:root {
  --bg: #ffffff;
  --bg-card: #ffffff;
  --bg-subtle: #f5f8f6;
  --text-main: #1a1a1a;
  --text-muted: #666666;
  --text-light: #999999;
  --border: #e6e6e6;
  --border-hover: #999999;
  --link: #1a1a1a;
  --link-border: #cccccc;
  --link-border-hover: #1a1a1a;
  --primary: #2b7a4b;
  --primary-text: #ffffff;
  --radius-card: 16px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121212;
    --bg-card: #1a1a1a;
    --bg-subtle: #1c241e;
    --text-main: #e6e6e6;
    --text-muted: #a0a0a0;
    --text-light: #777777;
    --border: #333333;
    --border-hover: #666666;
    --link: #e6e6e6;
    --link-border: #555555;
    --link-border-hover: #e6e6e6;
    --primary: #4e9e6a;
    --primary-text: #000000;
  }
}

/* Base & Reset */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, Roboto, sans-serif;
  line-height: 1.7;
  font-size: 16px;
  word-break: keep-all;
  overflow-wrap: break-word;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

a {
  color: var(--link);
  text-decoration: none;
  box-shadow: inset 0 -1px 0 var(--link-border);
  transition: color 0.2s, box-shadow 0.2s, border-color 0.2s, background-color 0.2s;
}

a:hover {
  box-shadow: inset 0 -2px 0 var(--link-border-hover);
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition: none !important;
  }
}

/* Header & Nav */
.site-header {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
}

.site-header .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

a.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: none;
  font-weight: 700;
  font-size: 1.125rem;
}

a.brand:hover {
  box-shadow: none;
  opacity: 0.8;
}

img.brand-logo {
  width: 32px;
  height: 32px;
  border-radius: 20px;
}

nav.nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

nav.nav a {
  box-shadow: none;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 4px 0;
  color: var(--text-muted);
}

nav.nav a:hover {
  color: var(--text-main);
  box-shadow: inset 0 -2px 0 var(--text-main);
}

nav.nav a[aria-current="page"] {
  font-weight: 700;
  color: var(--text-main);
  box-shadow: inset 0 -2px 0 var(--text-main);
}

/* Typography & Pages */
h1, h2, h3 {
  color: var(--text-main);
  margin-top: 0;
}

h1.page-title {
  font-size: 2rem;
  margin: 40px 0 8px;
}

p.page-lead {
  color: var(--text-muted);
  font-size: 1.125rem;
  margin: 0 0 40px;
}

/* Post List */
ul.post-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

li.post-card {
  display: block;
}

a.post-card-link {
  display: block;
  padding: 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: none;
}

a.post-card-link:hover {
  box-shadow: none;
  border-color: var(--border-hover);
}

h2.post-card-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

p.post-card-summary {
  color: var(--text-muted);
  margin: 0 0 16px;
  font-size: 1rem;
}

div.post-meta {
  font-size: 0.875rem;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

ul.tag-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

li.tag {
  color: var(--text-muted);
}

a.tag-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--border);
  text-underline-offset: 3px;
}

a.tag-link:hover {
  color: var(--primary);
  text-decoration-color: var(--primary);
}

/* Post Content */
p.breadcrumb {
  font-size: 0.875rem;
  color: var(--text-light);
  margin: 24px 0 32px;
}

.post-header {
  margin-bottom: 40px;
}

h1.post-title {
  font-size: 2.25rem;
  margin-bottom: 16px;
  line-height: 1.3;
}

div.post-body {
  font-size: 1.0625rem;
}

div.post-body h2 {
  font-size: 1.5rem;
  margin: 56px 0 24px;
}

div.post-body h3 {
  font-size: 1.25rem;
  margin: 40px 0 16px;
}

div.post-body p {
  margin: 0 0 24px;
}

div.post-body a {
  font-weight: 500;
}

div.post-body ul, 
div.post-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

div.post-body li {
  margin-bottom: 8px;
}

div.post-body strong {
  font-weight: 600;
}

div.post-body code {
  background: var(--bg-subtle);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
}

div.post-body pre {
  background: var(--bg-subtle);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 24px;
}

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

div.post-body blockquote {
  margin: 0 0 24px;
  padding: 8px 0 8px 16px;
  border-left: 4px solid var(--border);
  color: var(--text-muted);
}

div.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
}

div.post-body th, 
div.post-body td {
  border: 1px solid var(--border);
  padding: 12px;
  text-align: left;
}

div.post-body hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 48px 0;
}

/* Call to Action */
div.cta {
  background-color: var(--bg-subtle);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  margin: 56px 0;
}

div.cta p {
  font-size: 1.125rem;
  margin: 0 0 24px;
  font-weight: 500;
}

/* Buttons */
a.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 24px;
  border: 1px solid var(--border-hover);
  border-radius: 8px;
  background-color: transparent;
  color: var(--text-main);
  font-weight: 600;
  box-shadow: none;
}

a.btn:hover {
  box-shadow: none;
  border-color: var(--primary);
  color: var(--primary);
}

a.btn.btn-primary {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--primary-text);
}

a.btn.btn-primary:hover {
  opacity: 0.9;
  color: var(--primary-text);
}

/* Post Navigation */
nav.post-nav {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

nav.post-nav a {
  box-shadow: none;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 0;
}

nav.post-nav a:hover {
  box-shadow: inset 0 -2px 0 var(--primary);
  color: var(--primary);
}

@media (min-width: 600px) {
  nav.post-nav {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* App Grid */
div.app-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

@media (min-width: 600px) {
  div.app-grid {
    grid-template-columns: 1fr 1fr;
  }
}

div.app-card {
  padding: 32px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  text-align: center;
}

img.app-icon {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  margin-bottom: 16px;
}

div.app-card h2 {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

div.app-card p {
  color: var(--text-muted);
  margin: 0 0 24px;
}

/* Tag Cloud */
ul.tag-cloud {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

ul.tag-cloud li {
  display: inline-flex;
}

a.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: none;
  color: var(--text-main);
  background-color: var(--bg-card);
}

a.tag:hover {
  box-shadow: none;
  border-color: var(--primary);
  color: var(--primary);
}

span.count {
  color: var(--text-light);
  font-size: 0.875rem;
}

/* Footer */
.site-footer {
  margin-top: 80px;
  padding: 40px 0;
  border-top: 1px solid var(--border);
}

.site-footer p.footer-text {
  color: var(--text-light);
  font-size: 0.875rem;
  margin: 0 0 16px;
}

.site-footer a {
  box-shadow: none;
  color: var(--text-muted);
}

.site-footer a:hover {
  color: var(--text-main);
  box-shadow: inset 0 -1px 0 var(--text-main);
}

/* Google Play 배지·QR (I 세션 추가) */
.badge-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin: 20px 0; }
.play-badge, .play-badge:hover { display: inline-block; box-shadow: none; line-height: 0; }
.play-badge:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.play-badge img { display: block; height: 60px; width: auto; }
.qr-block { display: none; text-align: center; }
.qr-block .qr { display: block; width: 132px; height: 132px; border: 1px solid var(--border); border-radius: 8px; background: #fff; }
.qr-caption { margin: 6px 0 0; font-size: 12px; color: var(--text-muted); }
.get-apps { display: grid; gap: 16px; margin: 24px 0 32px; }
.get-app { border: 1px solid var(--border); border-radius: var(--radius-card); padding: 16px 20px; }
.get-app-name { margin: 0 0 4px; font-size: 17px; }
@media (min-width: 768px) {
  .qr-block { display: block; }
  .get-apps { grid-template-columns: 1fr 1fr; }
  .get-app .badge-row { align-items: flex-start; }
}

/* 스크린샷 갤러리 (I 세션 추가) */
.gallery { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; margin: 24px 0; padding: 4px 0 12px; -webkit-overflow-scrolling: touch; }
.shot { flex: 0 0 200px; margin: 0; scroll-snap-align: start; }
.shot img { display: block; width: 100%; height: auto; border: 1px solid var(--border); border-radius: 12px; background: var(--bg-subtle); }
.shot figcaption { margin-top: 6px; font-size: 13px; color: var(--text-muted); }
@media (min-width: 768px) { .shot { flex-basis: 220px; } }
.cta .badge-row { justify-content: center; }

/* Play 리뷰 링크 (I 세션 추가) */
.review { margin: 32px 0 0; padding-top: 16px; border-top: 1px solid var(--border); font-size: 14px; color: var(--text-muted); }