/* ===========================
   Basis & Variablen
   =========================== */

:root{
  --bg: #f7f9fb;
  --surface: #ffffff;
  --surface-soft: #f1f3f6;
  --shadow: 0 6px 16px rgba(16, 24, 40, 0.08);

  --brand: #0f5c43;       /* dunkles Grün (Logo/CTA) */
  --brand-700: #0c4a36;
  --brand-600: #116a4c;
  --brand-500: #1f7a5c;
  --accent: #1a8f6a;      /* grünlich für Akzente */
  --cta: #2474d6;         /* Blau in der CTA-Bar */
  --cta-700: #1f5fb0;

  --excel: #1f8f5a;
  --word: #c74242;
  --ppt: #d67a2b;

  --text: #0f172a;
  --muted: #475569;

  --radius: 14px;
  --radius-sm: 10px;

  --container: 1200px;

  --focus: 2px solid #1a8f6a;

  --font-system: ui-sans-serif, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Segoe UI Variable", "SF Pro Text", "Noto Sans", "Liberation Sans", "DejaVu Sans", sans-serif;

  --s-1: clamp(0.8rem, 0.76rem + 0.2vw, 0.95rem);
  --s-2: clamp(1rem, 0.96rem + 0.35vw, 1.15rem);
  --s-3: clamp(1.15rem, 1.06rem + 0.6vw, 1.35rem);
  --s-4: clamp(1.35rem, 1.2rem + 1vw, 1.8rem);
  --s-5: clamp(1.8rem, 1.6rem + 1.8vw, 2.4rem);
  --s-6: clamp(2.2rem, 1.8rem + 2.8vw, 3rem);
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 16px/1.6 var(--font-system);
  text-rendering: optimizeLegibility;
}

img{ max-width: 100%; height: auto; display: block; }
a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }
:focus-visible{ outline: var(--focus); outline-offset: 2px; }

.container{
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.skip-link{
  position: absolute; left: -999px; top: 0;
  padding: .5rem .75rem; background: #000; color: #fff; z-index: 1000;
}
.skip-link:focus{ left: .5rem; top: .5rem; }

/* ===========================
   Header & Navigation
   =========================== */

.site-header{
  position: sticky; top: 0; z-index: 50;
  background: var(--surface);
  box-shadow: 0 1px 0 rgba(15,23,42,.06);
}

.header__inner{
  display: grid; grid-template-columns: 1fr auto auto; align-items: center;
  gap: 1rem; padding: .75rem 0;
}

.brand__link{ display: inline-flex; align-items: center; gap: .6rem; font-weight: 700; }
.brand__logo{ flex: 0 0 auto; }
.brand__text{ font-size: 1.05rem; color: var(--brand-700); letter-spacing: .2px; }

.site-nav{ display: contents; }
.site-nav__list{
  display: flex; gap: 1.2rem; list-style: none; margin: 0; padding: 0;
}
.site-nav__list a{
  padding: .5rem .25rem; color: #0b1a2b;
  border-radius: 8px;
}
.site-nav__list a:hover{ background: var(--surface-soft); text-decoration: none; }

.nav-cta .btn{ margin-left: .5rem; }

/* Mobile Menu (Checkbox Hack) */
.nav-toggle{ display: none; }
.nav-toggle-btn{
  display: none; width: 40px; height: 40px; border-radius: 8px;
  border: 1px solid #e5e7eb; align-items: center; justify-content: center;
}
.nav-toggle-btn span,
.nav-toggle-btn span::before,
.nav-toggle-btn span::after{
  display: block; width: 20px; height: 2px; background: #0b1a2b; content: "";
  position: relative; transition: .3s ease;
}
.nav-toggle-btn span::before{ position: absolute; top: -6px; }
.nav-toggle-btn span::after{ position: absolute; top: 6px; }

@media (max-width: 900px){
  .header__inner{ grid-template-columns: auto 1fr auto; }
  .nav-toggle-btn{ display: inline-flex; order: 2; }
  .site-nav{
    grid-column: 1 / -1; display: grid; grid-template-columns: 1fr;
  }
  .site-nav__list{
    display: none; flex-direction: column; gap: .25rem; padding: .5rem; background: var(--surface);
    border: 1px solid #e5e7eb; border-radius: 10px; margin-top: .5rem;
  }
  .nav-cta{ display: none; }

  .nav-toggle:checked ~ .site-nav .site-nav__list{ display: flex; }
}

/* ===========================
   Buttons
   =========================== */

.btn{
  --btn-bg: var(--brand);
  --btn-bg-h: var(--brand-700);
  --btn-color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  gap: .5rem;
  padding: .7rem 1.1rem; border-radius: 12px;
  background: var(--btn-bg); color: var(--btn-color);
  border: 0; font-weight: 600; text-decoration: none;
  box-shadow: 0 4px 10px rgba(16,24,40,.08);
  transition: transform .04s ease, background .2s ease, box-shadow .2s ease;
}
.btn:hover{ background: var(--btn-bg-h); text-decoration: none; }
.btn:active{ transform: translateY(1px); }
.btn--primary{ --btn-bg: var(--brand); --btn-bg-h: var(--brand-600); }
.btn--secondary{ --btn-bg: var(--cta); --btn-bg-h: var(--cta-700); }
.btn--ghost{
  --btn-bg: transparent; --btn-bg-h: rgba(15,92,67, .08); --btn-color: var(--brand-700);
  border: 1px solid rgba(15,92,67,.25); box-shadow: none;
}

/* ===========================
   Hero
   =========================== */

.hero{
  background:
    radial-gradient(1200px 380px at 20% 10%, rgba(26,143,106,0.25), transparent 60%),
    linear-gradient(180deg, #eff6f3, #e7efe9 60%, #eaf0ef);
  border-bottom: 1px solid rgba(15,23,42,.06);
}
.hero__grid{
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2rem;
  align-items: center; padding: 2.2rem 0 2.6rem;
}
.hero__title{
  font-size: var(--s-6); line-height: 1.1; margin: 0 0 .6rem 0; letter-spacing: -.02em;
}
.hero__title .accent{ color: var(--brand-600); }
.hero__subtitle{ color: var(--muted); font-size: var(--s-3); margin: 0; }

.hero__media{
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  background: #dfe7e2;
}

@media (max-width: 991px){
  .hero__grid{ grid-template-columns: 1fr; padding: 1.4rem 0 2rem; }
  .hero__media{ order: -1; }
}

/* ===========================
   Cards
   =========================== */

.cards-section{ padding: 1.5rem 0 0; }
.cards-grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem;
}

.card{
  background: var(--surface);
  border: 1px solid #e6e8ec;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card__header{
  display: flex; align-items: center; gap: .6rem;
  padding: .9rem 1rem; border-bottom: 1px solid #eef0f3;
  background: linear-gradient(0deg, #fafbfc, #ffffff);
}
.card__header--excel .card__title{ color: var(--excel); }
.card__header--word  .card__title{ color: var(--word); }
.card__header--ppt   .card__title{ color: var(--ppt); }

.card__title{ font-size: var(--s-3); margin: 0; }
.card__icon{ font-size: 1.2rem; }

.card__media img{ width: 100%; display: block; }

.card__list{
  list-style: none; margin: 0; padding: .4rem .8rem .9rem;
  display: grid; gap: .4rem;
}
.card__link{
  display: grid; gap: .1rem; padding: .6rem .5rem; border-radius: var(--radius-sm);
  color: #0b1a2b; text-decoration: none;
}
.card__link:hover{
  background: var(--surface-soft); text-decoration: none;
}
.card__link span{ color: var(--muted); font-size: .95rem; }

@media (max-width: 1100px){
  .cards-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px){
  .cards-grid{ grid-template-columns: 1fr; }
}

/* ===========================
   CTA-Bar
   =========================== */

.cta-bar{
  margin-top: 1rem;
  background: linear-gradient(180deg, #e9f0fb, #e3ecf8);
  border-top: 1px solid #dfe7f5; border-bottom: 1px solid #dfe7f5;
}
.cta-bar__inner{
  display: grid; grid-template-columns: 1fr auto auto; gap: 1rem; align-items: center;
  padding: 1rem 0;
}
.cta-bar__title{
  margin: 0; font-size: var(--s-4);
  color: #0b1a2b;
}
.cta-bar__card{
  background: #ffffff; border: 1px solid #d7e0ea; padding: .7rem .9rem;
  border-radius: 12px; display: grid; grid-auto-flow: column; align-items: center; gap: .8rem;
}

@media (max-width: 900px){
  .cta-bar__inner{
    grid-template-columns: 1fr; justify-items: start;
  }
  .cta-bar__card{ width: 100%; }
}

/* ===========================
   Kurs-Teaser
   =========================== */

.kurs-teaser{ padding: 1.4rem 0 1.2rem; }
.kurs-teaser__grid{
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 2rem; align-items: center;
}
.kurs-teaser__content h2{
  font-size: var(--s-4); margin: 0 0 .4rem 0;
}
.kurs-teaser__content p{ margin: 0 0 .6rem 0; color: var(--muted); }
.benefits{ list-style: none; padding: 0; margin: 0 0 .8rem 0; display: grid; gap: .3rem; }
.benefits li::before{
  content: "✓"; margin-right: .5rem; color: var(--brand-600);
}
.kurs-teaser__media{
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
}

@media (max-width: 991px){
  .kurs-teaser__grid{ grid-template-columns: 1fr; }
}

/* ===========================
   Download
   =========================== */

.download{ padding: .8rem 0 1.6rem; }
.download h2{ margin: 0 0 .4rem 0; font-size: var(--s-4); }
.download p{ color: var(--muted); margin: 0 0 .8rem 0; }

.download__grid{
  display: grid; grid-template-columns: repeat(3, 1fr); gap: .8rem;
}
.download__item{
  background: var(--surface); border: 1px solid #e6e8ec; border-radius: 12px;
  padding: .9rem; display: grid; gap: .2rem; text-decoration: none;
  box-shadow: var(--shadow);
}
.download__item:hover{ background: var(--surface-soft); text-decoration: none; }
.download__title{ font-weight: 700; }
.download__meta{ color: var(--muted); font-size: .95rem; }

@media (max-width: 900px){
  .download__grid{ grid-template-columns: 1fr; }
}

/* ===========================
   Footer
   =========================== */

.site-footer{
  margin-top: .5rem; background: var(--surface);
  border-top: 1px solid #e6e8ec;
}
.footer__grid{
  display: grid; grid-template-columns: 1fr 2fr; gap: 2rem; padding: 1.2rem 0;
}
.footer__title{ margin: 0 0 .5rem 0; font-size: 1.05rem; color: #0b1a2b; }
.footer__list{ list-style: none; padding: 0; margin: 0; display: grid; gap: .35rem; }
.footer__list a{ color: #0b1a2b; }
.footer__list a:hover{ text-decoration: underline; }

.footer__base{
  background: var(--surface-soft); border-top: 1px solid #e5e7eb;
}
.footer__base-inner{
  display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: .8rem 0;
}
.footer__meta{
  display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0;
}

@media (max-width: 900px){
  .footer__grid{ grid-template-columns: 1fr; }
  .footer__base-inner{ flex-direction: column; align-items: flex-start; }
}

/* ===========================
   Feinheiten
   =========================== */

.header__inner, .hero__grid, .cards-section, .cta-bar__inner, .kurs-teaser, .download, .footer__grid, .footer__base-inner{
  /* visuelle Dichte wie im Screenshot */
}

.card, .hero__media, .kurs-teaser__media, .download__item{
  /* leichte 3D-Anmutung */
  transition: transform .06s ease, box-shadow .2s ease;
}
.card:hover, .download__item:hover{
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(16,24,40,.10);
}

/* Weniger Bewegung bevorzugen */
@media (prefers-reduced-motion: reduce){
  *{ transition: none !important; animation: none !important; }
}