:root {
    --paper: #eaf2ee;
    --ink: #1d1b2e;
    --violet: #5a3ec8;
    --marker: #ffd84d;
    --white: #ffffff;
    --muted: #4d4a63;

    --font-body: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
    --font-hand: "Caveat", "Comic Sans MS", cursive;

    --radius: 14px;
    --max-width: 62rem;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 5rem;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1.125rem;
    line-height: 1.6;
}

img {
    display: block;
    max-width: 100%;
}

a {
    color: var(--violet);
}

a:focus-visible {
    outline: 3px solid var(--violet);
    outline-offset: 3px;
}

/*  Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem 2rem;
    padding: 0.9rem clamp(1rem, 5vw, 3rem);
    background: var(--paper);
    border-bottom: 2px solid var(--ink);
}

.brand {
    color: var(--ink);
    font-weight: 800;
    font-size: 1.2rem;
    text-decoration: none;
}

.site-header nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1.5rem;
}

.site-header nav a {
    color: var(--ink);
    font-weight: 700;
    text-decoration: none;
    background: linear-gradient(var(--marker), var(--marker)) no-repeat 0 100% / 0 45%;
    transition: background-size 0.2s ease;
}

.site-header nav a:hover,
.site-header nav a:focus-visible {
    background-size: 100% 45%;
}

/* Layout */
main {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 clamp(1rem, 5vw, 3rem);
}

.about {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
    gap: clamp(2rem, 6vw, 5rem);
    padding: clamp(3rem, 9vw, 6rem) 0;
}

.about h1 {
    margin: 0 0 1.25rem;
    font-size: clamp(2.4rem, 6vw, 4.2rem);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.02em;
}

.about p {
    max-width: 34rem;
    margin: 0 0 1rem;
    color: var(--muted);
}

/* Cat image */
.polaroid {
    margin: 0;
    padding: 0.9rem 0.9rem 0.6rem;
    background: var(--white);
    border: 2px solid var(--ink);
    box-shadow: 8px 8px 0 var(--ink);
    transition: transform 0.25s ease;
}

.polaroid:hover {
    transform: rotate(0deg);
}

.polaroid img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.polaroid figcaption {
    padding-top: 0.5rem;
    text-align: center;
    font-family: var(--font-hand);
    font-size: 1.7rem;
    line-height: 1.2;
}

/* Panels */
.panel {
    padding: clamp(2rem, 6vw, 3.5rem) 0;
    border-top: 2px solid var(--ink);
}

.panel h2 {
    display: inline-block;
    margin: 0 0 1.5rem;
    padding: 0 0.3em;
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    background: var(--marker);
}

/* Project cards */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
    gap: 1.5rem;
}

.card {
    padding: 1.5rem;
    background: var(--white);
    border: 2px solid var(--ink);
    border-radius: var(--radius);
}

.card h3 {
    margin: 0 0 0.5rem;
    font-size: 1.35rem;
}

.card p {
    margin: 0;
    color: var(--muted);
}

.card-empty {
    background: transparent;
    border-style: dashed;
}

/* Learning list */
.topics {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.topics li {
    padding: 0.4rem 1rem;
    background: var(--white);
    border: 2px solid var(--ink);
    border-radius: 999px;
    font-weight: 700;
}

/* Button */
.button {
    display: inline-block;
    margin-left: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: var(--violet);
    color: var(--white);
    border: 2px solid var(--ink);
    border-radius: var(--radius);
    box-shadow: 4px 4px 0 var(--ink);
    font-weight: 700;
    text-decoration: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.button:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--ink);
}

/* Footer */
.site-footer {
    padding: 2rem 1rem 3rem;
    text-align: center;
    color: var(--muted);
    border-top: 2px solid var(--ink);
}

.site-footer p {
    margin: 0;
}

/* Responsive */
@media (max-width: 720px) {
    .about {
        grid-template-columns: 1fr;
    }

    .polaroid {
        max-width: 20rem;
        margin: 0 auto;
    }

    .button {
        margin: 0.75rem 0 0;
    }
}

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

    * {
        transition: none !important;
    }
}