/* Timeline Component */
:root {
    /* Base Timeline Variables */
    --csd-timeline-position: relative;
    --csd-timeline-padding: 2rem 0;
    
    /* Timeline Line Variables */
    --csd-timeline-line-width: 2px;
    --csd-timeline-line-color: var(--bc-card);
    
    /* Timeline Item Variables */
    --csd-timeline-item-width: 50%;
    --csd-timeline-item-margin-bottom: 2rem;
    --csd-timeline-item-padding-right: 2rem;
    --csd-timeline-item-padding-left: 0;
    
    /* Timeline Point Variables */
    --csd-timeline-point-size: 1rem;
    --csd-timeline-point-position: -0.5rem;
    --csd-timeline-point-top: 1rem;
    --csd-timeline-point-bg: var(--primary-color);
    --csd-timeline-point-border: 2px solid var(--bg-light);
    --csd-timeline-point-border-radius: 50%;
    
    /* Timeline Date Variables */
    --csd-timeline-date-position: 3rem;
    --csd-timeline-date-top: 1rem;
    --csd-timeline-date-color: var(--text-muted);
    --csd-timeline-date-font-size: 0.875rem;
    
    /* Timeline Content Variables */
    --csd-timeline-content-bg: var(--bg-light);
    --csd-timeline-content-border: 1px solid var(--bc-card);
    --csd-timeline-content-border-radius: var(--br-card);
    --csd-timeline-content-padding: 1rem;
    
    /* Timeline Content Typography */
    --csd-timeline-title-margin: 0 0 0.5rem;
    --csd-timeline-title-font-size: 1rem;
    --csd-timeline-title-font-weight: 600;
    --csd-timeline-text-margin: 0;
    --csd-timeline-text-color: var(--text-muted);
    --csd-timeline-text-font-size: 0.875rem;
    
    /* Horizontal Timeline Variables */
    --csd-timeline-horizontal-padding: 4rem 0 2rem;
    --csd-timeline-horizontal-gap: 3rem;
    --csd-timeline-horizontal-line-top: 3.5rem;
    --csd-timeline-horizontal-item-min-width: 200px;
    --csd-timeline-horizontal-item-max-width: 300px;
    
    /* Bottom/Top Timeline Variables */
    --csd-timeline-bottom-padding: 2rem 0 4rem;
    --csd-timeline-bottom-line-bottom: 3.5rem;
}

// Timeline
.csd-timeline {
    position: var(--csd-timeline-position);
    padding: var(--csd-timeline-padding);

    // Central vertical line
    &:before {
        content: '';
        position: absolute;
        top: 0;
        left: 50%;
        height: 100%;
        width: var(--csd-timeline-line-width);
        background-color: var(--csd-timeline-line-color);
        transform: translateX(-50%);
    }

    // Timeline item container
    .csd-timeline-item {
        position: relative;
        margin-bottom: var(--csd-timeline-item-margin-bottom);
        width: var(--csd-timeline-item-width);
        padding-right: var(--csd-timeline-item-padding-right);
        padding-left: var(--csd-timeline-item-padding-left);

        &:last-child {
            margin-bottom: 0;
        }

        // Point on the line
        &:before {
            content: '';
            position: absolute;
            right: var(--csd-timeline-point-position);
            top: var(--csd-timeline-point-top);
            width: var(--csd-timeline-point-size);
            height: var(--csd-timeline-point-size);
            border-radius: var(--csd-timeline-point-border-radius);
            background-color: var(--csd-timeline-point-bg);
            border: var(--csd-timeline-point-border);
            z-index: 1;
        }

        // Date
        .csd-timeline-date {
            position: absolute;
            left: calc(100% + var(--csd-timeline-date-position));
            top: var(--csd-timeline-date-top);
            white-space: nowrap;
            color: var(--csd-timeline-date-color);
            font-size: var(--csd-timeline-date-font-size);
        }

        // Content
        .csd-timeline-content {
            background-color: var(--csd-timeline-content-bg);
            border: var(--csd-timeline-content-border);
            border-radius: var(--csd-timeline-content-border-radius);
            padding: var(--csd-timeline-content-padding);
            
            h4 {
                margin: var(--csd-timeline-title-margin);
                font-size: var(--csd-timeline-title-font-size);
                font-weight: var(--csd-timeline-title-font-weight);
            }

            p {
                margin: var(--csd-timeline-text-margin);
                color: var(--csd-timeline-text-color);
                font-size: var(--csd-timeline-text-font-size);
            }
        }
    }

    // Alternate version
    &.alternate {
        .csd-timeline-item {
            &:nth-child(even) {
                margin-left: var(--csd-timeline-item-width);
                padding-right: 0;
                padding-left: var(--csd-timeline-item-padding-right);

                &:before {
                    right: auto;
                    left: var(--csd-timeline-point-position);
                }
    
                .csd-timeline-date {
                    left: auto;
                    right: calc(100% + var(--csd-timeline-date-position));
                    text-align: right;
                }
            }
        }
    }

    // Horizontal version
    &.horizontal {
        display: flex;
        padding: var(--csd-timeline-horizontal-padding);
        overflow-x: auto;
        align-items: flex-start;
        gap: var(--csd-timeline-horizontal-gap);
        position: relative;
        width: 100%;
        margin: 0 auto;

        // Horizontal line
        &:before {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            top: var(--csd-timeline-horizontal-line-top);
            width: 100%;
            height: var(--csd-timeline-line-width);
            background-color: var(--csd-timeline-line-color);
            transform: none;
        }

        .csd-timeline-item {
            flex: 1;
            min-width: var(--csd-timeline-horizontal-item-min-width);
            max-width: var(--csd-timeline-horizontal-item-max-width);
            margin: 0;
            padding: 0;
            width: 100%;
            position: relative;
            display: flex;
            flex-direction: column;
            align-items: center;

            // Point on the line
            &:before {
                top: -1rem;
                left: 50%;
                right: auto;
                transform: translateX(-50%);
            }

            // Date
            .csd-timeline-date {
                position: absolute;
                top: -2.5rem;
                left: 50%;
                right: auto;
                transform: translateX(-50%);
                text-align: center;
                margin: 0;
                padding: 0;
            }

            // Content
            .csd-timeline-content {
                text-align: center;
                margin-top: 2rem;
                width: 100%;
                
                h4 {
                    margin-bottom: 0.5rem;
                }
            }
        }
    }
}

/* Additional Timeline Variants */
.csd-timeline {
    &.horizontal {
        &.top {
            .csd-timeline-item {
                .csd-timeline-date {
                    top: -2.5rem;
                }

                .csd-timeline-content {
                    margin-top: 2rem;
                }
            }
        }

        &.bottom {
            padding: var(--csd-timeline-bottom-padding);

            &:before {
                top: auto;
                bottom: var(--csd-timeline-bottom-line-bottom);
            }

            .csd-timeline-item {
                &:before {
                    top: auto;
                    bottom: -1rem;
                }

                .csd-timeline-date {
                    top: auto;
                    bottom: -2.5rem;
                }

                .csd-timeline-content {
                    margin-top: 0;
                    margin-bottom: 2rem;
                }
            }
        }

        &.alternate {
            padding: 2rem 0 4rem;

            .csd-timeline-item {
                &:nth-child(even) {
                    margin-left: 0;

                    &:before {
                        top: auto;
                        bottom: -3rem;
                        left: 50%;
                        transform: translateX(-50%);
                    }
    
                    .csd-timeline-date {
                        top: 9rem;
                        right: 50%;
                        transform: translateX(50%);
                        bottom: auto;
                    }

                    .csd-timeline-content {
                        margin-top: 0;
                        margin-bottom: 0;
                    }

                    &:before {
                        top: auto;
                        bottom: -3rem;
                    }
                }

                &:nth-child(odd) {
                    .csd-timeline-date {
                        top: 5rem;
                        bottom: auto;
                    }

                    .csd-timeline-content {
                        margin-top: 10rem;
                        margin-bottom: 0;
                    }

                    &:before {
                        top: auto;
                        bottom: 7rem;
                    }
                }
            }

            &:before {
                top: auto;
                bottom: 11.5rem;
            }
        }
    }
}