:root {
        --blue: #07558a;
        --blue-dark: #073f67;
        --blue-ink: #062f4f;
        --slate: #4e5960;
        --green: #6c9d58;
        --cyan: #4c96ad;
        --orange: #ee6e3b;
        --paper: #ffffff;
        --canvas: #f3f6f8;
        --line: #dbe3e8;
        --muted: #5f6f78;
        --shadow: 0 18px 45px rgba(5, 47, 78, 0.12);
      }

      * {
        box-sizing: border-box;
      }

      html {
        scroll-behavior: smooth;
      }

      body {
        margin: 0;
        color: var(--blue-ink);
        background: var(--canvas);
        font-family: Arial, Helvetica, sans-serif;
        font-size: 1rem;
        line-height: 1.5;
        -webkit-font-smoothing: antialiased;
      }

      a {
        color: inherit;
      }

      .site-header {
        min-height: 8rem;
        display: flex;
        align-items: stretch;
        justify-content: space-between;
        gap: 2rem;
        padding: 0 4.5vw;
        background: var(--paper);
        border-bottom: 1px solid var(--line);
      }

      .brand {
        display: flex;
        min-width: 0;
        align-items: center;
        gap: 1.1rem;
        text-decoration: none;
      }

      .brand-mark {
        width: 6.3rem;
        align-self: stretch;
        display: grid;
        place-items: center;
        color: white;
        background: var(--blue);
        font-size: 2.2rem;
        font-weight: 400;
        letter-spacing: -0.08em;
      }

      .brand-mark span {
        display: block;
        border: 2px solid rgba(255, 255, 255, 0.45);
        padding: 0.15rem 0.35rem 0.12rem 0.25rem;
        line-height: 1;
      }

      .brand-copy {
        display: flex;
        flex-direction: column;
        line-height: 1.05;
        text-transform: uppercase;
      }

      .brand-copy strong {
        max-width: 18rem;
        font-size: 1.05rem;
        letter-spacing: 0.045em;
      }

      .brand-copy small {
        margin-top: 0.45rem;
        color: var(--muted);
        font-size: 0.78rem;
        letter-spacing: 0.14em;
      }

      .header-right {
        display: flex;
        align-items: center;
        gap: clamp(1.1rem, 2.5vw, 2.6rem);
      }

      .disciplines {
        display: flex;
        align-items: center;
        gap: clamp(0.8rem, 2vw, 1.75rem);
      }

      .discipline {
        display: grid;
        grid-template-columns: 1.9rem auto;
        align-items: center;
        gap: 0.55rem;
        color: #1f2d35;
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.06em;
        line-height: 1.2;
        text-transform: uppercase;
      }

      .discipline::before {
        content: "";
        width: 1.9rem;
        height: 1.9rem;
        background: var(--discipline-color);
      }

      .school-link {
        display: inline-flex;
        align-items: center;
        gap: 0.55rem;
        color: var(--blue);
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.07em;
        text-decoration: none;
        text-transform: uppercase;
        white-space: nowrap;
      }

      .school-link svg {
        width: 1rem;
        height: 1rem;
        transition: transform 180ms ease;
      }

      .school-link:hover svg,
      .school-link:focus-visible svg {
        transform: translate(2px, -2px);
      }

      .intro {
        position: relative;
        min-height: 12.5rem;
        overflow: hidden;
        padding: 2.5rem max(4.5vw, calc((100vw - 78rem) / 2));
        color: white;
        background:
          linear-gradient(90deg, rgba(7, 85, 138, 0.96), rgba(7, 63, 103, 0.96)),
          repeating-linear-gradient(90deg, transparent 0 90px, rgba(255,255,255,.12) 90px 91px);
      }

      .intro::after {
        content: "";
        position: absolute;
        inset: 0 0 0 auto;
        width: 32%;
        background: linear-gradient(135deg, transparent 0 46%, rgba(255,255,255,.07) 46% 47%, transparent 47% 57%, rgba(255,255,255,.07) 57% 58%, transparent 58%);
        pointer-events: none;
      }

      .eyebrow {
        display: flex;
        align-items: center;
        gap: 0.75rem;
        margin: 0 0 0.45rem;
        color: rgba(255, 255, 255, 0.8);
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.16em;
        text-transform: uppercase;
      }

      .eyebrow::before {
        content: "";
        width: 2rem;
        height: 0.18rem;
        background: var(--orange);
      }

      h1 {
        margin: 0;
        font-size: clamp(2.35rem, 5vw, 4.7rem);
        line-height: 0.98;
        letter-spacing: -0.045em;
      }

      .intro-meta {
        display: inline-flex;
        align-items: center;
        gap: 0.6rem;
        margin-top: 1rem;
        color: rgba(255,255,255,.86);
        font-size: 0.9rem;
      }

      .intro-meta strong {
        display: grid;
        width: 1.75rem;
        height: 1.75rem;
        place-items: center;
        background: var(--orange);
        color: white;
        font-size: 0.78rem;
      }

      main {
        width: min(78rem, calc(100% - 9vw));
        margin: -2.6rem auto 0;
        position: relative;
        z-index: 1;
      }

      .tool-grid {
        display: grid;
        grid-template-columns: repeat(4, minmax(0, 1fr));
        gap: 1rem;
      }

      .tool-card {
        --card-accent: var(--blue);
        position: relative;
        min-height: 18rem;
        display: flex;
        flex-direction: column;
        overflow: hidden;
        padding: 1.55rem;
        background: var(--paper);
        border-top: 0.45rem solid var(--card-accent);
        box-shadow: var(--shadow);
        text-decoration: none;
        transform: translateY(0);
        transition: transform 180ms ease, box-shadow 180ms ease;
        animation: card-in 500ms ease both;
      }

      .tool-card:nth-child(2) { animation-delay: 60ms; }
      .tool-card:nth-child(3) { animation-delay: 120ms; }
      .tool-card:nth-child(4) { animation-delay: 180ms; }

      .tool-card::after {
        content: "";
        position: absolute;
        right: -3.3rem;
        bottom: -3.3rem;
        width: 7.5rem;
        height: 7.5rem;
        border: 1.4rem solid color-mix(in srgb, var(--card-accent) 12%, transparent);
        border-radius: 50%;
        pointer-events: none;
      }

      .tool-card:hover,
      .tool-card:focus-visible {
        transform: translateY(-0.35rem);
        box-shadow: 0 24px 54px rgba(5, 47, 78, 0.18);
      }

      .tool-card:focus-visible,
      .school-link:focus-visible {
        outline: 3px solid var(--orange);
        outline-offset: 4px;
      }

      .card-head {
        display: flex;
        align-items: flex-start;
        justify-content: space-between;
        gap: 1rem;
      }

      .card-number {
        color: var(--card-accent);
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.14em;
      }

      .card-icon {
        width: 2.8rem;
        height: 2.8rem;
        display: grid;
        place-items: center;
        color: var(--card-accent);
        background: color-mix(in srgb, var(--card-accent) 10%, white);
      }

      .card-icon svg {
        width: 1.45rem;
        height: 1.45rem;
        stroke: currentColor;
        stroke-width: 1.8;
        fill: none;
        stroke-linecap: round;
        stroke-linejoin: round;
      }

      .tool-card h2 {
        margin: 2.1rem 0 0.45rem;
        max-width: 13ch;
        font-size: clamp(1.35rem, 2vw, 1.65rem);
        line-height: 1.08;
        letter-spacing: -0.025em;
      }

      .tool-card p {
        margin: 0;
        color: var(--muted);
        font-size: 0.94rem;
        line-height: 1.5;
      }

      .card-action {
        display: inline-flex;
        align-items: center;
        gap: 0.65rem;
        margin-top: auto;
        padding-top: 1.75rem;
        color: var(--card-accent);
        font-size: 0.78rem;
        font-weight: 700;
        letter-spacing: 0.08em;
        text-transform: uppercase;
      }

      .card-action::after {
        content: "↗";
        font-size: 1.05rem;
        transition: transform 180ms ease;
      }

      .tool-card:hover .card-action::after,
      .tool-card:focus-visible .card-action::after {
        transform: translate(3px, -3px);
      }

      .footer {
        width: min(78rem, calc(100% - 9vw));
        display: flex;
        justify-content: space-between;
        gap: 1rem;
        margin: 2.25rem auto 0;
        padding: 1.35rem 0 2.5rem;
        color: var(--muted);
        border-top: 1px solid var(--line);
        font-size: 0.82rem;
      }

      .footer strong {
        color: var(--blue-ink);
      }

      @keyframes card-in {
        from { opacity: 0; transform: translateY(0.75rem); }
        to { opacity: 1; transform: translateY(0); }
      }

      @media (max-width: 68rem) {
        .disciplines {
          display: none;
        }

        .tool-grid {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }

        .tool-card {
          min-height: 15rem;
        }
      }

      @media (max-width: 42rem) {
        .site-header {
          min-height: 6.4rem;
          padding-right: 1rem;
          padding-left: 1rem;
          gap: 1rem;
        }

        .brand {
          gap: 0.8rem;
        }

        .brand-mark {
          width: 4.6rem;
          font-size: 1.7rem;
        }

        .brand-copy strong {
          max-width: 13rem;
          font-size: 0.8rem;
        }

        .brand-copy small {
          font-size: 0.65rem;
        }

        .school-link span {
          position: absolute;
          width: 1px;
          height: 1px;
          overflow: hidden;
          clip-path: inset(50%);
        }

        .school-link svg {
          width: 1.35rem;
          height: 1.35rem;
        }

        .intro {
          min-height: 11rem;
          padding: 2.1rem 1.25rem 3.75rem;
        }

        main,
        .footer {
          width: calc(100% - 2rem);
        }

        main {
          margin-top: -2rem;
        }

        .tool-grid {
          grid-template-columns: 1fr;
        }

        .tool-card {
          min-height: 13.5rem;
        }

        .tool-card h2 {
          margin-top: 1.35rem;
        }

        .footer {
          flex-direction: column;
        }
      }

      @media (prefers-reduced-motion: reduce) {
        html { scroll-behavior: auto; }
        *, *::before, *::after {
          animation-duration: 0.01ms !important;
          animation-iteration-count: 1 !important;
          transition-duration: 0.01ms !important;
        }
      }

      /* KPO-Oberfläche: abgerundete, klar gefasste Bereiche wie im Muster. */
      body {
        padding: 1rem 0 2rem;
        background:
          radial-gradient(circle at 12% 2%, rgba(108, 157, 88, 0.10), transparent 26rem),
          radial-gradient(circle at 92% 18%, rgba(76, 150, 173, 0.10), transparent 30rem),
          var(--canvas);
      }

      .site-header {
        position: relative;
        width: min(78rem, calc(100% - 3rem));
        min-height: 7.5rem;
        margin: 0 auto;
        padding: 0.7rem 1.5rem;
        align-items: center;
        overflow: hidden;
        border: 1px solid var(--line);
        border-radius: 1.5rem;
        box-shadow: var(--shadow);
      }

      .site-header::before,
      .intro::before {
        content: "";
        position: absolute;
        inset: 0 0 auto;
        z-index: 2;
        height: 0.38rem;
        background: linear-gradient(
          to right,
          var(--slate) 0 20%,
          var(--blue) 20% 50%,
          var(--green) 50% 75%,
          var(--cyan) 75% 100%
        );
        pointer-events: none;
      }

      .brand-mark {
        width: 5rem;
        height: 5rem;
        flex: 0 0 5rem;
        align-self: center;
        overflow: hidden;
        border-radius: 0.9rem;
        background: var(--blue);
        font-size: 0;
        letter-spacing: 0;
      }

      .brand-mark img {
        width: 100%;
        height: 100%;
        display: block;
        object-fit: cover;
      }

      .brand-copy strong {
        color: var(--blue-ink);
      }

      .discipline::before {
        border-radius: 0.55rem;
      }

      .intro {
        width: min(78rem, calc(100% - 3rem));
        min-height: 12rem;
        margin: 1.5rem auto 0;
        padding: 2.65rem 10rem 2.65rem 3rem;
        color: var(--blue-ink);
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: 1.5rem;
        box-shadow: var(--shadow);
      }

      .intro::after {
        inset: 0 0 0 auto;
        width: 7.5rem;
        background: linear-gradient(165deg, var(--blue) 0 65%, var(--cyan) 100%);
      }

      .intro > * {
        position: relative;
        z-index: 1;
      }

      .eyebrow,
      .intro-meta {
        color: var(--muted);
      }

      .eyebrow::before {
        background: var(--cyan);
      }

      .intro-meta strong {
        border-radius: 0.45rem;
        background: var(--green);
      }

      main {
        width: min(78rem, calc(100% - 3rem));
        margin-top: 1rem;
      }

      h1 {
        font-size: clamp(2.1rem, 4vw, 3.55rem);
      }

      .tool-card {
        overflow: hidden;
        border: 1px solid var(--line);
        border-radius: 1.15rem;
        box-shadow: 0 10px 28px rgba(5, 47, 78, 0.09);
      }

      .card-icon {
        border-radius: 0.7rem;
      }

      .footer {
        position: relative;
        width: min(78rem, calc(100% - 3rem));
        overflow: hidden;
        margin-top: 1rem;
        padding: 1.35rem 1.5rem 1.65rem;
        background: var(--paper);
        border: 1px solid var(--line);
        border-radius: 1.15rem;
        box-shadow: 0 8px 24px rgba(5, 47, 78, 0.07);
      }

      .footer::after {
        content: "";
        position: absolute;
        inset: auto 0 0;
        height: 0.32rem;
        background: linear-gradient(
          to right,
          var(--slate) 0 20%,
          var(--blue) 20% 50%,
          var(--green) 50% 75%,
          var(--cyan) 75% 100%
        );
      }

      .tool-grid--six {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .tool-grid--main {
        grid-template-columns: repeat(5, minmax(0, 1fr));
      }

      .tool-card--compact {
        min-height: 14.5rem;
      }

      .dashboard-back svg {
        transform: rotate(225deg);
      }

      .dashboard-back:hover svg,
      .dashboard-back:focus-visible svg {
        transform: rotate(225deg) translate(2px, -2px);
      }

      .tool-workspace {
        display: grid;
        gap: 1rem;
        margin-top: 1rem;
      }

      .calculator {
        scroll-margin-top: 1rem;
        padding: clamp(1.35rem, 3vw, 2rem);
        background: var(--paper);
        border: 1px solid var(--line);
        border-top: 0.32rem solid var(--tool-accent, var(--blue));
        border-radius: 1.15rem;
        box-shadow: 0 10px 28px rgba(5, 47, 78, 0.08);
      }

      .calculator h2 {
        margin: 0;
        font-size: clamp(1.3rem, 2vw, 1.65rem);
        line-height: 1.15;
      }

      .calculator > p {
        max-width: 52rem;
        margin: 0.45rem 0 1.25rem;
        color: var(--muted);
      }

      .calculator-form,
      .field-grid {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
      }

      .field-grid {
        grid-column: 1 / -1;
      }

      .field {
        display: grid;
        gap: 0.4rem;
        color: var(--blue-ink);
        font-size: 0.84rem;
        font-weight: 700;
      }

      .field--wide {
        grid-column: 1 / -1;
      }

      .field input,
      .field textarea {
        width: 100%;
        min-height: 3rem;
        padding: 0.75rem 0.85rem;
        color: var(--blue-ink);
        background: #f8fafb;
        border: 1px solid #cbd6dd;
        border-radius: 0.7rem;
        font: inherit;
        font-weight: 400;
      }

      .field textarea {
        min-height: 5.5rem;
        resize: vertical;
      }

      .field input:focus,
      .field textarea:focus {
        outline: 3px solid color-mix(in srgb, var(--tool-accent, var(--blue)) 22%, transparent);
        border-color: var(--tool-accent, var(--blue));
      }

      .calculate-button {
        align-self: end;
        min-height: 3rem;
        padding: 0.75rem 1rem;
        color: white;
        background: var(--tool-accent, var(--blue));
        border: 0;
        border-radius: 0.7rem;
        font: inherit;
        font-weight: 700;
        cursor: pointer;
      }

      .calculate-button:hover,
      .calculate-button:focus-visible {
        filter: brightness(0.92);
      }

      .tool-result {
        display: grid;
        align-content: center;
        min-height: 3rem;
        padding: 0.7rem 0.9rem;
        color: var(--blue-ink);
        background: color-mix(in srgb, var(--tool-accent, var(--blue)) 10%, white);
        border-radius: 0.7rem;
        font-weight: 700;
      }

      @media (max-width: 68rem) {
        .tool-grid--main,
        .tool-grid--six {
          grid-template-columns: repeat(2, minmax(0, 1fr));
        }
      }

      @media (max-width: 42rem) {
        body {
          padding: 0.75rem 0 1.5rem;
        }

        .site-header,
        .intro,
        main,
        .footer {
          width: calc(100% - 1.5rem);
        }

        .site-header {
          min-height: 5.8rem;
          padding: 0.7rem 1rem;
          border-radius: 1.15rem;
        }

        .brand-mark {
          width: 4.15rem;
          height: 4.15rem;
          flex-basis: 4.15rem;
          border-radius: 0.75rem;
        }

        .intro {
          min-height: 11rem;
          margin-top: 0.9rem;
          padding: 2.1rem 1.25rem 2.8rem;
          border-radius: 1.25rem;
        }

        .intro::after {
          inset: auto 0 0;
          width: auto;
          height: 0.42rem;
          background: linear-gradient(to right, var(--blue) 0 55%, var(--green) 55% 78%, var(--cyan) 78% 100%);
        }

        main {
          margin-top: 0.9rem;
        }

        .tool-card,
        .footer {
          border-radius: 1rem;
        }

        .tool-grid--main,
        .tool-grid--six,
        .calculator-form,
        .field-grid {
          grid-template-columns: 1fr;
        }

        .calculator {
          border-radius: 1rem;
        }
      }


/* Startseite – kompakte Gestaltung im Erscheinungsbild der KPO */
.site-header {
  gap: clamp(0.8rem, 2vw, 1.8rem);
  min-height: 6.5rem;
  padding: 0.75rem 1.5rem;
}
.site-header::before,
.intro::before { height: 0.19rem; }
.brand { flex: 0 1 auto; }
.school-logo {
  display: block;
  width: clamp(13rem, 24vw, 19rem);
  height: auto;
  max-height: 5.2rem;
  object-fit: contain;
  object-position: left center;
}
.header-right { flex: 1 1 auto; justify-content: flex-end; gap: clamp(0.8rem, 1.6vw, 1.5rem); }
.school-divisions-logo {
  display: block;
  width: min(47vw, 33rem);
  height: auto;
  max-height: 3.6rem;
  object-fit: contain;
}
.intro {
  min-height: 0;
  margin-top: 0.75rem;
  padding: 1.5rem 10rem 1.5rem 2rem;
}
.intro h1 {
  font-size: clamp(1.6rem, 2.5vw, 2.15rem);
  line-height: 1.16;
  letter-spacing: -0.025em;
}
.intro .eyebrow { margin-bottom: 0.35rem; }
main { margin-top: 0.75rem; }
.tool-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0.85rem; }
.tool-card {
  min-height: 14.4rem;
  padding: 1.1rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 1.15rem;
}
.tool-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 0.19rem;
  background: var(--card-accent);
}
.tool-card::after { opacity: 0.7; }
.tool-card h2 { margin: 0.95rem 0 0.4rem; font-size: clamp(1.2rem, 1.7vw, 1.45rem); }
.tool-card p { font-size: 0.88rem; line-height: 1.38; }
.tool-card p + p { margin-top: 0.35rem; }
.card-icon { width: 2.35rem; height: 2.35rem; }
.card-icon svg { width: 1.3rem; height: 1.3rem; }
.card-action { padding-top: 0.8rem; }
.footer { margin-top: 0.85rem; }

@media (max-width: 68rem) {
  .school-divisions-logo { width: min(42vw, 26rem); }
  .tool-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-card { min-height: 13.5rem; }
}
@media (max-width: 48rem) {
  .school-divisions-logo { display: none; }
  .school-logo { width: clamp(12rem, 42vw, 17rem); }
  .site-header { min-height: 5.8rem; }
}
@media (max-width: 42rem) {
  .site-header { padding: 0.7rem 1rem; }
  .intro { margin-top: 0.45rem; padding: 1.3rem 1.25rem 1.5rem; min-height: 0; }
  .intro h1 { font-size: clamp(1.45rem, 5vw, 1.9rem); }
  .intro::after { height: 0.21rem; }
  main { margin-top: 0.7rem; }
  .tool-grid { grid-template-columns: 1fr; }
  .tool-card { min-height: 11.5rem; padding: 1.1rem; }
  .tool-card h2 { margin-top: 0.7rem; }
}