:root {
  --bg: #f5f8ff;
  --surface: rgba(255, 255, 255, 0.94);
  --surface-strong: #ffffff;
  --surface-soft: #f7faff;
  --border: #d8e2f1;
  --border-strong: #c8d5e8;
  --text: #10233f;
  --muted: #5f718a;
  --primary: #2563eb;
  --primary-dark: #1747a6;
  --primary-soft: #edf4ff;
  --good-bg: #e7f8ee;
  --good-text: #12653d;
  --caution-bg: #fff4dd;
  --caution-text: #8c5a00;
  --risky-bg: #ffe6e6;
  --risky-text: #b12c2c;
  --danger-bg: #ffe8e8;
  --danger-text: #b42323;
  --shadow-soft: 0 18px 44px rgba(23, 52, 107, 0.08);
  --shadow-card: 0 14px 30px rgba(16, 35, 63, 0.08);
  --app-shell-max: 1240px;
  --rail-divider-color: rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Noto Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 0%, rgba(186, 215, 255, 0.55), transparent 28%),
    radial-gradient(circle at 100% 0%, rgba(195, 229, 255, 0.4), transparent 32%),
    linear-gradient(180deg, #eef5ff 0%, var(--bg) 100%);
}

.hero {
  text-align: center;
  padding-block: 2rem 1rem;
}

.workspace {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}

.workspace-grid {
  display: grid;
  gap: 1rem;
  align-items: start;
}

@media (min-width: 1080px) {
  .workspace-grid {
    grid-template-columns: minmax(0, 1fr) 380px;
  }
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-soft);
}

.workspace-toolbar,
.section-card,
.preview-workspace {
  padding: 1.15rem;
}

.workspace-toolbar {
  display: grid;
  gap: 1rem;
}

.toolbar-intro h2,
.section-card h2,
.preview-workspace h2,
.faq-panel h2,
.guide-card h2 {
  margin: 0;
  font-size: 1.25rem;
}

.toolbar-intro p,
.section-header p,
.preview-header p {
  margin: 0.4rem 0 0;
}

.toolbar-grid {
  display: grid;
  gap: 0.9rem;
}

@media (min-width: 860px) {
  .toolbar-grid {
    grid-template-columns: minmax(0, 240px) minmax(0, 1fr) auto;
    align-items: end;
  }
}

.toolbar-status {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  min-height: 44px;
}

.toolbar-actions {
  justify-content: flex-end;
}

.preset-strip {
  display: grid;
  gap: 0.75rem;
  padding: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-soft);
}

.preset-strip h3 {
  margin: 0;
  font-size: 1rem;
}

.preset-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.preset-chip {
  border: 1px solid #cad8ec;
  border-radius: 999px;
  padding: 0.56rem 0.9rem;
  background: #ffffff;
  color: #284062;
  font-weight: 700;
  cursor: pointer;
}

.preset-chip.is-active {
  color: #ffffff;
  background: linear-gradient(135deg, #1e40af, #2563eb);
  border-color: transparent;
}

.editor-column {
  display: grid;
  gap: 1rem;
}

.section-card {
  display: grid;
  gap: 1rem;
}

.section-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
}

.section-kicker {
  margin: 0 0 0.2rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
}

.preview-column {
  min-width: 0;
}

@media (min-width: 1080px) {
  .preview-column {
    position: sticky;
    top: 1rem;
  }
}

.preview-workspace {
  display: grid;
  gap: 1rem;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: flex-start;
}

.preview-toggle {
  display: inline-flex;
  padding: 0.2rem;
  gap: 0.2rem;
  border-radius: 999px;
  background: #edf3ff;
}

.preview-tab {
  border: none;
  border-radius: 999px;
  padding: 0.5rem 0.9rem;
  background: transparent;
  color: #33527f;
  font-weight: 700;
  cursor: pointer;
}

.preview-tab.is-active {
  color: #ffffff;
  background: var(--primary);
}

.preview-stage {
  min-height: 360px;
  padding: 1rem;
  border: 1px dashed #cdd9eb;
  border-radius: 18px;
  background:
    linear-gradient(0deg, rgba(255, 255, 255, 0.88), rgba(255, 255, 255, 0.88)),
    linear-gradient(45deg, rgba(211, 225, 245, 0.75) 25%, transparent 25%, transparent 50%, rgba(211, 225, 245, 0.75) 50%, rgba(211, 225, 245, 0.75) 75%, transparent 75%, transparent);
  background-size: 100% 100%, 16px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-image {
  max-width: 100%;
  max-height: 620px;
  width: auto;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow-card);
  background: #ffffff;
}

.placeholder {
  color: var(--muted);
  text-align: center;
  line-height: 1.5;
}

.download-grid {
  display: grid;
  gap: 0.65rem;
}

@media (min-width: 640px) {
  .download-grid {
    grid-template-columns: 1fr 1fr;
  }
}

label {
  display: grid;
  gap: 0.45rem;
  font-size: 0.95rem;
  font-weight: 650;
}

input,
select,
button,
textarea {
  font: inherit;
}

input[type="number"],
input[type="text"],
input[type="email"],
input[type="tel"],
textarea,
select,
input[type="color"],
input[type="file"] {
  width: 100%;
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 0.72rem 0.8rem;
  font-size: 0.97rem;
  background: #ffffff;
  color: var(--text);
}

input[type="color"] {
  min-height: 48px;
  padding: 0.35rem;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

textarea:focus,
input:focus,
select:focus {
  outline: 2px solid #d8e7ff;
  border-color: var(--primary);
}

button {
  border: none;
  border-radius: 12px;
  padding: 0.72rem 1rem;
  background: var(--primary);
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

button:hover:not(:disabled),
button:focus-visible:not(:disabled) {
  background: var(--primary-dark);
}

button.ghost,
.ghost-link {
  border: 1px solid #bdd0ea;
  background: #ffffff;
  color: #264268;
}

button.ghost:hover:not(:disabled),
button.ghost:focus-visible:not(:disabled) {
  background: #f5f8ff;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.form-grid {
  display: grid;
  gap: 0.8rem;
}

@media (min-width: 720px) {
  .form-grid.two {
    grid-template-columns: 1fr 1fr;
  }

  .form-grid.three {
    grid-template-columns: 1.2fr 1fr 1fr;
  }

  .compact-grid {
    align-items: end;
  }
}

.type-form {
  display: grid;
  gap: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #f9fbff;
  padding: 0.9rem;
}

.check-row {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  font-weight: 600;
}

.check-row input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.hint {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.hint.compact {
  align-self: end;
}

.hint.warn {
  color: #966103;
}

.inline-guide {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 0.95rem;
  background: var(--surface-soft);
}

.inline-guide h3 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
}

.side-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
  display: grid;
  gap: 0.35rem;
}

.raw-preview {
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-soft);
  padding: 0.8rem 0.9rem;
}

.raw-preview summary {
  cursor: pointer;
  font-weight: 700;
}

.raw-preview pre {
  margin: 0.75rem 0 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 0.86rem;
  color: #264268;
}

.message {
  border-radius: 14px;
  padding: 0.8rem 0.9rem;
  font-size: 0.94rem;
  line-height: 1.5;
}

.message.error {
  border: 1px solid #ffc7c7;
  background: var(--danger-bg);
  color: var(--danger-text);
}

.message.warning {
  border: 1px solid #f8dd9a;
  background: #fff8e6;
  color: var(--caution-text);
}

.message.success {
  border: 1px solid #c7ebd5;
  background: #eefcf3;
  color: var(--good-text);
}

.logo-meta {
  display: grid;
  gap: 0.6rem;
  align-content: start;
  padding: 0.25rem 0;
}

.metric-box {
  white-space: pre-wrap;
  font-family: "Consolas", "SFMono-Regular", monospace;
  font-size: 0.86rem;
  color: #294363;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #f9fbff;
  padding: 0.95rem;
}

.score-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  padding: 0.3rem 0.78rem;
  border-radius: 999px;
  font-size: 0.88rem;
  font-weight: 800;
}

.score-badge.good {
  background: var(--good-bg);
  color: var(--good-text);
}

.score-badge.caution {
  background: var(--caution-bg);
  color: var(--caution-text);
}

.score-badge.risky {
  background: var(--risky-bg);
  color: var(--risky-text);
}

.diagnostics-header {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
  align-items: center;
}

.diagnostics-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.diagnostics-item {
  display: grid;
  gap: 0.55rem;
  padding: 0.9rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: #ffffff;
}

.diagnostics-item.good {
  border-color: #c9ecd7;
  background: #f7fcf9;
}

.diagnostics-item.caution {
  border-color: #f2dfac;
  background: #fffaf0;
}

.diagnostics-item.risky {
  border-color: #f4c3c3;
  background: #fff5f5;
}

.diagnostics-top {
  display: flex;
  justify-content: space-between;
  gap: 0.65rem;
  align-items: center;
}

.diagnostics-title {
  font-weight: 800;
}

.fix-button {
  justify-self: start;
  padding-inline: 0.85rem;
}

.self-test-block,
.camera-test {
  display: grid;
  gap: 0.7rem;
  padding-top: 0.25rem;
}

#cameraVideo {
  width: 100%;
  border-radius: 16px;
  background: #0f172a;
  border: 1px solid var(--border);
}

.download-link {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  text-decoration: none;
  border-radius: 12px;
  padding: 0.72rem 1rem;
  background: linear-gradient(135deg, #1e40af, #2563eb);
  color: #ffffff;
  font-weight: 700;
}

.download-link:hover,
.download-link:focus-visible {
  filter: brightness(0.97);
}

.ghost-link {
  background: #ffffff;
  color: #264268;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.faq-list {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.95rem;
}

.faq-item {
  padding: 0.95rem 1rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--surface-soft);
}

.faq-item dt {
  font-weight: 800;
}

.faq-item dd {
  margin: 0.32rem 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.guide-layout {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}

@media (min-width: 860px) {
  .guide-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .guide-layout {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.guide-card {
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow-soft);
}

.guide-card p,
.guide-card li {
  color: var(--muted);
  line-height: 1.55;
}

.updated-at {
  font-size: 0.88rem;
}

.tool-footer {
  padding-bottom: 2rem;
}

.tool-footer__inner {
  display: grid;
  gap: 0.8rem;
}

.tool-footer__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.tool-footer__nav a,
.guide-card a,
.faq-panel a {
  color: #1f4fb3;
}

.tool-footer__meta,
.tool-footer__note {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.hidden {
  display: none !important;
}

[aria-invalid="true"] {
  border-color: #e33b3b !important;
  outline: 2px solid #ffd8d8;
}

@media (max-width: 719px) {
  .workspace-toolbar,
  .section-card,
  .preview-workspace {
    padding: 1rem;
  }

  .preview-stage {
    min-height: 280px;
  }

  .toolbar-actions {
    justify-content: stretch;
  }

  .toolbar-actions button {
    flex: 1 1 0;
  }
}