:root {
  --primary-color: #3273dc;
  --primary-color-rgb: 50, 115, 220;
  --secondary-color: #363636;
  --accent-color: #0a5eb2;
  --light-bg: #f5f5f5;
  --surface-color: #ffffff;
  --border-radius: 5px;
  --section-padding: 3rem 0;
}

html {
  scroll-behavior: auto;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #333;
  line-height: 1.6;
  padding-top: 0;
  background: #fff;
}

section {
  padding: var(--section-padding);
}

figure {
  margin: 0;
}

.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: 15px;
  padding-left: 15px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  margin-right: -15px;
  margin-left: -15px;
}

.col-12,
.col-lg-10,
.col-xl-11 {
  position: relative;
  width: 100%;
  padding-right: 15px;
  padding-left: 15px;
}

.card {
  position: relative;
}

.card-body {
  position: relative;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.375rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 0.25rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn-dark {
  background-color: #343a40;
  border-color: #343a40;
  color: #fff;
}

.btn-dark:hover {
  background-color: #23272b;
  border-color: #1d2124;
  color: #fff;
  text-decoration: none;
}

.img-fluid {
  display: block;
  max-width: 100%;
  height: auto;
}

.text-center {
  text-align: center;
}

.text-justify {
  text-align: justify;
}

.justify-content-center {
  justify-content: center;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.mx-2 {
  margin-left: 0.5rem;
  margin-right: 0.5rem;
}

.my-2 {
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.my-3 {
  margin-top: 1rem;
  margin-bottom: 1rem;
}

.mt-4 {
  margin-top: 1.5rem;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-3 {
  margin-bottom: 1rem;
}

.mb-4 {
  margin-bottom: 1.5rem;
}

.py-4 {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.py-5 {
  padding-top: 3rem;
  padding-bottom: 3rem;
}

h1,
h2,
h3,
h4,
h5 {
  color: var(--secondary-color);
  font-weight: 700;
}

h6 {
  color: var(--secondary-color);
  font-weight: 500;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s;
}

a:hover {
  color: var(--accent-color);
  text-decoration: none;
}

.hero-section {
  background: linear-gradient(135deg, #75a7c4 0%, #66ccff 45%, #00ffcc 100%);
  padding: 4rem 0;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
}

.project-title {
  margin: 0 0 1.5rem;
  font-size: clamp(2.1rem, 3.6vw, 2.5rem);
  line-height: 1.2;
}

.author-links {
  max-width: 70%;
  margin: 0 auto;
  text-align: center;
}

.author-links h5 {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  line-height: 1.6;
}

.author-links h6 {
  margin: 0;
  font-size: 1rem;
}

.author-links a {
  color: var(--secondary-color);
}

.author-links a:hover {
  color: var(--primary-color);
}

.hero-actions .btn {
  min-width: 0;
}

.hero-action-button {
  gap: 0.5rem;
  background-color: #343a40;
  border-color: #343a40;
}

.hero-action-button:hover {
  background-color: #23272b;
  border-color: #1d2124;
}

.button-label-prefix {
  display: inline-flex;
  align-items: center;
}

.hero-button-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.15rem;
  height: 1.15rem;
  flex: 0 0 auto;
}

.hero-button-icon svg {
  display: block;
  width: 100%;
  height: 100%;
}

.section-muted {
  background: var(--light-bg);
}

.bg-light {
  background: var(--light-bg);
}

.section-heading {
  margin-bottom: 1.5rem;
}

.section-heading h2 {
  margin: 0;
  font-size: 2rem;
}

.section-divider {
  height: 2px;
  margin: 1rem 0 0;
  background: linear-gradient(to right, transparent, var(--primary-color), transparent);
}

.content-card {
  border: none;
  border-radius: var(--border-radius);
  overflow: hidden;
  background: var(--surface-color);
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.content-card .card-body {
  padding: 1.25rem;
}

.shadow-sm {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.teaser-figure,
.signal-viewer-figure,
.pipeline-figure {
  border-radius: var(--border-radius);
  overflow: hidden;
  background: #fff;
}

.teaser-figure img,
.signal-viewer-image,
.pipeline-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.pipeline-caption {
  margin-top: 1rem;
  text-align: center;
  font-size: 0.98rem;
  line-height: 1.65;
  color: #555;
}

.signal-card .card-body {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
}

.signal-selector-switch {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin: 0 auto 1.5rem;
}

.signal-selector-button,
.signal-level-button {
  min-width: 138px;
  padding: 0.5rem 0.9rem;
  border: 1px solid rgba(var(--primary-color-rgb), 0.2);
  border-radius: 4px;
  background: #fff;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--secondary-color);
  cursor: pointer;
  transition: all 0.2s ease;
}

.signal-selector-button:hover,
.signal-level-button:hover {
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.signal-selector-button:focus-visible,
.signal-level-button:focus-visible,
.signal-nav:focus-visible,
.back-to-top:focus-visible {
  outline: 2px solid var(--secondary-color);
  outline-offset: 3px;
}

.signal-selector-button.is-active,
.signal-level-button.is-active {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: #fff;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.signal-viewer {
  width: 100%;
}

.signal-viewer-frame {
  position: relative;
  padding: 0 2.75rem;
}

.signal-nav {
  position: absolute;
  top: 50%;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.96);
  color: var(--secondary-color);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.14);
  cursor: pointer;
  transform: translateY(-50%);
}

.signal-nav span {
  font-size: 1.45rem;
  line-height: 1;
}

.signal-nav-prev {
  left: 0;
}

.signal-nav-next {
  right: 0;
}

.signal-viewer-meta {
  margin-top: 1.5rem;
  text-align: center;
}

.signal-viewer-kicker {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--primary-color);
}

.signal-viewer-title {
  margin: 0;
  font-size: clamp(1.35rem, 2.5vw, 1.65rem);
}

.signal-viewer-prefix,
.signal-viewer-title-value {
  font: inherit;
  color: inherit;
}

.signal-viewer-caption {
  margin: 0.45rem 0 0;
  font-size: 1.08rem;
  color: #555;
}

.signal-level-switch {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.bibtex-block {
  margin: 0;
  padding: 0;
  background: transparent;
  color: #212529;
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre;
  -webkit-overflow-scrolling: touch;
}

.bibtex-block code {
  display: block;
  min-width: max-content;
  color: inherit;
  font-family: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.project-footer {
  padding: 2.75rem 0;
  background: #111827;
  color: rgba(255, 255, 255, 0.74);
}

.footer-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.footer-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  padding: 10px 20px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.1);
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
}

.footer-btn:hover {
  background-color: var(--primary-color);
  color: #fff;
  text-decoration: none;
}

.icon-container {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.15);
}

.icon-container svg {
  display: block;
  width: 18px;
  height: 18px;
}

.footer-btn:hover .icon-container {
  background-color: rgba(255, 255, 255, 0.3);
}

.footer-note {
  max-width: 760px;
  margin: 0 auto;
  font-size: 0.95rem;
}

.back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: #fff;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  z-index: 1000;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

@media (min-width: 576px) {
  .container {
    max-width: 540px;
  }
}

@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 992px) {
  .container {
    max-width: 960px;
  }

  .col-lg-10 {
    width: 83.333333%;
  }
}

@media (min-width: 1200px) {
  .container {
    max-width: 1140px;
  }

  .col-xl-11 {
    width: 91.666667%;
  }
}

@media (max-width: 991.98px) {
  .hero-section {
    padding: 3.5rem 0;
  }

  .author-links {
    max-width: 85%;
  }

  .author-links h5 {
    font-size: 1.1rem;
  }
}

@media (max-width: 767.98px) {
  section {
    padding: 3.25rem 0;
  }

  .project-title {
    font-size: 2rem;
  }

  .author-links {
    max-width: 100%;
  }

  .hero-actions .btn {
    min-width: 126px;
  }

  .signal-selector-button,
  .signal-level-button {
    min-width: 124px;
    padding: 0.45rem 0.8rem;
  }

  .signal-viewer-frame {
    padding: 0;
  }

  .signal-nav {
    width: 40px;
    height: 40px;
  }

  .signal-nav-prev {
    left: 0.75rem;
  }

  .signal-nav-next {
    right: 0.75rem;
  }

  .bibtex-block {
    font-size: 0.9rem;
  }
}