@import url("https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@500;600;700&family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@500;600&display=swap");

:root {
  --color-bg: #faf7f5;
  --color-surface: #ffffff;
  --color-ink: #17110f;
  --color-ink-soft: #2a201d;

  --color-primary: #7f0206;
  --color-primary-dark: #560103;
  --color-primary-tint: #f7e7e6;

  --color-accent: #b8862e;
  --color-accent-tint: #f7ecd9;

  --color-text: #201716;
  --color-text-muted: #6e5f5c;
  --color-on-ink: #f5efec;
  --color-on-ink-muted: #b8a9a4;

  --color-border: #e9dedb;
  --color-border-on-ink: rgba(245, 239, 236, 0.14);

  --font-display: "Space Grotesk", "Inter", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, monospace;

  --container: 1180px;
  --edge: clamp(1.25rem, 5vw, 4rem);

  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--color-ink);
}

p {
  margin: 0;
}

::selection {
  background: var(--color-primary);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ---------- Layout helpers ---------- */

.wrap {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--edge);
  padding-right: var(--edge);
}

section {
  position: relative;
}

.section-pad {
  padding: clamp(4rem, 9vw, 7.5rem) 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--color-primary);
  margin-bottom: 1.4rem;
}

.on-ink .section-label {
  color: var(--color-accent);
}

.section-label .idx {
  color: inherit;
}

.section-label::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  display: inline-block;
}

.ghost-number {
  position: absolute;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(9rem, 26vw, 20rem);
  line-height: 1;
  color: var(--color-ink);
  opacity: 0.035;
  top: -2.5rem;
  right: -1rem;
  pointer-events: none;
  z-index: 0;
  user-select: none;
}

.on-ink .ghost-number {
  color: var(--color-on-ink);
  opacity: 0.05;
}

/* Corner-bracket / reticle mark — a recurring precision motif */

.mark {
  position: relative;
  display: inline-block;
  width: 1em;
  height: 1em;
}

.crosshair {
  position: relative;
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.crosshair::before,
.crosshair::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.crosshair::before {
  width: 100%;
  height: 1.5px;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.crosshair::after {
  height: 100%;
  width: 1.5px;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
}

.bracket-frame {
  position: absolute;
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.bracket-frame::before,
.bracket-frame::after {
  content: "";
  position: absolute;
  border-color: currentColor;
  border-style: solid;
  width: 100%;
  height: 100%;
}

.bracket-frame.tl { top: 0; left: 0; }
.bracket-frame.tl::before { border-width: 2px 0 0 2px; }
.bracket-frame.br { bottom: 0; right: 0; }
.bracket-frame.br::before { border-width: 0 2px 2px 0; }

/* ---------- Buttons ---------- */

.btn {
  --btn-x: 0px;
  --btn-y: 0px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  border: none;
  border-radius: 999px;
  padding: 0.95rem 1.85rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transform: translate(var(--btn-x), var(--btn-y));
  transition: transform 0.15s ease, background-color 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 10px 24px -8px rgba(127, 2, 6, 0.45);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-ink);
}

.on-ink .btn-outline {
  color: var(--color-on-ink);
  border-color: var(--color-border-on-ink);
}

.on-ink .btn-outline:hover {
  border-color: var(--color-on-ink);
}

.btn svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ---------- Reveal on scroll ---------- */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* ---------- Utility ---------- */

.text-muted { color: var(--color-text-muted); }
.on-ink .text-muted { color: var(--color-on-ink-muted); }
.mono { font-family: var(--font-mono); }
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}