@import url("https://fonts.googleapis.com/css2?family=Gowun+Batang:wght@400;700&family=Montserrat:wght@500;600&display=swap");

:root {
  --paper: #f5f6ff;
  --paper-raised: #ffffff;
  --ink: #101342;
  --muted: #62658a;
  --line: #cdd0ec;
  --accent: #030785;
  --accent-soft: #dfe1ff;
  --green: #030785;
  --shadow: 0 18px 50px rgb(3 7 133 / 10%);
  --serif: "Gowun Batang", "Batang", serif;
  --sans: "Montserrat", "Apple SD Gothic Neo", sans-serif;
}

[data-theme="dark"] {
  --paper: #08091f;
  --paper-raised: #10123a;
  --ink: #f1f2ff;
  --muted: #a9acd1;
  --line: #303361;
  --accent: #8d91ff;
  --accent-soft: #282b6b;
  --green: #8d91ff;
  --shadow: 0 18px 50px rgb(0 0 0 / 24%);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--serif);
  line-height: 1.8;
  transition: color 200ms, background 200ms;
}

button,
input {
  font: inherit;
}

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

.noise {
  position: fixed;
  z-index: 10;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.7'/%3E%3C/svg%3E");
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
}

.brand-mark {
  display: grid;
  width: 43px;
  height: 43px;
  color: var(--paper-raised);
  background: var(--accent);
  place-items: center;
  font-size: 22px;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 17px;
  letter-spacing: 0.08em;
}

.brand small {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 8px;
  letter-spacing: 0.2em;
}

nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
}

nav a {
  border-bottom: 1px solid transparent;
}

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

.theme-toggle {
  display: grid;
  width: 39px;
  height: 39px;
  padding: 0;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  place-items: center;
}

.theme-toggle:hover {
  border-color: var(--accent);
  transform: rotate(12deg);
}

.moon,
[data-theme="dark"] .sun {
  display: none;
}

[data-theme="dark"] .moon {
  display: inline;
}

main {
  width: min(1160px, calc(100% - 48px));
  min-height: 70vh;
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.6fr);
  gap: 80px;
  padding: 110px 0 90px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 24px;
  color: var(--accent);
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.18em;
}

.eyebrow::before {
  width: 35px;
  height: 1px;
  background: currentColor;
  content: "";
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

.hero h1 {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(40px, 6vw, 78px);
  font-weight: 400;
  line-height: 1.23;
  letter-spacing: -0.055em;
}

.hero h1 em {
  color: var(--accent);
  font-style: normal;
}

.hero-description {
  max-width: 610px;
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

.hero-aside {
  align-self: end;
  padding: 28px 0 0 28px;
  border-left: 1px solid var(--line);
}

.hero-aside span {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 10px;
  letter-spacing: 0.16em;
}

.hero-aside p {
  margin: 0;
  font-size: 15px;
}

.archive {
  padding-bottom: 110px;
}

.archive-bar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  padding: 24px 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.archive-bar h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 400;
}

.archive-bar h2 span {
  color: var(--accent);
  font-family: var(--sans);
  font-size: 11px;
  vertical-align: top;
}

.search {
  width: min(280px, 100%);
  padding: 10px 2px;
  color: var(--ink);
  border: 0;
  border-bottom: 1px solid var(--line);
  outline: 0;
  background: transparent;
}

.search:focus {
  border-color: var(--accent);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 22px 0;
}

.tag {
  padding: 7px 14px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 100px;
  background: transparent;
  cursor: pointer;
  font-size: 12px;
}

.tag:hover,
.tag.active {
  color: var(--paper-raised);
  border-color: var(--green);
  background: var(--green);
}

.post-list {
  border-top: 1px solid var(--line);
}

.post-card {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  gap: 34px;
  align-items: start;
  padding: 34px 8px;
  border-bottom: 1px solid var(--line);
  transition: padding 180ms, background 180ms;
}

.post-card:hover {
  padding-right: 18px;
  padding-left: 18px;
  background: var(--paper-raised);
}

.post-date {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.post-card h3 {
  margin-bottom: 8px;
  font-size: 22px;
  font-weight: 400;
}

.post-card p {
  max-width: 650px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.post-meta {
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.arrow {
  display: inline-block;
  margin-left: 14px;
  color: var(--accent);
  font-size: 20px;
  transition: transform 180ms;
}

.post-card:hover .arrow {
  transform: translateX(5px);
}

.empty,
.error,
.loading {
  padding: 100px 0;
  color: var(--muted);
  text-align: center;
}

.article-shell {
  width: min(760px, 100%);
  margin: 0 auto;
  padding: 90px 0 120px;
}

.back-link {
  display: inline-block;
  margin-bottom: 50px;
  color: var(--muted);
  font-size: 13px;
}

.back-link:hover {
  color: var(--accent);
}

.article-header {
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.article-header h1 {
  margin: 16px 0 24px;
  font-size: clamp(38px, 7vw, 64px);
  font-weight: 400;
  line-height: 1.3;
  letter-spacing: -0.045em;
}

.article-info {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.article-body {
  padding-top: 45px;
  font-size: 17px;
}

.article-body h2 {
  margin: 2.4em 0 0.7em;
  font-size: 28px;
  font-weight: 400;
}

.article-body h3 {
  margin: 2em 0 0.5em;
  font-size: 21px;
}

.article-body a {
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
}

.article-body blockquote {
  margin: 34px 0;
  padding: 8px 0 8px 25px;
  color: var(--muted);
  border-left: 3px solid var(--accent);
}

.article-body code {
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--accent-soft);
  font-family: Consolas, monospace;
  font-size: 0.88em;
}

.article-body pre {
  overflow-x: auto;
  padding: 22px;
  color: #f1f2ff;
  border-radius: 5px;
  background: #080a35;
  line-height: 1.6;
}

.article-body pre code {
  padding: 0;
  background: transparent;
}

.code-details {
  margin: 32px 0;
  border: 1px solid var(--line);
  background: var(--paper-raised);
}

.code-details summary {
  padding: 15px 18px;
  color: var(--accent);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  list-style-position: inside;
  user-select: none;
}

.code-details[open] summary {
  border-bottom: 1px solid var(--line);
}

.code-details-content {
  padding: 0 18px 18px;
}

.code-details-content pre {
  margin: 18px 0 0;
}

.article-media {
  margin: 42px 0;
}

.article-media img,
.article-media video {
  display: block;
  width: 100%;
  max-height: 75vh;
  border-radius: 5px;
  background: var(--paper-raised);
  box-shadow: var(--shadow);
  object-fit: contain;
}

.article-media figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

.media-error {
  padding: 12px 16px;
  color: var(--accent);
  border: 1px solid var(--accent-soft);
  font-size: 13px;
}

.post-navigation {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 80px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.post-navigation-link {
  display: flex;
  min-height: 120px;
  padding: 20px;
  border: 1px solid var(--line);
  background: var(--paper-raised);
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 180ms, transform 180ms;
}

.post-navigation-link:hover {
  border-color: var(--accent);
  transform: translateY(-3px);
}

.post-navigation-link span {
  color: var(--accent);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.08em;
}

.post-navigation-link strong {
  font-size: 16px;
  font-weight: 400;
  line-height: 1.55;
}

.post-navigation-link.next {
  text-align: right;
}

.about {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: 90px;
  padding: 110px 0 140px;
}

.about-stamp {
  display: grid;
  width: 180px;
  height: 220px;
  color: var(--accent);
  border: 1px solid var(--accent);
  place-items: center;
  font-size: 65px;
  transform: rotate(-3deg);
}

.about h1 {
  margin-bottom: 34px;
  font-size: clamp(42px, 7vw, 70px);
  font-weight: 400;
  line-height: 1.25;
}

.about p {
  color: var(--muted);
  font-size: 17px;
}

.profile-list {
  display: grid;
  gap: 0;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.profile-intro {
  max-width: 650px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 17px;
}

.profile-list li {
  padding: 15px 4px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}

.profile-list time {
  color: var(--muted);
  font-family: var(--sans);
  font-size: 11px;
}

.profile-list a {
  display: inline-block;
  margin-left: 10px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  font-size: 13px;
}

.profile-section {
  margin-top: 52px;
}

.profile-section h2 {
  margin-bottom: 16px;
  font-size: 22px;
  font-weight: 400;
}

footer {
  display: flex;
  justify-content: space-between;
  width: min(1160px, calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 11px;
}

footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .site-header,
  main,
  footer {
    width: min(100% - 30px, 1160px);
  }

  .site-header {
    padding: 20px 0;
  }

  nav {
    gap: 16px;
  }

  .brand small {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 45px;
    padding: 75px 0 65px;
  }

  .hero-aside {
    max-width: 400px;
  }

  .archive-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .search {
    width: 100%;
  }

  .post-card {
    grid-template-columns: 1fr auto;
    gap: 12px;
  }

  .post-date {
    grid-column: 1 / -1;
  }

  .post-card p {
    display: none;
  }

  .article-shell {
    padding-top: 60px;
  }

  .post-navigation {
    grid-template-columns: 1fr;
  }

  .post-navigation-empty {
    display: none;
  }

  .about {
    grid-template-columns: 1fr;
    gap: 60px;
    padding: 80px 0 110px;
  }

  footer {
    gap: 8px;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}