/* Timeline section — Projects Timeline */

:root {
    --gold: #f3ba2f;
    --rail-color: 72, 224, 214;
    --slide-distance: 80px;
    --slide-duration: 760ms;
    --node-size: 18px;
}

/* Section header overrides for projects timeline */
#projects-section .section-header {
    margin-bottom: 3.5rem;
    position: relative;
}

#projects-section .section-header .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.78rem;
    color: var(--teal);
    text-transform: uppercase;
    letter-spacing: 3px;
}

#projects-section .section-header .eyebrow::before {
    content: "";
    width: 22px;
    height: 1px;
    background: linear-gradient(90deg, var(--teal), transparent);
}

#projects-section .section-header h2 {
    font-size: 4rem;
    line-height: 1;
    letter-spacing: 3px;
}

#projects-section .section-header h2 span.accent {
    color: var(--teal);
}

#projects-section .section-header .header-meta {
    position: absolute;
    right: 0;
    top: 0;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    align-items: flex-end;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

#projects-section .section-header .header-meta .count {
    color: var(--teal);
    font-size: 0.9rem;
}

/* ------------------------------------------------------------------
   Timeline scaffolding
------------------------------------------------------------------ */
.timeline {
    position: relative;
    padding: 4vh 0 4rem;
}

/* Ghost rail */
.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    transform: translateX(-50%);
    background: linear-gradient(180deg,
        rgba(120, 170, 210, 0.05) 0%,
        rgba(120, 170, 210, 0.15) 8%,
        rgba(120, 170, 210, 0.15) 92%,
        rgba(120, 170, 210, 0.05) 100%);
    z-index: 0;
}

/* Filled rail */
.timeline-progress {
    position: absolute;
    left: 50%;
    top: 0;
    width: 2px;
    transform: translateX(-50%);
    height: 0;
    background: linear-gradient(180deg,
        rgba(var(--rail-color), 1) 0%,
        rgba(var(--rail-color), 0.55) 80%,
        rgba(var(--rail-color), 0) 100%);
    box-shadow: 0 0 14px rgba(var(--rail-color), 0.55),
                0 0 28px rgba(var(--rail-color), 0.25);
    z-index: 1;
    transition: height 100ms linear;
}

/* Travelling spark */
.timeline-spark {
    position: absolute;
    left: 50%;
    top: 0;
    width: 14px;
    height: 14px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    background: rgba(var(--rail-color), 0.95);
    box-shadow: 0 0 14px rgba(var(--rail-color), 0.9),
                0 0 40px rgba(var(--rail-color), 0.5);
    z-index: 2;
    opacity: 0;
    pointer-events: none;
    transition: opacity 240ms ease;
}

.timeline.is-active .timeline-spark {
    opacity: 1;
}

/* ------------------------------------------------------------------
   Row
------------------------------------------------------------------ */
.tl-row {
    position: relative;
    display: grid;
    grid-template-columns: 1fr 80px 1fr;
    gap: 0;
    margin-bottom: 14vh;
    z-index: 2;
}

.tl-row:last-of-type {
    margin-bottom: 0;
}

.tl-row .tl-card-slot {
    display: flex;
}

.tl-row .tl-card-slot.left {
    grid-column: 1;
    justify-content: flex-end;
    padding-right: 0.5rem;
}

.tl-row .tl-card-slot.right {
    grid-column: 3;
    justify-content: flex-start;
    padding-left: 0.5rem;
}

.tl-row .tl-card-slot.empty {
    visibility: hidden;
}

/* Marker column */
.tl-marker {
    grid-column: 2;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* Node */
.tl-node {
    position: absolute;
    top: 36px;
    left: 50%;
    transform: translate(-50%, -50%);
    width: var(--node-size);
    height: var(--node-size);
    border-radius: 50%;
    background: var(--bg-deep);
    border: 2px solid rgba(120, 170, 210, 0.35);
    z-index: 3;
    transition: border-color 360ms ease,
                transform 360ms cubic-bezier(0.22, 0.61, 0.36, 1),
                box-shadow 480ms ease;
}

.tl-node::before {
    content: "";
    position: absolute;
    inset: 3px;
    border-radius: 50%;
    background: rgba(120, 170, 210, 0.2);
    transition: background 360ms ease;
}

.tl-node::after {
    content: "";
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    border: 1.5px solid rgba(var(--rail-color), 0.7);
    opacity: 0;
    transform: scale(0.5);
    transition: opacity 240ms ease, transform 240ms ease;
}

.tl-row.is-visible .tl-node {
    border-color: rgba(var(--rail-color), 0.9);
    box-shadow: 0 0 0 4px rgba(var(--rail-color), 0.12),
                0 0 18px rgba(var(--rail-color), 0.55);
}

.tl-row.is-visible .tl-node::before {
    background: rgba(var(--rail-color), 0.95);
}

.tl-row.is-visible .tl-node::after {
    animation: node-pulse 2.4s ease-out infinite;
}

@keyframes node-pulse {
    0%   { opacity: 0.7; transform: scale(0.7); }
    100% { opacity: 0;   transform: scale(2.2); }
}

/* Connector line */
.tl-connector {
    position: absolute;
    top: 36px;
    height: 1px;
    background: linear-gradient(90deg, rgba(120, 170, 210, 0.05), rgba(var(--rail-color), 0.55));
    transform-origin: left center;
    transform: scaleX(0);
    transition: transform 540ms cubic-bezier(0.22, 0.61, 0.36, 1) 240ms;
    z-index: 1;
}

.tl-row[data-side="left"]  .tl-connector {
    right: 50%;
    left: auto;
    width: 40px;
    background: linear-gradient(270deg, rgba(120, 170, 210, 0.05), rgba(var(--rail-color), 0.55));
    transform-origin: right center;
}

.tl-row[data-side="right"] .tl-connector {
    left: 50%;
    width: 40px;
}

.tl-row.is-visible .tl-connector {
    transform: scaleX(1);
}

/* ------------------------------------------------------------------
   Project card
------------------------------------------------------------------ */
.tl-card {
    position: relative;
    width: 100%;
    max-width: 520px;
    background: var(--bg-panel-strong);
    border: 1px solid var(--stroke);
    border-radius: 14px;
    padding: 1.5rem 1.5rem 1.4rem;
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45);
    overflow: hidden;
    opacity: 0;
    transition: opacity var(--slide-duration) cubic-bezier(0.22, 0.61, 0.36, 1),
                transform var(--slide-duration) cubic-bezier(0.22, 0.61, 0.36, 1),
                border-color 320ms ease,
                box-shadow 320ms ease;
}

.tl-row[data-side="left"]  .tl-card { transform: translateX(calc(-1 * var(--slide-distance))) scale(0.98); }
.tl-row[data-side="right"] .tl-card { transform: translateX(var(--slide-distance)) scale(0.98); }

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

.tl-card:hover {
    border-color: rgba(var(--rail-color), 0.55);
    box-shadow: 0 22px 46px rgba(0, 0, 0, 0.55),
                0 0 0 1px rgba(var(--rail-color), 0.25),
                0 0 30px rgba(var(--rail-color), 0.18);
    transform: translateX(0) translateY(-3px) scale(1) !important;
}

/* Featured (gold) */
.tl-card.featured {
    border-color: rgba(243, 186, 47, 0.45);
    box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45),
                0 0 22px rgba(243, 186, 47, 0.08);
}

.tl-card.featured:hover {
    border-color: rgba(243, 186, 47, 0.7);
    box-shadow: 0 22px 46px rgba(0, 0, 0, 0.55),
                0 0 0 1px rgba(243, 186, 47, 0.35),
                0 0 30px rgba(243, 186, 47, 0.2);
}

/* Corner brackets on hover */
.tl-card .corner {
    position: absolute;
    width: 14px;
    height: 14px;
    border-color: rgba(var(--rail-color), 0.85);
    pointer-events: none;
    opacity: 0;
    transition: opacity 220ms ease;
    z-index: 5;
}

.tl-card.featured .corner { border-color: rgba(243, 186, 47, 0.85); }
.tl-card .corner.tl { top: 8px;    left: 8px;  border-top: 1.5px solid; border-left: 1.5px solid; }
.tl-card .corner.tr { top: 8px;    right: 8px; border-top: 1.5px solid; border-right: 1.5px solid; }
.tl-card .corner.bl { bottom: 8px; left: 8px;  border-bottom: 1.5px solid; border-left: 1.5px solid; }
.tl-card .corner.br { bottom: 8px; right: 8px; border-bottom: 1.5px solid; border-right: 1.5px solid; }
.tl-card:hover .corner { opacity: 1; }

/* Sheen sweep on hover */
.tl-card::before {
    content: "";
    position: absolute;
    top: -50%;
    left: -120%;
    width: 60%;
    height: 200%;
    background: linear-gradient(110deg,
        transparent 0%,
        rgba(var(--rail-color), 0) 40%,
        rgba(var(--rail-color), 0.18) 50%,
        rgba(var(--rail-color), 0) 60%,
        transparent 100%);
    transform: translateX(0) rotate(8deg);
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    transition: opacity 220ms ease;
}

.tl-card:hover::before {
    opacity: 1;
    animation: card-sheen 900ms cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
}

@keyframes card-sheen {
    from { transform: translateX(0) rotate(8deg); }
    to   { transform: translateX(420%) rotate(8deg); }
}

.tl-card > * { position: relative; z-index: 2; }

/* Card header */
.tl-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tl-card-logo {
    width: 64px;
    height: 64px;
    border-radius: 12px;
    background: rgba(8, 22, 35, 0.85);
    border: 1px solid rgba(120, 170, 210, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 8px;
}

.tl-card-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.tl-card-titlewrap { flex: 1; min-width: 0; }

.tl-card h3 {
    font-size: 1.7rem;
    line-height: 1.05;
    margin-bottom: 0.25rem;
    transition: color 260ms ease;
}

.tl-card:hover h3 { color: var(--teal); }
.tl-card.featured:hover h3 { color: var(--gold); }

.tl-card-status {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.tl-card-status .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: rgba(var(--rail-color), 0.85);
    box-shadow: 0 0 6px rgba(var(--rail-color), 0.7);
}

.tl-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.18rem 0.55rem;
    border-radius: 999px;
    font-family: "Teko", sans-serif;
    font-size: 0.85rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--gold);
    background: rgba(243, 186, 47, 0.12);
    border: 1px solid rgba(243, 186, 47, 0.5);
}

/* Tech chips */
.tl-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin-bottom: 0.9rem;
}

.tl-tech span {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 0.22rem 0.55rem;
    border-radius: 6px;
    background: rgba(72, 224, 214, 0.07);
    border: 1px solid rgba(72, 224, 214, 0.22);
    color: var(--teal);
    opacity: 0;
    transform: translateY(6px);
    transition: opacity 360ms ease, transform 360ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

.tl-row.is-visible .tl-tech span { opacity: 1; transform: translateY(0); }
.tl-row.is-visible .tl-tech span:nth-child(1) { transition-delay: 420ms; }
.tl-row.is-visible .tl-tech span:nth-child(2) { transition-delay: 480ms; }
.tl-row.is-visible .tl-tech span:nth-child(3) { transition-delay: 540ms; }
.tl-row.is-visible .tl-tech span:nth-child(4) { transition-delay: 600ms; }
.tl-row.is-visible .tl-tech span:nth-child(5) { transition-delay: 660ms; }
.tl-row.is-visible .tl-tech span:nth-child(6) { transition-delay: 720ms; }
.tl-row.is-visible .tl-tech span:nth-child(7) { transition-delay: 780ms; }

/* Highlight stats row */
.tl-stats {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.1rem;
    padding: 0.7rem 0.85rem;
    background: rgba(8, 22, 35, 0.5);
    border: 1px solid rgba(120, 170, 210, 0.12);
    border-radius: 8px;
}

.tl-stats .s { display: flex; flex-direction: column; }

.tl-stats .s-label {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.6rem;
    color: var(--muted);
    letter-spacing: 1.5px;
    text-transform: uppercase;
}

.tl-stats .s-value {
    font-family: "Teko", sans-serif;
    font-size: 1.5rem;
    color: var(--teal);
    line-height: 1;
    letter-spacing: 1px;
    margin-top: 2px;
}

.tl-card.featured .tl-stats .s-value { color: var(--gold); }

/* Actions */
.tl-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
    align-items: center;
}

.tl-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-family: "Teko", sans-serif;
    font-size: 1.05rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 200ms ease, border-color 200ms ease, color 200ms ease, transform 200ms ease;
    text-decoration: none;
}

.tl-btn.primary {
    background: rgba(var(--rail-color), 0.15);
    color: var(--text);
    border: 1px solid rgba(var(--rail-color), 0.55);
}

.tl-btn.primary:hover {
    background: rgba(var(--rail-color), 0.5);
    border-color: rgba(var(--rail-color), 0.85);
    color: var(--bg-deep);
    transform: translateY(-1px);
}

.tl-btn.ghost {
    background: transparent;
    color: var(--muted);
    border: 1px solid rgba(120, 170, 210, 0.25);
}

.tl-btn.ghost:hover {
    color: var(--text);
    border-color: rgba(var(--rail-color), 0.5);
    transform: translateY(-1px);
}

.tl-btn i { font-size: 0.95rem; }

/* Index number */
.tl-index {
    position: absolute;
    top: 0.9rem;
    right: 1.5rem;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
    color: var(--muted);
    letter-spacing: 2px;
    opacity: 0.55;
}

/* ------------------------------------------------------------------
   Description panel — opposite side from card
------------------------------------------------------------------ */
.tl-desc {
    position: relative;
    width: 100%;
    max-width: 440px;
    padding: 1.1rem 1.3rem;
    opacity: 0;
    transition: opacity var(--slide-duration) cubic-bezier(0.22, 0.61, 0.36, 1) 180ms,
                transform var(--slide-duration) cubic-bezier(0.22, 0.61, 0.36, 1) 180ms;
}

.tl-row[data-side="left"]  .tl-desc {
    transform: translateX(var(--slide-distance)) scale(0.98);
    text-align: left;
    border-left: 1px solid rgba(var(--rail-color), 0.35);
}

.tl-row[data-side="right"] .tl-desc {
    transform: translateX(calc(-1 * var(--slide-distance))) scale(0.98);
    text-align: right;
    border-right: 1px solid rgba(var(--rail-color), 0.35);
}

.tl-row.is-visible .tl-desc {
    opacity: 1;
    transform: translateX(0) scale(1);
}

.tl-desc p {
    font-size: 1rem;
    color: var(--muted);
    line-height: 1.7;
    margin: 0;
}

.tl-row .tl-card-slot.desc-slot { align-items: center; }
.tl-row[data-side="left"]  .tl-card-slot.desc-slot { justify-content: flex-start; padding-left: 0.5rem; }
.tl-row[data-side="right"] .tl-card-slot.desc-slot { justify-content: flex-end; padding-right: 0.5rem; }

/* ------------------------------------------------------------------
   End cap
------------------------------------------------------------------ */
.tl-end {
    position: relative;
    text-align: center;
    padding-top: 1rem;
    margin-top: -2rem;
    z-index: 2;
}

.tl-end-node {
    position: relative;
    display: inline-block;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 2px solid rgba(var(--rail-color), 0.55);
    background: var(--bg-deep);
    margin-bottom: 0.8rem;
}

.tl-end-node::before {
    content: "";
    position: absolute;
    inset: 6px;
    border-radius: 50%;
    background: rgba(var(--rail-color), 0.6);
}

.tl-end-label {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.78rem;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.tl-end-label .accent { color: var(--teal); }

/* ------------------------------------------------------------------
   Responsive — collapse to single rail below 900px
------------------------------------------------------------------ */
@media (max-width: 900px) {
    .timeline::before,
    .timeline-progress,
    .timeline-spark {
        left: 24px;
        transform: translateX(0);
    }

    .timeline-spark { transform: translate(0, -50%); }

    .tl-row {
        grid-template-columns: 56px 1fr;
        gap: 0;
        margin-bottom: 3rem;
    }

    .tl-row .tl-card-slot.left,
    .tl-row .tl-card-slot.right {
        grid-column: 2;
        justify-content: flex-start;
        padding: 0;
    }

    .tl-row .tl-card-slot.empty { display: none; }
    .tl-marker { grid-column: 1; }
    .tl-node { left: 24px; }

    .tl-row[data-side="left"]  .tl-card,
    .tl-row[data-side="right"] .tl-card {
        transform: translateX(var(--slide-distance)) scale(0.98);
    }

    .tl-row.is-visible .tl-card { transform: translateX(0) scale(1); }

    /* Desc stacks under card on mobile */
    .tl-row .tl-card-slot.desc-slot {
        display: flex;
        grid-column: 2;
        align-items: flex-start !important;
        padding: 0;
    }

    .tl-row[data-side="left"]  .tl-desc,
    .tl-row[data-side="right"] .tl-desc {
        max-width: 100%;
        text-align: left;
        padding: 0.5rem 0 0 0;
        border: none !important;
        transform: translateY(20px) scale(0.98);
    }

    .tl-row.is-visible .tl-desc { transform: translateY(0) scale(1); }

    .tl-row[data-side="left"]  .tl-connector,
    .tl-row[data-side="right"] .tl-connector {
        left: 24px;
        right: auto;
        width: 32px;
        transform-origin: left center;
        background: linear-gradient(90deg, rgba(var(--rail-color), 0.55), rgba(120, 170, 210, 0.05));
    }

    .tl-card { max-width: 100%; }

    #projects-section .section-header h2 { font-size: 2.8rem; }
    #projects-section .section-header .header-meta { display: none; }

    .tl-end { text-align: left; padding-left: 11px; }
}

/* ------------------------------------------------------------------
   Reduced motion
------------------------------------------------------------------ */
@media (prefers-reduced-motion: reduce) {
    .tl-card,
    .tl-desc,
    .tl-tech span,
    .tl-connector,
    .tl-node,
    .tl-node::after,
    .timeline-progress,
    .timeline-spark {
        transition: none !important;
        animation: none !important;
        transform: none !important;
        opacity: 1 !important;
    }

    .tl-row[data-side="left"]  .tl-card,
    .tl-row[data-side="right"] .tl-card,
    .tl-row[data-side="left"]  .tl-desc,
    .tl-row[data-side="right"] .tl-desc {
        transform: none !important;
    }

    .tl-card::before { display: none; }
}