/* ============================================================================
   SeelamGlobal — Premium design system
   Design tokens, type scale, spacing, components and motion utilities.
   Shared across the statically-rendered pages (index.html, how-it-works).
   ========================================================================== */

/* ---- Design tokens ------------------------------------------------------- */
:root{
  /* Core palette — one confident accent (bronze) on a warm ink/paper neutral range */
  --ink:#141E33;            /* primary text + dark surfaces */
  --ink-soft:#37435C;       /* secondary text */
  --muted:#6A7284;          /* tertiary text, captions */
  --line:#E1DBCD;           /* hairlines */
  --line-strong:#CFC7B4;
  --paper:#F7F4EC;          /* page surface */
  --paper-2:#EFEBE0;        /* raised neutral surface */
  --paper-3:#E7E2D4;        /* deeper neutral surface */
  --accent:#B4713C;         /* the one confident accent */
  --accent-2:#9A5E2E;       /* accent, pressed / deeper */
  --gold:#977A3E;           /* small eyebrow labels */

  /* Legacy DC variables kept in sync so shared SVG snippets stay themeable */
  --color-navy:var(--ink);
  --color-accent:var(--accent);
  --color-gold:var(--gold);
  --color-slate:var(--ink-soft);
  --color-muted:var(--muted);
  --color-paper:var(--paper);
  --color-fog:var(--paper-2);
  --color-line:var(--line);

  /* Elevation */
  --shadow-sm:0 1px 2px rgba(20,30,51,.06), 0 2px 6px rgba(20,30,51,.05);
  --shadow-md:0 6px 16px rgba(20,30,51,.08), 0 14px 40px rgba(20,30,51,.08);
  --shadow-lg:0 18px 40px rgba(20,30,51,.14), 0 40px 90px rgba(20,30,51,.14);
  --shadow-accent:0 10px 30px rgba(180,113,60,.28);

  /* Radii */
  --r-sm:8px; --r-md:12px; --r-lg:18px; --r-xl:26px; --r-pill:999px;

  /* Fluid type scale (~1.22 ratio) */
  --step--1:clamp(.82rem,.79rem + .12vw,.9rem);
  --step-0:clamp(1rem,.96rem + .2vw,1.125rem);
  --step-1:clamp(1.2rem,1.12rem + .35vw,1.4rem);
  --step-2:clamp(1.45rem,1.32rem + .6vw,1.85rem);
  --step-3:clamp(1.75rem,1.5rem + 1.1vw,2.4rem);
  --step-4:clamp(2.1rem,1.7rem + 1.9vw,3.25rem);
  --step-5:clamp(2.6rem,1.9rem + 3.2vw,4.5rem);

  /* Spacing scale (4px base) */
  --sp-1:.25rem; --sp-2:.5rem; --sp-3:.75rem; --sp-4:1rem; --sp-5:1.5rem;
  --sp-6:2rem; --sp-7:2.75rem; --sp-8:3.5rem; --sp-9:5rem; --sp-10:7rem; --sp-11:9rem;

  /* Reading measure + container */
  --measure:34em;
  --container:1200px;

  /* Motion */
  --ease:cubic-bezier(.22,.61,.36,1);
  --ease-out:cubic-bezier(.16,1,.3,1);
  --dur-1:.18s; --dur-2:.35s; --dur-3:.6s; --dur-4:.9s;

  --sans:'Hanken Grotesk',system-ui,-apple-system,Segoe UI,Roboto,sans-serif;
  --serif:'Spectral',Georgia,'Times New Roman',serif;

  /* Fixed brand surfaces (do NOT invert with theme) */
  --brand-navy:#0F1A2E;
  --brand-cream:#F3EEE1;
  /* Two-tone wordmark: SEELAM (ink) + GLOBAL (blue) */
  --wm-seelam:#16223D;
  --wm-global:#2F6DB5;
}

[data-theme="dark"]{
  --wm-seelam:#EFE6D2;
  --wm-global:#7FB2EA;
}

[data-theme="dark"]{
  --ink:#EFE6D2;
  --ink-soft:#C3CCDD;
  --muted:#8B95AC;
  --line:#25324C;
  --line-strong:#31405E;
  --paper:#0B1324;
  --paper-2:#111C31;
  --paper-3:#16233B;
  --accent:#D98F55;
  --accent-2:#E0A06E;
  --gold:#C79E62;

  --shadow-sm:0 1px 2px rgba(0,0,0,.4);
  --shadow-md:0 8px 22px rgba(0,0,0,.45);
  --shadow-lg:0 24px 60px rgba(0,0,0,.55);
  --shadow-accent:0 10px 30px rgba(217,143,85,.25);
}

/* ---- Reset + base -------------------------------------------------------- */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto;}}
html,body{margin:0;padding:0;}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:var(--step-0);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  transition:background .5s var(--ease), color .5s var(--ease);
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%;}
a{color:var(--accent);text-decoration:none;transition:color var(--dur-1) var(--ease);}
a:hover{color:var(--accent-2);}
::selection{background:var(--accent);color:#fff;}

h1,h2,h3{font-family:var(--serif);font-weight:400;color:var(--ink);margin:0;}
h1{font-size:var(--step-5);line-height:1.02;letter-spacing:-.018em;}
h2{font-size:var(--step-4);line-height:1.08;letter-spacing:-.014em;}
h3{font-size:var(--step-2);line-height:1.15;letter-spacing:-.01em;}
p{margin:0;}

:focus-visible{outline:2.5px solid var(--accent);outline-offset:3px;border-radius:3px;}

/* ---- Layout helpers ------------------------------------------------------ */
.container{max-width:var(--container);margin-inline:auto;padding-inline:clamp(20px,5vw,28px);}
.section{padding-block:clamp(3.5rem,7vw,7rem);}
.measure{max-width:var(--measure);}
.center{text-align:center;margin-inline:auto;}
.eyebrow{
  display:inline-flex;align-items:center;gap:.6em;
  font-size:.72rem;font-weight:600;letter-spacing:.24em;text-transform:uppercase;
  color:var(--gold);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--accent);}
.lead{font-size:var(--step-1);line-height:1.55;color:var(--ink-soft);}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:var(--paper);padding:10px 16px;z-index:300;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;}

/* Grain / depth overlay */
.grain{position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(var(--line) 1px,transparent 1px);background-size:26px 26px;
  -webkit-mask-image:radial-gradient(circle at 50% 30%,#000,transparent 85%);
          mask-image:radial-gradient(circle at 50% 30%,#000,transparent 85%);}

/* ---- Buttons ------------------------------------------------------------- */
.btn{
  --btn-bg:var(--ink);--btn-fg:var(--paper);
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  font-family:var(--sans);font-size:.95rem;font-weight:600;line-height:1;
  padding:.95em 1.6em;border-radius:var(--r-md);border:1px solid transparent;
  background:var(--btn-bg);color:var(--btn-fg);cursor:pointer;
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur-1) var(--ease),box-shadow var(--dur-2) var(--ease),background var(--dur-2) var(--ease),color var(--dur-2) var(--ease);
  will-change:transform;
}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);color:var(--btn-fg);}
.btn:active{transform:translateY(0) scale(.985);box-shadow:var(--shadow-sm);}
.btn-primary{--btn-bg:var(--accent);--btn-fg:#fff;}
.btn-primary:hover{--btn-bg:var(--accent-2);box-shadow:var(--shadow-accent);}
.btn-ink{--btn-bg:var(--ink);--btn-fg:var(--paper);}
.btn-ghost{--btn-bg:transparent;--btn-fg:var(--ink);border-color:var(--line-strong);box-shadow:none;}
.btn-ghost:hover{border-color:var(--ink);background:transparent;box-shadow:none;}

/* ---- Cards --------------------------------------------------------------- */
.card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-sm);
  transition:transform var(--dur-2) var(--ease),box-shadow var(--dur-2) var(--ease),border-color var(--dur-2) var(--ease);
}
.card.lift:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong);}

/* ---- Scroll reveal ------------------------------------------------------- */
.reveal{opacity:0;transform:translateY(22px);
  transition:opacity var(--dur-3) var(--ease-out),transform var(--dur-3) var(--ease-out);
  transition-delay:var(--reveal-delay,0ms);}
.reveal.is-visible{opacity:1;transform:none;}

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

/* ---- Brand mark + two-tone wordmark ------------------------------------- */
.brand{display:inline-flex;align-items:center;gap:12px;}
.brand-mark{display:inline-flex;flex:none;color:var(--wm-seelam);}
.brand-mark svg{width:32px;height:32px;display:block;fill:currentColor;}
.brand-mark--lg svg{width:42px;height:42px;}
.wordmark{font-family:var(--serif);font-weight:600;letter-spacing:.06em;text-transform:uppercase;line-height:1;font-size:1.15rem;}
.wordmark--lg{font-size:1.35rem;}
.wordmark .s{color:var(--wm-seelam);}
.wordmark .g{color:var(--wm-global);}

/* ---- Permanent dark surfaces (footer, stat strip, CTA panels) ----------
   Pin theme variables locally so these panels stay dark & legible in BOTH
   light and dark modes instead of inverting to cream in dark mode. -------- */
.on-dark{
  --ink:#0F1A2E; --ink-soft:#C9D2E2; --muted:#93A0B8;
  --paper:#F3EEE1; --paper-2:#16233B; --paper-3:#1C2B45;
  --line:#26324A; --line-strong:#33415E;
  --accent:#D98F55; --accent-2:#E0A06E; --gold:#C79E62;
  --wm-seelam:var(--brand-cream); --wm-global:#7FB2EA;
}