:root {
  --bg: #1f1f1f;
  --card: #444;
  --border: #3a3a3a;
  --text: #eee;
  --muted: #d5d5d5;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --focus-glow: rgba(59, 130, 246, 0.35);
  --ready: #34d399;
  --ready-hover: #10b981;
  --success: #ade878;
  --error: #ff4e4e;
  --radius: 18px;
  --max-width: 720px;
  --card-surface: linear-gradient(180deg, #4a4a4a, #404040);
  --zone-subtitle: #e0e0e0;
  --result-bg: #2f2f2f;
  --result-text: #e5e5e5;
  --panel-bg: rgba(255, 255, 255, 0.03);
  --panel-inner-bg: rgba(255, 255, 255, 0.02);
  --btn-disabled-bg: #5b616d;
  --btn-disabled-text: #d9dde4;
  --copy-bg: rgba(255, 255, 255, 0.02);
  --copy-hover: rgba(59, 130, 246, 0.2);
  --service-chip-bg: rgba(59, 130, 246, 0.08);
  --service-chip-text: #dbeafe;
  --link: #bfdbfe;
  --link-hover: #93c5fd;
}

* {
  box-sizing: border-box;
}

:root[data-theme="light"] {
  --bg: #f1f3f6;
  --card: #f7f8fa;
  --border: #d5dce6;
  --text: #132942;
  --muted: #5a6d84;
  --card-surface: linear-gradient(180deg, #f9fafb, #f2f5f8);
  --zone-subtitle: #435f7f;
  --result-bg: #e9eef5;
  --result-text: #1e3350;
  --panel-bg: rgba(37, 99, 235, 0.045);
  --panel-inner-bg: rgba(250, 252, 255, 0.88);
  --btn-disabled-bg: #b6c3d4;
  --btn-disabled-text: #355171;
  --copy-bg: rgba(250, 252, 255, 0.88);
  --copy-hover: rgba(59, 130, 246, 0.12);
  --service-chip-bg: rgba(59, 130, 246, 0.1);
  --service-chip-text: #27496f;
  --link: #2563eb;
  --link-hover: #1d4ed8;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(980px 520px at 0% -10%, rgba(59, 130, 246, 0.14), transparent 45%),
    radial-gradient(780px 420px at 100% 0%, rgba(16, 185, 129, 0.08), transparent 42%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

.container {
  min-height: 100dvh;
  width: min(var(--max-width), 100%);
  margin: 0 auto;
  padding: 52px 22px 34px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 24px;
  position: relative;
}

.site-header {
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 4px;
  position: relative;
  padding-top: 8px;
}

.site-header h1 {
  margin: 0;
  font-family: "Inter", "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: clamp(2rem, 4.7vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  font-weight: 600;
}

.variant-label {
  margin: 0;
  align-self: center;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #bfdbfe;
  background: rgba(59, 130, 246, 0.16);
  border: 1px solid rgba(59, 130, 246, 0.35);
  border-radius: 999px;
  padding: 4px 10px;
}

:root[data-theme="light"] .variant-label {
  color: #1f3f66;
  background: rgba(59, 130, 246, 0.12);
  border-color: rgba(37, 99, 235, 0.28);
}

.tagline {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.08rem);
  max-width: 62ch;
  margin-left: auto;
  margin-right: auto;
}

main {
  display: flex;
}

.card {
  width: 100%;
  background: var(--card-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(24px, 4.5vw, 38px);
  box-shadow:
    0 24px 44px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
  position: relative;
}

:root[data-theme="light"] body {
  background:
    radial-gradient(920px 500px at 0% -10%, rgba(59, 130, 246, 0.09), transparent 46%),
    radial-gradient(760px 390px at 100% 0%, rgba(16, 185, 129, 0.05), transparent 42%),
    var(--bg);
}

:root[data-theme="light"] .card {
  box-shadow:
    0 16px 34px rgba(24, 39, 62, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.75);
}

.upload-form {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.upload-zone {
  position: relative;
  width: 100%;
  border: 1px dashed rgba(59, 130, 246, 0.65);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(59, 130, 246, 0.15), rgba(59, 130, 246, 0.05));
  padding: clamp(24px, 4vw, 38px) clamp(14px, 3vw, 24px);
  text-align: center;
  cursor: pointer;
  transition: border-color 180ms ease, transform 180ms ease, background-color 180ms ease;
}

.upload-zone input[type=file] {
  position: absolute;
  inset: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.upload-zone:hover {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.upload-form.has-file .upload-zone {
  border-color: var(--ready);
  background: linear-gradient(180deg, rgba(52, 211, 153, 0.22), rgba(52, 211, 153, 0.08));
}

.upload-form.has-error .upload-zone {
  border-color: var(--error);
  background: linear-gradient(180deg, rgba(255, 78, 78, 0.2), rgba(255, 78, 78, 0.07));
}

.upload-zone-title {
  display: block;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  font-weight: 700;
  color: var(--text);
}

.upload-zone-subtitle {
  display: block;
  margin-top: 6px;
  font-size: 0.96rem;
  color: var(--zone-subtitle);
}

.upload-zone-hint {
  display: block;
  margin-top: 10px;
  font-size: 0.85rem;
  color: var(--muted);
}

.actions {
  display: flex;
}

.file-status {
  margin: -4px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 1.35rem;
}

.upload-form.has-file .file-status {
  color: #d4ffe8;
}

.upload-form.has-error .file-status {
  color: #ffd1d1;
}

.btn {
  width: 100%;
  border: none;
  border-radius: 12px;
  background: var(--accent);
  color: #f5f5f5;
  padding: 14px 20px;
  cursor: pointer;
  font-size: clamp(1rem, 2.1vw, 1.14rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  transition: background-color 180ms ease, transform 180ms ease, box-shadow 180ms ease;
}

.btn:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.upload-form.has-file .btn {
  background: var(--ready);
  color: #06271f;
}

.upload-form.has-file .btn:hover {
  background: var(--ready-hover);
}

.btn:disabled,
.upload-form.has-error .btn {
  background: var(--btn-disabled-bg);
  color: var(--btn-disabled-text);
  cursor: not-allowed;
  transform: none;
}

.btn:focus-visible,
.upload-zone:focus-within,
.copy-btn:focus-visible,
.footer-links a:focus-visible,
.link:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--focus-glow);
}

.note {
  margin: 4px 0 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.runtime-spotlight {
  margin-top: 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-bg);
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.runtime-accordion {
  margin-top: 14px;
}

.runtime-spotlight-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.runtime-spotlight h3 {
  margin: 0;
  font-size: 1rem;
  color: #dbeafe;
  font-weight: 600;
}

.accordion-group {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}

.accordion-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel-bg);
  overflow: hidden;
}

.accordion-toggle {
  width: 100%;
  text-align: left;
  border: none;
  background: transparent;
  color: #dbeafe;
  padding: 12px 14px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  position: relative;
}

.accordion-toggle::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: #93c5fd;
  font-weight: 700;
}

.accordion-toggle[aria-expanded="true"]::after {
  content: "-";
}

.accordion-toggle:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--focus-glow);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 220ms ease;
}

:root[data-theme="light"] .accordion-toggle {
  color: #1f3f66;
}

:root[data-theme="light"] .accordion-toggle::after {
  color: #2563eb;
}

.project-panel {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-inner-bg);
  padding: 12px 14px;
}

.project-panel h3 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: #dbeafe;
  font-weight: 600;
}

:root[data-theme="light"] .project-panel h3 {
  color: #1f3f66;
}

.project-panel ul {
  margin: 0;
  padding-left: 20px;
  color: #d5dbe6;
  font-size: 0.95rem;
  line-height: 1.55;
}

:root[data-theme="light"] .project-panel ul {
  color: #2f4662;
}

.project-panel li + li {
  margin-top: 4px;
}

.service-list {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.service-list li {
  margin: 0;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--service-chip-bg);
  color: var(--service-chip-text);
  font-size: 0.86rem;
  line-height: 1.2;
}

.sample-images-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sample-images-text {
  margin: 0;
  color: #d5dbe6;
  font-size: 0.94rem;
  line-height: 1.5;
}

.sample-images-link {
  display: inline-block;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--service-chip-bg);
  color: var(--service-chip-text);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
}

.sample-images-link:hover {
  background: var(--copy-hover);
}

:root[data-theme="light"] .sample-images-text {
  color: #2f4662;
}

.runtime-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.runtime-panel .runtime-spotlight-header {
  justify-content: flex-end;
}

.runtime-text {
  margin: 0;
  color: #d5dbe6;
  font-size: 0.94rem;
  line-height: 1.5;
}

.runtime-grid {
  display: grid;
  gap: 8px;
}

.runtime-row {
  display: grid;
  grid-template-columns: minmax(130px, 180px) 1fr;
  align-items: center;
  gap: 10px;
}

.runtime-label {
  color: #b7c6da;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.runtime-row code {
  background: var(--copy-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 5px 8px;
  font-size: 0.82rem;
  color: var(--text);
  overflow-wrap: anywhere;
}

.runtime-refresh {
  width: fit-content;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--service-chip-bg);
  color: var(--service-chip-text);
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
}

.runtime-refresh:hover {
  background: var(--copy-hover);
}

.runtime-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

:root[data-theme="light"] .runtime-text {
  color: #2f4662;
}

:root[data-theme="light"] .runtime-label {
  color: #3a5675;
}

:root[data-theme="light"] .runtime-spotlight h3 {
  color: #1f3f66;
}

.note code {
  background: rgba(255, 255, 255, 0.08);
  color: #f5f5f5;
  border-radius: 6px;
  padding: 2px 6px;
}

.error-banner {
  background: rgba(255, 78, 78, 0.13);
  border: 1px solid rgba(255, 78, 78, 0.55);
  color: #f8d7da;
  padding: 12px 14px;
  border-radius: 12px;
  margin-bottom: 16px;
  font-size: 0.94rem;
}

.result-json {
  margin-top: 14px;
  background: var(--result-bg);
  color: var(--result-text);
  border: 1px solid var(--border);
  padding: 14px;
  border-radius: 12px;
  overflow: auto;
  white-space: pre-wrap;
  font-size: 0.92rem;
}

.copy-btn {
  position: absolute;
  right: 18px;
  bottom: 18px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--copy-bg);
  color: #f5f5f5;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  transition: background-color 180ms ease, transform 180ms ease;
}

.copy-btn:hover {
  background: var(--copy-hover);
  transform: translateY(-1px);
}

.link {
  color: var(--link);
  text-decoration: none;
}

.link:hover {
  color: var(--link-hover);
  text-decoration: underline;
}

.theme-toggle {
  position: absolute;
  right: 0;
  top: 4px;
  width: 34px;
  height: 62px;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
}

.theme-toggle-track {
  position: relative;
  display: block;
  width: 34px;
  height: 62px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--copy-bg);
  transition: background-color 180ms ease, border-color 180ms ease;
}

.theme-toggle:hover .theme-toggle-track {
  background: var(--copy-hover);
}

.theme-toggle-icon {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.72rem;
  opacity: 0.9;
  pointer-events: none;
}

.theme-toggle-icon-light {
  top: 6px;
}

.theme-toggle-icon-dark {
  bottom: 6px;
}

.theme-toggle-thumb {
  position: absolute;
  left: 3px;
  bottom: 3px;
  width: 26px;
  height: 26px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.22);
  transition: transform 220ms ease, background-color 180ms ease;
}

.theme-toggle[aria-checked="true"] .theme-toggle-thumb {
  transform: translateY(-30px);
}

.theme-toggle:focus-visible {
  outline: none;
}

.theme-toggle:focus-visible .theme-toggle-track {
  box-shadow: 0 0 0 3px var(--focus-glow);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: #dbeafe;
}

:root[data-theme="light"] .back-link {
  color: #1d4ed8;
}

.site-footer {
  margin-top: 2px;
  text-align: center;
  color: var(--muted);
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.82rem;
}

.footer-links {
  display: inline-flex;
  justify-content: center;
  gap: 12px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.8rem;
  padding: 4px 7px;
  border-radius: 8px;
  transition: color 180ms ease, background-color 180ms ease;
}

.footer-links a:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.05);
}

.footer-links svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

@media (max-width: 720px) {
  .container {
    padding: 32px 14px 22px;
    justify-content: flex-start;
    gap: 18px;
  }

  .theme-toggle {
    right: 0;
  }

  .copy-btn {
    position: static;
    margin-top: 12px;
  }

  .runtime-spotlight-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .runtime-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
}