/* Veni Vidi Games — tokens, type, buttons, navigation.
   Colours are sampled from the emblem; see docs/BRAND.md. */

@font-face {
  font-family: "Cinzel";
  src: url("../assets/fonts/Cinzel-var.woff2") format("woff2");
  font-weight: 400 900;
  font-display: swap;
}

@font-face {
  font-family: "Archivo";
  src: url("../assets/fonts/Archivo-var.woff2") format("woff2");
  font-weight: 400 800;
  font-stretch: 70% 100%;
  font-display: swap;
}

:root {
  /* the helmet's colours */
  --ink: #0a2e32;
  --ink-deep: #061f22;
  --petrol: #0f3d42;
  --petrol-lift: #14494f;
  --gold: #e0ac45;
  --gold-light: #f7da86;
  --gold-deep: #a87b24;
  --cream: #f6e7b9;
  --cream-deep: #c9b67e;
  --crimson: #c33e24;
  --crimson-field: #b0361e; /* a shade deeper, so cream body text on it passes AA contrast */
  --crimson-deep: #8e2814;
  --teal: #009f9f;
  --teal-bright: #46d3cc;

  --font-display: "Cinzel", "Trajan Pro", "Times New Roman", serif;
  --font-text: "Archivo", "Helvetica Neue", Arial, sans-serif;

  /* type scale: body, lead, and three heading steps */
  --step-small: 0.875rem;
  --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --step-1: clamp(1.15rem, 1.04rem + 0.55vw, 1.5rem);
  --step-2: clamp(1.5rem, 1.2rem + 1.5vw, 2.5rem);
  --step-3: clamp(2.5rem, 1.5rem + 5vw, 5.5rem);

  --gutter: clamp(1.25rem, 4.6vw, 4.5rem);
  --nav-h: clamp(3.75rem, 3.2rem + 2vw, 5rem);

  --ease-out: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-spring: cubic-bezier(0.34, 1.45, 0.64, 1);
  --ease-inout: cubic-bezier(0.7, 0, 0.2, 1);

  --focus: var(--cream);
}

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

html {
  /* everything sized in rem grows a little on large screens */
  font-size: clamp(100%, 0.55rem + 0.45vw, 122%);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
  background: var(--ink-deep);
}

html.motion {
  /* scroll position is animated by hand inside the pinned stage */
  scroll-behavior: auto;
}

body {
  margin: 0;
  font: 400 var(--step-0) / 1.5 var(--font-text);
  color: var(--cream);
  background: var(--ink-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

h1,
h2,
h3,
p,
ul {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

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

img {
  height: auto;
}

a {
  color: inherit;
}

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* sections that receive focus after an in-page link do not need a ring around the whole screen */
[tabindex="-1"]:focus-visible {
  outline: none;
}

::selection {
  background: var(--gold);
  color: var(--ink-deep);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 200;
  padding: 0.7em 1em;
  border-radius: 0.6em;
  background: var(--cream);
  color: var(--ink-deep);
  font-weight: 700;
  text-decoration: none;
  transform: translateY(-200%);
}

.skip:focus-visible {
  transform: none;
}

.lead {
  max-width: 34em;
  font-size: var(--step-1);
  line-height: 1.4;
}

/* ---------- buttons: a keycap with a face and a side ---------- */

.btn {
  --btn-face: var(--gold);
  --btn-side: var(--gold-deep);
  --btn-text: var(--ink-deep);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.82em 1.35em;
  border: 0;
  border-radius: 0.7em;
  background: var(--btn-face);
  color: var(--btn-text);
  font: 700 1rem / 1 var(--font-text);
  font-stretch: 92%;
  letter-spacing: 0.01em;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  box-shadow: 0 0.3em 0 var(--btn-side);
  transition:
    transform 0.14s var(--ease-out),
    box-shadow 0.14s var(--ease-out),
    background-color 0.3s,
    color 0.3s;
}

.btn:hover {
  transform: translateY(-0.12em);
  box-shadow: 0 0.42em 0 var(--btn-side);
}

.btn:active {
  transform: translateY(0.3em);
  box-shadow: 0 0 0 var(--btn-side);
}

.btn--ghost {
  --btn-face: rgb(246 231 185 / 0.1);
  --btn-side: rgb(6 31 34 / 0.55);
  --btn-text: var(--cream);
  box-shadow:
    inset 0 0 0 2px rgb(246 231 185 / 0.65),
    0 0.3em 0 var(--btn-side);
}

.btn--ghost:hover {
  box-shadow:
    inset 0 0 0 2px var(--cream),
    0 0.42em 0 var(--btn-side);
}

.btn--ghost:active {
  box-shadow:
    inset 0 0 0 2px var(--cream),
    0 0 0 var(--btn-side);
}

.btn--cream {
  --btn-face: var(--cream);
  --btn-side: var(--crimson-deep);
  --btn-text: var(--crimson-deep);
}

.btn--small {
  padding: 0.68em 1.05em;
  font-size: 0.9rem;
}

.btn--big {
  padding: 0.9em 1.6em;
  font-size: clamp(1.15rem, 1rem + 0.7vw, 1.5rem);
}

/* ---------- navigation ---------- */

.nav {
  --nav-text: var(--cream);
  --nav-plate: transparent;
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.4vw, 2.5rem);
  height: var(--nav-h);
  padding: 0 var(--gutter);
  color: var(--nav-text);
  transition:
    color 0.35s,
    opacity 0.35s var(--ease-out),
    transform 0.45s var(--ease-out);
}

/* the header takes its colours from whatever section is behind it */
.nav[data-theme="gold"] {
  --nav-text: var(--ink-deep);
  --nav-plate: var(--gold);
  --focus: var(--ink-deep);
}

.nav[data-theme="crimson"] {
  --nav-plate: var(--crimson-field);
}

.nav[data-theme="ink"] {
  --nav-plate: var(--ink-deep);
}

/* past the pinned stage it gets a solid plate, and tucks away while scrolling down */
.nav::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: var(--nav-plate);
  opacity: 0;
  transition:
    opacity 0.3s,
    background-color 0.3s;
}

.nav.is-plated::before {
  opacity: 1;
}

.nav.is-away {
  transform: translateY(-105%);
}

.nav[data-theme="hide"],
.pre .nav {
  opacity: 0;
  pointer-events: none;
}

/* on the plain page the header simply sits at the top and scrolls away */
html:not(.motion) .nav {
  position: absolute;
}

.pre .nav {
  transform: translateY(-0.6rem);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-right: auto;
  text-decoration: none;
}

.nav__brand img {
  width: clamp(2.4rem, 2rem + 1.2vw, 3.1rem);
}

.nav__name {
  display: grid;
  font: 600 clamp(1rem, 0.9rem + 0.4vw, 1.2rem) / 1 var(--font-display);
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.nav__name small {
  margin-top: 0.38em;
  font: 400 0.56em / 1 var(--font-display);
  letter-spacing: 0.2em;
  opacity: 0.85;
}

.nav__links {
  display: flex;
  gap: clamp(1.1rem, 2.2vw, 2.25rem);
}

.nav__links a {
  position: relative;
  padding: 0.5em 0;
  font-weight: 600;
  font-stretch: 94%;
  text-decoration: none;
}

.nav__links a::after {
  content: "";
  position: absolute;
  inset: auto 0 0.2em 0;
  height: 2px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: 0 50%;
  transition: transform 0.3s var(--ease-out);
}

.nav__links a:hover::after,
.nav__links a:focus-visible::after {
  transform: scaleX(1);
}

.nav[data-theme="gold"] .nav__cta {
  --btn-face: var(--ink);
  --btn-side: var(--ink-deep);
  --btn-text: var(--cream);
}

.nav[data-theme="crimson"] .nav__cta {
  --btn-face: var(--cream);
  --btn-side: var(--crimson-deep);
}

.nav__toggle {
  display: none;
  align-items: center;
  gap: 0.6rem;
  padding: 0.55rem 0;
  border: 0;
  background: none;
  font-weight: 700;
  font-stretch: 92%;
  cursor: pointer;
}

.nav__toggle-bars {
  position: relative;
  width: 1.5rem;
  height: 0.75rem;
}

.nav__toggle-bars::before,
.nav__toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2.5px;
  border-radius: 2px;
  background: currentColor;
  transition: transform 0.35s var(--ease-out);
}

.nav__toggle-bars::before {
  top: 0;
}

.nav__toggle-bars::after {
  bottom: 0;
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bars::before {
  transform: translateY(0.3rem) rotate(45deg);
}

.nav__toggle[aria-expanded="true"] .nav__toggle-bars::after {
  transform: translateY(-0.3rem) rotate(-45deg);
}

/* ---------- small-screen menu: an ink blade sweeps up from the corner ---------- */

.menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  overflow: hidden;
}

.menu[hidden] {
  display: none;
}

.menu__blade {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 150vmax;
  height: 150vmax;
  background: var(--ink-deep);
  transform: rotate(90deg);
  transform-origin: 0 100%;
  transition: transform 0.55s var(--ease-inout);
}

.menu.is-open .menu__blade {
  transform: none;
}

.menu__links {
  position: relative;
  display: grid;
  align-content: center;
  justify-items: start;
  gap: 1.1rem;
  height: 100%;
  padding: var(--nav-h) var(--gutter) 2rem;
}

.menu__links a:not(.btn) {
  font: 600 clamp(2rem, 9vw, 3.25rem) / 1.1 var(--font-display);
  letter-spacing: 0.02em;
  text-decoration: none;
}

.menu__links a {
  opacity: 0;
  transform: translateY(1rem);
  transition:
    opacity 0.3s,
    transform 0.4s var(--ease-out);
}

.menu__links .btn {
  margin-top: 1rem;
}

.menu.is-open .menu__links a {
  opacity: 1;
  transform: none;
  transition-delay: calc(0.22s + var(--n, 0) * 0.06s);
}

.menu__links a:nth-child(2) {
  --n: 1;
}

.menu__links a:nth-child(3) {
  --n: 2;
}

.menu__links a:nth-child(4) {
  --n: 3;
}

/* ---------- curtain: covers the page while a long in-page jump happens ---------- */

.curtain {
  position: fixed;
  inset: 0;
  z-index: 110;
  overflow: hidden;
  pointer-events: none;
  visibility: hidden;
}

.curtain.is-live {
  pointer-events: auto;
  visibility: visible;
}

.curtain i {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 150vmax;
  height: 150vmax;
  background: var(--ink-deep);
  transform: rotate(90deg);
  transform-origin: 0 100%;
}

@media (max-width: 52rem) {
  .nav__links,
  .nav__cta {
    display: none;
  }

  .nav__toggle {
    display: inline-flex;
  }

  /* without script the menu button cannot open anything, so show the links instead */
  .no-js .nav__links {
    display: flex;
  }

  .no-js .nav__toggle,
  .no-js .nav__name {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .menu__blade,
  .menu__links a,
  .nav {
    transition: none;
  }
}