/* ============================
       SESSIONS SECTION - CLEAN & SIMPLE
       =============================*/
.sessions-section {
    padding: 120px 20px;
    background: linear-gradient(180deg, #F8F5F1 0%, #E7E0D8 100%);
    position: relative;
    overflow: hidden;
}

/* Subtle background pattern */
.sessions-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(108, 122, 137, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(15, 18, 42, 0.02) 0%, transparent 50%);
    pointer-events: none;
}

.sessions-container {
    max-width: 1500px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.sessions-header {
    text-align: center;
    margin-bottom: 80px;
}

.sessions-header h2 {
    font-size: 4rem;
    font-weight: 900;
    background: linear-gradient(135deg, #0F122A 0%, #4A5568 50%, #6c7a89 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 25px;
    letter-spacing: -0.02em;
}

.sessions-header p {
    max-width: 750px;
    margin: 0 auto;
    font-size: 1.15rem;
    color: #4A5568;
    line-height: 1.8;
    font-weight: 500;
}

/* ============================
       SESSIONS GRID
       =============================*/
.sessions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 35px;
}

@media (max-width: 1300px) {
    .sessions-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .sessions-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

@media (max-width: 600px) {
    .sessions-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

/* ============================
       SESSION CARD - SIMPLE
       =============================*/
.session-card {
    position: relative;
    background: #FFFFFF;
    border-radius: 20px;
    padding: 35px;
    cursor: pointer;
    box-shadow: 
        0 4px 20px rgba(15, 18, 42, 0.06),
        0 1px 3px rgba(15, 18, 42, 0.04);
    transition: all 0.3s ease;
    border: 1px solid rgba(108, 122, 137, 0.08);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.session-card:hover {
    transform: translateY(-8px);
    box-shadow: 
        0 20px 40px rgba(15, 18, 42, 0.12),
        0 8px 16px rgba(15, 18, 42, 0.08);
    border-color: rgba(108, 122, 137, 0.15);
}

.session-card:active {
    transform: translateY(-6px);
}

/* Session Card Content */
.session-content {
    text-align: center;
    width: 100%;
}

.session-title {
    font-size: 1.7rem;
    font-weight: 800;
    color: #0F122A;
    margin-bottom: 18px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    transition: color 0.3s ease;
}

.session-card:hover .session-title {
    color: #4A5568;
}

.session-description {
    font-size: 1rem;
    color: #6C7A89;
    line-height: 1.7;
    font-weight: 400;
    transition: color 0.3s ease;
}

.session-card:hover .session-description {
    color: #4A5568;
}

/* ============================
       SESSION MODALS
       =============================*/
.session-modal {
    position: fixed;
    inset: 0;
    background: rgba(15, 18, 42, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.session-modal.show {
    display: flex;
}

.session-modal-content {
    background: #FFFFFF;
    border-radius: 24px;
    padding: 50px;
    max-width: 700px;
    width: 100%;
    position: relative;
    box-shadow: 
        0 40px 80px rgba(15, 18, 42, 0.3),
        0 10px 30px rgba(15, 18, 42, 0.2);
    border: 1px solid rgba(108, 122, 137, 0.1);
    max-height: 90vh;
    overflow-y: auto;
}

/* Custom scrollbar */
.session-modal-content::-webkit-scrollbar {
    width: 8px;
}

.session-modal-content::-webkit-scrollbar-track {
    background: #F8F5F1;
    border-radius: 10px;
}

.session-modal-content::-webkit-scrollbar-thumb {
    background: #6C7A89;
    border-radius: 10px;
}

.session-modal-content::-webkit-scrollbar-thumb:hover {
    background: #4A5568;
}

.session-modal-close {
    position: absolute;
    top: 25px;
    right: 25px;
    background: rgba(108, 122, 137, 0.1);
    border: none;
    font-size: 1.8rem;
    color: #6C7A89;
    cursor: pointer;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
    font-weight: 300;
}

.session-modal-close:hover {
    background: #0F122A;
    color: #FFFFFF;
    transform: rotate(90deg);
}

.session-modal-header {
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 2px solid rgba(108, 122, 137, 0.1);
}

.session-modal-header h2 {
    font-size: 2.3rem;
    color: #0F122A;
    margin: 0;
    font-weight: 900;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.session-modal-body {
    margin-bottom: 35px;
}

.session-modal-body p {
    font-size: 1.05rem;
    color: #2D3748;
    line-height: 1.9;
    margin-bottom: 20px;
    font-weight: 400;
}

.session-modal-body p strong {
    color: #0F122A;
    font-weight: 800;
}

.session-modal-body ul {
    list-style: none;
    padding: 0;
    margin: 20px 0 0 0;
    background: #F8F5F1;
    border-radius: 12px;
    padding: 20px;
}

.session-modal-body li {
    font-size: 1rem;
    color: #2D3748;
    line-height: 1.9;
    padding-left: 30px;
    position: relative;
    margin-bottom: 12px;
    font-weight: 400;
    transition: all 0.2s ease;
}

.session-modal-body li:last-child {
    margin-bottom: 0;
}

.session-modal-body li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: #6C7A89;
    font-weight: 800;
    font-size: 1.2rem;
}

.session-modal-body li:hover {
    padding-left: 35px;
    color: #0F122A;
}

.session-modal-body li:hover:before {
    color: #0F122A;
}

/* ============================
       SESSION MODAL FOOTER
       =============================*/
.session-modal-footer {
    border-top: 2px solid rgba(108, 122, 137, 0.1);
    padding-top: 30px;
    background: linear-gradient(135deg, rgba(248, 245, 241, 0.5) 0%, rgba(231, 224, 216, 0.3) 100%);
    margin: 0 -50px -50px -50px;
    padding: 30px 50px;
    border-radius: 0 0 24px 24px;
}

.session-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 25px;
}

.session-duration,
.session-speaker {
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    border-radius: 10px;
    transition: all 0.2s ease;
}

.session-duration {
    color: #6C7A89;
    background: rgba(108, 122, 137, 0.1);
}

.session-duration:hover {
    background: rgba(108, 122, 137, 0.15);
}

.session-speaker {
    color: #0F122A;
    background: rgba(15, 18, 42, 0.08);
}

.session-speaker:hover {
    background: rgba(15, 18, 42, 0.12);
}

/* ============================
       RESPONSIVE ADJUSTMENTS
       =============================*/
@media (max-width: 768px) {
    .sessions-section {
        padding: 80px 15px;
    }

    .sessions-header {
        margin-bottom: 60px;
    }

    .sessions-header h2 {
        font-size: 3rem;
    }

    .sessions-header p {
        font-size: 1rem;
    }

    .session-card {
        padding: 25px;
        min-height: 240px;
    }

    .session-title {
        font-size: 1.4rem;
    }

    .session-description {
        font-size: 0.95rem;
    }

    .session-modal-content {
        padding: 35px;
        max-width: 95%;
    }

    .session-modal-header h2 {
        font-size: 1.8rem;
    }

    .session-modal-body p {
        font-size: 0.95rem;
    }

    .session-modal-footer {
        margin: 0 -35px -35px -35px;
        padding: 25px 35px;
    }

    .session-info {
        flex-direction: column;
        align-items: flex-start;
    }

    .session-duration,
    .session-speaker {
        width: 100%;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .sessions-section {
        padding: 60px 15px;
    }

    .sessions-header h2 {
        font-size: 2.2rem;
    }

    .sessions-header p {
        font-size: 0.95rem;
    }

    .session-card {
        padding: 20px;
        min-height: 200px;
        border-radius: 16px;
    }

    .session-title {
        font-size: 1.2rem;
    }

    .session-description {
        font-size: 0.9rem;
    }

    .session-modal-content {
        padding: 25px;
        border-radius: 20px;
    }

    .session-modal-close {
        width: 40px;
        height: 40px;
        font-size: 1.5rem;
        top: 20px;
        right: 20px;
    }

    .session-modal-header {
        margin-bottom: 25px;
        padding-bottom: 20px;
    }

    .session-modal-header h2 {
        font-size: 1.5rem;
    }

    .session-modal-body p,
    .session-modal-body li {
        font-size: 0.95rem;
    }

    .session-modal-footer {
        margin: 0 -25px -25px -25px;
        padding: 20px 25px;
    }

    .session-duration,
    .session-speaker {
        font-size: 0.9rem;
        padding: 10px 16px;
    }
}

/* ============================
       ACCESSIBILITY
       =============================*/
.session-card:focus-visible {
    outline: 3px solid #6C7A89;
    outline-offset: 4px;
}

.session-modal-close:focus-visible {
    outline: 3px solid #6C7A89;
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .session-card,
    .session-modal,
    .session-modal-content {
        transition: none !important;
    }
    
    .session-card:hover {
        transform: none;
    }
}

/* Print styles */
@media print {
    .session-modal {
        display: none !important;
    }
    
    .session-card {
        break-inside: avoid;
    }
}