/* --- FONTS IMPORT --- */
@import url("https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600&family=Unbounded:wght@300;500;700;900&display=swap");

/* --- TECH FUTURE VARIABLES --- */
:root {
    --font-heading: "Unbounded", sans-serif;
    --font-body: "Manrope", sans-serif;

    /* Palette */
    --color-ink: #1a1a2e;
    --color-ink-sub: #5f6388;
    --color-accent-start: #8b5cf6;
    --color-accent-end: #6d28d9;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.45);
    --glass-border: 1px solid rgba(255, 255, 255, 0.6);
    --glass-shadow: 0px 20px 40px rgba(139, 92, 246, 0.15);
    --glass-blur: blur(20px);

    /* Nav height */
    --nav-h: 68px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-body);
    color: var(--color-ink);
    background-image: url("../images/background.png");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

html.lenis,
html.lenis body {
    height: auto;
}

.lenis.lenis-smooth {
    scroll-behavior: auto !important;
}

.lenis.lenis-stopped {
    overflow: clip;
}

.lenis.lenis-smooth [data-lenis-prevent] {
    overscroll-behavior: contain;
}

.noise-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    opacity: 0.07;
    filter: url(#noiseFilter);
    mix-blend-mode: soft-light;
}

/* Grid background */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(124, 58, 237, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    pointer-events: none;
}

/* Big watermark */
body::after {
    content: "THEORY";
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-heading);
    font-size: clamp(100px, 25vw, 400px);
    font-weight: 900;
    background: linear-gradient(
        135deg,
        rgba(124, 58, 237, 0.05) 0%,
        rgba(59, 130, 246, 0.05) 100%
    );
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.05em;
    z-index: 0;
    pointer-events: none;
    user-select: none;
}

/* --- FLOATING ORBS --- */
.floating-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    pointer-events: none;
    z-index: 0;
    will-change: transform;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(
        circle,
        rgba(139, 92, 246, 0.6) 0%,
        rgba(124, 58, 237, 0.1) 70%
    );
    top: -200px;
    left: -200px;
    animation: float1 20s ease-in-out infinite;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(
        circle,
        rgba(59, 130, 246, 0.5) 0%,
        rgba(37, 99, 235, 0.1) 70%
    );
    bottom: -150px;
    right: -150px;
    animation: float2 15s ease-in-out infinite;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(
        circle,
        rgba(236, 72, 153, 0.4) 0%,
        rgba(219, 39, 119, 0.1) 70%
    );
    top: 40%;
    right: 5%;
    animation: float3 25s ease-in-out infinite;
}

@keyframes float1 {
    0%,
    100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(60px, 100px);
    }
}
@keyframes float2 {
    0%,
    100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-80px, -60px);
    }
}
@keyframes float3 {
    0%,
    100% {
        transform: translate(0, 0);
    }
    50% {
        transform: translate(-50px, 80px);
    }
}

/* =============================================================================
   NAVIGATION
   ============================================================================= */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    transition:
        background 0.3s ease,
        box-shadow 0.3s ease;
}

.site-nav.scrolled {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: var(--glass-border);
    box-shadow: var(--glass-shadow);
}

.nav-inner {
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 18px;
    color: var(--color-ink);
    text-decoration: none;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 15px;
    color: var(--color-ink);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--color-accent-start);
}

.nav-link.nav-cta {
    font-family: var(--font-heading);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    background: var(--color-ink);
    padding: 12px 28px;
    border-radius: 100px;
    transition:
        background 0.3s ease,
        transform 0.2s ease;
}

.nav-link.nav-cta:hover {
    background: var(--color-accent-start);
    color: white;
    transform: translateY(-1px);
}

/* Hamburger */
.nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-ink);
    border-radius: 2px;
    transition: all 0.3s ease;
    transform-origin: center;
}

.nav-burger.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.nav-burger.is-open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.nav-burger.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* =============================================================================
   CONTAINER
   ============================================================================= */
.container {
    position: relative;
    z-index: 1;
    padding-top: calc(var(--nav-h) + 40px);
    padding-bottom: 80px;
    max-width: 1200px;
}

/* =============================================================================
   SCROLL REVEAL
   ============================================================================= */
[data-reveal] {
    opacity: 0;
    transform: translateY(32px);
    transition:
        opacity 0.6s ease,
        transform 0.6s ease;
    will-change: opacity, transform;
}

[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered delays for feature cards */
[data-reveal-delay="0"] {
    transition-delay: 0ms;
}
[data-reveal-delay="1"] {
    transition-delay: 80ms;
}
[data-reveal-delay="2"] {
    transition-delay: 160ms;
}
[data-reveal-delay="3"] {
    transition-delay: 240ms;
}

/* =============================================================================
   HERO CARD
   ============================================================================= */
.hero-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 40px;
    padding: 100px 60px;
    text-align: center;
    box-shadow: var(--glass-shadow);
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
}

.hero-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 100%;
    background: linear-gradient(
        105deg,
        transparent 20%,
        rgba(255, 255, 255, 0.4) 25%,
        transparent 30%
    );
    transform: skewX(-20deg) translateX(-150%);
    transition: 0.5s;
    pointer-events: none;
}
.hero-card:hover::before {
    transform: skewX(-20deg) translateX(150%);
    transition: 1.5s;
}

.logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 20px;
    letter-spacing: 1px;
    margin-bottom: 32px;
    display: inline-block;
    color: var(--color-ink);
}

.tagline {
    font-family: var(--font-body);
    color: var(--color-accent-start);
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 32px;
    display: inline-block;
    padding: 8px 20px;
    background: #fff;
    border-radius: 100px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(48px, 8vw, 110px);
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.04em;
    margin-bottom: 32px;
    text-transform: uppercase;
    background-image: linear-gradient(180deg, #0f172a 0%, #475569 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-line {
    display: block;
    overflow: hidden;
}

.hero-char {
    display: inline-block;
    will-change: transform, opacity;
}

.hero-word {
    display: inline-block;
    will-change: transform, opacity;
}

.hero-subtitle {
    font-family: var(--font-body);
    color: var(--color-ink-sub);
    font-size: 20px;
    font-weight: 500;
    max-width: 600px;
    margin: 0 auto 48px;
    line-height: 1.6;
}

.cta-button {
    font-family: var(--font-heading);
    font-size: 16px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: white;
    background: var(--color-ink);
    border: none;
    padding: 24px 56px;
    border-radius: 100px;
    cursor: pointer;
    box-shadow: 0 20px 40px -10px rgba(15, 23, 42, 0.4);
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    position: relative;
    overflow: hidden;
    isolation: isolate;
    will-change: transform;
}

.cta-button::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #6366f1, #a855f7, #ec4899);
    opacity: 0;
    transition: 0.4s;
    z-index: -1;
}

.cta-button:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: 0 30px 60px -12px rgba(99, 102, 241, 0.5);
}
.cta-button:hover::before {
    opacity: 1;
}
.cta-button:active {
    transform: translateY(-1px);
}

/* =============================================================================
   STATS BAR
   ============================================================================= */
.stats-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 24px;
    padding: 28px 40px;
    margin-bottom: 80px;
    box-shadow: var(--glass-shadow);
    flex-wrap: wrap;
}

.stat-item {
    flex: 1;
    min-width: 140px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-value {
    font-family: var(--font-heading);
    font-size: clamp(14px, 2vw, 20px);
    font-weight: 700;
    color: var(--color-ink);
    letter-spacing: -0.02em;
}

.stat-label {
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-ink-sub);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: rgba(139, 92, 246, 0.2);
    margin: 0 32px;
    flex-shrink: 0;
}

/* =============================================================================
   FEATURES GRID
   ============================================================================= */
.feature-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 32px;
    padding: 32px;
    height: 100%;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    position: relative;
    overflow: hidden;
    will-change: transform;
}

.feature-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.65);
    box-shadow: 0 25px 50px rgba(139, 92, 246, 0.2);
    border-color: white;
}

.feature-icon {
    width: 64px;
    height: 64px;
    background: white;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    box-shadow: 0 10px 20px rgba(139, 92, 246, 0.1);
    color: var(--color-accent-end);
    font-size: 28px;
    transition: all 0.3s ease;
    will-change: transform;
}

.feature-card:hover .feature-icon {
    background: linear-gradient(
        135deg,
        var(--color-accent-start),
        var(--color-accent-end)
    );
    color: white;
    transform: scale(1.1) rotate(5deg);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: 18px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.3;
    margin: 0;
    width: 100%;
}

.feature-card::after {
    content: "→";
    position: absolute;
    bottom: 32px;
    right: 32px;
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--color-accent-start);
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}
.feature-card:hover::after {
    opacity: 1;
    transform: translateX(0);
}

.section-heading {
    font-family: var(--font-heading);
    font-size: clamp(34px, 5vw, 56px);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 28px;
    text-transform: uppercase;
}

.features-section {
    margin-top: 100px;
}

.features-pin {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 40px;
    padding: 34px;
    box-shadow: var(--glass-shadow);
    overflow: visible;
    position: relative;
}

.features-track {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    width: 100%;
    min-height: auto;
}

.bento-card {
    width: auto;
    min-height: 260px;
    margin: 0;
}

.bento-card--wide {
    grid-column: span 2;
}

.bento-card--wide .feature-icon {
    width: 74px;
    height: 74px;
    font-size: 32px;
    margin-bottom: 26px;
}

.bento-card--wide .feature-title {
    font-size: 24px;
}

.feature-description {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-ink-sub);
    max-width: 90%;
}

.features-scroll-hint {
    position: absolute;
    right: 24px;
    bottom: 20px;
    display: none;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(109, 40, 217, 0.2);
    border-radius: 999px;
    padding: 8px 14px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-ink-sub);
}

@media (hover: hover) and (pointer: fine) {
    body {
        cursor: none;
    }

    .cursor-dot,
    .cursor-ring {
        position: fixed;
        left: 0;
        top: 0;
        pointer-events: none;
        z-index: 2000;
        opacity: 0;
        transition: opacity 0.2s ease;
    }

    .cursor-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: rgba(109, 40, 217, 0.95);
    }

    .cursor-ring {
        width: 34px;
        height: 34px;
        border-radius: 50%;
        border: 1px solid rgba(109, 40, 217, 0.5);
        background: rgba(109, 40, 217, 0.08);
        transition:
            opacity 0.2s ease,
            width 0.25s ease,
            height 0.25s ease,
            border-color 0.25s ease,
            background 0.25s ease;
    }

    .cursor-ring.is-hover {
        width: 54px;
        height: 54px;
        border-color: rgba(109, 40, 217, 0.75);
        background: rgba(109, 40, 217, 0.16);
    }
}

.is-magnetic {
    will-change: transform;
}

/* =============================================================================
   SCREENSHOTS & CAROUSEL
   ============================================================================= */
.screenshots-section {
    margin-top: 100px;
    margin-bottom: 60px;
}

.screenshots-title {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 800;
    color: var(--color-ink);
    text-align: center;
    margin-bottom: 60px;
    text-transform: uppercase;
    letter-spacing: -0.03em;
}

.carousel-container {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 40px;
    padding: 60px 0;
    box-shadow: var(--glass-shadow);
    position: relative;
    overflow: hidden;
}

.carousel-track {
    display: flex;
    gap: 30px;
    width: max-content;
    will-change: transform;
}

.carousel-wrapper {
    width: 100%;
    overflow: hidden;
    padding: 40px 0;
    position: relative;
}

.carousel-slide {
    min-width: 320px;
    height: 600px;
    border-radius: 24px;
    overflow: hidden;
    position: relative;
    background: white;
    border: 4px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
    transition: transform 0.4s ease;
}

.carousel-slide::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        180deg,
        rgba(255, 255, 255, 0.1) 0%,
        transparent 40%,
        rgba(139, 92, 246, 0.1) 100%
    );
    pointer-events: none;
    z-index: 2;
}

.carousel-slide img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 10px;
}

.carousel-slide:not(.active-slide) img {
    filter: blur(2px);
    opacity: 0.6;
    transition: all 0.4s ease;
}

.carousel-slide.active-slide img {
    filter: blur(0);
    opacity: 1;
}

.carousel-slide.active-slide {
    transform: scale(1.05);
    border-color: var(--color-accent-start);
    box-shadow: 0 25px 60px rgba(124, 58, 237, 0.25);
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    color: var(--color-ink);
}

.carousel-arrow:hover {
    background: var(--color-ink);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-arrow.left {
    left: 40px;
}
.carousel-arrow.right {
    right: 40px;
}

.carousel-dots {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 40px;
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(139, 92, 246, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
}

.carousel-dot.active {
    background: var(--color-accent-start);
    transform: scale(1.3);
}

/* =============================================================================
   FOOTER
   ============================================================================= */
.footer {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    border: var(--glass-border);
    border-radius: 32px;
    padding: 40px;
    margin-top: 80px;
    text-align: center;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-contact a {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--color-ink);
    text-decoration: none;
    margin-right: 30px;
    font-size: 16px;
    transition: color 0.3s;
}
.footer-contact a:hover {
    color: var(--color-accent-start);
}

.footer-copyright {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 14px;
    color: var(--color-ink-sub);
    text-transform: uppercase;
}

/* =============================================================================
   MODAL
   ============================================================================= */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(26, 26, 46, 0.6);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-card {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid white;
    box-shadow: 0 40px 80px rgba(0, 0, 0, 0.2);
    border-radius: 40px;
    padding: 50px;
    text-align: center;
    max-width: 500px;
    width: 90%;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-card {
    transform: scale(1);
}

.modal-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 24px;
    color: var(--color-ink);
    transition: all 0.3s ease;
}
.modal-close:hover {
    background: var(--color-ink);
    color: white;
    transform: rotate(90deg);
}

.modal-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(
        135deg,
        var(--color-accent-start),
        var(--color-accent-end)
    );
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    color: white;
    font-size: 32px;
    box-shadow: 0 20px 40px rgba(124, 58, 237, 0.3);
}

.modal-title {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--color-ink);
}

.modal-description {
    font-size: 18px;
    line-height: 1.6;
    color: var(--color-ink-sub);
}

/* =============================================================================
   REDUCED MOTION
   ============================================================================= */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    [data-reveal] {
        opacity: 1;
        transform: none;
    }

    .floating-orb {
        animation: none;
    }
}

/* =============================================================================
   LOW POWER MODE
   ============================================================================= */
.low-power-mode .floating-orb,
.low-power-mode #canvas-container {
    display: none !important;
}

.low-power-mode * {
    animation: none !important;
    transition: none !important;
}

/* =============================================================================
   PRELOADER — neuron network
   ============================================================================= */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 99999;
    background: linear-gradient(135deg, #f8f7ff 0%, #ffffff 50%, #f0edff 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    /* grid pattern (same as body) */
    background-image:
        linear-gradient(135deg, #f8f7ff 0%, #ffffff 50%, #f0edff 100%),
        linear-gradient(rgba(124, 58, 237, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(124, 58, 237, 0.04) 1px, transparent 1px);
    transition:
        opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1),
        visibility 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

#preloader.preloader--out {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

#neuron-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

/* Glass card in centre */
.preloader-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    background: rgba(255, 255, 255, 0.55);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: 32px;
    padding: 44px 56px 40px;
    box-shadow: 0 20px 60px rgba(139, 92, 246, 0.15);
    pointer-events: none;
    animation: preloader-card-in 0.5s cubic-bezier(0.34, 1.56, 0.64, 1) both;
}

@keyframes preloader-card-in {
    from {
        opacity: 0;
        transform: scale(0.88) translateY(12px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.preloader-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(22px, 4vw, 32px);
    color: var(--color-ink);
    letter-spacing: 0.5px;
    margin-bottom: 10px;
}

.preloader-tagline {
    font-family: var(--font-body);
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent-start);
    margin-bottom: 28px;
}

/* Three bouncing dots */
.preloader-dots {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
}

.preloader-dots span {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-accent-start);
    animation: preloader-bounce 1.3s ease-in-out infinite;
}

.preloader-dots span:nth-child(2) {
    animation-delay: 0.18s;
}
.preloader-dots span:nth-child(3) {
    animation-delay: 0.36s;
}

@keyframes preloader-bounce {
    0%,
    80%,
    100% {
        transform: translateY(0) scale(0.7);
        opacity: 0.4;
    }
    40% {
        transform: translateY(-9px) scale(1);
        opacity: 1;
    }
}

/* =============================================================================
   FOCUS / A11Y
   ============================================================================= */
.carousel-arrow:focus-visible,
.carousel-dot:focus-visible,
.feature-card:focus-visible {
    outline: 3px solid var(--color-accent-start);
    outline-offset: 4px;
}

.cta-button:focus-visible {
    outline: 3px solid white;
    outline-offset: 4px;
}