);
    background: var(--surface-soft);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
}

.identity-stat-value {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.identity-stat-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ink-500);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* CTA mirrors btn-enroll-large from course details */
.btn-browse-certificates {
    width: 100%;
    margin-top: var(--space-2);
    padding: 1rem 1.25rem;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    font-size: 1.02rem;
    font-weight: 700;
    text-decoration: none;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.15rem;
    text-align: center;
    letter-spacing: 0.01em;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-tactile), box-shadow var(--transition), background var(--transition);
}

.btn-browse-certificates:hover {
    background: linear-gradient(135deg, var(--primary-dark), #052539);
    border-color: var(--primary-dark);
    color: #fff;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-browse-certificates .btn-subtext {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    margin-top: 0.15rem;
    opacity: 0.9;
}

.instructor-courses-side-card .section-title {
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-soft);
}

.side-course-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.side-course-link {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: var(--space-3);
    align-items: center;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    text-decoration: none;
    color: inherit;
    transition: background var(--transition), border-color var(--transition);
}

.side-course-link:hover {
    background: var(--accent-soft);
    border-color: var(--accent-border);
    text-decoration: none;
    color: inherit;
}

.side-course-pos {
    width: 1.6rem;
    height: 1.6rem;
    border-radius: 999px;
    background: var(--accent-soft);
    border: 1px solid var(--accent-border);
    color: var(--primary);
    font-size: 0.72rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.side-course-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink-800);
    line-height: 1.35;
}

.side-course-link:hover .side-course-title {
    color: var(--primary);
}

.side-course-more {
    margin: var(--space-3) 0 0;
    font-size: 0.82rem;
    color: var(--ink-500);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1199px) {
    .instructor-profile-layout {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .instructor-side-panel {
        position: static;
        max-width: 420px;
    }
}

@media (max-width: 767px) {
    .instructor-profile-container {
        padding: 1.25rem 0 2.5rem;
    }

    .instructor-title-large {
        font-size: clamp(1.5rem, 7vw, 2rem);
    }

    .instructor-meta-row {
        padding: var(--space-3);
    }

    .taught-course-card {
        grid-template-columns: 64px minmax(0, 1fr);
        gap: var(--space-3);
    }

    .taught-course-thumb {
        width: 64px;
        height: 64px;
    }

    .taught-course-excerpt {
        -webkit-line-clamp: 1;
    }

    .instructor-side-panel {
        max-width: none;
    }
}

@media (prefers-reduced-motion: reduce) {
    .instructor-profile-layout,
    .instructor-side-panel,
    .taught-course-card,
    .btn-browse-certificates,
    .view-more-link,
    .taught-course-cta {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
}