/**
 * Pulsar Glass — Liquid Glass Segmented Slider
 * Version: 1.0.0
 *
 * Self-contained CSS. No external dependencies.
 * Prefix: .pg-  (PulsarGlass)
 *
 * Usage:
 *   <link rel="stylesheet" href="pulsar-glass.css">
 *
 * Theme: Add data-pg-theme="light" to any ancestor element to switch to light mode.
 * Or use the JS API: PulsarGlass.setTheme('light' | 'dark')
 *
 * MIT License
 */

/* ─── CSS Custom Properties ──────────────────────────────────────────────────── */

:root,
[data-pg-theme="dark"],
[data-theme="dark"] {
  /* Track (the groove / bezel) */
  --pg-track-bg:             rgba(15, 23, 42, 0.55);
  --pg-track-border:         rgba(255, 255, 255, 0.07);
  --pg-track-shadow:
    inset 0 2px 4px rgba(0, 0, 0, 0.45),
    inset 0 -1px 1px rgba(255, 255, 255, 0.04),
    0 4px 14px rgba(0, 0, 0, 0.2);
  --pg-track-radius:         13px;
  --pg-track-padding:        3px;
  --pg-track-blur:           blur(16px) saturate(180%);

  /* Slider lens body */
  --pg-lens-bg:
    linear-gradient(135deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.01) 50%, rgba(255,255,255,0.03) 100%),
    rgba(13, 148, 136, 0.06);
  --pg-lens-blur:            blur(16px) saturate(200%) contrast(108%) brightness(105%);
  --pg-lens-border:          rgba(255, 255, 255, 0.10);
  --pg-lens-radius:          11px;
  --pg-lens-shadow:
    inset 0 0.5px 1px 0   rgba(255, 255, 255, 0.45),
    inset 1px 0 1.5px -0.5px rgba(56, 189, 248, 0.35),
    inset -1px 0 1.5px -0.5px rgba(45, 212, 191, 0.30),
    inset 0 -1px 1px 0   rgba(0, 0, 0, 0.25),
    inset 0 0 10px 0     rgba(255, 255, 255, 0.04),
    0 6px 18px rgba(0, 0, 0, 0.30),
    0 0 0 0 rgba(56, 189, 248, 0);
  --pg-lens-shadow-pressed:
    inset 0 0.5px 1px 0   rgba(255, 255, 255, 0.55),
    inset 1.2px 0 2px -0.5px rgba(56, 189, 248, 0.40),
    inset -1.2px 0 2px -0.5px rgba(45, 212, 191, 0.35),
    inset 0 -1px 1.5px 0  rgba(0, 0, 0, 0.30),
    inset 0 0 10px 0     rgba(255, 255, 255, 0.06),
    0 4px 12px rgba(0, 0, 0, 0.32);
  --pg-lens-shadow-dragging:
    inset 0 0.5px 1.5px 0 rgba(255, 255, 255, 0.65),
    inset 2px 0 2.5px -0.5px rgba(56, 189, 248, 0.45),
    inset -2px 0 2.5px -0.5px rgba(45, 212, 191, 0.40),
    inset 0 -1.5px 2px 0 rgba(0, 0, 0, 0.35),
    inset 0 0 12px 0     rgba(255, 255, 255, 0.08),
    0 12px 28px rgba(0, 0, 0, 0.45);
  --pg-lens-shadow-overshoot:
    inset 0 0.5px 1.5px 0 rgba(255, 255, 255, 0.65),
    inset 2px 0 2.5px -0.5px rgba(56, 189, 248, 0.45),
    inset -2px 0 2.5px -0.5px rgba(45, 212, 191, 0.40),
    inset 0 -1.5px 2px 0 rgba(0, 0, 0, 0.35),
    inset 0 0 12px 0     rgba(255, 255, 255, 0.08),
    0 16px 36px rgba(0, 0, 0, 0.55);

  /* Button labels */
  --pg-btn-color:            #94a3b8;
  --pg-btn-hover-color:      #f1f5f9;
  --pg-btn-active-color:     #ffffff;
  --pg-btn-font-size:        12.5px;
  --pg-btn-font-weight:      600;
  --pg-btn-padding:          6px 16px;
  --pg-btn-min-width:        66px;
  --pg-btn-radius:           10px;

  /* Specular highlight (top of lens) */
  --pg-crest-color-left:     rgba(56, 189, 248, 0.25);
  --pg-crest-color-center:   rgba(255, 255, 255, 0.70);
  --pg-crest-color-right:    rgba(45, 212, 191, 0.25);
  --pg-specular-color:       rgba(255, 255, 255, 0.20);
}

/* ─── Light Theme Overrides ─────────────────────────────────────────────────── */

[data-pg-theme="light"],
[data-theme="light"] {
  --pg-track-bg:           rgba(226, 232, 240, 0.65);
  --pg-track-border:       rgba(0, 0, 0, 0.08);
  --pg-track-shadow:
    inset 0 2px 4px rgba(0, 0, 0, 0.06),
    0 2px 8px rgba(0, 0, 0, 0.04);

  /* Slider Lens Body: Ultra-Clean Frosted White Crystal */
  --pg-lens-bg:
    linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.75) 100%),
    rgba(255, 255, 255, 0.40);
  --pg-lens-blur:            blur(16px) saturate(180%) contrast(105%);
  --pg-lens-border:          rgba(255, 255, 255, 0.95);

  /* Durgun Hal: Saf kristal cam kırılması, incecik mikro-refraksiyon */
  --pg-lens-shadow:
    inset 0 1px 1px 0 rgba(255, 255, 255, 1),
    inset 0.5px 0 1px -0.5px rgba(56, 189, 248, 0.12),
    inset -0.5px 0 1px -0.5px rgba(45, 212, 191, 0.10),
    inset 0 -1px 1px 0 rgba(0, 0, 0, 0.03),
    inset 0 0 10px 0 rgba(255, 255, 255, 0.50),
    0 3px 10px rgba(15, 23, 42, 0.06),
    0 1px 3px rgba(15, 23, 42, 0.03);

  /* Basılma Hali (Pressed): Asil, berrak dokunsal derinlik + çok zarif prizma pırıltısı */
  --pg-lens-shadow-pressed:
    inset 0 1px 1.2px 0 rgba(255, 255, 255, 1),
    inset 1px 0 1.2px -0.5px rgba(56, 189, 248, 0.25),
    inset -1px 0 1.2px -0.5px rgba(251, 146, 60, 0.18),
    inset 0 -1px 1px 0 rgba(0, 0, 0, 0.04),
    inset 0 0 12px 0 rgba(255, 255, 255, 0.60),
    0 4px 12px rgba(15, 23, 42, 0.08),
    0 1px 3px rgba(15, 23, 42, 0.04);

  /* Sürükleme Hali (Hareket Modu / Dragging): Havalanan berrak cam, incecik safir/amber prizma kırılması */
  --pg-lens-shadow-dragging:
    inset 0 1.2px 1.5px 0 rgba(255, 255, 255, 1),
    inset 1.2px 0 1.5px -0.5px rgba(56, 189, 248, 0.30),
    inset -1.2px 0 1.5px -0.5px rgba(251, 146, 60, 0.22),
    inset 0 -1px 1px 0 rgba(0, 0, 0, 0.05),
    inset 0 0 14px 0 rgba(255, 255, 255, 0.70),
    0 10px 24px rgba(15, 23, 42, 0.10),
    0 2px 6px rgba(15, 23, 42, 0.05);

  /* Sınır Aşımı (Overshoot): Sıfır parlama / sıfır dış aura! Sadece doğal derinlik ve elastik gerilim */
  --pg-lens-shadow-overshoot:
    inset 0 1.2px 1.5px 0 rgba(255, 255, 255, 1),
    inset 1.2px 0 1.5px -0.5px rgba(56, 189, 248, 0.30),
    inset -1.2px 0 1.5px -0.5px rgba(251, 146, 60, 0.22),
    inset 0 -1px 1px 0 rgba(0, 0, 0, 0.05),
    inset 0 0 14px 0 rgba(255, 255, 255, 0.70),
    0 10px 24px rgba(15, 23, 42, 0.10),
    0 2px 6px rgba(15, 23, 42, 0.05);

  --pg-btn-color:            #64748b;
  --pg-btn-hover-color:      #0f172a;
  --pg-btn-active-color:     #0f172a;

  /* Tepe Speküler Pırıltı ve Çizgisi: Üst pah üzerinde incecik kristal gökkuşağı kırılması */
  --pg-crest-color-left:     rgba(56, 189, 248, 0.35);
  --pg-crest-color-center:   rgba(255, 255, 255, 0.95);
  --pg-crest-color-right:    rgba(251, 146, 60, 0.25);
  --pg-specular-color:       rgba(255, 255, 255, 0.40);
}

/* Light Mode: Hareket modunda aşırı kalın renk yaratan SVG filtresini devreden çıkar */
[data-pg-theme="light"] .pg-slider.pg-has-refract,
[data-pg-theme="light"] .pg-slider.pg-pressed,
[data-pg-theme="light"] .pg-track.pg-dragging .pg-slider,
[data-theme="light"] .pg-slider.pg-has-refract,
[data-theme="light"] .pg-slider.pg-pressed,
[data-theme="light"] .pg-track.pg-dragging .pg-slider {
  filter: none !important;
  -webkit-filter: none !important;
}

/* Light Mode: Sürükleme ve basılma anında pürüzsüz beyaz kenarlık */
[data-pg-theme="light"] .pg-slider.pg-pressed,
[data-theme="light"] .pg-slider.pg-pressed,
[data-pg-theme="light"] .pg-track.pg-dragging .pg-slider,
[data-theme="light"] .pg-track.pg-dragging .pg-slider {
  border-color: rgba(255, 255, 255, 0.95) !important;
}

/* ─── Track (Glass Tray / Bezel) ─────────────────────────────────────────────── */

.pg-track {
  position:  relative;
  display:   inline-flex;
  align-items: center;
  background: var(--pg-track-bg);
  backdrop-filter: var(--pg-track-blur);
  -webkit-backdrop-filter: var(--pg-track-blur);
  padding:   var(--pg-track-padding);
  border-radius: var(--pg-track-radius);
  border:    0.5px solid var(--pg-track-border);
  box-shadow: var(--pg-track-shadow);
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  cursor:    pointer;
  overflow:  visible;
}

.pg-track.pg-dragging {
  cursor: grabbing;
}

/* ─── Slider Lens — 6-Layer Optical Glass Body ───────────────────────────────── */

.pg-slider {
  position:  absolute;
  top:       var(--pg-track-padding);
  bottom:    var(--pg-track-padding);
  left:      0;
  width:     0;
  border-radius: var(--pg-lens-radius);
  background: var(--pg-lens-bg);
  backdrop-filter: var(--pg-lens-blur);
  -webkit-backdrop-filter: var(--pg-lens-blur);
  filter: none;
  -webkit-filter: none;
  border:    0.5px solid var(--pg-lens-border);
  box-shadow: var(--pg-lens-shadow);
  pointer-events: none;
  z-index:   1;
  opacity:   1;
  transform-origin: center center;
  transition:
    transform 0.48s cubic-bezier(0.19, 1.35, 0.32, 1),
    width     0.48s cubic-bezier(0.19, 1.35, 0.32, 1),
    opacity   0.20s ease,
    box-shadow 0.48s cubic-bezier(0.16, 1, 0.3, 1),
    border-color 0.48s ease;
  will-change: transform, width;
}

/* Layer 5: Fixed Specular Highlight (top of lens, cursor-independent) */
.pg-slider::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    ellipse 80% 65% at 50% 15%,
    var(--pg-specular-color) 0%,
    rgba(255, 255, 255, 0.04) 45%,
    transparent 80%
  );
  pointer-events: none;
  opacity: 0.9;
}

/* Layer 6: Ultra-Fine Crest Flare (horizontal hairline at top edge) */
.pg-slider::after {
  content: '';
  position: absolute;
  top: 0;
  left: 8%;
  right: 8%;
  height: 0.5px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--pg-crest-color-left) 15%,
    var(--pg-crest-color-center) 50%,
    var(--pg-crest-color-right) 85%,
    transparent 100%
  );
  pointer-events: none;
  opacity: 0.6;
}

/* State: Pressed / Dragging */
.pg-slider.pg-pressed {
  box-shadow: var(--pg-lens-shadow-pressed);
  border-color: rgba(255, 255, 255, 0.18);
}

/* SVG filter active during drag / flight (chromatic aberration) */
.pg-slider.pg-has-refract,
.pg-slider.pg-pressed,
.pg-track.pg-dragging .pg-slider {
  filter: url(#pulsar-glass-refract);
  -webkit-filter: url(#pulsar-glass-refract);
}

/* State: Dragging */
.pg-track.pg-dragging .pg-slider {
  box-shadow: var(--pg-lens-shadow-dragging);
  border-color: rgba(255, 255, 255, 0.22);
}

/* State: Elastic overshoot (rubber-banding beyond bounds) */
.pg-slider.pg-overshooting {
  box-shadow: var(--pg-lens-shadow-overshoot);
  border-color: rgba(255, 255, 255, 0.22);
}

/* State: Spring-back releasing */
.pg-slider.pg-releasing {
  will-change: transform, width, box-shadow;
}

/* ─── Buttons ─────────────────────────────────────────────────────────────────── */

.pg-btn {
  position:  relative;
  z-index:   2;
  padding:   var(--pg-btn-padding);
  min-width: var(--pg-btn-min-width);
  text-align: center;
  border-radius: var(--pg-btn-radius);
  border:    none;
  background: transparent;
  color:     var(--pg-btn-color);
  font-size: var(--pg-btn-font-size);
  font-weight: var(--pg-btn-font-weight);
  cursor:    pointer;
  transition:
    color      0.36s cubic-bezier(0.16, 1, 0.3, 1),
    text-shadow 0.36s ease;
  white-space: nowrap;
  outline: none;
  user-select: none;
  -webkit-user-select: none;
  /* Restore pointer events (track has touch-action: none) */
  touch-action: none;
}

.pg-btn:focus-visible {
  outline: 2px solid rgba(56, 189, 248, 0.6);
  outline-offset: 2px;
}

.pg-btn:hover {
  color: var(--pg-btn-hover-color);
}

/* Active and illuminated (lens passing over) */
.pg-btn.active,
.pg-btn.pg-illuminated {
  color:       var(--pg-btn-active-color) !important;
  font-weight: 600;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
  background:  transparent !important;
  border-color: transparent !important;
  box-shadow:  none !important;
}

/* ─── Button Label (inner span, carries water refraction) ───────────────────── */

.pg-label {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  position: relative;
  pointer-events: none;
  transform-origin: center center;
  transition:
    color      0.36s cubic-bezier(0.16, 1, 0.3, 1),
    transform  0.36s cubic-bezier(0.16, 1, 0.3, 1),
    filter     0.30s ease;
  will-change: transform;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

/* Lens sliding over label: underwater water refraction distortion */
.pg-label.pg-refracting {
  filter: url(#pulsar-glass-water);
  -webkit-filter: url(#pulsar-glass-water);
  transform: scale(1.04) translateY(-0.5px);
}

/* ─── Size Variants ──────────────────────────────────────────────────────────── */

/* Small (.pg-sm): Concentric 2.5px margin, 10px outer / 7.5px inner */
.pg-track.pg-sm {
  --pg-track-padding:  2.5px;
  --pg-track-radius:   10px;
  --pg-lens-radius:    7.5px;
  --pg-btn-padding:    4px 14px;
  --pg-btn-min-width:  60px;
  --pg-btn-font-size:  11.5px;
  --pg-btn-radius:     7.5px;
}

/* Large (.pg-lg): Concentric 4.5px margin, 16px outer / 11.5px inner */
.pg-track.pg-lg {
  --pg-track-padding:  4.5px;
  --pg-track-radius:   16px;
  --pg-lens-radius:    11.5px;
  --pg-btn-padding:    9px 24px;
  --pg-btn-min-width:  96px;
  --pg-btn-font-size:  14px;
  --pg-btn-radius:     11.5px;
}

/* ─── Accessibility: Reduced Motion ─────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .pg-slider {
    transition: none !important;
    transform: none !important;
  }
  .pg-label {
    transition: none !important;
    transform: none !important;
    filter: none !important;
  }
}

/* ─── Pulsar Glass Icons ─────────────────────────────────────────────────────── */
.pg-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  display: inline-block;
  vertical-align: middle;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.pg-btn:hover .pg-icon {
  transform: scale(1.12);
}

.pg-btn.active .pg-icon,
.pg-btn.pg-illuminated .pg-icon {
  transform: scale(1.05);
}

/* ─── Floating Table of Contents (Independent Floating Island Slider) ─── */
.header-toc-wrap {
  position: fixed !important;
  top: 88px !important;
  left: 0 !important;
  right: 0 !important;
  margin: 0 auto !important;
  z-index: 995 !important;
  display: flex !important;
  flex-direction: row !important;
  justify-content: center !important;
  align-items: center !important;
  width: max-content !important;
  max-width: calc(100% - 2rem) !important;
  padding: 0 !important;
  overflow: visible !important;
  box-sizing: border-box !important;
  pointer-events: auto !important;
  transform: translateZ(0) !important;
  -webkit-transform: translateZ(0) !important;
  will-change: transform !important;
  transition: top 0.4s cubic-bezier(0.19, 1, 0.22, 1), transform 0.4s ease, opacity 0.4s ease !important;
}

#heroNavSlider {
  margin: 0 auto !important;
  overflow: visible !important;
  flex-shrink: 0;
  box-shadow: 
    0 16px 36px -8px rgba(0, 0, 0, 0.60),
    0 2px 8px rgba(0, 0, 0, 0.30),
    0 0 20px -2px rgba(37, 99, 235, 0.15),
    inset 0 1px 1px rgba(255, 255, 255, 0.40),
    inset 0 -1px 2px rgba(0, 0, 0, 0.30) !important;
}

/* ─── Mobile Option 1: Expanding Pill / Dynamic Island Segmented Control ─────────── */
@media (max-width: 768px) {
  .header-toc-wrap {
    top: 76px !important;
    padding: 0 !important;
    margin: 0 auto !important;
    width: max-content !important;
    max-width: calc(100% - 1.5rem) !important;
    overflow: visible !important;
    contain: layout style !important;
    transform: translateZ(0) !important;
    -webkit-transform: translateZ(0) !important;
    will-change: transform !important;
  }

  .header-toc-wrap::-webkit-scrollbar {
    display: none !important;
    width: 0 !important;
    height: 0 !important;
  }

  #heroNavSlider,
  #heroNavSlider.pg-track {
    margin: 0 auto !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    overflow: visible !important;
    width: 282px !important;
    min-width: 282px !important;
    max-width: 282px !important;
    flex-shrink: 0 !important;
    touch-action: pan-y !important; /* Dikey sayfa kaydırmasını asla engelleme */
    contain: layout style !important;
    transform: translateZ(0) !important;
    -webkit-transform: translateZ(0) !important;
    will-change: transform !important;
    backdrop-filter: blur(16px) saturate(180%) !important;
    -webkit-backdrop-filter: blur(16px) saturate(180%) !important;
    background: rgba(10, 18, 35, 0.82) !important;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.40) !important;
    border: 0.5px solid rgba(255, 255, 255, 0.12) !important;
  }

  /* Slider merceği: Mobilde saf GPU donanım katmanı */
  #heroNavSlider .pg-slider {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.08) 100%) !important;
    border: 0.5px solid rgba(255, 255, 255, 0.28) !important;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25), inset 0 0.5px 1px rgba(255, 255, 255, 0.45) !important;
    will-change: transform !important;
  }

  /* Mobilde GPU'yu kilitleyen ağır SVG filtrelerini tamamen devreden çıkar */
  .pg-slider.pg-has-refract,
  .pg-slider.pg-pressed,
  .pg-track.pg-dragging .pg-slider,
  .pg-label.pg-refracting {
    filter: none !important;
    -webkit-filter: none !important;
  }

  #heroNavSlider .pg-btn {
    min-width: 0 !important;
    font-size: 12px !important;
    letter-spacing: -0.01em;
    cursor: pointer;
    box-sizing: border-box !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    white-space: nowrap !important;
    border-radius: var(--pg-btn-radius) !important;
    flex: 0 0 auto !important;
    touch-action: pan-y !important;
    user-select: none !important;
    -webkit-user-select: none !important;
  }

  /* Aktif olmayan buton: sabit 36px genişlik, kompakt ikon modu */
  #heroNavSlider .pg-btn:not(.active) {
    width: 36px !important;
    min-width: 36px !important;
    max-width: 36px !important;
    padding: 6px 0 !important;
    color: var(--pg-btn-color) !important;
    transition: width 0.22s cubic-bezier(0.16, 1, 0.3, 1), color 0.16s ease !important;
  }

  /* Aktif buton: sabit 96px genişlik, genişleyen hap modu */
  #heroNavSlider .pg-btn.active {
    width: 96px !important;
    min-width: 96px !important;
    max-width: 96px !important;
    padding: 6px 0 !important;
    color: var(--pg-btn-active-color) !important;
    transition: width 0.22s cubic-bezier(0.16, 1, 0.3, 1), color 0.16s ease !important;
  }

  #heroNavSlider .pg-label {
    gap: 0 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    will-change: auto !important;
  }

  #heroNavSlider .pg-icon {
    width: 14px !important;
    height: 14px !important;
    flex-shrink: 0 !important;
    display: inline-block !important;
  }

  /* Aktif olmayan etiket metni: pürüzsüz gizlenme */
  #heroNavSlider .pg-btn:not(.active) .pg-text,
  #heroNavSlider .pg-btn:not(.active) .pg-label > span:not(.pg-icon) {
    max-width: 0 !important;
    opacity: 0 !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding: 0 !important;
    overflow: hidden !important;
    pointer-events: none !important;
    white-space: nowrap !important;
    display: inline-block !important;
    vertical-align: middle !important;
    transition:
      max-width 0.22s cubic-bezier(0.16, 1, 0.3, 1),
      opacity 0.14s ease,
      margin-left 0.22s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }

  /* Aktif etiket metni: akıcı açılma */
  #heroNavSlider .pg-btn.active .pg-text,
  #heroNavSlider .pg-btn.active .pg-label > span:not(.pg-icon) {
    max-width: 72px !important;
    opacity: 1 !important;
    margin-left: 6px !important;
    margin-right: 0 !important;
    overflow: hidden !important;
    white-space: nowrap !important;
    display: inline-block !important;
    vertical-align: middle !important;
    transition:
      max-width 0.22s cubic-bezier(0.16, 1, 0.3, 1),
      opacity 0.16s cubic-bezier(0.16, 1, 0.3, 1),
      margin-left 0.22s cubic-bezier(0.16, 1, 0.3, 1) !important;
  }
}