/* =================================================================================================
   CSS Custom Properties (Variables)
   ================================================================================================= */
:root {
  --animation-duration: 1.1s;
  /* Main animation duration - change this to control all animation speeds */
  --intro-fade-duration: 0.5s;
  /* Fixed duration for intro fade */
  --form-show-duration: 0.8s;
  /* Fixed duration for form appearance */
}

/* =================================================================================================
   Page Section Components
   ================================================================================================= */

/* Research Studies Section */
.Research-studies {
  margin-top: 80px;
}

.Research-studies__additional {
  display: flex;
  gap: 40px;
  margin-top: 80px;
}

/* Image Text Block Component */
.image-text-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-areas: "text image";
  gap: 80px;
  align-items: center;
  margin-top: 120px;
}

.image-text-block--reverted {
  grid-template-areas: "image text";
}

.image-text-block__texts {
  grid-area: text;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.image-text-block__image {
  grid-area: image;
}

.image-text-block__text-button {
  width: fit-content;
}

/* Application Form Section */
.participation-application-section {
  margin-top: 80px;
  background: linear-gradient(to right, #d9ead9, #fae7dc);
  padding: 60px 40px;
  border-radius: 20px;
  text-align: center;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  min-height: 200px;
  /* Fixed starting height for smooth animation */
  position: relative;
  /* For proper positioning of animated elements */
  overflow: hidden;
  /* Prevent content jumping during animation */
  /* JavaScript controls height animation - no CSS transition needed */
}

.participation-application-section.expanding {
  min-height: 750px;
  /* Target height for final state */
}

.participation-application-section .section-content {
  position: relative;
  width: 100%;
}

/* Apply for Participation Card */
.Apply-for-Participation {
  margin-top: 80px;
  border-radius: var(--R-medium, 24px);
  background: linear-gradient(90deg,
      var(--Brand-Green, rgba(73, 131, 79, 0.18)) 0%,
      var(--Brand-Orange, rgba(242, 153, 74, 0.18)) 100%), var(--Background-Default, #fff);
}

.Apply-for-Participation__card {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 60px 40px;
  gap: 32px;
}

.Apply-for-Participation__card-text {
  max-width: 720px;
  margin-bottom: 24px;
  text-align: center;
}

/* Researches Grid Section */
.Researches {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 32px;
  margin: 80px 0;
}

.Researches-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 32px;
  gap: 24px;
  border: 1px solid var(--capti-color--outline-medium);
  border-radius: 24px;
}

.Researches-card__content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.Researches-card__text {
  color: var(--capti-color--text-secondary);
}

.Researches-card__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.Researches-card__author {
  display: flex;
  align-items: center;
  gap: 16px;
}

.Researches-card__author-icon {
  width: 36px;
  height: 36px;
}

/* =================================================================================================
   Form Animation Components
   ================================================================================================= */

/* Base Hidden Class */
.hidden {
  display: none;
}

/* Intro Section Animation */
#intro {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  position: relative;
  width: 100%;
  opacity: 1;
  transform: translateY(0);
  transition:
    opacity var(--intro-fade-duration) ease-out,
    transform var(--intro-fade-duration) ease-out;
}

#intro.hiding {
  opacity: 0;
  transform: translateY(-20px);
  pointer-events: none;
  /* Keep in document flow during animation */
  position: relative;
  width: 100%;
}

#intro.hidden {
  opacity: 0;
  transform: translateY(-30px);
  pointer-events: none;
  /* When hidden, take it out of the document flow completely */
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  height: 0;
  min-height: 0;
  overflow: hidden;
  /* Specific override for animated elements */
  display: block !important;
}

/* Form Container Animation */
#formContainer {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  width: 100%;
  opacity: 0;
  transform: translateY(40px);
  max-height: 0;
  overflow: hidden;
  transition:
    opacity var(--form-show-duration) ease-out,
    transform var(--form-show-duration) ease-out,
    max-height var(--form-show-duration) ease-out;
}

#formContainer.showing {
  opacity: 1;
  transform: translateY(0);
  max-height: 1000px;
  /* Large enough to accommodate form */
}

#formContainer.hidden {
  opacity: 0;
  transform: translateY(40px);
  max-height: 0;
}

/* Legacy support for direct class removal */
#formContainer:not(.hidden):not(.showing) {
  opacity: 0;
  transform: translateY(40px);
  max-height: 0;
}

#formContainer h2.h3 {
  margin-bottom: 12px;
}

/* Form Success Message */
.form-success {
  margin-top: 32px;
  padding: 40px;
  background-color: rgba(73, 131, 79, 0.1);
  border: 2px solid rgba(73, 131, 79, 0.3);
  border-radius: 16px;
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.4s ease-out,
    transform 0.4s ease-out;
}

.form-success.showing {
  opacity: 1;
  transform: translateY(0);
}

.form-success__title {
  margin-bottom: 16px;
  font-size: 32px;
  line-height: 40px;
  font-weight: 700;
  color: var(--capti-color--text-primary, #000);
}

.form-success__message {
  margin: 0;
  color: var(--capti-color--text-secondary, #666);
}

/* =================================================================================================
   Responsive Design - Mobile First Approach
   ================================================================================================= */

/* Small Tablets and Mobile Landscape (600px and below) */
@media (max-width: 600px) {
  .Research-studies {
    margin-top: 40px;
  }

  .Research-studies__additional {
    flex-direction: column;
    gap: 16px;
    margin-top: 40px;
  }

  .image-text-block {
    grid-template-columns: 1fr;
    grid-template-areas:
      "text"
      "image";
    gap: 24px;
    margin: 40px 0;
  }

  .image-text-block--last {
    margin-bottom: 40px;
  }

  .Researches {
    grid-template-columns: 1fr;
    gap: 10px;
    margin: 40px 0;
  }

  .Researches-card__content {
    gap: 16px;
  }
}

/* Mobile Portrait (600px - 518px) */
@media (max-width: 600px) and (min-width: 518px) {
  .Apply-for-Participation {
    margin: 0 -16px;
    border-radius: 0;
    width: unset;
  }

  .participation-application-section {
    padding: 40px 20px;
  }

  #intro.hidden {
    width: calc(100% - 40px);
    /* Account for mobile padding */
  }

  #intro {
    min-height: 100px;
    /* Smaller minimum height on mobile */
  }
}

/* Small Mobile (517px and below) */
@media (max-width: 517px) {
  .Apply-for-Participation {
    margin: 0 -16px;
    border-radius: 0;
    width: unset;
    min-height: auto;
    /* Allow natural height expansion */
  }

  .participation-application-section {
    padding: 30px 16px 50px;
    /* Extra bottom padding to prevent form cutoff */
  }

  .participation-application-section.expanding {
    min-height: 1000px;
    /* Larger minimum height for mobile to accommodate form */
    height: auto !important;
    /* Override JS inline styles to allow natural expansion */
  }

  #intro.hidden {
    width: calc(100% - 32px);
    /* Account for mobile padding (16px * 2) */
  }

  #intro {
    min-height: 80px;
    /* Smaller minimum height on very small screens */
  }

  #formContainer {
    max-width: 100%;
    /* Full width on very small screens */
  }

  #formContainer.showing {
    max-height: 1200px;
    /* Extra height for small screens and larger max-height for mobile forms */
    padding-bottom: 20px;
    /* Extra space at bottom */
  }

  .form-success {
    margin-bottom: 20px;
    /* Ensure success message has space */
  }
}

/* Large Tablets (800px and below) */
@media (max-width: 800px) {
  .Researches {
    grid-template-columns: 1fr;
  }
}

/* =================================================================================================
   Accessibility - Reduced Motion Support
   ================================================================================================= */
@media (prefers-reduced-motion: reduce) {

  .participation-application-section,
  .participation-application-section.expanding,
  #intro,
  #intro.hiding,
  #intro.hidden,
  #formContainer,
  #formContainer.showing,
  #formContainer.hidden,
  #formContainer:not(.hidden):not(.showing),
  .form-success {
    transition: none;
    transform: none;
  }
}