/* Smooth cyberpunk reveal animations for single posts.
 * Все timings — cubic-bezier(0.22, 1, 0.36, 1) (Apple-style ease-out).
 * Никакого steps() — плавное движение, cyberpunk через цвет и glow, не через дрожь. */

:root {
  --cyber-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ──────────────── h1 — decoder + idle breathing + underline sweep ──────────────── */
/* Decoder: no-reflow approach.
   Real char stays in DOM (determines layout width, always Manrope).
   Noise shown via ::before { position:absolute } — cosmetic only, doesn't affect layout.
   color:transparent hides real char; ::before data-n shows noise char at same position.
   Result: character widths = real widths always → no line-wrap jank. */
.single-post h1 {
  position: relative;
}

/* Decoder span — wraps one character each */
.h1-dc {
  position: relative;
  display: inline;
  color: transparent; /* hide real char */
}
.h1-dc::before {
  content: attr(data-n);  /* noise char */
  color: var(--text-muted);
  position: absolute;
  left: 0; top: 0;
  pointer-events: none;
  font-family: inherit;
}
.h1-dc.revealed {
  color: inherit;         /* show real char */
}
.h1-dc.revealed::before { content: none; }
.h1-dc.flash-cyan {
  color: var(--cyan);
  text-shadow: 0 0 10px var(--cyan);
}

/* Idle breathing glow (infinite, slow, tight) */
.single-post h1.cyber-h1-locked {
  animation: cyberH1Breathe 4s ease-in-out infinite;
}
@keyframes cyberH1Breathe {
  0%, 100% { text-shadow: 0 0 4px rgba(0, 212, 255, 0.12); }
  50%      { text-shadow: 0 0 10px rgba(0, 212, 255, 0.25); }
}

/* Underline sweep — cyan-линия растягивается слева-направо после lock */
.single-post h1.cyber-h1-locked::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan), transparent);
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.4);
  animation: cyberH1Underline 1.0s var(--cyber-ease) forwards;
}
@keyframes cyberH1Underline {
  from { width: 0;   opacity: 0; }
  to   { width: 70%; opacity: 0.75; }
}

/* ──────────────── post-meta-top — fade + letter-spacing открывается ──────────────── */
.cyber-meta-in {
  animation: cyberMetaIn 0.75s var(--cyber-ease) 0.1s forwards;
}
@keyframes cyberMetaIn {
  from { opacity: 0; letter-spacing: 0.05em; }
  to   { opacity: 1; letter-spacing: 0.15em; }
}

/* ──────────────── Cover / inline images — smooth CRT power-on (усиленный) ────────────────
 * Имитация ЭЛТ-монитора: тонкая горизонтальная линия → разворачивается до full image,
 * brightness peak в середине → settles to normal, saturate 0 → 1.
 * Сделан медленнее (1.6s) и более dramatic (saturate(0)→saturate(1.2)→1, brightness 2.2 peak)
 * чтобы эффект был обнаружимым а не subtle. */
.cyber-crt {
  animation: cyberCRTOn 1.6s var(--cyber-ease) both;
  transform-origin: center center;
}
@keyframes cyberCRTOn {
  0%   { opacity: 0;    filter: brightness(0.3) contrast(2.2) saturate(0) hue-rotate(20deg) blur(2px); transform: scaleY(0.02) scaleX(1.06); }
  20%  { opacity: 0.7;  filter: brightness(0.8) contrast(2.0) saturate(0) hue-rotate(15deg) blur(1px); transform: scaleY(0.4)  scaleX(1.06); }
  40%  { opacity: 1;    filter: brightness(2.2) contrast(1.6) saturate(0.3) hue-rotate(8deg) blur(0);   transform: scaleY(1.02) scaleX(1.04); }
  65%  { opacity: 1;    filter: brightness(1.4) contrast(1.2) saturate(1.05);                          transform: scaleY(1) scaleX(1.01); }
  100% { opacity: 1;    filter: none;                                                                  transform: none; }
}

/* Replay button для comparison demo */
.cyber-crt-replay {
  display: inline-block;
  margin-top: 8px;
  padding: 5px 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--cyan);
  background: transparent;
  border: 1px solid var(--cyan);
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.2s var(--cyber-ease);
}
.cyber-crt-replay:hover {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.4);
}

/* ──────────────── h2/h3 — smooth slide + cyan underline sweep (усиленный) ──────────────── */
.cyber-glitch {
  position: relative;
  animation: cyberHeadIn 0.85s var(--cyber-ease) forwards;
}
@keyframes cyberHeadIn {
  from { opacity: 0; transform: translateX(-32px); }
  to   { opacity: 1; transform: translateX(0); }
}
.cyber-glitch::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--cyan) 0%, var(--cyan) 50%, transparent 100%);
  box-shadow: 0 0 12px rgba(0, 212, 255, 0.7), 0 0 24px rgba(0, 212, 255, 0.3);
  animation: cyberHeadUnderline 1.1s var(--cyber-ease) 0.25s forwards;
  opacity: 0;
}
@keyframes cyberHeadUnderline {
  from { width: 0;   opacity: 0; }
  60%  { width: 85%; opacity: 1; }
  to   { width: 70%; opacity: 0.6; }
}

/* ──────────────── Code blocks — smooth clip + cyan glow pulse + scanline ──────────────── */
.cyber-scan {
  position: relative;
  animation: cyberCodeIn 1.3s var(--cyber-ease) forwards;
}
@keyframes cyberCodeIn {
  from { opacity: 0; transform: translateY(28px); clip-path: inset(0 0 100% 0); box-shadow: 0 0 0 rgba(0, 212, 255, 0); }
  40%  { box-shadow: 0 0 40px rgba(0, 212, 255, 0.45), 0 0 70px rgba(0, 212, 255, 0.2); }
  to   { opacity: 1; transform: translateY(0);    clip-path: inset(0 0 0% 0);   box-shadow: 0 0 0 rgba(0, 212, 255, 0); }
}
/* Бегущая cyan-линия (smooth, не нервная — теперь cubic-bezier slow) */
.cyber-scan::before {
  content: '';
  position: absolute; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  box-shadow: 0 0 18px var(--cyan), 0 0 36px rgba(0, 212, 255, 0.6);
  pointer-events: none;
  animation: cyberCodeScanline 1.3s var(--cyber-ease) forwards;
}
@keyframes cyberCodeScanline {
  0%   { top: 0;    opacity: 0; }
  20%  { top: 0;    opacity: 1; }
  85%  { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}
/* :after disable */
.cyber-scan::after { display: none; }

/* ──────────────── Paragraphs — soft fade-up ──────────────── */
.cyber-stutter-p {
  animation: cyberPIn 0.7s var(--cyber-ease) forwards;
}
@keyframes cyberPIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ──────────────── blockquote / lists — slide-x ──────────────── */
.cyber-stutter-x {
  animation: cyberSlideX 0.8s var(--cyber-ease) forwards;
}
@keyframes cyberSlideX {
  from { opacity: 0; transform: translateX(-18px); }
  to   { opacity: 1; transform: translateX(0); }
}

/* ──────────────── post-nav — soft fade-up ──────────────── */
.cyber-flicker {
  animation: cyberNavIn 0.7s var(--cyber-ease) forwards;
}
@keyframes cyberNavIn {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ──────────────── Sticky h2 (chapter heading — CSS sticky, не GSAP pin) ────────────────
   position:sticky держит h2 в потоке документа.
   Фон — ВСЕГДА непрозрачный (не только при is-pinned), чтобы контент не просвечивал
   в момент залипания до того как GSAP добавит класс.
   .is-pinned добавляет только визуальный акцент: cyan-бордер, тень, blur. */
.single-post .post-content .post-section > h2 {
  position: sticky;
  top: var(--nav-h, 86px); /* JS обновляет --nav-h через ResizeObserver */
  z-index: 5;
  padding: 8px 0 8px 14px;
  margin-left: -14px;
  border-left: 2px solid transparent;
  background: rgba(3, 7, 18, 0.97); /* всегда непрозрачный */
  transition: top 0.32s cubic-bezier(0.22, 1, 0.36, 1),
              border-color 0.3s var(--cyber-ease),
              box-shadow 0.3s var(--cyber-ease);
}
/* При скрытой шапке h2 прижимается к верху — нет пустого пространства */
body:has(nav.top.nav-hidden) .single-post .post-content .post-section > h2 {
  top: 6px;
}
.single-post .post-content .post-section > h2.is-pinned {
  border-left-color: var(--cyan);
  border-bottom: 1px solid rgba(0, 212, 255, 0.15);
  box-shadow: inset 14px 0 32px rgba(0, 212, 255, 0.06), 0 6px 28px rgba(3, 7, 18, 0.95);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.single-post .post-content .post-section > h2.is-pinned::before {
  content: '▸ ACTIVE SECTION';
  position: absolute;
  right: 0; top: 50%; transform: translateY(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: 0.15em;
  color: var(--cyan);
  opacity: 0.65;
  text-transform: uppercase;
}

/* ──────────────── Reading progress meter ──────────────── */
.read-meter {
  position: fixed;
  top: 12px;
  right: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  background: rgba(3, 7, 18, 0.7);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 5px 9px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 100;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.4s var(--cyber-ease);
}
.read-meter.is-active { opacity: 1; }
.read-meter .pct { color: var(--cyan); font-weight: 600; }

/* ──────────────── .no-anim — opt-out marker для demo сравнений ──────────────── */
/* Перебивает pre-hide CSS opacity:0 и блокирует все cyber-* анимации. */
.single-post .no-anim,
.single-post img.no-anim {
  opacity: 1 !important;
  animation: none !important;
  transform: none !important;
  filter: none !important;
  clip-path: none !important;
}

/* ──────────────── Reduced motion: всё instant ──────────────── */
@media (prefers-reduced-motion: reduce) {
  /* Decoder spans invisible in reduced-motion — GSAP failed fallback shows h1 cleanly */
  .h1-dc { color: inherit !important; }
  .h1-dc::before { content: none !important; }
  .single-post h1.cyber-h1-locked {
    text-shadow: none !important;
    animation: none !important;
  }
  .single-post h1.cyber-h1-locked::after { display: none; }
  .cyber-h1-in {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .cyber-meta-in,
  .cyber-crt,
  .cyber-glitch,
  .cyber-glitch::after,
  .cyber-scan,
  .cyber-stutter-p,
  .cyber-stutter-x,
  .cyber-flicker {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
    filter: none !important;
    width: auto !important;
    box-shadow: none !important;
  }
  .read-meter { display: none; }
  .single-post .post-content .post-section > h2 { transition: none !important; }
}