/* Radial Orbital Timeline Styles - Horizontal Layout */
.radial-orbital-timeline {
    position: relative;
    width: 100%;
    height: 350px;
    background: transparent;
    border-radius: 20px;
    overflow: visible;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 2rem 0;
}

.timeline-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-orbit {
    position: absolute;
    width: 90%;
    height: 140px;
    border: 2px solid rgba(59, 130, 246, 0.2);
    border-radius: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 3rem;
    background: rgba(255, 255, 255, 0.05);
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.timeline-center {
    display: none;
}

.timeline-center::before {
    content: '';
    position: absolute;
    width: 70px;
    height: 70px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
}

.timeline-center::after {
    content: '';
    position: absolute;
    width: 90px;
    height: 90px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    animation: ping 2s cubic-bezier(0, 0, 0.2, 1) infinite;
    animation-delay: 0.5s;
}

.timeline-node {
    position: absolute;
    width: 60px;
    height: 60px;
    background: rgba(59, 130, 246, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    transform-origin: center;
    z-index: 20;
}

.timeline-node:hover {
    transform: scale(1.2);
    border-color: rgba(59, 130, 246, 1);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.6);
    background: rgba(59, 130, 246, 1);
}

.timeline-node.active {
    background: rgba(59, 130, 246, 1);
    border-color: #3b82f6;
    transform: scale(1.3);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.8);
    z-index: 30;
}

.timeline-node.related {
    border-color: rgba(139, 92, 246, 0.8);
    animation: pulse 1s ease-in-out infinite;
}

.timeline-node-icon {
    width: 24px;
    height: 24px;
    fill: white;
}

.timeline-node-label {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.75rem;
    font-weight: 600;
    color: #1e293b;
    background: rgba(255, 255, 255, 0.9);
    padding: 4px 8px;
    border-radius: 12px;
    border: 1px solid rgba(59, 130, 246, 0.2);
    white-space: nowrap;
    pointer-events: none;
    z-index: 25;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.timeline-node-card {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) scale(0);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 2px solid rgba(59, 130, 246, 0.3);
    border-radius: 16px;
    padding: 1.5rem;
    width: 320px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
    z-index: 100;
    margin-bottom: 1rem;
}

.timeline-node.active .timeline-node-card {
    transform: translateX(-50%) scale(1);
    opacity: 1;
    pointer-events: auto;
}

.timeline-node-card::before {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 8px;
    background: rgba(59, 130, 246, 0.3);
}

.timeline-node-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.timeline-node-card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e40af;
    margin: 0;
}

.timeline-node-card-content {
    color: #4b5563;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

@keyframes rotate {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes ping {
    75%, 100% {
        transform: scale(2);
        opacity: 0;
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .radial-orbital-timeline {
        height: 400px;
    }
    
    .timeline-orbit {
        width: 95%;
        height: 120px;
        border-radius: 60px;
        padding: 0 2rem;
        flex-direction: row;
        justify-content: space-between;
    }
    
    .timeline-node {
        width: 50px;
        height: 50px;
    }
    
    .timeline-node-label {
        font-size: 0.7rem;
        padding: 3px 6px;
        bottom: -20px;
    }
    
    .timeline-node-card {
        width: 280px;
        padding: 1rem;
    }
    
    .timeline-node-card-title {
        font-size: 1rem;
    }
    
    .timeline-node-card-content {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .radial-orbital-timeline {
        height: 450px;
    }
    
    .timeline-orbit {
        width: 90%;
        height: 100px;
        border-radius: 50px;
        padding: 0 1rem;
    }
    
    .timeline-node {
        width: 45px;
        height: 45px;
    }
    
    .timeline-node-label {
        font-size: 0.65rem;
        padding: 2px 5px;
        bottom: -18px;
    }
    
    .timeline-node-card {
        width: 250px;
        padding: 0.75rem;
    }
    
    .timeline-node-icon {
        width: 20px;
        height: 20px;
    }
}

/* Mobile responsive styles for practice timeline section */
@media (max-width: 768px) {
    .section_practice-timeline {
        padding: 2rem 0 !important;
    }
    
    .section_practice-timeline .container-default {
        padding: 0 1rem;
    }
    
    .section_practice-timeline h3 {
        font-size: 1.8rem !important;
        margin-bottom: 1.5rem !important;
    }
    
    .section_practice-timeline p {
        font-size: 1rem !important;
        margin-bottom: 2rem !important;
    }
    
    .section_practice-timeline .margin-bottom {
        margin-bottom: 2rem !important;
    }
    
    .section_practice-timeline .radial-orbital-timeline {
        margin: 1rem auto;
    }
    
    .section_practice-timeline .button {
        font-size: 1rem !important;
        padding: 0.875rem 1.5rem !important;
        margin-top: 1.5rem !important;
    }
}

@media (max-width: 480px) {
    .section_practice-timeline {
        padding: 1.5rem 0 !important;
    }
    
    .section_practice-timeline h3 {
        font-size: 1.5rem !important;
        margin-bottom: 1rem !important;
    }
    
    .section_practice-timeline p {
        font-size: 0.9rem !important;
        margin-bottom: 1.5rem !important;
        line-height: 1.5 !important;
    }
    
    .section_practice-timeline .margin-bottom {
        margin-bottom: 1.5rem !important;
    }
    
    .section_practice-timeline .radial-orbital-timeline {
        margin: 0.75rem auto;
    }
    
    .section_practice-timeline .button {
        font-size: 0.9rem !important;
        padding: 0.75rem 1.25rem !important;
        margin-top: 1rem !important;
    }
    
    .section_practice-timeline .margin-top {
        margin-top: 1rem !important;
    }
    
    /* 2x2 Grid Layout Support */
    .timeline-orbit {
        display: none !important; /* Hide horizontal orbit on mobile */
    }
    
    .timeline-node {
        position: absolute !important;
        transform: translate(-50%, -50%) !important;
    }
    
    .timeline-node-label {
        position: absolute !important;
        bottom: -20px !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        font-size: 0.6rem !important;
        white-space: nowrap !important;
    }
    
    /* Downward content display for Listening and Writing nodes */
    .timeline-node[data-id="1"] .timeline-node-card,
    .timeline-node[data-id="4"] .timeline-node-card {
        position: absolute !important;
        top: 100% !important;
        bottom: auto !important;
        left: 50% !important;
        transform: translateX(-50%) scale(0) !important;
        width: 85vw !important;
        max-width: 300px !important;
        margin-top: 1rem !important;
        margin-bottom: 0 !important;
        z-index: 1000 !important;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2) !important;
        border: 2px solid rgba(59, 130, 246, 0.4) !important;
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.95)) !important;
        animation: slideDownFade 0.3s ease-out !important;
    }
    
    .timeline-node[data-id="1"].active .timeline-node-card,
    .timeline-node[data-id="4"].active .timeline-node-card {
        transform: translateX(-50%) scale(1) !important;
        opacity: 1 !important;
        pointer-events: auto !important;
    }
    
    .timeline-node[data-id="1"] .timeline-node-card::before,
    .timeline-node[data-id="4"] .timeline-node-card::before {
        content: '' !important;
        position: absolute !important;
        top: -8px !important;
        bottom: auto !important;
        left: 50% !important;
        transform: translateX(-50%) !important;
        width: 2px !important;
        height: 8px !important;
        background: rgba(59, 130, 246, 0.4) !important;
    }
    
    .timeline-node[data-id="1"] .timeline-node-card-title,
    .timeline-node[data-id="4"] .timeline-node-card-title {
        font-size: 1.1rem !important;
        color: #1e40af !important;
        text-align: left !important;
        margin-bottom: 0.75rem !important;
        font-weight: 700 !important;
    }
    
    .timeline-node[data-id="1"] .timeline-node-card-content,
    .timeline-node[data-id="4"] .timeline-node-card-content {
        font-size: 0.9rem !important;
        line-height: 1.5 !important;
        text-align: left !important;
        color: #4b5563 !important;
        margin: 0 !important;
    }
    
    @keyframes slideDownFade {
        from {
            opacity: 0;
            transform: translateX(-50%) translateY(-10px) scale(0.9);
        }
        to {
            opacity: 1;
            transform: translateX(-50%) translateY(0) scale(1);
        }
    }
}

/* Enhanced Animations */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(-50%, -50%) translateY(0px);
    }
    50% {
        transform: translate(-50%, -50%) translateY(-8px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
    }
    50% {
        box-shadow: 0 4px 30px rgba(59, 130, 246, 0.6), 0 0 20px rgba(59, 130, 246, 0.4);
    }
}

@keyframes slideInUp {
    from {
        transform: translate(-50%, -50%) translateY(20px);
        opacity: 0;
    }
    to {
        transform: translate(-50%, -50%) translateY(0);
        opacity: 1;
    }
}

@keyframes bounceIn {
    0% {
        transform: translate(-50%, -50%) scale(0.3);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.05);
        opacity: 1;
    }
    70% {
        transform: translate(-50%, -50%) scale(0.9);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
    }
}

/* Enhanced Node States */
.timeline-node.highlighted {
    animation: glow 1s ease-in-out infinite;
    z-index: 100;
}

.timeline-node.active {
    animation: bounceIn 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.timeline-node:hover {
    z-index: 50;
}

/* Enhanced Card Animations */
.timeline-node-card {
    animation: slideInUp 0.4s ease-out;
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.timeline-node-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
    border-radius: 12px;
    pointer-events: none;
}

/* Enhanced Label Animations */
.timeline-node-label {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-node.active .timeline-node-label {
    animation: pulse 1s ease-in-out infinite;
}

/* Connection Line Animations */
.timeline-connection-line {
    transition: all 0.3s ease;
}

.timeline-connection-line.active {
    stroke-dasharray: 5, 5;
    animation: dash 1s linear infinite;
}

@keyframes dash {
    to {
        stroke-dashoffset: -10;
    }
}

/* Loading State */
.timeline-container.loading .timeline-node {
    opacity: 0.3;
    animation: pulse 1.5s ease-in-out infinite;
}

/* Focus States */
.timeline-node:focus {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

.timeline-node:focus-visible {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}