/* ============ Preset C — "Brutalist Signal" design tokens ============ */
:root {
  --paper: #E8E4DD;
  --accent: #E63B2E;
  --bg: #F5F3EE;
  --ink: #111111;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-drama: 'DM Serif Display', serif;
  --font-mono: 'Space Mono', monospace;
  --ease-magnetic: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --r-card: 2rem;
  --r-section: 3rem;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-heading);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: transform 0.25s var(--ease-magnetic); }
a:hover { transform: translateY(-1px); }

.mono { font-family: var(--font-mono); }
.accent { color: var(--accent); }

/* ============ Global noise overlay ============ */
.noise {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.05;
  pointer-events: none;
  z-index: 999;
}

/* ============ Buttons — magnetic, sliding layer ============ */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  border: none;
  border-radius: 999px;
  font-family: var(--font-heading);
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.3s var(--ease-magnetic);
  will-change: transform;
}
.btn:hover { transform: scale(1.03); }

.btn-accent { background: var(--accent); color: var(--bg); }
.btn-sm { padding: 0.6rem 1.25rem; font-size: 0.85rem; }
.btn-lg { padding: 1.1rem 2.25rem; font-size: 1.05rem; }

.btn-slide {
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform: translateY(101%);
  transition: transform 0.35s var(--ease-magnetic);
  border-radius: inherit;
}
.btn:hover .btn-slide { transform: translateY(0); }
.btn-label { position: relative; z-index: 1; }

/* ============ A. Navbar — Floating Island ============ */
.island {
  position: fixed;
  top: 1.25rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 100;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 0.6rem 0.6rem 0.6rem 1.5rem;
  border-radius: 999px;
  border: 1px solid transparent;
  color: var(--bg);
  transition: background 0.4s var(--ease-magnetic), color 0.4s var(--ease-magnetic),
              border-color 0.4s var(--ease-magnetic), backdrop-filter 0.4s;
  white-space: nowrap;
}

.island.scrolled {
  background: rgba(245, 243, 238, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  color: var(--ink);
  border-color: rgba(17, 17, 17, 0.12);
}

.island-logo { font-weight: 700; font-size: 1.05rem; letter-spacing: -0.02em; }
.island-links { display: flex; gap: 1.4rem; font-size: 0.9rem; font-weight: 500; }

/* ============ B. Hero — The Opening Shot ============ */
.hero {
  position: relative;
  height: 100dvh;
  min-height: 620px;
  overflow: hidden;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
    rgba(17, 17, 17, 0.94) 0%,
    rgba(17, 17, 17, 0.45) 50%,
    rgba(17, 17, 17, 0.72) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  padding: clamp(1.5rem, 5vw, 5rem);
  padding-bottom: clamp(3rem, 8vh, 6rem);
  color: var(--bg);
  max-width: 1000px;
}

.hero-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.85;
  margin-bottom: 1.25rem;
}

.hero h1 { display: flex; flex-direction: column; margin-bottom: 1.5rem; }

.hero-sans {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(1.4rem, 3.2vw, 2.6rem);
  letter-spacing: -0.03em;
  text-transform: uppercase;
  line-height: 1.1;
}

.hero-serif {
  font-family: var(--font-drama);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(4.2rem, 13vw, 10.5rem);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--paper);
  margin-left: -0.04em;
}

.hero-sub {
  font-size: clamp(0.95rem, 1.4vw, 1.15rem);
  max-width: 46ch;
  opacity: 0.9;
  margin-bottom: 2.25rem;
}

/* ============ Section scaffolding ============ */
.section-label {
  font-size: 0.78rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}
.section-label.light { color: var(--paper); opacity: 0.7; }

.section-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.2rem, 5vw, 4rem);
  letter-spacing: -0.03em;
  line-height: 1.02;
  text-transform: uppercase;
}
.section-title em {
  font-family: var(--font-drama);
  font-style: italic;
  font-weight: 400;
  text-transform: none;
  font-size: 1.18em;
}

/* ============ C. Features — Interactive Artifacts ============ */
.signal { padding: clamp(4rem, 9vw, 8rem) clamp(1.25rem, 5vw, 5rem); }

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2vw, 2rem);
  margin-top: clamp(2.5rem, 5vw, 4.5rem);
}

.card {
  background: var(--paper);
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: var(--r-card);
  padding: 1.4rem;
  box-shadow: 0 24px 48px -24px rgba(17, 17, 17, 0.25);
}

.card h3 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-transform: uppercase;
  margin: 1.4rem 0 0.4rem;
}

.card-desc { font-size: 0.92rem; opacity: 0.8; }

.card-visual {
  position: relative;
  background: var(--bg);
  border: 1px solid rgba(17, 17, 17, 0.08);
  border-radius: calc(var(--r-card) - 0.6rem);
  height: 250px;
  overflow: hidden;
}

/* Card 1 — Diagnostic Shuffler */
.shuffler { padding: 1.25rem; }

.shuffle-card {
  position: absolute;
  left: 1.25rem;
  right: 1.25rem;
  top: 1.5rem;
  background: #fff;
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: 1.1rem;
  padding: 1rem 1.2rem;
  box-shadow: 0 12px 24px -12px rgba(17, 17, 17, 0.2);
  transition: transform 0.8s var(--ease-spring), opacity 0.6s var(--ease-magnetic);
}
.shuffle-card p { font-size: 0.95rem; font-weight: 500; margin-top: 0.35rem; }

.tag {
  display: inline-block;
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--bg);
  background: var(--accent);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
}

.shuffle-card.pos-0 { transform: translateY(0) scale(1); z-index: 3; opacity: 1; }
.shuffle-card.pos-1 { transform: translateY(52px) scale(0.94); z-index: 2; opacity: 0.55; }
.shuffle-card.pos-2 { transform: translateY(100px) scale(0.88); z-index: 1; opacity: 0.3; }

/* Card 2 — Telemetry Typewriter */
.feed {
  padding: 1.1rem 1.25rem;
  display: flex;
  flex-direction: column;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.78rem;
}

.feed-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.75;
  margin-bottom: 0.9rem;
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1.6s ease-in-out infinite;
}
.pulse-dot.green { background: #3DBB61; }

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.75); }
}

.feed-lines { display: flex; flex-direction: column; gap: 0.45rem; opacity: 0.55; }
.feed-lines div { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.feed-current { margin-top: 0.45rem; color: var(--paper); }

.cursor {
  display: inline-block;
  width: 8px;
  height: 1em;
  margin-left: 2px;
  vertical-align: text-bottom;
  background: var(--accent);
  animation: blink 0.9s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* Card 3 — Cursor Protocol Scheduler */
.scheduler { padding: 1.25rem; }

.sched-head {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.6;
  margin-bottom: 1rem;
}

.sched-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.4rem;
  margin-bottom: 1.1rem;
}

.sched-day {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  border: 1px solid rgba(17, 17, 17, 0.15);
  border-radius: 0.6rem;
  transition: all 0.25s var(--ease-magnetic);
}

.sched-day.pressed { transform: scale(0.95); }
.sched-day.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.sched-save {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.55rem 1.4rem;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: transparent;
  color: var(--ink);
  transition: all 0.25s var(--ease-magnetic);
  pointer-events: none;
}
.sched-save.pressed { transform: scale(0.95); background: var(--ink); color: var(--bg); }

.sched-cursor {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 5;
  opacity: 0;
  filter: drop-shadow(0 4px 6px rgba(17, 17, 17, 0.3));
}

/* ============ D. Philosophy — The Manifesto ============ */
.philosophy {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-section);
  margin: 0 clamp(0.75rem, 2vw, 2rem);
  overflow: hidden;
}

.philosophy-texture {
  position: absolute;
  top: -12%;
  left: 0;
  width: 100%;
  height: 124%;
  object-fit: cover;
  opacity: 0.14;
  will-change: transform;
}

.philosophy-inner {
  position: relative;
  z-index: 1;
  padding: clamp(5rem, 12vw, 10rem) clamp(1.5rem, 6vw, 6rem);
  max-width: 1100px;
}

.manifesto-minor {
  font-size: clamp(1.05rem, 2.2vw, 1.5rem);
  opacity: 0.6;
  max-width: 40ch;
  margin-bottom: 2.5rem;
}

.manifesto-major {
  font-family: var(--font-drama);
  font-style: italic;
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
}

[data-words] .word { display: inline-block; }

/* ============ E. Protocol — Sticky Stacking Archive ============ */
.protocol { padding: clamp(4rem, 9vw, 8rem) 0 0; }

.protocol-intro { padding: 0 clamp(1.25rem, 5vw, 5rem) clamp(2rem, 5vw, 4rem); }

.stack-slot { position: sticky; top: 0; height: 100vh; height: 100dvh; }

.stack-card {
  height: 100%;
  margin: 0 clamp(0.75rem, 2vw, 2rem);
  background: var(--paper);
  border: 1px solid rgba(17, 17, 17, 0.12);
  border-radius: var(--r-section);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  align-items: center;
  gap: 2rem;
  padding: clamp(2rem, 6vw, 6rem);
  box-shadow: 0 -20px 60px -30px rgba(17, 17, 17, 0.35);
  will-change: transform, filter, opacity;
}

.step-num { font-size: 0.85rem; letter-spacing: 0.15em; color: var(--accent); }

.stack-text h3 {
  font-family: var(--font-drama);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(3rem, 8vw, 6.5rem);
  line-height: 1;
  margin: 0.75rem 0 1.25rem;
}

.stack-text p { font-size: clamp(0.95rem, 1.4vw, 1.1rem); opacity: 0.8; max-width: 46ch; }

.stack-visual { display: flex; align-items: center; justify-content: center; }
.stack-visual svg { width: min(100%, 320px); height: auto; overflow: visible; }

.viz-rings .rings-a, .viz-rings .rings-b { transform-origin: 100px 100px; }

.ekg-path { stroke-dasharray: 60 480; }

/* ============ F. Get Started ============ */
.start { padding: clamp(4rem, 10vw, 9rem) clamp(1.25rem, 5vw, 5rem); }

.start-inner {
  background: var(--paper);
  border: 1px solid rgba(17, 17, 17, 0.1);
  border-radius: var(--r-section);
  padding: clamp(3rem, 8vw, 7rem) clamp(1.5rem, 6vw, 6rem);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.start-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: clamp(2.6rem, 7vw, 5.5rem);
  letter-spacing: -0.03em;
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 2.5rem;
}
.start-title em {
  font-family: var(--font-drama);
  font-style: italic;
  font-weight: 400;
  text-transform: none;
  font-size: 1.15em;
}

.start-micro {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  opacity: 0.55;
  margin-top: 1.25rem;
}

/* ============ G. Footer ============ */
.footer {
  background: var(--ink);
  color: var(--paper);
  border-radius: 4rem 4rem 0 0;
  padding: clamp(3rem, 7vw, 6rem) clamp(1.5rem, 5vw, 5rem) 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(232, 228, 221, 0.15);
}

.footer-logo { font-weight: 700; font-size: 1.4rem; letter-spacing: -0.02em; }
.footer-tag { opacity: 0.6; margin-top: 0.6rem; max-width: 32ch; font-size: 0.95rem; }

.footer-col { display: flex; flex-direction: column; gap: 0.7rem; font-size: 0.95rem; }
.footer-col a { opacity: 0.75; }
.footer-col a:hover { opacity: 1; }

.footer-col-head {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  opacity: 0.45;
  margin-bottom: 0.4rem;
}

.footer-base {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
  flex-wrap: wrap;
  gap: 1rem;
}

.status { display: inline-flex; align-items: center; gap: 0.5rem; }

/* ============ Responsive ============ */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .stack-card { grid-template-columns: 1fr; gap: 1.5rem; align-content: center; }
  .stack-visual svg { width: min(60%, 220px); }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 720px) {
  .island { gap: 1rem; padding-left: 1.1rem; }
  .island-links { display: none; }
  .hero-serif { font-size: clamp(3.4rem, 18vw, 5rem); }
  .stack-card { padding: 1.75rem; }
  .stack-text h3 { font-size: 2.8rem; }
}