:root {
    --paper: #f8f5e8;
    --paper-shadow: #efe9d0;
    --rule: #dbe5f0;
    --ink: #1f2c36;
    --ink-muted: #5a6772;
    --accent: #2b5d87;
    --accent-strong: #153852;
    --margin-line: #b8473d;
    --margin-line-soft: rgba(184, 71, 61, 0.2);
    --margin-line-soft-mobile: rgba(184, 71, 61, 0.18);
    --card: #fdfbf2;
    --edge: #cad3dd;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0 auto;
    padding: 52px 22px 70px;
    max-width: 980px;
    min-height: 100vh;
    color: var(--ink);
    font-family: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
    line-height: 1.6;
    background-color: var(--paper);
    background-image:
        linear-gradient(to right, transparent 0 74px, var(--margin-line-soft) 74px 76px, transparent 76px 100%),
        repeating-linear-gradient(to bottom, transparent 0 35px, var(--rule) 35px 36px);
    box-shadow: inset 0 0 40px var(--paper-shadow);
}

nav ul, footer ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

nav {
    margin: 0 0 30px;
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

nav ul li a {
    display: inline-block;
    padding: 8px 12px;
    border: 1px solid var(--edge);
    background: var(--card);
    color: var(--accent-strong);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    font-weight: 700;
    font-size: 0.85rem;
    text-decoration: none;
}

nav ul li a:hover {
    border-color: var(--accent);
    background: #eef4fa;
}

a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}

a:hover {
    color: var(--accent-strong);
}

h1, h2, h3 {
    color: var(--accent-strong);
    line-height: 1.2;
    margin: 26px 0 12px;
}

h1 {
    font-size: clamp(2rem, 4.8vw, 3rem);
    margin-top: 10px;
}

h2 {
    font-size: clamp(1.3rem, 3.2vw, 1.8rem);
}

h3 {
    font-size: clamp(1.1rem, 2.6vw, 1.35rem);
}

p, li, label, input, button {
    font-size: 1rem;
}

p {
    margin: 0 0 14px;
    color: var(--ink);
}

ul, ol {
    margin: 0 0 18px 24px;
    padding: 0;
}

li {
    margin: 4px 0;
}

code {
    padding: 0 4px;
    border-radius: 3px;
    background: #edf2f6;
    color: #163c59;
}

table {
    border-collapse: collapse;
    width: 100%;
    margin: 10px 0;
}

th, td {
    border: 1px solid var(--edge);
    padding: 6px 8px;
}

input, button {
    font-family: inherit;
    border: 1px solid #9eaaba;
    background: #fff;
    color: var(--ink);
    padding: 6px 8px;
}

input:focus, button:focus {
    outline: 2px solid rgba(43, 93, 135, 0.35);
    outline-offset: 1px;
}

button {
    background: #e7edf4;
    cursor: pointer;
    font-weight: 700;
}

button:hover {
    background: #dbe7f3;
}

canvas, img {
    border: 1px solid var(--edge);
    background: #fff;
}

figure {
    margin: 24px 0;
}

figcaption {
    color: var(--ink-muted);
    margin-top: 8px;
}

footer {
    margin-top: 36px;
    padding-top: 16px;
    border-top: 1px solid var(--edge);
    font-size: 0.9rem;
}

footer ul {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

ul.posts {
    margin: 20px 0 40px;
}

ul.posts li {
    list-style: none;
    margin: 0 0 10px;
    padding: 10px 12px;
    border-left: 3px solid var(--accent);
    background: rgba(255, 255, 255, 0.5);
}

@media (max-width: 720px) {
    body {
        padding: 28px 14px 44px;
        background-image:
            linear-gradient(to right, transparent 0 38px, var(--margin-line-soft-mobile) 38px 40px, transparent 40px 100%),
            repeating-linear-gradient(to bottom, transparent 0 31px, var(--rule) 31px 32px);
    }

    nav ul li a {
        font-size: 0.8rem;
        padding: 7px 9px;
    }
}