/* ═══════════════════════════════════════════════════════════
   timeline.css — SPIDER-VERSE INSPIRED
   Dark glassmorphic cards, realistic web strand, neon glows,
   scroll-synced spider, alternating zig-zag layout.
═══════════════════════════════════════════════════════════ */

/* ── Section Background ── */
.section--timeline {
    background: var(--c-bg);
    padding-bottom: var(--sp-2xl);
    position: relative;
    /* Diagonal stripe pattern for texture */
    background-image:
        repeating-linear-gradient(45deg,
            rgba(255, 255, 255, 0.015) 0px,
            rgba(255, 255, 255, 0.015) 20px,
            transparent 20px,
            transparent 40px);
}

/* ── Track Container ── */
.timeline__track {
    position: relative;
    max-width: 860px;
    margin: 0 auto;
    padding: var(--sp-xl) 0;
}

/* ═══════════════════════════════════════════
   WEB STRAND — Realistic silk line
   Multiple layered glows + zig-zag clip-path
═══════════════════════════════════════════ */
.timeline__web-line {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    /* Realistic thin silk under tension */
    height: 100%;
    z-index: 1;
    transform-origin: top center;

    /* Core strand: solid white-ish silk */
    background: rgba(255, 255, 255, 0.85);

    /* Subtle tension glow/light scatter */
    box-shadow:
        0 0 5px rgba(255, 255, 255, 0.6),
        0 0 12px rgba(255, 255, 255, 0.3);
}

/* Ambient glow layer behind the web line */
.timeline__web-glow {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 100%;
    z-index: 0;
    background: rgba(255, 255, 255, 0.08);
    /* Faint white light */
    filter: blur(10px);
    pointer-events: none;
}

@keyframes webPulse {
    0% {
        opacity: 0.7;
        filter: brightness(0.9);
    }

    100% {
        opacity: 1;
        filter: brightness(1.2);
    }
}

/* ═══════════════════════════════════════════
   SPIDER — CSS-only stylized arachnid
   Body + 8 legs via pseudo-elements
═══════════════════════════════════════════ */
.timeline__spider {
    position: absolute;
    top: 0;
    /* JS drives this via GSAP scroll */
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 52px;
    z-index: 20;
    pointer-events: none;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Clean up any old pseudo-elements if present */
.timeline__spider::before, .timeline__spider::after,
.timeline__spider-legs::before, .timeline__spider-legs::after {
    display: none !important;
}

/* Core Container (Body + Head) */
.spider__core {
    position: relative;
    z-index: 5;
    display: flex;
    flex-direction: column;
    align-items: center;
    /* Oscillation micro-movement */
    animation: spiderBreathing 2s infinite alternate ease-in-out;
}

@keyframes spiderBreathing {
    0% { transform: scale(var(--spider-scale, 1)) translateY(0); }
    100% { transform: scale(calc(var(--spider-scale, 1) * 1.02)) translateY(1px); }
}

/* Abdomen (Dark Teal with Red Stripes) */
.spider__body {
    width: 26px;
    height: 34px;
    /* Base dark teal/blue with bright red vertical stripes */
    background: linear-gradient(to right,
        #061a24 0%, #061a24 25%,
        #ff2e63 25%, #ff2e63 35%,
        #041016 35%, #041016 65%,
        #ff2e63 65%, #ff2e63 75%,
        #061a24 75%, #061a24 100%
    );
    border: 1px solid #1a2240;
    border-radius: 50% 50% 45% 45% / 60% 60% 40% 40%;
    /* Stronger contrast and core shadow visibility */
    box-shadow: inset 0 -4px 8px rgba(0, 0, 0, 0.9), 0 0 12px rgba(0, 240, 255, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    z-index: 2;
}

.spider__42 {
    color: #00f0ff;
    font-family: inherit;
    font-weight: 900;
    font-size: 11px;
    letter-spacing: -0.5px;
    text-shadow: 0 0 6px #00f0ff, 0 0 10px rgba(0, 240, 255, 0.8);
    transform: translateY(-2px);
    opacity: 1;
}

/* Thorax / Head */
.spider__head {
    width: 18px;
    height: 14px;
    /* Increased brightness/opacity so it stands out strongly */
    background: #16264c;
    border: 1px solid #2a3a6a;
    border-radius: 40% 40% 50% 50%;
    margin-top: -6px;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.9), inset 0 2px 4px rgba(0, 240, 255, 0.3);
}

/* Glowing Spider Eyes */
.spider__head::before {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 3px;
    background:
        radial-gradient(circle, #00f0ff 60%, transparent 70%) 0px 0px / 2px 2px no-repeat,
        radial-gradient(circle, #00f0ff 60%, transparent 70%) 3px 1px / 2px 2px no-repeat,
        radial-gradient(circle, #00f0ff 60%, transparent 70%) 7px 1px / 2px 2px no-repeat,
        radial-gradient(circle, #00f0ff 60%, transparent 70%) 10px 0px / 2px 2px no-repeat;
    filter: drop-shadow(0 0 3px #00f0ff);
    z-index: 5;
}

/* Fangs with Cyan Glow */
.spider__fang {
    position: absolute;
    bottom: -4px;
    width: 3px;
    height: 7px;
    background: #00f0ff;
    border-radius: 2px;
    box-shadow: 0 0 6px #00f0ff, 0 0 12px rgba(0, 240, 255, 0.6);
}

.spider__fang.left { left: 3px; transform: rotate(15deg); }
.spider__fang.right { right: 3px; transform: rotate(-15deg); }

/* Legs Container */
.spider__legs {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(var(--spider-scale, 1));
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Base Proximal Leg Segment (Femur - Red/Pink bases) */
.s-leg {
    position: absolute;
    top: 26px; /* Anchor closer to the smaller head/thorax */
    left: 50%;
    margin-left: -1px;
    width: 2px;
    height: 16px;
    background: linear-gradient(to bottom, #ff2e63 0%, #aa2315 100%);
    border-radius: 2px;
    transform-origin: top center;
    box-shadow: inset 0 0 2px rgba(0,0,0,0.5);
}

/* Distal Leg Segment (Tibia/Tarsus - Dark to Cyan tip bent outwards) */
.s-leg-inner {
    position: absolute;
    top: 100%; /* Append exactly to the end of proximal segment */
    left: 0;
    width: 2px;
    height: 24px;
    background: linear-gradient(to bottom, #080d1a 0%, #151b2b 75%, #00f0ff 85%, #00f0ff 100%);
    border-radius: 2px;
    transform-origin: top center;
    box-shadow: 0 6px 6px -2px rgba(0, 240, 255, 0.5);
}

/* -- LEFT LEGS -- */
.l1 { transform: rotate(calc(60deg + var(--leg-stretch, 0) * 15deg)); }
.l1 .s-leg-inner { transform: rotate(calc(-45deg + var(--leg-stretch, 0) * 15deg)); }

.l2 { transform: rotate(calc(90deg + var(--leg-stretch, 0) * 20deg)); }
.l2 .s-leg-inner { height: 34px; transform: rotate(calc(-55deg + var(--leg-stretch, 0) * 15deg)); }

.l3 { transform: rotate(calc(125deg - var(--leg-stretch, 0) * 15deg)); }
.l3 .s-leg-inner { transform: rotate(calc(-40deg + var(--leg-stretch, 0) * 15deg)); }

.l4 { transform: rotate(calc(160deg - var(--leg-stretch, 0) * 10deg)); }
.l4 .s-leg-inner { height: 36px; transform: rotate(calc(-30deg + var(--leg-stretch, 0) * 10deg)); }

/* -- RIGHT LEGS -- */
.r1 { transform: rotate(calc(-60deg - var(--leg-stretch, 0) * 15deg)); }
.r1 .s-leg-inner { transform: rotate(calc(45deg - var(--leg-stretch, 0) * 15deg)); }

.r2 { transform: rotate(calc(-90deg - var(--leg-stretch, 0) * 20deg)); }
.r2 .s-leg-inner { height: 34px; transform: rotate(calc(55deg - var(--leg-stretch, 0) * 15deg)); }

.r3 { transform: rotate(calc(-125deg + var(--leg-stretch, 0) * 15deg)); }
.r3 .s-leg-inner { transform: rotate(calc(40deg - var(--leg-stretch, 0) * 15deg)); }

.r4 { transform: rotate(calc(-160deg + var(--leg-stretch, 0) * 10deg)); }
.r4 .s-leg-inner { height: 36px; transform: rotate(calc(30deg - var(--leg-stretch, 0) * 10deg)); }

/* ═══════════════════════════════════════════
   TIMELINE EVENT — Alternating layout
═══════════════════════════════════════════ */
.timeline__event {
    position: relative;
    display: flex;
    margin-bottom: var(--sp-lg);
    z-index: 2;

    /* Start hidden — GSAP animates in */
    opacity: 0;
    transform: translateY(50px);
}

/* Odd events → left side */
.timeline__event:nth-child(odd) {
    justify-content: flex-start;
    padding-right: calc(50% + 50px);
}

/* Even events → right side */
.timeline__event:nth-child(even) {
    justify-content: flex-end;
    padding-left: calc(50% + 50px);
}

/* ── Node Markers — Glowing web knots ── */
.timeline__event::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--c-cyan) 30%, transparent 70%);
    border: 2px solid var(--c-cyan);
    z-index: 5;
    box-shadow:
        0 0 8px var(--c-cyan),
        0 0 20px rgba(0, 240, 255, 0.4);
    transition: all 0.3s var(--ease-pop);
}

.timeline__event:hover::before {
    transform: translate(-50%, -50%) scale(1.5);
    background: radial-gradient(circle, var(--c-magenta) 30%, transparent 70%);
    border-color: var(--c-magenta);
    box-shadow:
        0 0 12px var(--c-magenta),
        0 0 30px rgba(217, 0, 255, 0.5);
}

/* ═══════════════════════════════════════════
   EVENT CARD — Dark glassmorphic panel
═══════════════════════════════════════════ */
.event__content {
    padding: var(--sp-md) calc(var(--sp-md) + 4px);
    background: rgba(15, 17, 24, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(0, 240, 255, 0.15);
    border-radius: 6px;
    position: relative;
    overflow: hidden;
    transition:
        border-color 0.4s ease,
        box-shadow 0.4s ease,
        transform 0.3s var(--ease-pop);
}

/* Neon accent stripe on the left edge */
.event__content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(180deg, var(--c-cyan), var(--c-magenta));
    border-radius: 3px 0 0 3px;
}

/* Hover glow effect */
.event__content:hover {
    border-color: rgba(0, 240, 255, 0.35);
    box-shadow:
        0 0 15px rgba(0, 240, 255, 0.1),
        0 4px 30px rgba(0, 0, 0, 0.4);
    transform: translateY(-3px);
}

/* Alternating accent colors for even cards */
.timeline__event:nth-child(even) .event__content::before {
    background: linear-gradient(180deg, var(--c-magenta), var(--c-red));
}

.timeline__event:nth-child(even) .event__content:hover {
    border-color: rgba(217, 0, 255, 0.35);
    box-shadow:
        0 0 15px rgba(217, 0, 255, 0.1),
        0 4px 30px rgba(0, 0, 0, 0.4);
}

/* ── Pointer Triangles — connecting cards to web line ── */
.event__content::after {
    content: '';
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-width: 8px;
    border-style: solid;
}

/* Odd cards: pointer on the right → pointing toward center line */
.timeline__event:nth-child(odd) .event__content::after {
    right: -16px;
    border-color: transparent transparent transparent rgba(0, 240, 255, 0.3);
}

/* Even cards: pointer on the left → pointing toward center line */
.timeline__event:nth-child(even) .event__content::after {
    left: -16px;
    border-color: transparent rgba(217, 0, 255, 0.3) transparent transparent;
}

/* ── Event Typography ── */
.event__time {
    font-family: var(--ff-body);
    font-weight: 800;
    font-size: 0.8rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    display: block;
    margin-bottom: 2px;
}

.event__title {
    font-family: var(--ff-body);
    font-weight: 800;
    font-size: clamp(1rem, 2vw, 1.3rem);
    color: var(--c-text);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1.45;
    margin-bottom: var(--sp-xs);
    /* Subtle neon text shadow */
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
}

.event__desc {
    font-family: var(--ff-body);
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--c-text-dim);
    line-height: 1.5;
}

/* ── Event icon (decorative) ── */
.event__icon {
    display: block;
    font-size: 1.4rem;
    margin-bottom: var(--sp-xs);
    filter: drop-shadow(0 0 6px currentColor);
}

/* ═══════════════════════════════════════════
   ANIMATIONS — Card flash on reveal
═══════════════════════════════════════════ */
.timeline__event.in-view .event__box {
    animation: cardFlash 0.6s ease-out;
}

@keyframes cardFlash {
    0% {
        border-color: rgba(0, 240, 255, 0.6);
        box-shadow: 0 0 25px rgba(0, 240, 255, 0.3);
    }

    100% {
        border-color: rgba(0, 240, 255, 0.15);
        box-shadow: none;
    }
}

.timeline__event:nth-child(even).in-view .event__box {
    animation: cardFlashAlt 0.6s ease-out;
}

@keyframes cardFlashAlt {
    0% {
        border-color: rgba(217, 0, 255, 0.6);
        box-shadow: 0 0 25px rgba(217, 0, 255, 0.3);
    }

    100% {
        border-color: rgba(217, 0, 255, 0.15);
        box-shadow: none;
    }
}

/* Web vibration when cards enter view */
.timeline__web-line.vibrate {
    animation: webVibrate 0.4s ease-out;
}

@keyframes webVibrate {
    0% {
        transform: translateX(-50%) scaleX(1);
    }

    25% {
        transform: translateX(calc(-50% + 2px)) scaleX(1.3);
    }

    50% {
        transform: translateX(calc(-50% - 1px)) scaleX(1.1);
    }

    75% {
        transform: translateX(calc(-50% + 1px)) scaleX(1.15);
    }

    100% {
        transform: translateX(-50%) scaleX(1);
    }
}

/* ═══════════════════════════════════════════
   RESPONSIVE — Mobile single-column
═══════════════════════════════════════════ */
@media (max-width: 768px) {
    .timeline__web-line {
        left: 24px;
        transform: none;
        clip-path: none;
        width: 3px;
    }

    .timeline__web-glow {
        left: 24px;
        transform: none;
        width: 20px;
    }

    /* Show spider on mobile and follow the web line */
    .timeline__spider {
        --spider-scale: 0.6;
        left: 24px;
    }

    .timeline__event:nth-child(odd),
    .timeline__event:nth-child(even) {
        padding-left: 60px;
        padding-right: 0;
        justify-content: flex-start;
    }

    .timeline__event::before {
        left: 24px;
    }

    .timeline__event:nth-child(odd) .event__content::after,
    .timeline__event:nth-child(even) .event__content::after {
        left: -16px;
        right: auto;
        border-color: transparent rgba(0, 240, 255, 0.3) transparent transparent;
    }

    .event__title {
        font-size: 1.3rem;
    }
}

@media (max-width: 480px) {
    .timeline__web-line {
        left: 16px;
    }

    .timeline__web-glow {
        left: 16px;
    }

    .timeline__event::before {
        left: 16px;
        width: 14px;
        height: 14px;
    }

    .timeline__event:nth-child(odd),
    .timeline__event:nth-child(even) {
        padding-left: 46px;
    }

    .timeline__spider {
        left: 16px;
    }
}