/* ==========================================================
   EDIT THESE FIRST
   ========================================================== */
:root {
  --text: #ffffff;                 /* link color */
  --accent: #00ffb9;               /* green used for hover/glow (matches your logo) */
  --bg-fallback: #14181c;          /* shown if the video hasn't loaded */
  --overlay: rgba(0, 0, 0, 0.68);  /* darkens the video (0 = none, 1 = black) */
  --font: "Nunito Sans", "Avenir Next", Avenir, system-ui, -apple-system, "Segoe UI", sans-serif;   /* Avenir-style font for the tagline and links */
  --font-script: var(--font);   /* tagline uses the same font as the links; set to a different font name to change it */

  /* Logo size: scales with screen width, but never taller than the screen allows */
  --logo-width: min(clamp(240px, 42vw, 560px), 60vh);

  --tagline-color: #7b8189;        /* resting grey (darker = less visible) */
  --tagline-size: calc(var(--logo-width) * 0.0375);  /* starting size; the script in index.html fine-tunes it to fit under the logo */
  --glow-radius: 110px;            /* how big the green spotlight is under the cursor */

  --link-size: clamp(1rem, 1.5vw, 1.25rem);
  --lift: 4vh;                     /* how far above true center everything sits */
}

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

html, body { height: 100%; }

body {
  font-family: var(--font);
  color: var(--text);
  background: var(--bg-fallback);
  -webkit-font-smoothing: antialiased;
  overflow: hidden;   /* homepage fits on one screen, no scrolling */
}

/* ---------- Background video ---------- */
/* The still image (poster) sits behind the video. The video itself stays invisible until it is really playing,
   so a phone that blocks autoplay (or draws its own play button) shows just the still image, never player controls. */
.bg-poster {
  position: fixed;
  inset: 0;
  z-index: -3;
  background: var(--bg-fallback) url("assets/poster.jpg") center / cover no-repeat;
}
.bg-video {                                       /* the real video: kept tiny and invisible, only its picture is used (see background-video.js) */
  position: fixed;
  left: 0;
  top: 0;
  width: 2px;
  height: 2px;
  opacity: 0.01;
  z-index: -5;
  pointer-events: none;
}
.bg-canvas {                                      /* what you actually see: the video's picture painted on a canvas */
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.bg-canvas.is-playing { opacity: 1; }

/* belt and braces: switch off every built-in player control, in every browser */
.bg-video::-webkit-media-controls,
.bg-video::-webkit-media-controls-panel,
.bg-video::-webkit-media-controls-play-button,
.bg-video::-webkit-media-controls-start-playback-button,
.bg-video::-webkit-media-controls-overlay-play-button,
.bg-video::-webkit-media-controls-enclosure {
  display: none !important;
  -webkit-appearance: none;
  opacity: 0 !important;
}

.bg-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay);
  z-index: -1;
}

/* ---------- Layout: one centered stack, nudged upward ---------- */
.hero {
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 1rem 1.5rem calc(1rem + var(--lift) * 2);  /* extra bottom padding lifts the stack */
  opacity: 0;                                          /* the whole group fades in once the font has loaded and the tagline is sized, so nothing visibly resizes or moves */
  transition: opacity 0.6s ease;
}
.hero.is-ready { opacity: 1; }

.logo {
  display: block;
  width: var(--logo-width);
  height: auto;
  aspect-ratio: 2159 / 959;                   /* reserves the logo's space before the image loads, so nothing jumps when it appears */
}

/* ---------- Tagline (cursive, glows green under the cursor) ---------- */
.tagline {
  position: relative;
  margin-top: clamp(0.25rem, 1.5vh, 1rem);   /* space between logo and tagline */
  padding: 0 0.8em;
  /* The box has a fixed height (worked out from the logo size, not from the text), so a late font or a late logo image
     can't push the links around. The script sets the final height while the whole group is still invisible. */
  height: calc(var(--tagline-size) * 1.8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-script);
  font-size: var(--tagline-size);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.2;
  text-align: center;
  white-space: nowrap;
  cursor: default;
  --x: 50%;
  --y: 50%;
}

.tagline-base {
  display: block;
  color: var(--tagline-color);
}
.tagline-glow > span { display: block; }   /* colour is inherited from .tagline-glow (green) */

/* The green copy sits exactly on top of the grey one, but is only
   revealed in a soft circle around the cursor. */
.tagline-glow {
  position: absolute;
  inset: 0;
  display: flex;               /* same centering as the grey text; the inner wrapper keeps spaces/dividers laid out identically */
  align-items: center;
  justify-content: center;
  color: var(--accent);
  text-shadow: 0 0 0.2em var(--accent), 0 0 0.7em rgba(0, 255, 185, 0.65);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(circle var(--glow-radius) at var(--x) var(--y),
                      #000 0%, rgba(0, 0, 0, 0.55) 45%, transparent 100%);
          mask-image: radial-gradient(circle var(--glow-radius) at var(--x) var(--y),
                      #000 0%, rgba(0, 0, 0, 0.55) 45%, transparent 100%);
}

.tagline.is-lit .tagline-glow {
  opacity: 1;
}

/* The | dividers use the regular font (they look odd in script) */
.bar {
  font-family: var(--font);
  font-style: normal;
  font-weight: 400;
  font-size: 0.7em;
  margin: 0 0.35em;
  opacity: 0.8;
}

/* ---------- Links: subtle grey box that opens into glowing logo-style corner frames on hover ---------- */
nav {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: clamp(0.8rem, 2.4vh, 1.15rem);           /* space between links */
  margin-top: clamp(1.25rem, 4.5vh, 2.75rem);   /* space between tagline and links */
}

nav a {
  --frame-thickness: 2.5px;                      /* thickness of the corner frames (matches the chunky logo bars) */
  --frame-long: 41%;                             /* length of the long arm of each corner */
  --frame-short: 64%;                            /* length of the short arm of each corner */
  --frame-out-x: 0.9em;                          /* how far the corners grow outward past the resting box (sideways) */
  --frame-out-y: 0.35em;                         /* ...and up/down */
  position: relative;
  display: block;
  width: clamp(7.25rem, 10vw, 8.75rem);          /* all three boxes are the same width */
  padding: calc(0.4em - 1px) 0;                  /* box height (the 1px border is subtracted so the size stays exact) */
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.16);   /* the subtle grey box at rest (sharp corners) */
  background: rgba(255, 255, 255, 0.035);
  color: var(--text);
  text-decoration: none;
  font-size: var(--link-size);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.3;                              /* fixed, so the box height doesn't change when the font finishes loading */
  opacity: 0.9;
  /* mouse-out: the grey box fades back in slowly, starting while the corners are still sliding back */
  transition: color 0.5s ease, opacity 0.5s ease, text-shadow 0.5s ease,
              border-color 0.9s ease 0.2s, background-color 0.9s ease 0.2s;
}

/* The two corner frames, like the corners of your logo:
   ::before = top-left corner, ::after = bottom-right corner.
   At rest they are hidden, sitting exactly on the corners of the grey box; on hover they
   appear there and slide outward to frame the text while the grey box fades away. */
nav a::before,
nav a::after {
  content: "";
  position: absolute;
  width: var(--frame-long);                      /* full-size corner, hidden until hover */
  height: var(--frame-short);
  opacity: 0;
  pointer-events: none;
  /* drop-shadow follows the shape of the corner, so only the frame glows */
  filter: drop-shadow(0 0 3px var(--accent)) drop-shadow(0 0 9px rgba(0, 255, 185, 0.6));
  /* mouse-out: slide back onto the box corner, fading out gently while the grey box returns */
  transition: transform 0.6s cubic-bezier(0.22, 0.8, 0.2, 1),
              opacity 0.45s ease 0.25s;
}

nav a::before {
  top: -1px;                                     /* lines up with the outer edge of the grey box */
  left: -1px;
  border-top: var(--frame-thickness) solid var(--accent);
  border-left: var(--frame-thickness) solid var(--accent);
}

nav a::after {
  bottom: -1px;
  right: -1px;
  border-bottom: var(--frame-thickness) solid var(--accent);
  border-right: var(--frame-thickness) solid var(--accent);
}

nav a:hover,
nav a:focus-visible {
  color: var(--accent);
  opacity: 1;
  text-shadow: 0 0 0.6em rgba(0, 255, 185, 0.45);
  border-color: transparent;                     /* the grey box fades out as the green corners take over */
  background-color: transparent;
  outline: none;                                 /* the corner frames are the focus indicator */
  transition: color 0.3s ease, opacity 0.3s ease, text-shadow 0.3s ease,
              border-color 0.5s ease, background-color 0.5s ease;
}

nav a:hover::before,
nav a:hover::after,
nav a:focus-visible::before,
nav a:focus-visible::after {
  opacity: 1;
  /* hovering: appear on the box corners, then slide outward */
  transition: transform 0.6s cubic-bezier(0.22, 0.8, 0.2, 1),
              opacity 0.15s ease 0s;
}

nav a:hover::before,
nav a:focus-visible::before {
  transform: translate(calc(var(--frame-out-x) * -1), calc(var(--frame-out-y) * -1));
}

nav a:hover::after,
nav a:focus-visible::after {
  transform: translate(var(--frame-out-x), var(--frame-out-y));
}

@media (prefers-reduced-motion: reduce) {
  .hero { transition: none; }
  nav a, nav a::before, nav a::after { transition: none; }
}