/* =========================================================================
   Jieung Kim — personal site
   Minimal-clean academic theme, light/dark. Vanilla CSS, no framework.
   ========================================================================= */

/* ---------- Design tokens ---------- */
:root {
    --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        "Helvetica Neue", Arial, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
    --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

    /* Light theme (default) */
    --bg: #ffffff;
    --bg-soft: #f7f8fa;
    --bg-elev: #ffffff;
    --text: #1a1d24;
    --text-muted: #5b6472;
    --border: #e7e9ee;
    --border-strong: #d7dae1;
    --accent: #2f57d8;
    --accent-hover: #1e3fb0;
    --accent-soft: #eef2fe;
    --accent-contrast: #ffffff;
    --shadow-sm: 0 1px 2px rgba(20, 25, 40, 0.05);
    --shadow-md: 0 6px 24px -8px rgba(20, 25, 40, 0.16);
    --radius: 14px;
    --radius-sm: 9px;
    --maxw: 960px;
    --nav-h: 62px;
}

:root[data-theme="dark"] {
    --bg: #0d1017;
    --bg-soft: #131822;
    --bg-elev: #161c27;
    --text: #e7ebf3;
    --text-muted: #98a2b3;
    --border: #232a37;
    --border-strong: #2e3746;
    --accent: #7d9bff;
    --accent-hover: #9db3ff;
    --accent-soft: #182236;
    --accent-contrast: #0d1017;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 10px 34px -12px rgba(0, 0, 0, 0.7);
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16.5px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    transition: background-color 0.25s ease, color 0.25s ease;
}

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

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s ease;
}

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

h1, h2, h3, h4, h5, h6 {
    line-height: 1.25;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.01em;
}

p {
    margin: 0 0 1rem;
}

::selection {
    background: var(--accent);
    color: var(--accent-contrast);
}

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 46px 0;
    border-top: 1px solid var(--border);
}

.section:first-of-type {
    border-top: none;
}

.section-title {
    font-size: 1.05rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    font-weight: 700;
    margin: 0 0 26px;
    display: flex;
    align-items: center;
    gap: 14px;
}

.section-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ---------- Navbar ---------- */
.nav {
    position: sticky;
    top: 0;
    z-index: 50;
    background: color-mix(in srgb, var(--bg) 82%, transparent);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
}

.nav__inner {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.nav__brand {
    font-weight: 800;
    font-size: 1.05rem;
    color: var(--text);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.nav__brand:hover {
    color: var(--text);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav__links a {
    display: inline-block;
    padding: 8px 12px;
    border-radius: 8px;
    color: var(--text-muted);
    font-weight: 500;
    font-size: 0.95rem;
    line-height: 1;
}

.nav__links a:hover {
    color: var(--text);
    background: var(--bg-soft);
}

.nav__links a.is-active {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav__links a.is-active:hover {
    color: var(--accent);
}

.ext-arrow::after {
    content: "\2197";
    font-size: 0.75em;
    margin-left: 2px;
    opacity: 0.7;
}

.nav__right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Theme toggle */
.theme-toggle {
    width: 38px;
    height: 38px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    background: var(--bg-elev);
    color: var(--text-muted);
    border-radius: 10px;
    cursor: pointer;
    padding: 0;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
}

.theme-toggle:hover {
    color: var(--accent);
    border-color: var(--border-strong);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

.theme-toggle .icon-sun {
    display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

/* Mobile menu button */
.nav__burger {
    display: none;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    background: var(--bg-elev);
    color: var(--text);
    border-radius: 10px;
    cursor: pointer;
    padding: 0;
}

.nav__burger svg {
    width: 20px;
    height: 20px;
}

/* ---------- Hero / profile ---------- */
.hero {
    padding: 56px 0 34px;
}

.hero__grid {
    display: grid;
    grid-template-columns: 210px 1fr;
    gap: 46px;
    align-items: center;
}

.hero__photo {
    position: relative;
}

.hero__photo img {
    width: 210px;
    height: 210px;
    object-fit: cover;
    border-radius: 22px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
}

.hero__name {
    font-size: clamp(2rem, 5vw, 2.7rem);
    font-weight: 800;
    margin: 0 0 6px;
    letter-spacing: -0.03em;
}

.hero__role {
    font-size: 1.12rem;
    color: var(--text-muted);
    margin: 0 0 4px;
}

.hero__role b,
.hero__role strong {
    color: var(--text);
    font-weight: 600;
}

.hero__tagline {
    margin: 14px 0 22px;
    color: var(--text-muted);
    max-width: 46ch;
}

.hero__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: center;
}

/* Buttons & chips */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.92rem;
    border: 1px solid transparent;
    cursor: pointer;
    line-height: 1;
    transition: transform 0.08s ease, background 0.15s, border-color 0.15s, color 0.15s;
}

.btn:active {
    transform: translateY(1px);
}

.btn--primary {
    background: var(--accent);
    color: var(--accent-contrast);
}

.btn--primary:hover {
    background: var(--accent-hover);
    color: var(--accent-contrast);
}

.btn--ghost {
    background: var(--bg-elev);
    border-color: var(--border);
    color: var(--text);
}

.btn--ghost:hover {
    border-color: var(--border-strong);
    color: var(--accent);
}

.icon-links {
    display: inline-flex;
    gap: 8px;
}

.icon-links a {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-muted);
    background: var(--bg-elev);
}

.icon-links a:hover {
    color: var(--accent);
    border-color: var(--border-strong);
}

.icon-links svg {
    width: 18px;
    height: 18px;
}

/* ---------- Prose ---------- */
.prose {
    color: var(--text);
    max-width: 74ch;
}

.prose p {
    margin: 0 0 1.15rem;
}

.prose b,
.prose strong {
    font-weight: 650;
}

/* Callout box */
.callout {
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 25%, var(--border));
    border-radius: var(--radius);
    padding: 22px 26px;
    margin: 8px 0 4px;
    position: relative;
}

.callout__label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 10px;
}

.callout p {
    margin: 0 0 0.8rem;
}

.callout p:last-child {
    margin-bottom: 0;
}

/* ---------- Info / contact grid ---------- */
.infogrid {
    display: grid;
    grid-template-columns: 140px 1fr;
    gap: 4px 24px;
    max-width: 640px;
}

.infogrid dt {
    font-weight: 650;
    color: var(--text);
    padding: 10px 0;
}

.infogrid dd {
    margin: 0;
    color: var(--text-muted);
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.infogrid dt {
    border-bottom: 1px solid var(--border);
}

.infogrid dt:last-of-type,
.infogrid dd:last-of-type {
    border-bottom: none;
}

/* ---------- Timeline (about) ---------- */
.timeline {
    position: relative;
    margin: 0;
    padding: 0 0 0 26px;
    list-style: none;
    border-left: 2px solid var(--border);
}

.timeline > li {
    position: relative;
    padding: 0 0 30px 8px;
}

.timeline > li:last-child {
    padding-bottom: 0;
}

.timeline > li::before {
    content: "";
    position: absolute;
    left: -34px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg);
    border: 2.5px solid var(--accent);
}

.tl__head {
    font-size: 1.06rem;
    font-weight: 700;
    margin: 0 0 2px;
}

.tl__meta {
    display: inline-block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 2px 9px;
    border-radius: 20px;
    margin-bottom: 8px;
}

.tl__body {
    margin: 0;
    padding-left: 18px;
    color: var(--text-muted);
}

.tl__body li {
    margin: 2px 0;
}

/* ---------- Publications ---------- */
.year-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    margin: 30px 0 16px;
}

.year-head:first-child {
    margin-top: 4px;
}

.year-head h3 {
    font-size: 1.35rem;
    font-weight: 800;
    margin: 0;
    color: var(--text);
    letter-spacing: -0.02em;
}

.year-head::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

.pub-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pub {
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 18px;
    padding: 18px 20px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.pub:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pub__badge {
    align-self: start;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.74rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
    border-radius: 8px;
    padding: 6px 8px;
    line-height: 1.2;
    min-height: 34px;
}

.pub__title {
    font-size: 1.04rem;
    font-weight: 700;
    margin: 0 0 5px;
    line-height: 1.4;
}

.pub__authors {
    margin: 0 0 4px;
    font-size: 0.93rem;
    color: var(--text-muted);
}

.pub__authors .me {
    color: var(--text);
    font-weight: 700;
}

.pub__venue {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.pub__venue i,
.pub__venue em {
    color: var(--text);
    font-style: italic;
}

.pub__note {
    color: var(--accent);
    font-weight: 600;
}

/* ---------- Research vision ---------- */
.vision__lead {
    color: var(--text);
    max-width: 78ch;
    margin: 0 0 10px;
}

.vision__lead .kr {
    color: var(--text-muted);
}

.vision__core {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px 12px;
    margin: 22px 0 30px;
    padding: 16px 20px;
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 22%, var(--border));
    border-radius: var(--radius);
}

.vision__core-label {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
}

.vision__core-item {
    font-weight: 650;
    color: var(--text);
    font-size: 0.95rem;
}

.vision__core-sep {
    color: var(--accent);
    opacity: 0.55;
    font-weight: 700;
}

.vision__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
    align-items: start;
}

.vcard {
    display: flex;
    flex-direction: column;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 24px 20px;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.18s ease, transform 0.18s ease, box-shadow 0.18s ease;
}

.vcard:hover {
    border-color: var(--border-strong);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.vcard__illust {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 122px;
    margin: -24px -24px 20px;
    border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
    background: linear-gradient(135deg, var(--accent-soft), color-mix(in srgb, var(--accent-soft) 45%, var(--bg-elev)));
    border-bottom: 1px solid var(--border);
    color: var(--accent);
}

.vcard__illust svg {
    width: auto;
    height: 86px;
    max-width: 84%;
}

/* Diagram figures inside the vision section */
.vision-fig {
    margin: 22px 0 4px;
    text-align: center;
}

.vision-fig img {
    display: inline-block;
    max-width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    background: #ffffff;
    padding: 12px;
    box-shadow: var(--shadow-sm);
}

.vision-fig--tall img {
    width: 100%;
    max-width: 430px;
}

.vcard__fig {
    margin: 16px 0 2px;
    text-align: center;
}

.vcard__fig img {
    max-width: 100%;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: #ffffff;
    padding: 8px;
}

.vcard__q {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
}

.vcard__q::before {
    content: "";
    display: inline-block;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
}

.vcard__q {
    position: relative;
}

.vcard__qnum {
    position: absolute;
    left: 0;
    top: 0;
    width: 26px;
    height: 26px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: var(--accent);
    pointer-events: none;
}

.vcard__title {
    font-size: 1.12rem;
    font-weight: 700;
    margin: 0 0 3px;
    letter-spacing: -0.01em;
}

.vcard__title .kr {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 2px;
}

.vcard__desc {
    margin: 10px 0 16px;
    font-size: 0.94rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.vcard__proj {
    margin-top: auto;
    padding-top: 14px;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
    color: var(--text);
}

.vcard__code {
    display: inline-block;
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.82rem;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
    border-radius: 7px;
    padding: 2px 9px;
    margin-right: 8px;
}

.vcard__proj .stat {
    display: block;
    margin-top: 8px;
    font-size: 0.86rem;
    color: var(--text-muted);
}

.vcard__proj .stat b {
    color: var(--accent);
    font-weight: 700;
}

@media (max-width: 780px) {
    .vision__grid {
        grid-template-columns: 1fr;
    }
}

/* ---------- Project cards ---------- */
.proj {
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.proj > h3 {
    margin: 0 0 14px;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
}

.proj figure {
    margin: 20px auto;
    text-align: center;
}

.proj figure img {
    display: inline-block;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    padding: 8px;
    max-width: 100%;
}

.proj .video-wrap {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    margin: 20px 0;
    border-radius: 12px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.proj .video-wrap iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.proj ul {
    padding-left: 20px;
}

.proj h5 {
    font-size: 1.02rem;
    margin: 18px 0 6px;
    color: var(--accent);
}

/* Grant / interest list */
.tick-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.tick-list li {
    position: relative;
    padding: 8px 0 8px 30px;
    border-bottom: 1px solid var(--border);
}

.tick-list li:last-child {
    border-bottom: none;
}

.tick-list li::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 15px;
    width: 8px;
    height: 8px;
    border-radius: 2px;
    background: var(--accent);
}

/* Tag pills */
.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 0;
    margin: 0;
    list-style: none;
}

.tags li {
    font-size: 0.88rem;
    color: var(--text);
    background: var(--bg-soft);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 6px 14px;
}

/* ---------- Blog list ---------- */
.post {
    display: block;
    padding: 22px 24px;
    background: var(--bg-elev);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.18s, transform 0.18s, box-shadow 0.18s;
}

.post:hover {
    border-color: var(--border-strong);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.post h3 {
    margin: 0 0 8px;
    font-size: 1.16rem;
    letter-spacing: -0.01em;
}

.post h3 a {
    color: var(--text);
}

.post h3 a:hover {
    color: var(--accent);
}

.post p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.96rem;
}

.post .video-wrap {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    margin: 4px 0 0;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.post .video-wrap iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

.pill {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-soft);
    border-radius: 6px;
    padding: 3px 9px;
    margin-bottom: 10px;
}

.lead {
    font-size: 1.05rem;
    color: var(--text-muted);
    text-align: center;
    max-width: 60ch;
    margin: 0 auto 8px;
}

/* ---------- Footer ---------- */
.footer {
    border-top: 1px solid var(--border);
    padding: 34px 0;
    margin-top: 20px;
}

.footer__inner {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.footer a {
    color: var(--text-muted);
}

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

/* ---------- Back to top ---------- */
.to-top {
    position: fixed;
    right: 22px;
    bottom: 22px;
    width: 44px;
    height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: var(--accent-contrast);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
    z-index: 40;
}

.to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.to-top:hover {
    background: var(--accent-hover);
    color: var(--accent-contrast);
}

.to-top svg {
    width: 20px;
    height: 20px;
}

/* ---------- Reveal on scroll ---------- */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.55s ease, transform 0.55s ease;
    will-change: opacity, transform;
}

.reveal.in {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    * {
        scroll-behavior: auto !important;
    }
    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* ---------- Responsive ---------- */
@media (max-width: 780px) {
    .hero__grid {
        grid-template-columns: 1fr;
        gap: 26px;
        text-align: center;
        justify-items: center;
    }

    .hero__photo img {
        width: 168px;
        height: 168px;
    }

    .hero__tagline {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__actions {
        justify-content: center;
    }

    .nav__burger {
        display: inline-flex;
    }

    .nav__links {
        position: fixed;
        top: var(--nav-h);
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 2px;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        padding: 12px 16px 18px;
        box-shadow: var(--shadow-md);
        transform: translateY(-8px);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s, transform 0.2s;
    }

    .nav__links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav__links a {
        padding: 12px 14px;
        font-size: 1rem;
    }

    .pub {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .pub__badge {
        justify-self: start;
        min-height: 0;
        padding: 4px 10px;
    }

    .infogrid {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .infogrid dt {
        border-bottom: none;
        padding-bottom: 0;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 16px;
    }
    .container,
    .nav__inner {
        padding-left: 18px;
        padding-right: 18px;
    }
    .proj,
    .callout {
        padding: 18px;
    }
}