/*
|--------------------------------------------------------------------------
| IRF Glass Ocean Design System
|--------------------------------------------------------------------------
| Datei: irf-core.css
| Version: 1.1.0
| Projekt: Inselradio Föhr
|--------------------------------------------------------------------------
*/

/* =========================================================
   1. ZENTRALE DESIGN-VARIABLEN
   ========================================================= */

:root {
  /* Markenfarben */
  --irf-dark-blue: #003a5d;
  --irf-deep-blue: #004f73;
  --irf-blue: #006b91;
  --irf-turquoise: #10a9b7;
  --irf-light-turquoise: #70d6d2;
  --irf-yellow: #ffd447;
  
  /* =========================================================
   SEMANTISCHE DESIGN-TOKENS
   ========================================================= */

--irf-color-primary: var(--irf-dark-blue);
--irf-color-secondary: var(--irf-blue);
--irf-color-accent: var(--irf-turquoise);
--irf-color-highlight: var(--irf-yellow);

--irf-text-default: var(--irf-dark-text);
--irf-text-inverse: var(--irf-white);

--irf-surface-primary: var(--irf-white);
--irf-surface-secondary: var(--irf-off-white);

--irf-border-default: var(--irf-light-gray);

  /* Neutrale Farben */
  --irf-white: #ffffff;
  --irf-off-white: #f6fbfc;
  --irf-light-gray: #e6f1f4;
  --irf-gray: #708995;
  --irf-dark-text: #17394b;
  --irf-black: #071b26;

  /* Transparente Flächen */
  --irf-glass-light: rgba(255, 255, 255, 0.18);
  --irf-glass-medium: rgba(255, 255, 255, 0.12);
  --irf-glass-dark: rgba(0, 58, 93, 0.28);
  --irf-glass-border: rgba(255, 255, 255, 0.28);

  /* Hintergründe */
  --irf-gradient-ocean:
    linear-gradient(
      135deg,
      var(--irf-dark-blue) 0%,
      var(--irf-blue) 52%,
      var(--irf-turquoise) 100%
    );

  --irf-gradient-ocean-deep:
    linear-gradient(
      145deg,
      #002d49 0%,
      var(--irf-dark-blue) 45%,
      var(--irf-blue) 100%
    );

  --irf-gradient-sun:
    linear-gradient(
      135deg,
      var(--irf-yellow),
      #ffe986
    );

  --irf-gradient-glass:
    linear-gradient(
      135deg,
      rgba(255, 255, 255, 0.22),
      rgba(255, 255, 255, 0.07)
    );

  /* Rundungen */
  --irf-radius-small: 12px;
  --irf-radius-medium: 18px;
  --irf-radius-large: 24px;
  --irf-radius-xlarge: 30px;
  --irf-radius-round: 999px;
  
  /* Hero */
	--irf-radius-hero: 48px;

  /* Schatten */
  --irf-shadow-small:
    0 8px 20px rgba(0, 58, 93, 0.12);

  --irf-shadow-medium:
    0 16px 38px rgba(0, 58, 93, 0.18);

  --irf-shadow-large:
    0 24px 60px rgba(0, 40, 65, 0.24);

  --irf-shadow-glow:
    0 0 40px rgba(112, 214, 210, 0.22);

  /* Abstände */
  --irf-space-1: 4px;
  --irf-space-2: 8px;
  --irf-space-3: 12px;
  --irf-space-4: 16px;
  --irf-space-5: 20px;
  --irf-space-6: 24px;
  --irf-space-7: 32px;
  --irf-space-8: 40px;
  --irf-space-9: 48px;
  --irf-space-10: 64px;
  
  /* Standard-Abstände */
	--irf-section-space: 96px;
	--irf-section-space-mobile: 64px;

  /* Typografie */
  --irf-font-family:
    Inter,
    "Segoe UI",
    Arial,
    Helvetica,
    sans-serif;

  --irf-font-size-small: 0.875rem;
  --irf-font-size-base: 1rem;
  --irf-font-size-medium: 1.125rem;
  --irf-font-size-large: 1.375rem;
  --irf-font-size-xlarge: 1.75rem;
  --irf-font-size-hero: clamp(2rem, 5vw, 4rem);

  --irf-line-height-tight: 1.15;
  --irf-line-height-normal: 1.55;
  --irf-line-height-relaxed: 1.75;

  /* Übergänge */
  --irf-transition-fast: 0.2s ease;
  --irf-transition-normal: 0.35s ease;
  --irf-transition-slow: 0.7s ease;

  /* Glas-Effekt */
  --irf-blur-small: blur(10px);
  --irf-blur-medium: blur(18px);
  --irf-blur-large: blur(28px);

  /* Inhaltsbreiten */
  --irf-content-small: 760px;
  --irf-content-medium: 960px;
  --irf-content-large: 1100px;
  --irf-content-wide: 1280px;
  --irf-content-full: 100%;

  /* Z-Index-System */
  --irf-z-base: 0;
  --irf-z-raised: 10;
  --irf-z-sticky: 100;
  --irf-z-header: 200;
  --irf-z-dropdown: 300;
  --irf-z-overlay: 400;
  --irf-z-modal: 500;
  --irf-z-toast: 600;
  --irf-z-tooltip: 700;

  /* Icon-Größen */
  --irf-icon-xs: 14px;
  --irf-icon-sm: 18px;
  --irf-icon-md: 24px;
  --irf-icon-lg: 32px;
  --irf-icon-xl: 48px;

  /* Standard-Animationsdauern */
  --irf-duration-instant: 0ms;
  --irf-duration-fast: 160ms;
  --irf-duration-normal: 280ms;
  --irf-duration-slow: 520ms;
  --irf-duration-slower: 800ms;

  /* Standard-Easing */
  --irf-ease-standard: ease;
  --irf-ease-enter: cubic-bezier(0.22, 1, 0.36, 1);
  --irf-ease-exit: cubic-bezier(0.4, 0, 1, 1);
  --irf-ease-emphasized: cubic-bezier(0.2, 0.7, 0.2, 1);

  /* Fokus */
  --irf-focus-color: var(--irf-yellow);
  --irf-focus-ring: 0 0 0 4px rgba(255, 212, 71, 0.34);
  --irf-focus-offset: 3px;

  /* Dokumentierte Breakpoints
     Hinweis: CSS-Variablen können nicht direkt in @media-Abfragen
     verwendet werden. Die Werte dienen als zentrale Referenz. */
  --irf-breakpoint-mobile: 480px;
  --irf-breakpoint-small: 560px;
  --irf-breakpoint-tablet: 720px;
  --irf-breakpoint-desktop: 900px;
  --irf-breakpoint-wide: 1280px;

}
/* =========================================================
   BASIS
   ========================================================= */

html {
  scroll-behavior: smooth;
}

/* =========================================================
   2. BASIS-RESET INNERHALB DES IRF-SYSTEMS
   ========================================================= */

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

.irf-ui {
  position: relative;
  width: 100%;
  color: var(--irf-dark-text);
  font-family: var(--irf-font-family);
  line-height: var(--irf-line-height-normal);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.irf-ui img,
.irf-ui svg,
.irf-ui video {
  display: block;
  max-width: 100%;
}

.irf-ui button,
.irf-ui input,
.irf-ui select,
.irf-ui textarea {
  font: inherit;
}

.irf-ui a {
  color: inherit;
}


/* Einheitlicher Fokus innerhalb des IRF-Systems */
.irf-ui :where(
  a,
  button,
  input,
  select,
  textarea,
  summary,
  [tabindex]:not([tabindex="-1"])
):focus-visible {
  outline: 3px solid var(--irf-focus-color);
  outline-offset: var(--irf-focus-offset);
}

.irf-ui :where(
  a,
  button,
  input,
  select,
  textarea,
  summary,
  [tabindex]:not([tabindex="-1"])
):focus:not(:focus-visible) {
  outline: none;
}


/* =========================================================
   3. TYPOGRAFIE
   ========================================================= */

.irf-title {
  margin: 0;
  color: inherit;
  font-size: var(--irf-font-size-hero);
  font-weight: 800;
  line-height: var(--irf-line-height-tight);
  letter-spacing: -0.035em;
}

.irf-heading {
  margin: 0;
  color: inherit;
  font-size: clamp(1.65rem, 3vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.025em;
}

.irf-subheading {
  margin: 0;
  color: inherit;
  font-size: var(--irf-font-size-large);
  font-weight: 750;
  line-height: 1.3;
}

.irf-text {
  margin: 0;
  font-size: var(--irf-font-size-base);
  line-height: var(--irf-line-height-relaxed);
}

.irf-text-large {
  margin: 0;
  font-size: var(--irf-font-size-medium);
  line-height: 1.7;
}

.irf-text-small {
  margin: 0;
  font-size: var(--irf-font-size-small);
  line-height: 1.55;
}

.irf-text-muted {
  color: var(--irf-gray);
}

.irf-text-white {
  color: var(--irf-white);
}

.irf-text-yellow {
  color: var(--irf-yellow);
}


/* =========================================================
   4. LAYOUT-HILFSKLASSEN
   ========================================================= */

.irf-container {
  width: min(
    calc(100% - 32px),
    var(--irf-content-large)
  );
  margin-inline: auto;
}

.irf-container-small {
  width: min(
    calc(100% - 32px),
    var(--irf-content-small)
  );
  margin-inline: auto;
}

.irf-container-wide {
  width: min(
    calc(100% - 32px),
    var(--irf-content-wide)
  );
  margin-inline: auto;
}

.irf-stack {
  display: flex;
  flex-direction: column;
  gap: var(--irf-space-6);
}

.irf-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--irf-space-4);
}

.irf-grid {
  display: grid;
  gap: var(--irf-space-6);
}

.irf-grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.irf-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.irf-center {
  text-align: center;
}



.irf-z-base { z-index: var(--irf-z-base); }
.irf-z-raised { z-index: var(--irf-z-raised); }
.irf-z-sticky { z-index: var(--irf-z-sticky); }
.irf-z-header { z-index: var(--irf-z-header); }
.irf-z-overlay { z-index: var(--irf-z-overlay); }
.irf-z-modal { z-index: var(--irf-z-modal); }
.irf-z-tooltip { z-index: var(--irf-z-tooltip); }

.irf-hidden {
  display: none !important;
}


/* =========================================================
   4A. ICON-HILFSKLASSEN
   ========================================================= */

.irf-icon {
  display: inline-grid;
  width: var(--irf-icon-md);
  height: var(--irf-icon-md);
  flex: 0 0 var(--irf-icon-md);
  place-items: center;
}

.irf-icon svg,
svg.irf-icon {
  width: 100%;
  height: 100%;
}

.irf-icon-xs {
  width: var(--irf-icon-xs);
  height: var(--irf-icon-xs);
  flex-basis: var(--irf-icon-xs);
}

.irf-icon-sm {
  width: var(--irf-icon-sm);
  height: var(--irf-icon-sm);
  flex-basis: var(--irf-icon-sm);
}

.irf-icon-md {
  width: var(--irf-icon-md);
  height: var(--irf-icon-md);
  flex-basis: var(--irf-icon-md);
}

.irf-icon-lg {
  width: var(--irf-icon-lg);
  height: var(--irf-icon-lg);
  flex-basis: var(--irf-icon-lg);
}

.irf-icon-xl {
  width: var(--irf-icon-xl);
  height: var(--irf-icon-xl);
  flex-basis: var(--irf-icon-xl);
}


/* =========================================================
   4B. ABSTANDS-HILFSKLASSEN
   Bewusst kompakt gehalten, damit kein Utility-Wildwuchs entsteht.
   ========================================================= */

.irf-mt-0 { margin-top: 0 !important; }
.irf-mt-2 { margin-top: var(--irf-space-2) !important; }
.irf-mt-4 { margin-top: var(--irf-space-4) !important; }
.irf-mt-6 { margin-top: var(--irf-space-6) !important; }
.irf-mt-8 { margin-top: var(--irf-space-8) !important; }

.irf-mb-0 { margin-bottom: 0 !important; }
.irf-mb-2 { margin-bottom: var(--irf-space-2) !important; }
.irf-mb-4 { margin-bottom: var(--irf-space-4) !important; }
.irf-mb-6 { margin-bottom: var(--irf-space-6) !important; }
.irf-mb-8 { margin-bottom: var(--irf-space-8) !important; }

.irf-p-0 { padding: 0 !important; }
.irf-p-4 { padding: var(--irf-space-4) !important; }
.irf-p-6 { padding: var(--irf-space-6) !important; }
.irf-p-8 { padding: var(--irf-space-8) !important; }

.irf-gap-2 { gap: var(--irf-space-2) !important; }
.irf-gap-4 { gap: var(--irf-space-4) !important; }
.irf-gap-6 { gap: var(--irf-space-6) !important; }
.irf-gap-8 { gap: var(--irf-space-8) !important; }


/* =========================================================
   5. GLASS-OCEAN-GRUNDFLÄCHEN
   ========================================================= */

.irf-ocean-surface {
  position: relative;
  overflow: hidden;
  border-radius: var(--irf-radius-xlarge);
  background: var(--irf-gradient-ocean);
  box-shadow: var(--irf-shadow-large);
  color: var(--irf-white);
  isolation: isolate;
}

.irf-ocean-surface::before {
  content: "";
  position: absolute;
  z-index: -2;
  top: -180px;
  right: -140px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background:
    radial-gradient(
      circle,
      rgba(255, 212, 71, 0.24) 0%,
      rgba(112, 214, 210, 0.14) 35%,
      transparent 70%
    );
  filter: blur(8px);
  pointer-events: none;
}

.irf-ocean-surface::after {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(
      115deg,
      transparent 0%,
      rgba(255, 255, 255, 0.04) 30%,
      rgba(255, 255, 255, 0.14) 48%,
      transparent 68%
    );
  transform: translateX(-130%);
  animation: irf-ocean-light 18s ease-in-out infinite;
  pointer-events: none;
}

.irf-glass {
  border: 1px solid var(--irf-glass-border);
  background: var(--irf-gradient-glass);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    var(--irf-shadow-medium);

  -webkit-backdrop-filter: var(--irf-blur-medium);
  backdrop-filter: var(--irf-blur-medium);
}

.irf-glass-light {
  border: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.1);

  -webkit-backdrop-filter: var(--irf-blur-small);
  backdrop-filter: var(--irf-blur-small);
}


/* =========================================================
   6. STANDARD-KARTEN
   ========================================================= */

.irf-card {
  position: relative;
  overflow: hidden;
  padding: var(--irf-space-7);
  border-radius: var(--irf-radius-large);
  background: var(--irf-white);
  box-shadow: var(--irf-shadow-medium);
  transition:
    transform var(--irf-transition-normal),
    box-shadow var(--irf-transition-normal);
}

.irf-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--irf-shadow-large);
}

.irf-card-glass {
  color: var(--irf-white);
  border: 1px solid var(--irf-glass-border);
  background: var(--irf-glass-light);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    var(--irf-shadow-medium);

  -webkit-backdrop-filter: var(--irf-blur-medium);
  backdrop-filter: var(--irf-blur-medium);
}


/* =========================================================
   7. BADGES
   ========================================================= */

.irf-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--irf-space-2);
  min-height: 34px;
  padding: 7px 14px;
  border-radius: var(--irf-radius-round);
  font-size: var(--irf-font-size-small);
  font-weight: 750;
  line-height: 1;
}

.irf-badge-glass {
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: rgba(255, 255, 255, 0.12);
  color: var(--irf-white);

  -webkit-backdrop-filter: var(--irf-blur-small);
  backdrop-filter: var(--irf-blur-small);
}

.irf-badge-yellow {
  background: var(--irf-yellow);
  color: var(--irf-dark-blue);
}


/* =========================================================
   8. BUTTON-GRUNDLAGE
   ========================================================= */

.irf-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 52px;
  padding: 14px 22px;
  border: 0;
  border-radius: var(--irf-radius-round);
  text-align: center;
  text-decoration: none;
  font-size: var(--irf-font-size-base);
  font-weight: 800;
  line-height: 1.2;
  cursor: pointer;
  transition:
    transform var(--irf-transition-fast),
    box-shadow var(--irf-transition-fast),
    background var(--irf-transition-fast),
    color var(--irf-transition-fast);
}

.irf-button:hover {
  transform: translateY(-2px);
}

.irf-button:active {
  transform: translateY(0);
}

.irf-button:focus-visible {
  outline: 3px solid var(--irf-focus-color);
  outline-offset: var(--irf-focus-offset);
  box-shadow: var(--irf-focus-ring);
}

.irf-button-primary {
  background: var(--irf-gradient-sun);
  color: var(--irf-dark-blue);
  box-shadow:
    0 10px 26px rgba(255, 212, 71, 0.28);
}

.irf-button-primary:hover {
  background:
    linear-gradient(
      135deg,
      #ffca1a,
      var(--irf-yellow)
    );
}

.irf-button-secondary {
  background:
    linear-gradient(
      135deg,
      var(--irf-blue),
      var(--irf-turquoise)
    );
  color: var(--irf-white);
  box-shadow:
    0 10px 26px rgba(0, 107, 145, 0.24);
}

.irf-button-secondary:hover {
  background:
    linear-gradient(
      135deg,
      var(--irf-dark-blue),
      var(--irf-blue)
    );
}

.irf-button-glass {
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.12);
  color: var(--irf-white);

  -webkit-backdrop-filter: var(--irf-blur-small);
  backdrop-filter: var(--irf-blur-small);
}

.irf-button-glass:hover {
  background: rgba(255, 255, 255, 0.2);
}

.irf-button-full {
  width: 100%;
}


/* =========================================================
   9. DEKORATIVE ELEMENTE
   ========================================================= */

.irf-ocean-glow {
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background:
    radial-gradient(
      circle,
      rgba(112, 214, 210, 0.26),
      transparent 70%
    );
  filter: blur(12px);
  pointer-events: none;
}

.irf-ocean-line {
  width: 100%;
  height: 1px;
  background:
    linear-gradient(
      90deg,
      transparent,
      rgba(255, 255, 255, 0.56),
      transparent
    );
}


/* =========================================================
   10. ANIMATIONEN
   ========================================================= */

@keyframes irf-ocean-light {
  0%,
  72% {
    transform: translateX(-130%);
    opacity: 0;
  }

  78% {
    opacity: 1;
  }

  92% {
    opacity: 0.85;
  }

  100% {
    transform: translateX(130%);
    opacity: 0;
  }
}

@keyframes irf-soft-float {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-6px);
  }
}

@keyframes irf-soft-pulse {
  0%,
  92%,
  100% {
    transform: scale(1);
  }

  96% {
    transform: scale(1.045);
  }
}

.irf-animate-float {
  animation: irf-soft-float 6s ease-in-out infinite;
}

.irf-animate-pulse {
  animation: irf-soft-pulse 8s ease-in-out infinite;
}


/* =========================================================
   11. BARRIEREFREIHEIT
   ========================================================= */

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

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


/* =========================================================
   12. RESPONSIVE GRUNDREGELN
   ========================================================= */

@media (max-width: 900px) {
  .irf-grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  :root {
    --irf-space-7: 26px;
    --irf-space-8: 32px;
    --irf-space-9: 40px;
    --irf-space-10: 48px;
  }

  .irf-grid-2,
  .irf-grid-3 {
    grid-template-columns: 1fr;
  }

  .irf-card {
    padding: var(--irf-space-6);
  }
}

@media (max-width: 480px) {
  .irf-container,
  .irf-container-small,
  .irf-container-wide {
    width: min(
      calc(100% - 24px),
      var(--irf-content-large)
    );
  }

  .irf-card,
  .irf-ocean-surface {
    border-radius: var(--irf-radius-large);
  }

  .irf-button {
    width: 100%;
    min-height: 50px;
    padding-inline: 18px;
  }
}

/* =========================================================
   13. SCROLL-EINBLENDUNGEN
   Benötigt: irf-effects.js
   ========================================================= */

.irf-reveal {
  --irf-reveal-delay: 0ms;

  opacity: 0;
  transition:
    opacity 0.75s ease var(--irf-reveal-delay),
    transform 0.75s cubic-bezier(
      0.22,
      1,
      0.36,
      1
    ) var(--irf-reveal-delay),
    filter 0.75s ease var(--irf-reveal-delay);

  will-change: opacity, transform;
}

.irf-reveal-fade {
  transform: none;
}

.irf-reveal-rise {
  transform: translateY(24px);
}

.irf-reveal-rise-small {
  transform: translateY(12px);
}

.irf-reveal-left {
  transform: translateX(-26px);
}

.irf-reveal-right {
  transform: translateX(26px);
}

.irf-reveal-scale {
  transform: scale(0.96);
}

.irf-reveal-soft {
  transform: translateY(18px) scale(0.985);
  filter: blur(3px);
}

.irf-reveal.irf-is-visible {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
  filter: blur(0);
}

@media (prefers-reduced-motion: reduce) {
  .irf-reveal {
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
    transition: none !important;
  }
}