/* =========================================================
   10. INNOVATION ENGINE
   Question → Idea → Intake → Exploration → Experimentation
   → Development → Validation → Implementation → Outcome
   ========================================================= */

.engine {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.engine__environment {
    position: absolute;
    inset: 0;
    z-index: -2;
    pointer-events: none;
}

.engine__core {
    position: relative;
    width: min(980px, calc(100% - 2rem));
    margin: 2.5rem auto 1.5rem;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.9rem;
}

.engine__orbit {
    display: none;
}

.engine__orbit--outer {
    inset: -7%;
    border-style: dashed;
    opacity: .4;
    animation: engineOrbit 45s linear infinite;
}

.engine__orbit--inner {
    inset: 16%;
    animation: engineOrbitReverse 30s linear infinite;
}

.engine__centre {
    grid-column: 1 / -1;
    position: relative;
    min-height: 92px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    text-align: center;
    border: 1px solid rgba(255,255,255,.22);
    background: rgba(255,255,255,.035);
}

.engine__centre::after {
    content: "";
    position: absolute;
    inset: -25px;
    border: 1px solid rgba(255,255,255,.05);
    border-radius: 50%;
    animation: enginePulse 4s ease-in-out infinite;
}

.engine__centre-label {
    font-size: .65rem;
    letter-spacing: .2em;
    text-transform: uppercase;
}

.engine__stage {
    position: relative;
    min-height: 110px;
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 18px;
    background: rgba(255,255,255,.025);
    display: grid;
    place-items: center;
    text-align: center;
    padding: 1rem 0.75rem;
    cursor: pointer;
    color: var(--color-white);
    transition:
        transform 0.45s var(--ease-standard),
        border-color 0.35s ease,
        background 0.35s ease,
        box-shadow 0.45s ease;
}

.engine__stage:hover,
.engine__stage.is-active {
    transform: translateY(-4px);
    border-color: rgba(255,255,255,.5);
    background: rgba(255,255,255,.08);
}

.engine__stage-number {
    display: block;
    font-size: .55rem;
    opacity: .4;
    margin-bottom: .25rem;
}

.engine__stage-name {
    display: block;
    font-size: 0.78rem;
    line-height: 1.25;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-white);
}

.engine__stage:nth-child(1) { --angle: 0deg; }
.engine__stage:nth-child(2) { --angle: 40deg; }
.engine__stage:nth-child(3) { --angle: 80deg; }
.engine__stage:nth-child(4) { --angle: 120deg; }
.engine__stage:nth-child(5) { --angle: 160deg; }
.engine__stage:nth-child(6) { --angle: 200deg; }
.engine__stage:nth-child(7) { --angle: 240deg; }
.engine__stage:nth-child(8) { --angle: 280deg; }
.engine__stage:nth-child(9) { --angle: 320deg; }

.engine__panel {
    width: min(700px, calc(100% - 2rem));
    margin: 0.5rem auto 2rem;
    padding: 1.75rem;
    border: 1px solid rgba(255,255,255,.1);
    background: rgba(255,255,255,.025);
    border-radius: 18px;
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

.engine__panel.is-visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.engine__panel-title {
    font-size: 1.3rem;
    margin-bottom: .5rem;
}

.engine__panel-text {
    line-height: 1.7;
    opacity: .65;
}

@keyframes engineOrbit {
    to { transform: rotate(360deg); }
}

@keyframes engineOrbitReverse {
    to { transform: rotate(-360deg); }
}

@keyframes enginePulse {
    0%,100% { transform: scale(.95); opacity: .3; }
    50% { transform: scale(1.08); opacity: .8; }
}

@media (max-width: 767px) {
    .engine {
        min-height: 0;
    }

    .engine__core {
        width: 100%;
        aspect-ratio: auto;
        height: auto;
        margin: 2rem auto 1.5rem;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }

    .engine__orbit {
        display: none;
    }

    .engine__centre {
        position: static;
        transform: none;
        width: auto;
        grid-column: 1 / -1;
        aspect-ratio: auto;
        min-height: 84px;
        border-radius: 18px;
    }

    .engine__centre::after {
        display: none;
    }

    .engine__stage {
        position: static;
        transform: none !important;
        width: auto;
        min-height: 92px;
        aspect-ratio: auto;
        border-radius: 18px;
        padding: 0.85rem 0.6rem;
    }

    .engine__stage:hover,
    .engine__stage.is-active {
        transform: none !important;
    }

    .engine__stage-name {
        font-size: 0.72rem;
    }

    .engine__panel {
        margin: 0.5rem 0 0;
    }
}

/* =========================================================
   ENGINE ENERGY SYSTEM
   ========================================================= */

.engine__stage {
    --stage-energy: var(--color-white);
    --stage-energy-rgb: 255, 255, 255;
}

.engine__stage.energy-discovery {
    --stage-energy: var(--energy-discovery);
    --stage-energy-rgb: var(--energy-discovery-rgb);
}

.engine__stage.energy-technology {
    --stage-energy: var(--energy-technology);
    --stage-energy-rgb: var(--energy-technology-rgb);
}

.engine__stage.energy-growth {
    --stage-energy: var(--energy-growth);
    --stage-energy-rgb: var(--energy-growth-rgb);
}

.engine__stage.energy-engineering {
    --stage-energy: var(--energy-engineering);
    --stage-energy-rgb: var(--energy-engineering-rgb);
}

.engine__stage.energy-experimentation {
    --stage-energy: var(--energy-experimentation);
    --stage-energy-rgb: var(--energy-experimentation-rgb);
}

.engine__stage:hover,
.engine__stage.is-active {
    border-color: rgba(var(--stage-energy-rgb), 0.75);
    background:
        radial-gradient(
            circle,
            rgba(var(--stage-energy-rgb), 0.12),
            rgba(255,255,255,0.025) 70%
        );
    box-shadow:
        0 0 30px rgba(var(--stage-energy-rgb), 0.18),
        0 0 80px rgba(var(--stage-energy-rgb), 0.06);
}

.engine__stage.is-active .engine__stage-name {
    color: var(--stage-energy);
}

.engine__stage--integration {
    border: 1px solid transparent;
    background:
        linear-gradient(rgba(16,16,23,0.94), rgba(16,16,23,0.94)) padding-box,
        linear-gradient(
            135deg,
            var(--energy-discovery),
            var(--energy-technology),
            var(--energy-growth),
            var(--energy-creativity),
            var(--energy-engineering),
            var(--energy-experimentation)
        ) border-box;
}

.engine__stage--integration.is-active,
.engine__stage--integration:hover {
    box-shadow:
        0 0 35px rgba(0,119,255,0.14),
        0 0 70px rgba(153,0,255,0.10),
        0 0 120px rgba(0,201,119,0.06);
}

.engine__centre {
    box-shadow:
        0 0 40px rgba(255,255,255,0.04),
        0 0 90px rgba(0,119,255,0.05),
        0 0 140px rgba(153,0,255,0.04);
}