/* Gemeinsame Tokens und Grundlagen fuer App und Anmeldung. */
:root {
  --bg-deep: oklch(11% 0.035 265);
  --bg: oklch(16% 0.045 264);
  --surface: oklch(24% 0.06 262 / 0.5);
  --surface-solid: oklch(20% 0.05 263);
  --line: oklch(65% 0.2 255 / 0.24);
  --line-strong: oklch(65% 0.2 255 / 0.55);
  --blue: oklch(65% 0.2 255);
  --blue-bright: oklch(76% 0.15 250);
  --cyan: oklch(86% 0.12 205);
  --ink: oklch(96% 0.012 250);
  --ink-dim: oklch(78% 0.04 255);
  --danger: oklch(76% 0.15 22);
  --amber: oklch(85% 0.13 85);
  --ok: oklch(82% 0.15 165);

  --font-text: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-hud: ui-monospace, 'SF Mono', 'Cascadia Mono', 'JetBrains Mono', Menlo, Consolas, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.25rem;
  --text-xl: clamp(1.5rem, 1.2rem + 1.4vw, 2.1rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2.25rem;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --touch: 44px;

  --duration-fast: 150ms;
  --duration-normal: 320ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

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

[hidden] {
  display: none !important;
}

html {
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100dvh;
  background-color: var(--bg-deep);
  background-image:
    radial-gradient(120% 90% at 50% 38%, oklch(30% 0.12 258 / 0.55) 0%, transparent 62%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-deep) 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: var(--font-text);
  font-size: var(--text-base);
  line-height: 1.5;
}

h1,
h2,
p,
ul,
ol {
  margin: 0;
}

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

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Knoepfe */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--touch);
  padding: 0 var(--space-4);
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  background: none;
  font-family: var(--font-hud);
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  cursor: pointer;
  transition:
    transform var(--duration-fast) var(--ease-out),
    opacity var(--duration-fast) linear,
    filter var(--duration-fast) linear;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.btn-quiet {
  color: var(--ink-dim);
  border-color: transparent;
}

.btn-quiet:hover {
  color: var(--ink);
  border-color: var(--line);
}

.btn-ghost {
  color: var(--ink);
  border-color: var(--line-strong);
  background: oklch(24% 0.06 262 / 0.4);
}

.btn-ghost:hover {
  filter: brightness(1.25);
}

.btn-talk {
  position: relative;
  min-height: 56px;
  padding: 0 var(--space-6);
  color: oklch(14% 0.05 262);
  font-size: var(--text-base);
  font-weight: 650;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--blue-bright) 100%);
  box-shadow:
    0 0 0 1px oklch(92% 0.08 210 / 0.6) inset,
    0 10px 34px -8px oklch(65% 0.2 255 / 0.8);
}

.btn-talk:hover {
  filter: brightness(1.08);
}

.btn-talk[aria-pressed='true'] {
  color: var(--ink);
  background: oklch(24% 0.06 262 / 0.6);
  box-shadow:
    0 0 0 1px var(--danger) inset,
    0 10px 34px -12px oklch(76% 0.15 22 / 0.7);
}

/* Logo: Geometrie unveraendert, nur Farbe und Leuchten per CSS. */
.logo {
  display: block;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.logo-lines {
  stroke: var(--blue-bright);
}

.logo-lines circle {
  fill: var(--blue-bright);
  stroke: none;
}

.logo-cross {
  stroke: var(--cyan);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}