/* ========================
   Core Expertise Section - Flush Accordion
   Mobile-First Approach
   ======================== */

.core-expertise-section .section-header {
  margin-bottom: var(--space-16);
  text-align: center;
  gap: var(--space-14);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.core-expertise-section .section-description {
  max-width: 57.5rem;
  margin: 0 auto;
  text-align: center;
}

/* ========================
   Flush Accordion Styling - Mobile Base
   ======================== */

.accordion-expertise {
  border: none;
  gap: var(--space-5);
  display: flex;
  flex-direction: column;
  max-width: 100%;
  margin: 0 auto;
}

.accordion-expertise.accordion-flush {
  border: none;
}

.accordion-expertise .accordion-item {
  background-color: transparent;
  border: none;
  margin-bottom: 0;
  border-radius: 0;
  overflow: visible;
}

.accordion-expertise .accordion-header {
  padding: 0;
  background-color: transparent;
  border: none;
}

.accordion-expertise .accordion-button {
  background-color: var(--bs-primary-800);
  border: none;
  border-bottom: 0.0625rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  border-radius: 0;
  color: var(--bs-primary-25);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  padding-left: 0;
  padding-top: var(--space-4);
  padding-right: var(--space-8);
  padding-bottom: var(--space-8);
  min-height: 4.375rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all 0.3s ease;
  width: 100%;
}

.accordion-expertise .accordion-button:not(.collapsed) {
  background-color: var(--bs-primary-800);
  box-shadow: none;
  color: var(--bs-primary-25);
  border-radius: 0;
}

.accordion-expertise .accordion-button:focus {
  border-bottom: 0.0625rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  box-shadow: none;
  background-color: var(--bs-primary-800);
  color: var(--bs-primary-25);
}

.accordion-expertise .accordion-button.collapsed {
  background-color: var(--bs-primary-800);
  color: var(--bs-primary-25);
  border-radius: 0;
}

.accordion-button-content {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  width: 100%;
  justify-content: flex-start;
}

.accordion-icon {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.accordion-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.accordion-title-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
}

.accordion-title {
  margin: 0;
  color: var(--bs-primary-50);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: 1.2;
}

/* Accordion Toggle Icon - Plus/Cross in Circle */
.accordion-expertise .accordion-button::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3e%3ccircle cx='12' cy='12' r='11' fill='none' stroke='%2318b38b' stroke-width='1.5'/%3e%3cpath d='M12 8v8M8 12h8' stroke='%2318b38b' stroke-width='2' stroke-linecap='round'/%3e%3c/svg%3e");
  background-size: 1.5rem;
  width: 1.5rem;
  height: 1.5rem;
  margin-left: auto;
  flex-shrink: 0;
  background-repeat: no-repeat;
  background-position: center;
}

.accordion-expertise .accordion-button:not(.collapsed)::after {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3e%3ccircle cx='12' cy='12' r='11' fill='none' stroke='%2318b38b' stroke-width='1.5'/%3e%3cpath d='M8 8l8 8M16 8l-8 8' stroke='%2318b38b' stroke-width='2' stroke-linecap='round'/%3e%3c/svg%3e");
}

.accordion-expertise .accordion-collapse {
  border: none;
}

.accordion-expertise .accordion-body {
  background-color: var(--bs-primary-900);
  border: none;
  border-radius: 0;
  padding: var(--space-6) var(--space-10);
  gap: var(--space-6);
  color: var(--bs-primary-25);
  display: flex;
  flex-direction: column;
  border-bottom-left-radius: var(--radius-lg);
  border-bottom-right-radius: var(--radius-lg);
}

/* ========================
   Accordion Body Content - Mobile Base
   ======================== */

.expertise-description-section {
  margin: 0;
  padding: 0;
  border: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.expertise-description {
  margin: 0;
  color: var(--bs-primary-25);
  font-size: var(--font-size-base);
  line-height: 1.4;
}

/* Capability Section */
.capability-section {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.capability-tagline {
  margin: 0;
  padding: 0;
  color: var(--bs-success);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-family: "IBM Plex Mono", monospace;
}

.capability-blocks-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  width: 100%;
}

.capability-block-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding-top: var(--space-3);
  border-top: 0.03125rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  flex: 1;
  min-width: 0;
}

.block-number {
  color: var(--bs-primary-50);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-normal);
  line-height: 1;
}

.block-description {
  color: var(--bs-primary-50);
  font-size: var(--font-size-xs);
  line-height: 1.4;
  margin: 0;
}

.capability-subtitle {
  margin: 0;
  color: var(--bs-primary-25);
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

/* Image Section */
.capability-image-section {
  margin: 0;
  padding: 0;
  width: 100%;
  border-radius: var(--radius-base);
}

.capability-image-section img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* Description Blocks Section */
.description-blocks-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  padding: 0;
  border: none;
  width: 100%;
}

.description-block-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: 0;
  border: none;
  flex: 1;
  min-width: 0;
}

.description-block-title {
  margin: 0;
  padding: 0;
  color: var(--bs-success);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  font-family: var(--font-family-mono);
  min-height: auto;
}

.description-block-content {
  padding-top: var(--space-3);
  border-top: 0.03125rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.description-block-text {
  margin: 0;
  padding: 0;
  color: var(--bs-primary-25);
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

/* ========================
   RESPONSIVE DESIGN
   ======================== */

/* Small devices (landscape phones, 576px and up) */
@media (min-width: 576px) {
  .core-expertise-section .section-header {
    margin-bottom: var(--space-18);
  }

  .accordion-expertise {
    gap: var(--space-5);
    max-width: 100%;
  }

  .accordion-expertise .accordion-button {
    padding-top: var(--space-5);
    padding-right: var(--space-10);
    padding-bottom: var(--space-10);
    min-height: 5rem;
    font-size: var(--font-size-2xl);
  }

  .accordion-button-content {
    gap: var(--space-10);
  }

  .accordion-icon {
    width: 2.75rem;
    height: 2.75rem;
  }

  .accordion-title {
    font-size: var(--font-size-2xl);
  }

  .accordion-expertise .accordion-button::after {
    background-size: 1.75rem;
    width: 1.75rem;
    height: 1.75rem;
  }

  .accordion-expertise .accordion-body {
    padding: var(--space-8) var(--space-12);
    gap: var(--space-8);
  }

  .expertise-description-section {
    gap: var(--space-4);
  }

  .capability-section {
    gap: var(--space-8);
  }

  .capability-tagline {
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
  }

  .capability-blocks-grid {
    flex-direction: row;
    gap: var(--space-2);
  }

  .capability-block-item {
    gap: var(--space-4);
    padding-top: var(--space-4);
    border-top: 0.03125rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  }

  .block-number {
    font-size: var(--font-size-2xl);
  }

  .block-description {
    font-size: var(--font-size-sm);
  }

  .capability-subtitle {
    font-size: var(--font-size-sm);
  }

  .description-blocks-section {
    flex-direction: column;
    gap: var(--space-8);
  }

  .description-block-wrapper {
    gap: var(--space-4);
  }

  .description-block-title {
    font-size: var(--font-size-xs);
    min-height: auto;
  }

  .description-block-content {
    gap: var(--space-3);
    padding-top: var(--space-3);
  }

  .description-block-text {
    font-size: var(--font-size-sm);
  }
}

/* Medium devices (tablets, 768px and up) */
@media (min-width: 768px) {
  .core-expertise-section .section-header {
    margin-bottom: var(--space-20);
  }

  .accordion-expertise {
    gap: var(--space-5);
    max-width: 100%;
  }

  .accordion-expertise .accordion-button {
    padding-top: var(--space-6);
    padding-right: var(--space-11);
    padding-bottom: var(--space-11);
    min-height: 5.5rem;
    font-size: var(--font-size-2xl);
  }

  .accordion-button-content {
    gap: var(--space-11);
  }

  .accordion-icon {
    width: 3rem;
    height: 3rem;
  }

  .accordion-title {
    font-size: var(--font-size-2xl);
  }

  .accordion-expertise .accordion-button::after {
    background-size: 1.875rem;
    width: 1.875rem;
    height: 1.875rem;
  }

  .accordion-expertise .accordion-body {
    padding: var(--space-11) var(--space-18);
    gap: var(--space-11);
    border-bottom-left-radius: var(--radius-2xl);
    border-bottom-right-radius: var(--radius-2xl);
  }

  .expertise-description-section {
    gap: var(--space-6);
  }

  .capability-section {
    gap: var(--space-11);
  }

  .capability-tagline {
    font-size: var(--font-size-sm);
  }

  .capability-blocks-grid {
    gap: var(--space-3);
  }

  .capability-block-item {
    gap: var(--space-6);
    padding-top: var(--space-6);
    border-top: 0.0625rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  }

  .block-number {
    font-size: var(--font-size-2xl);
  }

  .block-description {
    font-size: var(--font-size-base);
  }

  .capability-subtitle {
    font-size: var(--font-size-base);
  }

  .capability-image-section {
    border-radius: var(--radius-lg);
  }

  .description-blocks-section {
    flex-direction: row;
    gap: var(--space-6);
  }

  .description-block-wrapper {
    gap: var(--space-6);
  }

  .description-block-title {
    font-size: var(--font-size-sm);
    min-height: var(--space-12);
  }

  .description-block-content {
    gap: var(--space-4);
    padding-top: var(--space-4);
  }

  .description-block-text {
    font-size: var(--font-size-base);
  }
}

/* Large devices (desktops, 992px and up) */
@media (min-width: 992px) {
  .core-expertise-section .section-header {
    margin-bottom: var(--space-22);
  }

  .accordion-expertise {
    gap: var(--space-7);
    max-width: 59.375rem;
  }

  .accordion-expertise .accordion-button {
    padding-top: var(--space-7);
    padding-right: var(--space-13);
    padding-bottom: var(--space-13);
    min-height: 5.9375rem;
    font-size: var(--font-size-3xl);
  }

  .accordion-button-content {
    gap: var(--space-13);
  }

  .accordion-icon {
    width: 3.25rem;
    height: 3.25rem;
  }

  .accordion-title {
    font-size: var(--font-size-3xl);
  }

  .accordion-expertise .accordion-button::after {
    background-size: 2rem;
    width: 2rem;
    height: 2rem;
  }

  .accordion-expertise .accordion-body {
    padding: var(--space-13) var(--space-21);
    gap: var(--space-12);
    border-bottom-left-radius: var(--radius-2xl);
    border-bottom-right-radius: var(--radius-2xl);
  }

  .expertise-description-section {
    gap: var(--space-6);
  }

  .capability-section {
    gap: var(--space-13);
  }

  .capability-tagline {
    font-size: var(--font-size-sm);
  }

  .capability-blocks-grid {
    justify-content: flex-start;
    gap: var(--space-4);
  }

  .capability-block-item {
    gap: var(--space-7);
    padding-top: var(--space-7);
    border-top: 0.0625rem solid rgba(var(--bs-primary-100-rgb), 0.5);
  }

  .block-number {
    font-size: var(--font-size-3xl);
  }

  .block-description {
    font-size: var(--font-size-base);
  }

  .capability-subtitle {
    font-size: var(--font-size-base);
  }

  .capability-image-section {
    border-radius: var(--radius-lg);
  }

  .description-blocks-section {
    justify-content: space-between;
    gap: var(--space-7);
  }

  .description-block-wrapper {
    gap: var(--space-7);
  }

  .description-block-title {
    font-size: var(--font-size-sm);
    min-height: var(--space-15);
  }

  .description-block-content {
    gap: var(--space-5);
    padding-top: var(--space-4);
  }

  .description-block-text {
    font-size: var(--font-size-base);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  .accordion-expertise .accordion-button,
  .accordion-expertise .accordion-collapse {
    transition: none;
  }
}