/* =====================================================================
   BigBrainSystems — theme.css
   Design tokens + reset + base typography (theme-onafhankelijk).
   De semantische kleur-variabelen (--bg, --text, ...) worden per variant
   gezet in theme-light.css of theme-dark.css.
   ===================================================================== */

/* ---- Brand-kleuren (vast, ongeacht licht/donker) ---- */
:root {
  --bbs-orange:      #ED7D1C;
  --bbs-orange-600:  #d76c12;
  --bbs-orange-300:  #ffa94d;
  --bbs-orange-100:  #ffe7cc;

  --em-teal:         #1390a3;
  --em-teal-2:       #2bb6c4;
  --em-teal-deep:    #014965;

  --ink:             #121316;
  --ink-2:           #1b1d22;
  --silver:          #b9bbc2;
  --paper:           #f6f7f9;

  /* Typografie */
  --font-display: "Sora", system-ui, sans-serif;
  --font-body:    "IBM Plex Sans", system-ui, sans-serif;
  --font-mono:    "IBM Plex Mono", ui-monospace, monospace;

  /* Vloeiende type-schaal (clamp = responsive zonder breakpoints) */
  --fs-eyebrow: 0.78rem;
  --fs-body:    clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  --fs-lead:    clamp(1.1rem, 1rem + 0.5vw, 1.3rem);
  --fs-h3:      clamp(1.25rem, 1.1rem + 0.7vw, 1.6rem);
  --fs-h2:      clamp(1.9rem, 1.5rem + 1.8vw, 2.9rem);
  --fs-h1:      clamp(2.6rem, 1.9rem + 3.4vw, 4.6rem);

  /* Ruimte & vorm */
  --maxw: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --radius:   16px;
  --radius-lg: 26px;
  --radius-pill: 999px;

  /* Beweging */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.55s;
}

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

a { color: inherit; text-decoration: none; }

button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }

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

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

::selection { background: var(--bbs-orange); color: #fff; }

/* ---- Headings ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--text-strong);
}

h1 { font-size: var(--fs-h1); font-weight: 800; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }

p { color: var(--text-muted); }

/* ---- Layout helpers ---- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(4rem, 9vw, 8rem); }
.section--tight { padding-block: clamp(3rem, 6vw, 5rem); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}

.lead { font-size: var(--fs-lead); color: var(--text-muted); max-width: 56ch; }

.text-orange { color: var(--bbs-orange); }
.text-teal   { color: var(--em-teal-2); }

.grad {
  background: linear-gradient(100deg, var(--bbs-orange-300), var(--bbs-orange));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.grad-teal {
  background: linear-gradient(100deg, var(--em-teal-2), var(--em-teal));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* Lokale teal-accentcontext (bv. EyeManage-pagina) */
.accent-teal {
  --accent: var(--em-teal);
  --accent-strong: var(--em-teal-2);
  --accent-soft: rgba(43,182,196,0.12);
  --accent-glow: rgba(19,144,163,0.5);
}

/* ---- Knoppen ---- */
.btn {
  --btn-bg: var(--accent);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.95em 1.6em;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  border-radius: var(--radius-pill);
  background: var(--btn-bg);
  color: var(--btn-fg);
  position: relative;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s var(--ease);
  will-change: transform;
}
.btn svg { width: 1.1em; height: 1.1em; transition: transform 0.25s var(--ease); }
.btn:hover { transform: translateY(-3px); box-shadow: 0 12px 30px -10px var(--accent-glow); }
.btn:hover svg { transform: translateX(4px); }
.btn:active { transform: translateY(-1px); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--text-strong);
  border: 1.5px solid var(--border-strong);
}
.btn--ghost:hover { background: var(--surface-2); box-shadow: none; border-color: var(--accent); }

.btn--teal { --btn-bg: var(--em-teal); --accent-glow: rgba(19,144,163,0.5); }

/* ---- Animatie bij scroll (gestuurd door main.js) ----
   Verbergen gebeurt alleen als JS aanstaat (.js op <html>); zonder JS
   blijft alle content gewoon zichtbaar. */
.reveal { transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.js .reveal { opacity: 0; transform: translateY(26px); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: 0.08s; }
.reveal[data-delay="2"] { transition-delay: 0.16s; }
.reveal[data-delay="3"] { transition-delay: 0.24s; }
.reveal[data-delay="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}