/* =========================================================
   POP ART + APPLE-STYLE SCROLL REVEAL STYLESHEET
   OPC (One Person Company) Interactive H5 Presentation
   ========================================================= */

:root {
  --pop-yellow: #FFE600;
  --pop-yellow-light: #FFF59D;
  --pop-pink: #FF2A85;
  --pop-pink-light: #FF80B5;
  --pop-cyan: #00F0FF;
  --pop-cyan-light: #B2F5EA;
  --pop-green: #25E871;
  --pop-green-light: #B9F6CA;
  --pop-orange: #FF6B00;
  --pop-purple: #7928CA;
  --pop-purple-light: #E9D5FF;
  --pop-black: #111111;
  --pop-white: #FFFFFF;
  --pop-bg: #FFFDF4;
  --pop-gray: #E5E7EB;
  --pop-dark-gray: #4B5563;
  --pop-border: 3.5px solid #111111;
  --pop-border-sm: 2.5px solid #111111;
  --pop-border-lg: 5px solid #111111;
  --pop-shadow: 5px 5px 0px #111111;
  --pop-shadow-sm: 3px 3px 0px #111111;
  --pop-shadow-lg: 8px 8px 0px #111111;
  --pop-shadow-xl: 12px 12px 0px #111111;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background-color: var(--pop-bg);
  color: var(--pop-black);
  overflow-x: hidden;
  line-height: 1.6;
}

/* Ambient Apple-style Dynamic Glow in the Background */
.ambient-glow-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background: 
    radial-gradient(circle at 10% 20%, rgba(255, 230, 0, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 90% 40%, rgba(255, 42, 133, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 20% 80%, rgba(0, 240, 255, 0.12) 0%, transparent 45%),
    radial-gradient(circle at 80% 90%, rgba(37, 232, 113, 0.1) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Ben-Day Halftone Dots Pattern Overlay */
.bg-bended-dots {
  background-color: var(--pop-bg);
  background-image: radial-gradient(var(--pop-black) 14%, transparent 15%);
  background-size: 18px 18px;
}

/* =========================================================
   APPLE-STYLE SCROLL REVEAL ANIMATIONS
   ========================================================= */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(45px) scale(0.97);
  filter: blur(6px);
  transition: 
    opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.75s cubic-bezier(0.16, 1, 0.3, 1),
    filter 0.65s ease;
  will-change: opacity, transform, filter;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

/* Staggered Delay Helpers */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Scroll Section Spacing */
.scroll-section {
  position: relative;
  z-index: 10;
  margin-bottom: 2.5rem;
  padding-top: 0.5rem;
}

/* Core Pop Card & Box Styling */
.pop-box {
  background: var(--pop-white);
  border: var(--pop-border);
  box-shadow: var(--pop-shadow);
  border-radius: 16px;
  position: relative;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.pop-box-sm {
  border: var(--pop-border-sm);
  box-shadow: var(--pop-shadow-sm);
  border-radius: 10px;
}

.pop-box-lg {
  border: var(--pop-border-lg);
  box-shadow: var(--pop-shadow-lg);
  border-radius: 20px;
}

.pop-interactive:hover {
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0px #111;
}

.pop-interactive:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px #111;
}

/* Pop Buttons */
.pop-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  text-transform: uppercase;
  padding: 10px 20px;
  border: var(--pop-border);
  box-shadow: var(--pop-shadow);
  border-radius: 12px;
  cursor: pointer;
  background: var(--pop-yellow);
  color: var(--pop-black);
  user-select: none;
  transition: all 0.15s ease;
  text-decoration: none;
  font-size: 15px;
  gap: 6px;
}

.pop-btn:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0px #111;
}

.pop-btn:active {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0px #111;
}

.pop-btn-pink {
  background: var(--pop-pink);
  color: #fff;
}

.pop-btn-cyan {
  background: var(--pop-cyan);
  color: #111;
}

.pop-btn-green {
  background: var(--pop-green);
  color: #111;
}

.pop-btn-purple {
  background: var(--pop-purple);
  color: #fff;
}

.pop-btn-white {
  background: #fff;
  color: #111;
}

.pop-btn-black {
  background: #111;
  color: #fff;
}

/* Badges & Sticker Tags */
.pop-tag {
  display: inline-block;
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 800;
  border: 2px solid #111;
  border-radius: 6px;
  box-shadow: 2px 2px 0px #111;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tag-rotate-l {
  transform: rotate(-2.5deg);
}

.tag-rotate-r {
  transform: rotate(2.5deg);
}

/* Starburst / POW Badge */
.pop-starburst {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  background: var(--pop-yellow);
  clip-path: polygon(
    50% 0%, 63% 15%, 83% 8%, 84% 28%, 100% 35%, 89% 50%, 100% 65%, 84% 72%, 83% 92%, 63% 85%, 50% 100%, 37% 85%, 17% 92%, 16% 72%, 0% 65%, 11% 50%, 0% 35%, 16% 28%, 17% 8%, 37% 15%
  );
  border: 3px solid #111;
  font-weight: 900;
  font-size: 14px;
  text-align: center;
  color: #111;
  filter: drop-shadow(4px 4px 0px #111);
}

.pop-starburst-pink {
  background: var(--pop-pink);
  color: #fff;
}

/* Comic Speech Bubble */
.pop-bubble {
  position: relative;
  background: #fff;
  border: var(--pop-border);
  box-shadow: var(--pop-shadow);
  border-radius: 16px;
  padding: 16px 20px;
}

.pop-bubble::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 32px;
  border-width: 16px 14px 0 0;
  border-style: solid;
  border-color: #111 transparent transparent transparent;
  display: block;
  width: 0;
}

.pop-bubble::before {
  content: '';
  position: absolute;
  bottom: -11px;
  left: 35px;
  border-width: 12px 10px 0 0;
  border-style: solid;
  border-color: #fff transparent transparent transparent;
  display: block;
  width: 0;
  z-index: 2;
}

/* Pop Headline Typography */
.pop-title {
  font-weight: 900;
  letter-spacing: -0.5px;
  text-transform: uppercase;
  color: var(--pop-black);
  text-shadow: 2px 2px 0px var(--pop-yellow);
}

.pop-marker-yellow {
  background: linear-gradient(180deg, transparent 55%, var(--pop-yellow) 55%);
  padding: 0 4px;
  font-weight: 800;
}

.pop-marker-pink {
  background: linear-gradient(180deg, transparent 55%, var(--pop-pink-light) 55%);
  padding: 0 4px;
  font-weight: 800;
}

.pop-marker-cyan {
  background: linear-gradient(180deg, transparent 55%, var(--pop-cyan-light) 55%);
  padding: 0 4px;
  font-weight: 800;
}

/* Top Navbar & Header */
.top-navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: var(--pop-border);
  padding: 10px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}

.slide-viewport {
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 16px 120px 16px;
}

/* Custom Table in Neo-Brutalist Pop */
.pop-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  border: 3px solid #111;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 4px 4px 0px #111;
  margin: 12px 0;
  background: #fff;
}

.pop-table th {
  background: var(--pop-yellow);
  color: #111;
  font-weight: 900;
  padding: 10px 14px;
  border-bottom: 3px solid #111;
  border-right: 2px solid #111;
  font-size: 14px;
  text-align: left;
}

.pop-table th:last-child {
  border-right: none;
}

.pop-table td {
  padding: 10px 14px;
  border-bottom: 2px solid #111;
  border-right: 2px solid #111;
  font-size: 13.5px;
}

.pop-table td:last-child {
  border-right: none;
}

.pop-table tr:last-child td {
  border-bottom: none;
}

.pop-table tr:nth-child(even) {
  background: #FFFDF0;
}

/* Floating Action Dock */
.dock-nav {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: var(--pop-border);
  box-shadow: var(--pop-shadow-lg);
  padding: 8px 16px;
  border-radius: 40px;
}

/* Drawer / Modal styling */
.pop-drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.pop-drawer-overlay.open {
  display: flex;
  opacity: 1;
}

.pop-drawer-content {
  background: var(--pop-bg);
  border: var(--pop-border-lg);
  box-shadow: var(--pop-shadow-xl);
  border-radius: 20px;
  width: 92%;
  max-width: 680px;
  max-height: 88vh;
  margin: auto;
  overflow-y: auto;
  padding: 24px;
  position: relative;
}

/* Sliders & Inputs */
input[type="range"].pop-range {
  -webkit-appearance: none;
  width: 100%;
  height: 14px;
  background: #FFF59D;
  border: 2px solid #111;
  border-radius: 8px;
  outline: none;
  box-shadow: 2px 2px 0 #111;
}

input[type="range"].pop-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 28px;
  height: 28px;
  background: var(--pop-pink);
  border: 2.5px solid #111;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 2px 2px 0 #111;
  transition: transform 0.1s;
}

input[type="range"].pop-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.pop-input, .pop-textarea, .pop-select {
  width: 100%;
  padding: 10px 14px;
  font-size: 14px;
  border: 2.5px solid #111;
  border-radius: 8px;
  background: #fff;
  color: #111;
  box-shadow: 3px 3px 0 #111;
  outline: none;
  font-weight: 600;
  transition: box-shadow 0.15s ease;
}

.pop-input:focus, .pop-textarea:focus, .pop-select:focus {
  border-color: #111;
  box-shadow: 5px 5px 0 var(--pop-pink);
}

/* Progress bar */
.pop-progress-container {
  height: 6px;
  background: #E5E7EB;
  border-bottom: 2px solid #111;
  width: 100%;
  position: sticky;
  top: 56px;
  z-index: 99;
}
.pop-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--pop-yellow), var(--pop-pink), var(--pop-cyan));
  width: 0%;
  transition: width 0.1s ease-out;
}

/* Quick Floating Chapter Pill on Scroll */
.floating-chapter-pill {
  position: fixed;
  top: 70px;
  right: 18px;
  z-index: 80;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

/* Mobile fine-tuning */
@media (max-width: 640px) {
  :root {
    --pop-border: 2.5px solid #111;
    --pop-shadow: 3.5px 3.5px 0px #111;
    --pop-shadow-lg: 5px 5px 0px #111;
  }
  .slide-viewport {
    padding: 16px 12px 100px 12px;
  }
  .dock-nav {
    bottom: 12px;
    padding: 6px 12px;
    gap: 6px;
  }
  .pop-btn {
    padding: 7px 12px;
    font-size: 13px;
  }
  .pop-table th, .pop-table td {
    padding: 6px 8px;
    font-size: 11.5px;
  }
}