/* ==============================================
   About Page — Timeline Styles
   ============================================== */

/* ── Timeline Section ──────────────────────── */
.timeline-section {
    padding: var(--space-11) 0 var(--space-12);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

/* ── Vertical Line ─────────────────────────── */
.timeline-line {
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border);
    transform: translateX(-50%);
}

.timeline-line-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: linear-gradient(
        180deg,
        var(--accent) 0%,
        var(--accent) 80%,
        transparent 100%
    );
    transition: height 0.05s linear;
    border-radius: 0 0 1px 1px;
}

/* ── Timeline Card ─────────────────────────── */
.timeline-card {
    position: relative;
    width: 50%;
    padding: var(--space-6) 0;
    /* Start hidden for scroll animation */
    opacity: 0;
    transition:
        opacity 1s var(--ease-out),
        transform 1s var(--ease-out);
}

.timeline-card--left {
    padding-right: var(--space-8);
    text-align: right;
    transform: translateX(-40px);
}

.timeline-card--right {
    margin-left: 50%;
    padding-left: var(--space-8);
    text-align: left;
    transform: translateX(40px);
}

.timeline-card.is-visible {
    opacity: 1;
    transform: translateX(0);
}

/* ── Timeline Dot ──────────────────────────── */
.timeline-dot {
    position: absolute;
    top: var(--space-7);
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2.5px solid var(--border);
    background-color: var(--bg-primary);
    z-index: 2;
    transition: all var(--dur-slow) var(--ease-out);
}

.timeline-card--left .timeline-dot {
    right: -7px;
}

.timeline-card--right .timeline-dot {
    left: -7px;
}

.timeline-dot.is-active {
    border-color: var(--accent);
    background-color: var(--accent);
    box-shadow: 0 0 0 6px rgba(250, 129, 18, 0.15);
}

/* ── Card Inner ────────────────────────────── */
.timeline-card-inner {
    background-color: var(--surface-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-6) var(--space-7);
    transition:
        box-shadow var(--dur-base) var(--ease-out),
        border-color var(--dur-base) ease;
}

.timeline-card:hover .timeline-card-inner {
    box-shadow: var(--shadow-md);
    border-color: var(--border-hover);
}

.timeline-card-inner .overline {
    display: block;
    margin-bottom: var(--space-3);
}

.timeline-card-inner h3 {
    font-size: 1.375rem;
    margin-bottom: var(--space-3);
}

.timeline-card-inner p {
    font-size: 1rem;
    line-height: 1.75;
}

/* ── Values List (inside card 4) ───────────── */
.values-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    margin-top: var(--space-3);
}

.value-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.value-item strong {
    font-size: 0.9375rem;
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.value-item span {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Align values text left even in left-aligned cards */
.timeline-card--right .values-list {
    text-align: left;
}

.timeline-card--left .values-list {
    text-align: left;
}


/* ── Mobile Responsive ─────────────────────── */
@media (max-width: 768px) {
    .timeline-line {
        left: 24px;
    }

    .timeline-card,
    .timeline-card--left,
    .timeline-card--right {
        width: 100%;
        margin-left: 0;
        padding-left: 56px;
        padding-right: 0;
        text-align: left;
    }

    .timeline-card--left {
        transform: translateY(30px);
    }

    .timeline-card--right {
        transform: translateY(30px);
    }

    .timeline-card.is-visible {
        transform: translateY(0);
    }

    .timeline-dot {
        left: 17px !important;
        right: auto !important;
    }

    .timeline-card-inner {
        padding: var(--space-5);
    }
}