/* Tünel / köprü - anasayfa mühendislik vitrini */

.tb-section {
  padding: 70px 0;
  font-family: inherit;
  color: #1f261d;
}

.tb-section .tb-container {
  max-width: 1180px;
  margin: 0 auto;
}

.tb-heading {
  max-width: 760px;
  margin: 0 auto 55px;
  text-align: center;
}

.tb-eyebrow {
  display: inline-block;
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 12px;
  letter-spacing: 1.8px;
  text-transform: uppercase;
  color: #59634f;
  margin-bottom: 12px;
  font-weight: 500;
}

.tb-heading h2 {
  font-family: "El Messiri", serif;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.08;
  margin: 0 0 18px;
  color: #162014;
  font-weight: 600;
}

.tb-heading p {
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.75;
  color: #5f6758;
  margin: 0;
  font-weight: 400;
}

.tb-showcase {
  display: grid;
  grid-template-columns: 1fr 1.15fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.tb-card {
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(35, 45, 30, 0.12);
  padding: 34px 30px;
  border-radius: 4px;
  min-height: 430px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tb-card-dark {
  background: #1f281f;
  color: #fff;
}

.tb-card h3 {
  font-family: "El Messiri", serif;
  font-size: clamp(22px, 2.5vw, 26px);
  font-weight: 600;
  margin: 0 0 14px;
}

.tb-card p {
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.75;
  color: inherit;
  opacity: 0.88;
  margin: 0 0 24px;
}

.tb-card-dark p {
  opacity: 0.9;
}

.tb-card ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

.tb-card li {
  font-family: "Outfit", system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.6;
  padding: 10px 0 10px 24px;
  position: relative;
  border-top: 1px solid rgba(120, 130, 105, 0.18);
}

.tb-card li::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #7c8a63;
  position: absolute;
  left: 0;
  top: 17px;
}

.tb-card-dark li {
  border-top-color: rgba(255, 255, 255, 0.15);
}

.tb-card-dark li::before {
  background: rgba(200, 212, 180, 0.95);
}

.tb-icon {
  width: 54px;
  height: 54px;
  border: 1px solid rgba(120, 130, 105, 0.35);
  border-radius: 50%;
  margin-bottom: 24px;
  position: relative;
  color: #3b4537;
}

.tb-card-dark .tb-icon {
  border-color: rgba(255, 255, 255, 0.28);
  color: rgba(255, 255, 255, 0.92);
}

.tb-icon span {
  display: block;
  position: absolute;
  inset: 0;
}

.tb-icon span::before,
.tb-icon span::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
}

.tb-icon span::before {
  top: 23px;
  height: 14px;
  border-radius: 22px 22px 0 0;
  border: 1px solid currentColor;
  border-bottom: none;
}

.tb-icon span::after {
  top: 31px;
  height: 1px;
  background: currentColor;
  border: 0;
  opacity: 0.55;
}

.tb-icon-bridge span::before {
  top: 29px;
  height: 1px;
  border: 0;
  background: currentColor;
  opacity: 0.95;
}

.tb-icon-bridge span::after {
  top: 20px;
  height: 24px;
  border-left: 1px solid currentColor;
  border-right: 1px solid currentColor;
  border-top: 0;
  border-bottom: 0;
  background: transparent;
  opacity: 0.95;
}

.tb-visual {
  background: #edf1eb;
  border: 1px solid rgba(35, 45, 30, 0.1);
  border-radius: 4px;
  overflow: hidden;
}

.tb-visual-img {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 992px) {
  .tb-showcase {
    grid-template-columns: 1fr;
  }

  .tb-card,
  .tb-visual {
    min-height: auto;
  }

  .tb-section {
    padding: 70px 0;
  }
}

@media (max-width: 576px) {
  .tb-section {
    padding: 56px 0;
  }

  .tb-card {
    padding: 28px 22px;
  }

  .tb-heading {
    margin-bottom: 40px;
  }
}