/* ---------- Bereich: Infoseiten von www (Präfix is-) ----------
   /app/, /hilfe/app-installieren/, /friends/, /plus/, /bierdeckel-loesung-2026/,
   /edv-vorbereitung-fuer-den-start/, /technische-voraussetzungen-fuer-cloudtelefonie/,
   /anmeldung-zum-newsletter-erfolgreich/. Erzeugt von tools/seiten/infoseiten.py.
   Nutzt aus style.css: page-hero, section, section-head, checklist, steps, faq, final-cta, demo-form, btn.
   Mobile first, Breakpoints wie style.css. */

/* ---------- Seitenkopf ---------- */
/* Unter 1024 px steht Text vor dem Netz-Motiv: dezenter (wie /demoanfrage/) */
.is-hero .hero__deco { opacity: .16; }
.is-hero--solo { padding-bottom: clamp(4rem, 9vw, 7rem); }
.is-phones, .is-lock { margin: 0; }
.is-phones img { width: min(100%, 520px); margin-inline: auto; }
/* /app/: Seitenkopf-Bild der Startseite (.hero-media aus style.css), auf dem Tablet nicht breiter als am Desktop */
.page-hero__visual .is-hero-media { width: min(100%, 520px); margin-top: 1rem; }
.is-lock img { width: auto; max-height: min(420px, 70vh); margin-inline: auto; filter: drop-shadow(0 24px 30px rgba(0, 38, 80, .22)); }

/* Weiße Logos (Friends, Plus) auf der CD-Verlaufskachel */
.is-logo-tile {
  position: relative; isolation: isolate; overflow: hidden;
  width: min(100%, 520px); margin-inline: auto; padding: clamp(1.5rem, 5vw, 2.75rem);
  border-radius: var(--radius-l); background: var(--gradient-diag); box-shadow: var(--shadow-l);
}
.is-logo-tile::after {
  content: ""; position: absolute; z-index: -1; inset: 0;
  background: url("../assets/img/deco-netz-weiss.webp") center bottom / contain no-repeat; opacity: .08;
}
.is-logo-tile img { width: 100%; }

/* Hinweis an die IT (EDV, Cloudtelefonie) */
.is-note {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 1rem; align-items: start;
  width: min(100%, 440px); margin-inline: auto; padding: clamp(1.25rem, 3vw, 1.75rem);
  border-radius: var(--radius); background: var(--gradient) 0 0 / 100% 6px no-repeat, var(--tile); box-shadow: var(--shadow-l);
}
.is-note__icon, .is-callout__icon {
  display: grid; place-items: center; width: 48px; height: 48px; border-radius: 14px;
  background: var(--gradient); color: var(--white);
}
.is-note__icon .icon, .is-callout__icon .icon { width: 22px; height: 22px; }
.is-note__title { font-size: 1.1875rem; line-height: 1.3; }
.is-note p { margin-top: .4rem; color: var(--muted); font-size: 1rem; }

/* ---------- Text und Bild ---------- */
.is-text > * + * { margin-top: 1rem; }
.is-text h2 { font-size: clamp(1.625rem, 1.25rem + 1.6vw, 2.375rem); }
.is-narrow { max-width: 46rem; margin-inline: auto; text-align: center; }
.is-url { overflow-wrap: anywhere; }

.is-split { display: grid; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.is-split__media { margin: 0; }
.is-split__copy > * + * { margin-top: 1.1rem; }
.is-split__copy .section-head { margin-bottom: 0; }
.is-split--reverse .is-split__media { order: 2; }
.is-shot img { width: min(100%, 400px); margin-inline: auto; }
.is-shot--wide img { width: min(100%, 540px); border-radius: var(--radius); box-shadow: var(--shadow); }
.is-title { font-size: clamp(1.5rem, 1.2rem + 1.2vw, 2.125rem); font-weight: 900; line-height: 1.15; }
.is-title .light { display: block; margin-top: .3em; font-size: .7em; color: var(--primary); }
.is-split__copy .checklist { margin-top: 1.5rem; }
.is-split__copy .checklist li { font-weight: 700; color: var(--ink); }
.is-more { padding-top: 1.25rem; border-top: 1px solid var(--line); }
.is-more a { font-weight: 700; }

/* ---------- App installieren ---------- */
.is-download { padding-block: clamp(3rem, 7vw, 5rem); }
.is-stores { display: grid; gap: 1.25rem; }
.is-store {
  display: grid; justify-items: center; gap: .35rem; padding: clamp(1.5rem, 4vw, 2.25rem);
  border-radius: var(--radius); background: var(--tile); box-shadow: var(--shadow-s); text-align: center;
}
.is-store__title { font-size: clamp(1.5rem, 1.25rem + 1vw, 2rem); }
.is-store__sub { color: var(--muted); }
.is-store__row { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 1.25rem 1.75rem; margin-top: 1rem; }
.is-store__badge { display: block; border-radius: 8px; transition: transform .2s var(--ease); }
.is-store__badge:hover { transform: translateY(-2px); }
.is-store__badge img { width: 165px; }
.is-store__qr { width: 120px; padding: 6px; border: 1px solid var(--line); border-radius: 10px; background: var(--white); image-rendering: pixelated; }

.is-steps-intro { margin-bottom: 0; }
.steps.is-steps { margin-top: 1rem; }

.is-callout {
  display: grid; gap: 1.25rem; max-width: 60rem; margin-inline: auto; padding: clamp(1.5rem, 4vw, 2.75rem);
  border-radius: var(--radius); background: var(--tile); box-shadow: var(--shadow);
}

/* ---------- Friends: drei Level ---------- */
.is-levels { display: grid; gap: 1.25rem; }
.is-level { display: flex; flex-direction: column; overflow: hidden; border-radius: var(--radius); background: var(--tile); box-shadow: var(--shadow-s); }
.is-level__title {
  padding: 1.1rem 1.5rem; background: var(--gradient); color: var(--white);
  font-size: clamp(1.5rem, 1.3rem + .8vw, 1.875rem);
}
.is-level__body { display: flex; flex: 1; flex-direction: column; gap: .8rem; padding: 1.4rem 1.5rem 1.6rem; font-size: 1rem; }
.is-level__body h3 { font-size: 1.125rem; }
.is-level__how { display: grid; gap: .7rem; margin-top: auto; padding-top: 1.1rem; border-top: 1px solid var(--line); }
.is-level__how p:has(.btn) { margin-top: .25rem; }
.is-emoji-list { display: grid; gap: .35rem; font-weight: 700; color: var(--ink); }
.is-links { display: flex; flex-wrap: wrap; gap: .5rem; }
.is-links--center { justify-content: center; }
.is-links .btn--sm { --h: 40px; font-size: .875rem; }

/* ---------- Plus: Zeitstrahl Phase 1 bis 3 ---------- */
.is-head-question { max-width: 52rem; }
.is-head-question h2 { font-size: clamp(1.5rem, 1.15rem + 1.5vw, 2.25rem); line-height: 1.2; }
.is-timeline { position: relative; display: grid; gap: 1.5rem; max-width: 60rem; margin-inline: auto; }
.is-timeline::before {
  content: ""; position: absolute; left: 11px; top: .5rem; bottom: .5rem; width: 2px;
  border-radius: 2px; background: linear-gradient(180deg, var(--primary), var(--accent));
}
.is-timeline__item { position: relative; padding-left: 2.75rem; }
.is-timeline__dot {
  position: absolute; left: 3px; top: 1.6rem; width: 18px; height: 18px; border-radius: 50%;
  background: var(--primary); box-shadow: 0 0 0 5px var(--tile-2);
}
.is-timeline__item:nth-child(2) .is-timeline__dot { background: #0a6aa6; }
.is-timeline__item:nth-child(3) .is-timeline__dot { background: var(--accent); }
.is-timeline__card { padding: 1.4rem 1.6rem; border-radius: var(--radius); background: var(--tile); box-shadow: var(--shadow); }
.is-timeline__card h3 { margin-bottom: .4rem; font-size: 1.25rem; }
.is-timeline__card p { color: var(--muted); font-size: 1rem; }

/* ---------- Formular in der Abschluss-Kachel ---------- */
.is-anfrage h2 { font-size: clamp(1.75rem, 1.3rem + 1.8vw, 2.625rem); }
.is-anfrage .field { align-content: start; }
.is-form--einspaltig .demo-form__grid { grid-template-columns: minmax(0, 1fr); }

/* ---------- Bierdeckel ---------- */
.is-team { max-width: 900px; margin: 0 auto; }
.is-team img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.is-follow { display: grid; justify-items: center; gap: 1rem; margin-top: clamp(2rem, 5vw, 3rem); text-align: center; }

/* ---------- Lange Anleitungen (EDV, Cloudtelefonie) ---------- */
.is-doc { padding-top: clamp(2.5rem, 6vw, 4.5rem); }
.is-doc__grid { display: grid; gap: 2rem; align-items: start; }
.is-doc__grid--single { max-width: calc(64rem + 2 * var(--gutter)); }
.is-doc__body { min-width: 0; }

.is-toc__inner { padding: 1.25rem 1.4rem; border-radius: var(--radius); background: var(--tile); box-shadow: var(--shadow-s); }
.is-toc__title { margin-bottom: .6rem; color: var(--primary); font-size: .8125rem; font-weight: 900; letter-spacing: .12em; text-transform: uppercase; }
.is-toc ul { display: grid; gap: .35rem; }
.is-toc ul ul { gap: .1rem; margin: .3rem 0 .5rem .1rem; padding-left: .85rem; border-left: 2px solid var(--line); }
.is-toc a { display: block; padding: .15rem 0; color: var(--muted); font-size: .9375rem; line-height: 1.35; text-decoration: none; }
.is-toc a:hover { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.is-toc .is-toc__group { color: var(--ink); font-weight: 700; }

.is-group + .is-group { margin-top: clamp(3rem, 6vw, 4.5rem); }
.is-group__title { font-size: clamp(1.625rem, 1.25rem + 1.6vw, 2.375rem); }
.is-group__title::before { content: ""; display: block; width: 64px; height: 6px; margin-bottom: 1rem; border-radius: 99px; background: var(--gradient); }
.is-block {
  margin-top: 1.25rem; padding: clamp(1.25rem, 3.5vw, 2.25rem);
  border-radius: var(--radius); background: var(--tile); box-shadow: var(--shadow-s);
  font-size: 1rem;
}
.is-block > * + * { margin-top: 1rem; }
.is-block h3 { font-size: clamp(1.25rem, 1.1rem + .6vw, 1.5rem); line-height: 1.25; }
.is-block h4 { margin: 0; color: var(--primary); font-size: 1.0625rem; font-weight: 900; line-height: 1.35; }
.is-block > h4 { margin-top: 1.6rem; }
.is-block a { overflow-wrap: anywhere; }

.is-list { display: grid; gap: .45rem; }
.is-list li { position: relative; padding-left: 1.4rem; }
.is-list li::before { content: ""; position: absolute; left: .2rem; top: .62em; width: .5rem; height: .5rem; border-radius: 50%; background: var(--accent); }
.is-models strong { color: var(--primary); }

/* Nummerierte Schritte: Nummer im Verlaufskreis (CSS-Zähler, start="2" setzt fort) */
.is-num { display: grid; gap: 1.1rem; counter-reset: is-num; }
.is-num[start="2"] { counter-reset: is-num 1; }
.is-num > li { position: relative; padding-left: 2.75rem; counter-increment: is-num; }
.is-num > li::before {
  content: counter(is-num); position: absolute; left: 0; top: -.1rem;
  display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%;
  background: var(--gradient); color: var(--white); font-size: .9375rem; font-weight: 900;
}
.is-num > li > * + * { margin-top: .5rem; }

.is-media { display: grid; gap: 1.25rem 2rem; align-items: center; }
.is-media__text > * + * { margin-top: 1rem; }
.is-media__img { margin: 0; }
.is-media__img img { width: min(100%, 360px); margin-inline: auto; }
.is-media--csv { align-items: start; }
.is-media--csv .is-media__img img, .is-figure img { width: auto; max-width: 100%; margin-inline: 0; }
.is-figure { margin: 1.25rem 0 0; }
.is-csv { border: 1px solid var(--line); border-radius: 8px; box-shadow: var(--shadow-s); }
.is-tapi { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.75rem; }
.is-tapi__logo { width: 200px; }
.is-tapi > div { flex: 1 1 18rem; }
.is-tapi > div > * + * { margin-top: .5rem; }

/* Tabellen: ab 768 px klassisch, darunter je Zeile eine Karte mit Spaltennamen */
.is-table-wrap { margin-top: 1rem; }
.is-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: .9375rem; line-height: 1.5; }
.is-table th, .is-table td { padding: .7rem .9rem; text-align: left; vertical-align: top; }
.is-table thead th { background: var(--primary); color: var(--white); font-weight: 900; }
.is-table thead th:first-child { border-top-left-radius: 10px; }
.is-table thead th:last-child { border-top-right-radius: 10px; }
.is-table tbody th { color: var(--ink); font-weight: 700; }
.is-table tbody tr:nth-child(even) > * { background: var(--bg); }
.is-table tbody > tr > * { border-bottom: 1px solid var(--line); }

@media (max-width: 767.98px) {
  .is-table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
  .is-table, .is-table tbody, .is-table tr, .is-table th, .is-table td { display: block; }
  .is-table tbody { display: grid; gap: .75rem; }
  .is-table tbody tr { padding: .4rem 0; border: 1px solid var(--line); border-radius: 10px; background: var(--tile); }
  .is-table tbody tr:nth-child(even) > * { background: none; }
  .is-table tbody > tr > * { padding: .35rem .9rem; border-bottom: 0; }
  .is-table tbody th::before, .is-table td::before {
    content: attr(data-label); display: block;
    color: var(--muted); font-size: .75rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase;
  }
}

@media (min-width: 640px) {
  .is-callout { grid-template-columns: auto minmax(0, 1fr); gap: 1.75rem; }
}
@media (min-width: 768px) {
  .is-stores { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .is-media { grid-template-columns: minmax(0, 1fr) minmax(0, 300px); }
  .is-media--csv { grid-template-columns: minmax(0, 1fr); }
  /* Zeitstrahl: Linie mittig, Phasen abwechselnd links und rechts */
  .is-timeline { gap: 0; }
  .is-timeline::before { left: 50%; margin-left: -1px; }
  .is-timeline__item { width: 50%; padding: 0 2.75rem 0 0; }
  .is-timeline__item:nth-child(even) { margin-left: 50%; padding: 0 0 0 2.75rem; }
  .is-timeline__item + .is-timeline__item { margin-top: -1.5rem; }
  .is-timeline__item:nth-child(odd) .is-timeline__dot { left: auto; right: -9px; }
  .is-timeline__item:nth-child(even) .is-timeline__dot { left: -9px; }
}
@media (min-width: 1024px) {
  .is-hero .hero__deco { opacity: .28; }
  .is-hero--doc .page-hero__visual { justify-self: end; }
  .is-split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .is-levels { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .is-doc__grid { grid-template-columns: 270px minmax(0, 1fr); gap: 3rem; }
  .is-doc__grid--single { grid-template-columns: minmax(0, 1fr); }
  .is-toc { position: sticky; top: calc(var(--header-h) + var(--header-gap) + 1.5rem); }
  .is-toc__inner { max-height: calc(100vh - var(--header-h) - var(--header-gap) - 3rem); overflow-y: auto; }
  .is-media { grid-template-columns: minmax(0, 1fr) minmax(0, 320px); }
  .is-media--csv { grid-template-columns: minmax(0, 1fr); }
}