:root {
    --color-primary: #0A2540;
    --color-secondary: #1A73E8;
    --color-accent: #00A67E;
    --color-linkedin: #0A66C2;
    --color-surface: #F8FAFB;
    --color-surface-elevated: #FFFFFF;
    --color-text: #1A1A2E;
    --color-text-muted: #5C6B7A;
    --color-border: #E2E8F0;
    --font-display: 'Fraunces', serif;
    --font-body: 'DM Sans', sans-serif;
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --shadow-md: 0 4px 20px rgba(10, 37, 64, 0.08);
    --transition: 0.3s ease;
}
.professors-section {
    padding: 60px 0;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 24px;
}
.professors-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}
.professors-header-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, rgba(26,115,232,0.1), rgba(0,166,126,0.1));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}
.professors-header-icon svg {
    width: 22px;
    height: 22px;
    fill: var(--color-secondary);
}
.professors-title {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 600;
    color: var(--color-primary);
}
.professors-description {
    font-size: 15px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
}

.professors-timeline {
    position: relative;
}
.professors-timeline::before {
    content: '';
    position: absolute;
    left: 23px;
    top: 24px;
    bottom: 24px;
    width: 2px;
    background: linear-gradient(180deg, var(--color-secondary), var(--color-accent));
    border-radius: 2px;
}

.session-item {
    display: flex;
    gap: 24px;
    position: relative;
}
.session-date {
    width: 48px;
    flex-shrink: 0;
    padding-top: 8px;
}
.session-date-marker {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: white;
    position: relative;
    z-index: 2;
    box-shadow: 0 4px 12px rgba(26,115,232,0.3);
}
.session-date-day {
    font-size: 16px;
    font-weight: 700;
    line-height: 1;
}
.session-date-month {
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
    opacity: 0.9;
}
.session-content {
    flex: 1;
    padding-bottom: 32px;
}
.session-card {
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}
.session-card:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.session-type {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 12px;
    background: rgba(26,115,232,0.08);
    border-radius: 100px;
    font-size: 11px;
    font-weight: 600;
    color: var(--color-secondary);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 16px;
}
.session-type.mesa {
    background: rgba(0,166,126,0.08);
    color: var(--color-accent);
}
.session-type.panel {
    background: rgba(124,58,237,0.08);
    color: #7C3AED;
}
.session-type.pending {
    background: rgba(245,158,11,0.08);
    color: #D97706;
}
.session-type svg {
    width: 12px;
    height: 12px;
    fill: currentColor;
}

.professors-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.professor-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
}
.professor-card:hover {
    background: rgba(26,115,232,0.04);
    transform: translateX(4px);
}
.professor-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    flex-shrink: 0;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-accent));
    display: flex;
    align-items: center;
    justify-content: center;
}
.professor-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.professor-avatar svg {
    width: 28px;
    height: 28px;
    fill: white;
}
.professor-info {
    flex: 1;
    min-width: 0;
}
.professor-name {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 2px;
}
.professor-role {
    font-size: 13px;
    color: var(--color-text-muted);
    line-height: 1.4;
}
.professor-org {
    font-size: 12px;
    color: var(--color-secondary);
    font-weight: 500;
    margin-top: 4px;
}
.professor-linkedin {
    width: 36px;
    height: 36px;
    background: var(--color-surface-elevated);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
}
.professor-card:hover .professor-linkedin {
    background: var(--color-linkedin);
    border-color: var(--color-linkedin);
}
.professor-linkedin svg {
    width: 18px;
    height: 18px;
    fill: var(--color-linkedin);
    transition: var(--transition);
}
.professor-card:hover .professor-linkedin svg {
    fill: white;
}

.professors-multi {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.professors-multi .professor-card {
    flex-direction: column;
    text-align: center;
    padding: 20px 16px;
    position: relative;
}
.professors-multi .professor-info {
    text-align: center;
}
.professors-multi .professor-linkedin {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 32px;
    height: 32px;
}

.session-pending {
    opacity: 0.7;
}
.session-pending .session-date-marker {
    background: linear-gradient(135deg, #94A3B8, #64748B);
    box-shadow: 0 4px 12px rgba(100,116,139,0.3);
}
.session-pending .session-card {
    border-style: dashed;
}
.pending-text {
    font-size: 14px;
    color: var(--color-text-muted);
    font-style: italic;
    padding: 8px 0;
}

@media (max-width: 768px) {
    .professors-timeline::before {
        left: 19px;
    }
    .session-date {
        width: 40px;
    }
    .session-date-marker {
        width: 40px;
        height: 40px;
    }
    .session-date-day {
        font-size: 14px;
    }
    .professors-multi {
        grid-template-columns: 1fr;
    }
}