:root {
  --isa-text: #18313a;
  --isa-muted: #64748b;
  --isa-border: rgba(148, 163, 184, 0.36);
  --isa-surface: rgba(255, 255, 255, 0.88);
  --isa-surface-solid: #ffffff;
  --isa-primary: #0f766e;
  --isa-primary-dark: #155e75;
  --isa-primary-soft: rgba(20, 184, 166, 0.16);
  --isa-accent: #0284c7;
  --isa-danger: #b42318;
  --isa-ring: rgba(20, 184, 166, 0.24);
  --isa-shadow: 0 18px 45px rgba(15, 76, 92, 0.16);
}

html {
  font-size: 14px;
  min-height: 100%;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--isa-text);
  background:
    linear-gradient(135deg, rgba(240, 253, 250, 0.96) 0%, rgba(226, 246, 248, 0.96) 42%, rgba(239, 246, 255, 0.96) 100%),
    #f8fafc;
  background-attachment: fixed;
}

body::before {
  content: "ISA";
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(15, 76, 92, 0.055);
  font-size: clamp(7rem, 22vw, 18rem);
  font-weight: 800;
  letter-spacing: 0.14em;
  pointer-events: none;
  user-select: none;
  z-index: 0;
}

header,
.navbar,
main,
footer,
.footer,
body > .container-fluid {
  position: relative;
  z-index: 1;
}

body > .container-fluid {
  flex: 1 0 auto;
}

.footer,
footer {
  bottom: auto !important;
  width: auto !important;
  white-space: normal !important;
  line-height: normal !important;
  flex-shrink: 0;
  color: var(--isa-muted) !important;
}

.site-footer {
  margin-top: auto;
  padding: 1rem 0;
  background-color: rgba(255, 255, 255, 0.42);
  border-color: var(--isa-border) !important;
}

.isa-navbar {
  background: linear-gradient(90deg, var(--isa-primary-dark), var(--isa-primary), var(--isa-accent)) !important;
  border: 0 !important;
  box-shadow: 0 10px 24px rgba(15, 76, 92, 0.14);
}

.isa-navbar .navbar-brand,
.isa-navbar .navbar-text,
.isa-navbar .nav-link {
  color: rgba(255, 255, 255, 0.84) !important;
}

.isa-navbar .navbar-brand {
  font-weight: 800;
  letter-spacing: 0.04em;
}

.isa-navbar .navbar-brand:hover,
.isa-navbar .navbar-brand:focus,
.isa-navbar .nav-link:hover,
.isa-navbar .nav-link:focus {
  color: #ffffff !important;
}

.isa-navbar .nav-link.active,
.isa-navbar .show > .nav-link {
  color: #ffffff !important;
  background-color: rgba(255, 255, 255, 0.13);
  border-radius: 0.375rem;
}

.isa-navbar .navbar-toggler {
  border-color: rgba(255, 255, 255, 0.35);
}

.isa-navbar .navbar-toggler:focus {
  box-shadow: 0 0 0 0.18rem rgba(255, 255, 255, 0.2);
}

.isa-navbar .btn-outline-light,
.isa-navbar .btn-outline-secondary,
.isa-navbar .btn-outline-primary {
  border-color: rgba(255, 255, 255, 0.72);
  color: #ffffff;
}

.isa-navbar .btn-outline-light:hover,
.isa-navbar .btn-outline-secondary:hover,
.isa-navbar .btn-outline-primary:hover,
.isa-navbar .btn-outline-light:focus,
.isa-navbar .btn-outline-secondary:focus,
.isa-navbar .btn-outline-primary:focus {
  background-color: rgba(255, 255, 255, 0.16);
  border-color: #ffffff;
  color: #ffffff;
}

.isa-language-switcher {
  display: inline-flex;
  gap: 0.35rem;
  margin: 0.35rem 0.75rem 0.35rem 0;
}

.isa-language-switcher .btn {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  min-width: 4.25rem;
  justify-content: center;
  border-radius: 999px;
  font-weight: 700;
}

.isa-language-switcher .btn.active {
  background-color: #ffffff;
  border-color: #ffffff;
  color: var(--isa-primary-dark);
}

.isa-language-flag {
  line-height: 1;
}

.isa-nav-icon {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
  flex: 0 0 auto;
}

.isa-button-icon {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
  margin-right: 0.35rem;
  vertical-align: -0.125em;
}

.isa-home-hero {
  display: grid;
  grid-template-columns: minmax(260px, 1.08fr) minmax(280px, 0.92fr);
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
  min-height: calc(100vh - 180px);
  padding: clamp(1.5rem, 5vw, 4rem) 0;
}

.isa-home-visual {
  min-width: 0;
}

.isa-home-visual img {
  display: block;
  width: 100%;
  max-height: min(620px, calc(100vh - 170px));
  object-fit: contain;
}

.isa-home-copy {
  max-width: 560px;
}

.isa-home-copy h1 {
  margin: 0 0 1rem;
  color: #102a35;
  font-size: clamp(2rem, 3.5vw, 3.2rem);
  line-height: 1.08;
  font-weight: 800;
}

.isa-home-copy p {
  margin: 0;
  color: #223b45;
  font-size: 1.05rem;
  line-height: 1.65;
  text-align: justify;
}

.card,
.modal-content {
  border-color: var(--isa-border);
  box-shadow: var(--isa-shadow);
}

.btn-primary {
  border-color: var(--isa-primary);
  background: linear-gradient(135deg, var(--isa-primary), var(--isa-accent));
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.18);
}

.btn-primary:hover,
.btn-primary:focus {
  border-color: var(--isa-primary-dark);
  background: linear-gradient(135deg, var(--isa-primary-dark), var(--isa-primary));
}

.btn:focus,
.btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
  border-color: rgba(15, 118, 110, 0.58);
  box-shadow: 0 0 0 0.1rem #ffffff, 0 0 0 0.25rem var(--isa-ring);
}

.form-control,
.form-check-input {
  border-color: var(--isa-border);
}

.form-floating > .form-control-plaintext::placeholder,
.form-floating > .form-control::placeholder {
  color: var(--bs-secondary-color);
  text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder,
.form-floating > .form-control:focus::placeholder {
  text-align: start;
}

.modal {
  position: fixed !important;
  z-index: 2050 !important;
}

.modal-backdrop {
  z-index: 2040 !important;
}

.isa-auth-page {
  display: block;
}

.isa-auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 32px 16px;
}

.isa-auth-card {
  width: 100%;
  max-width: 440px;
  overflow: hidden;
  border: 1px solid var(--isa-border);
  border-radius: 18px;
  background: var(--isa-surface);
  box-shadow: var(--isa-shadow);
  backdrop-filter: blur(10px);
  animation: isa-auth-enter 0.45s ease-out both;
}

.isa-auth-card-wide {
  max-width: 520px;
}

.isa-auth-header {
  display: flex;
  gap: 12px;
  align-items: center;
  padding: 22px 22px 14px;
  border-bottom: 1px solid var(--isa-border);
}

.isa-auth-logo {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  color: #ffffff;
  background: linear-gradient(135deg, var(--isa-primary), var(--isa-accent));
  box-shadow: 0 12px 24px rgba(15, 118, 110, 0.22);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.isa-auth-title {
  margin: 0;
  font-size: 1.12rem;
  line-height: 1.2;
  font-weight: 800;
}

.isa-auth-subtitle {
  margin: 4px 0 0;
  color: var(--isa-muted);
  font-size: 0.88rem;
}

.isa-auth-body {
  padding: 20px 22px 22px;
}

.isa-auth-page .alert {
  border-radius: 12px;
}

.isa-auth-page .form-control {
  border-radius: 12px;
  padding: 0.7rem 0.8rem;
}

.isa-auth-page .btn {
  border-radius: 12px;
  padding: 0.72rem 0.9rem;
  font-weight: 700;
}

.isa-auth-page .form-label {
  color: #334155;
  font-size: 0.88rem;
  font-weight: 650;
}

.isa-auth-page .form-text,
.isa-auth-page .text-muted {
  color: var(--isa-muted) !important;
}

.isa-auth-page .img-fluid.border {
  border-color: var(--isa-border) !important;
  background: var(--isa-surface-solid);
  border-radius: 12px !important;
  padding: 8px;
}

.isa-auth-language-switcher {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  margin-top: 1rem;
}

.isa-auth-language-switcher .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  min-width: 4.25rem;
}

.isa-auth-language-switcher .btn.active {
  background-color: var(--isa-primary);
  border-color: var(--isa-primary);
  color: #ffffff;
}

.isa-auth-qr {
  max-width: 220px;
}

.isa-database-provider-button {
  display: flex;
  min-height: 132px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.65rem;
}

.isa-database-provider-icon {
  width: min(100%, 96px);
  height: 72px;
  object-fit: contain;
}

.isa-preprocess-table {
  min-width: 1480px;
}

.isa-preprocess-chart {
  display: block;
  width: 160px !important;
  max-width: 160px;
  height: 58px !important;
  max-height: 58px;
}

.isa-chart-frame {
  width: min(100%, 600px);
  max-width: 600px;
  height: 400px;
  max-height: 400px;
}

.isa-binning-analysis-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-start;
}

.isa-modelling-chart-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 600px), 600px));
  gap: 1rem;
  align-items: start;
}

.isa-metrics-panel {
  min-width: 320px;
  max-width: 460px;
  flex: 1 1 320px;
}

.isa-binning-chart {
  display: block;
  width: 600px !important;
  max-width: 100%;
  height: 400px !important;
  max-height: 400px;
}

.isa-variable-select {
  min-height: 320px;
}

.isa-correlation-matrix {
  font-size: 0.72rem;
  white-space: nowrap;
}

.isa-correlation-matrix th,
.isa-correlation-matrix td {
  min-width: 3.4rem;
  padding: 0.25rem 0.35rem;
}

.isa-correlation-matrix thead th {
  max-width: 9rem;
  overflow: hidden;
  text-overflow: ellipsis;
}

.isa-correlation-sticky {
  position: sticky;
  left: 0;
  z-index: 2;
  max-width: 12rem;
  overflow: hidden;
  text-overflow: ellipsis;
  background-color: #ffffff;
}

@keyframes isa-auth-enter {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 380px) {
  .isa-auth-header,
  .isa-auth-body {
    padding-left: 18px;
    padding-right: 18px;
  }
}

@media (max-width: 767.98px) {
  .isa-home-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 1rem;
  }

  .isa-home-visual img {
    max-height: 360px;
  }

  .isa-home-copy {
    max-width: none;
  }

  .isa-home-copy h1 {
    font-size: 2rem;
  }

  .isa-home-copy p {
    text-align: left;
  }
}