/* ========== GLOBAL STYLES ========== */
:root {
    --bg: #f8f9fa;
    --text: #111;
    --accent: #4a90e2;
    --padding: 80px;
    --grid-gap: 24px;
}

/* ---------- Variablen & Theme ---------- */
:root{
    --bg:#0e0f12; --text:#f4f6f8;
    --pad: clamp(16px, 6vw, 80px);
    --gap: 24px;
    --h1: clamp(28px, 4.8vw, 64px);
    --h2: clamp(20px, 3vw, 28px);
    --font-headline:"Inter",system-ui,sans-serif;
    --font-body:"Inter",system-ui,sans-serif;
  }

  :root {
    --font-sans: "Inter", system-ui, sans-serif;
  }
  

body {
    font-family: var(--font-sans);
    background-color: var(--bg);
    color: var(--text);
    margin: 0;
    padding: 30px;
    line-height: 1.6;
}


/* Container für Scroll-Stories */
.story-container {
    display: flex;
    flex-direction: column;
    scroll-snap-type: y proximity;
    scroll-behavior: smooth;
}
/* ----- TOP NAVIGATION ------------------------------------- */
/*.top-nav{background:var(--bg);color:var(--text);transition:background-color .4s ease,color .4s ease;}
.top-nav.theme-dark{--bg:#2c2927;--text:#f8f9fa;}
.top-nav.theme-light{--bg:#f1efeb;;--text:#111;} */

.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%; 
    height: 30px;
    background: rgb(255, 255, 255);
  
    display: grid;
    grid-template-columns: repeat(12, 1fr);
  /*  display: flex;
    align-items: center;
    justify-content: space-between; */
    align-items: center;
    padding: 0 var(--padding);
    z-index: 9999;
  }
  
  
  .nav-logo {
    font-family: var(--font-sans);
    font-size: 1.2rem;
    font-weight: bold;
    grid-column: 1/ 5;
    padding-left: 30px;
  }
  
  .nav-links {
    grid-column: 8  / 12;
    display: flex;
    justify-content: right;  
  }
  
  
  .nav-links a {
    font-family: var(--font-sans);  
    margin-left: 30px;
    text-decoration: none;
    font-size: 0.9rem;
    color: #333;
    transition: color 0.2s;
  }
  
  .nav-links a:hover {
    color: #000;
    font-weight: 600;
  }
  
  .nav-links a.active {
    font-weight: bold;
    /* border-bottom: 2px solid black; */
  }
  
  
  main.story-container {
    margin-top: 45px; /* Platz für die feste Navigation */
  }
   /* --------*/ 
  
/* ======================================================
   HEADER / TOP NAV
   ====================================================== */

   .top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
  
    /* display: flex; */
    justify-content: space-between;
    align-items: center;
  
    padding: 12px var(--pad);
    z-index: 1000;
  
    background: transparent;
    color: var(--text);
  
    transition:
      color 0.4s ease,
      border-color 0.4s ease,
      background-color 0.4s ease,
      opacity 0.4s ease;
  }

  .top-nav,
.top-nav a,
.top-nav .nav-logo {
  color: currentColor;
  text-decoration: none;
  font-family: "Inter", system-ui, sans-serif;
 /* font-size: 0.8rem; */
}

.top-nav a {
  opacity: 0.65;
}

.top-nav a:hover {
  opacity: 1;
}

body.theme-light .top-nav {
  background: rgba(246,244,242,0.9);
}

body.theme-dark .top-nav a {
  opacity: 0.55;
}
body.theme-dark .top-nav a:hover {
  opacity: 0.9;
}

/*--------- Header Border ---------*/

/* Standard (light) */
body.theme-light .top-nav {
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

/* Dark Theme */
body.theme-dark .top-nav {
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

/* ======================================================
   HEADER TEXT – STABIL BEIM THEMEWECHSEL
   ====================================================== */

   .nav-logo {
    position: relative;
    font-weight: 500;
    letter-spacing: -0.01em;
    height: 1.2em;              /* reserviert exakt eine Zeile */
    display: flex;
    align-items: center;
    padding-left: 30px;
  }
  
  /* Originaltext: bleibt im DOM, aber komplett aus dem Flow */
  .nav-logo .logo-text {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
  }
  
  
  
  /* LIGHT */
  body.theme-light .nav-logo::after {
    content: "Die Bahn in Zahlen. ungeschönt.";
  }
  
  /* DARK */
  body.theme-dark .nav-logo::after {
    content: "Zwischen Wahrheit und Verzerrung";
  }

/* ========== GRID LAYOUT PRO SEGMENT ========== */
.story-segment {
    align-items: center;
    min-height: 100vh;
    padding: 0 var(--padding);
    scroll-snap-align: start;


}

.story-zwischensegment {
    align-items: center;
    min-height: 50vh;
    padding: 0 var(--padding);
    scroll-snap-align: start;

  /*  background-image:
        linear-gradient(to right, rgba(0,0,0,0.05) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(0,0,0,0.05) 1px, transparent 1px); 
    background-size: 80px 80px; */
} 

.segment-content {
    display: grid;
    /* grid-template-rows: 1fr 1fr 1fr 1fr 1fr 1fr auto; */
    grid-template-columns: repeat(12, 1fr);
    height: 95%;
    gap: var(--grid-gap);

    align-items: stretch;
    justify-items: stretch;
}

/* Verhindert Layout-Probleme */
.segment-content > * {
    min-width: 0;
    min-height: 0;
}

/* ========== TEXT UND VISUALISIERUNGEN ========== */
.text-block {
    grid-column: 1 / 4;
    grid-row: 1 / 2;
    padding-top: 20px;
}

.visualization-container {
    grid-column: 4 / 13;
    grid-row: 2 / 7;
}

.visualization {
    width: 100%;
    min-height: 400px;
    border-radius: 12px;
 /*   box-shadow: 0 2px 20px rgba(0,0,0,0.05); */
    padding: 5px;
}

.image-container {
    grid-column: 1 / 13;
    grid-row: 2 / 4;
}

.Quelle {
    font-family: var(--font-headline);
    font-size: x-small;
    grid-column: 8 / 13;
    grid-row: 5;
  /*  margin-top: 40px; */
    padding-bottom: 20px;
    justify-self: end;
    float: right;
}

.Definition {
    grid-column: 1 / 2;
    grid-row: 3 / 4;
}

.Hervorhebung {
    font-family: var(--font-headline);
    font-size: clamp(2rem, 4vw, 6rem);
    font-weight: 500;
    letter-spacing: -0.0em;
    color: #111;
    line-height: 1.1;
    margin-bottom: 1rem;
}

/* ========= Textmodule ========= */
.text-modul-1 {
    grid-column: 1 / 7;
    grid-row: 2 / 3;
    align-self: end;
}

.text-modul-2 {
    grid-column: 1 / 7;
    grid-row: 3 / 4;
}

.text-modul-3 {
    grid-column: 2 / 4;
    grid-row: 3 / 4;
}

.text-modul-4 {
    grid-column: 3 / 4;
    grid-row: 4 / 5;
}

.zwischentext-block {
    grid-column: 2 / 10;
    grid-row: 2 / 4;
}

/* TEXT INNERHALB DER DATENVISUALISIERUNGEN */
svg text {
  font-family: "Inter", system-ui, sans-serif;

    font-size: 14px;
}

/* ========= TYPOGRAFIE ========= */

@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;700&display=swap');


h1 {
    font-family: var(--font-headline);
    font-weight: 500;
    font-size: clamp(1rem, 3.5vw, 3rem);
    color: #111;
    line-height: 1.1;
    margin-bottom: 1rem;
}

h2, h4 {
    font-family: var(--font-headline);
    font-weight: 500;
    font-size: clamp(1rem, 2.5vw, 2rem);
    color: #111;
    line-height: 1.1;
    margin-bottom: 1rem;
}

/* p, li, span {
    font-family: "Inter", sans-serif;
    font-weight: 400;
    line-height: 1.6;
    color: #333;
} */

/* ========= STORY 1 / Kampagnenintro ========= */

.page-title {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(6rem, 12vw, 12rem);
    line-height: 1.1;
    margin-bottom: 2rem;
}

.page-subtitle {
    font-family: var(--font-headline);
    font-weight: 400;
    font-size: clamp(2rem, 4vw, 6rem);
    line-height: 1.1;
    margin-bottom: 2rem;
}

/* ========== Fade-Effekte für Scrollama (NEU) ========== */
.fade-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Für Staggering-Effekte (optional) */
.stagger-child {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-child.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ========== Parallax-Unterstützung (optional) ========== */
.parallax {
    transform: translateY(var(--parallax-offset, 0));
    transition: transform 0.1s linear;
}

/* FOOTER 
footer {
    padding: 20px;
    background-color: #f5f5f5;
    text-align: center;
    border-top: 1px solid #ddd;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    margin: 0;
    font-weight: bold;
}
*/
 
 /* Damit der Container die floating elements richtig umschließt */
 .chat::after {
 content: "";
 display: table;
 clear: both;
 }
 
 /* CSS für Stagger verfeinern */
 .fade-element { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease, transition-delay .2s; }
.fade-element.visible { opacity: 1; transform: translateY(0); }


/* CHart 1 */
/* Segment 3: 2-spaltiges Layout */
.segment3-grid {
    grid-template-rows: auto auto 1fr;
    align-items: start;
  }
  
  /* Linke Steps-Spalte (läuft) */
  .segment3-steps {
    grid-column: 1 / 4;
    grid-row: 1 / span 3;
    display: flex;
    flex-direction: column;
  }
  
  /* Einzelner Step */
  .segment3-steps .step h2 { margin-bottom: .5rem; }
  
  /* Rechte Sticky-Chart-Spalte */
  .segment3-sticky {
    grid-column: 4 / 13;
    grid-row: 1 / span 3;
    position: sticky;
    top: 10vh;          /* Wo es am Viewport “klebt” */
    align-self: start;
  }
  
  .segment3-sticky .visualization {
    min-height: 500px;  /* Chart-Höhe sichtbar */
  }
  
  /* Optional: Quelle rechts unten leicht */
  #segment-3 .Quelle {
    align-self: end;
    justify-self: end;
    opacity: .7;
    font-size: 12px;
  }
  
  /* Mobile: untereinander */
  @media (max-width: 900px) {
    .segment3-grid {
      grid-template-columns: 1fr;
      grid-template-rows: auto auto;
    }
    .segment3-steps {
      grid-column: 1 / -1;
      gap: 60vh;
      padding-bottom: 80vh;
    }
    .segment3-sticky {
      grid-column: 1 / -1;
      top: 8vh;
    }
  }
  

/* ======================================================
   STORY FOOTER
   ====================================================== */

   .story-footer {
    padding: 3vh var(--pad) 2vh;
    background: transparent;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
    padding-bottom: 5vh;
    font-family: "Inter", system-ui, sans-serif;
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--text);
    opacity: 0.6;
  }
  
  /* Dark Theme */
  body.theme-dark .story-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }
  
  /* Grid */
  .footer-grid {
    max-width: 1400px;
    margin: 0 auto;
  
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: auto auto ;
    gap: 1vh;
    align-items: start;
  }
  
  /* LEFT */
  .footer-col-left1 {
    grid-column: 1 / 5;
    grid-row: 1;
  }

  .footer-col-left2 {
    grid-column: 1 / 5;
    grid-row: 2;
  }
  
  .footer-sub {
    font-size: 0.85rem;
    font-weight: 400;
    line-height: 1.5;
    opacity: 0.6;
    margin: 0;
  }

  /* left */
  .footer-col-left {
      grid-column: 5 / 9;
      grid-row: 2;
    }
    
  
  /* CENTER */
  .footer-col-center {
    grid-column: 5 / 9;
    grid-row: 2;
  }
  
  /* RIGHT */
  .footer-col-right {
    grid-column: 11 / 13;
    grid-row: 2;
  }
  
  .footer-col-right a:hover {
    opacity: 1;
  }

  .story-footer p,
.story-footer a {
  font-family: "Inter", system-ui, sans-serif;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--text);
  text-decoration: none;
}

  /* ======================================================
     MOBILE
     ====================================================== */
  
  @media (max-width: 900px) {
    .footer-grid {
      grid-template-columns: 1fr;
    }
  
    .footer-col-left,
    .footer-col-center,
    .footer-col-right {
      grid-column: 1;
    }
  
    .footer-col-right {
      align-items: flex-start;
      margin-top: 3vh;
    }
  }


  /*  BOXEN UM ZU SEHEN; WAS AUS DEM GRID AUSBRICHT 
  .visualization-container { outline: 2px solid red; }
  .visualization { outline: 2px solid blue; } */


  /* ======================================================
   Übergreifend
====================================================== */

h3 {
  font-size: clamp(1.0rem, 1.4vw, 1.8rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -0.0em;
  margin-top: 0;
  margin-bottom: 0.75rem;
  opacity: 0.85;
 
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.8rem);
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.00em;
  opacity: 0.85;
  margin-top: 0;
  margin-bottom: 0.75rem;

}

 h1 {
  font-size: clamp(1.5rem, 2.4vw, 2.8rem);
  font-weight: 500;
  line-height: 1.10;
  letter-spacing: -0.0em;
  margin-top: 0;
  margin-bottom: 0.5rem;
  opacity: 0.85;

}

.segment-number {
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  opacity: 0.5;
  margin-bottom: 0.4rem;

}

p {
  font-weight: 350;
  font-size: 0.9rem;
  line-height: 1.3;
  opacity: 0.65;
  max-width: 35ch;
  opacity: 0.65;

}

/* unter dem Chart titel */
.subtitel {
  margin-top: 0px;
  margin-bottom: 10px;
}

/* .story-segment .step > p:first-of-type {
  font-size: 0.85rem;
  opacity: 0.65;
  margin-bottom: 1.4rem;
} */


/* Toggles chart 6  --------- */ 
.chart-toggle-row{
  display:flex;
  gap:8px;
  align-items:center;
  flex-wrap:nowrap;
  width:100%;
  margin-top:50px;
  margin-left: 70px;

  /* Stabilität gegen Springen */
  min-height:34px;
}

.chart-toggle-btn{
  font-family: Inter, system-ui, sans-serif;
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(0,0,0,0.15);
  background: rgb(255, 255, 255);
  cursor: pointer;
  opacity: 0.9;
  white-space: nowrap;
  transition: background 0.15s ease, opacity 0.15s ease, border-color 0.15s ease;
}

.chart-toggle-btn:hover{
  opacity: 1;
  background: rgba(0,0,0,0.03);
}

.chart-toggle-btn--secondary{
  opacity: 0.75;
}

.chart-toggle-btn.is-active{
  background: rgba(0,0,0,0.08);
  border-color: rgba(0,0,0,0.25);
  opacity: 1;
}