/* =============================================================================
   SAURON — STYLES
   Design tokens live in :root. Change the palette or the spacing scale there
   and it propagates everywhere; nothing below hardcodes a colour.
   ========================================================================== */

:root {
  /* --- Colour ----------------------------------------------------------- */
  --bg:           #0a0a0a;   /* page ground */
  --bg-raise:     #101010;   /* inputs, subtle panels */
  --accent:       #ffffff;   /* the single sharp accent — change this one line */
  --fg:           #f2f2f2;   /* primary text */
  --fg-mid:       #9a9a9a;   /* body copy */
  --fg-dim:       #6a6a6a;   /* mono labels, metadata */
  --fg-faint:     #3a3a3a;   /* deep background text */
  --hairline:     #212121;   /* 1px dividers */
  --hairline-lit: #3d3d3d;   /* hover / focus dividers */
  --danger:       #ff5a4d;

  /* --- Spacing scale ---------------------------------------------------- */
  --s1: 0.5rem;  --s2: 1rem;   --s3: 1.5rem;  --s4: 2rem;
  --s5: 3rem;    --s6: 4.5rem; --s7: 7rem;    --s8: 10rem;
  --gutter: clamp(1.25rem, 4vw, 4rem);   /* page side padding */
  --gap:    clamp(1rem, 2vw, 2rem);      /* grid gutter */
  --section-y: clamp(4rem, 9vw, 9rem);   /* vertical section rhythm */

  /* --- Type ------------------------------------------------------------- */
  /* One typeface throughout. A monospace face was used for small labels and
     read as pixelated next to the display type, so it is gone. Labels get
     their character from case and tracking instead. */
  --display: 'Inter Tight', 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --mono: var(--display);

  /* --- Light region (everything below the hero) ------------------------- */
  --paper:      #f1f1ea;
  --ink:        #14150f;
  --ink-mid:    #55564f;
  --ink-dim:    #7b7c73;
  --ink-rule:   #d2d2c8;
  --rail:       clamp(1.25rem, 3.5vw, 4rem);

  /* --- Motion — short, sharp, no bounce --------------------------------- */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --t-fast: 150ms;
  --t-base: 240ms;
}

/* ---------- Reset ---------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--display);
  font-size: clamp(0.95rem, 0.9rem + 0.2vw, 1.0625rem);
  line-height: 1.6;
  font-synthesis-weight: none;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; }
h1, h2, h3, p, figure { margin: 0; }
a { color: inherit; text-decoration: none; }
button, input, textarea, select { font: inherit; color: inherit; }
/* Without this, some browsers paint the native control no matter what the
   background is set to. That is what turned the header and footer triggers
   into white boxes. */
button { appearance: none; -webkit-appearance: none; background: none; border: 0; }
::selection { background: var(--accent); color: var(--bg); }
:focus-visible { outline: 1px solid var(--accent); outline-offset: 3px; }

/* ---------- Primitives ----------------------------------------------------- */
.mono {
  font-family: var(--display);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-dim);
  font-weight: 500;
}
.rule { border: 0; border-top: 1px solid var(--hairline); margin: 0; }
.shell { padding-inline: var(--gutter); }

/* Asymmetric 12-column grid: a narrow label rail, a wide content field. */
.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
}
.rail    { grid-column: 1 / 4; }
.field   { grid-column: 4 / 13; }
.field-n { grid-column: 4 / 11; }   /* narrower measure for reading copy */

@media (max-width: 860px) {
  .rail, .field, .field-n { grid-column: 1 / 13; }
  .rail { margin-bottom: var(--s2); }
}

/* ---------- Header --------------------------------------------------------- */
.hdr {
  position: fixed; inset: 0 0 auto 0; z-index: 60;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s3);
  padding: var(--s2) var(--gutter);
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background var(--t-base) var(--ease), border-color var(--t-base) var(--ease);
}
.hdr[data-stuck='true'] {
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--hairline);
}
.hdr__mark { display: flex; align-items: center; gap: 0.625rem; }
.hdr__mark img { width: 15px; height: auto; }
.hdr__mark span {
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.3em; text-transform: uppercase; color: var(--fg);
}
.hdr__nav { display: flex; gap: var(--s3); }
.hdr__nav a { position: relative; padding-block: 2px; transition: color var(--t-fast) linear; }
.hdr__nav a:hover { color: var(--accent); }
.hdr__nav a::after {
  content: ''; position: absolute; inset: auto 0 0 0; height: 1px;
  background: var(--accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-base) var(--ease);
}
.hdr__nav a:hover::after { transform: scaleX(1); }
@media (max-width: 700px) { .hdr__nav a:not(.hdr__cta) { display: none; } }

/* ---------- Hero ----------------------------------------------------------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: calc(var(--s8) + var(--s4)) var(--gutter) var(--s5);
  border-bottom: 1px solid var(--hairline);
  overflow: hidden;
}
.hero__media { position: absolute; inset: 0; z-index: 0; background: var(--bg); }
.hero__media video {
  position: absolute; inset: 0;
  width: 100%; height: 100%; object-fit: cover;
  opacity: 0;
  transition: none;            /* HARD CUT — never soften this to a fade */
}
.hero__media video.is-live { opacity: 1; }
/* Legibility scrim: flat, directional, no soft radial glow. */
.hero__media::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgb(10 10 10 / 0.72) 0%, rgb(10 10 10 / 0.35) 38%,
    rgb(10 10 10 / 0.62) 74%, rgb(10 10 10 / 0.92) 100%);
}
.hero__inner { position: relative; z-index: 1; width: 100%; }
.hero__eyebrow { display: block; margin-bottom: var(--s3); color: var(--fg-mid); }
.hero__h1 {
  font-size: clamp(2.35rem, 6.1vw, 6.25rem);
  line-height: 0.94;
  letter-spacing: -0.035em;
  font-weight: 600;
  text-wrap: balance;
  max-width: 17ch;
}
.hero__standfirst {
  margin-top: var(--s3);
  max-width: 56ch;
  color: var(--fg-mid);
  font-size: clamp(0.95rem, 0.88rem + 0.35vw, 1.1875rem);
}
.hero__actions { margin-top: var(--s4); display: flex; align-items: center; gap: var(--s4); flex-wrap: wrap; }

/* Clip readout — the "which clip are we on" ticker, bottom right of hero. */
.hero__readout {
  position: absolute; right: var(--gutter); bottom: var(--s5);
  z-index: 1; display: flex; gap: var(--s2); align-items: center;
}
.hero__ticks { display: flex; gap: 6px; }
.hero__tick { width: 22px; height: 2px; background: var(--hairline-lit); }
.hero__tick.is-live { background: var(--accent); }
@media (max-width: 860px) { .hero__readout { display: none; } }

/* ---------- Button --------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.75rem;
  padding: 0.875rem 1.5rem;
  border: 1px solid var(--accent);
  background: transparent; color: var(--accent);
  font-family: var(--display); font-size: 0.72rem; font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase;
  cursor: pointer;
  transition: background var(--t-fast) linear, color var(--t-fast) linear;
}
.btn:hover:not(:disabled) { background: var(--accent); color: var(--bg); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn__arrow { transition: transform var(--t-base) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(4px); }
.btn--ghost { border-color: var(--hairline-lit); color: var(--fg-mid); }
.btn--ghost:hover { border-color: var(--accent); }

/* ---------- Sections ------------------------------------------------------- */
.sec { padding-block: var(--section-y); border-bottom: 1px solid var(--hairline); }
.sec__head { margin-bottom: var(--s6); }
.sec__title {
  font-size: clamp(1.8rem, 3.4vw, 3.15rem);
  line-height: 1.03; letter-spacing: -0.028em; font-weight: 600;
  text-wrap: balance; max-width: 22ch;
}
.sec__label { display: block; }
.sec__standfirst { margin-top: var(--s3); color: var(--fg-mid); max-width: 58ch; }
.light .sec__standfirst { color: var(--ink-mid); }

/* --- Capability rows --- */
.cap {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--gap);
  padding-block: var(--s4);
  border-top: 1px solid var(--hairline);
  transition: border-color var(--t-base) var(--ease);
}
.cap:last-child { border-bottom: 1px solid var(--hairline); }
.cap:hover { border-top-color: var(--hairline-lit); }
.cap__n { grid-column: 1 / 3; color: var(--fg-faint); font-size: 0.78rem; font-weight: 500; letter-spacing: 0.1em; }
.cap__t { grid-column: 3 / 7; font-size: clamp(1.1rem, 1.35vw, 1.4rem); line-height: 1.22; letter-spacing: -0.015em; font-weight: 600; }
.cap__b { grid-column: 7 / 12; color: var(--fg-mid); max-width: 46ch; }
@media (max-width: 860px) {
  .cap { padding-block: var(--s3); row-gap: var(--s1); }
  .cap__n, .cap__t, .cap__b { grid-column: 1 / 13; }
}

/* --- Proof strip --- */
.proof { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--hairline); }
.proof__i { padding: var(--s4) var(--s3) var(--s4) 0; border-right: 1px solid var(--hairline); }
.proof__i:last-child { border-right: 0; }
.proof__i:not(:first-child) { padding-left: var(--s3); }
.proof__s { font-size: clamp(1.25rem, 2vw, 1.85rem); letter-spacing: -0.03em; font-weight: 600; line-height: 1.1; }
.proof__b { margin-top: var(--s1); color: var(--fg-mid); font-size: 0.875rem; }
@media (max-width: 860px) {
  .proof { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .proof__i:nth-child(2n) { border-right: 0; }
  .proof__i:nth-child(-n+2) { border-bottom: 1px solid var(--hairline); }
  /* first item of each row loses the inter-column indent */
  .proof__i:not(:first-child):nth-child(odd) { padding-left: 0; }
}
@media (max-width: 480px) {
  .proof { grid-template-columns: 1fr; }
  .proof__i { border-right: 0; border-bottom: 1px solid var(--hairline); }
  .proof__i:not(:first-child) { padding-left: 0; }
  .proof__i:last-child { border-bottom: 0; }
}

/* --- About ---
   NOTE: the CSP in _headers forbids inline styles, so spacing that used to be
   a style="" attribute in build.js lives here. Keep it that way. */
.about__title { margin-bottom: var(--s4); }
.about p + p { margin-top: var(--s3); }
.about p { color: var(--fg-mid); max-width: 62ch; font-size: clamp(1rem, 0.95rem + 0.25vw, 1.125rem); }
.about p:first-child { color: var(--fg); }

/* ---------- Form ----------------------------------------------------------- */
.enq__standfirst { margin-top: var(--s3); color: var(--fg-mid); max-width: 52ch; }
.form {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--s3) var(--gap);
  margin-top: var(--s5);
}
.f { display: flex; flex-direction: column; gap: 0.5rem; }
.f--wide { grid-column: 1 / -1; }
.f label { color: var(--fg-dim); }
.f label .req { color: var(--fg-faint); }
.f input, .f textarea {
  width: 100%;
  padding: 0.8125rem 0.9375rem;
  background: var(--bg-raise);
  border: 1px solid var(--hairline);
  border-radius: 0;
  transition: border-color var(--t-fast) linear, background var(--t-fast) linear;
}
.f textarea { resize: vertical; min-height: 8.5rem; }
.f input::placeholder, .f textarea::placeholder { color: var(--fg-faint); }
.f input:hover, .f textarea:hover { border-color: var(--hairline-lit); }
.f input:focus, .f textarea:focus { outline: none; border-color: var(--accent); background: var(--bg); }
.f[data-invalid='true'] input, .f[data-invalid='true'] textarea { border-color: var(--danger); }
.f__err { color: var(--danger); font-size: 0.75rem; letter-spacing: 0.02em; min-height: 1em; }
/* Honeypot — off-screen, never displayed, hidden from assistive tech. */
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

.form__foot { grid-column: 1 / -1; display: flex; align-items: center; gap: var(--s3); flex-wrap: wrap; margin-top: var(--s1); }
.form__status { font-size: 0.72rem; font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; }
.form__status[data-tone='ok']   { color: var(--accent); }
.form__status[data-tone='err']  { color: var(--danger); }
.form__status[data-tone='busy'] { color: var(--fg-dim); }
/* Direct contact block under the form — email / phone / location. */
.direct { margin: var(--s5) 0 0; padding-top: var(--s3); border-top: 1px solid var(--hairline); }
.direct__row {
  display: grid; grid-template-columns: 7.5rem 1fr; gap: var(--s2);
  padding-block: 0.5rem;
}
.direct dt { color: var(--fg-dim); }
.direct dd { margin: 0; color: var(--fg); }
.direct a { border-bottom: 1px solid var(--hairline-lit); }
.direct a:hover { color: var(--accent); border-bottom-color: var(--accent); }
@media (max-width: 520px) {
  .direct__row { grid-template-columns: 1fr; gap: 0.125rem; }
}
@media (max-width: 700px) { .form { grid-template-columns: 1fr; } }

/* ---------- Enquiries tab -------------------------------------------------
   The only control in the header. Clicking it slides the panel across. */
.tab {
  display: inline-flex; align-items: center; gap: 0.6rem;
  padding: 0.6rem 1.05rem;
  border: 1px solid var(--hairline-lit);
  color: var(--fg);
  font-size: 0.6875rem; letter-spacing: 0.16em; text-transform: uppercase;
  cursor: pointer;
  transition: background var(--t-fast) linear, color var(--t-fast) linear,
              border-color var(--t-fast) linear;
}
.tab:hover { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.tab__arrow { transition: transform var(--t-base) var(--ease); }
.tab:hover .tab__arrow { transform: translateX(3px); }

/* ---------- Enquiry panel --------------------------------------------------
   A light slide-over across the dimmed page. Its own local palette, so the
   dark-page tokens do not leak into it. Behaviour is in src/drawer.js. */
.drawer { position: fixed; inset: 0; z-index: 200; }
.drawer[hidden] { display: none; }

.drawer__scrim {
  position: absolute; inset: 0;
  background: rgb(4 4 4 / 0.72);
  opacity: 0;
  transition: opacity var(--t-base) var(--ease);
}
.drawer[data-open='true'] .drawer__scrim { opacity: 1; }

.drawer__panel {
  --panel-fg: #14150f;
  --panel-mid: #55564f;
  --panel-rule: #c9c9c0;

  position: absolute; inset: 0 0 0 auto;
  width: min(46rem, 100%);
  background: #f2f2ec;
  color: var(--panel-fg);
  transform: translateX(100%);
  transition: transform 320ms var(--ease);
  overflow-y: auto;
  overscroll-behavior: contain;
}
.drawer[data-open='true'] .drawer__panel { transform: none; }
.drawer__panel:focus { outline: none; }
.drawer__panel ::selection { background: var(--panel-fg); color: #f2f2ec; }

.drawer__close {
  position: sticky; top: 0; float: left;
  margin: 1.15rem 0 0 1.35rem;
  width: 2rem; height: 2rem;
  display: grid; place-items: center;
  color: var(--panel-fg);
  font-size: 1.5rem; line-height: 1; cursor: pointer;
  opacity: 0.65; transition: opacity var(--t-fast) linear;
}
.drawer__close:hover { opacity: 1; }
.drawer__close:focus-visible { outline: 1px solid var(--panel-fg); outline-offset: 2px; }

.drawer__inner {
  padding: clamp(3.5rem, 6vw, 5rem) clamp(1.5rem, 5vw, 4.5rem) clamp(2.5rem, 5vw, 4rem);
  max-width: 40rem;
}
.drawer__eyebrow { color: var(--panel-mid); margin-bottom: clamp(2rem, 5vw, 3.5rem); }
.drawer__title {
  font-size: clamp(1.6rem, 2.6vw, 2.35rem);
  line-height: 1.14; letter-spacing: -0.022em; font-weight: 500;
  text-wrap: balance;
}
.drawer__intro {
  margin-top: var(--s2); color: var(--panel-mid);
  font-size: 0.9375rem; max-width: 34rem;
}
.drawer__note {
  margin-top: var(--s4); padding-top: var(--s2);
  border-top: 1px solid var(--panel-rule);
  color: var(--panel-mid); font-size: 0.75rem;
}

/* Underline fields, per the reference. */
.form--drawer { grid-template-columns: 1fr; margin-top: clamp(2rem, 4vw, 3rem); gap: var(--s4); }
.form--drawer .f { gap: 0.4rem; }
.form--drawer label { color: var(--panel-mid); }
.form--drawer .req { color: #a8471f; }
.form--drawer input,
.form--drawer textarea {
  background: transparent;
  border: 0; border-bottom: 1px solid var(--panel-rule);
  border-radius: 0; padding: 0.55rem 0 0.5rem;
  color: var(--panel-fg);
}
.form--drawer textarea { min-height: 6.5rem; border: 1px solid var(--panel-rule); padding: 0.75rem; }
.form--drawer input:hover, .form--drawer textarea:hover { border-color: var(--panel-mid); }
.form--drawer input:focus, .form--drawer textarea:focus {
  outline: none; border-color: var(--panel-fg); background: transparent;
}
.form--drawer .f[data-invalid='true'] input,
.form--drawer .f[data-invalid='true'] textarea { border-color: #a8471f; }
.form--drawer .f__err { color: #a8471f; }
.form--drawer .form__status[data-tone='ok'] { color: var(--panel-fg); }
.form--drawer .form__status[data-tone='err'] { color: #a8471f; }
.form--drawer .form__status[data-tone='busy'] { color: var(--panel-mid); }

.btn--solid {
  border-color: var(--panel-fg); color: var(--panel-fg);
  padding: 0.8rem 2.4rem;
}
.btn--solid:hover:not(:disabled) { background: var(--panel-fg); color: #f2f2ec; }

@media (prefers-reduced-motion: reduce) {
  .drawer__panel, .drawer__scrim { transition: none; }
}

.sec--closing { border-bottom: 0; }
.closing__act { margin-top: var(--s4); }

/* ---------- Footer --------------------------------------------------------- */
.ftr { padding-block: var(--s5) var(--s4); }
.ftr__top { display: flex; justify-content: space-between; gap: var(--s4); flex-wrap: wrap; align-items: flex-start; }
.ftr__mark img { width: 130px; opacity: 0.9; }
.ftr__links { display: flex; gap: var(--s3); flex-wrap: wrap; }
.ftr__links a:hover { color: var(--accent); }
.ftr__meta {
  margin-top: var(--s6); padding-top: var(--s2);
  border-top: 1px solid var(--hairline);
  display: flex; justify-content: space-between; gap: var(--s3); flex-wrap: wrap;
}

/* ---------- Scroll reveal --------------------------------------------------
   Applied by src/reveal.js. Elements start shifted + transparent and snap in.
   `.is-in` is the only state class; nothing here bounces or overshoots. */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-base) var(--ease), transform var(--t-base) var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- Reduced motion / no-JS ----------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}
.no-js [data-reveal] { opacity: 1; transform: none; }
.no-js .hero__media video:first-child { opacity: 1; }


/* ---------- Light region ---------------------------------------------------
   Everything below the hero runs on paper with a black rail down the side.
   The dark theme is reserved for the header and the hero clip. */
.light {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  padding-left: var(--rail);
}
/* The rail: one unbroken black edge running the full height. No ticks. */
.light::before {
  content: '';
  position: absolute; inset: 0 auto 0 0; width: var(--rail);
  background: var(--bg);
}

.light .sec { border-bottom-color: var(--ink-rule); }
.light .sec__label,
.light .mono { color: var(--ink-dim); }
.light .sec__title { color: var(--ink); }

.light .cap { border-top-color: var(--ink-rule); }
.light .cap:last-child { border-bottom-color: var(--ink-rule); }
.light .cap:hover { border-top-color: var(--ink); }
.light .cap__n { color: var(--ink-dim); }
.light .cap__t { color: var(--ink); }
.light .cap__b { color: var(--ink-mid); }

.light .proof { border-top-color: var(--ink-rule); }
.light .proof__i { border-right-color: var(--ink-rule); }
.light .proof__s { color: var(--ink); }
.light .proof__b { color: var(--ink-mid); }
@media (max-width: 860px) {
  .light .proof__i:nth-child(-n+2) { border-bottom-color: var(--ink-rule); }
}
@media (max-width: 480px) {
  .light .proof__i { border-bottom-color: var(--ink-rule); }
}

.light .about p { color: var(--ink-mid); }
.light .about p:first-child { color: var(--ink); }
.light .enq__standfirst { color: var(--ink-mid); }

.light .btn { border-color: var(--ink); color: var(--ink); }
.light .btn:hover:not(:disabled) { background: var(--ink); color: var(--paper); }

.light .ftr__meta { border-top-color: var(--ink-rule); color: var(--ink-dim); }
.light .ftr__links a { color: var(--ink-dim); }
.light .ftr__links a:hover { color: var(--ink); }
/* the lockup is white artwork, so it needs inverting on paper */
.light .ftr__mark img { filter: invert(1); opacity: 0.85; }

.light ::selection { background: var(--ink); color: var(--paper); }
.light :focus-visible { outline-color: var(--ink); }


/* ---------- Select --------------------------------------------------------- */
.select { position: relative; display: block; }
.select select {
  appearance: none; -webkit-appearance: none;
  width: 100%;
  background: transparent;
  border: 0; border-bottom: 1px solid var(--panel-rule);
  border-radius: 0;
  padding: 0.55rem 1.75rem 0.5rem 0;
  color: var(--panel-fg);
  cursor: pointer;
}
.select select:invalid { color: var(--panel-mid); }
.select select:hover { border-color: var(--panel-mid); }
.select select:focus { outline: none; border-color: var(--panel-fg); }
.select__arrow {
  position: absolute; right: 0.35rem; top: 50%; transform: translateY(-60%);
  pointer-events: none; color: var(--panel-mid); font-size: 0.85rem;
}
.f[data-invalid='true'] .select select { border-color: #a8471f; }

/* Turnstile widget sits in the flow like any other field. */
.cf-turnstile { margin-top: 0.25rem; min-height: 65px; }