/* ===========================
   Return 16 — Pink Tech Blog
   Global Stylesheet
   =========================== */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=DM+Mono:ital,wght@0,300;0,400;0,500;1,300;1,400&family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;1,9..40,300;1,9..40,400&family=Pixelify+Sans:wght@400;500;600;700&display=swap');

/* --- CSS Variables --- */
:root {
  --pink-light:    #fff0f6;
  --pink-pale:     #ffd6ea;
  --pink-soft:     #ffaed4;
  --pink-mid:      #f472b6;
  --pink-strong:   #db2777;
  --pink-deep:     #9d174d;
  --pink-bg:       #fff5f9;
  --pink-card:     #fffbfd;

  --lavender:      #f0e6ff;
  --lavender-mid:  #c4b5fd;
  --lavender-deep: #7c3aed;

  --text-primary:  #2d1a24;
  --text-secondary:#6b3c53;
  --text-muted:    #9e6880;
  --text-link:     #be185d;
  --text-link-hover: #9d174d;

  --border-light:  #fce7f3;
  --border-mid:    #fbcfe8;
  --border-strong: #f9a8d4;

  --code-bg:       #1e0a14;
  --code-text:     #fda4af;
  --code-inline-bg:#fff0f6;
  --code-inline-text: #be185d;

  --shadow-sm:     0 2px 8px rgba(219,39,119,0.08);
  --shadow-md:     0 4px 20px rgba(219,39,119,0.12);
  --shadow-lg:     0 8px 40px rgba(219,39,119,0.16);

  --radius-sm:     6px;
  --radius-md:     12px;
  --radius-lg:     20px;
  --radius-xl:     32px;

  --font-body:     'DM Sans', system-ui, -apple-system, sans-serif;
  --font-mono:     'DM Mono', 'Consolas', 'Courier New', monospace;
  --font-heading:  'DM Sans', system-ui, sans-serif;
  --font-pixel:    'Pixelify Sans', system-ui, sans-serif;

  --max-width:     860px;
  --max-width-wide:1100px;
}

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--pink-bg);
  line-height: 1.7;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 15% 15%, rgba(244,114,182,0.06) 0%, transparent 50%),
    radial-gradient(circle at 85% 85%, rgba(196,181,253,0.06) 0%, transparent 50%);
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--text-link); text-decoration: none; }
a:hover { color: var(--text-link-hover); text-decoration: underline; }

/* --- Skip Link --- */
.skip-link {
  position: absolute; top: -100px; left: 1rem; z-index: 9999;
  background: var(--pink-strong); color: #fff; padding: 0.5rem 1rem;
  border-radius: var(--radius-sm); font-size: 0.875rem;
  transition: top 0.2s;
}
.skip-link:focus { top: 1rem; }

/* ===========================
   SITE HEADER
   =========================== */
.site-header {
  background: linear-gradient(135deg, #fac5db 0%, #f2a9cd 40%, #cfbaf7 100%);
  border-bottom: 2px solid var(--border-strong);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
}

.site-logo img.bow {
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.site-title {
  font-size: 1.5rem;
  font-weight: 600;
  font-family: var(--font-pixel);
  color: var(--pink-deep);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.site-title span {
  display: block;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: lowercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

.site-nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-xl);
  transition: background 0.15s, color 0.15s;
  text-decoration: none;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a.active {
  background: rgba(219,39,119,0.1);
  color: var(--pink-strong);
}

.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  color: var(--pink-strong);
}

/* ===========================
   PAGE LAYOUT
   =========================== */
.page-wrapper {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.page-wrapper--narrow {
  max-width: var(--max-width);
}

/* ===========================
   HERO / CATEGORY HEADER
   =========================== */
.hero {
  text-align: center;
  padding: 3rem 1rem 2rem;
  position: relative;
}

.hero__sparkle {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  object-fit: contain;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  font-family: var(--font-pixel);
  color: var(--pink-deep);
  line-height: 1.2;
  margin-bottom: 0.5rem;
  letter-spacing: -0.03em;
}

.hero__subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 520px;
  margin: 0 auto 1.5rem;
  font-family: var(--font-mono);
}

/* ===========================
   CATEGORY CARDS (homepage)
   =========================== */
.category-section {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0 3rem;
}

.category-card {
  background: var(--pink-card);
  border: 2px solid var(--border-mid);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  text-decoration: none;
  color: inherit;
  display: block;
}

.category-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--border-strong);
  text-decoration: none;
  color: inherit;
}

.category-card__icon {
  font-size: 2rem;
  margin-bottom: 0.75rem;
}

.category-card__name {
  font-size: 1.2rem;
  font-weight: 600;
  font-family: var(--font-pixel);
  color: var(--pink-deep);
  margin-bottom: 0.4rem;
}

.category-card__desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.category-card__count {
  margin-top: 1rem;
  display: inline-block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  background: var(--pink-pale);
  color: var(--pink-deep);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-xl);
}

/* ===========================
   POST CARDS (post lists)
   =========================== */
.section-title {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--pink-deep);
  margin: 2.5rem 0 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title::after {
  content: '';
  flex: 1;
  height: 2px;
  background: linear-gradient(to right, var(--border-strong), transparent);
  border-radius: 2px;
}

.post-grid {
  display: grid;
  gap: 1.25rem;
}

.post-card {
  background: var(--pink-card);
  border: 2px solid var(--border-mid);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s, transform 0.2s, border-color 0.2s;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: start;
}

.post-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.post-card--pinned {
  background: var(--pink-light);
  border-color: var(--pink-soft);
  border-width: 2px;
  padding-bottom: 1.75rem;
  margin-bottom: 2rem;
  position: relative;
}

.post-card--pinned::after {
  content: "";
  display: block;
  position: absolute;
  bottom: -1.25rem;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(to right, var(--border-strong), transparent);
}

.post-card--pinned .post-card__category::before {
  content: "📌 ";
}

.post-card--pinned .post-card__title a::after {
  content: " — Pinned";
  font-size: 0.7rem;
  font-weight: 500;
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--pink-strong);
  vertical-align: middle;
}

.post-card__content { min-width: 0; }

.post-card__category {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--pink-strong);
  margin-bottom: 0.4rem;
}

.post-card__title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
  line-height: 1.35;
}

.post-card__title a {
  color: inherit;
  text-decoration: none;
}

.post-card__title a:hover {
  color: var(--pink-strong);
  text-decoration: none;
}

.post-card__excerpt {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.post-card__meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.post-date {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.tag {
  font-size: 0.7rem;
  background: var(--lavender);
  color: var(--lavender-deep);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-xl);
  font-family: var(--font-mono);
  white-space: nowrap;
}

/* ===========================
   ARTICLE / POST PAGE
   =========================== */
.post-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-light);
}

.post-header__category {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pink-strong);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.post-header__category a {
  color: inherit;
}

.post-header__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  color: var(--pink-deep);
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.post-header__meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.825rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.post-header__tags { display: flex; gap: 0.4rem; flex-wrap: wrap; }

/* --- Article body --- */
.post-body {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
}

.post-body h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--pink-deep);
  margin: 2.5rem 0 1rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--border-light);
}

.post-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 2rem 0 0.75rem;
}

.post-body h4, .post-body h5, .post-body h6 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin: 1.5rem 0 0.5rem;
}

.post-body p { margin-bottom: 1.25rem; }

.post-body a {
  color: var(--text-link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.post-body a:hover { color: var(--text-link-hover); }

.post-body ul, .post-body ol {
  margin: 0 0 1.25rem 1.5rem;
}

.post-body li { margin-bottom: 0.4rem; }

.post-body strong { color: var(--text-secondary); }

.post-body em { font-style: italic; }

.post-body blockquote {
  margin: 1.5rem 0;
  padding: 0.2rem 0 0.2rem 1.25rem;
  border-left: 3px solid var(--pink-soft);
  background: transparent;
}

.post-body blockquote p {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

/* Code blocks */
.post-body pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 1.25rem 1.5rem;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 1.5rem 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  border: 1px solid rgba(244,114,182,0.2);
  box-shadow: var(--shadow-sm);
}

.post-body code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--code-inline-bg);
  color: var(--code-inline-text);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-sm);
}

.post-body pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

.post-body hr {
  border: none;
  border-top: 2px solid var(--border-light);
  margin: 2.5rem 0;
}

/* Note/info box */
.post-body .info-box {
  background: var(--lavender);
  border: 1px solid var(--lavender-mid);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

/* ===========================
   POST FOOTER / BACK LINKS
   =========================== */
.post-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
}

.back-link:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

/* ===========================
   STATIC PAGES (About, Resources)
   =========================== */
.page-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 2px solid var(--border-light);
}

.page-header__title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  color: var(--pink-deep);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-body { font-size: 1rem; line-height: 1.8; }

.page-body h2 {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--pink-deep);
  margin: 2rem 0 1rem;
  padding-bottom: 0.3rem;
  border-bottom: 2px solid var(--border-light);
}

.page-body p { margin-bottom: 1rem; }

.page-body ul { margin: 0 0 1rem 1.5rem; }
.page-body li { margin-bottom: 0.3rem; }
.page-body a { color: var(--text-link); text-decoration: underline; }
.page-body a:hover { color: var(--text-link-hover); }
.page-body a.btn,
.page-body a.btn:hover { color: #fff; text-decoration: none; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  background: var(--pink-strong);
  color: #fff;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, transform 0.15s;
  margin-top: 0.5rem;
}

.btn:hover {
  background: var(--pink-deep);
  text-decoration: none;
  color: #fff;
  transform: translateY(-1px);
}

.resource-group { margin-bottom: 2rem; }

.resource-group h2 {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--pink-deep);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.resource-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.resource-list li a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.9rem;
  background: var(--pink-card);
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  color: var(--text-link);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.15s, border-color 0.15s;
}

.resource-list li a:hover {
  background: var(--pink-pale);
  border-color: var(--border-strong);
  text-decoration: none;
}

/* ===========================
   CATEGORY INDEX PAGE
   =========================== */
.category-page-header {
  background: linear-gradient(135deg, #fac5db 0%, #f2a9cd 60%, #cfbaf7 100%);
  border: 2px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.category-page-header img {
  width: 60px;
  height: 60px;
  object-fit: contain;
  flex-shrink: 0;
}

.category-page-header__text h1 {
  font-size: 1.8rem;
  font-weight: 600;
  font-family: var(--font-pixel);
  color: var(--pink-deep);
  margin-bottom: 0.3rem;
}

.category-page-header__text p {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

/* ===========================
   DECORATIVE ELEMENTS
   =========================== */
.sparkle-divider {
  text-align: center;
  margin: 2rem 0;
  color: var(--pink-soft);
  font-size: 1.2rem;
  letter-spacing: 0.5em;
  opacity: 0.7;
  user-select: none;
}

/* ===========================
   SITE FOOTER
   =========================== */
.site-footer {
  margin-top: auto;
  background: linear-gradient(135deg, #fce7f3 0%, #ede9fe 100%);
  border-top: 2px solid var(--border-mid);
  padding: 2rem 1.5rem;
  text-align: center;
}

.footer-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
}

.footer-bow {
  width: 36px;
  margin: 0 auto 0.75rem;
  opacity: 0.7;
}

.footer-text {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.footer-text a {
  color: var(--pink-strong);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--pink-strong);
  text-decoration: underline;
}

/* ===========================
   MOBILE MENU
   =========================== */
@media (max-width: 640px) {
  .hamburger { display: flex; }

  .site-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 0.5rem 0 1rem;
    gap: 0;
  }

  .site-nav.open { display: flex; }
  .site-nav a { width: 100%; padding: 0.6rem 0.5rem; border-radius: var(--radius-sm); }

  .header-inner { flex-wrap: wrap; }

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

  .category-page-header {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .page-wrapper { padding: 1.25rem 1rem 3rem; }

  .hero { padding: 2rem 0.75rem 1.5rem; }

  .category-section { grid-template-columns: 1fr; }
}

/* ===========================
   ACCESSIBILITY
   =========================== */
:focus-visible {
  outline: 2px solid var(--pink-strong);
  outline-offset: 3px;
  border-radius: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===========================
   UTILITY
   =========================== */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

.text-muted { color: var(--text-muted); }
.mono       { font-family: var(--font-mono); }
.mt-sm      { margin-top: 0.5rem; }
.mt-md      { margin-top: 1rem; }
.mt-lg      { margin-top: 2rem; }

/* ===========================
   TAG FILTER
   =========================== */
.tag-filter {
  margin-bottom: 1.75rem;
}

.tag-filter__label {
  display: block;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.6rem;
}

.tag-filter__controls {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.tag-filter__input {
  width: 100%;
  max-width: 320px;
  padding: 0.45rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  color: var(--text-primary);
  background: var(--pink-card);
  border: 2px solid var(--border-mid);
  border-radius: var(--radius-xl);
  outline: none;
  transition: border-color 0.15s;
}

.tag-filter__input:focus {
  border-color: var(--pink-strong);
}

.tag-filter__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-filter__btn {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  background: var(--lavender);
  color: var(--lavender-deep);
  border: 1.5px solid transparent;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-xl);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
  white-space: nowrap;
}

.tag-filter__btn:hover {
  background: var(--lavender-mid);
  color: var(--lavender-deep);
}

.tag-filter__btn.active {
  background: var(--lavender-deep);
  color: #fff;
  border-color: var(--lavender-deep);
}

.tag-filter__count {
  margin-top: 0.5rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  min-height: 1.2em;
}

/* ===========================
   VIEW ALL LINK (homepage)
   =========================== */
.view-all-wrap {
  text-align: right;
  margin-top: 1rem;
}

.view-all-link {
  font-size: 0.875rem;
  font-family: var(--font-mono);
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
}

.view-all-link:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

/* ===========================
   POST HISTORY PAGE
   =========================== */
.post-history {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}

.post-history__item {
  display: grid;
  grid-template-columns: 7rem 1fr;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  row-gap: 0.1rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--border-light);
  align-items: baseline;
}

.post-history__item:first-child {
  border-top: 1px solid var(--border-light);
}

.post-history__date {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  white-space: nowrap;
  grid-row: 1;
  grid-column: 1;
}

.post-history__item > a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-link);
  text-decoration: none;
  grid-row: 1;
  grid-column: 2;
  line-height: 1.4;
}

.post-history__item > a:hover {
  color: var(--text-link-hover);
  text-decoration: underline;
}

.post-history__cat {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
  grid-row: 2;
  grid-column: 2;
}

/* ===========================
   Flash Cards
   =========================== */

/* Promo banner on maths index */
.fc-promo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: var(--pink-card);
  border: 1.5px solid var(--border-mid);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-bottom: 1.75rem;
}

.fc-promo__text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.fc-promo__text strong {
  font-size: 1rem;
  color: var(--text-secondary);
}

.fc-promo__text span {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Page header */
.flashcard-page-header {
  margin-bottom: 1.5rem;
}

.flashcard-page-header h1 {
  font-size: 1.8rem;
  font-weight: 600;
  font-family: var(--font-pixel);
  color: var(--pink-deep);
  margin: 0.5rem 0 0.4rem;
}

.flashcard-page-header p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Topic filter */
.fc-filter {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.fc-filter__label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.fc-filter__btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.fc-filter__btn {
  padding: 0.3rem 0.85rem;
  border: 1.5px solid var(--border-mid);
  border-radius: var(--radius-xl);
  background: transparent;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.fc-filter__btn:hover {
  background: var(--pink-light);
  border-color: var(--pink-soft);
}

.fc-filter__btn.active {
  background: var(--pink-strong);
  border-color: var(--pink-strong);
  color: #fff;
}

.fc-filter__count {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-left: 0.25rem;
}

/* Deck navigation controls */
.fc-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.fc-progress {
  font-size: 0.875rem;
  color: var(--text-muted);
  min-width: 7rem;
  text-align: center;
}

.fc-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  font-weight: 500;
  font-family: var(--font-body);
  cursor: pointer;
  transition: background 0.15s, transform 0.15s, color 0.15s;
  border: none;
}

.fc-btn--secondary {
  background: var(--pink-light);
  color: var(--text-secondary);
  border: 1.5px solid var(--border-mid);
}

.fc-btn--secondary:hover {
  background: var(--pink-pale);
  transform: translateY(-1px);
}

.fc-btn--shuffle {
  background: var(--lavender);
  color: var(--lavender-deep);
  border: 1.5px solid var(--lavender-mid);
  margin-left: auto;
}

.fc-btn--shuffle:hover {
  background: var(--lavender-mid);
  color: #fff;
  transform: translateY(-1px);
}

/* Card scene — 3-D perspective container */
.fc-scene {
  perspective: 1200px;
  width: 100%;
  max-width: 640px;
  margin: 0 auto 2rem;
  min-height: 280px;
}

/* The flipping card */
.fc-card {
  position: relative;
  width: 100%;
  min-height: 280px;
  transform-style: preserve-3d;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border-radius: var(--radius-lg);
}

.fc-card.is-flipped {
  transform: rotateY(180deg);
}

/* Front and back faces */
.fc-card__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 2rem 2.25rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 0.75rem;
  box-shadow: var(--shadow-md);
}

.fc-card__face--front {
  background: var(--pink-card);
  border: 2px solid var(--border-mid);
}

.fc-card__face--back {
  background: linear-gradient(135deg, var(--pink-light) 0%, var(--lavender) 100%);
  border: 2px solid var(--lavender-mid);
  transform: rotateY(180deg);
}

.fc-card__topic {
  font-size: 0.75rem;
  font-family: var(--font-mono);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  background: var(--pink-pale);
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
}

.fc-card__face--back .fc-card__topic {
  background: var(--lavender-mid);
  color: #fff;
}

.fc-card__question {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.5;
  margin: 0;
}

.fc-card__answer {
  font-size: 0.95rem;
  font-family: var(--font-mono);
  color: var(--text-primary);
  line-height: 1.7;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 0;
  background: transparent;
  border: none;
  padding: 0;
}

.fc-card__hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: auto;
  padding-top: 0.5rem;
}

/* Progress bar */
.fc-progress-bar-wrap {
  position: relative;
  height: 6px;
  background: var(--border-light);
  border-radius: var(--radius-xl);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.fc-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--pink-mid), var(--lavender-mid));
  border-radius: var(--radius-xl);
  transition: width 0.4s ease;
}

.fc-progress-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
  margin-bottom: 0.75rem;
  min-height: 1.1em;
}

/* Ghost button (show/hide learned toggle) */
.fc-btn--ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1.5px solid var(--border-mid);
  font-size: 0.8rem;
  padding: 0.3rem 0.85rem;
}

.fc-btn--ghost:hover {
  background: var(--pink-light);
  color: var(--text-secondary);
  transform: none;
}

.fc-btn--ghost.is-active {
  background: var(--lavender);
  color: var(--lavender-deep);
  border-color: var(--lavender-mid);
}

/* Inline ghost button (inside empty state paragraph) */
.fc-btn--inline {
  display: inline-flex;
  margin-top: 0.5rem;
  font-size: 0.8rem;
}

/* Mark as learned button on card back */
.fc-card__back-actions {
  margin-top: 0.25rem;
}

.fc-btn--learned {
  background: var(--pink-light);
  color: var(--text-secondary);
  border: 1.5px solid var(--border-mid);
  font-size: 0.8rem;
  padding: 0.35rem 0.9rem;
}

.fc-btn--learned:hover {
  background: var(--pink-pale);
  transform: none;
}

.fc-btn--learned.is-learned {
  background: #d1fae5;
  color: #065f46;
  border-color: #6ee7b7;
}

.fc-btn--learned.is-learned:hover {
  background: #a7f3d0;
}

/* All-learned empty state */
.fc-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 1rem;
}

/* Responsive */
@media (max-width: 640px) {
  .fc-promo {
    flex-direction: column;
    align-items: flex-start;
  }

  .fc-card__face {
    padding: 1.5rem 1.25rem;
  }

  .fc-card__question {
    font-size: 1.05rem;
  }

  .fc-btn--shuffle {
    margin-left: 0;
  }
}