/* Deck template — single-page slide architecture (Netlify static) */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #000000;
  --surface: #0d0d0d;
  --surface2: #161616;
  --border: #222222;
  --border2: #2a2a2a;
  --text: #ffffff;
  --text2: #a1a1aa;
  --text3: #71717a;
  --accent: #7c3aed;
  --accent-light: #a78bfa;
  --accent-dim: rgba(124, 58, 237, 0.12);
  --accent-glow: rgba(124, 58, 237, 0.3);
  --green: #10b981;
  --amber: #f59e0b;
}

html {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text);
}

body {
  overflow: hidden;
  height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ── Boot intro overlay ── */
body.is-booting #progress-bar,
body.is-booting #nav-dots,
body.is-booting .arrow-btn,
body.is-booting #deck-ui,
body.is-booting #deck,
body.is-booting .deck-link,
body.is-booting .hint {
  opacity: 0 !important;
  pointer-events: none !important;
}

#boot {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 1000;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 28px;
}

.bootstack {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#boot.is-done {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s ease;
}

.bootline {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text2);
  user-select: none;
}

.bootline__typed {
  display: inline-block;
  min-height: 1em;
  color: var(--text2);
}

.bootline__caret {
  width: 9px;
  height: 18px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 18px var(--accent-glow);
  animation: bootblink 0.9s steps(1) infinite;
}

.bootline__caret.is-fading {
  animation: none;
  opacity: 0;
  transition: opacity 0.35s ease;
}

@keyframes bootblink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}

.bootlogo {
  display: inline-flex;
  align-items: center;
  opacity: 0;
  transform: translateY(2px) scale(0.98);
}

.bootlogo.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.bootlogo svg {
  height: 18px;
  width: auto;
  display: block;
}

.bootlogo img {
  height: 36px; /* 2× bigger than before */
  width: auto;
  display: block;
}

/* ── Slide engine ── */
.slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: clamp(32px, 5vw, 72px) clamp(24px, 6vw, 96px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.45s ease, transform 0.45s ease;
  transform: translateY(16px);
  overflow: hidden;
}

.slide.active {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.slide__inner {
  width: min(1040px, 100%);
  max-height: 100%;
  overflow-y: auto;
  padding: 8px 4px 48px;
}

.slide--title .slide__inner {
  text-align: center;
  overflow: visible;
}

.slide--image .slide__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
}

.closing-type {
  display: none;
  flex-direction: column;
  gap: 14px;
  margin-top: 12px;
  align-items: center;
  text-align: center;
  padding-bottom: 18px;
}

.slide.active .closing-type {
  display: flex;
}

.closing-type__line {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.closing-type__link {
  color: var(--text2);
  text-decoration: none;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

.closing-type__link:hover {
  color: var(--text);
  text-decoration: underline;
  text-decoration-color: var(--accent-light);
}

.closing-type__caret {
  width: 9px;
  height: 18px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 18px var(--accent-glow);
  animation: bootblink 0.9s steps(1) infinite;
}

.closing-type__caret.is-fading {
  animation: none;
  opacity: 0;
  transition: opacity 0.35s ease;
}

.slide__kicker {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 16px;
}

.slide h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.slide h2 {
  font-size: clamp(1.35rem, 2.8vw, 2rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.slide p {
  color: var(--text2);
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.55;
  max-width: 52ch;
}

.slide p + p {
  margin-top: 0.75rem;
}

.slide ul {
  margin-top: 1rem;
  padding-left: 1.25rem;
  color: var(--text2);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.55;
}

.slide li + li {
  margin-top: 0.45rem;
}

.slide__meta {
  margin-top: 1.5rem;
  font-size: 12px;
  color: var(--text3);
}

.slide__figure {
  max-width: 100%;
  border-radius: 0;
  border: none;
  background: transparent;
  overflow: visible;
}

.slide__figure img {
  display: block;
  width: 100%;
  height: auto;
  max-height: min(72vh, 820px);
  object-fit: contain;
  image-rendering: auto;
}

.slide__caption {
  font-size: 13px;
  color: var(--text3);
  text-align: center;
  max-width: 60ch;
}

.deck-link {
  position: fixed;
  bottom: 88px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-light);
  text-decoration: none;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--border2);
  background: rgba(13, 13, 13, 0.85);
  backdrop-filter: blur(8px);
}

.deck-link:hover {
  border-color: var(--accent);
  color: var(--text);
}

.hint {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 90;
  font-size: 12px;
  color: var(--text3);
  pointer-events: none;
  text-align: center;
  max-width: 90vw;
}

/* Progress */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--accent-light));
  transition: width 0.35s ease;
  z-index: 100;
  box-shadow: 0 0 10px var(--accent-glow);
}

/* Nav dots */
#nav-dots {
  position: fixed;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 100;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border2);
  cursor: pointer;
  transition: background 0.25s, transform 0.25s;
  position: relative;
}

.dot:hover {
  background: var(--text3);
}

.dot.active {
  background: var(--accent);
  transform: scale(1.45);
}

.dot .dot-label {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text2);
  font-size: 10px;
  font-weight: 500;
  white-space: nowrap;
  padding: 3px 8px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.dot:hover .dot-label {
  opacity: 1;
}

/* Arrows */
.arrow-btn {
  position: fixed;
  bottom: 28px;
  z-index: 100;
  background: var(--surface);
  border: 1px solid var(--border2);
  color: var(--text2);
  width: 42px;
  height: 42px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.arrow-btn:hover {
  color: var(--text);
  border-color: var(--accent);
  background: var(--accent-dim);
}

#prev-btn {
  left: 28px;
}

#next-btn {
  right: 28px;
}

/* Counter + present */
#deck-ui {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text3);
}

#present-btn {
  border: 1px solid var(--border2);
  background: var(--surface);
  color: var(--text2);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

#present-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

body.is-present .hint,
body.is-present .deck-link,
body.is-present #nav-dots,
body.is-present #deck-ui {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

body.is-present .arrow-btn {
  opacity: 0.35;
}

body.is-present .arrow-btn:hover {
  opacity: 1;
}

@media (max-width: 640px) {
  #nav-dots {
    display: none;
  }
}