:root {
    --bg-deep: #050508;
    --bg-card: rgba(18, 18, 24, 0.55);
    --border: rgba(255, 255, 255, 0.08);
    --text: #e8e6ed;
    --muted: #8b8798;
    --eyebrow-bg: rgba(255, 255, 255, 0.03);
    --arrow-bg: rgba(255, 255, 255, 0.06);
    --nav-pill-bg: rgba(255, 255, 255, 0.03);
    --card-shadow-hover: 0 24px 48px -16px rgba(0, 0, 0, 0.5);
    --h1-em-1: #c4b5fd;
    --h1-em-2: #f472b6;
    --h1-em-3: #fcd34d;
}

html[data-theme="light"] {
    --bg-deep: #f3f0fb;
    --bg-card: rgba(255, 255, 255, 0.78);
    --border: rgba(22, 18, 40, 0.1);
    --text: #161222;
    --muted: #5b5569;
    --eyebrow-bg: rgba(255, 255, 255, 0.75);
    --arrow-bg: rgba(22, 18, 40, 0.05);
    --nav-pill-bg: rgba(255, 255, 255, 0.7);
    --card-shadow-hover: 0 20px 44px -14px rgba(22, 18, 40, 0.14);
    --h1-em-1: #6366f1;
    --h1-em-2: #db2777;
    --h1-em-3: #d97706;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Syne", system-ui, sans-serif;
    color: var(--text);
    background-color: var(--bg-deep);
    overflow-x: hidden;
}

/* Ambient mesh */
.mesh {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 80% 50% at 20% -10%, rgba(99, 102, 241, 0.35), transparent 55%),
        radial-gradient(ellipse 60% 40% at 90% 10%, rgba(236, 72, 153, 0.2), transparent 50%),
        radial-gradient(ellipse 50% 60% at 50% 100%, rgba(34, 197, 94, 0.12), transparent 45%),
        var(--bg-deep);
}

html[data-theme="light"] .mesh {
    background:
        radial-gradient(ellipse 82% 52% at 18% -12%, rgba(99, 102, 241, 0.14), transparent 58%),
        radial-gradient(ellipse 62% 42% at 92% 8%, rgba(236, 72, 153, 0.1), transparent 52%),
        radial-gradient(ellipse 52% 62% at 50% 102%, rgba(34, 197, 94, 0.08), transparent 46%),
        var(--bg-deep);
}

.noise {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

html[data-theme="light"] .noise {
    opacity: 0.022;
}

.wrap {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: clamp(1.5rem, 4vw, 3rem) clamp(1.25rem, 3vw, 2rem) 4rem;
}

.site-top {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 0.5rem;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-family: "Syne", system-ui, sans-serif;
    font-size: 0.68rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    padding: 0.45rem 0.75rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: var(--nav-pill-bg);
    cursor: pointer;
    transition: border-color 0.25s, color 0.25s, background 0.25s, transform 0.2s;
}

.theme-toggle:hover {
    color: var(--text);
    border-color: rgba(165, 180, 252, 0.35);
    transform: translateY(-1px);
}

html[data-theme="light"] .theme-toggle:hover {
    border-color: rgba(67, 56, 202, 0.35);
}

.theme-toggle:focus-visible {
    outline: 2px solid #a5b4fc;
    outline-offset: 2px;
}

html[data-theme="light"] .theme-toggle:focus-visible {
    outline-color: #4338ca;
}

.theme-toggle__icon {
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: linear-gradient(145deg, #f472b6, #fcd34d 55%, #a5b4fc);
    box-shadow: 0 0 0 2px var(--border);
}

html[data-theme="light"] .theme-toggle__icon {
    background: linear-gradient(145deg, #4338ca, #818cf8 50%, #fbbf24);
}

header {
    text-align: center;
    margin-bottom: clamp(2.5rem, 6vw, 4rem);
    animation: rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    opacity: 0;
}

@keyframes rise {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.eyebrow {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--eyebrow-bg);
}

h1 {
    font-family: "Instrument Serif", Georgia, serif;
    font-weight: 400;
    font-size: clamp(2.75rem, 8vw, 4.5rem);
    line-height: 1.05;
    margin: 0 0 1rem;
    letter-spacing: -0.02em;
}

h1 em {
    font-style: italic;
    background: linear-gradient(135deg, var(--h1-em-1), var(--h1-em-2), var(--h1-em-3));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.lead {
    font-size: clamp(1rem, 2.2vw, 1.15rem);
    font-weight: 500;
    color: var(--muted);
    max-width: 32rem;
    margin: 0 auto;
    line-height: 1.65;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
    gap: 1.25rem;
}

.card {
    --card-accent: #6366f1;
    position: relative;
    display: flex;
    flex-direction: column;
    padding: 1.5rem 1.5rem 1.35rem;
    border-radius: 1.25rem;
    text-decoration: none;
    color: inherit;
    background: var(--bg-card);
    border: 1px solid var(--border);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition:
        transform 0.45s cubic-bezier(0.22, 1, 0.36, 1),
        border-color 0.35s ease,
        box-shadow 0.45s ease;
    animation: card-in 0.7s cubic-bezier(0.22, 1, 0.36, 1) backwards;
}

.card:nth-child(1) { animation-delay: 0.05s; }
.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.15s; }
.card:nth-child(4) { animation-delay: 0.2s; }
.card:nth-child(5) { animation-delay: 0.25s; }
.card:nth-child(6) { animation-delay: 0.3s; }
.card:nth-child(7) { animation-delay: 0.35s; }

@keyframes card-in {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.card::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(
        145deg,
        color-mix(in srgb, var(--card-accent) 50%, transparent),
        transparent 40%,
        transparent 60%,
        color-mix(in srgb, var(--card-accent) 25%, transparent)
    );
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
    opacity: 0.5;
    transition: opacity 0.35s ease;
}

.card:hover {
    transform: translateY(-6px);
    border-color: color-mix(in srgb, var(--card-accent) 45%, var(--border));
    box-shadow:
        var(--card-shadow-hover),
        0 0 0 1px color-mix(in srgb, var(--card-accent) 20%, transparent),
        0 0 60px -20px color-mix(in srgb, var(--card-accent) 35%, transparent);
}

.card:hover::before {
    opacity: 1;
}

.card:focus-visible {
    outline: 2px solid var(--card-accent);
    outline-offset: 3px;
}

.card-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.icon {
    font-size: 2rem;
    line-height: 1;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.35));
}

html[data-theme="light"] .icon {
    filter: drop-shadow(0 3px 10px rgba(22, 18, 40, 0.12));
}

.arrow {
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--arrow-bg);
    border: 1px solid var(--border);
    color: var(--muted);
    transition: background 0.3s, color 0.3s, transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

.card:hover .arrow {
    background: color-mix(in srgb, var(--card-accent) 22%, transparent);
    color: var(--text);
    transform: translate(3px, -3px);
}

.arrow svg {
    width: 14px;
    height: 14px;
}

.card h2 {
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    letter-spacing: -0.02em;
}

.card p {
    margin: 0;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--muted);
    line-height: 1.55;
    flex: 1;
}

.card-accent-bar {
    margin-top: 1.25rem;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--card-accent), transparent);
    opacity: 0.65;
    transition: opacity 0.3s;
}

.card:hover .card-accent-bar {
    opacity: 1;
}

footer {
    margin-top: 3.5rem;
    text-align: center;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--muted);
    letter-spacing: 0.06em;
}

@media (prefers-reduced-motion: reduce) {
    .card,
    header {
        animation: none;
        opacity: 1;
        transform: none;
    }
    .card:hover {
        transform: none;
    }
    html {
        scroll-behavior: auto;
    }
}