/* ============================================================
   2026 Blog Template — Full Redesign
   ============================================================ */

:root {
  --bg: #f7f7fb;
  --bg-accent: none;
  --accent: #2563eb;
  --accent-rgb: 37, 99, 235;
  --accent-2: #1d4ed8;
  --text: #111;
  --card: #ffffff;
  --card-border: rgba(0,0,0,0.06);
  --muted: #6b7280;
  --glass-bg: rgba(255,255,255,0.7);
  --header-bg: rgba(255,255,255,0.72);
  --max-width: 1180px;
  --radius: 16px;
  --radius-sm: 10px;
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
html, body { height: 100%; }
body {
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  background-image: var(--bg-accent);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---- Ambient Canvas ---- */
#ambient-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ---- Reading Progress Bar ---- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 9999;
  transition: width 0.15s linear;
  border-radius: 0 2px 2px 0;
}

/* ---- Sticky Glass Header ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--header-bg);
  backdrop-filter: blur(20px) saturate(1.6);
  -webkit-backdrop-filter: blur(20px) saturate(1.6);
  border-bottom: 1px solid var(--card-border);
  transition: box-shadow 0.3s;
}
.site-header.scrolled {
  box-shadow: 0 4px 30px rgba(0,0,0,0.06);
}
.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  height: 88px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center; /* brand/logo sits centered; nav floats right */
}
.site-title {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text);
  transition: opacity 0.2s;
}
.site-title:hover { opacity: 0.75; }
.site-logo {
  height: 64px;
  width: auto;
  max-width: min(70vw, 420px);
  border-radius: 8px;
  object-fit: contain;
}
.brand { letter-spacing: -0.3px; }
.header-nav {
  position: absolute;
  right: 32px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
}
@media (max-width: 600px) {
  .header-inner { height: 66px; padding: 0 16px; }
  .site-logo { height: 46px; }
  .site-title { font-size: 1.25rem; }
  .header-nav { right: 16px; }
}
.nav-pill {
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
  cursor: default;
  transition: background 0.2s, color 0.2s;
}
.nav-pill.active {
  background: rgba(var(--accent-rgb), 0.1);
  color: var(--accent);
}

/* ---- Back Button (styled, not a hyperlink) ---- */
.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: var(--glass-bg);
  border: 1px solid var(--card-border);
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.back-btn:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  transform: translateX(-3px);
  box-shadow: 0 4px 20px rgba(var(--accent-rgb), 0.3);
}
.back-btn:hover svg { stroke: #fff; }
.back-btn.large {
  padding: 12px 28px;
  font-size: 0.95rem;
}

/* ---- Hero Section ---- */
.hero {
  position: relative;
  z-index: 1;
  padding: 100px 32px 60px;
  text-align: center;
}
.hero-inner {
  max-width: 680px;
  margin: 0 auto;
}
.hero-title {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 480px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ---- Main Wrapper ---- */
.main-wrap {
  position: relative;
  z-index: 1;
  flex: 1;
  padding: 0 32px 80px;
}
.content-grid {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}

/* With sidebar */
.content-grid:has(.sidebar) {
  grid-template-columns: 1fr 300px;
}

/* ---- Section Label ---- */
.section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--muted);
  margin-bottom: 28px;
}
.label-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.5);
  animation: dotPulse 2s infinite;
}
@keyframes dotPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ---- Posts Grid ---- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.empty-state {
  color: var(--muted);
  font-size: 1.05rem;
  padding: 60px 0;
  text-align: center;
}

/* ---- Post Card (full clickable) ---- */
.post-card {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  opacity: 0;
  animation: cardReveal 0.6s ease forwards;
}
.post-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 24px 48px -12px rgba(0,0,0,0.12), 0 0 0 1px rgba(var(--accent-rgb), 0.1);
  border-color: rgba(var(--accent-rgb), 0.2);
}
.card-accent {
  height: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity 0.3s;
}
.post-card:hover .card-accent { opacity: 1; }
.card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.post-date {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
}
.post-card .post-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-bottom: 10px;
  line-height: 1.35;
}
.post-card .post-excerpt {
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.read-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 18px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.25s;
}
.post-card:hover .read-label { gap: 10px; }

@keyframes cardReveal {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---- Post Page ---- */
.post-wrap {
  padding-top: 40px;
}
.post-layout {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
.post-layout:has(.sidebar) {
  grid-template-columns: 1fr 300px;
}
.post-article {
  max-width: 900px;
  margin: 0 auto;
  width: 100%;
}
.post-header {
  margin-bottom: 48px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--card-border);
}
.post-header .post-date {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.post-hero-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.15;
  margin-bottom: 16px;
}
.post-hero-excerpt {
  font-size: 1.15rem;
  color: var(--muted);
  line-height: 1.7;
}

/* ---- Post Content Blocks ---- */
.post-content {
  font-size: 1.05rem;
  line-height: 1.8;
}
.post-content > * + * { margin-top: 1.5em; }
.post-content h2 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.5px; margin-top: 2.5em; }
.post-content h3 { font-size: 1.3rem; font-weight: 600; margin-top: 2em; }
.post-content h4 { font-size: 1.1rem; font-weight: 600; margin-top: 1.5em; }

.post-paragraph {
  color: var(--text);
}
.post-content img {
  border-radius: var(--radius-sm);
  margin: 2em 0;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.post-content img:hover { transform: scale(1.01); }
.post-figure {
  margin: 2em 0;
  text-align: center;
}
.post-figure img { margin: 0 auto; width: 100%; }
.post-figure figcaption {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 12px;
  font-style: italic;
}
/* Supporting image (model-chosen left/right) shown as a two-column block beside a
   short run of text. The image and text live in SEPARATE columns and never
   interleave — text is NOT wrapped around the image — so a sentence can never be
   split across it or reflow to the other side. The image is normalised to a modest
   3:2 landscape (cropped to fill) so a tall photo can't tower over the text. */
.post-media-block {
  display: flex;
  gap: 2em;
  align-items: flex-start;
  margin: 2em 0;
}
.post-media-block--right { flex-direction: row-reverse; }
.post-media-block .post-figure {
  flex: 0 0 40%;
  margin: 0.35em 0 0;
}
.post-media-block .post-figure img {
  width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border-radius: var(--radius-sm);
  margin: 0;
}
.post-media-text {
  flex: 1 1 0;
  min-width: 0;
}
.post-media-text > * { margin-top: 0; }
.post-media-text > * + * { margin-top: 1.1em; }
/* A supporting image with too little (or no) text beside it: smaller and centered. */
.post-figure--solo {
  max-width: 60%;
  margin-left: auto;
  margin-right: auto;
}
@media (max-width: 760px) {
  .post-media-block,
  .post-media-block--right { flex-direction: column; gap: 1em; }
  .post-media-block .post-figure { flex-basis: auto; width: 100%; margin: 0; }
  .post-media-block .post-figure img { aspect-ratio: 16 / 9; }
  .post-figure--solo { max-width: 100%; }
}
.post-quote {
  border-left: 3px solid var(--accent);
  padding: 20px 24px;
  margin: 2em 0;
  background: var(--glass-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--muted);
}
.post-quote footer {
  margin-top: 12px;
  font-style: normal;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
}
.post-list {
  padding-left: 1.5rem;
}
.post-list li + li { margin-top: 0.5em; }
.post-link {
  color: var(--accent);
  font-weight: 500;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity 0.2s;
}
.post-link:hover { opacity: 0.7; }

.embed {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-sm);
  margin: 2em 0;
  background: rgba(0,0,0,0.05);
}
.embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---- Post bottom nav ---- */
.post-footer-nav {
  max-width: 760px;
  margin: 56px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--card-border);
}

/* ---- Sidebar ---- */
.sidebar { position: relative; }
.ad-slot {
  background: var(--card);
  border: 1px solid var(--card-border);
  padding: 16px;
  border-radius: var(--radius);
  text-align: center;
  position: sticky;
  top: 88px;
}
.ad-inline {
  margin: 2em 0;
  text-align: center;
}

/* ---- Footer ---- */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--card-border);
  padding: 40px 32px;
}
.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  font-weight: 700;
  font-size: 1rem;
}
.footer-copy {
  font-size: 0.85rem;
  color: var(--muted);
}

/* ---- Scroll-triggered fade-in ---- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .hero { padding: 72px 20px 40px; }
  .main-wrap { padding: 0 20px 60px; }
  .header-inner { padding: 0 20px; }
  .content-grid,
  .content-grid:has(.sidebar) {
    grid-template-columns: 1fr;
  }
  .post-layout,
  .post-layout:has(.sidebar) {
    grid-template-columns: 1fr;
  }
  .posts-grid {
    grid-template-columns: 1fr;
  }
  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2rem; }
  .card-body { padding: 20px; }
  .post-hero-title { font-size: 1.7rem; }
}

/* ============================================================
   Theme Effects — all toggle-able via <body class="fx-…"> (see lib.php).
   --anim-speed is a duration multiplier, --fx-intensity is a 0–1 strength.
   ============================================================ */

/* ---- Ambient orbs canvas (only present when fx-orbs is on) ---- */
#ambient-canvas { opacity: calc(0.5 + 0.5 * var(--fx-intensity, 0.6)); }

/* ---- Aurora: a slow drifting gradient wash behind everything ---- */
.fx-aurora-layer {
  position: fixed;
  inset: -25%;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(38% 38% at 22% 28%, rgba(var(--accent-rgb), 0.55), transparent 70%),
    radial-gradient(32% 32% at 80% 18%, rgba(var(--accent-rgb), 0.38), transparent 70%),
    radial-gradient(44% 44% at 62% 82%, rgba(var(--accent-rgb), 0.45), transparent 70%);
  filter: blur(64px) saturate(1.35);
  opacity: calc(0.18 + 0.5 * var(--fx-intensity));
  animation: auroraDrift calc(34s * var(--anim-speed)) ease-in-out infinite alternate;
}
@keyframes auroraDrift {
  0%   { transform: translate3d(-3%, -2%, 0) rotate(0deg)  scale(1.05); }
  50%  { transform: translate3d(4%, 3%, 0)   rotate(8deg)  scale(1.18); }
  100% { transform: translate3d(-2%, 4%, 0)  rotate(-6deg) scale(1.1); }
}

/* ---- Film grain overlay ---- */
.fx-grain-layer {
  position: fixed;
  inset: 0;
  z-index: 9998;
  pointer-events: none;
  mix-blend-mode: overlay;
  opacity: calc(0.03 + 0.08 * var(--fx-intensity));
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 140px 140px;
  animation: grainShift calc(1.1s * var(--anim-speed)) steps(3) infinite;
}
@keyframes grainShift {
  0%   { transform: translate(0, 0); }
  33%  { transform: translate(-4%, 3%); }
  66%  { transform: translate(3%, -3%); }
  100% { transform: translate(0, 0); }
}

/* ---- Glassmorphism on cards & buttons ---- */
.fx-glass .post-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px) saturate(1.5);
  -webkit-backdrop-filter: blur(16px) saturate(1.5);
}
.fx-glass .post-media-block .post-figure,
.fx-glass .post-figure--solo { box-shadow: 0 12px 32px -14px rgba(0,0,0,0.35); }

/* ---- Glow: luminous accent shadows ---- */
.fx-glow .hero-title { text-shadow: 0 0 calc(48px * var(--fx-intensity)) rgba(var(--accent-rgb), 0.45); }
.fx-glow .label-dot { box-shadow: 0 0 18px rgba(var(--accent-rgb), 0.9); }
.fx-glow .reading-progress { box-shadow: 0 0 14px rgba(var(--accent-rgb), 0.85); }
.fx-glow .post-card:hover {
  box-shadow: 0 24px 52px -12px rgba(var(--accent-rgb), 0.4), 0 0 0 1px rgba(var(--accent-rgb), 0.35);
}
.fx-glow .nav-pill.active { box-shadow: 0 0 20px rgba(var(--accent-rgb), 0.35); }

/* ---- Gradient text on major headings ---- */
.fx-gradient-text .post-hero-title,
.fx-gradient-text .post-content h2 {
  background: linear-gradient(120deg, var(--text) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ---- Tilt: cards get depth; JS adds the pointer-follow rotation ---- */
.fx-tilt .posts-grid { perspective: 1000px; }
.fx-tilt .post-card {
  transform-style: preserve-3d;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

/* ---- Animated link underline sweep ---- */
.fx-anim-links .post-content a,
.fx-anim-links .post-link {
  color: var(--accent);
  background-image: linear-gradient(var(--accent), var(--accent));
  background-repeat: no-repeat;
  background-position: 0 100%;
  background-size: 0% 2px;
  transition: background-size calc(0.35s * var(--anim-speed)) ease;
  padding-bottom: 1px;
}
.fx-anim-links .post-content a:hover,
.fx-anim-links .post-link:hover { background-size: 100% 2px; }

/* Reading progress bar hidden unless the effect is on */
body:not(.fx-progress) .reading-progress { display: none; }

/* ---- Respect users who prefer reduced motion ---- */
@media (prefers-reduced-motion: reduce) {
  .fx-aurora-layer,
  .fx-grain-layer,
  #ambient-canvas,
  .label-dot { animation: none !important; }
  .reveal { transition: none !important; }
  .fx-tilt .post-card { transform: none !important; }
}