/* ═══════════════════════════════════════════════════════════
   Founder — premium portrait & trust sections
   ═══════════════════════════════════════════════════════════ */

.sit-founder-photo {
    display: block;
    width: 100%;
    height: 100%;
}

.sit-founder-photo img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center center;
}

/* ── Full founder section ── */
.sit-founder {
    padding: var(--space-16) 0;
    position: relative;
    overflow: hidden;
}

.sit-founder--home {
    border-block: 1px solid var(--border-subtle);
    background:
        radial-gradient(ellipse 80% 60% at 0% 50%, rgba(59, 130, 246, 0.08), transparent 55%),
        var(--bg-base);
}

.sit-founder--about {
    background: var(--bg-elevated);
}

.sit-founder__location {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: calc(var(--space-2) * -1) 0 var(--space-6);
}

.sit-founder__intro {
    display: grid;
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

.sit-founder__intro p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.75;
    margin: 0;
    max-width: 60ch;
}

/* ── Home Founder Spotlight (compact) ── */
.sit-founder-spotlight {
    padding: var(--space-12) 0;
    background:
        radial-gradient(ellipse 70% 80% at 100% 50%, rgba(59, 130, 246, 0.07), transparent 50%),
        var(--bg-base);
}

.sit-founder-spotlight__inner {
    display: flex;
    align-items: center;
    gap: clamp(var(--space-6), 4vw, var(--space-10));
    flex-wrap: wrap;
}

.sit-founder-spotlight__photo {
    flex-shrink: 0;
}

.sit-founder-spotlight__frame {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-default);
    overflow: hidden;
    background: linear-gradient(160deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
    padding: var(--space-1);
    box-shadow: 0 12px 32px -8px rgba(0, 0, 0, 0.45);
}

.sit-founder-spotlight__content {
    flex: 1;
    min-width: min(100%, 280px);
}

.sit-founder-spotlight__name {
    font-family: var(--font-display);
    font-size: var(--text-2xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin: var(--space-3) 0 var(--space-1);
}

.sit-founder-spotlight__role {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: 0 0 var(--space-3);
}

.sit-founder-spotlight__intro {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--accent-cyan);
    margin: 0 0 var(--space-3);
    max-width: 48ch;
}

.sit-founder-spotlight__message {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0 0 var(--space-6);
    max-width: 56ch;
}

.sit-founder-spotlight__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
}

/* ── Personal Commitment ── */
.sit-founder-commitment {
    padding: var(--space-16) 0;
}

.sit-founder-commitment__inner {
    max-width: 720px;
    margin: 0 auto;
}

.sit-founder-commitment__header {
    margin-bottom: var(--space-10);
}

.sit-section-title--center {
    text-align: center;
}

.sit-founder-commitment__letter {
    margin: 0;
    padding: 0;
    border: none;
}

.sit-founder-commitment__letter p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.8;
    margin: 0 0 var(--space-5);
}

.sit-founder-commitment__letter p:last-child {
    margin-bottom: 0;
}

.sit-founder-commitment__signature {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-10) 0 var(--space-8);
    padding-top: var(--space-8);
    border-top: 1px solid var(--border-subtle);
}

.sit-founder-commitment__sign-photo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-default);
    overflow: hidden;
    flex-shrink: 0;
}

.sit-founder-commitment__sign-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-lg);
    margin: 0 0 var(--space-1);
    color: var(--text-primary);
}

.sit-founder-commitment__sign-role {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin: 0;
}

.sit-founder-commitment__cta {
    display: flex;
    justify-content: center;
}

/* ── LinkedIn link ── */
.sit-linkedin-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    text-decoration: none;
    transition: all var(--duration-base);
}

.sit-linkedin-link--button {
    padding: 0.625rem 1.25rem;
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-glass);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
}

.sit-linkedin-link--button:hover {
    background: var(--bg-glass-strong);
    border-color: rgba(10, 102, 194, 0.5);
    color: #60a5fa;
}

.sit-linkedin-link.sit-btn {
    display: inline-flex;
}

.sit-linkedin-link--icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-subtle);
    background: var(--bg-surface);
    color: var(--text-muted);
}

.sit-linkedin-link--icon:hover {
    color: #60a5fa;
    border-color: rgba(10, 102, 194, 0.4);
    background: var(--bg-surface-hover);
}

.sit-footer__social {
    margin-top: var(--space-4);
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Contact founder block ── */
.sit-contact-founder {
    max-width: 640px;
}

.sit-founder-card {
    display: flex;
    align-items: center;
    gap: var(--space-6);
    padding: var(--space-6) var(--space-8);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.08), var(--bg-surface));
}

.sit-founder-card__heading {
    font-size: var(--text-lg);
    font-weight: 700;
    margin: 0 0 var(--space-2);
}

.sit-founder-card__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.sit-founder-card__photo {
    width: 96px;
    height: 96px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-default);
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(160deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
}

.sit-founder-card__desc {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0;
}

.sit-founder__layout {
    display: grid;
    grid-template-columns: minmax(260px, 400px) minmax(0, 1fr);
    gap: clamp(var(--space-8), 5vw, var(--space-16));
    align-items: start;
}

.sit-founder__portrait-wrap {
    position: sticky;
    top: calc(var(--nav-height, 72px) + var(--space-6));
}

.sit-founder__portrait-frame {
    position: relative;
    border-radius: var(--radius-2xl);
    border: 1px solid var(--border-default);
    background: linear-gradient(160deg, rgba(30, 41, 59, 0.9), rgba(15, 23, 42, 0.95));
    padding: var(--space-3);
    overflow: hidden;
    aspect-ratio: 1;
    box-shadow:
        0 0 0 1px rgba(255, 255, 255, 0.04) inset,
        0 24px 48px -12px rgba(0, 0, 0, 0.5);
}

.sit-founder__portrait-glow {
    position: absolute;
    inset: -20%;
    background: radial-gradient(circle at 50% 30%, rgba(96, 165, 250, 0.15), transparent 55%);
    pointer-events: none;
    z-index: 0;
}

.sit-founder__portrait {
    position: relative;
    z-index: 1;
    width: 100%;
    height: 100%;
    border-radius: calc(var(--radius-2xl) - var(--space-2));
    overflow: hidden;
}

.sit-founder__portrait img {
    border-radius: inherit;
}

.sit-founder__meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin: var(--space-6) 0 0;
    padding: 0;
    list-style: none;
}

.sit-founder__meta li {
    font-size: var(--text-xs);
    color: var(--text-muted);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    background: var(--bg-surface);
}

.sit-founder__meta li span {
    color: var(--text-secondary);
    font-weight: 600;
    margin-right: 0.35em;
}

.sit-founder__title {
    font-family: var(--font-display);
    font-size: clamp(var(--text-3xl), 4vw, var(--text-4xl));
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin: var(--space-4) 0 var(--space-5);
}

.sit-founder__role {
    display: block;
    font-size: clamp(var(--text-base), 2vw, var(--text-lg));
    font-weight: 500;
    color: var(--text-muted);
    margin-top: var(--space-2);
    letter-spacing: 0;
}

.sit-founder__lead {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 var(--space-8);
    max-width: 58ch;
}

.sit-founder__blocks {
    display: grid;
    gap: var(--space-6);
    margin-bottom: var(--space-8);
}

.sit-founder--about .sit-founder__blocks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-5);
}

.sit-founder__block {
    padding: var(--space-5) var(--space-6);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    background: var(--bg-surface);
    transition: border-color var(--duration-base);
}

.sit-founder__block:hover {
    border-color: var(--border-default);
}

.sit-founder__block-title {
    font-size: var(--text-sm);
    font-weight: 700;
    color: var(--accent-cyan);
    margin: 0 0 var(--space-3);
    letter-spacing: 0.01em;
}

.sit-founder__block p {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.65;
    margin: 0;
}

.sit-founder__trust {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2) var(--space-4);
    margin: 0 0 var(--space-8);
    padding: 0;
    list-style: none;
}

.sit-founder__trust li {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.sit-founder__trust li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-cyan);
    flex-shrink: 0;
}

.sit-founder__actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
}

/* ── Founder strip (compact) ── */
.sit-founder-strip__photo {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-default);
    overflow: hidden;
    flex-shrink: 0;
    background: var(--bg-surface);
}

/* ── CTA founder accent ── */
.sit-cta-founder {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.sit-cta-founder__photo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.12);
    overflow: hidden;
    flex-shrink: 0;
}

.sit-cta-founder__text {
    text-align: left;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    line-height: 1.45;
    margin: 0;
}

.sit-cta-founder__text strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* ── Responsive ── */
@media (max-width: 960px) {
    .sit-founder__layout {
        grid-template-columns: 1fr;
    }

    .sit-founder__portrait-wrap {
        position: static;
        max-width: 360px;
        margin: 0 auto;
    }

    .sit-founder--about .sit-founder__blocks {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sit-founder {
        padding: var(--space-12) 0;
    }

    .sit-founder__actions {
        flex-direction: column;
    }

    .sit-founder__actions .sit-btn {
        width: 100%;
        justify-content: center;
    }

    .sit-founder-card {
        flex-direction: column;
        text-align: center;
    }

    .sit-founder-card__actions {
        justify-content: center;
    }

    .sit-founder-spotlight__actions {
        flex-direction: column;
    }

    .sit-founder-spotlight__actions .sit-btn,
    .sit-founder-spotlight__actions .sit-linkedin-link {
        width: 100%;
    }
}