:root {
  color-scheme: dark;
  --bg: #050913;
  --bg-surface: #0e1629;
  --bg-elevated: #141f38;
  --bg-highlight: linear-gradient(135deg, rgba(123, 220, 181, 0.12), rgba(91, 146, 255, 0.12));
  --brand: #7bdcb5;
  --brand-strong: #64c3a0;
  --text: #f5f7fb;
  --text-muted: rgba(245, 247, 251, 0.72);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(123, 220, 181, 0.4);
  --shadow: 0 24px 60px rgba(3, 10, 25, 0.7);
  --font-sans: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: radial-gradient(circle at top left, #12223f, var(--bg) 65%);
  font-family: var(--font-sans);
  color: var(--text);
}

body {
  display: flex;
  flex-direction: column;
}

.page-header,
.page-footer {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 1.5rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.page-header {
  padding-top: 2.5rem;
}

.page-header__brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* Logo: prefer white foreground on dark bg; keep transparency */
.brand-logo-img {
  height: 2rem;
  width: auto;
  display: block;
  /* Convert dark logo artwork to white while preserving transparency */
  filter: brightness(0) invert(1);
}

.page-header__analytics {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: rgba(15, 26, 48, 0.85);
  border: 1px solid rgba(123, 220, 181, 0.2);
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 200ms ease, border-color 200ms ease, background 200ms ease;
}

.page-header__analytics.is-online {
  color: var(--text);
  border-color: rgba(123, 220, 181, 0.6);
  background: rgba(25, 44, 74, 0.9);
}

.status-dot {
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: rgba(123, 220, 181, 0.2);
  box-shadow: 0 0 0 0 rgba(123, 220, 181, 0.3);
  transition: background 200ms ease, box-shadow 200ms ease;
}

.page-header__analytics.is-online .status-dot {
  background: var(--brand);
  box-shadow: 0 0 0 6px rgba(123, 220, 181, 0.18);
}

.page {
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 0 2rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 3.5rem;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: center;
  padding: 2.5rem;
  border-radius: 2rem;
  background: linear-gradient(135deg, rgba(123, 220, 181, 0.16), rgba(91, 146, 255, 0.12));
  box-shadow: var(--shadow);
}

.hero__title {
  margin: 0;
  font-size: clamp(2.5rem, 4vw, 3.5rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hero__subtitle {
  margin: 1rem 0 0;
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 36ch;
}

.hero__badge {
  justify-self: end;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: rgba(8, 16, 31, 0.65);
  border: 1px solid rgba(123, 220, 181, 0.4);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.flow-step {
  position: relative;
  padding: 2.5rem;
  border-radius: 1.5rem;
  background: var(--bg-surface);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.flow-step.is-locked {
  opacity: 0.55;
  pointer-events: none;
  filter: saturate(0.8);
  transition: opacity 200ms ease, filter 200ms ease;
}

.flow-step::before {
  content: "";
  position: absolute;
  left: 3.5rem;
  top: -2.5rem;
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(to bottom, rgba(123, 220, 181, 0.4), transparent);
  opacity: 0.7;
}

.flow-step:first-of-type::before {
  display: none;
}

.flow-step__header {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 1.75rem;
}

.flow-step__counter {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  flex-shrink: 0;
  border-radius: 1rem;
  background: rgba(123, 220, 181, 0.18);
  border: 1px solid rgba(123, 220, 181, 0.32);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.flow-step__description {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  max-width: 65ch;
  line-height: 1.5;
}

.upload__dropzone {
  position: relative;
  display: grid;
  gap: 1rem;
  place-items: center;
  padding: 3rem 2rem;
  border-radius: 1.25rem;
  border: 2px dashed rgba(123, 220, 181, 0.4);
  background: rgba(10, 19, 36, 0.65);
  text-align: center;
  cursor: pointer;
  transition: border-color 200ms ease, background 200ms ease, transform 200ms ease;
}

.upload__dropzone.is-hovered {
  border-color: rgba(123, 220, 181, 0.9);
  background: rgba(18, 36, 65, 0.85);
  transform: translateY(-2px);
}

.upload__input {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.upload__illustration {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 1.25rem;
  background: var(--bg-highlight);
  border: 1px solid rgba(123, 220, 181, 0.3);
  display: grid;
  place-items: center;
}

.upload__illustration::before {
  content: "";
  width: 1.75rem;
  height: 2rem;
  background: linear-gradient(180deg, rgba(123, 220, 181, 0.4), rgba(123, 220, 181, 0.75));
  mask: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="white"%3E%3Cpath d="M12 3a1 1 0 0 1 1 1v9.586l2.293-2.293a1 1 0 0 1 1.414 1.414l-4.001 4a1 1 0 0 1-1.414 0l-4-4a1 1 0 1 1 1.414-1.414L11 13.586V4a1 1 0 0 1 1-1Zm-7 14a1 1 0 0 1 1-1h12a1 1 0 1 1 0 2H6a1 1 0 0 1-1-1Z"/%3E%3C/svg%3E') center / contain no-repeat;
}

.upload__text {
  display: grid;
  gap: 0.25rem;
}

.upload__text strong {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.upload__text span {
  color: var(--text-muted);
  font-size: 0.95rem;
}

.upload__hint {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.status-panel {
  display: grid;
  gap: 1.5rem;
  padding: 1.75rem;
  border-radius: 1.25rem;
  background: rgba(8, 14, 27, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

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

.status-panel__label {
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  color: var(--text-muted);
}

.status-panel__value {
  font-size: 1.05rem;
}

.status-progress {
  position: relative;
  width: 6rem;
  height: 6rem;
  margin: 0 auto;
  display: grid;
  place-items: center;
}

.status-progress__spinner {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid rgba(255, 255, 255, 0.18);
  border-top-color: var(--brand);
  animation: spin 1.2s linear infinite;
  animation-play-state: paused;
  opacity: 0.35;
  transition: opacity 200ms ease, border-top-color 200ms ease;
}

.status-progress__value {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.status-progress.is-active .status-progress__spinner {
  animation-play-state: running;
  opacity: 0.9;
  border-top-color: var(--brand-strong);
}

.results {
  display: grid;
  gap: 1.5rem;
}

.result-card {
  padding: 1.75rem;
  border-radius: 1.25rem;
  background: rgba(10, 19, 36, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  display: grid;
  gap: 0.75rem;
}

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

.result-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-card__list {
  margin: 0.5rem 0 0;
  padding-left: 1.2rem;
  color: var(--text-muted);
}

.results__placeholder {
  margin: 0;
  padding: 1.25rem;
  border-radius: 1rem;
  background: rgba(12, 20, 37, 0.65);
  border: 1px dashed rgba(255, 255, 255, 0.08);
  text-align: center;
  color: var(--text-muted);
}

.result-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(123, 220, 181, 0.12);
  border: 1px solid rgba(123, 220, 181, 0.28);
  color: var(--brand);
}

.result-card--warning .result-card__badge {
  background: rgba(255, 186, 99, 0.12);
  border-color: rgba(255, 186, 99, 0.35);
  color: #ffba63;
}

.result-card--critical .result-card__badge {
  background: rgba(255, 120, 120, 0.12);
  border-color: rgba(255, 120, 120, 0.35);
  color: #ff7878;
}

.flow-step--cta {
  background: linear-gradient(135deg, rgba(123, 220, 181, 0.2), rgba(91, 146, 255, 0.2));
  border: 1px solid rgba(123, 220, 181, 0.4);
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.9rem 1.8rem;
  border-radius: 999px;
  border: none;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: linear-gradient(135deg, #7bdcb5, #5b92ff);
  color: #031022;
  cursor: pointer;
  transition: transform 200ms ease, box-shadow 200ms ease, filter 200ms ease;
  box-shadow: 0 12px 32px rgba(5, 13, 28, 0.4);
}

.button[disabled] {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

.button:not([disabled]):hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 40px rgba(7, 16, 35, 0.5);
}

.cta__note {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.page-footer {
  margin-top: auto;
  padding-bottom: 2.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.page-footer nav {
  display: flex;
  gap: 1rem;
}

.page-footer a {
  color: inherit;
  text-decoration: none;
  position: relative;
}

.page-footer a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 1px;
  background: rgba(123, 220, 181, 0.4);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 200ms ease;
}

.page-footer a:hover::after {
  transform: scaleX(1);
}

/* JSON viewer for raw validation output */
.json-card {
  margin-top: 1.25rem;
  border-radius: 1rem;
  background: rgba(8, 14, 27, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.json-card > summary {
  list-style: none;
  cursor: pointer;
  padding: 0.9rem 1.1rem;
  background: rgba(16, 26, 47, 0.85);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  font-weight: 600;
  letter-spacing: 0.04em;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.json-card > summary::-webkit-details-marker { display: none; }

.json-card__toolbar {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.json-card__btn {
  appearance: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(20, 32, 58, 0.85);
  color: var(--text);
  border-radius: 0.5rem;
  font-size: 0.85rem;
  padding: 0.35rem 0.6rem;
  cursor: pointer;
}

.json-card__btn:hover {
  border-color: rgba(123, 220, 181, 0.45);
}

.json-card pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow: auto;
  line-height: 1.45;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size: 0.9rem;
  color: #e6edf3;
}

@media (max-width: 900px) {
  .page-header,
  .page {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .hero {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__badge {
    justify-self: center;
  }

  .flow-step::before {
    left: 2.5rem;
  }
}

@media (max-width: 600px) {
  .page-header,
  .page-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .page {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
    gap: 2.5rem;
  }

  .flow-step {
    padding: 2rem;
  }

  .flow-step__header {
    flex-direction: column;
    gap: 1rem;
  }

  .flow-step::before {
    display: none;
  }

  .status-panel__row {
    flex-direction: column;
    align-items: flex-start;
  }

  .status-panel__value {
    font-size: 0.95rem;
  }
}

/* Smoke test landing page */
.smoke-page {
  width: min(960px, 100%);
  margin: 0 auto;
  padding: 0 2rem 5rem;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.smoke-hero {
  padding: clamp(2rem, 4vw, 3.5rem);
  border-radius: 2rem;
  background: linear-gradient(140deg, rgba(123, 220, 181, 0.18), rgba(91, 146, 255, 0.14));
  box-shadow: var(--shadow);
}

.smoke-hero__title {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 3.25rem);
  letter-spacing: -0.015em;
  line-height: 1.05;
}

.smoke-hero__subtitle {
  margin-top: 1.25rem;
  font-size: 1.1rem;
  max-width: 42ch;
  color: var(--text-muted);
}

.smoke-options {
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}

.smoke-section-heading > h2 {
  margin: 0;
  font-size: 1.75rem;
}

.smoke-section-heading > p {
  margin: 0.75rem 0 0;
  color: var(--text-muted);
  max-width: 48ch;
}

.smoke-options__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 220ms ease, transform 220ms ease;
}

.smoke-options__grid[hidden] {
  display: none !important;
}

.smoke-options__grid.is-hidden {
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
}

.smoke-option-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.75rem;
  border-radius: 1.5rem;
  border: 1px solid rgba(123, 220, 181, 0.24);
  background: rgba(8, 16, 31, 0.65);
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: transform 200ms ease, border-color 200ms ease, box-shadow 200ms ease, background 200ms ease;
}

.smoke-option-card:hover,
.smoke-option-card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(123, 220, 181, 0.6);
  box-shadow: 0 18px 40px rgba(9, 20, 40, 0.6);
  background: rgba(12, 22, 39, 0.85);
  outline: none;
}

.smoke-option-card:focus-visible {
  box-shadow: 0 0 0 3px rgba(123, 220, 181, 0.35);
}

.smoke-option-card__title {
  font-size: 1.25rem;
  font-weight: 600;
}

.smoke-option-card__description {
  color: var(--text-muted);
  line-height: 1.5;
}

.smoke-feedback {
  padding: 2rem;
  border-radius: 1.5rem;
  border: 1px solid rgba(123, 220, 181, 0.28);
  background: rgba(10, 18, 32, 0.88);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 220ms ease, transform 220ms ease;
}

.smoke-feedback.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.smoke-feedback__title {
  margin: 0 0 0.75rem;
  font-size: 1.4rem;
}

.smoke-feedback__message {
  margin: 0;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.smoke-feedback__cta a {
  color: var(--brand);
  font-weight: 600;
}

.smoke-legal {
  margin-top: 3rem;
  padding: 2.25rem 2rem;
  border-radius: 1.5rem;
  border: 1px solid rgba(123, 220, 181, 0.2);
  background: rgba(8, 16, 31, 0.75);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 200ms ease, transform 200ms ease;
}

.smoke-legal[hidden] {
  display: none;
}

.smoke-legal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.smoke-legal h2 {
  margin: 0;
  font-size: 1.65rem;
}

.smoke-legal p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.6;
}

.smoke-legal ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.smoke-legal code {
  padding: 0.1rem 0.35rem;
  border-radius: 0.4rem;
  background: rgba(123, 220, 181, 0.18);
  color: var(--text);
}

@media (max-width: 640px) {
  .page-header,
  .page-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .smoke-page {
    padding: 0 1.5rem 4rem;
    gap: 2.5rem;
  }

  .smoke-hero {
    padding: 2rem;
  }
}

.footer-privacy-note { margin-top: 0.5rem; color: var(--text-muted); font-size: 0.9rem; }