/* =====================================================================
   SudoSuite — Homepage
   Farbwerte 1:1 aus der App: sudog_app/lib/theme/neon_theme.dart
   Keine externen Ressourcen (keine CDNs, keine Google Fonts) -> DSGVO-sauber
   ===================================================================== */

:root{
  --bg:        #0B0B14;
  --bg2:       #161628;
  --panel:     #1A1A2E;

  --cyan:      #24E6E6;   /* SudoG       */
  --green:     #36E06A;   /* SudoP       */
  --magenta:   #FF3DCA;   /* SudoCreator */
  --purple:    #9C8CFF;   /* SudoSolver  */

  --text-hi:   #ECECFF;
  --text-lo:   #9090BC;

  --radius:    20px;
  --maxw:      1080px;

  /* Standard-Akzent, wird pro Modulkarte überschrieben */
  --c:         #24E6E6;
  --c-soft:    rgba(36,230,230,.25);
}

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

html{ scroll-behavior:smooth; }

body{
  margin:0;
  /* Roboto ist die App-Schrift. Lokal installiert wird sie genutzt, sonst
     fällt der Stack auf die System-Grotesk zurück. Zum lokalen Einbinden
     siehe README_HOMEPAGE.md — bewusst KEIN Google-Fonts-CDN. */
  font-family:"Roboto","Roboto Flex",system-ui,-apple-system,"Segoe UI",Arial,sans-serif;
  color:var(--text-hi);
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg2) 60%,var(--bg) 100%);
  background-attachment:fixed;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}

/* --- Sudoku-Gitternetz als Hintergrundtextur ------------------------- */
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    repeating-linear-gradient(0deg,  rgba(144,144,188,.10) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(144,144,188,.10) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(0deg,  rgba(36,230,230,.13)  0 1px, transparent 1px 102px),
    repeating-linear-gradient(90deg, rgba(36,230,230,.13)  0 1px, transparent 1px 102px);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 0%,transparent 75%);
          mask-image:radial-gradient(ellipse 90% 70% at 50% 0%,#000 0%,transparent 75%);
}

.wrap{ position:relative; z-index:1; }

.container{
  width:100%;
  max-width:var(--maxw);
  margin-inline:auto;
  padding-inline:20px;
}

/* --- Typografie ------------------------------------------------------ */
h1,h2,h3{ font-weight:700; line-height:1.2; margin:0 0 .5em; letter-spacing:-.01em; }
h2{ font-size:clamp(1.5rem,4vw,2.1rem); }
h3{ font-size:1.15rem; }
p{ margin:0 0 1em; }
.lead{ font-size:clamp(1.02rem,2.4vw,1.18rem); }
.muted{ color:var(--text-lo); }
a{ color:var(--cyan); }
a:focus-visible,button:focus-visible{
  outline:2px solid var(--cyan);
  outline-offset:3px;
  border-radius:6px;
}

section{ padding:clamp(48px,8vw,88px) 0; }
.section-head{ max-width:62ch; margin-bottom:32px; }

/* --- Kopfzeile ------------------------------------------------------- */
.topbar{
  display:flex; align-items:center; justify-content:space-between; gap:16px;
  padding:16px 0;
}
.brand-mini{ display:flex; align-items:center; gap:10px; text-decoration:none; }
.brand-mini img{ width:34px; height:34px; }
.brand-mini span{ font-weight:700; color:var(--text-hi); font-size:1.05rem; }

.lang{ display:flex; gap:4px; font-size:.85rem; }
.lang a{
  padding:5px 11px; border-radius:999px; text-decoration:none;
  color:var(--text-lo); border:1px solid rgba(144,144,188,.28);
}
.lang a[aria-current="true"]{
  color:var(--bg); background:var(--cyan); border-color:var(--cyan); font-weight:700;
}

/* --- Hero ------------------------------------------------------------ */
.hero{ padding-top:clamp(28px,5vw,56px); }
.hero-grid{
  display:grid; gap:clamp(32px,5vw,56px); align-items:center;
  grid-template-columns:1fr;
}
.wordmark{
  font-size:clamp(2.6rem,10vw,4.4rem);
  font-weight:700; letter-spacing:-.02em; line-height:1;
  margin:0 0 .18em;
}
.wordmark .sudo{  color:var(--cyan);    text-shadow:0 0 24px rgba(36,230,230,.45); }
.wordmark .suite{ color:var(--magenta); text-shadow:0 0 24px rgba(255,61,202,.45); }
.claim{
  font-size:clamp(1.05rem,3.2vw,1.35rem); font-weight:700;
  margin:0 0 .8em; letter-spacing:.02em;
}
.claim .sep{ color:var(--text-lo); font-weight:400; }

/* --- Buttons --------------------------------------------------------- */
.btn-row{ display:flex; flex-wrap:wrap; gap:14px; align-items:center; margin-top:26px; }
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 24px; border-radius:14px;
  font-weight:700; font-size:1rem; text-decoration:none;
  border:2px solid var(--cyan); color:var(--bg); background:var(--cyan);
  box-shadow:0 0 28px rgba(36,230,230,.30);
}
.btn:hover{ filter:brightness(1.08); }
.btn--soon{
  background:transparent; color:var(--text-lo);
  border-color:rgba(144,144,188,.45); box-shadow:none; cursor:default;
}
.btn svg{ width:20px; height:20px; }
.badge-note{ font-size:.85rem; color:var(--text-lo); }

/* --- Handy-Mockup ---------------------------------------------------- */
.phone{
  /* --c/--c-soft werden NICHT gesetzt, damit der Rahmen die Modulfarbe der
     umgebenden Karte erbt. Freistehende Rahmen setzen sie selbst (s. u.). */
  position:relative;
  width:min(260px,72vw);
  aspect-ratio:9/19;
  margin-inline:auto;
  padding:9px;
  border-radius:30px;
  background:#07070E;
  border:2px solid var(--c);
  box-shadow:0 0 42px -6px var(--c-soft), inset 0 0 0 1px rgba(236,236,255,.05);
}
.phone::after{ /* Hörerschlitz */
  content:""; position:absolute; top:16px; left:50%; transform:translateX(-50%);
  width:58px; height:5px; border-radius:3px; background:rgba(144,144,188,.35);
}
.phone img{ width:100%; height:100%; object-fit:cover; border-radius:22px; display:block; }
.phone .ph{ /* Platzhalter, solange kein Screenshot abgelegt ist */
  width:100%; height:100%; border-radius:22px;
  display:flex; align-items:center; justify-content:center; text-align:center;
  padding:18px; font-size:.85rem; color:var(--text-lo);
  background:
    repeating-linear-gradient(0deg,  rgba(144,144,188,.09) 0 1px,transparent 1px 26px),
    repeating-linear-gradient(90deg, rgba(144,144,188,.09) 0 1px,transparent 1px 26px),
    var(--panel);
}
.phone--hero{ width:min(292px,78vw); --c:#24E6E6; --c-soft:rgba(36,230,230,.45); }
/* Papierblatt statt Handy: DIN-Verhältnis, kein Hörerschlitz */
.phone--wide{ width:min(420px,88vw); aspect-ratio:1/1.414; border-radius:18px; }
.phone--wide::after{ display:none; }
.phone--wide img{ border-radius:12px; }

/* --- Modulkarten ----------------------------------------------------- */
.cards{ display:grid; gap:22px; grid-template-columns:1fr; }
.card{
  background:var(--panel);
  border:3px solid var(--c);
  border-radius:var(--radius);
  padding:24px 22px 26px;
  box-shadow:0 0 34px -10px var(--c-soft);
  display:flex; flex-direction:column; gap:14px;
}
.card h3{ color:var(--c); margin:0; font-size:1.3rem; }
.card p{ margin:0; color:var(--text-lo); }
.card .icon{
  width:46px; height:46px; display:grid; place-items:center;
  border-radius:12px; border:2px solid var(--c); color:var(--c);
  background:rgba(11,11,20,.6);
}
.card .icon svg{ width:24px; height:24px; }
.card .phone{ margin-top:4px; width:min(178px,58vw); }

.card--g{ --c:#24E6E6; --c-soft:rgba(36,230,230,.45); }
.card--p{ --c:#36E06A; --c-soft:rgba(54,224,106,.45); }
.card--c{ --c:#FF3DCA; --c-soft:rgba(255,61,202,.45); }
.card--s{ --c:#9C8CFF; --c-soft:rgba(156,140,255,.45); }

/* --- Kreislauf ------------------------------------------------------- */
.loop{ display:grid; gap:18px; grid-template-columns:1fr; margin-bottom:28px; }
.step{
  background:var(--panel);
  border:1px solid rgba(144,144,188,.25);
  border-left:4px solid var(--c);
  border-radius:16px; padding:18px 20px;
}
.step .num{
  font-size:.78rem; font-weight:700; letter-spacing:.14em;
  text-transform:uppercase; color:var(--c); display:block; margin-bottom:4px;
}
.step h3{ margin:0 0 6px; font-size:1.1rem; }
.step p{ margin:0; color:var(--text-lo); font-size:.95rem; }
.step--1{ --c:#FF3DCA; }
.step--2{ --c:#24E6E6; }
.step--3{ --c:#9C8CFF; }

.loop-quote{
  border-left:3px solid var(--purple);
  padding:4px 0 4px 18px; margin:0 0 26px;
  font-size:1.02rem;
}

/* --- Vorteile -------------------------------------------------------- */
.perks{ list-style:none; padding:0; margin:0; display:grid; gap:14px; grid-template-columns:1fr; }
.perks li{
  display:flex; gap:12px; align-items:flex-start;
  background:var(--panel); border:1px solid rgba(144,144,188,.22);
  border-radius:14px; padding:14px 16px;
}
.perks .tick{ color:var(--green); font-weight:700; flex:0 0 auto; line-height:1.5; }
.perks strong{ display:block; color:var(--text-hi); }
.perks .sub{ color:var(--text-lo); font-size:.92rem; }

/* --- Fuß ------------------------------------------------------------- */
.site-foot{
  border-top:1px solid rgba(144,144,188,.20);
  padding:34px 0 44px; margin-top:20px;
  color:var(--text-lo); font-size:.93rem;
}
.foot-grid{ display:flex; flex-wrap:wrap; gap:18px 32px; justify-content:space-between; }
.foot-links{ display:flex; flex-wrap:wrap; gap:18px; }
.foot-links a{ color:var(--text-lo); text-decoration:none; border-bottom:1px solid rgba(144,144,188,.4); }
.foot-links a:hover{ color:var(--cyan); border-color:var(--cyan); }

/* --- Rechtsseiten ---------------------------------------------------- */
.legal{ max-width:70ch; }
.legal h1{ font-size:clamp(1.7rem,5vw,2.3rem); }
.legal h2{ font-size:1.2rem; margin-top:2em; color:var(--cyan); }
.legal h3{ font-size:1.02rem; margin-top:1.6em; }
.legal address{ font-style:normal; }
.legal .box{
  background:var(--panel); border:1px solid rgba(144,144,188,.25);
  border-radius:16px; padding:18px 20px; margin:0 0 22px;
}
.legal ul{ padding-left:1.2em; color:var(--text-lo); }
.legal li{ margin-bottom:.4em; }

.todo{ /* Platzhalter, der vor dem Livegang ersetzt werden muss */
  background:rgba(255,61,202,.12);
  border:1px dashed var(--magenta);
  border-radius:8px; padding:1px 7px; color:var(--magenta);
  font-size:.92em; font-weight:700;
}
.note{
  border-left:3px solid var(--magenta);
  background:rgba(255,61,202,.07);
  padding:14px 18px; border-radius:0 12px 12px 0; margin:0 0 26px;
  color:var(--text-lo); font-size:.94rem;
}
.note strong{ color:var(--text-hi); }

/* --- Breakpoints ----------------------------------------------------- */
@media (min-width:640px){
  .cards{ grid-template-columns:repeat(2,1fr); }
  .loop{  grid-template-columns:repeat(3,1fr); }
  .perks{ grid-template-columns:repeat(2,1fr); }
}
@media (min-width:900px){
  .hero-grid{ grid-template-columns:1.15fr .85fr; }
  .hero .phone{ margin-inline:0; margin-left:auto; }
}

@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *{ animation:none !important; transition:none !important; }
}

/* --- Zusatzkarten unter den vier Modulen ----------------------------- */
.card--x{ --c:#FF3DCA; --c-soft:rgba(255,61,202,.45); }   /* Schwierigkeiten */
.card--y{ --c:#36E06A; --c-soft:rgba(54,224,106,.45); }   /* SudoSelect      */

/* Belegbare Zahlen als eine schmale Zeile in der Karte */
.card .facts{
  margin:0; padding:0; list-style:none;
  display:flex; flex-wrap:wrap; gap:4px 14px;
  font-size:.84rem; color:var(--text-lo);
}
.card .facts b{ color:var(--text-hi); font-weight:700; }

/* Pro-Marke wie in der App */
.pro{
  display:inline-block; vertical-align:middle; margin-left:8px;
  padding:2px 8px; border-radius:6px;
  font-size:.62em; font-weight:700; letter-spacing:.08em;
  color:#0B0B14; background:var(--c);
}

/* =====================================================================
   Blätter-Diashow — waagerecht wischbar, ohne JavaScript.
   scroll-snap rastet jedes Blatt ein; die Punkte darunter sind normale
   Anker-Links auf die <figure>-IDs.
   ===================================================================== */

.sheets{ --c:#FF3DCA; --c-soft:rgba(255,61,202,.45); }

.sheets-track{
  display:flex; gap:18px;
  overflow-x:auto; overscroll-behavior-x:contain;
  scroll-snap-type:x mandatory; scroll-behavior:smooth;
  padding:4px 2px 18px;
  scrollbar-width:thin; scrollbar-color:rgba(255,61,202,.6) transparent;
}
.sheets-track::-webkit-scrollbar{ height:8px; }
.sheets-track::-webkit-scrollbar-track{ background:rgba(144,144,188,.12); border-radius:4px; }
.sheets-track::-webkit-scrollbar-thumb{ background:rgba(255,61,202,.6); border-radius:4px; }

.sheet-slide{
  flex:0 0 min(300px,76vw);
  scroll-snap-align:center; scroll-margin-inline:20px;
  margin:0;
}
.sheet-slide img{
  width:100%; height:auto; display:block;
  border-radius:12px; background:#fff;
  border:2px solid var(--c);
  box-shadow:0 0 32px -12px var(--c-soft);
}
.sheet-slide figcaption{
  margin-top:10px; text-align:center;
  font-size:.86rem; color:var(--text-lo); line-height:1.45;
}
.sheet-slide figcaption b{ display:block; color:var(--text-hi); font-weight:700; }
.sheet-slide figcaption .qr{ color:var(--cyan); }

.sheets-dots{ display:flex; flex-wrap:wrap; gap:8px; justify-content:center; }
.sheets-dots a{
  min-width:42px; padding:6px 10px; border-radius:999px;
  text-align:center; text-decoration:none;
  font-size:.8rem; font-weight:700; color:var(--text-lo);
  border:1px solid rgba(144,144,188,.35);
}
.sheets-dots a:hover{ color:var(--magenta); border-color:var(--magenta); }
.sheets-hint{ text-align:center; font-size:.82rem; margin:14px 0 0; }

/* =====================================================================
   Download-Dialog — Auswahl im Look der App, ganz ohne JavaScript.
   Die versteckte Checkbox #dl-toggle öffnet das Fenster, die versteckten
   Radios schalten den passenden PDF-Link frei. Alle Radios, .chips und
   .dl-actions müssen Geschwister im .sheet bleiben, sonst greifen die
   ~-Selektoren nicht.
   ===================================================================== */

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

.btn--dl{
  border-color:var(--magenta); background:var(--magenta); color:#0B0B14;
  box-shadow:0 0 28px rgba(255,61,202,.30); cursor:pointer;
}
#dl-toggle:focus-visible + .btn-row .btn--dl{ outline:2px solid var(--cyan); outline-offset:3px; }

.dl-modal{
  display:none;
  position:fixed; inset:0; z-index:60;
  align-items:center; justify-content:center;
  padding:18px;
}
#dl-toggle:checked ~ .dl-modal{ display:flex; }

.dl-backdrop{
  position:absolute; inset:0; cursor:pointer;
  background:rgba(4,4,10,.84);
  -webkit-backdrop-filter:blur(3px); backdrop-filter:blur(3px);
}

/* Das „Handy" */
.sheet{
  position:relative;
  width:min(340px,100%);
  max-height:92vh; overflow-y:auto;
  padding:38px 20px 24px;
  border-radius:34px;
  border:2px solid var(--magenta);
  background:linear-gradient(180deg,#0B0B14 0%,#161628 100%);
  box-shadow:0 0 70px -12px rgba(255,61,202,.60), inset 0 0 0 1px rgba(236,236,255,.05);
}
.sheet::before{ /* Hörerschlitz wie bei den Mockups */
  content:""; position:absolute; top:15px; left:50%; transform:translateX(-50%);
  width:58px; height:5px; border-radius:3px; background:rgba(144,144,188,.35);
}
.sheet-close{
  position:absolute; top:30px; right:16px;
  width:32px; height:32px; border-radius:10px;
  display:grid; place-items:center; cursor:pointer;
  border:1px solid rgba(144,144,188,.35); color:var(--text-lo);
  font-size:1.1rem; line-height:1;
}
.sheet-close:hover{ color:var(--magenta); border-color:var(--magenta); }

.sheet-brand{ font-size:1.45rem; font-weight:700; margin:6px 0 2px; letter-spacing:-.01em; }
.sheet-brand .a{ color:var(--magenta); text-shadow:0 0 18px rgba(255,61,202,.45); }
.sheet-sub{ color:var(--text-lo); font-size:.9rem; margin:0 0 16px; }
.sheet-label{
  font-size:.75rem; font-weight:700; letter-spacing:.14em; text-transform:uppercase;
  color:var(--text-lo); margin:0 0 10px;
}
.sheet-note{ color:var(--text-lo); font-size:.8rem; margin:14px 0 0; text-align:center; }

/* Schwierigkeits-Chips wie im SudoCreator */
.chips{ display:flex; flex-wrap:wrap; gap:8px; margin-bottom:22px; }
.chips label{
  display:inline-flex; align-items:center;
  padding:8px 14px; border-radius:999px; cursor:pointer;
  font-size:.78rem; font-weight:700; letter-spacing:.06em; text-transform:uppercase;
  color:var(--text-lo);
  border:1.5px solid rgba(144,144,188,.45);
  background:rgba(26,26,46,.6);
  box-shadow:0 0 12px -6px rgba(144,144,188,.6);
}
.chips label:hover{ color:var(--text-hi); border-color:rgba(236,236,255,.5); }

/* Aktiver Chip + zugehöriger Link — je Schwierigkeit ein Paar */
#d1:checked ~ .chips label[for="d1"],
#d2:checked ~ .chips label[for="d2"],
#d3:checked ~ .chips label[for="d3"],
#d4:checked ~ .chips label[for="d4"],
#d5:checked ~ .chips label[for="d5"],
#d6:checked ~ .chips label[for="d6"],
#d7:checked ~ .chips label[for="d7"],
#d8:checked ~ .chips label[for="d8"],
#d9:checked ~ .chips label[for="d9"],
#d10:checked ~ .chips label[for="d10"],
#d11:checked ~ .chips label[for="d11"],
#d12:checked ~ .chips label[for="d12"],
#d13:checked ~ .chips label[for="d13"],
#d14:checked ~ .chips label[for="d14"],
#d15:checked ~ .chips label[for="d15"],
#d16:checked ~ .chips label[for="d16"],
#d17:checked ~ .chips label[for="d17"],
#d18:checked ~ .chips label[for="d18"]{
  color:var(--cyan); border-color:var(--cyan);
  background:rgba(36,230,230,.10);
  box-shadow:0 0 16px -4px rgba(36,230,230,.75);
}
#d1:focus-visible ~ .chips label[for="d1"],
#d2:focus-visible ~ .chips label[for="d2"],
#d3:focus-visible ~ .chips label[for="d3"],
#d4:focus-visible ~ .chips label[for="d4"],
#d5:focus-visible ~ .chips label[for="d5"],
#d6:focus-visible ~ .chips label[for="d6"],
#d7:focus-visible ~ .chips label[for="d7"],
#d8:focus-visible ~ .chips label[for="d8"],
#d9:focus-visible ~ .chips label[for="d9"],
#d10:focus-visible ~ .chips label[for="d10"],
#d11:focus-visible ~ .chips label[for="d11"],
#d12:focus-visible ~ .chips label[for="d12"],
#d13:focus-visible ~ .chips label[for="d13"],
#d14:focus-visible ~ .chips label[for="d14"],
#d15:focus-visible ~ .chips label[for="d15"],
#d16:focus-visible ~ .chips label[for="d16"],
#d17:focus-visible ~ .chips label[for="d17"],
#d18:focus-visible ~ .chips label[for="d18"]{ outline:2px solid var(--cyan); outline-offset:3px; }

.dl-actions{ position:relative; }
.dl-actions a{
  display:none;
  width:100%; justify-content:center;
  padding:15px 18px; border-radius:14px;
  font-weight:700; font-size:.95rem; letter-spacing:.04em; text-decoration:none;
  color:#0B0B14; background:var(--magenta); border:2px solid var(--magenta);
  box-shadow:0 0 26px -6px rgba(255,61,202,.7);
}
.dl-actions a:hover{ filter:brightness(1.08); }
#d1:checked ~ .dl-actions a[data-d="1"],
#d2:checked ~ .dl-actions a[data-d="2"],
#d3:checked ~ .dl-actions a[data-d="3"],
#d4:checked ~ .dl-actions a[data-d="4"],
#d5:checked ~ .dl-actions a[data-d="5"],
#d6:checked ~ .dl-actions a[data-d="6"],
#d7:checked ~ .dl-actions a[data-d="7"],
#d8:checked ~ .dl-actions a[data-d="8"],
#d9:checked ~ .dl-actions a[data-d="9"],
#d10:checked ~ .dl-actions a[data-d="10"],
#d11:checked ~ .dl-actions a[data-d="11"],
#d12:checked ~ .dl-actions a[data-d="12"],
#d13:checked ~ .dl-actions a[data-d="13"],
#d14:checked ~ .dl-actions a[data-d="14"],
#d15:checked ~ .dl-actions a[data-d="15"],
#d16:checked ~ .dl-actions a[data-d="16"],
#d17:checked ~ .dl-actions a[data-d="17"],
#d18:checked ~ .dl-actions a[data-d="18"]{ display:inline-flex; }

/* Druck: Gitter und Glows weg */
@media print{
  body{ background:#fff; color:#000; }
  body::before{ display:none; }
  .card,.step,.perks li,.legal .box{ box-shadow:none; background:#fff; }
  .dl-modal{ display:none !important; }
}