/* ============================================================
   APEX DETAILING — base.css
   Design System: Deep Luxury / Midnight Dynamic
   ============================================================ */

/* ---------- FONTS (lokal, DSGVO-konform, SIL OFL) ---------- */
@font-face {
  font-family: 'Sora';
  src: url('/assets/fonts/sora-variable.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215;
}

@font-face {
  font-family: 'Inter';
  src: url('/assets/fonts/inter-variable.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------- DESIGN TOKENS ---------- */
:root {
  /* Base Colors */
  --color-bg-deep:        #08090C;
  --color-bg-elevated:    #101218;
  --color-bg-glass:       rgba(20, 22, 28, 0.55);
  --color-bg-glass-strong:rgba(12, 14, 20, 0.72);

  /* Accent (Electric Blue) */
  --color-accent:         #1E90FF;
  --color-accent-glow:    rgba(30, 144, 255, 0.45);
  --color-accent-soft:    #4DA8FF;

  /* Text */
  --color-text-primary:   #F5F7FA;
  --color-text-muted:     #8A92A3;
  --color-text-chrome:    #D4D4D4;

  /* Borders & Effects */
  --border-glass:         1px solid rgba(255, 255, 255, 0.08);
  --border-glass-strong:  1px solid rgba(255, 255, 255, 0.14);
  --blur-glass:           20px;
  --shadow-glow-accent:   0 0 40px var(--color-accent-glow);
  --shadow-elevated:      0 30px 60px -20px rgba(0, 0, 0, 0.6);

  /* Typography */
  --font-display:         'Sora', system-ui, -apple-system, sans-serif;
  --font-body:            'Inter', system-ui, -apple-system, sans-serif;

  --fs-eyebrow:           clamp(0.75rem, 0.7rem + 0.2vw, 0.875rem);
  --fs-body:              clamp(0.95rem, 0.9rem + 0.2vw, 1.0625rem);
  --fs-sub:               clamp(1rem, 0.95rem + 0.4vw, 1.25rem);
  --fs-h1:                clamp(2.5rem, 1.5rem + 5vw, 5.5rem);

  /* Spacing (8pt) */
  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs:  0.75rem;
  --space-sm:  1rem;
  --space-md:  2rem;
  --space-lg:  4rem;
  --space-xl:  6rem;
  --space-2xl: 9rem;

  /* Layout */
  --container-max:   1400px;
  --container-pad:   clamp(1rem, 3vw, 2.5rem);
  --radius-sm:       8px;
  --radius-md:       16px;
  --radius-lg:       24px;

  /* Motion */
  --ease-smooth:    cubic-bezier(0.65, 0, 0.35, 1);
  --ease-out:       cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast:  240ms;
  --duration-med:   400ms;
  --duration-slow:  600ms;

  /* Z-Index Scale */
  --z-base:      1;
  --z-overlay:   10;
  --z-handle:    20;
  --z-nav:       100;
  --z-skip:      999;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

@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;
  }
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.6;
  color: var(--color-text-primary);
  background: var(--color-bg-deep);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

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

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- UTILITIES ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: var(--z-skip);
  padding: 0.75rem 1.25rem;
  background: var(--color-accent);
  color: #000;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: top var(--duration-fast) var(--ease-smooth);
}
.skip-link:focus { top: 1rem; }

[data-glass] {
  background: var(--color-bg-glass);
  -webkit-backdrop-filter: blur(var(--blur-glass)) saturate(140%);
  backdrop-filter: blur(var(--blur-glass)) saturate(140%);
  border: var(--border-glass);
}

/* ---------- HEADER / NAV ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-sm) var(--container-pad);
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 0.95rem;
}
.nav__brand-mark {
  color: var(--color-accent);
  text-shadow: 0 0 12px var(--color-accent-glow);
}
.nav__brand-text span {
  color: var(--color-text-muted);
  font-weight: 400;
}

.nav__list {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}
.nav__list a {
  position: relative;
  padding: 0.4rem 0;
  color: var(--color-text-muted);
  transition: color var(--duration-fast) var(--ease-smooth);
}
.nav__list a:hover,
.nav__list a[aria-current="page"] {
  color: var(--color-text-primary);
}
.nav__list a[aria-current="page"]::after {
  content: '';
  position: absolute;
  inset: auto 0 -2px 0;
  height: 1px;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
}

.nav__cta {
  padding: 0.7rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--color-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  transition:
    border-color var(--duration-fast) var(--ease-smooth),
    color var(--duration-fast) var(--ease-smooth),
    box-shadow var(--duration-fast) var(--ease-smooth);
}
.nav__cta:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-soft);
  box-shadow: var(--shadow-glow-accent);
}

@media (max-width: 720px) {
  .nav__list { display: none; }
}

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.6rem;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border-radius: 999px;
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-out),
    box-shadow var(--duration-med) var(--ease-out),
    background var(--duration-fast) var(--ease-out),
    color var(--duration-fast) var(--ease-out);
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--color-accent);
  color: #000;
  box-shadow: 0 0 0 rgba(30, 144, 255, 0);
}
.btn--primary:hover {
  background: var(--color-accent-soft);
  box-shadow: var(--shadow-glow-accent);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-primary);
  border: 1px solid rgba(255, 255, 255, 0.18);
}
.btn--ghost:hover {
  border-color: var(--color-text-chrome);
  background: rgba(255, 255, 255, 0.04);
}

/* ---------- FOOTER (Minimal Placeholder) ---------- */
.site-footer {
  padding: var(--space-md) 0;
  border-top: var(--border-glass);
  background: var(--color-bg-deep);
}
.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-pad);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}
.site-footer__legal {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  margin: 0;
  padding: 0;
}
.site-footer__legal a:hover { color: var(--color-text-primary); }

/* Placeholder Section (only for current step) */
.placeholder {
  min-height: 40vh;
  display: grid;
  place-items: center;
  padding: var(--space-xl) var(--container-pad);
  color: var(--color-text-muted);
  font-style: italic;
}