/* ==========================================================================
   X-PLAN · xplan.sa — base.css
   The Disciplined Document, on screen. Brand Guidelines v1.0 (LOCKED).
   Tokens, reset, typography, layout primitives, the X-Blade, motion utilities.
   Six colours only. Inter 200–900. One amber per view. Monumental vs meticulous.
   ========================================================================== */

/* ---- Self-hosted Inter (offline / fast / no FOUT swap jank) -------------- */
@font-face{font-family:'Inter';font-weight:200;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-200-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:300;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-300-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:400;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-400-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:500;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-500-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:600;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-600-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:700;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-700-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:800;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-800-normal.woff2') format('woff2');}
@font-face{font-family:'Inter';font-weight:900;font-style:normal;font-display:swap;
  src:url('../assets/fonts/inter-latin-900-normal.woff2') format('woff2');}

/* ---- Design tokens ------------------------------------------------------- */
:root{
  /* Palette — the ONLY colours permitted (v1.0). No new hues, ever. */
  --ink:#0A0A0A;
  --canvas:#FAFAF7;
  --amber:#E8A33D;            /* Signal Amber — one element per view */
  --amber-deep:#C4821E;
  --graphite:#3D3D3D;
  --mist:#E8E6E0;
  --hairline:#D9D6CE;        /* derived from Mist */

  /* Ink-on-ink tonal steps (canvas at opacity) — never new hues */
  --on-ink-90:rgba(250,250,247,.92);
  --on-ink-70:rgba(250,250,247,.70);
  --on-ink-46:rgba(250,250,247,.46);
  --on-ink-22:rgba(250,250,247,.20);
  --hairline-ink:rgba(250,250,247,.16);

  /* Type — monumental display against meticulous labels. The gap is the brand. */
  --ff:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif;
  --fs-mega:clamp(3.2rem,9vw,8.5rem);     /* hero hero */
  --fs-display:clamp(2.4rem,6vw,5rem);    /* section heroes */
  --fs-h1:clamp(2rem,4.2vw,3.4rem);
  --fs-h2:clamp(1.5rem,2.6vw,2.1rem);
  --fs-h3:1.18rem;
  --fs-lead:clamp(1.05rem,1.6vw,1.32rem);
  --fs-body:1.0rem;
  --fs-small:.875rem;
  --fs-eyebrow:.72rem;       /* 11–12px, tracked way out */

  /* Spacing scale */
  --gap-xs:.5rem; --gap-sm:1rem; --gap-md:1.75rem; --gap-lg:3rem;
  --gap-xl:5rem;  --gap-2xl:8rem;
  --margin-x:clamp(1.5rem,6vw,7rem);   /* the space IS the luxury */
  --section-y:clamp(5rem,11vw,11rem);
  --maxw:1320px;

  /* Motion */
  --ease-out:cubic-bezier(.22,1,.36,1);
  --ease-io:cubic-bezier(.65,.05,.36,1);
  --dur:.7s;

  --radius:3px;              /* meticulous, not rounded-friendly */
  --header-h:76px;
}

/* ---- Reset --------------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
body{
  font-family:var(--ff);background:var(--canvas);color:var(--ink);
  font-size:var(--fs-body);line-height:1.65;font-weight:400;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
  font-feature-settings:"ss01" 1,"cv05" 1;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit;}
ul{list-style:none;}
::selection{background:var(--amber);color:var(--ink);}

/* ---- Type primitives ----------------------------------------------------- */
.eyebrow{
  font-size:var(--fs-eyebrow);font-weight:600;letter-spacing:.28em;
  text-transform:uppercase;color:var(--graphite);
  display:inline-flex;align-items:center;gap:1rem;
}
.eyebrow::before{
  content:"";width:2.2rem;height:1.5px;background:var(--amber);flex-shrink:0;
}
.eyebrow--plain::before{display:none;}
.eyebrow--rev{color:var(--on-ink-70);}

.display{
  font-size:var(--fs-display);font-weight:800;line-height:.98;
  letter-spacing:-.025em;color:var(--ink);
}
.h1{font-size:var(--fs-h1);font-weight:800;line-height:1.02;letter-spacing:-.022em;}
.h2{font-size:var(--fs-h2);font-weight:700;line-height:1.08;letter-spacing:-.018em;}
.h3{font-size:var(--fs-h3);font-weight:700;letter-spacing:-.01em;}
.lead{font-size:var(--fs-lead);font-weight:300;line-height:1.5;color:var(--graphite);}
.lead strong{font-weight:600;color:var(--ink);}
.muted{color:var(--graphite);}
.amber{color:var(--amber-deep);}

/* On-ink variants */
.on-ink{color:var(--on-ink-90);}
.on-ink .lead,.lead--rev{color:var(--on-ink-70);}
.on-ink .display,.on-ink .h1,.on-ink .h2,.on-ink .h3{color:var(--canvas);}

/* Any dark section flips display/headings to canvas automatically (the common case). */
.section--ink .display,.section--ink .h1,.section--ink .h2,.section--ink .h3,
.cta .display,.phero h1,.phero .display{color:var(--canvas);}
.section--ink .lead{color:var(--on-ink-70);}

/* ---- Layout primitives --------------------------------------------------- */
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:var(--margin-x);}
.section{padding-block:var(--section-y);position:relative;overflow:hidden;}
.section--ink{background:var(--ink);color:var(--on-ink-90);}
.section--canvas{background:var(--canvas);}
.section--mist{background:var(--mist);}

.stack-sm>*+*{margin-top:var(--gap-sm);}
.stack-md>*+*{margin-top:var(--gap-md);}
.stack-lg>*+*{margin-top:var(--gap-lg);}

/* hairline rule */
.rule{height:1px;background:var(--hairline);border:0;width:100%;}
.rule--ink{background:var(--hairline-ink);}

/* ---- The X-Blade — the one amber motion device --------------------------
   A forward-up amber blade cropped by a section edge. Inline SVG, literal hex.
   One per view. Variants set position/size. */
.xblade{position:absolute;pointer-events:none;z-index:1;}
.xblade svg{width:100%;height:100%;display:block;}
.xblade--corner{right:0;bottom:0;width:min(34vw,420px);height:min(34vw,420px);opacity:.9;}
.xblade--rise{right:3%;top:0;width:min(10vw,96px);height:100%;opacity:.9;}
.xblade--edge{right:0;top:18%;width:min(20vw,200px);height:64px;}

/* ---- Buttons ------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;gap:.7rem;
  font-size:.82rem;font-weight:600;letter-spacing:.04em;
  padding:.95rem 1.6rem;border-radius:var(--radius);
  transition:transform .4s var(--ease-out),background .3s,color .3s,border-color .3s;
  position:relative;white-space:nowrap;
}
.btn svg{width:1.05em;height:1.05em;transition:transform .4s var(--ease-out);}
.btn:hover svg{transform:translateX(4px);}
.btn--amber{background:var(--amber);color:var(--ink);}
.btn--amber:hover{background:var(--amber-deep);transform:translateY(-2px);}
.btn--ink{background:var(--ink);color:var(--canvas);}
.btn--ink:hover{transform:translateY(-2px);}
.btn--ghost{border:1px solid var(--hairline);color:var(--ink);}
.btn--ghost:hover{border-color:var(--ink);transform:translateY(-2px);}
.btn--ghost-rev{border:1px solid var(--on-ink-22);color:var(--canvas);}
.btn--ghost-rev:hover{border-color:var(--canvas);background:var(--on-ink-22);}

/* ---- Scroll-reveal (JS adds .is-in) -------------------------------------- */
.reveal{opacity:0;transform:translateY(26px);
  transition:opacity .9s var(--ease-out),transform .9s var(--ease-out);}
.reveal.is-in{opacity:1;transform:none;}
.reveal-d1{transition-delay:.08s;} .reveal-d2{transition-delay:.16s;}
.reveal-d3{transition-delay:.24s;} .reveal-d4{transition-delay:.32s;}
.reveal-d5{transition-delay:.40s;} .reveal-d6{transition-delay:.48s;}

@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none;}
  *{animation-duration:.001ms!important;animation-iteration-count:1!important;}
}

/* ---- Accessibility ------------------------------------------------------- */
:focus-visible{outline:2px solid var(--amber);outline-offset:3px;border-radius:2px;}
.skip{position:absolute;left:-999px;top:0;background:var(--ink);color:var(--canvas);
  padding:.8rem 1.2rem;z-index:2000;}
.skip:focus{left:.5rem;top:.5rem;}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;}