@property --isr-angle {
    syntax: '<angle>';
    inherits: false;
    initial-value: 0deg;
}

.isr-section {
    --isr-primary: #155EEF;
    --isr-secondary: #4F46E5;
    --isr-accent: #00C2FF;
    --isr-text: #0F172A;
    --isr-muted: #64748B;
    --isr-bg: #F8FAFC;
    --isr-card-bg: rgba(255, 255, 255, 0.78);
    --isr-card-bg-hover: rgba(255, 255, 255, 0.92);
    --isr-border: rgba(255, 255, 255, 0.6);
    --isr-radius: 28px;
    --isr-ease: cubic-bezier(0.16, 1, 0.3, 1);
    --isr-speed: 300ms;
    --isr-shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.06), 0 30px 60px -25px rgba(21, 94, 239, 0.18);
    --isr-shadow-hover: 0 24px 48px rgba(15, 23, 42, 0.12), 0 50px 90px -30px rgba(21, 94, 239, 0.35);
    position: relative;
    background: var(--isr-bg);
    padding: 120px 0;
    overflow: visible;
}
.isr-section + .isr-section { padding-top: 0; }

.isr-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    pointer-events: none;
    border-radius: inherit;
}
.isr-bg-grid {
    position: absolute;
    inset: -10%;
    background-image:
        linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
    background-size: 56px 56px;
    -webkit-mask-image: radial-gradient(circle at 50% 25%, rgba(0, 0, 0, 0.85), transparent 72%);
    mask-image: radial-gradient(circle at 50% 25%, rgba(0, 0, 0, 0.85), transparent 72%);
}
.isr-bg-mesh {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(600px circle at 15% 20%, rgba(21, 94, 239, 0.12), transparent 60%),
        radial-gradient(520px circle at 85% 12%, rgba(0, 194, 255, 0.12), transparent 55%),
        radial-gradient(700px circle at 50% 105%, rgba(79, 70, 229, 0.10), transparent 60%);
    background-size: 200% 200%;
    animation: isr-mesh-drift 26s ease-in-out infinite alternate;
}
.isr-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(70px);
    opacity: 0.32;
    will-change: transform;
}
.isr-orb-1 { width: 340px; height: 340px; top: -100px; left: -70px; background: var(--isr-primary); animation: isr-orb-float-a 22s ease-in-out infinite alternate; }
.isr-orb-2 { width: 280px; height: 280px; bottom: -70px; right: -50px; background: var(--isr-accent); animation: isr-orb-float-b 26s ease-in-out infinite alternate; }
.isr-orb-3 { width: 220px; height: 220px; top: 38%; right: 18%; background: var(--isr-secondary); opacity: 0.2; animation: isr-orb-float-a 30s ease-in-out infinite alternate; }

@keyframes isr-mesh-drift {
    0% { background-position: 0% 0%, 100% 0%, 50% 100%; }
    100% { background-position: 8% 12%, 92% 16%, 54% 92%; }
}
@keyframes isr-orb-float-a {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(28px, 36px) scale(1.06); }
}
@keyframes isr-orb-float-b {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(-24px, -32px) scale(1.05); }
}

.isr-container { position: relative; z-index: 1; }

.isr-heading {
    max-width: 720px;
    margin: 0 auto 64px;
    text-align: center;
}
.isr-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(21, 94, 239, 0.08);
    color: var(--isr-primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    margin-bottom: 22px;
}
.isr-section h2 {
    color: var(--isr-text);
    font-size: clamp(2.2rem, 4.4vw, 3.6rem);
    line-height: 1.08;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 18px;
}
.isr-heading p {
    color: var(--isr-muted);
    font-size: 20px;
    line-height: 1.6;
    margin: 0;
}

/* --- Service cards --- */
.isr-card-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 28px;
    perspective: 1400px;
}

.isr-card {
    --isr-scroll-x: 0px;
    --isr-scroll-y: 0px;
    --isr-scroll-scale: 1;
    --isr-scroll-opacity: 1;
    --isr-hover-y: 0px;
    --isr-rotate-x: 0deg;
    --isr-rotate-y: 0deg;
    position: relative;
    border-radius: var(--isr-radius);
    padding: 2px;
    background:
        linear-gradient(135deg, rgba(21, 94, 239, 0.08), rgba(0, 194, 255, 0.05) 45%, rgba(79, 70, 229, 0.07)),
        var(--isr-card-bg);
    background-size: 220% 220%, 100% 100%;
    background-position: 0% 0%, 0 0;
    border: 1px solid var(--isr-border);
    box-shadow: var(--isr-shadow-soft);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    opacity: var(--isr-scroll-opacity);
    transform:
        translate3d(var(--isr-scroll-x), calc(var(--isr-scroll-y) + var(--isr-hover-y)), 0)
        scale(var(--isr-scroll-scale))
        rotateX(var(--isr-rotate-x))
        rotateY(var(--isr-rotate-y));
    transform-style: preserve-3d;
    transition:
        transform var(--isr-speed) var(--isr-ease),
        opacity 220ms ease-out,
        box-shadow var(--isr-speed) var(--isr-ease),
        background-position 600ms var(--isr-ease),
        border-color var(--isr-speed) var(--isr-ease);
    will-change: transform, opacity;
    outline: none;
}
.isr-card::after {
    content: '';
    position: absolute;
    inset: 14px 14px -14px 14px;
    z-index: -1;
    border-radius: inherit;
    background: linear-gradient(160deg, rgba(21, 94, 239, 0.28), rgba(0, 194, 255, 0.2));
    filter: blur(32px);
    opacity: 0;
    transition: opacity 420ms var(--isr-ease);
}
.isr-card:hover,
.isr-card:focus-within {
    --isr-hover-y: -12px;
    box-shadow: var(--isr-shadow-hover);
    background-position: 100% 100%, 0 0;
    border-color: rgba(21, 94, 239, 0.28);
}
.isr-card:hover::after,
.isr-card:focus-within::after { opacity: 0.6; }

.isr-card-border {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: conic-gradient(from var(--isr-angle), transparent 0%, var(--isr-accent) 18%, var(--isr-primary) 38%, transparent 58%);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 380ms var(--isr-ease);
    pointer-events: none;
    z-index: 2;
}
.isr-card:hover .isr-card-border,
.isr-card:focus-within .isr-card-border {
    opacity: 1;
    animation: isr-rotate-border 3.4s linear infinite;
}
@keyframes isr-rotate-border { to { --isr-angle: 360deg; } }

.isr-card-spotlight {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    background: radial-gradient(360px circle at var(--isr-mx, 50%) var(--isr-my, 50%), rgba(255, 255, 255, 0.55), transparent 62%);
    opacity: 0;
    transition: opacity 380ms var(--isr-ease);
    pointer-events: none;
    z-index: 1;
    mix-blend-mode: overlay;
}
.isr-card:hover .isr-card-spotlight,
.isr-card:focus-within .isr-card-spotlight { opacity: 1; }

.isr-card-inner {
    position: relative;
    z-index: 3;
    background: var(--isr-card-bg);
    border-radius: calc(var(--isr-radius) - 2px);
    padding: 40px 34px;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.isr-icon-box {
    width: 68px;
    height: 68px;
    border-radius: 20px;
    display: grid;
    place-items: center;
    margin-bottom: 26px;
    font-size: 28px;
    color: var(--isr-primary);
    background: linear-gradient(135deg, rgba(21, 94, 239, 0.14), rgba(0, 194, 255, 0.16));
    box-shadow: inset 0 0 0 1px rgba(21, 94, 239, 0.1);
    transition: transform var(--isr-speed) var(--isr-ease), box-shadow var(--isr-speed) var(--isr-ease);
}
.isr-card:hover .isr-icon-box,
.isr-card:focus-within .isr-icon-box {
    transform: rotate(8deg) scale(1.1);
    box-shadow: 0 0 0 8px rgba(0, 194, 255, 0.12), inset 0 0 0 1px rgba(21, 94, 239, 0.16);
}

.isr-card-inner h3 {
    color: var(--isr-text);
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin: 0 0 12px;
}
.isr-card-inner p {
    color: var(--isr-muted);
    font-size: 16px;
    line-height: 1.65;
    margin: 0 0 28px;
    flex-grow: 1;
}

.isr-cta {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: var(--isr-primary);
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.01em;
    overflow: hidden;
    padding: 4px 2px;
}
.isr-cta span { position: relative; }
.isr-cta span::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, var(--isr-primary), var(--isr-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 320ms var(--isr-ease);
}
.isr-card:hover .isr-cta span::after,
.isr-card:focus-within .isr-cta span::after,
.isr-cta:hover span::after { transform: scaleX(1); }
.isr-cta i {
    transition: transform var(--isr-speed) var(--isr-ease);
}
.isr-card:hover .isr-cta i,
.isr-card:focus-within .isr-cta i,
.isr-cta:hover i { transform: translateX(6px); }

.isr-ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(21, 94, 239, 0.22);
    transform: scale(0);
    animation: isr-ripple 620ms ease-out;
    pointer-events: none;
}
@keyframes isr-ripple {
    to { transform: scale(1); opacity: 0; }
}

/* --- Scroll reveal --- */
[data-reveal] {
    opacity: 0;
    transition:
        opacity 700ms var(--isr-ease),
        transform 700ms var(--isr-ease),
        filter 700ms var(--isr-ease);
    transition-delay: var(--isr-delay, 0ms);
}
[data-reveal="fade-up"] { transform: translateY(30px); }
[data-reveal="slide-up"] { transform: translateY(52px); }
[data-reveal="scale"] { transform: scale(0.92); }
[data-reveal="blur"] { filter: blur(14px); transform: translateY(16px); }
[data-reveal].isr-visible {
    opacity: 1;
    transform: none;
    filter: blur(0);
}

/* --- Roadmap --- */
.isr-roadmap-track {
    --isr-circle-size: 84px;
    position: relative;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0;
}
.isr-roadmap-line {
    position: absolute;
    top: calc(var(--isr-circle-size) / 2 - 2px);
    left: 10%;
    right: 10%;
    height: 4px;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.08);
    overflow: hidden;
    z-index: 0;
}
.isr-roadmap-line-fill {
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--isr-primary), var(--isr-accent));
    border-radius: inherit;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 1.7s var(--isr-ease);
}
.isr-roadmap-track.isr-visible .isr-roadmap-line-fill { transform: scaleX(1); }

.isr-roadmap-step {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 0 14px;
}
.isr-roadmap-circle {
    width: var(--isr-circle-size);
    height: var(--isr-circle-size);
    border-radius: 50%;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--isr-primary), var(--isr-secondary));
    color: #fff;
    font-size: 1.8rem;
    font-weight: 800;
    box-shadow: 0 0 0 6px rgba(21, 94, 239, 0.12), 0 20px 40px rgba(21, 94, 239, 0.28);
    transition: transform var(--isr-speed) var(--isr-ease), box-shadow var(--isr-speed) var(--isr-ease);
}
.isr-roadmap-step:hover .isr-roadmap-circle {
    transform: scale(1.08);
    box-shadow: 0 0 0 10px rgba(0, 194, 255, 0.2), 0 26px 54px rgba(21, 94, 239, 0.38);
}
.isr-roadmap-card {
    margin-top: 22px;
    width: 100%;
    background: var(--isr-card-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--isr-border);
    border-radius: 20px;
    padding: 26px 20px;
    box-shadow: var(--isr-shadow-soft);
    transition: transform var(--isr-speed) var(--isr-ease), box-shadow var(--isr-speed) var(--isr-ease), border-color var(--isr-speed) var(--isr-ease);
}
.isr-roadmap-step:hover .isr-roadmap-card {
    transform: translateY(-8px);
    box-shadow: var(--isr-shadow-hover);
    border-color: rgba(21, 94, 239, 0.28);
}
.isr-roadmap-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: grid;
    place-items: center;
    margin: 0 auto 16px;
    color: var(--isr-primary);
    background: linear-gradient(135deg, rgba(21, 94, 239, 0.14), rgba(0, 194, 255, 0.16));
    font-size: 18px;
    transition: transform var(--isr-speed) var(--isr-ease);
}
.isr-roadmap-step:hover .isr-roadmap-icon { transform: scale(1.1); }
.isr-roadmap-card h3 {
    color: var(--isr-text);
    font-size: 20px;
    font-weight: 700;
    margin: 0 0 10px;
}
.isr-roadmap-card p {
    color: var(--isr-muted);
    font-size: 15px;
    line-height: 1.6;
    margin: 0;
}

/* --- Responsive --- */
@media (max-width: 1180px) {
    .isr-card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
    .isr-roadmap-track { grid-template-columns: 1fr; gap: 36px; }
    .isr-roadmap-line {
        top: 0;
        bottom: 0;
        left: calc(var(--isr-circle-size) / 2);
        right: auto;
        width: 4px;
        height: auto;
        transform: translateX(-50%);
    }
    .isr-roadmap-line-fill { transform: scaleY(0); transform-origin: top center; }
    .isr-roadmap-track.isr-visible .isr-roadmap-line-fill { transform: scaleY(1); }
    .isr-roadmap-step {
        flex-direction: row;
        align-items: flex-start;
        text-align: left;
        gap: 24px;
        padding: 0;
    }
    .isr-roadmap-circle {
        position: relative;
        z-index: 2;
        flex: 0 0 var(--isr-circle-size);
    }
    .isr-roadmap-card {
        flex: 1 1 0;
        width: auto;
        min-width: 0;
        margin-top: 0;
    }
}
@media (max-width: 820px) {
    .isr-section { padding: 88px 0; }
    .isr-card-grid { grid-template-columns: 1fr; }
    .isr-heading { margin-bottom: 44px; }
    .isr-card-inner { padding: 32px 28px; }
}
@media (max-width: 480px) {
    .isr-roadmap-track { --isr-circle-size: 64px; }
    .isr-roadmap-step { gap: 18px; }
    .isr-roadmap-circle { font-size: 1.4rem; }
}

@media (prefers-reduced-motion: reduce) {
    [data-reveal] { opacity: 1 !important; transform: none !important; filter: none !important; transition: none !important; }
    .isr-orb, .isr-bg-mesh, .isr-card-border { animation: none !important; }
    .isr-card, .isr-roadmap-circle, .isr-roadmap-card, .isr-icon-box, .isr-roadmap-icon, .isr-cta i {
        transition-duration: 1ms !important;
    }
    .isr-card {
        --isr-scroll-x: 0px !important;
        --isr-scroll-y: 0px !important;
        --isr-scroll-scale: 1 !important;
        --isr-scroll-opacity: 1 !important;
        --isr-rotate-x: 0deg !important;
        --isr-rotate-y: 0deg !important;
    }
    .isr-roadmap-line-fill { transition: none !important; transform: none !important; }
}