* {
  box-sizing: border-box;
}

:root {
  --bg: #f3f5f7;
  --panel: #ffffff;
  --panel-soft: #f8fafc;

  --text: #161616;
  --muted: #56606c;

  --line: #d8dee6;
  --line-strong: #c6d0db;

  --primary: #1f4e79;
  --primary-dark: #173a5a;

  --secondary: #e9eef3;
  --secondary-text: #1f2d3d;

  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.05);
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 44px rgba(0, 0, 0, 0.12);

  --radius-sm: 12px;
  --radius: 18px;
  --radius-lg: 24px;

  --focus-ring: 0 0 0 3px rgba(31, 78, 121, 0.18);
}

html.theme-dark-preload body {
  background: #0f1115;
  color: #f3f5f7;
}

body.theme-dark {
  --bg: #0f1115;
  --panel: #171a21;
  --panel-soft: #131720;

  --text: #f3f5f7;
  --muted: #c2cad4;

  --line: #36404d;
  --line-strong: #465263;

  --primary: #5ea4dd;
  --primary-dark: #4a8ec4;

  --secondary: #242a35;
  --secondary-text: #eef3f8;

  --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.18);
  --shadow: 0 12px 30px rgba(0, 0, 0, 0.24);
  --shadow-lg: 0 20px 44px rgba(0, 0, 0, 0.34);

  --focus-ring: 0 0 0 3px rgba(94, 164, 221, 0.22);
}

html {
  font-size: 18px;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.page {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
}

.atlas-page {
  max-width: 1040px;
}

.page-header {
  margin-bottom: 24px;
}

.site-logo {
  display: block;
  max-width: 300px;
  width: 100%;
  height: auto;
  margin-bottom: 12px;
}

.site-logo-dark {
  display: none;
}

body.theme-dark .site-logo-light,
html.theme-dark-preload .site-logo-light {
  display: none;
}

body.theme-dark .site-logo-dark,
html.theme-dark-preload .site-logo-dark {
  display: block;
}

.intro {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
}

.theme-switch {
  margin-top: 18px;
}

.page-back {
  margin-bottom: 12px;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  background: var(--secondary);
  color: var(--secondary-text);
  text-decoration: none;
  font-weight: 600;
}

.back-link:hover,
.back-link:focus-visible {
  background: #dde6ee;
}

body.theme-dark .back-link:hover,
body.theme-dark .back-link:focus-visible {
  background: #2c3543;
}

.back-link:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
  box-shadow: none;
}

h1 {
  margin: 0 0 12px;
  font-size: 2.3rem;
  line-height: 1.1;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.22rem;
}

h3 {
  margin: 18px 0 8px;
  font-size: 1rem;
}

.panel {
  background: var(--panel);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow);
  margin-bottom: 22px;
  border: 1px solid var(--line);
}

.panel-head {
  margin-bottom: 14px;
}

.preview-panel canvas {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 18px;
  border: 1px solid var(--line-strong);
  /* Canvas-Hintergrund: mittleres Neutralgrau – simuliert das "Nicht-Vorhandensein"
     bei Skotomen. Durch eraseScotomaArea() radiierte Bereiche zeigen diese
     Farbe statt einer harten Kontrastfläche, was der wissenschaftlichen
     Realität näher kommt (Roux-Sibilon et al. 2019). */
  background: #a0a8b0;
  box-shadow: var(--shadow-lg);
}

canvas.clickable {
  cursor: crosshair;
}

.preview-hint {
  max-width: 760px;
  margin: 14px auto 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.status {
  margin: 10px 0 0;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: var(--panel-soft);
  font-size: 0.96rem;
  border: 1px solid var(--line-strong);
}

.status:focus {
  outline: none;
  box-shadow: var(--focus-ring);
}

.controls-panel label {
  display: block;
  margin: 14px 0 6px;
  font-weight: 600;
}

.controls-panel input[type="file"],
.controls-panel select {
  width: 100%;
  min-height: 48px;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
  padding: 10px 12px;
  background: var(--panel);
  font: inherit;
  color: inherit;
}

.controls-panel select:focus-visible,
.controls-panel input[type="file"]:focus-visible,
.setting-row input[type="range"]:focus-visible,
.dropzone:focus-visible,
.atlas-card__link:focus-visible,
button:focus-visible,
.skip-link:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 3px;
  box-shadow: none;
}

#upload {
  display: none;
}

.dropzone {
  margin-top: 16px;
  padding: 26px 18px;
  border-radius: 18px;
  border: 2px dashed #7ea2c1;
  background: linear-gradient(180deg, #f9fcff, #f2f8fd);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

body.theme-dark .dropzone {
  background: linear-gradient(180deg, #182230 0%, #141c28 100%);
  border-color: #4f7398;
}

.dropzone:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.dropzone strong,
.dropzone span,
.dropzone small {
  display: block;
}

.dropzone strong {
  font-size: 1rem;
}

.dropzone span {
  margin-top: 6px;
}

.dropzone small {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.94rem;
}

.dropzone.is-active {
  border-color: var(--primary);
  background: #e8f2fb;
}

body.theme-dark .dropzone.is-active {
  background: #203044;
}

.field-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
}

#loadDemo {
  margin-top: 12px;
}

.actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin-top: 16px;
}

.actions > * {
  min-width: 0;
}

button {
  appearance: none;
  border: 0;
  min-height: 46px;
  border-radius: 12px;
  padding: 10px 14px;
  background: var(--primary);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(31, 78, 121, 0.18);
  width: 100%;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  transition: background 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

button:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
}

.button-secondary {
  background: var(--secondary);
  color: var(--secondary-text);
  box-shadow: none;
}

.button-secondary:hover {
  background: #dde6ee;
}

body.theme-dark .button-secondary:hover {
  background: #2c3543;
}

.effect-settings {
  margin-top: 20px;
  padding: 16px;
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  background: var(--panel-soft);
}

.setting-row {
  margin-top: 12px;
}

.setting-row label {
  display: block;
  margin-bottom: 4px;
}

.setting-value {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 0.94rem;
  color: var(--muted);
}

.setting-row input[type="range"] {
  width: 100%;
}

.info-panel {
  line-height: 1.65;
  background: linear-gradient(180deg, var(--panel), var(--panel-soft));
  border: 1px solid var(--line-strong);
}

.info-panel h2 {
  margin-bottom: 10px;
}

.info-panel ul {
  padding-left: 20px;
}

.info-panel ul li::marker {
  color: var(--primary);
}

.atlas-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.atlas-card {
  background: var(--panel);
  border-radius: 20px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
}

.atlas-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.atlas-card:focus-within {
  border-color: var(--primary);
  box-shadow: var(--focus-ring), var(--shadow-sm);
}

.atlas-card__bar {
  height: 10px;
  width: 100%;
}

.atlas-card__body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-height: 230px;
}

.atlas-card__label {
  display: inline-block;
  width: fit-content;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--secondary);
  color: var(--secondary-text);
  font-size: 0.82rem;
  font-weight: 700;
}

.atlas-card__title {
  margin: 0;
  font-size: 1.2rem;
}

.atlas-card__text {
  margin: 0;
  color: var(--muted);
  flex: 1;
}

.atlas-card__link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  max-width: 100%;
}

.atlas-card__link:hover,
.atlas-card__link:focus-visible {
  background: var(--primary-dark);
}

a.atlas-card__link {
  text-decoration: none;
}

.atlas-card--rp .atlas-card__bar { background: #1f4e79; }
.atlas-card--amd .atlas-card__bar { background: #0f8b8d; }
.atlas-card--glaukom .atlas-card__bar { background: #34495e; }
.atlas-card--retinopathie .atlas-card__bar { background: #8e3b46; }
.atlas-card--dmo .atlas-card__bar { background: #5c4d9d; }
.atlas-card--katarakt .atlas-card__bar { background: #b8860b; }
.atlas-card--stargardt .atlas-card__bar { background: #2f7f7f; }
.atlas-card--lhon .atlas-card__bar { background: #2c6e91; }
.atlas-card--hemianopsie .atlas-card__bar { background: #6b4f2a; }
.atlas-card--keratokonus .atlas-card__bar { background: #8b5a2b; }
.atlas-card--netzhautabloesung .atlas-card__bar { background: #9b2f2f; }
.atlas-card--zsd .atlas-card__bar { background: #6c7a89; }
.atlas-card--diplopie .atlas-card__bar { background: #4b5bdc; }

.app-footer {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid rgba(0, 0, 0, 0.08);
  font-size: 14px;
  line-height: 1.55;
  color: #6b6b6b;
}

.app-footer a {
  color: var(--primary);
  font-weight: 600;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.app-footer a:hover,
.app-footer a:focus-visible {
  color: var(--primary-dark);
}

body.theme-dark .app-footer a {
  color: #8ec5f0;
}

body.theme-dark .app-footer a:hover,
body.theme-dark .app-footer a:focus-visible {
  color: #b7dcf7;
}

.theme-dark .app-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  color: #bcc4ce;
}

.footer-note,
.atlas-intro-panel p,
.info-panel p {
  max-width: 72ch;
}

.hero-panel {
  background: var(--panel);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
  text-align: left;
}

.hero-panel--compact {
  padding: 20px 22px;
}

.page-header--atlas .hero-panel {
  max-width: 1140px;
}

.page-header--simulator .hero-panel {
  width: 100%;
}

.hero-panel .site-logo {
  margin: 0 0 16px;
  max-width: 220px;
}

.page-header--simulator .hero-panel .site-logo {
  margin: 0 0 12px;
  max-width: 300px;
}

.hero-panel .intro {
  max-width: 520px;
  margin: 0 0 18px;
  text-align: left;
}

.page-header--simulator .hero-panel .intro {
  max-width: none;
  margin: 0;
}

.hero-panel .atlas-card__link {
  display: inline-flex;
  margin-top: 10px;
}

.control-group + .control-group {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.controls-panel .control-group[aria-labelledby="actions-heading"] {
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.control-group__title {
  margin: 0 0 12px;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--text);
  font-weight: 700;
}

.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1000;
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  font-weight: 700;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

@media (min-width: 700px) {
  .page {
    padding: 26px;
  }

  .field-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .atlas-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) and (min-height: 700px) {
  .page {
    display: grid;
    grid-template-columns: 380px minmax(0, 1fr);
    gap: 26px;
    align-items: start;
  }

  .atlas-page {
    display: block;
  }

  .page-header {
    grid-column: 1 / -1;
  }

  .controls-panel {
    grid-column: 1;
    grid-row: 2;
  }

  .info-panel {
    grid-column: 1;
    grid-row: 3;
  }

  .app-footer {
    grid-column: 1 / -1;
    margin-top: 40px;
  }

  .preview-panel {
    grid-column: 2;
    grid-row: 2;
    align-self: start;
    position: sticky;
    top: 24px;
  }

  .atlas-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .atlas-card,
  .dropzone,
  button,
  .back-link {
    transition: none;
  }

  .atlas-card:hover,
  .dropzone:hover,
  button:hover {
    transform: none;
  }

  .skip-link {
    transition: none;
  }
}

.intro-guide__content {
  display: grid;
  gap: 20px;
  align-items: start;
}

.intro-guide__text p,
.intro-guide__text li {
  max-width: 72ch;
}

.intro-guide__mascot {
  justify-self: center;
  width: 100%;
  max-width: 220px;
  overflow: hidden;
}

.intro-guide__mascot img {
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: contain;
  display: block;
}

@media (min-width: 800px) {
  .intro-guide__content {
    grid-template-columns: minmax(0, 1fr) 220px;
  }

  .intro-guide__mascot {
    justify-self: end;
  }
}

@media (max-width: 799px) {
  .intro-guide__mascot {
    max-width: 180px;
  }

  .intro-guide__mascot img {
    max-height: 220px;
  }
}

.panel--project {
  background: linear-gradient(180deg, var(--panel), var(--panel-soft));
  border: 1px solid var(--line-strong);
  position: relative;
}

.panel--project a {
  color: var(--primary);
  font-weight: 600;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

.panel--project a:hover,
.panel--project a:focus-visible {
  color: var(--primary-dark);
}

body.theme-dark .panel--project a {
  color: #8ec5f0;
}

body.theme-dark .panel--project a:hover,
body.theme-dark .panel--project a:focus-visible {
  color: #b7dcf7;
}

.panel--project::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  background: var(--primary);
}

.panel--project h2 {
  margin-bottom: 14px;
}

.panel--project h3 {
  margin-top: 18px;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 700;
}

.back-to-preview {
  position: fixed;
  right: 16px;
  bottom: calc(env(safe-area-inset-bottom) + 84px);
  z-index: 1200;
  min-height: 44px;
  width: auto;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-lg);

  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(10px);
  transition:
    opacity 0.18s ease,
    transform 0.18s ease,
    visibility 0.18s ease;
}

.back-to-preview.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

@media (min-width: 900px) {
  .back-to-preview {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .back-to-preview {
    transition: none;
    transform: none;
  }
}
/* ===========================================================================
 * Stadium-Buttons (Frühstadium / Mittleres Stadium / Spätstadium)
 * Erscheinen bei progressiven Erkrankungen statt einzelner Regler.
 * =========================================================================*/

.stage-buttons {
  margin-bottom: 14px;
}

.stage-buttons__heading {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.stage-buttons__group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

/* CVD-Gruppen haben genau 3 Buttons – gleichmäßige 3-Spalten-Verteilung.
   Auf Mobile (< 400 px) wird jeder Button zur vollen Breite. */
.stage-buttons__group .stage-btn {
  flex: 1 1 calc(33.333% - 6px);
  min-width: 80px;
}

@media (max-width: 399px) {
  .stage-buttons__group .stage-btn {
    flex: 1 1 100%;
  }
}

.stage-btn {
  flex: 1 1 auto;
  min-width: 100px;
  min-height: 44px;
  padding: 8px 12px;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--line-strong);
  background: var(--panel);
  color: var(--secondary-text);
  cursor: pointer;
  transition: all 0.15s;
  text-align: center;
  line-height: 1.2;
}

.stage-btn:hover {
  background: var(--panel-soft);
  border-color: var(--primary);
}

.stage-btn.is-active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: var(--focus-ring);
}

.stage-btn:focus-visible {
  outline: 3px solid var(--primary);
  outline-offset: 2px;
}

/* Dark mode wird über Variablen automatisch behandelt –
   nur die aktive-Button-Schrift-Farbe explizit setzen */
body.theme-dark .stage-btn.is-active {
  color: #fff;
}

/* ===========================================================================
 * Erweiterte Einstellungen (ausklappbar via <details>)
 * =========================================================================*/

.advanced-settings {
  margin-top: 6px;
  border-top: 1px solid var(--line);
  padding-top: 10px;
}

.advanced-settings__summary {
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--muted);
  padding: 6px 0;
  list-style: none;
  user-select: none;
  -webkit-user-select: none;
}

.advanced-settings__summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform 0.15s;
  color: var(--muted);
}

.advanced-settings[open] > .advanced-settings__summary::before {
  transform: rotate(90deg);
}

.advanced-settings__summary::-webkit-details-marker {
  display: none;
}

.advanced-settings__summary:hover {
  color: var(--secondary-text);
}

.advanced-settings__summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

.advanced-settings__body {
  padding-top: 8px;
}

/* Visually-hidden: Inhalte für Screenreader sichtbar, visuell unsichtbar */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Vollbild-Modus für Vorschau (V1.7) ──────────────────────────────
   Bei aktivem Vollbild zentrieren wir den Canvas und blenden alle
   anderen Panel-Elemente bis auf das Bild aus. */
.preview-panel--fullscreen {
  display: flex !important;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: #000;
  padding: 20px;
}
.preview-panel--fullscreen canvas {
  max-height: 100vh;
  max-width: 100vw;
  width: auto !important;
  height: auto !important;
  object-fit: contain;
}
.preview-panel--fullscreen .panel-head,
.preview-panel--fullscreen .preview-hint {
  display: none;
}

/* Fullscreen API native pseudo-class für moderne Browser */
.preview-panel:fullscreen {
  background: #000;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.preview-panel:fullscreen canvas {
  max-height: 100vh;
  max-width: 100vw;
  width: auto !important;
  height: auto !important;
}

/* ── Camera-Aufnahme Modal (V1.7) ─────────────────────────────────────
   Vollbild-Overlay mit Live-Vorschau und Auslöse-Button. */
.camera-modal {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.92);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.camera-modal__inner {
  background: var(--panel);
  color: var(--text);
  border-radius: 14px;
  padding: 16px;
  max-width: 720px;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}
.camera-modal__video-wrap {
  position: relative;
  width: 100%;
  background: #000;
  border-radius: 10px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.camera-modal__video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.camera-modal__buttons {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}
.camera-modal__buttons button {
  min-height: 44px;
  padding: 8px 16px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  cursor: pointer;
  font-size: 1rem;
}