/* StudiNow – Website. Farben wie die App (app/static/style.css, UFTheme.swift); dunkel nach Systemeinstellung.
   Startseite wie eine Lernplattform (05.11.2026): Einstieg auf Karopapier mit iPad-Rahmen, Vertrauensleiste, Funktionen
   mit Bildschirmfotos, Schritte, Tarife, Fragen (details/summary, ohne Skript), Fusszeile mit allen Seiten. */
:root {
  color-scheme: light dark;
  --bg: #f6f7fb; --surface: #ffffff; --surface-2: #f1f3f9; --line: #e5e8f0; --line-strong: #d3d8e4;
  --text: #171a26; --text-2: #4b5168; --muted: #5f667d;
  --accent: #4f5bd5; --accent-strong: #3f4bc2; --accent-soft: #eceefc; --accent-text: #3a45b4;
  --ok: #1f9d5b; --warn: #8a4d03; --warn-soft: #fdf0dc; --on-fill: #ffffff;
  --hero: #eceefb; --grid: rgba(79, 91, 213, .11); --ink: #2a3a9c;
  --bezel: #1d2030; --shadow: 0 34px 60px -28px rgba(37, 45, 120, .45);
  --band: #3f4bc2; --band-text: #ffffff; --band-btn: #ffffff; --band-btn-text: #2f3aa6;
  --store: #171a26; --store-text: #ffffff;
  --r: 14px; --r-lg: 22px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1117; --surface: #171a23; --surface-2: #1f2330; --line: #262b3a; --line-strong: #333a4d;
    --text: #e8eaf2; --text-2: #b3b9cc; --muted: #959cb2;
    --accent: #7b86f0; --accent-strong: #6a76e8; --accent-soft: #232848; --accent-text: #a9b1ff;
    --ok: #3fbf7c; --warn: #e9a04a; --warn-soft: #3a2a14; --on-fill: #0f1117;
    --hero: #131729; --grid: rgba(123, 134, 240, .09); --ink: #a9b1ff;
    --bezel: #2a2f40; --shadow: 0 34px 60px -28px rgba(0, 0, 0, .8);
    --band: #262c6b; --band-text: #ffffff; --band-btn: #e8eaf2; --band-btn-text: #262c6b;
    --store: #e8eaf2; --store-text: #0f1117;
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 5rem; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body { margin: 0; font: 17px/1.6 var(--font); color: var(--text); background: var(--bg); min-height: 100vh; }
a { color: var(--accent-text); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: .18em; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3 { font-family: var(--display); line-height: 1.2; letter-spacing: -.015em; font-weight: 700; color: var(--text); }
h1 { font-size: 2.1rem; margin: 0 0 1rem; letter-spacing: -.025em; }
h2 { font-size: 1.35rem; margin: 2.2rem 0 .6rem; }
h3 { font-size: 1.08rem; margin: 1.5rem 0 .4rem; }
p, li { color: var(--text); }
ul, ol { padding-left: 1.4rem; }
li { margin: .25rem 0; }
img { max-width: 100%; height: auto; }
code { font-family: var(--mono); font-size: .88em; background: var(--surface-2); padding: .05rem .35rem; border-radius: 4px; overflow-wrap: anywhere; }
table { border-collapse: collapse; width: 100%; font-size: .92rem; margin: 1rem 0; display: block; overflow-x: auto; }
th, td { border: 1px solid var(--line); padding: .5rem .65rem; text-align: left; vertical-align: top; }
th { background: var(--surface-2); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2rem 0; }
mark.todo { background: var(--warn-soft); color: var(--warn); padding: 0 .25rem; border-radius: 3px; }
.ico { width: 1.25em; height: 1.25em; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.wrap { width: min(1160px, 100% - 32px); margin-inline: auto; }
.skip { position: absolute; left: -9999px; top: .5rem; z-index: 20; padding: .6rem 1rem; background: var(--surface); color: var(--text); border-radius: 8px; }
.skip:focus { left: 16px; }

/* Kopf */
.header { background: var(--surface); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 10; }
.header-inner { display: flex; align-items: center; gap: .5rem 1.6rem; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--text); font-family: var(--display); font-weight: 800; font-size: 1.12rem; letter-spacing: -.01em; text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 9px; display: block; }
.nav { display: flex; gap: .2rem; margin-left: auto; }
.nav a { padding: .45rem .75rem; border-radius: 8px; color: var(--text-2); font-weight: 550; font-size: .95rem; text-decoration: none; }
.nav a:hover { background: var(--surface-2); color: var(--text); }
.nav a[aria-current="page"] { background: var(--accent-soft); color: var(--accent-text); }

/* Knoepfe */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; padding: .85rem 1.35rem; border-radius: 12px; border: 2px solid transparent;
  font-weight: 700; font-size: 1rem; line-height: 1.2; text-decoration: none; }
.btn:hover { text-decoration: none; }
.btn-store { background: var(--store); color: var(--store-text); }
.btn-store:hover { box-shadow: 0 0 0 4px var(--accent-soft), 0 0 0 5px var(--accent); }
.btn-ghost { background: var(--surface); color: var(--text); border-color: var(--line-strong); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent-text); }
.btn-small { padding: .5rem .95rem; font-size: .92rem; border-radius: 10px; background: var(--accent); color: var(--on-fill); }
.btn-small:hover { background: var(--accent-strong); }
.btn-invert { background: var(--band-btn); color: var(--band-btn-text); }
.btn-invert:hover { background: var(--band-btn); color: var(--band-btn-text); box-shadow: 0 0 0 3px rgba(255, 255, 255, .35); }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: .75rem; margin: 2rem 0 1rem; }
.note { color: var(--muted); font-size: .92rem; margin: 0; }
.note strong { color: var(--text-2); }
.fine { color: var(--muted); font-size: .88rem; max-width: 46rem; }

/* Startseite */
main.home h2 { font-size: clamp(1.75rem, 1.2rem + 2vw, 2.6rem); line-height: 1.1; letter-spacing: -.028em; font-weight: 800; margin: 0 0 .9rem; }
main.home h3 { margin: .9rem 0 .35rem; font-size: 1.1rem; }
.hero { background-color: var(--hero);
  background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 22px 22px; background-position: -1px -1px; border-bottom: 1px solid var(--line); }
.hero-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 3.5rem; align-items: center; padding: 5rem 0 4.5rem; }
.hero h1 { font-size: clamp(2.6rem, 1.2rem + 4.4vw, 4.4rem); line-height: 1.02; letter-spacing: -.045em; font-weight: 850; margin: 0 0 1.4rem; max-width: 9.5em; }
.eyebrow { display: inline-block; margin: 0 0 1rem; padding: .3rem .85rem; border-radius: 999px; background: var(--surface); border: 1.5px solid var(--line-strong);
  color: var(--accent-text); font-weight: 700; font-size: .92rem; letter-spacing: .01em; }
.unis { display: flex; gap: .6rem; align-items: flex-start; margin: 1.3rem 0 0; max-width: 32rem; color: var(--text-2); font-size: .97rem; line-height: 1.5; }
.unis .ico { width: 1.5rem; height: 1.5rem; margin-top: .05rem; color: var(--accent-text); }
.unis strong { color: var(--text); }
.lead { font-size: 1.2rem; line-height: 1.55; color: var(--text-2); max-width: 32rem; margin: 0; }
.hero-shot { margin: 0; }
.device { background: var(--bezel); border-radius: 28px; padding: 11px; box-shadow: var(--shadow); }
.device img { display: block; width: 100%; height: auto; border-radius: 18px; }
.hero-shot figcaption { display: flex; align-items: flex-end; gap: .4rem; margin: .9rem 0 0 1.2rem; color: var(--ink); font-size: .95rem; font-weight: 600; }
.scribble { width: 54px; height: 34px; flex: none; fill: none; stroke: var(--ink); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; transform: translateY(-.35rem) scaleY(-1); }

.trust { background: var(--surface); border-bottom: 1px solid var(--line); }
.trust-list { list-style: none; padding: 1.6rem 0; margin-block: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1.25rem 2rem; }
.trust-list li { display: flex; gap: .8rem; align-items: flex-start; margin: 0; font-size: .93rem; line-height: 1.5; color: var(--text-2); }
.trust-list li strong { display: block; color: var(--text); }
.trust-list .ico { width: 2.4rem; height: 2.4rem; padding: .5rem; border-radius: 50%; background: var(--accent-soft); color: var(--accent-text); }

.section { padding: 5.5rem 0; }
.tint { background: var(--surface); border-block: 1px solid var(--line); }
.section-head { max-width: 42rem; margin-bottom: 2.75rem; }
.section-head p { color: var(--text-2); font-size: 1.1rem; margin: 0; }
.systems { list-style: none; padding: 0; margin: 1.4rem 0 0; display: flex; flex-wrap: wrap; gap: .5rem; }
.systems li { margin: 0; padding: .35rem .9rem; border: 1.5px solid var(--line-strong); border-radius: 999px; font-weight: 700; font-size: .92rem; background: var(--surface); }
.tiles { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 2.6rem 2.2rem; }
.tiles li { margin: 0; padding-top: 1.2rem; border-top: 2px solid var(--line-strong); }
.tiles .ico { width: 1.6rem; height: 1.6rem; color: var(--accent-text); }
.tiles p { color: var(--text-2); margin: 0; font-size: .97rem; }

.feature-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 4rem; align-items: center; }
.feature.alt .feature-text { order: 2; }
.feature-text > p { color: var(--text-2); font-size: 1.08rem; }
.feature .shot { margin: 0; }
.checks { list-style: none; padding: 0; margin: 1.3rem 0; }
.checks li { position: relative; padding-left: 1.9rem; margin: .55rem 0; }
.checks li::before { content: ""; position: absolute; left: .35rem; top: .3em; width: .42rem; height: .78rem; border: solid var(--ok); border-width: 0 2.5px 2.5px 0; transform: rotate(45deg); }

.feature + .steps-band { border-top: 1px solid var(--line); }
.steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.5rem; counter-reset: step; }
.steps li { margin: 0; position: relative; padding-top: 4.4rem; counter-increment: step; }
.steps li::before { content: counter(step); position: absolute; top: 0; left: 0; width: 3.1rem; height: 3.1rem; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent); color: var(--on-fill); font-family: var(--display); font-weight: 800; font-size: 1.3rem; }
.steps li::after { content: ""; position: absolute; top: 1.55rem; left: 4rem; right: -1.5rem; border-top: 2px dashed var(--line-strong); }
.steps li:last-child::after { display: none; }
.steps h3 { margin-top: 0; }
.steps p { color: var(--text-2); margin: 0; }

.plans { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; align-items: start; margin-bottom: 1.5rem; }
.plan { background: var(--bg); border: 1px solid var(--line-strong); border-radius: var(--r-lg); padding: 1.8rem 1.7rem 1.4rem; }
.plan-top { border: 2px solid var(--accent); box-shadow: 0 24px 48px -30px var(--accent); }
.plan h3 { margin: 0; font-size: 1.15rem; }
.price { margin: .8rem 0 .2rem; color: var(--muted); }
.amount { font-family: var(--display); font-size: 2.6rem; font-weight: 850; letter-spacing: -.03em; color: var(--text); line-height: 1; }
.tagline { color: var(--text-2); font-size: .95rem; min-height: 3em; margin: .6rem 0 0; }
.plan .checks { border-top: 1px solid var(--line); padding-top: 1rem; font-size: .97rem; }

.faq-grid { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); gap: 3rem; align-items: start; }
.faq-list details { border-bottom: 1px solid var(--line-strong); }
.faq-list details:first-child { border-top: 1px solid var(--line-strong); }
.faq-list summary { cursor: pointer; list-style: none; position: relative; padding: 1.15rem 2.6rem 1.15rem 0; font-weight: 700; font-size: 1.06rem; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: .4rem; top: .85rem; font-size: 1.5rem; font-weight: 400; color: var(--accent-text); }
.faq-list details[open] summary::after { content: "\2013"; }
.faq-list details p { margin: 0 0 1.25rem; color: var(--text-2); max-width: 40rem; }

.closing { background: var(--band); color: var(--band-text); }
.closing-inner { padding: 4.5rem 0; text-align: center; }
main.home .closing h2 { color: var(--band-text); margin: 0 auto; max-width: 18em; }
.closing .cta { justify-content: center; }
.closing .note { color: var(--band-text); opacity: .9; }

/* Textseiten (Rechtliches, Support, Einladung) */
main.doc { padding: 3rem 0 4.5rem; }
.prose { width: min(52rem, 100% - 32px); margin-inline: auto; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: 2.6rem clamp(1.2rem, 5vw, 3.2rem) 2.4rem; overflow-wrap: break-word; }
.prose > h1:first-child { margin-top: 0; font-size: clamp(1.9rem, 1.4rem + 1.8vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; }
.prose h2 { padding-top: .2rem; }

/* Fuss */
.footer { background: var(--surface); border-top: 1px solid var(--line); color: var(--muted); font-size: .93rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 2fr) repeat(3, minmax(0, 1fr)); gap: 2rem; padding: 3.2rem 0 2rem; }
.footer-about p { color: var(--muted); max-width: 22rem; margin: .8rem 0 0; }
.footer-col p { margin: 0 0 .7rem; color: var(--text); font-weight: 700; }
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin: .45rem 0; }
.footer a { color: var(--text-2); text-decoration: none; }
.footer a:hover { color: var(--accent-text); text-decoration: underline; }
.footer a[aria-current="page"] { color: var(--accent-text); font-weight: 650; }
.footer .brand { color: var(--text); }
.footer .brand:hover { color: var(--text); text-decoration: none; }
.footer-bottom { border-top: 1px solid var(--line); padding: 1.2rem 0 2rem; display: flex; flex-wrap: wrap; gap: .4rem 1.5rem; justify-content: space-between; }

@media (max-width: 960px) {
  .hero-grid, .feature-grid, .faq-grid { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .hero-grid { padding: 3.5rem 0 3rem; }
  .feature.alt .feature-text { order: 0; }
  .trust-list, .tiles { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .plans { grid-template-columns: minmax(0, 1fr); max-width: 30rem; }
  .footer-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer-about { grid-column: 1 / -1; }
}
@media (max-width: 720px) {
  .header { position: static; }
  .header-inner { flex-wrap: wrap; padding: .6rem 0; }
  .header .btn-small { margin-left: auto; }
  .nav { order: 3; width: 100%; margin: 0 -.75rem; overflow-x: auto; }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 2rem; }
  .steps li { padding: .3rem 0 0 4.2rem; min-height: 3.1rem; }
  .steps li::after { display: none; }
}
@media (max-width: 600px) {
  body { font-size: 16px; }
  h1 { font-size: 1.7rem; }
  .section { padding: 3.75rem 0; }
  .lead { font-size: 1.08rem; }
  .trust-list, .tiles { grid-template-columns: minmax(0, 1fr); }
  .tiles { gap: 1.6rem; }
  .tiles li { display: grid; grid-template-columns: 1.6rem minmax(0, 1fr); gap: 0 .8rem; padding-top: 1rem; }
  .tiles li > * { grid-column: 2; }
  .tiles li > .ico { grid-column: 1; grid-row: 1 / span 2; margin-top: .1rem; }
  main.home .tiles h3 { margin-top: 0; }
  .device { border-radius: 16px; padding: 6px; }
  .device img { border-radius: 11px; }
  .hero-shot figcaption { margin-left: .2rem; font-size: .88rem; }
  .cta .btn { flex: 1 1 100%; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  main.doc { padding: 1.25rem 0 3rem; }
}