/* ==========================================================================
   Entwurf 10 - Verlauf. Ein Fortschrittsbalken zeigt, wie weit man ist.
   Die Ueberschrift enthuellt sich zeilenweise, Zahlen laufen hoch.
   Wo der Browser Scroll-Zeitachsen kennt, laeuft der Balken flüssig mit,
   sonst springt er von Abschnitt zu Abschnitt. Beides ohne Fremdcode.
   Layout unabhaengig vom Brandkit.
   ========================================================================== */
:root { --maxw: 1120px; --takt: clamp(4.5rem, 8vw, 7rem); }

.js-scroll [data-auftritt] { opacity: 0; transform: translateY(22px); }
.js-scroll [data-auftritt].ist-da {
  opacity: 1; transform: none;
  transition: opacity .65s cubic-bezier(.16,1,.3,1) var(--verzug, 0ms),
              transform .65s cubic-bezier(.16,1,.3,1) var(--verzug, 0ms);
}

/* --- Fortschrittsbalken ---------------------------------------------------- */
.fortschrittsleiste { position: fixed; inset-block-start: 0; inset-inline: 0; height: 3px; z-index: 70; background: transparent; }
.fortschrittsleiste span { display: block; height: 100%; width: 0; background: var(--accent); transition: width .3s ease; transform-origin: 0 50%; }
@supports (animation-timeline: scroll()) {
  .fortschrittsleiste span.nutzt-scrollzeitachse {
    width: 100%; transform: scaleX(0); transition: none;
    animation: balken linear both; animation-timeline: scroll(root block);
  }
  @keyframes balken { to { transform: scaleX(1); } }
}
@media (prefers-reduced-motion: reduce) { .fortschrittsleiste { display: none; } }

/* --- Kopf ---------------------------------------------------------------- */
.kopf { position: sticky; top: 3px; z-index: 60; background: color-mix(in srgb, var(--bg) 92%, transparent); backdrop-filter: blur(14px); }
.kopf__reihe { display: flex; align-items: center; gap: 2rem; height: 70px; }
.hauptnav { margin-inline-start: auto; }
.hauptnav ul { display: flex; gap: 1.6rem; }
.hauptnav a { text-decoration: none; font-size: .9375rem; color: var(--text-muted); white-space: nowrap; padding-bottom: .2rem; border-bottom: 2px solid transparent; }
.hauptnav a:hover, .hauptnav a.ist-aktiv { color: var(--accent-text); border-bottom-color: var(--accent); }
@media (max-width: 860px) { .hauptnav { display: none; } }

.knopf {
  display: inline-flex; align-items: center; gap: .5rem; justify-content: center;
  padding: .8rem 1.4rem; border-radius: var(--r-pill); border: 1px solid transparent;
  font-weight: 650; font-size: .9375rem; text-decoration: none; cursor: pointer; white-space: nowrap;
  transition: background-color .16s ease, transform .12s ease, border-color .16s ease;
}
.knopf--voll { background: var(--accent); color: var(--on-accent); }
.knopf--voll:hover { background: var(--accent-hover); }
.knopf--linie { background: transparent; color: var(--text); border-color: var(--border); }
.knopf--linie:hover { border-color: var(--accent); color: var(--accent-text); }
.knopf--hell { background: var(--on-inverse); color: var(--inverse); }
.knopf--hell:hover { background: var(--accent); color: var(--on-accent); }
.knopf:active { transform: translateY(1px); }
.knopf--klein { padding: .55rem 1rem; font-size: .875rem; }

/* --- Auftakt mit zeilenweiser Enthuellung --------------------------------- */
.auftakt { padding-block: clamp(4rem, 9vw, 7rem) clamp(3rem, 6vw, 5rem); }
.auftakt__marke { display: inline-block; font-family: var(--font-mono); font-size: .75rem; text-transform: uppercase; letter-spacing: .14em; color: var(--accent-text); margin-bottom: 1.3rem; }
.auftakt h1 { font-size: clamp(2.2rem, 5.2vw, 3.9rem); font-weight: var(--display-weight); line-height: 1.1; max-width: 19ch; margin-bottom: 1.4rem; text-transform: var(--display-transform); }
.auftakt h1 .zeile { display: block; overflow: hidden; }
.auftakt h1 .zeile span { display: block; }
.js-scroll .auftakt h1 .zeile span { transform: translateY(105%); animation: aufsteigen .8s cubic-bezier(.16,1,.3,1) forwards; }
.js-scroll .auftakt h1 .zeile:nth-child(2) span { animation-delay: .12s; }
.js-scroll .auftakt h1 .zeile:nth-child(3) span { animation-delay: .24s; }
@keyframes aufsteigen { to { transform: translateY(0); } }
@media (prefers-reduced-motion: reduce) {
  .auftakt h1 .zeile span { transform: none !important; animation: none !important; }
}
.auftakt p { font-size: clamp(1.0625rem, 1.5vw, 1.1875rem); color: var(--text-muted); max-width: 48ch; margin-bottom: 2rem; }
.auftakt__aktionen { display: flex; flex-wrap: wrap; gap: .8rem; }

/* --- Kapitel mit Randzahl -------------------------------------------------- */
.kapitel { padding-block: var(--takt); border-top: 1px solid var(--border); }
.kapitel__raster { display: grid; grid-template-columns: 8rem 1fr; gap: clamp(1.5rem, 4vw, 3rem); align-items: start; }
.kapitel__nr { font-family: var(--font-mono); font-size: .8125rem; color: var(--accent-text); letter-spacing: .1em; padding-top: .5rem; }
.kapitel h2 { font-size: clamp(1.8rem, 3.4vw, 2.5rem); font-weight: var(--display-weight); line-height: 1.18; max-width: 22ch; margin-bottom: 1.1rem; text-transform: var(--display-transform); }
.kapitel__text { color: var(--text-muted); max-width: 56ch; font-size: 1.0625rem; }
@media (max-width: 760px) { .kapitel__raster { grid-template-columns: 1fr; gap: 1rem; } }

/* --- Kursliste mit Balken je Umfang --------------------------------------- */
.umfangsliste { margin-top: 2.5rem; }
.umfangszeile {
  display: grid; grid-template-columns: 1fr 7rem; gap: 1.5rem; align-items: center;
  padding: 1.15rem 0; border-bottom: 1px solid var(--border); text-decoration: none; color: inherit;
  transition: padding-inline-start .2s cubic-bezier(.16,1,.3,1);
}
.umfangszeile:first-child { border-top: 1px solid var(--border); }
.umfangszeile:hover { padding-inline-start: .6rem; }
.umfangszeile:hover .umfangszeile__titel { color: var(--accent-text); }
.umfangszeile__titel { font-family: var(--font-display); font-size: 1.0625rem; font-weight: 600; display: block; margin-bottom: .55rem; }
.umfangszeile__feld { font-family: var(--font-mono); font-size: .6875rem; text-transform: uppercase; letter-spacing: .1em; color: var(--text-muted); display: block; margin-bottom: .35rem; }
.balken { height: 6px; border-radius: 3px; background: var(--bg-alt); overflow: hidden; }
.balken i { display: block; height: 100%; background: var(--accent); width: 0; border-radius: 3px; transition: width 1s cubic-bezier(.16,1,.3,1) var(--verzug, 0ms); }
.ist-da .balken i, .umfangszeile.ist-da .balken i { width: var(--anteil, 50%); }
.js-scroll .balken i { width: 0; }
.js-scroll .ist-da .balken i { width: var(--anteil, 50%); }
@media (prefers-reduced-motion: reduce) { .balken i { width: var(--anteil, 50%) !important; transition: none; } }
.umfangszeile__mass { font-family: var(--font-mono); font-size: .875rem; color: var(--text-muted); text-align: right; font-variant-numeric: tabular-nums; }
@media (max-width: 620px) { .umfangszeile { grid-template-columns: 1fr; gap: .5rem; } .umfangszeile__mass { text-align: left; } }

/* --- Zahlen, die hochlaufen ------------------------------------------------ */
.zahlenband { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2.5rem; padding-block: clamp(2.5rem, 5vw, 3.5rem); }
.zahl b { display: block; font-family: var(--font-mono); font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 400; letter-spacing: -0.045em; line-height: 1; margin-bottom: .5rem; font-variant-numeric: tabular-nums; }
.zahl span { font-size: .9375rem; color: var(--text-muted); }
@media (max-width: 760px) { .zahlenband { grid-template-columns: 1fr; gap: 1.75rem; } }

/* --- Abschluss ----------------------------------------------------------- */
.abschluss { padding-block: var(--takt); border-top: 1px solid var(--border); display: grid; grid-template-columns: 1fr auto; gap: 2.5rem; align-items: center; }
.abschluss h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: var(--display-weight); margin-bottom: .8rem; max-width: 18ch; text-transform: var(--display-transform); }
.abschluss p { color: var(--text-muted); max-width: 48ch; }
@media (max-width: 800px) { .abschluss { grid-template-columns: 1fr; } }

/* --- Fuss ---------------------------------------------------------------- */
.fuss { border-top: 1px solid var(--border); padding-block: 3rem 2.25rem; font-size: .9375rem; }
.fuss__raster { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 2.5rem; }
.fuss h3 { font-size: .8125rem; text-transform: uppercase; letter-spacing: .08em; color: var(--text-muted); margin-bottom: 1rem; font-weight: 650; }
.fuss li { margin-bottom: .5rem; }
.fuss a { text-decoration: none; color: var(--text-muted); }
.fuss a:hover { color: var(--accent-text); }
.fuss__zertifikat { font-size: .8125rem; color: var(--text-muted); line-height: 1.6; max-width: 44ch; margin-top: 1rem; }
.fuss__unten { margin-top: 2.5rem; padding-top: 1.25rem; border-top: 1px solid var(--border); display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; font-size: .8125rem; color: var(--text-muted); }
@media (max-width: 720px) { .fuss__raster { grid-template-columns: 1fr; } }