/* ── Variables ──────────────────────────────────────────────── */
:root {
  --font-sans: 'Fira Sans', system-ui, sans-serif;
  --font-serif: 'Fira Sans', system-ui, sans-serif;

  --color-bg: #ffffff;
  --color-surface: #ffffff;
  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  --color-text: #111827;
  --color-text-muted: #6b7280;
  --color-text-subtle: #9ca3af;

  --color-accent: #111827;
  --color-accent-hover: #374151;
  --color-accent-soft: #f9fafb;
  --color-heading: #1e3a8a;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .04);
  --shadow-md: 0 2px 8px 0 rgb(0 0 0 / .06);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;

  --transition: 200ms cubic-bezier(.4, 0, .2, 1);
}

/* ── Reset ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { font-family: var(--font-serif); }

/* ── Layout ─────────────────────────────────────────────────── */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.site-main { flex: 1; padding: 24px 0 80px; }

/* ── Header ─────────────────────────────────────────────────── */
.site-header { background: #fff; }

.brand-section { padding: 20px 0 16px; }

.brand-container { display: flex; align-items: flex-start; gap: 16px; }

.brand-link { display: block; flex: 1; min-width: 0; }

.brand-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  display: block;
}

.search-trigger {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  margin-top: 6px;
}
.search-trigger:hover { background: var(--color-accent-soft); color: var(--color-text); border-color: #d1d5db; }

/* ── Spotlight ──────────────────────────────────────────────── */
.spotlight {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  padding: 10vh 24px 24px;
}
.spotlight--open { display: flex; }

.spotlight__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15 23 42 / .5);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.spotlight__box {
  position: relative;
  width: 100%;
  max-width: 620px;
  background: #fff;
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 80px rgba(0 0 0 / .25);
  overflow: hidden;
}

.spotlight__input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--color-border);
}

.spotlight__icon { flex-shrink: 0; color: var(--color-text-muted); }

.spotlight__input {
  flex: 1;
  border: none;
  outline: none;
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-text);
  background: transparent;
  min-width: 0;
}
.spotlight__input::placeholder { color: var(--color-text-subtle); }

.spotlight__esc {
  flex-shrink: 0;
  font-family: var(--font-sans);
  font-size: .7rem;
  color: var(--color-text-subtle);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 2px 6px;
  cursor: pointer;
}

.spotlight__results { max-height: 440px; overflow-y: auto; padding: 8px; }

.sp-result {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-text);
  transition: background var(--transition);
}
.sp-result:hover, .sp-result--active { background: var(--color-accent-soft); }

.sp-thumb {
  flex-shrink: 0;
  width: 52px;
  height: 40px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}
.sp-thumb--empty {
  background: var(--color-border-light);
  border-radius: var(--radius-sm);
}

.sp-result__text { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.sp-result__title { font-size: .9rem; font-weight: 600; color: var(--color-heading); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sp-result__intro { font-size: .75rem; color: var(--color-text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.sp-tag {
  flex-shrink: 0;
  font-size: .65rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  white-space: nowrap;
}

.sp-empty { padding: 24px 16px; text-align: center; font-size: .875rem; color: var(--color-text-muted); }


.nav-link {
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.nav-link:hover { color: var(--color-text); }

/* ── Search ─────────────────────────────────────────────────── */
.search-form { flex: 1; max-width: 280px; }
.search-wrap { position: relative; display: flex; align-items: center; }
.search-icon { position: absolute; left: 10px; color: var(--color-text-subtle); pointer-events: none; }
.search-input {
  width: 100%;
  padding: 7px 12px 7px 34px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: .875rem;
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-input::placeholder { color: var(--color-text-subtle); }
.search-input:focus {
  border-color: var(--color-text);
  box-shadow: 0 0 0 3px rgba(17 24 39 / .08);
}

/* ── Footer ─────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--color-border); padding: 24px 0; }
.site-footer .container { display: flex; justify-content: center; }

.about-link {
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: .875rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
  padding: 0;
}
.about-link:hover { color: var(--color-text); }

/* ── Lightbox ───────────────────────────────────────────────── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.lightbox--open { display: flex; }

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0 0 0 / .45);
  backdrop-filter: blur(4px);
}

.lightbox__box {
  position: relative;
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 40px;
  width: 100%;
  max-width: 600px;
  max-height: 80vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0 0 0 / .2);
}

.lightbox__close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: color var(--transition);
  padding: 4px;
}
.lightbox__close:hover { color: var(--color-text); }

.lightbox__title {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 20px;
}

.lightbox__body { font-size: .95rem; line-height: 1.7; color: var(--color-text-muted); }

/* ── Featured post ──────────────────────────────────────────── */
.featured-section { margin-bottom: 32px; }

.post-card--featured {
  display: grid;
  grid-template-columns: 1fr 1fr;
  flex-direction: unset;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.post-card--featured:hover {
  border-color: #d1d5db;
  box-shadow: var(--shadow-md);
}
.post-card--featured .post-card__image-wrap { height: 400px; border-radius: 0; }
.post-card--featured .post-card__image { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.post-card--featured:hover .post-card__image { transform: scale(1.03); }
.post-card--featured .post-card__content { padding: 28px; display: flex; flex-direction: column; justify-content: center; }
.post-card--featured .post-card__title { font-family: var(--font-serif); font-size: 1.9rem; line-height: 1.2; }
.post-card--featured .post-card__intro { font-size: 1rem; }

/* ── Posts grid ─────────────────────────────────────────────── */
.section-title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.posts-grid { display: flex; flex-direction: column; gap: 12px; background: none; }
.posts-grid .post-card:nth-child(even) .post-card__image-link { order: 1; }
.posts-grid .post-card:nth-child(even) .post-card__content { order: 2; }

/* ── Post card ──────────────────────────────────────────────── */
.post-card {
  background: #fff;
  display: flex;
  flex-direction: row;
  min-height: 160px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.post-card:hover { border-color: #d1d5db; box-shadow: var(--shadow-md); }

.post-card__image-link { display: block; overflow: hidden; flex: 0 0 30%; order: 2; }
.post-card__image-wrap { width: 100%; height: 100%; overflow: hidden; }
.post-card__image { width: 100%; height: 100%; object-fit: contain; transition: transform .4s ease; }
.post-card:hover .post-card__image { transform: scale(1.04); }

.post-card__content { padding: 20px 28px; display: flex; flex-direction: column; flex: 1; gap: 5px; order: 1; }
.post-card__tags { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 2px; }

.post-card__title { font-family: var(--font-serif); font-size: 1.05rem; font-weight: 700; line-height: 1.3; letter-spacing: -.01em; color: var(--color-heading); margin-top: 0; }
.post-card__title a { color: var(--color-heading); transition: color var(--transition); }
.post-card__title a:hover { color: #2d4fa0; }

.post-card__intro {
  font-size: .78rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__date { font-size: .72rem; color: var(--color-text-subtle); font-weight: 500; letter-spacing: .01em; margin-top: 2px; }

.post-card__read-more {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .78rem;
  font-weight: 600;
  color: var(--color-text);
  transition: gap var(--transition);
  margin-top: 0;
}
.post-card__read-more:hover { gap: 8px; }

/* ── Tag pills ──────────────────────────────────────────────── */
.tag-pill {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: .68rem;
  font-weight: 600;
  background: #fff;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
  letter-spacing: .01em;
  line-height: 1.6;
}
.tag-pill:hover { background: var(--color-text); color: #fff; border-color: var(--color-text); }
.tag-pill--lg { padding: 2px 10px; font-size: .72rem; }
.tag-pill--sm { padding: 1px 6px; font-size: .65rem; }

/* ── Tags section ───────────────────────────────────────────── */
.tags-section { margin-top: 56px; padding-top: 40px; border-top: 1px solid var(--color-border); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }

/* ── Page header ────────────────────────────────────────────── */
.page-header { margin-bottom: 40px; }
.page-header__tag { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.page-title { font-family: var(--font-serif); font-size: 2rem; font-weight: 700; letter-spacing: -.02em; }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: .85rem;
  color: var(--color-text-muted);
  transition: color var(--transition);
}
.back-link:hover { color: var(--color-text); }

/* ── Post detail ────────────────────────────────────────────── */
.detail-back { display: inline-flex; align-items: center; gap: 6px; margin: 20px 0 16px; font-size: .85rem; color: var(--color-text-muted); }
.detail-back:hover { color: var(--color-text); }
.detail-back + .post-detail { margin-bottom: 0; }
.detail-back:last-child { margin: 20px 0 32px; }

.post-detail {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: 0;
}

.post-detail__inner { padding: 40px; }

.post-detail__tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 14px; }

.post-detail__title {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -.02em;
  color: var(--color-heading);
  margin-bottom: 10px;
}

.post-detail__meta { font-size: .8rem; color: var(--color-text-muted); margin-bottom: 20px; letter-spacing: .02em; }

.post-detail__body { overflow: hidden; }

.post-detail__intro {
  font-size: .78rem;
  line-height: 1.5;
  color: var(--color-text-muted);
  margin: 0 0 1.5em;
}

.post-detail__hero {
  float: right;
  width: 320px;
  margin: 0 0 20px 28px;
}
.post-detail__hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
}

/* ── Prose ──────────────────────────────────────────────────── */
.prose { font-family: var(--font-sans); font-size: .78rem; line-height: 1.8; color: #1f2937; }

.prose h1, .prose h2, .prose h3, .prose h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  line-height: 1.25;
  margin-top: 2em;
  margin-bottom: .75em;
  color: var(--color-text);
}
.prose h2 { font-size: 1.5rem; }
.prose h3 { font-size: 1.2rem; }
.prose p { margin-bottom: 1.5em; }
.prose a { color: var(--color-text); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--color-border); transition: text-decoration-color var(--transition); }
.prose a:hover { text-decoration-color: var(--color-text); }
.prose ul, .prose ol { padding-left: 1.75em; margin-bottom: 1.5em; }
.prose li { margin-bottom: .4em; }
.prose blockquote {
  border-left: 3px solid var(--color-text);
  padding: 12px 20px;
  margin: 1.5em 0;
  color: var(--color-text-muted);
  font-style: italic;
  font-family: var(--font-serif);
}
.prose code { font-family: 'Fira Code', 'Fira Mono', monospace; font-size: .875em; background: #f3f4f6; padding: 2px 6px; border-radius: 4px; }
.prose pre { background: #111827; color: #f9fafb; padding: 20px 24px; border-radius: var(--radius-md); overflow-x: auto; margin: 1.5em 0; font-size: .875rem; line-height: 1.7; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose img { border-radius: var(--radius-md); margin: 1.5em auto; }
.prose hr { border: none; border-top: 1px solid var(--color-border); margin: 3em 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 1.5em 0; font-size: .9rem; }
.prose th, .prose td { padding: 10px 14px; border: 1px solid var(--color-border); text-align: left; }
.prose th { background: var(--color-bg); font-weight: 600; }

/* ── Search page ────────────────────────────────────────────── */
.search-page-form { margin-bottom: 40px; }
.search-page-wrap { position: relative; display: flex; align-items: center; gap: 12px; }
.search-page-wrap .search-icon { position: absolute; left: 16px; color: var(--color-text-subtle); }
.search-page-input {
  flex: 1;
  padding: 13px 16px 13px 46px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 1rem;
  background: #fff;
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-page-input::placeholder { color: var(--color-text-subtle); }
.search-page-input:focus { border-color: var(--color-text); box-shadow: 0 0 0 3px rgba(17 24 39 / .08); }

.search-submit {
  padding: 13px 22px;
  background: var(--color-text);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: .875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
}
.search-submit:hover { background: var(--color-accent-hover); }

.search-count { color: var(--color-text-muted); margin-bottom: 24px; font-size: .9rem; }
.search-hint { color: var(--color-text-subtle); font-size: .9rem; }

/* ── Pagination ─────────────────────────────────────────────── */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.pagination__btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: background var(--transition), border-color var(--transition);
  text-decoration: none;
}
.pagination__btn:hover { background: var(--color-accent-soft); border-color: #d1d5db; }
.pagination__btn--disabled { color: var(--color-text-subtle); cursor: default; pointer-events: none; }

.pagination__pages { display: flex; align-items: center; gap: 4px; }

.pagination__page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: .875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  transition: background var(--transition), color var(--transition), border-color var(--transition);
  text-decoration: none;
}
.pagination__page:hover { background: var(--color-accent-soft); color: var(--color-text); border-color: var(--color-border); }
.pagination__page--active {
  background: var(--color-heading);
  color: #fff;
  border-color: var(--color-heading);
  font-weight: 700;
  pointer-events: none;
}

/* ── Empty state ────────────────────────────────────────────── */
.empty-state { text-align: center; padding: 80px 24px; color: var(--color-text-muted); }

/* ── Responsive ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .post-card--featured { grid-template-columns: 1fr; }
  .post-card--featured .post-card__image-wrap { height: 220px; }
  .post-card--featured .post-card__content { padding: 28px; }
  .post-card--featured .post-card__title { font-size: 1.4rem; }
  .post-detail__inner { padding: 24px; }
  .post-detail__hero { display: none; }
  .post-detail__body { overflow: visible; }
}

@media (max-width: 480px) {
  .site-main { padding: 32px 0 60px; }
  .search-form { display: none; }
  .search-page-wrap { flex-wrap: wrap; }
  .search-submit { width: 100%; justify-content: center; }
}