/* ===== Reset & Variables ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #0a0a1a;
  --text: #ffffff;
  --text-muted: #8890a8;
  --lobster-red: #E74C3C;
  --ocean-blue: #3498DB;
  --deep-blue: #2C3E50;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-blur: 20px;
  --font-sans: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

html {
  font-size: 16px;
  overflow: hidden;
  height: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  height: 100%;
  margin: 0;
}

strong {
  color: var(--lobster-red);
  font-weight: 700;
}

/* ===== Particle Canvas ===== */
#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ===== Slide Deck ===== */
#deck {
  position: relative;
  z-index: 1;
  height: 100vh;
  height: 100dvh;
  overflow-y: auto;
  scroll-snap-type: y mandatory;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

.slide {
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.slide-content {
  max-width: 1100px;
  width: 100%;
  padding: 24px 48px;
  text-align: center;
  position: relative;
  z-index: 2;
  max-height: 100vh;
  max-height: 100dvh;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: none;
}
.slide-content::-webkit-scrollbar { display: none; }

/* ===== Dot Navigation ===== */
#dot-nav {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

#dot-nav button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  cursor: pointer;
  padding: 0;
  transition: all 0.3s ease;
}

#dot-nav button:hover {
  border-color: rgba(255, 255, 255, 0.7);
}

#dot-nav button.active {
  background: var(--lobster-red);
  border-color: var(--lobster-red);
  transform: scale(1.3);
}

/* ===== Slide Counter ===== */
#slide-counter {
  position: fixed;
  bottom: 24px;
  right: 28px;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.05em;
}

/* ===== Fullscreen Hint ===== */
#fs-hint {
  position: fixed;
  bottom: 24px;
  left: 28px;
  z-index: 1000;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.25);
  transition: opacity 0.5s;
}

#fs-hint kbd {
  display: inline-block;
  padding: 2px 7px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

/* ===== Animations ===== */
.anim-in {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.anim-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.anim-in.delay-1 { transition-delay: 0.15s; }
.anim-in.delay-2 { transition-delay: 0.3s; }
.anim-in.delay-3 { transition-delay: 0.45s; }

/* ===== Slide 1: Cover ===== */
.slide-cover {
  background: radial-gradient(ellipse at center, rgba(231, 76, 60, 0.08) 0%, transparent 60%);
}

.mega-title {
  font-size: clamp(3.5rem, 10vw, 7rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.emoji-pop {
  display: inline-block;
  animation: float 3s ease-in-out infinite;
}

.tagline {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--lobster-red);
  margin-bottom: 12px;
}

.subtitle {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-muted);
  margin-bottom: 32px;
}

.speaker {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.3);
  font-weight: 500;
  padding: 12px 32px;
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  display: inline-block;
}

/* ===== Slide 2: What is OpenClaw ===== */
.hero-sentence {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 32px;
}

.bullet-row {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
}

.bullet-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px 24px;
  width: 220px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s, border-color 0.3s;
}

.bullet-card:hover {
  transform: translateY(-4px);
  border-color: rgba(52, 152, 219, 0.3);
}

.bullet-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.bullet-text {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-muted);
}

/* ===== Slide headings ===== */
.slide h2 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.slide-tagline {
  font-size: clamp(1rem, 2vw, 1.3rem);
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* ===== Slide 3: Architecture ===== */
.arch-diagram {
  max-width: 950px;
  margin: 0 auto;
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.arch-svg {
  width: 100%;
  height: auto;
}

.arch-svg text {
  font-family: var(--font-sans);
}

.conn-line {
  stroke-dasharray: 8 4;
  animation: dash-flow 2s linear infinite;
}

.conn-right {
  animation-direction: reverse;
}

@keyframes dash-flow {
  to { stroke-dashoffset: -24; }
}

/* ===== Slide 4: Gateway — Feature Grid ===== */
.feature-grid {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
}

.feature-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px 24px;
  width: 240px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s, border-color 0.3s;
}

.feature-item:hover {
  transform: translateY(-4px);
  border-color: rgba(230, 126, 34, 0.3);
}

.feature-icon {
  font-size: 2rem;
  margin-bottom: 10px;
}

.feature-label {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* ===== Slide 5: Agent Loop ===== */
.agent-loop {
  margin-bottom: 24px;
}

.loop-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  flex-wrap: wrap;
}

.loop-step-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 14px 14px;
  min-width: 80px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s;
}

.loop-step-item:hover {
  transform: scale(1.08);
}

.loop-emoji {
  display: block;
  font-size: 1.8rem;
  margin-bottom: 6px;
}

.loop-name {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}

.loop-arrow-text {
  font-size: 1.5rem;
  color: rgba(46, 204, 113, 0.5);
  font-weight: 700;
}

.agent-files {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.file-tag {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 8px 20px;
  border-radius: 50px;
  background: rgba(46, 204, 113, 0.1);
  border: 1px solid rgba(46, 204, 113, 0.25);
  color: #2ECC71;
}

/* ===== Slide 6: Two Column Layout ===== */
.two-col {
  display: flex;
  gap: 32px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 16px;
}

.col-panel {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 28px;
  width: 360px;
  text-align: left;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.col-panel h3 {
  font-size: 1.3rem;
  font-weight: 900;
  margin-bottom: 6px;
}

.panel-desc {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.panel-list {
  list-style: none;
}

.panel-list li {
  font-size: 0.95rem;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
}

.panel-list li:last-child {
  border-bottom: none;
}

.panel-list.icon-list li {
  font-size: 1.1rem;
  padding: 10px 0;
}

/* ===== Slide 7: Memory Layers ===== */
.memory-layers {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.memory-layer {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px 22px;
  width: 200px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.mem-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.mem-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.mem-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.memory-divider {
  font-size: 2rem;
  color: rgba(142, 68, 173, 0.5);
  font-weight: 700;
}

.memory-timeline {
  display: flex;
  gap: 16px;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.timeline-tag {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 8px 20px;
  border-radius: 50px;
  background: rgba(142, 68, 173, 0.1);
  border: 1px solid rgba(142, 68, 173, 0.25);
  color: #8E44AD;
}

.timeline-arrow {
  font-size: 1.2rem;
  color: rgba(142, 68, 173, 0.4);
}

/* ===== Slide 8: Skills Tiers ===== */
.skills-tiers {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.tier-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 28px;
  width: 200px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s;
}

.tier-card:hover {
  transform: translateY(-4px);
}

.tier-num {
  font-size: 2.2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--lobster-red);
  line-height: 1;
  margin-bottom: 12px;
}

.tier-name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.tier-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.standard-badge {
  display: inline-block;
}

.badge-label {
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: 12px 32px;
  border-radius: 50px;
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.25);
  color: var(--lobster-red);
  font-weight: 600;
}

/* ===== Slide 9: Multi-Agent ===== */
.multi-agent-visual {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.agent-persona {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px 22px;
  width: 160px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s;
}

.agent-persona:hover {
  transform: translateY(-4px);
}

.persona-avatar {
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.persona-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-muted);
}

.multi-agent-features {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.ma-tag {
  font-size: 0.9rem;
  padding: 8px 20px;
  border-radius: 50px;
  background: rgba(52, 152, 219, 0.1);
  border: 1px solid rgba(52, 152, 219, 0.25);
  color: var(--ocean-blue);
}

/* ===== Slide 10: Automation Grid ===== */
.auto-grid {
  display: flex;
  gap: 28px;
  justify-content: center;
  flex-wrap: wrap;
}

.auto-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 28px 24px;
  width: 180px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s;
}

.auto-item:hover {
  transform: translateY(-4px);
}

.auto-icon {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.auto-label {
  font-size: 1rem;
  font-weight: 600;
}

/* ===== Slide 12: Platforms Grid ===== */
.platform-grid {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}

.plat-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 22px 18px;
  width: 150px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  transition: transform 0.3s;
}

.plat-item:hover {
  transform: translateY(-4px);
}

.plat-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.plat-name {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.plat-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ===== Slide 13: Summary ===== */
.summary-grid {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.summary-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 24px 22px;
  width: 190px;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
}

.summary-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.summary-word {
  font-size: 1.3rem;
  font-weight: 900;
  margin-bottom: 8px;
}

.summary-detail {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.summary-slogan {
  font-size: clamp(1.2rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--lobster-red);
  letter-spacing: 0.05em;
}

/* ===== Slide 14: Thank You ===== */
.slide-thankyou {
  background: radial-gradient(ellipse at center, rgba(231, 76, 60, 0.06) 0%, transparent 60%);
}

.mega-thanks {
  font-size: clamp(3rem, 8vw, 5rem) !important;
  margin-bottom: 28px !important;
}

.thankyou-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  margin-bottom: 28px;
}

.link-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.1rem;
  color: var(--text-muted);
}

.link-icon {
  font-size: 1.3rem;
}

.qr-placeholder {
  display: inline-block;
}

.qr-box {
  width: 110px;
  height: 110px;
  border: 2px dashed rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.2);
  font-size: 0.9rem;
  margin: 0 auto;
}

/* ===== Keyframes ===== */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}

/* ===== Short viewport (laptops 768px height) ===== */
@media (max-height: 800px) {
  .slide-content {
    padding: 16px 40px;
  }
  .slide h2 {
    font-size: clamp(1.6rem, 4vw, 2.5rem);
    margin-bottom: 8px;
  }
  .slide-tagline {
    margin-bottom: 18px;
    font-size: 1rem;
  }
  .mega-title {
    font-size: clamp(2.8rem, 8vw, 5rem);
    margin-bottom: 14px;
  }
  .tagline { font-size: 1.3rem; margin-bottom: 8px; }
  .subtitle { margin-bottom: 24px; }
  .speaker { padding: 8px 24px; }
  .hero-sentence { margin-bottom: 24px; font-size: 1.2rem; }
  .bullet-card, .feature-item, .tier-card, .auto-item, .plat-item, .summary-item {
    padding: 18px 18px;
  }
  .bullet-icon, .feature-icon, .mem-icon, .auto-icon, .plat-icon, .summary-icon {
    font-size: 1.6rem;
    margin-bottom: 6px;
  }
  .col-panel { padding: 20px 22px; }
  .col-panel h3 { font-size: 1.1rem; }
  .panel-list li { padding: 4px 0; font-size: 0.88rem; }
  .memory-layer { padding: 18px 16px; }
  .persona-avatar { font-size: 2rem; }
  .loop-step-item { padding: 10px 10px; min-width: 70px; }
  .loop-emoji { font-size: 1.3rem; }
  .loop-name { font-size: 0.72rem; }
  .loop-arrow-text { font-size: 1.1rem; }
  .arch-diagram { padding: 12px; }
  .mega-thanks { font-size: 3rem !important; margin-bottom: 20px !important; }
  .qr-box { width: 90px; height: 90px; }
}

/* ===== Responsive (width) ===== */
@media (max-width: 900px) {
  .slide-content {
    padding: 32px 24px;
  }

  #dot-nav {
    right: 10px;
    gap: 7px;
  }

  #dot-nav button {
    width: 8px;
    height: 8px;
  }

  .mega-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
  }

  .bullet-row,
  .feature-grid,
  .skills-tiers,
  .auto-grid,
  .platform-grid,
  .summary-grid {
    gap: 16px;
  }

  .bullet-card,
  .feature-item,
  .memory-layer,
  .tier-card,
  .agent-persona,
  .auto-item,
  .plat-item,
  .summary-item {
    width: 100%;
    max-width: 280px;
  }

  .col-panel {
    width: 100%;
    max-width: 360px;
    padding: 28px 24px;
  }

  .arch-diagram {
    padding: 12px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .arch-svg {
    min-width: 600px;
  }

  .loop-step-item {
    padding: 14px 12px;
    min-width: 70px;
  }

  .loop-emoji {
    font-size: 1.4rem;
  }

  .loop-name {
    font-size: 0.75rem;
  }

  .loop-arrow-text {
    font-size: 1.1rem;
  }
}

@media (max-width: 600px) {
  .slide-content {
    padding: 24px 16px;
  }

  .slide h2 {
    font-size: 1.8rem;
  }

  .slide-tagline {
    font-size: 1rem;
    margin-bottom: 32px;
  }

  .mega-title {
    font-size: 2.5rem;
  }

  .tagline {
    font-size: 1.2rem;
  }

  .subtitle {
    font-size: 0.9rem;
  }

  .hero-sentence {
    font-size: 1.1rem;
  }

  .mega-thanks {
    font-size: 2.5rem !important;
  }

  #slide-counter {
    font-size: 0.7rem;
    right: 16px;
    bottom: 16px;
  }

  #fs-hint {
    display: none;
  }

  .memory-divider {
    font-size: 1.2rem;
  }
}