:root {
  --max-width: 1100px;
}

html {
  font-size: 120%;
}

.site-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  justify-self: end;
}

.site-shortcut {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1.15rem;
  border-radius: 999px;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-light);
  background: var(--color-primary);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

/* Ensure buttons with site-shortcut style don't have a default border */
.site-shortcut:is(button) {
  border: none;
  cursor: pointer;
}

/* Style for the "Copy Email" button after copying */
.site-shortcut.copied {
  background: var(--color-light) !important;
  color: var(--color-primary) !important;
}


.site-home-link {
  color: inherit;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.site-footer {
  padding: 1.25rem 1.5rem;
  color: var(--color-mid);
  font-size: 0.9rem;
  margin-top: auto;
}

@media (max-width: 640px) {
  .site-header {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .site-header-actions { justify-self: start; }
}

.footer-ref {
  color: var(--color-primary);
  text-decoration:none;
}

/* Base layout */
body {
  font-family: "Manrope", "IBM Plex Sans", sans-serif;
  font-size: 1rem;
  font-weight: 400;
  margin: 0;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  color: var(--color-dark);
  line-height: 1.4;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--color-light);
  border-bottom: 1px solid var(--color-primary);
}

.site-title {
  margin: 0;
  font-size: 18px;
  line-height: 1;
}

.site-title picture {
  display: inline-flex;
  line-height: 0;
}

.site-name-logo {
  display: inline-block;
  height: 80px !important;
  width: auto !important;
  max-height: 80px;
  max-width: none;
}

.site-title-pipe {
  align-self: center;
  font-weight: 400;
  line-height: 1;
}

.site-title-tagline {
  font-size: 1em;
  font-weight: 400;
  line-height: 1;
}

/* Use this to make a button larger - this is usually used outwith the navigation bar */
.make-button-large {
  /* keep the pill/button visuals from .site-shortcut by using both classes */
  font-size: 2.5rem !important;
  padding: 1rem 1.6rem !important;
  border-radius: 999px !important;
  font-weight: 600 !important;
  line-height: 1 !important;
}

.container {
  max-width: var(--max-width);
  margin: 20px auto;
  padding: 0 16px;
}

/* Dark button variant used across the site to indicate during development that the link is wrong */
.btn-broken {
  background: #000 !important;
  color: var(--color-mid) !important;
  pointer-events: none !important;
  user-select: none !important;
}

/* Responsive tweaks */
@media (max-width: 640px) {
  /* Stack header elements */
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .site-name-logo {
    height: 32px !important;
    max-height: 32px;
  }


  /* Form controls full-width on small screens */
  input[type="text"],
  input[type="number"],
  input[type="file"],
  textarea,
  select {
    width: 100%;
    padding: 10px;
    font-size: 16px;
    box-sizing: border-box;
    margin-bottom: 8px;
  }

}

@media (max-width: 420px) {
  body {
    font-size: 1rem;
  }
}

/* use-case cards */
.use-case-section {
  background: var(--color-mid);
  padding: 5.5rem 2rem;
  text-align: center;
}

.use-case-section .section-header {
  max-width: 960px;
  margin: 0 auto 3rem;
}

.use-case-section .section-subtitle {
  max-width: 48ch;
  margin: 0 auto;
}


.use-case-column {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.use-case-card {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  min-height: min(72vh, 740px);
  background: var(--color-dark);
  border: 1px solid var(--color-primary);
  border-radius: 22px;
  transition: all 0.3s ease;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  text-align: left;
}

.use-case-card:hover {
  transform: scale(1.05);
  border-color: var(--color-accent);
}

.use-case-card-plot {
  background: var(--color-dark);
  border-right: 1px solid var(--color-primary);
  padding: 1rem;
  display: grid;
  place-items: center;
  text-align: center;
}

/* When plot is on the right, move divider to the left side of the plot panel. */
.use-case-card-copy + .use-case-card-plot {
  border-right: none;
  border-left: 1px solid var(--color-primary);
}

.use-case-card:hover .use-case-card-plot {
  border-right-color: var(--color-accent);
}

.use-case-card:hover .use-case-card-copy + .use-case-card-plot {
  border-left-color: var(--color-accent);
}

.use-case-placeholder-logo {
  display: block;
  margin: 0 auto;
  width: min(70%, 360px);
  height: auto;
}

.use-case-card-copy {
  min-width: 0;
  padding: clamp(1.25rem, 2.4vw, 2.4rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.9rem;
}

.use-case-card-copy h3 {
  margin: 0;
  color: var(--color-light);
  font-size: clamp(1.45rem, 2.1vw, 2rem);
}

.use-case-card-copy p {
  margin: 0;
  color: var(--color-light);
  font-size: clamp(1rem, 1.2vw, 1.15rem);
  line-height: 1.7;
  max-width: 44ch;
}

@media (max-width: 900px) {
  .use-case-card {
    min-height: 68vh;
    grid-template-columns: 1fr;
    grid-template-rows: 46% 54%;
  }

  .use-case-card-plot {
    border-right: none;
    border-left: none;
    border-bottom: 1px solid var(--color-primary);
  }

  .use-case-card:hover .use-case-card-plot {
    border-bottom-color: var(--color-accent);
  }
}

/* Responsive header menu: hamburger + popup nav for small screens */
.menu-toggle {
  display: none; /* shown on small screens */
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.35rem;
  margin-left: 0.5rem;
}
.hamburger {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  position: relative;
}
.hamburger::before, .hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
}
.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

@media (max-width: 640px) {
  /* hide desktop actions and show toggle */
  .site-header-actions { display: none !important; }
  .menu-toggle { display: inline-block; align-self: flex-end; }

  /* when nav is visible (JS toggles hidden/class) show as popup */
  .site-header-actions.show,
  .site-header-actions[aria-hidden="false"] {
    display: flex !important;
    flex-direction: column;
    position: absolute;
    right: 1rem;
    top: 64px; /* adjust to sit below header */
    background: var(--color-light);
    padding: 0.5rem;
    border-radius: 8px;
    z-index: 100;
    min-width: 160px;
  }
  /* Make nav links appear as plain text inside the small-screen dropdown
     — override any "button" or pill styles used on desktop (e.g. .site-shortcut)
     Text size and color are inherited from the header; remove borders and
     disable transform/transition so items do not move when hovered. */
  .site-header-actions a {
    padding: 0.5rem 0.75rem;
    display: block;
    background: transparent;
    border: none;
    border-radius: 0;
    box-shadow: none;
    color: inherit;       /* inherit text colour from header */
    font-size: inherit;   /* inherit text size */
    text-decoration: none;
    font-weight: inherit;
  }

  /* Specific overrides for elements that may carry desktop button classes.
     Keep spacing but strip button visuals and animations inside the dropdown. */
  .site-header-actions .site-shortcut,
  .site-header-actions {
    background: var(--color-primary) !important;
    box-shadow: none !important;
    padding: 0.5rem 0.75rem !important; /* keep spacing but not button visuals */
    border: none !important;
    border-radius: 0 !important;
    color: inherit !important;
    display: block !important;
  }

  /* Remove the browser focus ring (visual border) inside the dropdown but
     preserve an accessible focus indicator for keyboard users via underline. */
  .site-header-actions a:focus,
  .site-header-actions a:focus-visible {
    outline: none !important;
    box-shadow: none !important;
  }
  .site-header-actions a:focus-visible {
    text-decoration: underline;
  }
}

.team-section {
  background: var(--color-mid);
  padding: 6rem 2rem;
  text-align: center;
}

.team-card,
.capability-card,
.application-card,
.technology-card,
.mode-card,
.use-case-card,
.solver-container .metric-card {
  background: var(--color-dark);
  border: 1px solid var(--color-primary);
  border-radius: 20px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.team-card:hover,
.capability-card:hover,
.application-card:hover,
.technology-card:hover,
.use-case-card:hover,
.solver-container .metric-card:hover,
.mode-card:hover {
  transform: scale(1.05);
  border-color: var(--color-accent);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

@media (max-width: 860px) {
  .team-grid {
    grid-template-columns: 1fr;
  }
}

.team-card {
  text-align: center;
  padding: 2rem;
}

a.team-card {
  text-decoration: none;
  color: inherit;
  display: block;
}

.team-avatar {
  width: 200px;
  height: 200px;
  border-radius: 10%;
  overflow: hidden;
  margin: 0 auto;
  flex-shrink: 0;
}

.team-avatar img {
  height: 100%;
  width: 100%;
  object-fit: cover;   /* fills the circle without stretching */
  object-position: center top;  /* focuses on the face area */
}
.team-name {
  font-size: 1.2rem;
  color: var(--color-light);
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.team-role {
  color: var(--color-primary);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  font-weight: 500;
}
.team-affiliation {
  color: var(--color-accent);
  font-size: 0.9rem;
  margin-bottom: 1rem;
  font-weight: 500;
}

.team-bio {
  color: var(--color-light);
  font-size: 0.9rem;
  line-height: 1.6;
}

.additional-team-section {
  margin-top: 4rem;
  display: flex;
  justify-content: center;
}

.additional-team-card {
  max-width: 800px;
  width: 100%;
}

.additional-team-title {
  font-size: 1.5rem;
  color: var(--color-accent);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.additional-team-list {
  list-style: none;
  padding: 0;
  color: var(--color-light);
  font-size: 1.1rem;
  line-height: 2;
  max-width: 800px;
  margin: 0 auto;
}

.additional-team-list .team-name,
.additional-team-list .team-affiliation,
.additional-team-list .team-role {
  display: inline;
  margin-bottom: 0;
}

.additional-team-link {
  text-decoration: none;
  color: inherit;
}

.additional-team-link:hover,
.additional-team-link:focus,
.additional-team-link:hover .team-name,
.additional-team-link:hover .team-affiliation,
.additional-team-link:hover .team-role,
.additional-team-link:focus .team-name,
.additional-team-link:focus .team-affiliation,
.additional-team-link:focus .team-role {
  color: var(--color-accent);
}

.applications-section {
  background: var(--color-mid);
  padding: 6rem 2rem;
  text-align: center;
}

/* Applications styles */
.applications-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 2.5rem;
  max-width: 1200px;
  margin: 0 auto;
}


.application-card {
  padding: 2.5rem;
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: visible;
  min-height: 520px;
}

.application-title {
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    font-weight: 600;
}

.application-desc {
    color: var(--color-light);
    line-height: 1.7;
    font-size: 0.95rem;
    /* let the description expand the card and flow naturally */
    flex: none;
    overflow: visible;
}

/* On small screens we often want natural page flow (no internal scrolling) */
@media (max-width: 640px) {
  /* remove forced min-height on small screens so cards flow naturally */
  .application-card { min-height: none; }
  .application-desc { overflow: visible; flex: none; }
}


/* Work with us Section */
.wwu-section {
    background: var(--color-accent);
    padding: 5rem 2rem;
    text-align: center;
}

.wwu-content h1 {
    font-size: 2.5rem;
    color: var(--color-dark);
    margin-bottom: 1rem;
    font-weight: 700;
}

.wwu-content p {
    color: var(--color-dark);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}
.wwu-content .wwu-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}
.wwu-content .copy-button-wrapper {
    position: relative;
    display: inline-block;
    vertical-align: middle; /* Aligns with other buttons */
}

.wwu-content .copy-feedback {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 0.5rem; /* Space above the button */
    background-color: var(--color-light);
    color: var(--color-dark);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s ease-out;
    pointer-events: none; /* Prevent interaction */
    z-index: 10;
}

.wwu-list {
    display: inline-block;
    text-align: left;
    list-style: none;
    padding: 0;
    margin-top: 0;
    margin-bottom: 2rem;
    color: var(--color-dark);
    font-size: 1.2rem;
    max-width: 600px;
}

.wwu-list li {
    position: relative;
    padding-left: 2.5rem; /* Space for the icon */
    margin-bottom: 0.75rem;
}

.wwu-list li::before {
    content: '→';
    position: absolute;
    left: 0;
}


.artiphy-hero {
  min-height: 90vh;
  background: radial-gradient(circle, #000 0%, var(--color-dark) 70%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  color: var(--color-light);
}

.hero-wordmark {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 2rem;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  color: var(--color-light);
  margin-bottom: 1.5rem;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  color: var(--color-light);
  margin-bottom: 2rem;
  line-height: 1.6;
  font-weight: 300;
}

.hero-cta {
  display: inline-flex;
  gap: 1rem;
  margin-top: 2rem;
}


.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    font-weight: 600;
}

.section-subtitle {
    color: var(--color-light);
    font-size: 2rem;
}


/* Introduction Section */
.intro-section {
    background: var(--color-mid);
    padding: 6rem 2rem;
    position: relative;
}

.intro-container {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.intro-text {
    font-size: 1.25rem;
    color: var(--color-light);
    line-height: 1.8;
    margin-bottom: 2rem;
}

.intro-highlight {
    color: var(--color-accent);
    font-weight: 600;
}

/* Capabilities Grid */
.capabilities-section {
    background: var(--color-dark);
    padding: 6rem 2rem;
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.capability-card {
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.capability-title {
    font-size: 1.3rem;
    color: var(--color-light);
    margin-bottom: 1rem;
    font-weight: 600;
}

.capability-desc {
    color: var(--color-light);
    line-height: 1.7;
    font-size: 0.95rem;
}


/* Technology Description */
.technologies-section {
    background:  var(--color-primary);
    padding: 5rem 2rem;
    text-align: center;
}

.technologies-content p {
    color: var(--color-light);
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.technologies-grid {
  display: grid;
  /* Force a 2-column layout so cards form a 2x2 grid when there are 4 items */
  grid-template-columns: repeat(2, 1fr);
  /* Make each row match height so cards align nicely */
  grid-auto-rows: 1fr;
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

/* Responsive: stack into a single column on narrow viewports */
@media (max-width: 768px) {
  .technologies-grid {
    grid-template-columns: 1fr;
  }
}

.technology-card {
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}


.technology-title {
    font-size: 1.3rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    font-weight: 600;
}

.technology-desc {
  color: var(--color-light);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Platform Section */
.platform-section {
  background: var(--color-mid);
  padding: 6rem 2rem;
}

.platform-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.platform-text h3 {
  font-size: 2rem;
  color: var(--color-light);
  margin-bottom: 1.5rem;
}

.platform-text p {
  color: var(--color-light);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.platform-features {
    list-style: none;
    padding: 0;
}

.platform-features li {
  color: var(--color-light);
    font-size: 1rem;
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.platform-features li::before {
    content: '→';
    position: absolute;
    left: 0;
}

.platform-visual {
    background: var(--color-dark);
    border-radius: 20px;
    padding: 3rem;
    border: 1px solid var(--color-primary);
    position: relative;
    overflow: hidden;
}

.platform-visual-title {
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.platform-visual-list {
  color: var(--color-light);
  font-size: 1rem;
  list-style: none;
  padding: 0;
  line-height: 2;
}

.platform-visual-list li {
  position: relative;
  padding-left: 1.25rem;
}

.platform-visual-list li::before {
  content: '→';
  position: absolute;
  left: 0;
}

.platform-visual-actions {
  margin-top: 2rem;
  padding-top: 2rem;
  position: center ;
}

/* Responsive */
@media (max-width: 768px) {
    .platform-content {
        grid-template-columns: 1fr;
    }
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
}

.mode-shell {
  flex: 1;
  padding: 4rem 1.5rem;
  background: radial-gradient(circle, #000 0%, var(--color-dark) 70%)
}

.mode-layout {
  max-width: 1120px;
  margin: 0 auto;
}

.mode-hero {
  max-width: 760px;
  margin: 0 auto 2rem;
  text-align: center;
}

.small-wordmark {
  display: block;
  width: 50%;
  max-width: 450px;
  height: auto;
  margin: 0 auto 1.5rem;
}


.mode-hero h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.05;
  color: var(--color-light);
}

.mode-hero p {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--color-light);
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.mode-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.75rem;
  backdrop-filter: blur(8px);
}

.mode-card-link {
  text-decoration: none;
  color: inherit;
}

.mode-card-link:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.mode-card h3 {
  margin: 0;
  font-size: 1.75rem;
  color: var(--color-light);
  text-align: center;
}

.mode-card p {
  margin: 0;
  color: var(--color-light);
  line-height: 1.6;
}

.mode-features {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--color-light);
  line-height: 1.8;
}

.mode-features li {
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.5rem;
}

.mode-features li::before {
  content: '→';
  position: absolute;
  left: 0;
}

.solver-container,
.solver-container * {
  box-sizing: border-box;
}

.solver-shell {
  --solver-plot-font-color: var(--color-light);
  --solver-plot-axis-tick-color: var(--color-light);
  --solver-plot-axis-title-color: var(--color-light);
  --solver-plot-axis-grid-color: var(--color-light);
  --solver-plot-axis-zero-color: var(--color-light);
  min-height: 100vh;
  background: radial-gradient(circle, #000 0%, var(--color-dark) 90%);
}

.solver-container {
  display: grid;
  grid-template-columns: minmax(480px, 560px) minmax(0, 1fr);
  min-height: 100vh;
  width: 100%;
  max-width: 1800px;
  margin: 0 auto;
}

/* LEFT PANEL - Fixed Form */
.solver-container .form-panel {
  background: #000;
  border-right: 1px solid var(--color-mid);
  padding: 2rem;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  backdrop-filter: blur(12px);
}

.solver-container .form-panel h2 {
  margin: 0 0 1.5rem 0;
  color: var(--color-light);
  font-size: 1.5rem;
  font-weight: 600;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--color-primary);
}

.solver-container .mode-pill {
  display: block;
  margin: -0.35rem 0 0.9rem;
  color: var(--color-light);
  font-size: 1.65rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: 0.015em;
}

.solver-container .mode-summary {
  margin: 0 0 1.2rem;
  color: var(--color-light);
  font-size: 0.92rem;
  line-height: 1.6;
}

.solver-container .mode-switch-link {
  display: inline-flex;
  margin-bottom: 1.35rem;
  color: var(--color-accent);
  font-size: 0.88rem;
  font-weight: 600;
  text-decoration: none;
}

.solver-container .form-panel .form-group {
  margin-bottom: 1.25rem;
}

.solver-container .form-panel .section-title {
  margin: 1.75rem 0 0.9rem;
  padding-bottom: 0.45rem;
  border-bottom: var(--color-accent);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}


.solver-container .preset-section .section-title {
  font-size: 2rem;
  color: var(--color-accent);
  letter-spacing: 0.03em;
}

.solver-container .form-panel label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-light);
  margin-bottom: 0.5rem;
}

.solver-container .preset-section label {
  font-size: 1.08rem;
  font-weight: 600;
}

.solver-container .form-panel input[type="text"],
.solver-container .form-panel input[type="number"],
.solver-container .form-panel input[type="file"],
.solver-container .form-panel select {
  width: 100%;
  padding: 0.625rem 0.875rem;
  /* border-radius: 0.5rem; */
  border-color: transparent ;
  font-size: 0.875rem;
  transition: all 0.2s;
  background: var(--color-dark);
  color: var(--color-light);
  font-family: inherit;
}

.solver-container .form-panel input[type="range"] {
  width: 100%;
  padding: 0;
  border: none;
  background: transparent;
  accent-color: var(--color-accent);
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

/* Track / rail */
.solver-container .form-panel input[type="range"]::-webkit-slider-runnable-track {
  height: 4px;
  border-radius: 2px;
  background: var(--color-primary);
}
.solver-container .form-panel input[type="range"]::-moz-range-track {
  height: 4px;
  border-radius: 2px;
  background: var(--color-primary);
}

/* Thumb */
.solver-container .form-panel input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-light);
  margin-top: -6px; /* centres thumb on the track */
  border: none;
}
.solver-container .form-panel input[type="range"]::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-light);
  border: none;
}

.solver-container .slider-value {
  margin-top: 0.35rem;
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
}

.solver-container .form-panel select option {
  font-family: inherit;
}

.solver-container .form-panel .preset-section select,
.solver-container .form-panel .preset-section select#id_preset {
  font-size: 1.35rem;
  line-height: 1.25;
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}

.solver-container .form-panel input:focus,
.solver-container .form-panel select:focus {
  outline: none;
  border-color: var(--color-accent);
}

.solver-container .form-panel input::placeholder {
  color: var(--color-primary);
}

.solver-container .preset-section #id_preset option {
  font-size: 1.35rem;
}

.solver-container .preset-description {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--color-dark);
  border-radius: 0.5rem;
  color: var(--color-light);
  font-size: 0.85rem;
}

.solver-container .preset-description a,
.solver-container .preset-description a:visited {
  color: var(--color-primary);
  text-decoration: underline;
}
.solver-container .params-unlocked-indicator {
  display: none;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.35rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--color-accent);
  border-radius: 0.5rem;
  background: var(--color-dark);
  color: var(--color-light);
  font-size: 0.82rem;
  font-weight: 700;
}

.solver-container .params-locked-indicator {
  display: none;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.35rem;
  padding: 0.45rem 0.65rem;
  border: 1px solid var(--color-mid);
  border-radius: 0.5rem;
  background: var(--color-dark);
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
}

.solver-container #params-sections {
  transition: opacity 0.3s ease;
}

.solver-container #params-sections.params-locked {
  opacity: 0.45;
}

.solver-container .preset-values-list {
  display: grid;
  gap: 0.35rem;
}

.solver-container .preset-value-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.2rem 0;
}

.solver-container .preset-value-label {
  color: var(--color-light);
  font-size: 0.9rem;
}

.solver-container .preset-value-number {
  color: var(--color-light) ;
  font-weight: 700;
  font-size: 0.9rem;
  white-space: nowrap;
}

.solver-container .params-locked .param-input input,
.solver-container .params-locked .param-input select,
.solver-container .params-locked .param-input textarea {
  background: var(--color-dark);
  color: var(--color-light);
  border-color: var(--color-mid);
  pointer-events: none;
  cursor: not-allowed;
}

.solver-container .params-locked .param-input input[type="range"]::-webkit-slider-runnable-track {
  background: var(--color-dark);
}
.solver-container .params-locked .param-input input[type="range"]::-moz-range-track {
  background: var(--color-dark);
}

.solver-container .checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin: 1.5rem 0;
  padding: 0.75rem;
  background: var(--color-dark);
  border-radius: 0.5rem;
  border: 1px solid var(--color-mid);
}

.solver-container .checkbox-group input[type="checkbox"] {
  width: 1.125rem;
  height: 1.125rem;
  accent-color: var(--color-primary);
}

.solver-container .checkbox-group label {
  margin: 0;
  font-weight: 500;
  color: var(--color-light);
  cursor: pointer;
}

.solver-container .execute-btn {
  width: 100%;
  padding: 0.875rem;
  background: var(--color-primary);
  color: var(--color-light);
  border: none;
  border-radius: 20px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.solver-container .execute-btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.solver-container .execute-btn.surrogate-running,
.solver-container .execute-btn.surrogate-running:disabled {
  background: var(--color-dark);
  color: var(--color-primary);
  cursor: not-allowed;
  opacity: 1;
}

.solver-container .execute-btn.pybamm-running,
.solver-container .execute-btn.pybamm-running:disabled {
  background: var(--pybamm-color);
  color: #000;
  cursor: not-allowed;
  opacity: 1;
}

/* RIGHT PANEL - Scrollable Plots */
.solver-container .plot-panel {
  padding: 2rem;
  background: transparent;
  overflow-y: auto;
  min-height: 100vh;
}

.solver-container .results-header {
  margin-bottom: 2rem;
}

.solver-container .results-header h3 {
  margin: 0 0 1.5rem 0;
  color: var(--color-light);
  font-size: 1.75rem;
  font-weight: 600;
}

.solver-container .status-banner {
  margin-bottom: 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--color-accent);
  border-radius: 0.75rem;
  background: var(--color-light);
  color: var(--color-mid);
  font-size: 0.9rem;
}

.solver-container .metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.solver-container .metric-card {
  background: var(--color-dark);
  padding: 1.25rem;
}

.solver-container .metric-card strong {
  display: block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-light);
  margin-bottom: 0.5rem;
}

.solver-container .metric-card span {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-light);
}

.solver-container .metric-card.speedup {
  background: rgb(from var(--color-accent) r g b / 0.1);
  border-color: var(--color-accent);
}

.solver-container .metric-card.speedup span {
  color: var(--color-accent);
}

.solver-container .view-controls {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  background: var(--color-dark);
  padding: 0.5rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-mid);
  width: fit-content;
}

.solver-container .view-btn {
  padding: 0.5rem 1rem;
  border: none;
  background: transparent;
  color: var(--color-light);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 0.375rem;
  cursor: pointer;
  transition: all 0.2s;
}

.solver-container .view-btn:hover {
  background: var(--color-mid);
  border-color: var(--color-accent);
}

.solver-container .view-btn.active {
  background: var(--color-primary);
  color: var(--color-light);
}

/* Plot Grid Layouts */
.solver-container .plots-container {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.solver-container .plots-container.grid-view {
  grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.solver-container .plots-container.single-view {
  grid-template-columns: 1fr;
}

.solver-container .plots-container.compact-view {
  grid-template-columns: repeat(2, 1fr);
}

.solver-container .plot-card {
  background: #000 ;
  border-radius: 0.75rem;
  border: 1px solid var(--color-mid);
  overflow: hidden;
}


.solver-container .plot-card h4 {
  margin: 0;
  padding: 1rem 1.25rem;
  background: var(--color-dark);
  border-bottom: 1px solid var(--color-mid);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-light);
  text-transform: uppercase;
  letter-spacing: 0.025em;
}

.solver-container .plot-wrapper {
  padding: 1rem;
}

.solver-container .no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  text-align: center;
  color: var(--color-primary);
}

.solver-container .no-results h3 {
  font-size: 1.5rem;
  color: var(--color-light);
  margin-bottom: 0.5rem;
}

.solver-container .download-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: #000;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: 0.5rem;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.solver-container .download-btn:hover {
  background: var(--color-primary);
  color: var(--color-light);
}

/* Responsive */
@media (max-width: 1024px) {
  .solver-container {
    grid-template-columns: 1fr;
  }

  .solver-container .form-panel {
    position: relative;
    height: auto;
    border-right: none;
  }

  .solver-container .plots-container.grid-view {
    grid-template-columns: 1fr;
  }
}