@charset "UTF-8";
/* PDCA Cycle Section */
.pdca-section {
  position: relative;
  padding: 100px 0;
  overflow: hidden;
  background: linear-gradient(135deg, #f8f9fa 0%, #fff 100%);
}

.pdca-section::before {
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  pointer-events: none;
  content: "";
  background: radial-gradient(circle, rgba(179, 27, 27, 0.03) 0%, transparent 70%);
  border-radius: 50%;
}

/* PDCA Cycle in Business Section (index.html) */
.business-section .pdca-cycle {
  margin-top: 80px;
  margin-bottom: 80px;
}

.pdca-cycle {
  position: relative;
  display: grid;
  grid-template-rows: 1fr 1fr;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  max-width: 1000px;
  min-height: 950px;
  padding: 40px;
  padding-top: 80px;
  margin: 80px auto 0;
}

/* Center Circle */
.pdca-center {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 200px;
  min-width: 200px;
  height: 200px;
  min-height: 200px;
  aspect-ratio: 1/1;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-color) 0%, #8B1515 100%);
  border-radius: 50%;
  box-shadow: 0 20px 60px rgba(179, 27, 27, 0.3);
  transform: translate(-50%, -50%);
  animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 20px 60px rgba(179, 27, 27, 0.3);
  }
  50% {
    box-shadow: 0 25px 70px rgba(179, 27, 27, 0.5);
  }
}
.pdca-center-icon {
  margin-bottom: 15px;
}

.pdca-center-icon svg {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
  stroke: white;
}

.pdca-center h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
  letter-spacing: 0.02em;
}

/* PDCA Cards */
.pdca-card {
  position: relative;
  padding: 35px 30px;
  background: #fff;
  border: 2px solid transparent;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Position Cards */
.pdca-plan {
  grid-row: 1;
  grid-column: 1;
  align-self: start;
}

.pdca-do {
  grid-row: 1;
  grid-column: 2;
  align-self: start;
}

.pdca-check {
  grid-row: 2;
  grid-column: 2;
  align-self: end;
}

.pdca-act {
  grid-row: 2;
  grid-column: 1;
  align-self: end;
}

/* Letter Badge */
.pdca-letter {
  position: absolute;
  top: -15px;
  right: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  font-family: "Inter", sans-serif;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--accent-color) 0%, #8B1515 100%);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(179, 27, 27, 0.4);
}

.pdca-card h3 {
  margin-bottom: 8px;
  font-family: "Inter", sans-serif;
  font-size: 28px;
  font-weight: 700;
  color: #1a1a1a;
}

.pdca-content h4 {
  margin-bottom: 18px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--accent-color);
}

.pdca-content ul {
  padding: 0;
  margin: 0;
  list-style: none;
}

.pdca-content ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: #4a4a4a;
}

.pdca-content ul li::before {
  position: absolute;
  top: 7px;
  left: 0;
  font-size: 8px;
  color: var(--accent-color);
  content: "●";
}

/* Arrows */
.pdca-arrow {
  position: absolute;
  z-index: 5;
}

/* Arrow 1: Plan to Do (top row, left to right) */
.pdca-arrow-1 {
  top: 26%;
  left: 50%;
  transform: translateX(-50%);
}

.pdca-arrow-1::after {
  top: -5px;
  right: -8px;
  border-color: transparent transparent transparent var(--accent-color);
  border-width: 6px 0 6px 10px;
}

/* Arrow 2: Do to Check (right side, downward) */
.pdca-arrow-2 {
  top: 48%;
  right: 25%;
  transform: rotate(90deg);
}

.pdca-arrow-2::after {
  top: -5px;
  right: -8px;
  border-color: transparent transparent transparent var(--accent-color);
  border-width: 6px 0 6px 10px;
}

/* Arrow 3: Check to Act (bottom row, right to left) */
.pdca-arrow-3 {
  bottom: 24%;
  left: 50%;
  transform: translateX(-50%) rotate(180deg);
}

.pdca-arrow-3::after {
  top: -5px;
  right: -8px;
  border-color: transparent transparent transparent var(--accent-color);
  border-width: 6px 0 6px 10px;
}

/* Arrow 4: Act to Plan (left side, upward) */
.pdca-arrow-4 {
  top: 48%;
  left: 25%;
  transform: rotate(-90deg);
}

.pdca-arrow-4::after {
  top: -5px;
  right: -8px;
  border-color: transparent transparent transparent var(--accent-color);
  border-width: 6px 0 6px 10px;
}

/* Tablet Styles */
@media (max-width: 968px) {
  .pdca-section {
    padding: 80px 0;
  }
  .pdca-cycle {
    gap: 40px;
    min-height: 900px;
    padding: 30px 20px;
  }
  .pdca-center {
    width: 180px;
    min-width: 180px;
    height: 180px;
    min-height: 180px;
    aspect-ratio: 1/1;
  }
  .pdca-center h3 {
    font-size: 20px;
  }
  .pdca-card {
    padding: 30px 25px;
  }
  .pdca-card h3 {
    font-size: 24px;
  }
  .pdca-content h4 {
    font-size: 15px;
  }
  .pdca-content ul li {
    font-size: 13px;
  }
}
/* Mobile Styles */
@media (max-width: 640px) {
  .pdca-section {
    padding: 60px 0;
  }
  .pdca-cycle {
    display: flex;
    flex-direction: column;
    gap: 30px;
    align-items: center;
    min-height: auto;
    padding: 20px;
  }
  .pdca-center {
    position: relative;
    top: auto;
    left: auto;
    width: 160px;
    min-width: 160px;
    height: 160px;
    min-height: 160px;
    aspect-ratio: 1/1;
    margin: 0 auto 40px;
    transform: none;
  }
  .pdca-center h3 {
    font-size: 18px;
  }
  .pdca-card {
    width: 100%;
    padding: 25px 20px;
  }
  .pdca-card h3 {
    font-size: 22px;
  }
  .pdca-letter {
    top: -12px;
    right: 20px;
    width: 45px;
    height: 45px;
    font-size: 22px;
  }
  .pdca-content h4 {
    font-size: 14px;
  }
  .pdca-content ul li {
    margin-bottom: 8px;
    font-size: 13px;
  }
  /* Hide arrows on mobile */
  .pdca-arrow {
    display: none;
  }
  /* Order cards for mobile flow */
  .pdca-plan {
    order: 1;
  }
  .pdca-do {
    order: 2;
  }
  .pdca-check {
    order: 3;
  }
  .pdca-act {
    order: 4;
  }
}
@media (max-width: 480px) {
  .pdca-section {
    padding: 50px 0;
  }
  .pdca-center {
    width: 140px;
    min-width: 140px;
    height: 140px;
    min-height: 140px;
    aspect-ratio: 1/1;
    margin-bottom: 30px;
  }
  .pdca-center-icon svg {
    width: 36px;
    height: 36px;
  }
  .pdca-center h3 {
    font-size: 16px;
  }
  .pdca-card {
    padding: 20px 18px;
  }
  .pdca-card h3 {
    font-size: 20px;
  }
  .pdca-letter {
    top: -10px;
    right: 15px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  .pdca-content h4 {
    margin-bottom: 15px;
    font-size: 13px;
  }
  .pdca-content ul li {
    padding-left: 18px;
    font-size: 12px;
  }
}