/*
 * Socle commun
 * -------------
 * Mise en page, composants de formulaire et états interactifs.
 * Les choix visuels finaux sont centralisés dans theme.css.
 */
:root {
  --bg: #08111f;
  --panel: #101a2c;
  --panel2: #162237;
  --line: #2b3950;
  --text: #f3f7fb;
  --muted: #94a3b8;
  --aqua: #4fd1c5;
  --amber: #f3b743;
  --danger: #fb7185;
  --radius: 18px;
  color-scheme: dark;
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background:
    radial-gradient(circle at 20% -10%, #173154 0, transparent 34%), var(--bg);
  color: var(--text);
  min-height: 100vh;
}
main {
  width: min(1480px, calc(100% - 40px));
  margin: auto;
}
.eyebrow {
  color: var(--aqua);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  margin: 0 0 5px;
}
.runtime {
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 0.88rem;
}
.runtime span:first-child {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 14px var(--amber);
}
.runtime.ready span:first-child {
  background: var(--aqua);
  box-shadow: 0 0 14px var(--aqua);
}
main {
  padding: 24px 0 44px;
}
.upload-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 18px;
  align-items: center;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 15px 18px;
  margin-bottom: 18px;
}
.file-button,
.secondary-button,
.text-button {
  appearance: none;
  border: 0;
  font: inherit;
  cursor: pointer;
}
.file-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--aqua);
  color: #06131d;
  font-weight: 800;
  border-radius: 11px;
  padding: 12px 18px;
}
.file-button svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
}
#imageInput {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}
.file-meta {
  display: flex;
  flex-direction: column;
  min-width: 0;
}
.file-meta strong {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-meta span {
  color: var(--muted);
  font-size: 0.82rem;
  margin-top: 3px;
}
.secondary-button {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  font-weight: 700;
  border-radius: 10px;
  padding: 10px 14px;
}
.secondary-button:hover:not(:disabled) {
  border-color: var(--aqua);
  color: var(--aqua);
}
button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.image-panel {
  min-width: 0;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.panel-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 18px;
  border-bottom: 1px solid var(--line);
}
.panel-heading h2 {
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  margin: 0;
}
.panel-heading span {
  font-size: 0.78rem;
  color: var(--muted);
}
.canvas-stage {
  height: clamp(280px, 40vw, 570px);
  position: relative;
  display: grid;
  place-items: center;
  padding: 16px;
  background-color: #050a12;
  background-image:
    linear-gradient(45deg, #0c1421 25%, transparent 25%),
    linear-gradient(-45deg, #0c1421 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #0c1421 75%),
    linear-gradient(-45deg, transparent 75%, #0c1421 75%);
  background-size: 24px 24px;
  background-position:
    0 0,
    0 12px,
    12px -12px,
    -12px 0;
}
.canvas-stage canvas {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}
.empty-state {
  text-align: center;
  color: var(--muted);
}
.empty-state span {
  display: inline-grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border: 1px dashed var(--line);
  border-radius: 50%;
  color: var(--aqua);
  font-weight: 800;
}
.canvas-stage:not(.empty) .empty-state {
  display: none;
}
.processing {
  position: absolute;
  right: 16px;
  bottom: 16px;
  padding: 7px 10px;
  border-radius: 8px;
  background: #08111edb;
  color: var(--aqua);
  font-size: 0.78rem;
}
.workbench {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.section-title {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.section-title > span {
  display: grid;
  place-items: center;
  flex: 0 0 34px;
  height: 34px;
  border-radius: 9px;
  background: #213149;
  color: var(--aqua);
  font-weight: 900;
  font-size: 0.78rem;
}
.section-title h2 {
  font-size: 1.05rem;
  margin: 0;
}
.section-title p {
  font-size: 0.84rem;
  color: var(--muted);
  margin: 4px 0 0;
}
.section-title.compact > span {
  background: transparent;
  border: 1px solid var(--line);
}
.filter-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  border: 0;
  padding: 0;
  margin: 18px 0 22px;
}
.filter-options label {
  position: relative;
}
.filter-options input {
  position: absolute;
  opacity: 0;
}
.filter-options label > span {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px 15px;
  cursor: pointer;
  background: var(--panel2);
  transition: 0.18s ease;
}
.filter-options small {
  color: var(--muted);
  margin-top: 4px;
}
.filter-options input:checked + span {
  border-color: var(--aqua);
  box-shadow: inset 0 0 0 1px var(--aqua);
  background: #14313a;
}
.filter-options input:focus-visible + span,
.file-button:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 3px solid #4fd1c566;
  outline-offset: 2px;
}
.controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}
.control-block {
  background: #0c1626;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 17px;
}
.inline-fields {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: end;
  gap: 12px;
  margin-top: 17px;
}
.sigma-fields {
  grid-template-columns: 1fr 1fr;
}
.multiply {
  padding-bottom: 12px;
  color: var(--muted);
  font-weight: 900;
}
.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.field.full {
  margin-top: 17px;
}
.field span {
  font-size: 0.78rem;
  font-weight: 800;
  color: #cbd5e1;
}
.field input,
.field select,
.kernel-grid input {
  width: 100%;
  background: #08111f;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 10px 11px;
  font: inherit;
}
.border-demo {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: var(--muted);
  font-size: 0.78rem;
  margin-top: 13px;
}
.border-demo em {
  color: var(--amber);
  font-style: normal;
}
.check {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 13px;
  color: var(--muted);
  font-size: 0.84rem;
}
.check input {
  accent-color: var(--aqua);
  width: 17px;
  height: 17px;
}
.kernel-editor-block {
  grid-column: 1/-1;
}
.kernel-toolbar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  margin: 16px 0;
}
.kernel-toolbar span {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.84rem;
}
.kernel-toolbar strong {
  color: var(--amber);
}
.text-button {
  background: transparent;
  color: var(--aqua);
  font-weight: 750;
  padding: 9px 5px;
}
.kernel-scroll {
  overflow: auto;
  padding-bottom: 4px;
}
.kernel-grid {
  display: grid;
  gap: 6px;
  min-width: max-content;
}
.kernel-grid input {
  width: 74px;
  text-align: center;
  padding: 8px;
}
.validation {
  color: var(--danger);
  font-size: 0.8rem;
  min-height: 1.1em;
  margin: 8px 0 0;
}
.footer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--line);
  margin-top: 20px;
  padding-top: 14px;
}
.footer-actions span {
  color: var(--muted);
  font-size: 0.8rem;
}
.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;
}
[hidden] {
  display: none !important;
}
@media (max-width: 850px) {
  .comparison,
  .controls-grid {
    grid-template-columns: 1fr;
  }
  .filter-options {
    grid-template-columns: 1fr 1fr;
  }
  .canvas-stage {
    height: min(70vw, 460px);
  }
  .kernel-editor-block {
    grid-column: auto;
  }
}
@media (max-width: 560px) {
  main {
    width: min(100% - 22px, 1480px);
  }
  .runtime {
    max-width: 130px;
    text-align: right;
  }
  .upload-row {
    grid-template-columns: 1fr;
  }
  .file-button,
  .secondary-button {
    justify-content: center;
  }
  .filter-options {
    grid-template-columns: 1fr;
  }
  .workbench {
    padding: 15px;
  }
  .canvas-stage {
    height: 72vw;
  }
  .footer-actions {
    align-items: flex-start;
    gap: 10px;
    flex-direction: column;
  }
}

.filter-parameter-panel {
  margin-top: 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.parameter-content {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin-top: 18px;
}
.filter-parameter-panel[data-filter="gaussian"] .parameter-content {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.filter-parameter-panel[data-filter="median"]
  .parameter-section:first-child
  .inline-fields {
  grid-template-columns: 1fr;
}
.parameter-section {
  min-width: 0;
  padding: 4px 22px 4px 0;
  border-right: 1px solid var(--line);
}
.parameter-section + .parameter-section {
  padding-left: 22px;
}
.parameter-section:last-child {
  padding-right: 0;
  border-right: 0;
}
.parameter-heading h3 {
  font-size: 0.91rem;
  margin: 0;
}
.parameter-heading p {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 4px 0 0;
}
.parameter-section .field input,
.parameter-section .field select {
  background: #08111f;
}
.kernel-editor-block {
  grid-column: 1/-1;
  margin-top: 20px;
  padding-top: 20px !important;
  padding-left: 0 !important;
  border-top: 1px solid var(--line);
  border-right: 0;
}
.filter-parameter-panel[data-filter="convolution"] .kernel-editor-block {
  border-top: 1px solid var(--line);
}
@media (max-width: 1000px) {
  .filter-parameter-panel[data-filter="gaussian"] .parameter-content {
    grid-template-columns: 1fr 1fr;
  }
  .filter-specific {
    grid-column: 1/-1;
    border-top: 1px solid var(--line);
    border-right: 0;
  }
}
@media (max-width: 850px) {
  .parameter-content,
  .filter-parameter-panel[data-filter="gaussian"] .parameter-content {
    grid-template-columns: 1fr;
  }
  .parameter-section,
  .filter-specific {
    grid-column: auto;
    padding: 4px 0 18px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  .parameter-section + .parameter-section {
    padding: 18px 0;
  }
  .parameter-section:last-child {
    padding-bottom: 4px;
    border-bottom: 0;
  }
  .kernel-editor-block {
    margin-top: 0;
    padding: 18px 0 4px !important;
    border-top: 0;
  }
}
@media (max-width: 560px) {
  .filter-parameter-panel {
    padding-top: 16px;
  }
}