:root {
  --green-dark: #004e3b;
  --green-mid: #036f4c;
  --green-mint: #05965d;
  --green-light: #34c67d;

  --blue-soft: #0a6970;
  --blue-deep: #044549;

  --white: #ffffff;
  --white-rgb: 255, 255, 255;
  --text-dark: #212529;

  --hero-gradient: linear-gradient(
    180deg,
    var(--blue-soft) 0%,
    #0d5663 30%,
    #137a52 60%,
    var(--green-dark) 120%
  );

  --container-max: 1350px;
  --container-padding: 3.5rem;
  --radius-md: 18px;
  --radius-lg: 28px;

  --transition: 0.28s ease;

  --section-header-size: 1.75rem;
  --section-text-size: 1.3rem;
  --list-text-size: 1.3rem;
  --list-title-size: 1.35rem;
  --nav-sticky-offset: 3.5rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-sticky-offset);
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  font-size: 1.1rem;
  line-height: 1.6;
  background-color: #fff;
  color: var(--text-dark);
}

a {
  overflow-wrap: break-word;
  word-wrap: break-word;
}

img,
video,
svg {
  max-width: 100%;
  height: auto;
}

main {
  width: 100%;
}

.container,
.section-container {
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

.section-container {
  padding-top: 2rem;
  padding-bottom: 2rem;
  scroll-margin-top: var(--nav-sticky-offset);
}

footer {
  width: 100%;
  background-color: var(--green-dark);
  padding-top: 2rem;
  padding-bottom: 2rem;
}

footer p {
  margin: 0;
  color: var(--white);
  font-size: 1.1rem;
  line-height: 1.6;
  text-align: center;
}


.section-header {
  font-size: var(--section-header-size);
  font-weight: 500;
  color: #181716;
  margin: 0 0 1rem;
  padding-bottom: 0.12rem;
  border-bottom: 0.12rem solid var(--green-mint);
  opacity: 0.8;
}

.section-subheader {
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text-dark);
  margin: 1.5rem 0 0.75rem;
}

.section-text {
  font-size: var(--section-text-size);
  line-height: 1.6;
  color: #333;
  margin: 0;
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.section-text + .section-text {
  margin-top: 1rem;
}

.section-text em,
.section-text .text-italic {
  font-style: italic;
}

.default-link {
  color: var(--green-mint);
  text-decoration: none;
  transition: color var(--transition);
}

.default-link:hover {
  color: var(--green-dark);
}


.mt-10 { margin-top: 0.625rem; }
.mt-15 { margin-top: 0.9375rem; }
.mt-20 { margin-top: 1.25rem; }
.mt-30 { margin-top: 1.875rem; }

.mb-10 { margin-bottom: 0.625rem; }
.mb-15 { margin-bottom: 0.9375rem; }
.mb-20 { margin-bottom: 1.25rem; }
.mb-30 { margin-bottom: 1.875rem; }

.pt-15 { padding-top: 0.9375rem; }
.pt-30 { padding-top: 1.875rem; }
.pl-30 { padding-left: 1.875rem; }

.custom-list,
.venue-list {
  list-style: none;
  margin: 0;
  padding-left: 0;
}

.custom-list.pl-30,
.venue-list.pl-30 {
  padding-left: 1.875rem;
}

.section-text + .custom-list,
.section-text + .venue-list,
.list-title + .custom-list,
.list-title + .venue-list {
  margin-top: 1rem;
}

.custom-list li,
.venue-list li {
  position: relative;
  padding-left: 1rem;
  margin-bottom: 0.5rem;
  font-size: var(--list-text-size);
  line-height: 1.6;
  display: flex;
  align-items: center;
}

.venue-list li {
  padding-left: 1.5rem;
  margin-bottom: 0.75rem;
}

.custom-list li::before,
.venue-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.8em;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-top: 4px solid transparent;
  border-bottom: 4px solid transparent;
  border-left: 6px solid var(--blue-soft);
}

.venue-list li::before {
  border-top-width: 5px;
  border-bottom-width: 5px;
  border-left-width: 8px;
}

.custom-list .default-link {
  display: inline-block;
  width: fit-content;
  font-size: var(--list-text-size);
  text-decoration: none;
  color: var(--green-mint);
  padding: 0.3125rem 0;
  transition: color var(--transition);
}

.custom-list .default-link:hover {
  color: var(--green-dark);
}

.registration-btn-container,
.submission-btn-container {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 100%;
}

.custom-btn {
  display: inline-block;
  background-color: var(--green-mint);
  color: var(--white);
  padding: 0.8rem 2rem;
  font-family: inherit;
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1.4;
  border-radius: 6px;
  border: none;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  width: 250px;
  max-width: 100%;
  transition:
    background-color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.registration-btn-container .custom-btn,
.submission-btn-container .custom-btn {
  width: 100%;
  max-width: 100%;
}

.custom-btn:hover:not(:disabled) {
  background-color: var(--green-mid);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 79, 59, 0.2);
}

button.custom-btn:disabled,
.custom-btn.is-disabled {
  opacity: 0.7;
  cursor: not-allowed;
  background-color: var(--green-light);
  pointer-events: none;
}


.marquee-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 1.5rem;
  gap: 4rem;
}

#partners .partners-marquee {
  display: block;
  overflow: hidden;
}

#partners .partners-marquee:first-of-type {
  margin-top: 1.5rem;
}

#partners .partners-marquee + .partners-marquee {
  margin-top: 3rem;
}

#partners .marquee-container a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 180px;
  height: auto;
}

.info-partner-card {
  width: 180px;
  height: auto;
  object-fit: contain;
  border-radius: 8px;
  flex-shrink: 0;
}

@media (max-width: 992px) {
  :root {
    --container-padding: 2rem;
    --section-header-size: 1.5rem;
    --section-text-size: 1.15rem;
    --list-text-size: 1.15rem;
    --list-title-size: 1.2rem;
  }

  #partners .marquee-container a {
    width: 180px;
    height: 80px;
  }

  #partners .partners-marquee + .partners-marquee {
    margin-top: 2.5rem;
  }

  .info-partner-card {
    width: 180px;
    height: auto;
    /* object-fit: contain;
    flex-shrink: 0; */
  }

  .marquee-container {
    gap: 3rem;
  }
}


.organizer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px 20px;
  justify-items: center;
  align-items: start;
  width: 100%;
  margin-top: 1.5rem;
}

.organizer-item {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px 8px;
  background-color: transparent;
  border-radius: 8px;
  transition: transform 0.3s ease;
  width: 100%;
  max-width: 100%;
  min-width: 0;
}

.organizer-item:hover {
  transform: translateY(-5px);
}

.organizer-logo-wrapper {
  width: 100%;
  height: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
}

.organizer-logo-wrapper img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}

.organizer-item a img {
  max-width: 100%;
  max-height: 170px;
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 6%;
  margin-bottom: 0;
}

.organizer-name {
  margin: 0;
  display: flex;
  align-items: flex-start;
}

.organizer-name a {
  display: block;
  color: var(--green-mint);
  text-decoration: none;
  font-size: 0.95rem;
  line-height: 1.35;
  padding: 0 4px;
  transition: color 0.2s ease;
  width: 100%;
}

.organizer-name a:hover {
  color: var(--green-dark);
}

.submission-grid-container {
  display: grid;
  grid-template-columns: 1fr max-content;
  gap: 2rem;
  align-items: start;
  width: 100%;
  margin-top: 1.5rem;
}


.proceedings-springer-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  margin-top: 1rem;
}

.proceedings-springer-container .section-text {
  flex: 1 1 280px;
  margin: 0;
}

.springer-logo {
  flex: 0 0 auto;
}

.springer-link {
  display: inline-block;
  transition: opacity var(--transition);
}

.springer-link:hover {
  opacity: 0.7;
}

.publication-logo {
  width: 220px;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}


.venue-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 1.5rem;
  align-items: start;
}

.venue-info {
  display: flex;
  flex-direction: column;
}

.venue-address {
  margin-top: 1rem;
  padding: 15px;
  background-color: #f7fafc;
  border-left: 4px solid var(--green-mint);
  border-radius: 4px;
}

.venue-address .section-text {
  margin: 0;
}

.venue-address-label {
  font-weight: 500;
  color: var(--green-dark);
}

.venue-map {
  width: 100%;
  height: 450px;
  border-radius: 8px;
  overflow: hidden;
}

.venue-map iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}


.past-events-list {
  margin-top: 0.9375rem;
}

.past-events-list p {
  margin: 0 0 0.9rem;
  font-size: var(--section-text-size);
  line-height: 1.6;
}

.past-event-link {
  color: var(--green-mint);
  text-decoration: none;
  transition: color var(--transition);
}

.past-event-link:hover {
  color: var(--green-dark);
}

/* ——— Contact ——— */

#contact {
  padding-bottom: 5rem;
}

.contact-wrapper {
  display: flex;
  padding: 1.5rem 0 0;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  flex-grow: 1;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.contact-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(5, 150, 93, 0.1);
  border-radius: 50%;
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-icon svg {
  width: 18px;
  height: 18px;
}

.contact-link {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--green-mint);
  text-decoration: none;
  font-size: 1rem;
  line-height: 1.4;
  transition: color 0.3s ease;
}

.contact-link:hover {
  color: var(--green-dark);
}

.contact-label {
  font-weight: 500;
  color: var(--green-dark);
  flex-shrink: 0;
}


@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
    --nav-sticky-offset: 1rem;
  }

  .section-header {
    margin-bottom: 0.75rem;
  }

  #partners .marquee-container {
    gap: 1.5rem;
  }

  #partners .marquee-container a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 120px;
    height: 56px;
    flex-shrink: 0;
    padding: 2px;
  }

  #partners .marquee-container a img,
  #partners .info-partner-card {
    display: block;
    width: auto !important;
    max-width: 100% !important;
    height: auto !important;
    max-height: 100% !important;
    object-fit: contain;
    scale: 1 !important;
    transform: none !important;
  }

  #partners .partners-marquee:first-of-type {
    margin-top: 1rem;
  }

  #partners .partners-marquee + .partners-marquee {
    margin-top: 2rem;
  }

  .organizer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 16px;
  }

  .organizer-logo-wrapper {
    height: 150px;
  }

  .organizer-item a img {
    max-height: 150px;
  }

  .submission-grid-container {
    grid-template-columns: 1fr;
  }

  .proceedings-springer-container {
    flex-direction: column;
    align-items: center;
  }

  .publication-logo {
    width: 180px;
  }

  .venue-container {
    grid-template-columns: 1fr;
  }

  .venue-map {
    height: 300px;
  }

  .past-events-list p {
    font-size: 1.05rem;
  }

  .contact-details {
    width: 100%;
  }

  .contact-item {
    gap: 1rem;
  }

  .contact-link {
    font-size: 0.95rem;
  }

  .custom-list li,
  .venue-list li {
    font-size: 1.05rem;
  }

  .registration-btn-container,
  .submission-btn-container {
    justify-content: stretch;
  }

  .registration-btn-container .custom-btn,
  .submission-btn-container .custom-btn,
  .custom-btn {
    width: 100%;
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  #partners .marquee-container {
    gap: 1.25rem;
  }

  #partners .marquee-container a {
    width: 120px;
    height: 110px;
  }

  .proceedings-springer-container .section-text {
    flex: 0;
  }

  .organizer-grid {
    grid-template-columns: repeat(1, 1fr);
    gap: 20px;
  }

  .organizer-logo-wrapper {
    height: 140px;
  }

  .organizer-item a img {
    max-height: 140px;
  }

  .contact-item {
    gap: 0.75rem;
  }

  .contact-icon {
    width: 32px;
    height: 32px;
  }

  .contact-icon svg {
    width: 16px;
    height: 16px;
  }

  .contact-link {
    font-size: 0.9rem;
    gap: 0.25rem;
  }

  .contact-label {
    display: block;
    width: 100%;
    margin-bottom: 2px;
  }
}