/* innovation-sponsor-white.css */
/* "White Canvas" Design System */

:root {
    --inn-white: #FFFFFF;
    --inn-black: #000000;
    --inn-impact-blue: #4A90E2;
    --inn-glass-border: rgba(0, 0, 0, 0.08);
    --inn-font-serif: "Playfair Display", serif;
    --inn-font-sans: "DM Sans", sans-serif;
}

/* --- Canvas Container --- */
.innovation-section {
    position: relative;
    background-color: var(--inn-white);
    color: var(--inn-black);
    padding: 120px 0;
    overflow: hidden;
    z-index: 10;
}

/* --- Fluid Energy Paths (SVG Wrapper) --- */
.inn-fluid-stage {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.inn-fluid-path {
    fill: none;
    stroke: var(--inn-impact-blue);
    stroke-width: 2px;
    opacity: 0.15;
    stroke-linecap: round;
}

/* --- Typography & Header --- */
.inn-header {
    position: relative;
    z-index: 2;
    text-align: center;
    margin-bottom: 100px;
}

.inn-title {
    font-family: var(--inn-font-serif);
    font-size: 64px;
    font-weight: 700;
    line-height: 1.1;
    color: var(--inn-black);
    margin-bottom: 20px;
}

.inn-title .char {
    display: inline-block;
    opacity: 0;
    /* JS reveal */
    transform: translateY(20px);
}

.inn-subtitle {
    font-family: var(--inn-font-sans);
    font-size: 20px;
    color: rgba(0, 0, 0, 0.6);
    max-width: 600px;
    margin: 0 auto;
}

/* --- Layout Grid --- */
.inn-grid {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Refractive Glass Card --- */
.inn-card {
    position: relative;
    padding: 60px 40px;
    /* The "Invisible" state */
    background: transparent;
    border: 1px solid transparent;
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    cursor: pointer;
    /* Interaction trigger */
}

/* The "Glass" Overlay */
.inn-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    /* Refraction Simulation */
    backdrop-filter: blur(0px);
    -webkit-backdrop-filter: blur(0px);
    border: 1px solid var(--inn-glass-border);
    opacity: 0;
    /* Hidden initially */
    z-index: -1;
    transform: scale(0.95);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Text Content - Initially Blurred to simulate "out of focus" */
.inn-content {
    position: relative;
    filter: blur(4px);
    opacity: 0.4;
    transition: all 0.8s ease;
    transform: translateY(20px);
}

.inn-number {
    font-size: 14px;
    font-weight: 700;
    color: var(--inn-impact-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
    display: block;
}

.inn-card-title {
    font-family: var(--inn-font-serif);
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--inn-black);
}

.inn-card-desc {
    font-family: var(--inn-font-sans);
    font-size: 16px;
    line-height: 1.8;
    color: rgba(0, 0, 0, 0.7);
}

/* --- Active / Hover State (Refraction Clear) --- */
/* We toggle .active class via JS scroll or hover */
.inn-card.active .inn-content,
.inn-card:hover .inn-content {
    filter: blur(0);
    opacity: 1;
    transform: translateY(0);
}

.inn-card.active::before,
.inn-card:hover::before {
    opacity: 1;
    transform: scale(1);
    box-shadow: 0 20px 80px rgba(0, 0, 0, 0.05);
}

/* --- Mobile Haptics (Ripple) --- */
.inn-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(74, 144, 226, 0.2);
    transform: scale(0);
    pointer-events: none;
    animation: rippleAnim 0.6s linear;
}

@keyframes rippleAnim {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

/* --- Responsive --- */
@media (max-width: 991px) {
    .inn-title {
        font-size: 42px;
    }

    .inn-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .inn-card {
        padding: 40px 30px;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        /* Separator */
    }

    /* On mobile, we might keep them semi-visible for usability, 
       or rely purely on the scroll trigger to clarify them */
    .inn-content {
        filter: blur(0px);
        /* Usability first on mobile */
        opacity: 0.8;
    }
}