:root {
  --bg-tint: rgba(173, 202, 229, 0.26);
  --panel-bg: rgba(243, 247, 255, 0.28);
  --panel-strong: rgba(250, 252, 255, 0.72);
  --panel-border: rgba(255, 255, 255, 0.34);
  --text-main: #244466;
  --text-soft: rgba(36, 68, 102, 0.72);
  --shadow: 0 24px 80px rgba(13, 27, 45, 0.24);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;
  --max-width: 1240px;
  --topbar-height: 88px;
  --rain-fade-duration: 1600ms;
  --layout-shift-duration: 450ms;
  --layout-shift-easing: cubic-bezier(0.65, 0, 0.22, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text-main);
  font-family: "Segoe UI", "Noto Sans KR", sans-serif;
  background:
    radial-gradient(circle at top, rgba(232, 243, 255, 0.8), transparent 42%),
    linear-gradient(180deg, #7a95af 0%, #45627d 42%, #263d5a 100%);
}

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

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

.site-shell {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
}

.rain-backdrop,
.rain-canvas,
.site-noise {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
}

.rain-backdrop {
  z-index: 0;
  background: center / cover no-repeat;
  opacity: 0.96;
}

.rain-canvas {
  z-index: 1;
  background: center / cover no-repeat;
  opacity: 0;
  transition: opacity var(--rain-fade-duration) ease;
}

body.rain-starting .rain-canvas,
body.rain-ready .rain-canvas {
  opacity: 0.96;
}

.site-noise {
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), rgba(208, 231, 255, 0.06)),
    radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.38), transparent 28%),
    radial-gradient(circle at 78% 64%, rgba(255, 255, 255, 0.2), transparent 24%);
  mix-blend-mode: screen;
}

.page-wrap,
.topbar-wrap {
  position: relative;
  z-index: 3;
}

.page-wrap {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: calc(var(--topbar-height) + 28px) 0 48px;
}

.glass-panel,
.glass-subpanel {
  border: 1px solid var(--panel-border);
  background: var(--panel-bg);
  backdrop-filter: blur(24px) saturate(130%);
  -webkit-backdrop-filter: blur(24px) saturate(130%);
  box-shadow: var(--shadow);
}

.glass-panel {
  border-radius: var(--radius-xl);
}

.glass-subpanel {
  border-radius: var(--radius-lg);
  background: rgba(243, 247, 255, 0.48);
}

.topbar-wrap {
  position: sticky;
  top: 20px;
  padding: 20px 16px 0;
}

.topbar {
  width: min(100%, var(--max-width));
  margin: 0 auto;
  min-height: 62px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 20px;
  border-radius: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
}

.brand-mark {
  font-size: 1rem;
  color: #527ba8;
}

.topbar-links {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.topbar-links a {
  color: var(--text-soft);
  font-size: 0.96rem;
}

.topbar-links a:hover,
.topbar-links a.is-active {
  color: var(--text-main);
}

.home-layout {
  display: grid;
  grid-template-columns: minmax(250px, 290px) minmax(0, 1fr);
  gap: 24px;
  align-items: start;
  transition:
    grid-template-columns var(--layout-shift-duration) var(--layout-shift-easing),
    gap var(--layout-shift-duration) var(--layout-shift-easing);
}

.home-sidebar,
.home-content,
.listing-panel,
.article-panel {
  padding: 24px;
}

.home-sidebar-track {
  min-width: 0;
}

.home-sidebar {
  min-width: 0;
  position: sticky;
  top: calc(var(--topbar-height) + 32px);
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
  transform-origin: left top;
  transition:
    opacity var(--layout-shift-duration) var(--layout-shift-easing),
    transform var(--layout-shift-duration) var(--layout-shift-easing),
    visibility 0s linear 0s,
    padding var(--layout-shift-duration) var(--layout-shift-easing);
}

.home-content {
  min-width: 0;
  transition: width var(--layout-shift-duration) var(--layout-shift-easing);
}

.home-layout.is-sidebar-collapsed {
  grid-template-columns: 0 minmax(0, 1fr);
  gap: 0;
}

.home-layout.is-sidebar-collapsed .home-sidebar-track {
  overflow: hidden;
}

.home-layout.is-sidebar-collapsed .home-sidebar {
  padding: 0;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-24px);
  overflow: hidden;
  border-color: transparent;
  box-shadow: none;
  transition:
    opacity var(--layout-shift-duration) var(--layout-shift-easing),
    transform var(--layout-shift-duration) var(--layout-shift-easing),
    visibility 0s linear var(--layout-shift-duration),
    padding var(--layout-shift-duration) var(--layout-shift-easing);
}

.profile-head {
  display: flex;
  align-items: center;
  gap: 16px;
}

.profile-avatar {
  width: 72px;
  height: 72px;
  border-radius: 22px;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.45);
}

.profile-head h2,
.article-heading h1,
.hero-copy h1,
.section-header h2,
.post-card-copy h3,
.listing-panel h1 {
  margin: 0;
}

.profile-head p,
.article-description,
.hero-description,
.post-card-description,
.empty-state,
.sidebar-section h3,
.sidebar-section p,
.article-body,
.listing-panel .eyebrow {
  color: var(--text-soft);
}

.sidebar-section {
  margin-top: 22px;
}

.sidebar-section h3 {
  margin: 0 0 14px;
  font-size: 1rem;
}

.section-block + .section-block {
  margin-top: 26px;
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-header-spaced {
  margin-bottom: 24px;
}

.hero-card,
.post-card,
.toc-panel {
  overflow: hidden;
}

.hero-card {
  min-height: 290px;
  border-radius: var(--radius-lg);
  position: relative;
  margin-bottom: 26px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background:
    linear-gradient(135deg, rgba(16, 34, 55, 0.16), rgba(224, 239, 255, 0.16)),
    rgba(255, 255, 255, 0.16);
}

.hero-link {
  display: grid;
  min-height: inherit;
}

.hero-image {
  grid-area: 1 / 1;
  background:
    linear-gradient(145deg, rgba(21, 42, 68, 0.62), rgba(14, 28, 48, 0.2)),
    radial-gradient(circle at 25% 20%, rgba(255, 255, 255, 0.12), transparent 35%),
    url("/images/rain-background.png");
  background-size: cover;
  background-position: center;
}

.hero-copy {
  grid-area: 1 / 1;
  display: flex;
  flex-direction: column;
  justify-content: end;
  gap: 12px;
  padding: 28px;
  background: linear-gradient(180deg, rgba(10, 24, 43, 0.04), rgba(7, 20, 38, 0.48));
  color: #f5fbff;
}

.hero-copy p,
.hero-copy .hero-meta {
  color: rgba(245, 251, 255, 0.78);
}

.post-list {
  display: grid;
  gap: 18px;
}

.post-card-link {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  padding: 16px;
}

.post-card-media {
  min-height: 126px;
  border-radius: 16px;
  background:
    linear-gradient(145deg, rgba(21, 42, 68, 0.56), rgba(8, 21, 41, 0.14)),
    url("/images/rain-background.png");
  background-size: cover;
  background-position: center;
}

.post-card-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}

.post-card-meta,
.article-meta-line,
.hero-meta,
.eyebrow {
  font-size: 0.92rem;
}

.tag-cloud,
.post-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag-pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.24);
  border: 1px solid rgba(255, 255, 255, 0.26);
  color: var(--text-soft);
  font-size: 0.84rem;
}

.single-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 24px;
  align-items: start;
}

.article-header {
  margin-bottom: 26px;
}

.article-body {
  line-height: 1.8;
  font-size: 1.02rem;
}

.article-body h2,
.article-body h3,
.article-body h4 {
  color: var(--text-main);
  scroll-margin-top: 110px;
}

.article-body pre,
.article-body code {
  font-family: "Cascadia Code", "Consolas", monospace;
}

.article-body pre {
  overflow-x: auto;
  padding: 16px;
  border-radius: 16px;
  background: rgba(228, 239, 255, 0.56);
}

.article-body blockquote {
  margin: 24px 0;
  padding-left: 18px;
  border-left: 3px solid rgba(82, 123, 168, 0.42);
  color: var(--text-soft);
}

.toc-panel {
  position: sticky;
  top: calc(var(--topbar-height) + 32px);
  padding: 20px;
}

.toc-title {
  margin-bottom: 14px;
  font-weight: 700;
}

.toc-body ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.toc-body a {
  color: var(--text-soft);
}

.listing-panel {
  min-height: 320px;
}

.empty-state {
  padding: 24px;
  text-align: center;
}

@media (max-width: 980px) {
  .home-layout,
  .single-layout {
    grid-template-columns: 1fr;
  }

  .home-layout {
    gap: 24px;
  }

  .home-layout.is-sidebar-collapsed {
    gap: 24px;
  }

  .home-sidebar,
  .toc-panel {
    position: static;
  }

  .home-layout.is-sidebar-collapsed .home-sidebar {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
}

@media (max-width: 720px) {
  :root {
    --topbar-height: 72px;
  }

  .page-wrap {
    width: min(calc(100% - 20px), var(--max-width));
    padding-top: calc(var(--topbar-height) + 18px);
  }

  .topbar {
    padding: 14px 16px;
  }

  .topbar,
  .topbar-links,
  .profile-head,
  .post-card-link {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .post-card-link {
    gap: 14px;
  }

  .post-card-media,
  .hero-card {
    width: 100%;
  }

  .home-sidebar,
  .home-content,
  .listing-panel,
  .article-panel {
    padding: 18px;
  }
}

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

  .rain-canvas,
  .home-layout,
  .home-sidebar,
  .home-content {
    transition: none;
  }
}