/* ===== Timeline Section ===== */
.submission-process {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    background: none;
}

/* Video Background */
.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    overflow: hidden;
}

.video-background video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translateX(-50%) translateY(-50%);
    object-fit: cover;
    opacity: 0.7;
}

/* Container Layout */
.submission-process .container {
    display: flex;
    width: 100%;
    height: 100vh;
    position: relative;
    z-index: 5;
}

/* Progress Bar */
.submission-process .progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 4px;
    background: linear-gradient(90deg, #0056b3, #00a0e9);
    z-index: 1000;
    transition: width 0.3s ease;
}

/* ===== Left Panel ===== */
.left-panel {
    width: 40%;
    padding: 4rem;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    color: #fff;
    z-index: 10;
}

.left-panel .fixed-content-inner {
    max-width: 480px;
    text-align: left;
}

.section-title {
    font-size: 2.6rem;
    margin-bottom: 1.5rem;
    color: #000000;
    font-weight: 700;
    text-align: center;
    line-height: 1.15;
}

.section-subtitle {
    font-size: 1.2rem;
    color: #fff;
    opacity: 0.9;
    line-height: 1.7;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.9), 0 0 20px rgba(0, 0, 0, 0.8);
}

/* ===== Right Panel (Timeline) ===== */
.right-panel {
    width: 60%;
    padding: 4rem 4rem 4rem 2rem;
    overflow-y: auto;
    height: 100vh;
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: #0056b3 transparent;
    -webkit-overflow-scrolling: touch;
}

.right-panel::-webkit-scrollbar {
    width: 8px;
}

.right-panel::-webkit-scrollbar-track {
    background: transparent;
}

.right-panel::-webkit-scrollbar-thumb {
    background-color: #0056b3;
    border-radius: 4px;
}

/* Timeline Styles */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 4px;
    background-color: #0056b3;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.timeline-item {
    padding: 2rem 0;
    position: relative;
    opacity: 0.4;
    transform: translateY(20px);
    transition: all 0.5s ease;
    filter: grayscale(100%);
}

.timeline-item.active {
    opacity: 1;
    transform: translateY(0);
    filter: grayscale(0%);
}

.timeline-item::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    background-color: white;
    border: 4px solid #0056b3;
    border-radius: 50%;
    top: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.timeline-content {
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: calc(50% - 40px);
    position: relative;
    transition: all 0.4s ease;
}

.timeline-item.active .timeline-content {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.timeline-content h3 {
    color: #0056b3;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    font-weight: 600;
}

.timeline-content p {
    color: #333;
    font-size: 1rem;
    line-height: 1.6;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: #0056b3;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    z-index: 3;
    box-shadow: 0 3px 6px rgba(0,0,0,0.2), 0 0 15px rgba(0,86,179,0.3);
}

.timeline-item.active .step-number {
    box-shadow: 0 4px 8px rgba(0,86,179,0.5), 0 0 20px rgba(0,86,179,0.7);
    transform: translateX(-50%) scale(1.1);
}

/* Timeline Item Positioning */
.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: auto;
}

/* ===== Responsive Styles ===== */
@media (max-width: 992px) {
    .submission-process .container {
        flex-direction: column;
        height: auto;
    }
    
    .left-panel, .right-panel {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .left-panel {
        padding: 2rem;
        align-items: flex-start;
        min-height: 30vh;
    }
    
    .right-panel {
        padding: 2rem;
        height: 70vh;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item::after {
        left: 30px;
    }
    
    .timeline-content {
        width: calc(100% - 80px);
        margin-left: 70px !important;
    }
    
    .step-number {
        left: 30px;
    }
    
    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .left-panel {
        min-height: 25vh;
        padding: 1.5rem;
    }
    
    .right-panel {
        height: 75vh;
        padding: 1.5rem;
    }
    
    .timeline-content {
        padding: 1.5rem;
    }
    
    .timeline-content h3 {
        font-size: 1.2rem;
    }
    
    .timeline-content p {
        font-size: 0.95rem;
    }
}