:root {
    --bg: #F7F7FB;
    --surface: #FFFFFF;
    --primary: #CDB4FF;
    --secondary: #A0E7E5;
    --highlight: #FFC8DD;
    --text-primary: #2D2D2D;
    --text-secondary: #6F6F7B;
    --shadow-soft: 0 10px 30px rgba(45, 45, 45, 0.08);
    --shadow-sm: 0 4px 12px rgba(45, 45, 45, 0.08);
    --radius-lg: 1.5rem;
    --radius-pill: 999px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: "Poppins", "SF Pro Rounded", "Segoe UI", sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: radial-gradient(circle at 20% 10%, rgba(205, 180, 255, 0.25), transparent 45%),
        radial-gradient(circle at 80% 0%, rgba(160, 231, 229, 0.35), transparent 40%),
        var(--bg);
}

h1,
h2,
p,
ul {
    margin: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

.skip-link {
    position: absolute;
    top: -2.5rem;
    left: 1rem;
    padding: 0.5rem 0.8rem;
    border-radius: 0.5rem;
    background: var(--text-primary);
    color: #fff;
    z-index: 100;
}

.skip-link:focus {
    top: 1rem;
}

.container {
    width: min(68rem, 100% - 2rem);
    margin-inline: auto;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    backdrop-filter: blur(10px);
    background: rgba(247, 247, 251, 0.82);
    border-bottom: 1px solid rgba(45, 45, 45, 0.08);
}

.top-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(68rem, 100% - 2rem);
    margin-inline: auto;
    padding: 0.75rem 0;
}

.logo {
    font-weight: 700;
    letter-spacing: 0.02em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 0.75rem;
    padding: 0;
    font-size: 0.9rem;
}

.nav-links a {
    color: var(--text-secondary);
    padding: 0.35rem 0.7rem;
    border-radius: var(--radius-pill);
    transition: background-color 200ms ease, color 200ms ease;
}

.nav-links a:hover,
.nav-links a:focus-visible {
    background: rgba(205, 180, 255, 0.25);
    color: var(--text-primary);
}

.section {
    padding: 3.2rem 0;
}

.hero {
    padding-top: 4rem;
}

.eyebrow {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 0.9rem;
}

h1 {
    font-size: clamp(1.9rem, 8vw, 3.2rem);
    line-height: 1.2;
    margin-bottom: 1rem;
}

h2 {
    font-size: clamp(1.5rem, 5.5vw, 2.3rem);
    line-height: 1.25;
    margin-bottom: 0.85rem;
}

.lead,
.section-copy {
    color: var(--text-secondary);
    max-width: 66ch;
}

.section-copy + .section-copy {
    margin-top: 0.9rem;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.6rem;
}

.btn {
    border: 0;
    border-radius: var(--radius-pill);
    padding: 0.72rem 1.2rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 180ms ease, box-shadow 180ms ease, background-color 180ms ease;
}

.btn:hover,
.btn:focus-visible {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.btn-primary {
    background: linear-gradient(145deg, var(--primary), #dbc8ff);
    color: var(--text-primary);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid rgba(45, 45, 45, 0.12);
}

.playground-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 1.3rem;
}

.sound-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: var(--text-secondary);
    font-size: 0.92rem;
}

.sound-toggle input {
    inline-size: 1.05rem;
    block-size: 1.05rem;
    accent-color: var(--primary);
}

.playground-stage {
    position: relative;
    margin-top: 1rem;
    min-height: 23rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.72));
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(45, 45, 45, 0.09);
    touch-action: none;
}

.blob {
    position: absolute;
    border-radius: 999px;
    filter: blur(0.4px);
    pointer-events: none;
    transition: transform 250ms ease-out;
}

.blob-a {
    width: 8rem;
    height: 8rem;
    left: -1.5rem;
    top: -1.1rem;
    background: rgba(205, 180, 255, 0.5);
}

.blob-b {
    width: 7rem;
    height: 7rem;
    right: 4%;
    top: 12%;
    background: rgba(160, 231, 229, 0.45);
}

.blob-c {
    width: 9rem;
    height: 9rem;
    left: 32%;
    bottom: -2rem;
    background: rgba(255, 200, 221, 0.42);
}

.shape {
    position: absolute;
    display: grid;
    place-items: center;
    width: 4.4rem;
    height: 4.4rem;
    border: 0;
    border-radius: 1.4rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    user-select: none;
    transform: translate(-50%, -50%);
    touch-action: none;
    box-shadow: 0 8px 18px rgba(45, 45, 45, 0.16);
}

.shape-click {
    background: linear-gradient(155deg, rgba(205, 180, 255, 0.95), rgba(255, 200, 221, 0.95));
}

.shape-drag {
    background: linear-gradient(155deg, rgba(160, 231, 229, 0.95), rgba(205, 180, 255, 0.75));
    cursor: grab;
}

.shape-drag.is-dragging {
    cursor: grabbing;
    box-shadow: 0 12px 24px rgba(45, 45, 45, 0.22);
}

.shape.bounce {
    animation: bounce 420ms cubic-bezier(0.2, 0.85, 0.35, 1);
}

.ripple {
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 2px solid rgba(255, 255, 255, 0.85);
    animation: ripple 420ms ease-out;
    pointer-events: none;
}

.feature-list {
    margin-top: 1.2rem;
    padding-left: 1.2rem;
    color: var(--text-secondary);
    display: grid;
    gap: 0.45rem;
}

.cta-inner {
    background: linear-gradient(145deg, rgba(205, 180, 255, 0.28), rgba(160, 231, 229, 0.3));
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    border: 1px solid rgba(45, 45, 45, 0.08);
}

.site-footer {
    padding: 2.4rem 0 1rem;
}

.footer-grid {
    display: grid;
    gap: 1.3rem;
    border-top: 1px solid rgba(45, 45, 45, 0.1);
    padding-top: 1.6rem;
}

.footer-logo {
    font-weight: 700;
}

.footer-tagline,
.copyright,
.footer-links a {
    color: var(--text-secondary);
}

.footer-links {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem 1.2rem;
}

.copyright {
    text-align: center;
    margin-top: 1.4rem;
    font-size: 0.86rem;
}

@keyframes bounce {
    0% { transform: translate(-50%, -50%) scale(1); }
    45% { transform: translate(-50%, -50%) scale(1.13); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

@keyframes ripple {
    from {
        transform: scale(0.3);
        opacity: 0.9;
    }
    to {
        transform: scale(1.4);
        opacity: 0;
    }
}

@media (min-width: 48rem) {
    .section {
        padding: 4.4rem 0;
    }

    .nav-links {
        gap: 1.1rem;
    }

    .playground-stage {
        min-height: 26rem;
    }

    .shape {
        width: 5rem;
        height: 5rem;
        font-size: 0.95rem;
    }

    .footer-grid {
        grid-template-columns: 1.2fr 1fr 1fr;
        align-items: start;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 1ms !important;
    }
}