/* ============================================================
   The Knight Within — styles
   Black & white, minimalist, modern. One landing page.
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --bg-dark: #000000;
  --fg-dark: #ffffff;

  --muted: #6b6b6b;        /* secondary text on light */
  --muted-dark: #9a9a9a;   /* secondary text on dark  */
  --line: #e6e6e6;         /* hairlines on light      */
  --line-dark: rgba(255, 255, 255, 0.14);

  --container: 1200px;
  --gutter: clamp(1.25rem, 4vw, 2.5rem);
  --radius: 0px;

  --font-sans: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-display: "Space Grotesk", var(--font-sans);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 0.2s var(--ease);
  --t-med: 0.45s var(--ease);

  --nav-h: 4.5rem;
}

/* ---------- Reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

* { margin: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  background: var(--bg-dark);
  overscroll-behavior-y: none;
}

body {
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

input { font: inherit; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

::selection { background: var(--fg); color: var(--bg); }

/* ---------- Helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.visually-hidden,
.skip-link:not(:focus) {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  z-index: 200;
  top: 0.75rem; left: 0.75rem;
  background: var(--fg-dark);
  color: var(--bg-dark);
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-size: 0.875rem;
}

:where(a, button, input):focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
  border-radius: 2px;
}

.kicker {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.section--dark .kicker { color: var(--muted-dark); }

/* ---------- Section theming ---------- */
.section--dark { background: var(--bg-dark); color: var(--fg-dark); }
.section--light { background: var(--bg); color: var(--fg); }

.section {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding-block: clamp(3.5rem, 6vw, 5.5rem);
  scroll-margin-top: var(--nav-h);
}
/* Center content when it's short, but top-align it when it's taller than the
   screen so nothing slides under the fixed nav. */
.section > .container { margin-block: auto; }

[id] { scroll-margin-top: var(--nav-h); }

.section__head { max-width: 56rem; }

.section__title {
  font-size: clamp(2rem, 1.2rem + 3.4vw, 3.75rem);
  margin-top: 1.1rem;
  margin-left: -0.08em; /* optical: align cap ink flush with the kicker / body */
}

.section__lede {
  margin-top: 1.5rem;
  max-width: 42rem;
  color: var(--muted);
  font-size: clamp(1.0625rem, 1rem + 0.3vw, 1.25rem);
}

.section--dark .section__lede { color: var(--muted-dark); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.6rem;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: 0.01em;
  white-space: nowrap;
  border: 1px solid transparent;
  transition: background var(--t-fast), color var(--t-fast),
    border-color var(--t-fast), transform var(--t-fast);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }
.btn--sm { padding: 0.6rem 1.1rem; font-size: 0.875rem; }

/* solid = black on light backgrounds */
.btn--solid { background: var(--fg); color: var(--bg); }
.btn--solid:hover { background: #2a2a2a; }

/* solid-inverse = white, for dark backgrounds */
.btn--solid-inverse { background: var(--fg-dark); color: var(--bg-dark); }
.btn--solid-inverse:hover { background: #dcdcdc; }

/* ghost = outlined; fills with a contrasting solid on hover */
.btn--ghost {
  border-color: currentColor;
  color: inherit;
  background: transparent;
}
/* On dark backgrounds (nav + dark sections): white fill, black text */
.nav__links .btn--ghost:hover,
.section--dark .btn--ghost:hover {
  background: var(--fg-dark);
  color: var(--bg-dark);
  border-color: var(--fg-dark);
}
/* On light backgrounds: black fill, white text */
.section--light .btn--ghost:hover {
  background: var(--fg);
  color: var(--bg);
  border-color: var(--fg);
}

/* ---------- Wordmark ---------- */
.brand {
  display: inline-flex;
  align-items: center;
}
.brand__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.0625rem;
  letter-spacing: 0.01em;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  color: var(--fg-dark);
  transition: background var(--t-med), border-color var(--t-med), backdrop-filter var(--t-med);
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line-dark);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.nav__right {
  display: flex;
  align-items: center;
  gap: clamp(0.85rem, 2.5vw, 1.75rem);
}
.lang {
  display: inline-flex;
  align-items: center;
  flex: none;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
}
.lang__btn {
  padding: 0.34rem 0.62rem;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--fg-dark);
  opacity: 0.6;
  transition: background var(--t-fast), color var(--t-fast), opacity var(--t-fast);
}
.lang__btn:hover { opacity: 1; }
.lang__btn[aria-pressed="true"] {
  background: var(--fg-dark);
  color: var(--bg-dark);
  opacity: 1;
}
.nav__links {
  display: flex;
  align-items: center;
  gap: clamp(1.25rem, 3vw, 2.25rem);
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 0.9375rem;
}
.nav__links > a:not(.btn) {
  position: relative;
  opacity: 0.85;
  transition: opacity var(--t-fast);
}
.nav__links > a:not(.btn)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--t-fast);
}
.nav__links > a:not(.btn):hover { opacity: 1; }
.nav__links > a:not(.btn):hover::after { transform: scaleX(1); }

.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  margin-right: -0.5rem;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}
.nav__toggle span {
  width: 22px; height: 2px;
  background: currentColor;
  transition: transform var(--t-fast), opacity var(--t-fast);
}
.nav.is-open .nav__toggle span:first-child { transform: translateY(4px) rotate(45deg); }
.nav.is-open .nav__toggle span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: calc(var(--nav-h) + 2rem) 6rem;
  overflow: hidden;
  background:
    radial-gradient(120% 120% at 50% 0%, #161616 0%, #000 60%);
}
.hero__inner { position: relative; }
.hero__title {
  font-size: clamp(2.85rem, 1.2rem + 8vw, 7.5rem);
  letter-spacing: -0.035em;
  margin-top: 1.4rem;
  max-width: 16ch;
  margin-left: -0.09em; /* optical: align large cap ink with the kicker above */
}
.hero__lede {
  margin-top: 1.75rem;
  max-width: 40rem;
  color: var(--muted-dark);
  font-size: clamp(1.0625rem, 1rem + 0.4vw, 1.3rem);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.5rem;
}

/* ---------- Studio founders ---------- */
.founders {
  list-style: none;
  padding: 0;
  margin-top: clamp(3rem, 6vw, 5rem);
  padding-top: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--line);
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(2rem, 5vw, 3.5rem);
}
.founder {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}
.founder__photo {
  flex: none;
  width: clamp(104px, 16vw, 132px);
  height: clamp(104px, 16vw, 132px);
  object-fit: cover;
  border-radius: 8px;
  background: var(--line);
}
.founder__name { font-size: 1.35rem; }
.founder__role {
  margin-top: 0.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ---------- In development ---------- */
.game__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2.5rem, 6vw, 5rem);
  align-items: start;
}
.game__intro .btn { margin-top: 2.25rem; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--fg-dark);
  border: 1px solid var(--line-dark);
  padding: 0.45rem 0.9rem;
  border-radius: var(--radius);
}
.badge__dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #fff;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.8); }
}

.game__card {
  border: 1px solid var(--line-dark);
  border-radius: 12px;
  padding: clamp(1.75rem, 4vw, 2.5rem);
  background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent);
}
.game__card-label {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.redacted {
  margin-top: 0.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
}
.redacted span {
  display: block;
  width: min(100%, 17rem);
  height: 2.25rem;
  background: repeating-linear-gradient(
    45deg, #fff, #fff 8px, #d4d4d4 8px, #d4d4d4 16px
  );
  border-radius: 3px;
}
.game__card-note {
  margin-top: 0.6rem;
  color: var(--muted-dark);
  font-size: 0.95rem;
}
.specs {
  margin-top: 1.75rem;
  border-top: 1px solid var(--line-dark);
}
.specs > div {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 0;
  border-bottom: 1px solid var(--line-dark);
}
.specs dt {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-dark);
}
.specs dd { font-weight: 500; }

/* ---------- Stay updated ---------- */
.updates__inner { max-width: 46rem; }
.signup {
  margin-top: 2.25rem;
  display: flex;
  gap: 0.6rem;
  max-width: 30rem;
}
.signup input {
  flex: 1;
  min-width: 0;
  padding: 0.9rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--fg);
  transition: border-color var(--t-fast);
}
.signup input::placeholder { color: #b0b0b0; }
.signup input:focus-visible {
  outline: none;
  border-color: var(--fg);
}
.signup__message {
  margin-top: 0.9rem;
  min-height: 1.4rem;
  font-size: 0.95rem;
  color: var(--muted);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity var(--t-fast), transform var(--t-fast);
}
.signup__message.is-visible { opacity: 1; transform: none; }

.updates__social {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.updates__social > span {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.updates__social ul {
  list-style: none;
  display: flex;
  gap: 0.6rem;
  padding: 0;
}
.updates__social a {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--fg);
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast);
}
.updates__social a:hover {
  background: var(--fg);
  color: var(--bg);
  transform: translateY(-2px);
}

/* ---------- Footer ---------- */
.footer { padding-block: clamp(3rem, 6vw, 4.5rem) 2rem; }
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--line-dark);
}
.footer__brand p {
  margin-top: 0.9rem;
  color: var(--muted-dark);
  font-size: 0.95rem;
  max-width: 22rem;
}
.footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-family: var(--font-display);
  font-size: 0.9375rem;
  height: fit-content;
}
.footer__nav a { color: var(--muted-dark); transition: color var(--t-fast); }
.footer__nav a:hover { color: var(--fg-dark); }
.footer__base {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 1.75rem;
  font-size: 0.8125rem;
  color: var(--muted-dark);
}

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .founders { grid-template-columns: 1fr; }
  .game__inner { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .nav__toggle { display: flex; }
  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(0, 0, 0, 0.96);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line-dark);
    padding: 0.5rem var(--gutter) 1.5rem;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--t-fast), transform var(--t-fast), visibility var(--t-fast);
  }
  .nav.is-open .nav__links {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .nav__links > a:not(.btn) {
    padding: 1rem 0;
    border-bottom: 1px solid var(--line-dark);
    font-size: 1.1rem;
  }
  .nav__links > a:not(.btn)::after { display: none; }
  .nav__links .btn { margin-top: 1.25rem; justify-content: center; }

  .signup { flex-direction: column; }
  .signup .btn { justify-content: center; }
  .updates__social { flex-direction: column; align-items: flex-start; gap: 1rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .badge__dot { animation: none; }
  .btn:hover { transform: none; }
}