@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600;700&family=Poppins:wght@500;600&display=swap');

.hz-wl-why,
.hz-wl-why * {
  box-sizing: border-box;
}

.hz-wl-why {
  --hz-orange: #ec682e;
  --hz-orange-soft: rgba(236, 104, 46, 0.12);
  --hz-navy: #071d33;
  --hz-blue: #0b2f4d;
  --hz-cyan: #39c6ff;
  --hz-green: #72d572;
  --hz-yellow: #ffd166;
  --hz-red: #ff6b4a;
  --hz-text: #4b5563;
  --hz-muted: #64748b;
  --hz-border: #e5e7eb;
  --hz-soft: #f7f9fc;
  --hz-white: #ffffff;

  width: 100%;
  overflow: hidden;
  background: #ffffff;
  color: var(--hz-text);
  font-family: 'Open Sans', Arial, sans-serif;
  line-height: 1.65;
}

.hz-wl-why h2,
.hz-wl-why h3,
.hz-wl-why p {
  margin: 0;
}

.hz-wl-why-section {
  padding: 86px 0;
  background: var(--hz-soft);
}

.hz-wl-why-container {
  max-width: 1380px;
  margin: 0 auto;
  padding: 0 40px;
}

.hz-wl-why-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  color: var(--hz-orange);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1.8px;
  text-transform: uppercase;
}

.hz-wl-why-eyebrow::before {
  content: "";
  width: 38px;
  height: 2px;
  background: var(--hz-orange);
  display: inline-block;
}

.hz-wl-why-title {
  max-width: 1080px;
  margin-bottom: 18px;
  color: var(--hz-navy);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 44px;
  line-height: 1.18;
  font-weight: 500;
  letter-spacing: -1px;
}

.hz-wl-why-desc {
  max-width: 1100px;
  color: var(--hz-text);
  font-size: 17px;
  line-height: 1.8;
}

/* Main layout */
.hz-wl-why-main {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 32px;
  margin-top: 44px;
  align-items: stretch;
}

/* Dark visual panel */
.hz-wl-why-visual {
  position: relative;
  min-height: 500px;
  padding: 34px;
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(circle at 88% 14%, rgba(236, 104, 46, 0.24), transparent 34%),
    linear-gradient(135deg, #071d33 0%, #0b2f4d 100%);
  box-shadow: 0 24px 64px rgba(7, 29, 51, 0.16);
}

.hz-wl-why-visual h3 {
  max-width: 520px;
  color: #ffffff;
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 30px;
  line-height: 1.25;
  font-weight: 500;
}

.hz-wl-why-visual p {
  max-width: 540px;
  margin-top: 14px;
  color: rgba(255, 255, 255, 0.74);
  font-size: 15.5px;
  line-height: 1.75;
}

/* Animated leak demo */
.hz-wl-leak-demo {
  position: absolute;
  left: 34px;
  right: 34px;
  bottom: 34px;
  height: 270px;
  border-radius: 24px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.13);
  overflow: hidden;
}

/* pipeline */
.hz-wl-pipe {
  position: absolute;
  left: 46px;
  right: 46px;
  top: 122px;
  height: 18px;
  border-radius: 999px;
  background: linear-gradient(180deg, #d7e3ec 0%, #7d8c98 100%);
  box-shadow: inset 0 -4px 8px rgba(0,0,0,0.24);
}

.hz-wl-valve {
  position: absolute;
  left: 52%;
  top: 81px;
  width: 72px;
  height: 72px;
  transform: translateX(-50%);
  border-radius: 50%;
  border: 8px solid #d7e3ec;
  background: rgba(7, 29, 51, 0.6);
  box-shadow: 0 0 20px rgba(255,255,255,0.18);
  z-index: 4;
}

.hz-wl-valve::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -44px;
  width: 8px;
  height: 44px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: #d7e3ec;
}

.hz-wl-valve::after {
  content: "";
  position: absolute;
  left: 50%;
  top: -58px;
  width: 76px;
  height: 12px;
  transform: translateX(-50%);
  border-radius: 999px;
  background: #d7e3ec;
}

/* leak source */
.hz-wl-leak-point {
  position: absolute;
  left: 62%;
  top: 118px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--hz-orange);
  box-shadow: 0 0 22px rgba(236,104,46,0.9);
  z-index: 6;
  animation: hz-wl-leak-point 1.5s ease-in-out infinite;
}

@keyframes hz-wl-leak-point {
  0%, 100% {
    transform: scale(0.85);
    opacity: 0.65;
  }
  50% {
    transform: scale(1.3);
    opacity: 1;
  }
}

/* gas plume */
.hz-wl-gas {
  position: absolute;
  left: 62%;
  top: 44px;
  width: 180px;
  height: 126px;
  transform: translateX(-12%);
  z-index: 3;
}

.hz-wl-gas span {
  position: absolute;
  border-radius: 50%;
  background: rgba(236, 104, 46, 0.16);
  border: 1px solid rgba(236, 104, 46, 0.26);
  animation: hz-wl-gas-float 2.8s ease-in-out infinite;
}

.hz-wl-gas span:nth-child(1) {
  left: 8px;
  top: 56px;
  width: 34px;
  height: 34px;
  animation-delay: 0s;
}

.hz-wl-gas span:nth-child(2) {
  left: 48px;
  top: 34px;
  width: 48px;
  height: 48px;
  animation-delay: 0.25s;
}

.hz-wl-gas span:nth-child(3) {
  left: 102px;
  top: 12px;
  width: 62px;
  height: 62px;
  animation-delay: 0.5s;
}

@keyframes hz-wl-gas-float {
  0%, 100% {
    transform: translate(0, 12px) scale(0.9);
    opacity: 0.22;
  }
  50% {
    transform: translate(10px, -8px) scale(1.08);
    opacity: 0.82;
  }
}

/* acoustic waves */
.hz-wl-acoustic-wave {
  position: absolute;
  left: 62%;
  top: 125px;
  width: 38px;
  height: 38px;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  border: 2px solid rgba(57, 198, 255, 0.6);
  opacity: 0;
  z-index: 5;
  animation: hz-wl-wave 2.4s ease-out infinite;
}

.hz-wl-acoustic-wave.w2 {
  animation-delay: 0.55s;
}

.hz-wl-acoustic-wave.w3 {
  animation-delay: 1.1s;
}

@keyframes hz-wl-wave {
  0% {
    width: 30px;
    height: 30px;
    opacity: 0.86;
  }
  100% {
    width: 220px;
    height: 220px;
    opacity: 0;
  }
}

/* sensor */
.hz-wl-sensor {
  position: absolute;
  left: 44px;
  top: 56px;
  width: 88px;
  height: 88px;
  border-radius: 50%;
  background: linear-gradient(180deg, #ffffff 0%, #d7e3ec 100%);
  box-shadow: 0 18px 38px rgba(0,0,0,0.28);
  z-index: 7;
}

.hz-wl-sensor::before {
  content: "9 MEMS";
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%,-50%);
  color: var(--hz-navy);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.hz-wl-sensor::after {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  border: 1px dashed rgba(7, 29, 51, 0.32);
}

/* signal line */
.hz-wl-signal-line {
  position: absolute;
  left: 126px;
  right: 74px;
  top: 96px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(57,198,255,0.0), rgba(57,198,255,0.85), rgba(57,198,255,0.0));
  overflow: hidden;
  z-index: 2;
}

.hz-wl-signal-line::after {
  content: "";
  position: absolute;
  left: -40%;
  top: 0;
  width: 40%;
  height: 100%;
  background: #ffffff;
  box-shadow: 0 0 14px rgba(255,255,255,0.9);
  animation: hz-wl-signal-move 2s linear infinite;
}

@keyframes hz-wl-signal-move {
  from {
    left: -40%;
  }
  to {
    left: 100%;
  }
}

/* AI chip */
.hz-wl-ai-box {
  position: absolute;
  left: 34px;
  right: 34px;
  bottom: 22px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  z-index: 8;
}

.hz-wl-ai-kpi {
  padding: 13px 12px;
  border-radius: 15px;
  background: rgba(7, 29, 51, 0.68);
  border: 1px solid rgba(255,255,255,0.12);
}

.hz-wl-ai-kpi strong {
  display: block;
  margin-bottom: 3px;
  color: #ffffff;
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
}

.hz-wl-ai-kpi span {
  display: block;
  color: rgba(255,255,255,0.62);
  font-size: 11.5px;
  line-height: 1.35;
}

/* Cards */
.hz-wl-why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.hz-wl-why-card {
  position: relative;
  min-height: 228px;
  padding: 28px;
  border-radius: 22px;
  background: #ffffff;
  border: 1px solid var(--hz-border);
  box-shadow: 0 14px 34px rgba(7, 29, 51, 0.045);
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.hz-wl-why-card:hover {
  transform: translateY(-6px);
  border-color: rgba(236, 104, 46, 0.35);
  box-shadow: 0 22px 52px rgba(7, 29, 51, 0.1);
}

.hz-wl-why-card span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  margin-bottom: 18px;
  border-radius: 15px;
  background: var(--hz-orange-soft);
  color: var(--hz-orange);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 13px;
  font-weight: 600;
}

.hz-wl-why-card h3 {
  margin-bottom: 10px;
  color: var(--hz-navy);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 21px;
  line-height: 1.32;
  font-weight: 500;
}

.hz-wl-why-card p {
  color: var(--hz-text);
  font-size: 15px;
  line-height: 1.7;
}

.hz-wl-why-note {
  margin-top: 32px;
  padding: 26px 30px;
  border-radius: 22px;
  background: #ffffff;
  border: 1px solid var(--hz-border);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  box-shadow: 0 14px 34px rgba(7, 29, 51, 0.045);
}

.hz-wl-why-note h3 {
  margin-bottom: 8px;
  color: var(--hz-navy);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 22px;
  font-weight: 500;
}

.hz-wl-why-note p {
  color: var(--hz-muted);
  font-size: 15px;
  line-height: 1.65;
}

.hz-wl-why-note-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--hz-orange-soft);
  color: var(--hz-orange);
  font-family: 'Poppins', Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
}

@media (max-width: 1180px) {
  .hz-wl-why-main {
    grid-template-columns: 1fr;
  }

  .hz-wl-why-title {
    font-size: 38px;
  }

  .hz-wl-why-visual {
    min-height: 520px;
  }
}

@media (max-width: 768px) {
  .hz-wl-why-container {
    padding: 0 22px;
  }

  .hz-wl-why-section {
    padding: 62px 0;
  }

  .hz-wl-why-title {
    font-size: 30px;
    letter-spacing: -0.7px;
  }

  .hz-wl-why-desc {
    font-size: 16px;
  }

  .hz-wl-why-main {
    margin-top: 34px;
  }

  .hz-wl-why-visual {
    min-height: 640px;
    padding: 26px 22px;
  }

  .hz-wl-why-visual h3 {
    font-size: 26px;
  }

  .hz-wl-leak-demo {
    left: 22px;
    right: 22px;
    height: 360px;
  }

  .hz-wl-sensor {
    left: 24px;
    top: 54px;
    width: 76px;
    height: 76px;
  }

  .hz-wl-signal-line {
    left: 104px;
    right: 32px;
  }

  .hz-wl-ai-box {
    grid-template-columns: 1fr 1fr;
    left: 18px;
    right: 18px;
  }

  .hz-wl-why-grid {
    grid-template-columns: 1fr;
  }

  .hz-wl-why-card {
    min-height: auto;
  }

  .hz-wl-why-note {
    grid-template-columns: 1fr;
    padding: 24px 22px;
  }

  .hz-wl-why-note-badge {
    width: 100%;
  }
}