@font-face {
  font-family: "PingFangSC";
  font-display: swap;
  src: url("../font/PingFangSC-Regular.ttf") format("truetype");
}

@font-face {
  font-family: "Noto Sans SC";
  font-display: swap;
  font-weight: normal;
  font-style: normal;
  src: url("../font/NotoSansSC.ttf") format("truetype");
}

:root {
  --post-hero-title-max: 1120px;
  --tufte-toc-top: 64px;
  --tufte-toc-width: clamp(280px, 18vw, 360px);
  --tufte-toc-hitbox-width: 42px;
  --tufte-toc-bg: rgba(250, 252, 255, 0.72);
  --tufte-nav-z: 4000;
  --tufte-toc-z: 3200;
}

#navbar.navbar {
  z-index: var(--tufte-nav-z) !important;
}

/* Full-width hero with consistent crop ratio across posts. */
.post-hero-media {
  position: relative;
  width: 100%;
  max-width: 100%;
  aspect-ratio: 16 / 7;
  min-height: 220px;
  max-height: 320px;
  overflow: hidden;
  background: #dfe6ef;
}

@supports not (aspect-ratio: 1 / 1) {
  .post-hero-media {
    height: clamp(320px, 26vw, 460px);
  }
}

.post-hero-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(9, 19, 35, 0.04), rgba(9, 19, 35, 0.12));
  pointer-events: none;
}

.post-hero-img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: var(--post-hero-focus, 50% 36%);
  filter: saturate(1.02) contrast(1.01);
}

.post-hero-title-ctn {
  background: var(--board-bg-color, #fff);
}

.post-hero-title-inner {
  max-width: min(var(--post-hero-title-max), 96vw);
  margin: 0 auto;
  padding: 1.65rem 1.15rem 1.05rem;
}

.post-hero-h1 {
  margin: 0 auto;
  max-width: min(32ch, 95vw);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(1.92rem, 2.1vw + 0.65rem, 3.05rem);
  line-height: 1.12;
  letter-spacing: 0.003em;
  font-weight: 700;
  color: var(--text-color, #2f3a4f);
  text-wrap: pretty;
  word-break: break-word;
  overflow-wrap: break-word;
  hyphens: auto;
}

.post-hero-title-ctn .mt-3,
.post-hero-title-ctn .mt-1 {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.post-hero-title-ctn .post-meta {
  margin-right: 0 !important;
  font-size: 0.98rem;
  line-height: 1.45;
  color: color-mix(in srgb, var(--text-color, #2f3a4f) 88%, #6e7f96 12%);
}

#board.post-board-hero {
  margin-top: 0.72rem !important;
  padding-top: 2.5rem;
}

/* Remove same-category module only inside the Tufte right rail. */
.tufte-post-right .category-bar,
.tufte-post-right .category-list,
.tufte-post-right .category-post-list,
.tufte-post-right .category-sub,
.tufte-post-right .category-item-action,
.tufte-post-right #category-bar {
  display: none !important;
}

/* Tufte TOC floating layer is desktop-only and hidden by default. */
#toc-edge-hitbox.tufte-toc-edge,
#toc-ctn.tufte-toc-panel {
  display: none;
}

@media (min-width: 1200px) {
  #toc-edge-hitbox.tufte-toc-edge {
    display: block;
    position: fixed;
    right: 0;
    top: 0;
    width: var(--tufte-toc-hitbox-width);
    height: 100vh;
    z-index: calc(var(--tufte-toc-z) - 1);
    background: transparent;
  }

  #toc-ctn.tufte-toc-panel {
    display: block;
    position: fixed !important;
    right: 0 !important;
    top: 0;
    width: var(--tufte-toc-width);
    height: 100vh;
    margin: 0 !important;
    padding: 0 !important;
    z-index: var(--tufte-toc-z);
    transform: translateX(calc(100% + 2px));
    will-change: transform, opacity;
    opacity: 0;
    pointer-events: none;
    transition: transform 210ms ease, opacity 210ms ease;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: var(--tufte-toc-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    overflow: hidden;
  }

  #toc-ctn.tufte-toc-panel::after {
    content: none !important;
    display: none !important;
  }

  #toc-ctn.tufte-toc-panel #toc {
    margin: 0;
    height: 100%;
    box-sizing: border-box;
    padding-top: calc(var(--tufte-toc-top) + 0.85rem);
    padding-bottom: 1rem;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: transparent;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
  }

  #toc-ctn.tufte-toc-panel .toc-header,
  #toc-ctn.tufte-toc-panel .toc-body {
    width: min(19rem, calc(100% - 2rem));
    margin-left: auto;
    margin-right: auto;
  }

  #toc-ctn.tufte-toc-panel .toc-header {
    margin-bottom: 0.9rem;
  }

  #toc-ctn.tufte-toc-panel .toc-body {
    max-height: calc(100vh - var(--tufte-toc-top) - 220px);
    overflow-y: auto;
    overflow-x: hidden;
  }

  #toc-ctn.tufte-toc-panel .toc-list-item {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
  }

  #toc-edge-hitbox.tufte-toc-edge:hover + #toc-ctn.tufte-toc-panel,
  #toc-ctn.tufte-toc-panel:hover,
  #toc-ctn.tufte-toc-panel:focus-within {
    transform: translateX(0);
    opacity: 1;
    pointer-events: auto;
  }
}

@media (max-width: 1199.98px) {
  .post-hero-media {
    aspect-ratio: 16 / 8;
    min-height: 180px;
    max-height: 240px;
  }

  .post-hero-title-inner {
    padding: 1.38rem 1rem 0.92rem;
  }

  #board.post-board-hero {
    margin-top: 0.5rem !important;
    padding-top: 2.2rem;
  }

  .post-hero-h1 {
    max-width: min(30ch, 94vw);
    font-size: clamp(1.54rem, 3.4vw + 0.45rem, 2.28rem);
    line-height: 1.15;
  }

  #toc-edge-hitbox.tufte-toc-edge,
  #toc-ctn.tufte-toc-panel {
    display: none !important;
  }
}

@media (max-width: 767.98px) {
  .post-hero-media {
    aspect-ratio: 16 / 8;
    min-height: 140px;
    max-height: 220px;
  }

  .post-hero-title-inner {
    padding: 1.02rem 0.82rem 0.78rem;
  }

  #board.post-board-hero {
    margin-top: 0.38rem !important;
    padding-top: 1.85rem;
  }

  .post-hero-h1 {
    max-width: 96vw;
    font-size: clamp(1.24rem, 5.2vw, 1.8rem);
    line-height: 1.18;
    letter-spacing: 0.002em;
  }

  .post-hero-title-ctn .post-meta {
    font-size: 0.9rem;
  }
}

#seo-header {
  display: none !important;
}


/* 20260208f: Notion/Anthropic hero (title+dek+meta inside board) */

#board.post-board-hero {
  margin-top: 0 !important;
  padding-top: 0 !important;
  box-shadow: none !important;
  border-radius: 0 !important;
}

@media (min-width: 1200px) {
  #board.post-board-hero {
    border: 1px solid rgba(0, 0, 0, 0.06);
    border-left: 0;
    border-right: 0;
  }
}

.post-content .post-head {
  max-width: min(1120px, 96vw);
  margin: 0 auto;
  padding: clamp(1.25rem, 2.5vw, 2rem) 1.15rem 1.25rem;
}

.post-content .post-head--hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 2.25rem;
  align-items: start;
}

@media (max-width: 991.98px) {
  .post-content .post-head--hero {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
}

.post-page-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.9rem;
  background: rgba(0, 0, 0, 0.035);
}

.post-page-icon img {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  object-fit: cover;
  display: block;
}

.post-page-emoji {
  font-size: 1.55rem;
  line-height: 1;
}

.post-title {
  margin: 0;
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: clamp(2.05rem, 2.3vw + 0.65rem, 3.15rem);
  line-height: 1.06;
  letter-spacing: 0.002em;
  font-weight: 750;
  color: var(--post-heading-color, #1a202c);
  text-wrap: balance;
  word-break: break-word;
  overflow-wrap: anywhere;
}

.post-dek {
  margin: 0.95rem 0 0;
  max-width: 70ch;
  font-size: 1.12rem;
  line-height: 1.58;
  color: var(--sec-text-color, #718096);
}

.post-head-meta {
  border-left: 1px solid rgba(0, 0, 0, 0.08);
  padding-left: 1.2rem;
  font-size: 0.96rem;
  line-height: 1.45;
  color: var(--text-color, #3c4858);
}

@media (max-width: 991.98px) {
  .post-head-meta {
    border-left: 0;
    padding-left: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding-top: 1rem;
  }
}

.post-head-meta-item {
  padding: 0.55rem 0;
}

.post-head-meta-item + .post-head-meta-item {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}

.post-head-meta-label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: color-mix(in srgb, var(--text-color, #3c4858) 62%, #98a6b7 38%);
}

.post-head-meta-value {
  margin-top: 0.22rem;
  font-weight: 600;
}

.post-head-meta-value a {
  font-weight: 650;
}

/* Ensure the visible hero H1 is the primary title; keep the SEO header hidden. */
#seo-header {
  display: none !important;
}

/* Tufte TOC panel: JS-controlled open state (non-locking). */
@media (min-width: 1200px) {
  html.tufte-toc-js #toc-ctn.tufte-toc-panel {
    transform: translateX(calc(100% + 2px));
    opacity: 0;
    pointer-events: none;
  }

  html.tufte-toc-js.tufte-toc-open #toc-ctn.tufte-toc-panel {
    transform: translateX(0) !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }
}

/* 20260208n-extra: wide desktop left-lane TOC for tufte posts. */
@media (min-width: 1500px) {
  :root {
    --tufte-left-toc-width: clamp(240px, 15vw, 320px);
    --tufte-left-toc-gap: clamp(20px, 2vw, 36px);
    --tufte-board-max: 1540px;
    --tufte-board-pad: clamp(1rem, 1.6vw, 1.5rem);
    --tufte-left-toc-inset: 16px;
  }
  .tufte-board-shell #board.tufte-left-toc-ready {
    padding-left: var(--tufte-board-pad) !important;
    padding-right: var(--tufte-board-pad) !important;
  }

  #toc-edge-hitbox.tufte-toc-edge.tufte-left-toc-mode-target {
    display: none !important;
  }

  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target {
    position: fixed !important;
    left: var(--tufte-left-toc-left, max(14px, calc((100vw - min(var(--tufte-board-max), 98vw)) / 2 + var(--tufte-board-pad) + var(--tufte-left-toc-inset)))) !important;
    right: auto !important;
    top: var(--tufte-left-toc-top, calc(var(--tufte-toc-top) + 12px)) !important;
    width: var(--tufte-left-toc-width) !important;
    height: var(--tufte-left-toc-height, calc(100vh - var(--tufte-toc-top) - 24px)) !important;
    transform: none !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    margin: 0 !important;
    padding: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
    background: transparent !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    z-index: calc(var(--tufte-nav-z) - 1) !important;
  }

  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target #toc {
    height: 100%;
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
    background: transparent !important;
  }

  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target .toc-header,
  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target .toc-body {
    width: 100%;
    margin: 0;
  }

  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target .toc-header {
    margin-bottom: 0.5rem;
  }

  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target .toc-body {
    max-height: var(--tufte-left-toc-body-max-height, calc(100vh - var(--tufte-toc-top) - 86px));
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 0.2rem;
  }

  html.tufte-toc-js #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target {
    transform: none !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }

  #toc-edge-hitbox.tufte-toc-edge.tufte-left-toc-mode-target:hover + #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target,
  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target:hover,
  #toc-ctn.tufte-toc-panel.tufte-left-toc-mode-target:focus-within {
    transform: none !important;
    opacity: 1 !important;
    pointer-events: auto !important;
  }
}