:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  --page: #f4f5f6;
  --surface: #ffffff;
  --surface-subtle: #f8fafb;
  --text: #1f2933;
  --muted: #5f6b76;
  --line: #d8dde2;
  --line-strong: #aeb7c0;
  --green: #19713d;
  --green-hover: #125c30;
  --blue: #2563eb;
  --blue-soft: #eaf1ff;
  --amber: #a15c00;
  --amber-soft: #fff6df;
  --red: #b42318;
  --red-soft: #fff0ee;
  --shadow: 0 1px 2px rgb(31 41 51 / 0.08), 0 8px 24px rgb(31 41 51 / 0.06);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--page);
  color: var(--text);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background: var(--page);
  font-size: 15px;
  line-height: 1.55;
}

button,
textarea,
input {
  font: inherit;
}

button,
.button {
  min-height: 42px;
}

button,
.button,
summary {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid #2563eb;
  outline-offset: 2px;
}

#file-input:focus-visible + label {
  outline: 3px solid #2563eb;
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 10px;
  left: 10px;
  padding: 9px 12px;
  border-radius: 4px;
  background: var(--text);
  color: white;
  transform: translateY(-160%);
}

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

.app-header,
.app-footer {
  padding-inline: max(20px, calc((100vw - 1180px) / 2));
}

.app-header {
  padding-top: 24px;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.header-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.brand-block h1,
.brand-block p,
.section-heading h2,
.section-heading p,
.app-footer p,
.status-line,
.input-hint,
.empty-state,
.success-state,
.field-note,
.field-group p {
  margin: 0;
}

.brand-block h1 {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 1.45rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.brand-block p,
.app-footer,
.input-hint,
.file-status,
.status-line,
.field-note {
  color: var(--muted);
  font-size: 0.875rem;
}

.language-picker {
  display: grid;
  grid-template-columns: 32px minmax(78px, auto) minmax(104px, auto);
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface-subtle);
}

.language-picker > .icon {
  margin-inline: 5px 3px;
}

.language-option {
  min-height: 34px;
  padding: 5px 10px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 650;
}

.language-option[aria-pressed="true"] {
  background: var(--blue-soft);
  color: #174ea6;
  box-shadow: inset 0 0 0 1px #b8cdf8;
}

.capability-list,
.input-support,
.value-list {
  list-style: none;
  padding: 0;
}

.capability-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 18px;
  margin: 20px 0 0;
  padding: 11px 0 13px;
  border-top: 1px solid #edf0f2;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.76rem;
}

.capability-list li::before {
  content: "•";
  margin-right: 7px;
  color: var(--green);
}

.input-band {
  width: 100%;
  padding: 34px max(20px, calc((100vw - 1180px) / 2)) 38px;
  border-bottom: 1px solid var(--line);
  background: var(--surface-subtle);
}

.workspace-inner,
.results-inner {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 22px;
}

.section-kicker {
  color: var(--blue);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.74rem;
  font-weight: 700;
}

.section-heading h2,
.results-inner > h2,
.error-panel h2 {
  margin: 3px 0 0;
  font-size: 1.12rem;
  letter-spacing: 0;
}

.input-support {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
  margin: 0;
}

.input-support li {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: white;
  color: var(--muted);
  font-size: 0.73rem;
}

label[for="certificate-input"] {
  display: block;
  margin-bottom: 7px;
  font-weight: 700;
}

#certificate-input {
  display: block;
  width: 100%;
  min-height: 230px;
  resize: vertical;
  padding: 15px 17px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: white;
  color: var(--text);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.82rem;
  line-height: 1.55;
}

#certificate-input::placeholder {
  color: #7a8792;
}

.input-hint {
  margin-top: 7px;
}

.input-actions,
.command-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.input-actions {
  margin-top: 18px;
  padding: 14px;
  border: 1px dashed #c29443;
  border-radius: 6px;
  background: var(--amber-soft);
}

.input-actions.is-dragging {
  border-color: var(--blue);
  background: var(--blue-soft);
}

.file-status {
  min-width: 0;
  flex: 1 1 240px;
}

.command-row {
  margin-top: 16px;
}

.status-line {
  flex: 1 1 300px;
  min-height: 24px;
  padding-left: 4px;
}

.status-line.is-error {
  color: var(--red);
  font-weight: 650;
}

.status-line.is-success {
  color: var(--green);
  font-weight: 650;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 13px;
  border-radius: 6px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.primary-button {
  min-width: 118px;
  border: 1px solid var(--green);
  background: var(--green);
  color: white;
}

.primary-button:hover:not(:disabled) {
  border-color: var(--green-hover);
  background: var(--green-hover);
}

.secondary-button,
.copy-button {
  border: 1px solid var(--line-strong);
  background: white;
  color: var(--text);
}

.secondary-button:hover,
.copy-button:hover {
  border-color: #7d8994;
  background: #f1f3f5;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.48;
}

.icon {
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}

.results-band {
  padding: 34px max(20px, calc((100vw - 1180px) / 2)) 52px;
}

.results-inner > h2 {
  margin-bottom: 6px;
}

.empty-state {
  padding: 28px 0;
  color: var(--muted);
}

.success-state {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-weight: 700;
}

.success-state .icon {
  padding: 2px;
  border-radius: 50%;
  background: #eaf7ef;
}

.result-metadata {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 20px 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--line);
}

.result-metadata .field-row {
  background: white;
}

.certificate-card {
  margin-top: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.certificate-card > h3 {
  margin: 0 0 18px;
  padding-bottom: 11px;
  border-bottom: 2px solid #c7d5eb;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 1rem;
  letter-spacing: 0;
}

.field-group {
  padding: 18px 0;
  border-top: 1px solid #edf0f2;
}

.field-group:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.field-group h4,
.field-group h5 {
  margin: 0 0 10px;
  letter-spacing: 0;
}

.field-group h4 {
  font-size: 0.94rem;
}

.field-group h5 {
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.79rem;
  text-transform: uppercase;
}

.field-list {
  margin: 0;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.34fr) minmax(0, 1fr);
  gap: 16px;
  padding: 8px 10px;
}

.field-row:nth-child(odd) {
  background: var(--surface-subtle);
}

.field-label {
  color: var(--muted);
  font-size: 0.79rem;
  font-weight: 700;
}

.field-value {
  min-width: 0;
  margin: 0;
}

.mono-value,
.json-output {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: 0.8rem;
}

.mono-value {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.value-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0;
}

.value-list li {
  max-width: 100%;
  padding: 4px 8px;
  border: 1px solid #c7d5eb;
  border-radius: 4px;
  background: var(--blue-soft);
}

.field-disclosure,
.json-disclosure {
  margin-top: 12px;
}

summary {
  width: fit-content;
  color: #174ea6;
  font-weight: 700;
}

details[open] > summary {
  margin-bottom: 12px;
}

.name-entry,
.extension-item {
  margin-top: 10px;
  border-left: 3px solid #c7d5eb;
}

.fingerprint-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  margin-bottom: 9px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.copy-button {
  min-width: 42px;
  min-height: 38px;
  padding: 7px 10px;
  font-size: 0.76rem;
}

.copy-button.is-copied {
  border-color: #8bc4a2;
  background: #eaf7ef;
  color: var(--green);
}

.json-disclosure {
  padding: 18px 0;
}

.json-disclosure .copy-button {
  margin-bottom: 10px;
}

.json-output {
  max-height: 520px;
  margin: 0;
  padding: 16px;
  overflow: auto;
  border: 1px solid #c7d5eb;
  border-radius: 6px;
  background: #f3f7fc;
  color: #243b53;
  white-space: pre-wrap;
}

.error-panel {
  padding: 18px;
  border-left: 4px solid var(--red);
  background: var(--red-soft);
}

.error-panel h2 {
  color: var(--red);
}

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

.app-footer {
  padding-top: 20px;
  padding-bottom: 24px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

@media (max-width: 720px) {
  .app-header {
    padding-top: 18px;
  }

  .header-inner,
  .section-heading {
    align-items: stretch;
    flex-direction: column;
  }

  .language-picker {
    align-self: flex-start;
    max-width: 100%;
  }

  .input-support {
    justify-content: flex-start;
  }

  .result-metadata,
  .field-row {
    grid-template-columns: 1fr;
    gap: 3px;
  }

  .fingerprint-row {
    grid-template-columns: 1fr auto;
  }

  .fingerprint-row .field-value {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .fingerprint-row .copy-button {
    grid-column: 2;
    grid-row: 1;
  }

  .certificate-card {
    padding: 18px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}