/* ===========================================================================
   Rusantech Systems — Kette „Vom Anruf bis zur Rechnung“ und Automatisierung
   ---------------------------------------------------------------------------
   Zwei Bausteine mit Bewegung, rein in CSS (und eine kleine SVG-Animation):
   • .sy-chain: fünf Stationen, ein Lichtpunkt läuft durch, jede Station
     leuchtet kurz auf, wenn er sie erreicht.
   • .sy-mod: Modul 1 zeigt Systems als Mitte mit allem, was daran hängt
     (.sy-hub), Modul 2 drei Abläufe, in denen nacheinander die Schritte
     aufleuchten (.sy-flow).
   Mit „weniger Bewegung“ im System steht alles still, nichts fehlt.
   Farben kommen von der Markenfarbe (--accent), geladen nach design.css.
   =========================================================================== */

/* --- Kette ---------------------------------------------------------------- */
.sy-chain {
  margin-top: clamp(44px, 6vw, 80px);
  padding: clamp(24px, 3.4vw, 44px) clamp(18px, 3vw, 40px) clamp(26px, 3.4vw, 40px);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-lg);
  background: radial-gradient(80% 140% at 50% 0%, rgba(var(--accent-rgb), 0.12), transparent 62%), var(--surface);
}

.sy-chain__head {
  max-width: 640px;
  margin: 0 auto clamp(26px, 3.4vw, 40px);
  text-align: center;
}

.sy-chain__head h3 {
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.sy-chain__steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  list-style: none;
}

/* Die Schiene hinter den Stationen und der Lichtpunkt darauf */
.sy-chain__steps::before {
  content: '';
  position: absolute;
  top: 31px;
  right: 10%;
  left: 10%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-line), rgba(var(--accent-rgb), 0.5), var(--accent-line));
}

.sy-chain__steps::after {
  content: '';
  position: absolute;
  top: 27px;
  left: 10%;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px 3px rgba(var(--accent-rgb), 0.8);
  opacity: 0;
}

.sy-chain li {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: start;
  justify-items: center;
  gap: 6px;
  padding: 0 6px;
  text-align: center;
}

.sy-chain__node {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin-bottom: 8px;
  border: 1px solid var(--accent-line);
  border-radius: 20px;
  background: var(--bg, #090c14);
  color: var(--accent);
  box-shadow: 0 0 0 6px var(--surface);
}

.sy-chain li.is-key .sy-chain__node {
  border-color: var(--accent);
  background: linear-gradient(150deg, rgba(var(--accent-rgb), 0.3), rgba(var(--accent-rgb), 0.08));
}

.sy-chain__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
}

.sy-chain b {
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 600;
  line-height: 1.25;
}

.sy-chain__text {
  max-width: 22ch;
  font-size: 13.5px;
  line-height: 1.45;
  color: var(--text-secondary);
}

@media (max-width: 900px) {
  .sy-chain__steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .sy-chain__steps::before {
    top: 32px;
    right: auto;
    bottom: 32px;
    left: 31px;
    width: 2px;
    height: auto;
    background: linear-gradient(180deg, var(--accent-line), rgba(var(--accent-rgb), 0.5), var(--accent-line));
  }

  .sy-chain__steps::after {
    display: none;
  }

  .sy-chain li {
    grid-template-columns: 64px minmax(0, 1fr);
    justify-items: start;
    gap: 2px 16px;
    padding: 0;
    text-align: left;
  }

  .sy-chain__node {
    grid-row: 1 / span 3;
    margin: 0;
  }

  .sy-chain__text {
    max-width: none;
  }
}

@media (prefers-reduced-motion: no-preference) {
  .sy-chain__steps::after {
    animation: sy-run 7.5s linear infinite;
  }

  .sy-chain__node {
    animation: sy-node 7.5s ease-in-out infinite;
    animation-delay: calc(var(--i) * 1.5s);
  }

  @media (max-width: 900px) {
    .sy-chain__node {
      animation-duration: 7.5s;
    }
  }
}

@keyframes sy-run {
  0% { left: 10%; opacity: 0; }
  2% { opacity: 1; }
  80% { left: 90%; opacity: 1; }
  84% { left: 90%; opacity: 0; }
  100% { left: 10%; opacity: 0; }
}

@keyframes sy-node {
  0%, 20%, 100% {
    border-color: var(--accent-line);
    box-shadow: 0 0 0 6px var(--surface);
    transform: none;
  }
  3%, 16% {
    border-color: var(--accent);
    box-shadow: 0 0 0 6px var(--surface), 0 0 26px -2px rgba(var(--accent-rgb), 0.7);
    transform: scale(1.1);
  }
}

/* --- Module (Automatisierung) -------------------------------------------- */
.sy-mod {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(22px, 4vw, 56px);
  align-items: center;
  margin-top: clamp(26px, 3.4vw, 40px);
  padding: clamp(22px, 3.2vw, 40px);
  border: 1px solid var(--accent-line);
  border-radius: var(--r-lg);
  background: radial-gradient(90% 130% at 0% 0%, rgba(var(--accent-rgb), 0.1), transparent 60%), var(--surface);
}

.sy-mod--flows {
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

.sy-mod--flows .sy-mod__text {
  max-width: 62ch;
}

.sy-mod__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
}

.sy-mod h3 {
  margin-top: 8px;
  font-family: var(--font-display);
  font-size: clamp(22px, 2.5vw, 28px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.sy-mod__text p:not(.sy-mod__no) {
  margin-top: 12px;
  color: var(--text-secondary);
}

.sy-mod__more {
  font-size: 14px;
  color: var(--text-muted) !important;
}

@media (max-width: 900px) {
  .sy-mod,
  .sy-mod--flows {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* --- Nabe: Systems in der Mitte -------------------------------------------- */
.sy-hub {
  position: relative;
  width: 100%;
  max-width: 720px;
  margin-inline: auto;
  aspect-ratio: 100 / 64;
}

.sy-hub__lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.sy-hub__wires line {
  stroke: rgba(var(--accent-rgb), 0.38);
  stroke-width: 0.35;
  stroke-dasharray: 1.2 1.4;
}

.sy-hub__dots circle {
  fill: var(--accent);
  filter: drop-shadow(0 0 1.2px var(--accent));
}

.sy-hub__core {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 3px;
  width: 22%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  border: 1px solid var(--accent);
  border-radius: 50%;
  background: radial-gradient(circle at 50% 35%, rgba(var(--accent-rgb), 0.28), rgba(var(--accent-rgb), 0.06) 70%), var(--surface);
  box-shadow: 0 0 40px -6px rgba(var(--accent-rgb), 0.6);
  text-align: center;
}

.sy-hub__core img {
  width: 34%;
  height: auto;
}

.sy-hub__core b {
  font-family: var(--font-display);
  font-size: clamp(10.5px, 1.4vw, 14px);
  font-weight: 600;
  line-height: 1.1;
}

.sy-hub__core::after {
  content: '';
  position: absolute;
  inset: -2px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  opacity: 0;
}

.sy-hub__node {
  position: absolute;
  top: var(--y);
  left: var(--x);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  max-width: 40%;
  padding: 7px 12px 7px 9px;
  transform: translate(-50%, -50%);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--surface-strong, #11151f);
  font-size: clamp(10.5px, 1.25vw, 13px);
  line-height: 1.2;
  color: var(--text);
  white-space: nowrap;
}

.sy-hub__node svg {
  flex: none;
  color: var(--accent);
}

.sy-hub__node > span {
  overflow: hidden;
  text-overflow: ellipsis;
}

@media (prefers-reduced-motion: no-preference) {
  .sy-hub__wires line {
    animation: sy-dash 2.4s linear infinite;
  }

  .sy-hub__core::after {
    animation: sy-ring 3.2s ease-out infinite;
  }
}

@keyframes sy-dash {
  to { stroke-dashoffset: -5.2; }
}

@keyframes sy-ring {
  0% { transform: scale(1); opacity: 0.7; }
  100% { transform: scale(1.6); opacity: 0; }
}

@media (max-width: 720px) {
  .sy-hub {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    aspect-ratio: auto;
  }

  .sy-hub__lines {
    display: none;
  }

  .sy-hub__core {
    position: relative;
    top: auto;
    left: auto;
    grid-column: 1 / -1;
    justify-self: center;
    width: 130px;
    margin-bottom: 6px;
    transform: none;
  }

  .sy-hub__core b {
    font-size: 14px;
  }

  .sy-hub__node {
    position: static;
    max-width: none;
    transform: none;
    font-size: 13px;
    white-space: normal;
  }
}

/* --- Abläufe -------------------------------------------------------------- */
.sy-flows {
  display: grid;
  gap: 14px;
}

.sy-flow {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.5fr);
  gap: 16px clamp(20px, 3vw, 36px);
  align-items: center;
  padding: 18px 22px;
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.025);
}

.sy-flow h4 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.sy-flow__text p {
  margin-top: 4px;
  font-size: 14px;
  color: var(--text-secondary);
}

.sy-flow__steps {
  display: grid;
  grid-template-columns: repeat(var(--n), minmax(0, 1fr));
  gap: 0 30px;
  list-style: none;
}

.sy-flow__steps li {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 10px 12px 12px;
  border: 1px solid var(--accent-line);
  border-radius: 14px;
  background: var(--surface-strong, #11151f);
  font-size: 13.5px;
  line-height: 1.3;
}

/* Verbindung zum nächsten Schritt */
.sy-flow__steps li:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 100%;
  width: 30px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-line), rgba(var(--accent-rgb), 0.55));
}

.sy-flow__steps li:not(:last-child)::before {
  content: '';
  position: absolute;
  top: calc(50% - 3px);
  left: calc(100% + 22px);
  width: 8px;
  height: 8px;
  border-top: 2px solid rgba(var(--accent-rgb), 0.7);
  border-right: 2px solid rgba(var(--accent-rgb), 0.7);
  transform: rotate(45deg);
}

.sy-flow__icon {
  display: grid;
  flex: none;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
}

@media (prefers-reduced-motion: no-preference) {
  .sy-flow__steps li {
    animation: sy-step calc(var(--n) * 1.4s + 1.4s) ease-in-out infinite;
    animation-delay: calc(var(--i) * 1.4s + var(--r) * 0.9s);
  }
}

@keyframes sy-step {
  0%, 30%, 100% {
    border-color: var(--accent-line);
    box-shadow: none;
    transform: none;
  }
  4%, 24% {
    border-color: var(--accent);
    box-shadow: 0 0 22px -4px rgba(var(--accent-rgb), 0.7);
    transform: translateY(-2px);
  }
}

@media (max-width: 900px) {
  .sy-flow {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 720px) {
  .sy-flow__steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px 0;
  }

  .sy-flow__steps li {
    flex-direction: row;
    align-items: center;
  }

  .sy-flow__steps li:not(:last-child)::after {
    top: 100%;
    left: 24px;
    width: 2px;
    height: 22px;
    background: linear-gradient(180deg, var(--accent-line), rgba(var(--accent-rgb), 0.55));
  }

  .sy-flow__steps li:not(:last-child)::before {
    top: calc(100% + 12px);
    left: 20px;
    transform: rotate(135deg);
  }
}