:root {
    --bg: #0b0c10;
    --fg: #eaf2f1;
    --accent: #C5BAD4;
    --muted: #276CD3;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg: #f7f9fa;
        --fg: #0d1b2a;
        --muted: #276CD3;
    }
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
    background: var(--bg);
    color: var(--fg);
    display: grid;
    place-items: center;
}

.wrap {
    display: grid;
    place-items: center;
    gap: 1rem;
    text-align: center;
    padding: 2rem;
}

.logo {
    font-weight: 800;
    letter-spacing: .06em;
    text-transform: uppercase;
    font-size: clamp(2rem, 7vw, 3.25rem);
    line-height: 1.05;
    position: relative;
    animation: reveal .9s ease-out both;
    background: linear-gradient(90deg, var(--accent), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.loader {
    width: 56px;
    height: 56px;
    display: grid;
    place-items: center;
    position: relative;
    animation: fadein .4s ease-out .3s both;
}

/* Book-style loader */
.loader::before,
.loader::after {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 6px;
}

.loader::before {
    border: 3px solid var(--muted);
    opacity: .5;
}

.loader::after {
    width: 50%;
    height: 90%;
    left: 25%;
    top: 5%;
    background: var(--accent);
    border-radius: 4px;
    transform-origin: left center;
    animation: pageflip 1.1s ease-in-out infinite;
}

.tag {
    font-size: .95rem;
    color: var(--muted);
    margin: 0;
    animation: fadein .5s ease-out .35s both;
}

/* Animations */
@keyframes reveal {
    from {
        opacity: 0;
        transform: translateY(8px) scale(.98);
        filter: blur(4px);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

@keyframes fadein {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pageflip {
    0% {
        transform: rotateY(0deg);
        opacity: .95;
    }

    50% {
        transform: rotateY(-160deg);
        opacity: .85;
    }

    100% {
        transform: rotateY(-320deg);
        opacity: .95;
    }
}

/* Reduced motion: show instantly */
@media (prefers-reduced-motion: reduce) {

    .logo,
    .loader,
    .tag {
        animation: none !important;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 1px, 1px);
    white-space: nowrap;
    border: 0;
}