/**
 * America Visualized — Custom Timeline Component
 *
 * Themeable via CSS custom properties set inline per instance:
 *   --vt-primary     : dot / date color
 *   --vt-accent      : title underline / highlights
 *   --vt-accent-soft : line color (accent at 30% opacity)
 */

/* ==========================================================================
   1. Base Wrapper
   ========================================================================== */

.vt-timeline {
    --vt-primary: #dc4797;
    --vt-accent: #752776;
    --vt-accent-soft: rgba(117, 39, 118, 0.30);

    font-family: "Poppins", -apple-system, BlinkMacSystemFont, sans-serif;
    color: #333;
    margin: 2.5rem 0;
    padding: 0;
    position: relative;
    box-sizing: border-box;
}

.vt-timeline *,
.vt-timeline *::before,
.vt-timeline *::after {
    box-sizing: border-box;
}

.vt-timeline__inner {
    position: relative;
    width: 100%;
}

/* ==========================================================================
   2. Card base (shared between layouts)
   ========================================================================== */

.vt-timeline__card {
    background: #fff;
    border-radius: 2em;
    padding: 1.25rem 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06),
                0 1px 3px rgba(0, 0, 0, 0.04);
    border: 1px solid #f0f0f0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.vt-timeline__card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08),
                0 2px 6px rgba(0, 0, 0, 0.05);
}

.vt-timeline__date {
    font-size: 2rem;
    font-weight: 700;
    color: var(--vt-primary);
    margin-bottom: 0.5rem;
    line-height: 1.2;
    letter-spacing: 0.01em;
}

.vt-timeline__fa-icon {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    width: 48px;
    height: 48px;
    margin-bottom: 0.6rem;
    border-radius: 50%;
    background: var(--vt-accent-soft);
    color: var(--vt-primary);
    font-size: 1.35rem;
    line-height: 1;
}

.vt-timeline__fa-icon i {
    margin: 0 auto;
}

/* Right-side vertical events: mirror icon alignment */
.vt-timeline--vertical .vt-timeline__event--left .vt-timeline__fa-icon {
    margin-left: auto;
}

/* Horizontal layout centers the icon */
.vt-timeline--horizontal .vt-timeline__fa-icon {
    margin-left: auto;
    margin-right: auto;
}

.vt-timeline__title {
    font-size: 1.15rem;
    font-weight: 600;
    margin: 0 0 0.5rem 0;
    color: #222;
    line-height: 1.35;
    padding-bottom: 0.4rem;
    border-bottom: 2px solid var(--vt-accent);
    display: inline-block;
}

.vt-timeline__desc {
    font-size: 0.95rem;
    line-height: 1.55;
    color: #555;
    margin: 0 0 0.75rem 0;
}

.vt-timeline__desc:last-child {
    margin-bottom: 0;
}

.vt-timeline__bullets {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
}

.vt-timeline__bullets li {
    position: relative;
    padding-left: 1.1rem;
    font-size: 0.88rem;
    line-height: 1.5;
    color: #555;
    margin-bottom: 0.35rem;
}

.vt-timeline__bullets li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    background: var(--vt-primary);
    border-radius: 50%;
}

.vt-timeline__bullets li:last-child {
    margin-bottom: 0;
}

/* ==========================================================================
   3. Dot
   ========================================================================== */

.vt-timeline__dot {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--vt-primary);
    border: 4px solid #fff;
    box-shadow: 0 0 0 2px var(--vt-primary),
                0 2px 6px rgba(0, 0, 0, 0.15);
    flex-shrink: 0;
    z-index: 2;
    position: relative;
}

.vt-timeline__icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #fff;
    padding: 3px;
    object-fit: contain;
}

/* ==========================================================================
   4. Vertical Layout (default)
   ========================================================================== */

.vt-timeline--vertical .vt-timeline__inner {
    padding: 1rem 0;
}

.vt-timeline--vertical .vt-timeline__line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 3px;
    background: var(--vt-accent-soft);
    z-index: 1;
}

.vt-timeline--vertical .vt-timeline__event {
    position: relative;
    display: flex;
    align-items: flex-start;
    margin-bottom: 2.5rem;
    min-height: 80px;
}

.vt-timeline--vertical .vt-timeline__event:last-child {
    margin-bottom: 0;
}

.vt-timeline--vertical .vt-timeline__dot {
    position: absolute;
    left: 50%;
    top: 1.75rem;
    transform: translateX(-50%);
}

.vt-timeline--vertical .vt-timeline__content {
    width: calc(50% - 2.5rem);
}

.vt-timeline--vertical .vt-timeline__event--left .vt-timeline__content {
    margin-right: auto;
    padding-right: 0;
    text-align: right;
}

.vt-timeline--vertical .vt-timeline__event--left .vt-timeline__title {
    /* Keep underline aligned with text on right-side layout */
}

.vt-timeline--vertical .vt-timeline__event--right .vt-timeline__content {
    margin-left: auto;
    padding-left: 0;
    text-align: left;
}

/* ==========================================================================
   5. Horizontal Layout
   ========================================================================== */

.vt-timeline--horizontal .vt-timeline__inner {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 3rem 0 1rem 0;
    position: relative;
}

.vt-timeline--horizontal .vt-timeline__line {
    position: absolute;
    top: 3.5rem;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--vt-accent-soft);
    z-index: 1;
}

.vt-timeline--horizontal .vt-timeline__event {
    flex: 1 1 0;
    min-width: 220px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.vt-timeline--horizontal .vt-timeline__dot {
    position: absolute;
    top: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
}

.vt-timeline--horizontal .vt-timeline__content {
    margin-top: 2.75rem;
    width: 100%;
}

.vt-timeline--horizontal .vt-timeline__date {
    text-align: center;
}

.vt-timeline--horizontal .vt-timeline__title {
    display: inline-block;
}

/* ==========================================================================
   6. Animation
   ========================================================================== */

.vt-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease-out, transform 0.7s ease-out;
    transition-delay: var(--vt-delay, 0ms);
    will-change: opacity, transform;
}

.vt-timeline--horizontal .vt-animate {
    transform: translateY(20px);
}

.vt-animate--visible {
    opacity: 1;
    transform: translateY(0);
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .vt-animate {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ==========================================================================
   7. Responsive
   ========================================================================== */

@media (max-width: 768px) {
    /* Vertical: collapse to left-aligned single column */
    .vt-timeline--vertical .vt-timeline__line {
        left: 20px;
        transform: none;
    }

    .vt-timeline--vertical .vt-timeline__event {
        padding-left: 56px;
        margin-bottom: 2rem;
    }

    .vt-timeline--vertical .vt-timeline__dot {
        left: 20px;
        transform: translateX(-50%);
        top: 1.25rem;
    }

    .vt-timeline--vertical .vt-timeline__event--left .vt-timeline__content,
    .vt-timeline--vertical .vt-timeline__event--right .vt-timeline__content {
        width: 100%;
        margin: 0;
        text-align: left;
    }

    /* FA icon: always left-align on mobile */
    .vt-timeline--vertical .vt-timeline__event--left .vt-timeline__fa-icon,
    .vt-timeline--horizontal .vt-timeline__fa-icon {
        margin-left: 0;
        margin-right: 0;
    }

    /* Horizontal: stack vertically on mobile (cleaner than horizontal scroll) */
    .vt-timeline--horizontal .vt-timeline__inner {
        flex-direction: column;
        gap: 0;
        padding: 1rem 0 1rem 0;
    }

    .vt-timeline--horizontal .vt-timeline__line {
        top: 0;
        bottom: 0;
        left: 20px;
        right: auto;
        width: 3px;
        height: auto;
    }

    .vt-timeline--horizontal .vt-timeline__event {
        flex: none;
        min-width: 0;
        width: 100%;
        align-items: flex-start;
        text-align: left;
        padding-left: 56px;
        margin-bottom: 2rem;
        position: relative;
    }

    .vt-timeline--horizontal .vt-timeline__dot {
        top: 1.25rem;
        left: 20px;
    }

    .vt-timeline--horizontal .vt-timeline__content {
        margin-top: 0;
        width: 100%;
        text-align: left;
    }

    .vt-timeline--horizontal .vt-timeline__date {
        text-align: left;
    }

    .vt-timeline__card {
        padding: 1rem 1.15rem;
    }
}

@media (max-width: 480px) {
    .vt-timeline__date {
        font-size: 1.2rem;
    }
    .vt-timeline__title {
        font-size: 1.05rem;
    }
    .vt-timeline__desc {
        font-size: 0.9rem;
    }
}