/* ==================================================================
   "Watch it connect itself" — scroll-driven connections demo.
   Beat state lives on #demo[data-progress-beat="1..4"], set by
   js/connections.js. Default markup ships beat 4 (fully connected)
   so no-JS visitors and reduced-motion users see the finished graph.
   ================================================================== */

.demo { padding: var(--section-pad) 0 0; }

.demo-head { text-align: center; }
.demo-head .section-sub { margin-left: auto; margin-right: auto; max-width: 520px; }

/* Track/stage are inert by default (no-JS = final graph, normal flow).
   js/connections.js adds .demo-active, which enables pinning on desktop. */
.demo-track { height: auto; }

.demo-stage {
    position: static;
    padding: 40px 0 64px;
}

@media (min-width: 769px) {
    #demo.demo-active .demo-track { height: 230vh; }
    #demo.demo-active .demo-stage {
        position: sticky;
        top: 72px;
    }
}

.demo-stage-inner {
    position: relative;
    height: min(72vh, 560px);
    background:
        radial-gradient(90% 90% at 50% 0%, rgba(226,114,91,0.05), transparent 60%),
        var(--bone);
    border: 1px solid var(--line);
    border-radius: 22px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

/* dotted paper texture inside the stage */
.demo-stage-inner::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(28,26,25,0.10) 1px, transparent 1px);
    background-size: 26px 26px;
    opacity: 0.35;
    pointer-events: none;
}

/* ---- connection lines ---- */

.demo-lines {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.demo-line {
    fill: none;
    stroke: var(--coral);
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    opacity: 0;
    transition: stroke-dashoffset 0.9s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
}

/* ---- cards ---- */

.demo-card {
    position: absolute;
    width: min(280px, 30%);
    background: var(--paper);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-md);
    padding: 14px 16px;
    opacity: 0;
    transform: translateY(16px) scale(0.97);
    transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1), transform 0.55s cubic-bezier(0.16, 1, 0.3, 1);
}

.demo-card header {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--ink-mute);
    margin-bottom: 6px;
}

.demo-card p {
    font-size: 14.5px;
    font-weight: 500;
    color: var(--ink-two);
    line-height: 1.45;
}

.demo-meta {
    display: inline-block;
    margin-top: 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--coral-deep);
    background: var(--coral-tint);
    border-radius: 999px;
    padding: 2px 10px;
}

.card-note    { left: 5%;  top: 10%; }
.card-task    { left: 38%; top: 44%; }
.card-person  { right: 5%; top: 9%;  }
.card-project { left: 8%;  bottom: 10%; }

.card-person p, .card-project p { font-weight: 700; color: var(--ink); }

/* ---- 'linked automatically' label ---- */

.demo-label {
    position: absolute;
    left: 40%;
    top: 33%;
    font-size: 12px;
    font-style: italic;
    font-family: var(--font-display);
    color: var(--coral-deep);
    background: var(--paper);
    border: 1px solid var(--coral-soft);
    border-radius: 999px;
    padding: 3px 12px;
    box-shadow: var(--shadow-sm);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.5s ease 0.55s, transform 0.5s ease 0.55s;
}

/* ---- closing beat ---- */

.demo-close {
    position: absolute;
    right: 6%;
    bottom: 9%;
    max-width: 320px;
    text-align: right;
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.demo-punch {
    font-family: var(--font-display);
    font-weight: 600;
    font-style: italic;
    font-size: clamp(22px, 2.6vw, 30px);
    letter-spacing: -0.015em;
    color: var(--ink);
    margin-bottom: 14px;
}

/* ---- mascot spectator ---- */

.demo-mascot {
    position: absolute;
    right: 22px;
    bottom: -14px;
    width: 64px;
    height: 64px;
    transform: rotate(-4deg);
}

/* ---- beat states (cumulative) ---- */

#demo:is([data-progress-beat="1"], [data-progress-beat="2"], [data-progress-beat="3"], [data-progress-beat="4"]) [data-beat="1"],
#demo:is([data-progress-beat="2"], [data-progress-beat="3"], [data-progress-beat="4"]) [data-beat="2"],
#demo:is([data-progress-beat="3"], [data-progress-beat="4"]) [data-beat="3"],
#demo[data-progress-beat="4"] [data-beat="4"] {
    opacity: 1;
    transform: none;
}

#demo:is([data-progress-beat="2"], [data-progress-beat="3"], [data-progress-beat="4"]) .line-1,
#demo:is([data-progress-beat="3"], [data-progress-beat="4"]) .line-2,
#demo:is([data-progress-beat="3"], [data-progress-beat="4"]) .line-3 {
    stroke-dashoffset: 0;
    opacity: 1;
}

#demo[data-progress-beat="3"] .line-2,
#demo[data-progress-beat="4"] .line-2 { transition-delay: 0.15s; }
#demo[data-progress-beat="3"] .line-3,
#demo[data-progress-beat="4"] .line-3 { transition-delay: 0.4s; }

/* ---- reduced motion: staging still steps through beats, but nothing
   moves — cards appear in place (opacity only), lines appear undrawn ---- */

@media (prefers-reduced-motion: reduce) {
    .demo-card, .demo-label, .demo-close { transition: opacity 0.01s; transform: none; }
    .demo-line { transition: opacity 0.01s; stroke-dasharray: none; stroke-dashoffset: 0; }
}

/* ---- mobile: static vertical story, no pinning ---- */

@media (max-width: 768px) {
    .demo-track { height: auto; }
    .demo-stage { position: static; padding: 32px 0 48px; }

    .demo-stage-inner {
        height: auto;
        padding: 24px 20px 56px;
        display: flex;
        flex-direction: column;
        gap: 18px;
        align-items: stretch;
    }

    .demo-lines { display: none; }

    .demo-card, .demo-label, .demo-close {
        position: static;
        width: 100%;
        max-width: none;
        opacity: 1;
        transform: none;
    }

    .demo-label { align-self: center; margin: -6px 0; }

    /* vertical thread connecting the stacked cards */
    .demo-card { position: relative; }
    .demo-card:not(:first-of-type)::before {
        content: '';
        position: absolute;
        top: -19px;
        left: 28px;
        width: 2px;
        height: 18px;
        background: var(--coral-soft);
    }

    .demo-close { text-align: center; padding-top: 8px; }
    .demo-mascot { right: 14px; bottom: -12px; width: 52px; height: 52px; }
}