/* ============================================
   Leserhilfswerk – Main Stylesheet
   Design-Tokens + Basis. Komponenten: components.css
   ============================================ */

/* --- Fonts (self-hosted, DSGVO: kein Google-CDN) --- */
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/oswald-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/oswald-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../fonts/oswald-600.woff2') format('woff2');
}
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/oswald-700.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../fonts/inter-400.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../fonts/inter-500.woff2') format('woff2');
}
@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../fonts/inter-700.woff2') format('woff2');
}

/* --- Custom Properties --- */
:root {
  /* Farbwelt: Marineblau + Azzurro (Logo-Blauton, Stadion-Look) */
  --color-primary:       #073E5A;   /* Marineblau */
  --color-primary-light: #136086;
  --color-primary-deep:  #03283A;
  --color-accent:        #37AFE6;   /* Azzurro – Akzent */
  --color-accent-dark:   #0D72A0;   /* für Text/Labels auf hellem Grund */
  --color-bg:            #F4F6F8;   /* Kühles Weiß */
  --color-mid:           #3C4650;   /* Fließtext */
  --color-white:         #FFFFFF;
  --color-border:        #E1E5EA;
  --color-hairline:      rgba(7, 62, 90, 0.18);
  --color-success:       #2E7D32;
  --color-error:         #C62828;

  /* Typografie */
  --font-head: 'Oswald', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-xs:  0.75rem;
  --font-size-sm:  0.875rem;
  --font-size-base: 1rem;
  --font-size-lg:  1.125rem;
  --font-size-xl:  1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.625rem;
  --font-size-5xl: 3.375rem;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Layout – scharfe Kanten, klare Linien (Stadion-/Editorial-Look) */
  --container-max: 1200px;
  --container-narrow: 800px;
  --border-radius: 0;
  --border-radius-lg: 0;
  --shadow-soft: 0 4px 32px rgba(7, 62, 90, 0.16);

  /* Glas-Effekt (Fallback-Farbe ohne backdrop-filter in den Komponenten) */
  --glass-dark:  rgba(3, 40, 58, 0.86);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* --- Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: 1.65;
  color: var(--color-mid);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover { color: var(--color-accent-dark); }

ul, ol { list-style: none; }

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

input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Typografie --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-primary);
}

h1, h2 { text-transform: uppercase; letter-spacing: 0.01em; text-wrap: balance; }
h1 { font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-5xl)); }
h2 { font-size: clamp(var(--font-size-2xl), 3.5vw, var(--font-size-4xl)); }
h3 { font-size: var(--font-size-xl); font-weight: 600; }
h4 { font-size: var(--font-size-lg); font-weight: 600; }

/* Azzurro-Kicker über Überschriften (Markenmoment) */
.kicker {
  display: block;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--font-size-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: var(--space-sm);
}

/* --- Layout-Basis --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container--narrow { max-width: var(--container-narrow); }

.section { padding: var(--space-3xl) 0; }
.section--spacious { padding: var(--space-4xl) 0; }
.section--dark {
  background: var(--color-primary);
  color: rgba(244, 246, 248, 0.85);
}
.section--dark h2, .section--dark h3 { color: var(--color-bg); }
.section--white { background: var(--color-white); }

/* Feine Haarlinie als Trenner statt Schatten */
.hairline { border: 0; border-top: 1px solid var(--color-hairline); }

.grid { display: grid; gap: var(--space-xl); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; }
  .section { padding: var(--space-2xl) 0; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.8em 1.9em;
  border-radius: var(--border-radius);
  border: 1px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  min-height: 44px; /* Touch-Ziel */
}

.btn--primary {
  background: var(--color-accent-dark);
  color: var(--color-white);
  border-color: var(--color-accent-dark);
}
.btn--primary:hover { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-white); }

.btn--dark {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn--dark:hover { background: var(--color-primary-light); border-color: var(--color-primary-light); color: var(--color-white); }

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn--outline:hover { background: var(--color-primary); border-color: var(--color-primary); color: var(--color-white); }

.btn--outline-light {
  background: transparent;
  color: var(--color-white);
  border: 1px solid rgba(255, 255, 255, 0.55);
}
.btn--outline-light:hover { background: var(--color-white); border-color: var(--color-white); color: var(--color-primary-deep); }

.btn--sm { font-size: var(--font-size-sm); padding: 0.6em 1.3em; }

/* --- Barrierefreiheit --- */
.skip-link {
  position: absolute;
  top: -50px;
  left: var(--space-md);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  z-index: 1001;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-md); color: var(--color-white); }

:focus-visible {
  outline: 2px solid var(--color-accent-dark);
  outline-offset: 2px;
}

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

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