/*
 * Shared visual layer for the Pond Algae & Aquatic Plant ID Assistant.
 * It deliberately does not change scoring, form names, or JavaScript flow.
 */
:root {
  --pond-ink: #211b27;
  --pond-muted: #625a67;
  --pond-purple: #2e1a47;
  --pond-purple-2: #48276a;
  --pond-orange: #f56600;
  --pond-orange-dark: #b94700;
  --pond-canvas: #f7f5f1;
  --pond-surface: #ffffff;
  --pond-soft: #f0ede8;
  --pond-line: #d8d1ca;
  --pond-focus: #1769aa;
  --pond-caution-bg: #fbf1d7;
  --pond-caution-line: #bd8a18;
  --pond-caution-ink: #563b00;
  --pond-success: #1f684d;
}

* { box-sizing: border-box; }

body.pond-app {
  margin: 0;
  overflow-x: clip;
  color: var(--pond-ink);
  background: var(--pond-canvas);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.55;
}

.skip-link {
  position: fixed;
  z-index: 10000;
  top: 0;
  left: 50%;
  padding: 10px 16px;
  color: #fff;
  background: var(--pond-purple);
  transform: translate(-50%, -120%);
}

.skip-link:focus { transform: translate(-50%, 8px); }

.app-topbar {
  position: sticky;
  z-index: 1000;
  top: 0;
  background: #fff;
  border-bottom: 1px solid var(--pond-line);
  box-shadow: 0 2px 12px rgba(33, 27, 39, .08);
}

.app-topbar__inner {
  display: flex;
  align-items: center;
  gap: 10px;
  width: min(1120px, calc(100% - 32px));
  min-height: 42px;
  margin: 0 auto;
  padding: 4px 0;
}

.brand-link { display: inline-flex; align-items: center; }
.brand-link:focus-visible { outline: 3px solid var(--pond-focus); outline-offset: 4px; }
.brand-link--extension img { width: min(165px, 48vw); height: auto; }
.brand-link--cucat { margin-left: auto; }
.brand-link--cucat img { width: min(92px, 26vw); height: auto; }

.app-shell { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.app-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  margin: 0 calc(50% - 50vw) 32px;
  padding: clamp(34px, 6vw, 68px) max(16px, calc((100vw - 1120px) / 2));
  color: #fff;
  background:
    radial-gradient(circle at 88% 22%, rgba(245, 102, 0, .48), rgba(245, 102, 0, 0) 28%),
    linear-gradient(122deg, var(--pond-purple) 0%, #3b205b 56%, #533271 100%);
  border-bottom: 5px solid var(--pond-orange);
}

.pond-app .title {
  display: block;
  margin: 0;
  padding: 0;
  color: #fff;
  background: transparent;
  border: 0;
  border-radius: 0;
  font-variant: normal;
  text-align: left;
}

.pond-app .title h1 {
  max-width: 800px;
  margin: 0 0 0 7px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 400;
  line-height: 1.04;
}

.pond-app .hero-byline {
  max-width: 680px;
  margin: 18px 0 0 7px;
  color: rgba(255, 255, 255, .9);
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.45;
}

.pond-app .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 7px;
  color: var(--pond-orange);
  background: rgba(46, 26, 71, .96);
  border-radius: 4px;
  font-size: clamp(.72rem, 1.5vw, .9rem);
  font-weight: 700;
  letter-spacing: .13em;
  line-height: 1.2;
  text-transform: uppercase;
}

.hero-hab-logo {
  display: block;
  width: clamp(104px, 13vw, 156px); /* at least 30% larger than the former 90px mark */
  height: auto;
  clip-path: circle(48.5% at 50% 50%);
  filter: drop-shadow(0 5px 12px rgba(0, 0, 0, .24));
}

.pond-app hr { clear: both; border: 0; border-top: 1px solid var(--pond-line); margin: 24px 0; }
.pond-app .secondary { font-size: 1rem; }
.pond-app .secondary p { margin: 0 0 14px; }
.pond-app .default { font-size: 1rem; }

.pond-app div.section {
  display: block;
  width: 100%;
  margin: 28px 0;
  padding: clamp(22px, 3.2vw, 34px);
  color: var(--pond-ink);
  background: var(--pond-surface);
  border: 1px solid var(--pond-line);
  border-radius: 14px;
  box-shadow: none;
  overflow-wrap: anywhere;
}

.pond-app div.section::after { content: ""; display: block; clear: both; }

.pond-app div.subsection,
.pond-app div.subsubsection {
  display: block;
  width: 100%;
  margin: 0;
  padding: 20px 0;
  color: var(--pond-ink);
  background: transparent;
  border: 0;
  border-top: 1px solid var(--pond-line);
  border-radius: 0;
  overflow-wrap: anywhere;
}

.pond-app #clarity_question[hidden] {
  display: none !important;
}

.pond-app div.subsubsection {
  margin-top: 10px;
  padding: 16px;
  background: #faf8f5;
  border: 1px solid #e4ded8;
  border-radius: 8px;
}

/* A nested .section is legacy structural markup, not a second visual card. */
.pond-app div.section div.section {
  margin: 0;
  padding: 0;
  background: transparent !important;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.pond-app div.heading {
  display: block;
  margin: 0 0 18px !important;
  padding: 0 0 12px;
  color: var(--pond-orange-dark);
  border-bottom: 1px solid var(--pond-line);
  font-size: .76rem;
  font-weight: 700;
  letter-spacing: .11em;
  text-decoration: none;
  text-transform: uppercase;
}

.pond-app div.heading h2 { margin: 0; font-size: clamp(1.4rem, 3vw, 2rem); letter-spacing: 0; text-transform: none; }

.pond-app input[type=text],
.pond-app input[type=number],
.pond-app input[type=email],
.pond-app input[type=password],
.pond-app input[type=tel],
.pond-app select {
  min-height: 44px;
  padding: 8px 10px;
  color: var(--pond-ink);
  background: #fff;
  border: 1px solid #aaa29b;
  border-radius: 8px;
  font: inherit;
  line-height: 1.25;
  text-align: left;
}

.pond-app input[type=checkbox], .pond-app input[type=radio] { accent-color: var(--pond-purple); }

.pond-app label,
.pond-app legend {
  color: var(--pond-purple);
  font-weight: 700;
  line-height: 1.4;
}

.pond-app small,
.pond-app .field-help {
  color: var(--pond-muted);
  line-height: 1.45;
}

.pond-app a:not(.brand-link) {
  color: #48276a;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
}

.pond-app a:not(.brand-link):hover { color: var(--pond-orange-dark); }

.pond-app button,
.pond-app .btn-primary {
  min-height: 44px;
  padding: 10px 16px;
  color: var(--pond-purple);
  background: #fff;
  border: 1px solid #9c91a0;
  border-radius: 8px;
  box-shadow: none;
  cursor: pointer;
  font: 700 1rem/1.2 Arial, Helvetica, sans-serif;
  letter-spacing: .01em;
  transition: background-color .16s ease, border-color .16s ease, color .16s ease, transform .16s ease;
}

.pond-app button:hover { background: #f3eff4; border-color: var(--pond-purple); }
.pond-app button:active { transform: translateY(1px); }
.pond-app button:disabled { opacity: .55; cursor: not-allowed; }
.pond-app button:focus-visible,
.pond-app input:focus-visible,
.pond-app select:focus-visible,
.pond-app a:focus-visible { outline: 3px solid var(--pond-focus); outline-offset: 3px; }

.pond-app .btn-primary,
.pond-app .result-action--next {
  color: #fff;
  background: var(--pond-purple);
  border-color: var(--pond-purple);
}
.pond-app .btn-primary:hover,
.pond-app .result-action--next:hover { color: #fff; background: var(--pond-purple-2); border-color: var(--pond-purple-2); }

.pond-app .result-action--report,
.pond-app .result-action--accessible { color: var(--pond-purple); background: #fff; border-color: #9c91a0; }
.pond-app .result-action--report:hover,
.pond-app .result-action--accessible:hover { color: var(--pond-purple); background: #f3eff4; border-color: var(--pond-purple); }
.pond-app .result-action--back { color: #4c414d; background: #f4f1ed; border-color: #cfc7c0; }

/* Result-image credits use the standard light control treatment.  Keep that
   treatment while focused so a click does not leave the button looking stuck. */
.pond-app .result-image-card .challenge-credit-btn,
.pond-app .result-image-card .challenge-credit-btn:hover,
.pond-app .result-image-card .challenge-credit-btn:focus {
  color: var(--pond-purple);
  background: #fff;
  border-color: #9c91a0;
}

.pond-app .result-image-card .challenge-credit-btn:hover { background: #f3eff4; border-color: var(--pond-purple); }
.pond-app .result-image-card .challenge-credit-btn:focus-visible { outline: 3px solid var(--pond-focus); outline-offset: 3px; }

/* Orange marks the two high-attention transitions, not routine controls. */
.pond-app #btn_continue_to_assistant,
.pond-app .result-action--next {
  color: #fff;
  background: var(--pond-orange-dark);
  border-color: var(--pond-orange-dark);
}

.pond-app #btn_continue_to_assistant:hover,
.pond-app .result-action--next:hover {
  color: #fff;
  background: #913800;
  border-color: #913800;
}

.pond-app .button-danger {
  color: #8b2424;
  background: #fff;
  border-color: #bd6b6b;
}

.pond-app .button-danger:hover { color: #711b1b; background: #fdf0f0; border-color: #9e4040; }

.pond-app .intro-tabs { justify-content: flex-start; margin: 0 0 12px; }
.pond-app .intro-tab { color: var(--pond-purple); background: #fff; border-color: var(--pond-line); }
.pond-app .intro-tab.active { color: #fff; background: var(--pond-purple); border-color: var(--pond-purple); }
.pond-app .intro-panel { padding: 18px; color: var(--pond-ink); background: var(--pond-soft); border: 1px solid #e4ded8; border-radius: 10px; }

.landing-overview {
  display: grid;
  gap: 20px;
  margin: 0 0 36px;
}

.landing-overview__lead {
  max-width: 780px;
  color: #3c3341;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.12rem, 2.2vw, 1.34rem);
  line-height: 1.55;
}

.landing-overview__lead p:last-child { margin-bottom: 0; }

.landing-overview__how-it-works {
  padding: clamp(20px, 3vw, 30px);
  background: var(--pond-surface);
  border: 1px solid var(--pond-line);
  border-radius: 14px;
  box-shadow: 0 2px 8px rgba(33, 27, 39, .05);
}

.landing-overview__eyebrow {
  margin: 0 0 5px !important;
  color: var(--pond-orange-dark);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.landing-overview__how-it-works h2 {
  margin: 0;
  color: var(--pond-purple);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 400;
  line-height: 1.15;
}

.landing-overview__steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 22px 0 18px;
  padding: 0;
  list-style: none;
  counter-reset: landing-step;
}

.landing-overview__steps li {
  position: relative;
  min-width: 0;
  padding: 48px 16px 16px;
  color: var(--pond-ink);
  background: var(--pond-soft);
  border: 1px solid #e4ded8;
  border-radius: 10px;
  counter-increment: landing-step;
}

.landing-overview__steps li::before {
  position: absolute;
  top: 15px;
  left: 16px;
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: #fff;
  background: var(--pond-purple);
  border-radius: 50%;
  content: counter(landing-step);
  font-size: .78rem;
  font-weight: 700;
}

.landing-overview__steps h3 {
  margin: 0 0 8px;
  color: var(--pond-purple);
  font-size: 1.05rem;
  line-height: 1.28;
}

.landing-overview__steps p:last-child { margin-bottom: 0; }

.landing-overview__note {
  padding: 14px 16px;
  color: var(--pond-caution-ink);
  background: var(--pond-caution-bg);
  border-left: 4px solid var(--pond-caution-line);
  border-radius: 6px;
}

.landing-overview__details {
  max-width: 900px;
  padding: 0 18px;
  color: var(--pond-ink);
  background: #fff;
  border: 1px solid var(--pond-line);
  border-radius: 10px;
}

.landing-overview__details summary {
  padding: 14px 22px 14px 0;
  color: var(--pond-purple);
  cursor: pointer;
  font-weight: 700;
}

.landing-overview__details > div { padding: 2px 0 4px; }
.landing-overview__details p:last-child { margin-bottom: 14px; }

@media (max-width: 720px) {
  .landing-overview__steps { grid-template-columns: 1fr; }
}

.pond-app .notice,
.pond-app .notice-caution,
.pond-app .alert-notice,
.pond-app .alert-emergency,
.pond-app .result-caution {
  color: var(--pond-caution-ink);
  background: var(--pond-caution-bg);
  border-color: var(--pond-caution-line);
}

.pond-app div.subsubsection.alert-box,
.pond-app div.subsubsection.notice-box {
  color: var(--pond-caution-ink);
  background: var(--pond-caution-bg);
  border-color: var(--pond-caution-line);
}

.pond-app .alert-box,
.pond-app .notice-box { max-width: none; border-left: 5px solid var(--pond-caution-line); box-shadow: none; }
.pond-app .result-caution { padding: 16px 18px; border: 1px solid var(--pond-caution-line); border-left-width: 5px; border-radius: 8px; }
.pond-app .alert-box b { color: inherit; }

/* Follow-up fields are contextual, not caution messages. */
.pond-app div.subsubsection.concern-followup {
  max-width: none;
  margin: 10px 0 14px 26px;
  padding: 16px;
  color: var(--pond-ink) !important;
  background: #fff !important;
  border: 1px solid var(--pond-line) !important;
  border-left: 4px solid #827664 !important;
  border-radius: 8px;
  box-shadow: none;
}

.pond-app .concern-followup small { color: var(--pond-muted); }

.pond-app .concern-followup textarea {
  width: 100% !important;
  margin-top: 6px;
  background: #fff;
}

/* Emergency guidance stays prominent without competing with input fields. */
.pond-app div.subsubsection.alert-box.alert-emergency.emergency-notice {
  max-width: none;
  padding: 16px 18px;
  color: #5b2f2c !important;
  background: #fcf0ee !important;
  border: 1px solid #d79b94 !important;
  border-left: 5px solid #a9473d !important;
  border-radius: 8px;
  box-shadow: none;
}

.pond-app .alert-emergency.emergency-notice b { color: #722d26 !important; }
.pond-app .emergency-notice { scroll-margin-top: 64px; }
.pond-app #notice_sewage { scroll-margin-top: 64px; }

/* Results are informative, not a dominant control surface. */
.pond-app #span_final_output .accordion {
  min-height: 0;
  margin: 10px 0 0;
  padding: 15px 16px;
  color: #3e3542;
  background: #f3f0ec;
  border: 1px solid #d5cec7;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.35;
  box-shadow: none;
}
.pond-app #span_final_output .accordion:hover,
.pond-app #span_final_output .accordion.active { background: #ebe6e0; border-color: #b8aea4; }
.pond-app #span_final_output .accordion.active { border-left: 4px solid var(--pond-orange); }
.pond-app #span_final_output .accordion:after { color: var(--pond-muted); }
.pond-app #span_final_output .panel[hidden] { display: none; }
.pond-app .result-badge { font-size: .75rem; }
.pond-app .result-badge-invasive { color: var(--pond-caution-ink); background: var(--pond-caution-bg); border-color: var(--pond-caution-line); }
.pond-app .result-badge-hab { color: #6f2020; background: #f9e5e3; border-color: #bd625d; }

.pond-app .platform-meta {
  margin: 20px 0 0;
  color: var(--pond-muted);
  font-size: .9rem;
}

.pond-app .app-footer {
  margin: 32px 0;
  padding: clamp(20px, 3vw, 30px);
  color: #4f4751;
  background: #f1ede8;
  border: 1px solid var(--pond-line);
  border-radius: 12px;
}

.pond-app .app-footer p { margin: 0; }

.pond-app .app-footer__citation {
  padding-bottom: 16px;
  color: var(--pond-ink);
  border-bottom: 1px solid #d8d1ca;
}

.pond-app .app-footer__citation > p:first-child { color: var(--pond-purple); }
.pond-app .app-footer .author-order-note { margin-top: 4px; color: var(--pond-muted); font-size: .85rem; }

.pond-app .app-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  padding: 14px 0;
  color: var(--pond-muted);
  font-size: .9rem;
}

.pond-app .app-footer__support {
  display: grid;
  gap: 10px;
  padding-top: 14px;
  color: var(--pond-muted);
  border-top: 1px solid #d8d1ca;
  font-size: .9rem;
}

.pond-app .app-footer__support a { font-weight: 700; }
.pond-app .funding-acknowledgment { margin: 28px 0 0; color: #4f4751; background: #f3efe9; border-left-color: var(--pond-orange); }

.pond-app .photo-upload-label {
  display: block;
  margin: 16px 0 6px;
  color: var(--pond-ink);
  font-weight: 700;
}

.pond-app .photo-upload-label span { color: var(--pond-muted); font-weight: 400; }

.pond-app #map { width: 100%; min-height: 420px; border: 1px solid var(--pond-line); border-radius: 10px; }
.pond-app .leaflet-container { font-family: Arial, Helvetica, sans-serif; }
.pond-app .basemap-toggle-btn { min-height: 0; color: var(--pond-ink); background: #fff; }

@media (max-width: 680px) {
  .app-topbar__inner { min-height: 40px; }
  .brand-link--extension img { width: min(150px, 52vw); }
  .brand-link--cucat img { width: min(84px, 28vw); }
  .app-shell { width: min(100% - 24px, 1120px); }
  .app-hero { grid-template-columns: 1fr auto; gap: 14px; margin-bottom: 22px; }
  .hero-hab-logo { width: clamp(86px, 24vw, 116px); }
  .pond-app .title h1 { font-size: clamp(1.8rem, 9vw, 2.75rem); }
  .pond-app div.section { margin: 14px 0; padding: 18px; }
  .pond-app .continueRow { justify-content: stretch; }
  .pond-app #btn_continue_to_assistant { width: 100%; }
  .pond-app .notice { width: 100%; max-width: none; border-radius: 10px; }
  .pond-app #map { min-height: 330px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}