:root {
  --bg: #0a0e13;
  --bg-elev: #111821;
  --fg: #e8edf2;
  --fg-dim: #8a95a3;
  --accent: #4ade80;
  --accent-dim: #266e3a;
  --rule: #1c2530;
  --mono: "JetBrains Mono", "SF Mono", ui-monospace, Menlo, monospace;
  --sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 20px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

#deck {
  display: flex;
  height: 100vh;
  transition: transform 420ms cubic-bezier(.2, .7, .2, 1);
  will-change: transform;
}

.slide {
  flex: 0 0 100vw;
  width: 100vw;
  height: 100vh;
  padding: 6vh 6vw;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.2rem;
  position: relative;
  overflow: hidden;
}

/* Typography */
h1 { font-size: clamp(2.2rem, 5vw, 4rem); font-weight: 700; line-height: 1.05; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.3rem, 2.2vw, 1.8rem); font-weight: 600; letter-spacing: -0.015em; line-height: 1.2; }
h3 { font-size: clamp(1rem, 1.4vw, 1.2rem); font-weight: 600; }

.accent { color: var(--accent); }
em { font-style: normal; color: var(--accent); }
strong { color: var(--fg); font-weight: 600; }
.dim { color: var(--fg-dim); font-weight: 400; }
.white { color: #fff; }
.mono { font-family: var(--mono); }

.lede { font-size: clamp(1rem, 1.4vw, 1.2rem); color: var(--fg-dim); max-width: 60ch; }
.note { font-size: 0.85rem; color: var(--fg-dim); font-family: var(--mono); }
.eyebrow { font-family: var(--mono); font-size: 0.75rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.18em; }

/* =============================
   SLIDE 1: LANDING
   ============================= */
.slide.landing {
  background: radial-gradient(circle at 20% 10%, rgba(74, 222, 128, 0.08), transparent 60%),
              radial-gradient(circle at 80% 90%, rgba(74, 222, 128, 0.04), transparent 60%),
              var(--bg);
  color: var(--fg);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 3vh 5vw 4vh;
}
.slide.landing::before { display: none; }

.landing-header { text-align: center; }
.landing-header .eyebrow { margin-bottom: 0.3rem; }
.landing-name { color: var(--fg); position: relative; display: inline-block; }
.landing-sub {
  font-size: 0.95rem;
  color: var(--fg-dim);
  margin-top: 0.4rem;
  font-family: var(--mono);
  letter-spacing: 0.04em;
}

.name-link { color: inherit; text-decoration: none; position: relative; }
.name-link:hover { color: var(--accent); }
.name-popup {
  display: none;
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 0.6rem;
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.2rem 1.4rem;
  min-width: 320px;
  z-index: 20;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}
.name-link:hover .name-popup { display: flex; }
.popup-info { display: flex; flex-direction: column; gap: 0.2rem; text-align: left; }
.popup-info strong { font-size: 1rem; color: var(--fg); }
.popup-info span { font-size: 0.8rem; color: var(--fg-dim); font-family: var(--mono); }
.popup-link { color: var(--accent) !important; margin-top: 0.3rem; }

.landing-grid {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: auto 1fr auto auto;
  gap: 1.2rem;
}
.grid-footer {
  grid-column: 1 / -1;
  grid-row: 3;
}

.logo-chip {
  background: #fff;
  border-radius: 12px;
  width: 220px;
  height: 120px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
}
.logo-chip img { max-height: 100%; max-width: 100%; object-fit: contain; }

.corner-tl { grid-column: 1; grid-row: 1; justify-self: start; align-self: start; margin-left: 1vw; }
.corner-tr { grid-column: 3; grid-row: 1; justify-self: end;   align-self: start; }
.corner-bl { grid-column: 1; grid-row: 4; justify-self: start; align-self: end; }
.corner-br { grid-column: 3; grid-row: 4; justify-self: end;   align-self: end; }

.hero-shot {
  grid-column: 2; grid-row: 1 / 3;
  min-height: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  cursor: pointer;
}
.hero-shot > img {
  max-width: 110%;
  max-height: 110%;
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.4);
  transition: transform 200ms, box-shadow 200ms;
}
.hero-shot:hover > img {
  transform: scale(1.03);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.hero-caption {
  font-family: var(--mono);
  font-size: 0.55rem;
  color: var(--fg-dim);
  margin-top: 0.3rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.video-overlay {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex; align-items: center; justify-content: center;
  z-index: 100;
  opacity: 0; pointer-events: none;
  transition: opacity 300ms;
}
.video-overlay.active { opacity: 1; pointer-events: all; }
.video-overlay video { max-width: 80vw; max-height: 80vh; border-radius: 12px; }
.close-video {
  position: absolute; top: 2rem; right: 2rem;
  font-size: 2rem; color: #fff; cursor: pointer;
  opacity: 0.7; transition: opacity 150ms;
}
.close-video:hover { opacity: 1; }

.landing-footer {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--fg-dim);
  text-align: center;
}
.landing-footer strong { color: var(--fg); }

/* =============================
   SLIDE 2: WHERE AI IS GOING
   ============================= */
.slide-2 {
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 2.5rem;
  padding: 6vh 6vw;
}

.slide2-title {
  font-size: clamp(2.4rem, 5vw, 4rem);
}

.two-tiles {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  width: 100%;
  max-width: 1100px;
}

.tile {
  background: linear-gradient(135deg, var(--bg-elev), rgba(17, 24, 33, 0.6));
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 2.5rem 2.2rem;
  text-align: left;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: border-color 250ms, transform 250ms, box-shadow 250ms;
}
.tile::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity 250ms;
}
.tile:hover {
  border-color: var(--accent-dim);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}
.tile:hover::before { opacity: 1; }

.tile-number {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.tile h2 { margin-bottom: 1rem; }

.tile-teaser {
  font-size: 0.95rem;
  color: var(--fg-dim);
  line-height: 1.5;
  margin-bottom: 1.5rem;
}

.tile-more {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  transition: letter-spacing 200ms;
}
.tile:hover .tile-more { letter-spacing: 0.12em; }

/* =============================
   SLIDE 3: TAILSCALE = VERCEL OF LOCAL
   ============================= */
.slide-3 {
  justify-content: center;
  align-items: center;
  text-align: center;
  gap: 2rem;
  padding: 5vh 5vw;
}

.slide3-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.three-pillars {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.pillar {
  font-family: var(--mono);
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  font-weight: 600;
  color: var(--accent);
  padding: 0.5rem 1.4rem;
  border: 1px solid var(--accent-dim);
  border-radius: 100px;
  letter-spacing: 0.04em;
}

.slide3-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  width: 100%;
  max-width: 1100px;
  text-align: left;
}

.section-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  margin-bottom: 1rem;
}

/* Idea cards */
.idea-cards {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.idea-card {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 12px;
  padding: 1.1rem 1.3rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
  transition: border-color 200ms, transform 200ms;
}
.idea-card:hover {
  border-color: var(--accent-dim);
  transform: translateX(4px);
}
.idea-icon {
  font-size: 1.4rem;
  width: 2.2rem;
  text-align: center;
  flex-shrink: 0;
}
.idea-card strong {
  font-size: 0.95rem;
  display: block;
  margin-bottom: 0.1rem;
}
.idea-card span {
  font-size: 0.8rem;
  color: var(--fg-dim);
}

/* Future section */
.future-section {
  background: linear-gradient(135deg, var(--bg-elev), rgba(17, 24, 33, 0.6));
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 1.5rem 1.8rem;
  cursor: pointer;
  transition: border-color 250ms, transform 250ms;
}
.future-section:hover {
  border-color: var(--accent-dim);
  transform: translateY(-2px);
}

.future-items {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-bottom: 1.2rem;
}
.future-item {
  font-size: 0.95rem;
  color: var(--fg);
  padding-left: 1.2rem;
  position: relative;
}
.future-item::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-family: var(--mono);
}

/* Nav arrows */
.nav-arrow {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 60;
  background: none;
  border: none;
  color: var(--fg-dim);
  font-size: 3rem;
  font-weight: 200;
  cursor: pointer;
  line-height: 1;
  padding: 0.5rem;
  transition: color 150ms;
}
.nav-arrow:hover {
  color: var(--accent);
}
.nav-left { left: 1rem; }
.nav-right { right: 1rem; }

/* =============================
   MODAL
   ============================= */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(10, 14, 19, 0.9);
  backdrop-filter: blur(12px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 1;
  transition: opacity 200ms;
}
.modal.hidden { opacity: 0; pointer-events: none; }

.modal-content {
  background: var(--bg-elev);
  border: 1px solid var(--rule);
  border-radius: 16px;
  padding: 2.5rem 3rem;
  max-width: 720px;
  max-height: 80vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.4rem;
  font-size: 1.8rem;
  color: var(--fg-dim);
  cursor: pointer;
  transition: color 150ms;
}
.modal-close:hover { color: var(--fg); }

.modal-intro {
  font-size: 0.95rem;
  color: var(--fg-dim);
  line-height: 1.6;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--rule);
}

.modal-section {
  margin-bottom: 1.5rem;
}
.modal-section h3 {
  font-size: 1.05rem;
  color: var(--accent);
  margin-bottom: 0.4rem;
}
.modal-para {
  font-size: 0.9rem;
  color: var(--fg-dim);
  line-height: 1.6;
}

.modal-summary {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule);
  font-size: 0.9rem;
  color: var(--fg-dim);
  line-height: 1.6;
  font-style: italic;
}

/* =============================
   OVERVIEW (hidden)
   ============================= */
#overview { display: none; }

/* =============================
   RESPONSIVE
   ============================= */

/* Tablet */
@media (max-width: 1024px) {
  html, body { font-size: 17px; }
  .slide { padding: 4vh 5vw; gap: 1rem; }
  .slide.landing { padding: 3vh 4vw 3vh; }
  .logo-chip { width: 180px; height: 95px; padding: 0.7rem; }
  .tile { padding: 1.8rem 1.6rem; }
  .tile-teaser { font-size: 0.85rem; margin-bottom: 1rem; }
  .modal-content { padding: 2rem 2rem; max-width: 90vw; }
}

/* Mobile */
@media (max-width: 680px) {
  html, body { font-size: 15px; overflow-x: hidden; overflow-y: auto; }

  .slide { padding: 3vh 5vw; gap: 0.8rem; }
  .slide.landing { padding: 1vh 4vw 1vh; gap: 0.2rem; }

  /* Landing — stacked vertical */
  .landing-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
  }
  .hero-shot {
    order: 1;
    min-height: 0;
    height: auto;
    flex: none;
  }
  .hero-shot > img { max-width: 55%; max-height: 30vh; }
  .grid-footer { order: 2; text-align: center; }
  .corner-tl { order: 3; margin-left: 0; }
  .corner-tr { order: 4; }
  .corner-bl { order: 5; display: flex; }
  .corner-br { order: 6; display: flex; }
  .logo-chip { width: 90vw; height: 50px; padding: 0.4rem 1.2rem; border-radius: 8px; }
  .logo-chip img { max-height: 100%; max-width: 80%; }
  .landing-name { font-size: clamp(1.6rem, 8vw, 2.4rem) !important; }
  .landing-sub { font-size: 0.7rem; }
  .landing-footer { font-size: 0.75rem; }
  .hero-caption { font-size: 0.45rem; }

  .name-popup { min-width: 240px; padding: 0.8rem 1rem; }
  .popup-info strong { font-size: 0.85rem; }
  .popup-info span { font-size: 0.65rem; }

  /* Slide 2 */
  .slide-2 { gap: 1.2rem; padding: 3vh 4vw; }
  .slide2-title { font-size: clamp(1.6rem, 7vw, 2.4rem) !important; }
  .two-tiles { grid-template-columns: 1fr; gap: 0.8rem; }
  .tile { padding: 1.2rem 1rem; border-radius: 12px; }
  .tile-number { margin-bottom: 0.5rem; font-size: 0.65rem; }
  .tile h2 { font-size: 1.1rem !important; margin-bottom: 0.5rem; }
  .tile-teaser { font-size: 0.8rem; margin-bottom: 0.8rem; }

  /* Slide 3 */
  .slide-3 { gap: 1rem; padding: 3vh 4vw; }
  .slide-3 h1 { font-size: clamp(1.4rem, 6vw, 2rem) !important; }
  .three-pillars { gap: 0.5rem; flex-wrap: wrap; justify-content: center; }
  .pillar { font-size: 0.8rem; padding: 0.35rem 0.9rem; }
  .slide3-body { grid-template-columns: 1fr; gap: 1rem; }
  .idea-card { padding: 0.8rem 1rem; gap: 0.7rem; }
  .idea-icon { font-size: 1.1rem; width: 1.8rem; }
  .idea-card strong { font-size: 0.85rem; }
  .idea-card span { font-size: 0.7rem; }
  .future-section { padding: 1.2rem 1.2rem; }
  .section-label { font-size: 0.65rem; margin-bottom: 0.6rem; }
  .future-item { font-size: 0.85rem; }

  /* Modal */
  .modal-content {
    padding: 1.5rem 1.2rem;
    max-width: 95vw;
    max-height: 85vh;
    border-radius: 12px;
  }
  .modal-section h3 { font-size: 0.95rem; }
  .modal-para { font-size: 0.82rem; }
  .modal-intro { font-size: 0.85rem; }

  /* Nav arrows */
  .nav-arrow { font-size: 2rem; padding: 0.3rem; }
  .nav-left { left: 0.3rem; }
  .nav-right { right: 0.3rem; }
}

/* Small phones */
@media (max-width: 400px) {
  html, body { font-size: 14px; }
  .slide { padding: 2vh 3vw; }
  .logo-chip { width: 110px; height: 55px; }
  .three-pillars { gap: 0.3rem; }
  .pillar { font-size: 0.7rem; padding: 0.3rem 0.7rem; }
}