:root {
  --color-bg: #f4f1ea;
  --color-card: #ffffff;
  --color-primary: #5b7553;
  --color-primary-dark: #3f5537;
  --color-text: #2b2b28;
  --color-muted: #6b6b63;
  --color-border: #e0dccf;
  --color-error-bg: #fdecea;
  --color-error-text: #8a2c1f;
  --radius: 10px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.app-header {
  position: relative;
  text-align: center;
  padding: 3rem 1rem 1.5rem;
  min-height: 22rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background:
    linear-gradient(180deg, rgba(18, 29, 23, 0.42), rgba(18, 29, 23, 0.6)),
    url("/UnderMe_Background.jpeg") center 58% / cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
  box-shadow: inset 0 0 0 999px rgba(18, 29, 23, 0.12);
}

.app-header > * {
  position: relative;
  z-index: 1;
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
}

.brand-mark {
  width: 3.2rem;
  height: 3.2rem;
  object-fit: contain;
  border-radius: 0.5rem;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.2);
}

.app-header h1 {
  margin: 0;
  color: #f5f7f2;
  letter-spacing: 0.02em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.tagline {
  margin: 0.35rem 0 0;
  color: rgba(255, 255, 255, 0.94);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.app-intro {
  max-width: 620px;
  margin: 0.7rem auto 0;
  color: rgba(255, 255, 255, 0.94);
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.school-rock-btn {
  width: auto;
  margin-top: 0.8rem;
}

.advanced-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.75rem;
  color: rgba(255, 255, 255, 0.96);
  font-size: 0.85rem;
  cursor: pointer;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.connection-status {
  display: inline-block;
  margin: 0.65rem 0 0 0.6rem;
  color: #f6f8f5;
  font-size: 0.8rem;
  font-weight: 700;
  text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.connection-status.offline {
  color: var(--color-error-text);
}

.button-hint {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.7rem;
  font-weight: 400;
  opacity: 0.75;
}

.section-nav {
  position: sticky;
  top: 0;
  z-index: 900;
  display: flex;
  gap: 0.8rem;
  overflow-x: auto;
  padding: 0.55rem max(1rem, calc((100vw - 1180px) / 2));
  background: rgba(244, 241, 234, 0.95);
  border-block: 1px solid var(--color-border);
  white-space: nowrap;
}

.section-nav a {
  color: var(--color-primary-dark);
  font-size: 0.82rem;
  text-decoration: none;
}

.section-nav a:focus-visible,
.section-nav a:hover {
  color: var(--color-text);
  text-decoration: underline;
  text-underline-offset: 0.2rem;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.card {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius);
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  cursor: pointer;
  width: auto;
  max-width: 100%;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
}

.btn-secondary {
  background: var(--color-border);
  color: var(--color-text);
}

.divider {
  display: flex;
  align-items: center;
  text-align: center;
  color: var(--color-muted);
  margin: 1rem 0;
  font-size: 0.85rem;
}

.divider::before,
.divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--color-border);
}

.divider span {
  padding: 0 0.75rem;
}

.search-form {
  display: flex;
  gap: 0.5rem;
}

#search-input {
  flex: 1;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
}

.search-results {
  list-style: none;
  margin: 0.75rem 0 0;
  padding: 0;
  border-top: 1px solid var(--color-border);
}

.search-results li {
  padding: 0.6rem 0.25rem;
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
}

.search-results li:hover {
  background: var(--color-bg);
}

.status {
  padding: 1rem;
  border-radius: var(--radius);
  text-align: center;
}

.status.loading {
  background: #eef1ec;
  color: var(--color-muted);
}

.status.error {
  background: var(--color-error-bg);
  color: var(--color-error-text);
}

.location-card h2 {
  margin: 0 0 0.25rem;
}

.coords {
  margin: 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.summary-card h3,
.units-card h3,
.deep-time-card h3 {
  margin-top: 0;
  color: var(--color-primary-dark);
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.section-heading h3 {
  margin-bottom: 0;
}

.section-heading .eyebrow {
  margin-bottom: 0.2rem;
}

.time-age-output {
  flex: 0 0 auto;
  color: #8c3d1c;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: right;
}

.time-period-label {
  margin: 0.25rem 0 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.time-slider {
  display: block;
  width: 100%;
  margin: 1.1rem 0 0.25rem;
  accent-color: #c26a2e;
  cursor: pointer;
}

.time-scale-labels {
  display: flex;
  justify-content: space-between;
  color: var(--color-muted);
  font-size: 0.72rem;
}

.time-map {
  height: 300px;
  margin-top: 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #8fc5d4;
}

.time-disclaimer {
  margin: 0.65rem 0 0;
  color: var(--color-muted);
  font-size: 0.75rem;
}

.time-disclaimer a {
  color: var(--color-primary-dark);
}

.stratigraphy-card h3 {
  margin-top: 0;
  color: var(--color-primary-dark);
}

.stratigraphic-column {
  display: flex;
  flex-direction: column-reverse;
  gap: 2px;
  min-height: 180px;
  margin-top: 0.75rem;
  padding: 0.4rem;
  border-left: 5px solid #8c7650;
  background: #eef1ec;
}

.stratigraphic-unit {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  min-height: 28px;
  flex: var(--unit-size) 1 0;
  padding: 0.35rem 0.5rem;
  border: 1px solid rgba(76, 61, 35, 0.35);
  background: #c9aa71;
  color: #342b1e;
  text-align: left;
  cursor: pointer;
  overflow: hidden;
}

.stratigraphic-unit:nth-child(3n) { background: #a7c4b0; }
.stratigraphic-unit:nth-child(3n + 1) { background: #d4b17b; }
.stratigraphic-unit:nth-child(3n + 2) { background: #b8a8c8; }

.stratigraphic-unit:hover,
.stratigraphic-unit:focus-visible {
  outline: 2px solid var(--color-primary-dark);
  outline-offset: 1px;
  filter: saturate(1.15);
}

.stratigraphic-unit-name {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stratigraphic-unit-age {
  flex: 0 0 auto;
  font-size: 0.75rem;
}

.rock-reference {
  margin-top: 0.6rem;
  padding: 0.55rem 0.7rem;
  border-left: 3px solid var(--color-primary);
  background: #f5f7f2;
  font-size: 0.82rem;
}

.classification-missing {
  color: var(--color-muted);
  font-style: italic;
}

.mineral-reference-card h3 {
  margin-top: 0;
  color: var(--color-primary-dark);
}

.mineral-reference-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: 0.45rem;
  margin-top: 0.75rem;
}

.mineral-reference-item {
  min-width: 0;
  padding: 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #f7f8f4;
  font-size: 0.85rem;
}

.mineral-reference-item a {
  color: var(--color-primary-dark);
  font-weight: 600;
}

.rock-reference details {
  margin-top: 0.45rem;
}

.rock-reference summary {
  color: var(--color-primary-dark);
  cursor: pointer;
}

.rock-mineral-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 0.65rem;
  margin-top: 0.4rem;
}

.advanced-mineral-details {
  display: block;
  margin-top: 0.25rem;
  color: var(--color-muted);
  font-size: 0.75rem;
}

.advanced-tools-card h3,
.advanced-tools-card h4 {
  color: var(--color-primary-dark);
}

.advanced-tools-card > label,
.composition-tool > label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin: 0.7rem 0;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.advanced-tools-card select,
.advanced-tools-card input {
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font: inherit;
}

.rock-photo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 0.6rem;
}

.rock-photo-grid figure {
  margin: 0;
  font-size: 0.72rem;
}

.rock-photo-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius);
}

.rock-photo-grid figcaption {
  color: var(--color-muted);
}

.melt-lab-tool,
.composition-tool,
.classifier-tool {
  margin-top: 1rem;
  padding-top: 0.8rem;
  border-top: 1px solid var(--color-border);
}

.melt-minerals,
.composition-output,
.classifier-inputs {
  display: grid;
  gap: 0.35rem;
  margin-top: 0.6rem;
}

.melt-mineral,
.composition-output span {
  padding: 0.45rem 0.6rem;
  border-radius: var(--radius);
  font-size: 0.82rem;
}

.melt-circle {
  position: relative;
  display: grid;
  width: min(230px, 70vw);
  aspect-ratio: 1;
  margin: 0.9rem auto;
  place-items: center;
  overflow: hidden;
  border: 5px solid #6b5530;
  border-radius: 50%;
  background: linear-gradient(to bottom, #c23b22 0 var(--melt-percent), #c9aa71 var(--melt-percent) 100%);
  box-shadow: inset 0 0 0 2px rgba(255,255,255,.35), 0 2px 5px rgba(0,0,0,.12);
}

.melt-circle::after {
  content: "";
  position: absolute;
  inset: var(--melt-percent) 0 0;
  opacity: 0.55;
  pointer-events: none;
}

.rock-pattern-igneous::after {
  background-image: radial-gradient(#513f2b 1px, transparent 1px);
  background-size: 12px 12px;
}

.rock-pattern-sedimentary::after {
  background-image: repeating-linear-gradient(0deg, transparent 0 9px, #806943 10px 11px);
}

.rock-pattern-metamorphic::after {
  background-image: repeating-linear-gradient(135deg, transparent 0 8px, #6c5470 9px 11px);
}

.melt-circle-melt,
.melt-circle-solid {
  position: absolute;
  z-index: 1;
  left: 50%;
  transform: translateX(-50%);
  color: #fff;
  font-weight: 700;
  text-shadow: 0 1px 2px #332016;
  white-space: nowrap;
}

.melt-circle-melt { top: 18%; }
.melt-circle-solid { bottom: 18%; color: #342b1e; text-shadow: 0 1px 1px rgba(255,255,255,.7); }

.melt-mineral.crystallized { background: #dcebd8; color: var(--color-primary-dark); }
.melt-mineral.molten { background: #f8e1cf; color: #8c3d1c; }

.classifier-inputs {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.classifier-inputs label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  color: var(--color-muted);
  font-size: 0.78rem;
}

.classifier-inputs input {
  width: 4rem;
}

.units-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.unit-item {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
}

.unit-item:last-child {
  border-bottom: none;
}

.unit-name {
  font-weight: 600;
}

.unit-meta {
  color: var(--color-muted);
  font-size: 0.9rem;
  margin: 0.15rem 0;
}

.unit-description {
  font-size: 0.9rem;
  margin: 0.35rem 0 0;
}

.app-footer {
  text-align: center;
  color: var(--color-muted);
  font-size: 0.8rem;
  padding: 1rem;
}

.app-footer a {
  color: var(--color-primary-dark);
}

.empty-state {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.empty-state-icon {
  display: inline-grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  color: var(--color-primary-dark);
  font-size: 1.4rem;
}

.empty-state p {
  margin: 0;
}

.info-page {
  max-width: 720px;
  margin: 0 auto;
  padding: 4rem 1.25rem;
}

.info-page h1,
.info-page h2 {
  color: var(--color-primary-dark);
}

.info-page h2 {
  margin-top: 2rem;
}

.info-action {
  width: auto;
  text-decoration: none;
}

.text-button {
  margin-top: 0.45rem;
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--color-primary-dark);
  text-decoration: underline;
  cursor: pointer;
}

.public-find-warning {
  margin: 0.65rem 0;
  color: var(--color-muted);
  font-size: 0.82rem;
}

.layer-status {
  min-height: 1.25rem;
  margin: 0.45rem 0 0;
  color: var(--color-muted);
  font-size: 0.82rem;
}

.layer-status.error {
  color: var(--color-error-text);
}

.layer-status.loading {
  color: var(--color-primary-dark);
}

.auth-error.success {
  color: var(--color-primary-dark);
}

/* --- Auth panel --- */

.auth-tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.auth-panel summary {
  cursor: pointer;
  color: var(--color-primary-dark);
  font-weight: 700;
}

.auth-panel[open] summary {
  margin-bottom: 0.8rem;
}

.auth-tab {
  flex: 1;
  padding: 0.5rem;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 0.9rem;
}

.auth-tab.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.auth-form label {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.auth-form input {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
}

.auth-error {
  color: var(--color-error-text);
  font-size: 0.9rem;
  margin: 0.5rem 0 0;
}

#auth-logged-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

/* --- Find logging --- */

.find-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.find-form input,
.find-form textarea,
.find-form select {
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
}

.find-status {
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
}

.find-status.success {
  color: var(--color-primary-dark);
}

.find-status.error {
  color: var(--color-error-text);
}

.field-controls {
  display: grid;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.field-controls .btn.active {
  background: var(--color-primary-dark);
  color: #fff;
}

.saved-track {
  display: grid;
  gap: 0.25rem;
  padding: 0.65rem 0;
  border-bottom: 1px solid var(--color-border);
}

.track-export-btn {
  width: auto;
  justify-self: start;
  padding: 0.45rem 0.7rem;
  font-size: 0.8rem;
}

/* --- Leaflet map --- */

#map {
  height: 300px;
  border-radius: var(--radius);
  margin-top: 0.75rem;
}

.map-legend {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 0.6rem 0 0;
  padding: 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

.map-legend li {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.map-resources {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.75rem;
  margin-top: 0.7rem;
  font-size: 0.8rem;
}

.map-resources strong {
  flex-basis: 100%;
  color: var(--color-primary-dark);
}

.map-resources a {
  color: var(--color-primary-dark);
}

.map-layer-note {
  flex-basis: 100%;
  color: var(--color-muted);
  font-size: 0.75rem;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.legend-active { background: #2e7d32; }
.legend-inactive { background: #f9a825; }
.legend-abandoned { background: #c62828; }
.legend-unknown { background: #757575; }

.drop-pin-hint {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: var(--color-primary-dark);
}

.layer-toggles {
  display: flex;
  gap: 1rem;
  margin: 0.6rem 0;
  font-size: 0.85rem;
}

.layer-toggles label {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  cursor: pointer;
}

.trail-marker-icon {
  font-size: 18px;
  line-height: 1;
  text-align: center;
}

.planner-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.6rem;
}

.planner-form label {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.planner-form input {
  padding: 0.55rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
}

.planner-form .btn {
  grid-column: 1 / -1;
  justify-self: start;
}

.planner-stops {
  margin: 0.75rem 0 0;
  padding-left: 1.5rem;
}

.planner-stops li {
  padding: 0.4rem 0;
  border-bottom: 1px solid var(--color-border);
}

.passport-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.passport-heading h3 {
  margin: 0;
}

.passport-heading .btn {
  width: auto;
  padding: 0.45rem 0.75rem;
  font-size: 0.85rem;
}

.passport-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  margin: 1rem 0;
}

.passport-stat {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 0.6rem;
  text-align: center;
}

.passport-stat strong,
.passport-stat span {
  display: block;
}

.passport-stat strong {
  color: var(--color-primary-dark);
  font-size: 1.25rem;
}

.passport-stat span {
  color: var(--color-muted);
  font-size: 0.75rem;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.badge {
  background: #e7efe3;
  color: var(--color-primary-dark);
  border-radius: var(--radius);
  padding: 0.4rem 0.6rem;
  font-size: 0.8rem;
}

@media (max-width: 400px) {
  .planner-form,
  .passport-stats {
    grid-template-columns: 1fr 1fr;
  }

  .section-nav {
    gap: 1rem;
  }

  #map {
    height: min(62vh, 460px);
  }
}

@media (min-width: 800px) {
  .container {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(300px, 0.75fr);
    align-items: start;
  }

  .auth-panel,
  .search-panel,
  .status,
  .results {
    grid-column: 1 / -1;
  }

  .results {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(300px, 0.75fr);
    gap: 1rem;
  }

  .results > .location-card,
  .results > .deep-time-card,
  .results > .find-card,
  .results > .planner-card,
  .results > .passport-card {
    grid-column: 1 / -1;
  }

  #map,
  .time-map {
    height: clamp(340px, 48vh, 560px);
  }
}

/* --- Drop-pin modal --- */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  z-index: 1000;
}

.field-kit-mode {
  font-size: 18px;
}

.field-kit-mode .container {
  max-width: 900px;
}

.field-kit-mode .section-nav a:nth-child(n+3),
.field-kit-mode .school-rock-btn,
.field-kit-mode .advanced-toggle:first-of-type,
.field-kit-mode .deep-time-card,
.field-kit-mode .stratigraphy-card,
.field-kit-mode .units-card,
.field-kit-mode .mineral-reference-card,
.field-kit-mode .planner-card,
.field-kit-mode .passport-card {
  display: none;
}

.field-kit-mode .btn,
.field-kit-mode input,
.field-kit-mode select {
  min-height: 3rem;
}

.field-kit-mode #map {
  height: min(70vh, 620px);
}

/* The [hidden] attribute alone loses to the class rule above (same
   specificity, later in source order) — force it to actually hide. */
.modal-overlay[hidden] {
  display: none;
}

.modal {
  width: 100%;
  max-width: 400px;
}

.modal-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.modal-actions .btn {
  width: auto;
}

.school-rock-panel {
  position: fixed;
  z-index: 1100;
  top: 0;
  right: 0;
  width: min(440px, 100vw);
  height: 100vh;
  overflow-y: auto;
  background: var(--color-card);
  border-left: 1px solid var(--color-border);
  box-shadow: -8px 0 24px rgba(0, 0, 0, 0.12);
  padding: 1.25rem;
}

.school-rock-panel[hidden] {
  display: none;
}

.school-rock-header,
.passport-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.school-rock-header h2 {
  margin: 0;
  color: var(--color-primary-dark);
}

.eyebrow {
  margin: 0;
  color: var(--color-primary);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.icon-button {
  border: 0;
  background: transparent;
  font-size: 1.8rem;
  line-height: 1;
  color: var(--color-muted);
  cursor: pointer;
}

.school-rock-tabs {
  display: flex;
  gap: 0.5rem;
  margin: 1rem 0;
}

.school-rock-tabs .auth-tab {
  flex: 1;
}

.education-select-label {
  display: block;
  color: var(--color-muted);
  font-size: 0.85rem;
}

.education-select-label select {
  display: block;
  width: 100%;
  margin-top: 0.3rem;
  padding: 0.65rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: #fff;
  font-size: 1rem;
}

.education-content,
.education-list {
  margin: 0.9rem 0 1.25rem;
}

.education-content h3,
.education-list h3 {
  margin: 0 0 0.35rem;
  color: var(--color-primary-dark);
}

.education-content p,
.education-list p {
  margin: 0.4rem 0;
}

.education-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.85rem;
}

.education-list article {
  border-top: 1px solid var(--color-border);
  padding: 0.7rem 0;
}

.education-list article:first-child {
  border-top: 0;
}

.education-attribution {
  color: var(--color-muted);
  font-size: 0.75rem;
}

.trail-poi-list {
  padding-left: 1.2rem;
}

.trail-poi-link {
  border: 0;
  padding: 0;
  background: transparent;
  color: var(--color-primary-dark);
  text-decoration: underline;
  cursor: pointer;
  text-align: left;
}

.find-photo-preview {
  max-width: 100%;
  border-radius: var(--radius);
  margin: 0.5rem 0;
}

.find-marker-icon {
  background: transparent;
  border: 0;
  text-align: center;
}

.find-marker-icon img {
  width: 28px;
  height: 28px;
}

.fossil-marker-icon {
  font-size: 18px;
  line-height: 1;
  text-align: center;
}

#drop-pin-btn.active {
  background: var(--color-primary-dark);
  color: #fff;
}

/* Mobile-first responsiveness: on very small screens tighten padding/font size */
@media (max-width: 400px) {
  .app-header {
    padding: 1.5rem 0.75rem 0.75rem;
  }

  .card {
    padding: 1rem;
  }

  .search-form {
    flex-direction: column;
  }
}