/* ==========================================================================
   SIMU ARX — Global Design Tokens
   Zentrale Farben & Schriftarten. Änderungen hier wirken auf alle Module.
   ========================================================================== */

:root {
  /* Farben */
  --color-bg:          #0a0a0c;
  --color-bg-alt:      #0e0f11;
  --color-surface:     #131316;
  --color-surface-2:   #1a1b1e;
  --color-border:      #232529;
  --color-border-soft: #1c1d20;

  --color-text:        #f5f7f8;
  --color-text-muted:  #9aa2a6;
  --color-text-faint:  #5c6266;

  --color-accent:      #22d3d9;   /* dezentes Neon-Cyan */
  --color-accent-dim:  #17888c;
  --color-accent-glow: rgba(34, 211, 217, 0.16);

  --color-danger:      #d9534f;

  /* Typografie */
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body:    'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, monospace;

  /* Skala */
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-lg:   1.25rem;
  --fs-xl:   1.75rem;
  --fs-2xl:  2.5rem;
  --fs-3xl:  3.5rem;
  --fs-4xl:  5rem;

  /* Abstände */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  /* Sonstiges */
  --radius-sm: 4px;
  --radius-md: 8px;
  --max-width: 1200px;
  --border-hairline: 1px solid var(--color-border);
  --transition-base: 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==========================================================================
   Reset
   ========================================================================== */

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

html { scroll-behavior: smooth; }

section[id] { scroll-margin-top: 90px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  opacity: 0;
  animation: page-in 480ms ease forwards;
}

@keyframes page-in {
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  body { animation: none; opacity: 1; }
}

::selection {
  background: var(--color-accent);
  color: #04191a;
}

/* Scrollbar (WebKit) */
::-webkit-scrollbar {
  width: 10px;
}
::-webkit-scrollbar-track {
  background: var(--color-bg);
}
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 999px;
  border: 2px solid var(--color-bg);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent-dim);
}

/* Scrollbar (Firefox) */
* {
  scrollbar-color: var(--color-border) var(--color-bg);
  scrollbar-width: thin;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  margin: 0;
  letter-spacing: -0.01em;
}

p { margin: 0; }

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* Sichtbarer Fokus-Zustand (Barrierefreiheit) */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ==========================================================================
   Wiederverwendbare Elemente
   ========================================================================== */

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
}

.eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.9rem;
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform 150ms ease-out, box-shadow var(--transition-base), border-color var(--transition-base), background var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-accent);
  color: #04191a;
}

.btn-primary:hover {
  box-shadow: 0 0 0 1px var(--color-accent), 0 0 28px var(--color-accent-glow);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* HUD-Eckklammern — Signatur-Element */
.hud-frame {
  position: relative;
}

.hud-frame::before,
.hud-frame::after,
.hud-frame > .hud-corner-tl,
.hud-frame > .hud-corner-br {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--color-accent);
  opacity: 0.55;
}

.hud-frame::before {
  top: -1px; left: -1px;
  border-right: none; border-bottom: none;
}

.hud-frame::after {
  bottom: -1px; right: -1px;
  border-left: none; border-top: none;
}

.section {
  padding: var(--space-6) 0;
  border-top: var(--border-hairline);
}

.section-head {
  max-width: 640px;
  margin-bottom: var(--space-5);
}

.section-head h2 {
  font-size: var(--fs-2xl);
  margin-top: var(--space-2);
}

.section-head p {
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

@media (max-width: 768px) {
  :root {
    --fs-4xl: 2.75rem;
    --fs-3xl: 2.25rem;
    --fs-2xl: 1.75rem;
  }
  .section { padding: var(--space-5) 0; }
}

@media (max-width: 420px) {
  :root {
    --fs-4xl: 2.1rem;
  }
  .hero-hud { padding: var(--space-2) var(--space-3) var(--space-2); }
  .hero-slogan { margin-bottom: var(--space-3); line-height: 1.15; }
  .hero-content { padding-bottom: var(--space-4); }
}