:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f5;
  --card: #ffffff;
  --border: #e5e5e5;
  --border-strong: #111111;
  --text: #111111;
  --muted: #737373;
  --primary: #111111;
  --primary-hover: #2a2a2a;
  --danger: #b91c1c;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.06);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.bg {
  position: fixed;
  inset: 0;
  background: #fafafa;
  z-index: -1;
}

.bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(#ececec 1px, transparent 1px),
    linear-gradient(90deg, #ececec 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.5;
  mask-image: radial-gradient(ellipse 90% 70% at 50% -10%, black, transparent);
}

.container {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding-bottom: 64px;
}

.container.narrow {
  width: min(440px, calc(100% - 32px));
  padding-top: 40px;
}

/* Nav */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 36px;
  height: 36px;
  background: var(--text);
  color: #fff;
  border-radius: 9px;
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 15px;
}

.brand-name {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.nav-links {
  display: flex;
  gap: 6px;
  align-items: center;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 4px;
  font-size: 13px;
  font-weight: 600;
}

.lang-switch a {
  color: var(--muted);
  text-decoration: none;
  padding: 6px 8px;
  border-radius: 6px;
}

.lang-switch a:hover,
.lang-switch a.active {
  color: var(--text);
  background: var(--bg-soft);
}

.lang-sep {
  color: var(--border);
  user-select: none;
}

.nav-links a,
.nav-tab-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
  transition: 0.15s;
}

.nav-links a:hover,
.nav-tab-link:hover {
  color: var(--text);
  background: var(--bg-soft);
}

.nav-tab-link.nav-cta,
.nav-links a.nav-cta {
  color: #fff;
  background: var(--text);
}

.nav-tab-link.nav-cta:hover,
.nav-links a.nav-cta:hover {
  background: var(--primary-hover);
}

/* Hero + workspace hints */
.hero-simple {
  text-align: center;
  margin-bottom: 28px;
}

.hero-simple h1 {
  margin: 0 0 10px;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
}

.hero-lead {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 16px;
}

.hero-steps-inline {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}

.hero-steps-inline li {
  padding: 6px 12px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
}

.workspace-hint {
  margin: 0;
  padding: 14px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  background: #fffbeb;
  border-bottom: 1px solid #fde68a;
}

.workspace-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.tab-num {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--border);
  color: var(--muted);
  font-size: 11px;
  font-weight: 800;
  display: grid;
  place-items: center;
  flex-shrink: 0;
}

.workspace-tab.active .tab-num {
  background: var(--text);
  color: #fff;
}

.help-box {
  padding: 14px 16px;
  margin-bottom: 20px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  font-size: 14px;
  line-height: 1.55;
  color: var(--muted);
}

.help-box strong { color: var(--text); }

.help-box-accent {
  background: #f0fdf4;
  border-color: #bbf7d0;
}

.steps-guide {
  margin: 0 0 20px;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.steps-guide li { margin-bottom: 6px; }
.steps-guide em { color: var(--muted); font-style: normal; font-weight: 600; }

.help-details {
  margin: 12px 0 16px;
  padding: 12px 14px;
  border: 1px dashed var(--border);
  border-radius: 10px;
  background: #fff;
}

.help-details summary {
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

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

.result-arrow {
  font-size: 16px;
  font-weight: 800;
  margin-bottom: 12px;
  color: var(--text);
}

.result-tip {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.faq-title {
  margin: 24px 0 12px;
  font-size: 16px;
  font-weight: 800;
}

.faq-list { display: grid; gap: 8px; }

.faq-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 16px;
  background: #fff;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 14px;
}

.faq-item p {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.55;
}

.demo-label {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--muted);
}

.empty-state {
  text-align: center;
  padding: 40px 20px;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.empty-state p { margin: 0 0 8px; color: var(--muted); font-size: 14px; }
.empty-state strong { color: var(--text); display: block; margin-bottom: 4px; font-size: 16px; }
.empty-state .btn { margin-top: 12px; }

/* Hero compact - removed, keep hero-simple */
.hero-compact {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 28px;
}

.hero-compact h1 {
  margin: 0 0 8px;
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.hero-compact p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  max-width: 420px;
}

.eyebrow {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.55;
}

.hero-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.hero-pills span {
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  background: #fff;
}

/* Workspace tabs */
.workspace {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--card);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.workspace-tabs {
  display: flex;
  gap: 0;
  padding: 8px 8px 0;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  overflow-x: auto;
  scrollbar-width: none;
}

.workspace-tabs::-webkit-scrollbar { display: none; }

.workspace-tab {
  flex-shrink: 0;
  padding: 12px 18px;
  border: none;
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  border-radius: 10px 10px 0 0;
  transition: 0.15s;
  position: relative;
}

.workspace-tab:hover {
  color: var(--text);
}

.workspace-tab.active {
  color: var(--text);
  background: var(--card);
}

.workspace-tab.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--card);
}

.workspace-body {
  padding: 28px;
}

.tab-panel {
  display: none;
  animation: fadeIn 0.2s ease;
}

.tab-panel.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: none; }
}

.panel-head {
  margin-bottom: 24px;
}

.panel-head h2 {
  margin: 0 0 6px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.panel-head p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
}

.panel-head-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

/* Result strip */
.result-strip {
  margin-bottom: 24px;
  padding: 20px;
  border: 2px solid #16a34a;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #f0fdf4 0%, #fff 100%);
}

.result-strip-head {
  margin-bottom: 12px;
}

.result-label {
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.result-strip-head p {
  margin: 4px 0 0;
  font-weight: 700;
  font-size: 15px;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
  margin-top: 10px;
}

/* Info tab */
.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.info-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.info-num {
  display: block;
  font-size: 11px;
  font-weight: 800;
  color: var(--muted);
  margin-bottom: 10px;
}

.info-card h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
}

.info-card p {
  margin: 0;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.5;
}

.info-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.info-feature {
  padding: 14px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.info-feature strong {
  display: block;
  font-size: 14px;
  margin-bottom: 2px;
}

.info-feature span {
  font-size: 11px;
  color: var(--muted);
}

.info-docs {
  margin: 0;
  text-align: center;
  font-weight: 600;
  font-size: 14px;
}

.info-docs a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border-strong);
}

.info-demo {
  text-align: center;
  margin-bottom: 16px;
}

.form-stack {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.checks-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  margin: 12px 0 16px;
}

/* Dropzone */
.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 148px;
  border: 2px dashed #d4d4d4;
  border-radius: var(--radius);
  padding: 24px;
  cursor: pointer;
  transition: 0.2s;
  background: #fff;
  margin-bottom: 16px;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--text);
  background: var(--bg-soft);
}

.dropzone input { display: none; }

.dropzone-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
  font-size: 18px;
  font-weight: 700;
}

.dropzone-text {
  font-size: 14px;
  color: var(--muted);
  text-align: center;
}

.dropzone-text strong {
  color: var(--text);
  display: block;
  margin-bottom: 2px;
}

.file-name {
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}

.two-uploads {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}

.dropzone.small {
  min-height: 110px;
  padding: 18px;
}

.dropzone.small .dropzone-icon { display: none; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: none;
  border-radius: 10px;
  padding: 12px 20px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  transition: 0.15s;
  font-family: inherit;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
}

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

.btn.ghost {
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border-strong);
}

.btn.ghost:hover { background: var(--bg-soft); }

.btn.full { width: 100%; }

.status {
  min-height: 20px;
  margin-top: 12px;
  font-size: 14px;
}

.status.ok { color: #15803d; font-weight: 600; }
.status.err { color: var(--danger); font-weight: 600; }

.link-box {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
}

.link-box input {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  font-family: ui-monospace, monospace;
  font-size: 12px;
}

/* Files */
.files-list { display: grid; gap: 8px; }

.file-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-soft);
}

.file-row strong {
  display: block;
  margin-bottom: 2px;
  word-break: break-all;
  font-size: 14px;
}

.file-row small { color: var(--muted); font-size: 12px; }

.file-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  margin-top: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  font-size: 10px;
  font-weight: 600;
  color: var(--muted);
  background: #fff;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 32px;
  font-size: 14px;
}

/* Form fields */
.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  margin-bottom: 16px;
}

.field-inline {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
  min-width: 140px;
}

.field-inline.full { flex: 1 1 100%; }

.field-inline span,
.field-check span {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
}

.field-inline select,
.field-inline input[type="text"] {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  font-size: 14px;
  font-family: inherit;
}

.field-check {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.field-check input { width: auto; accent-color: var(--text); }

code {
  background: #fff;
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--border);
  font-size: 12px;
}

.hidden { display: none !important; }

/* Share / download page */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}

.card-label {
  display: inline-block;
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 8px;
}

.download-card h1 {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.file-info {
  display: flex;
  gap: 14px;
  align-items: center;
  margin: 20px 0;
}

.file-icon {
  width: 48px;
  height: 48px;
  background: var(--text);
  color: #fff;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 11px;
  font-weight: 800;
}

.file-title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 4px;
  word-break: break-all;
}

.notice-box {
  margin: 16px 0;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-soft);
  color: var(--muted);
  font-size: 13px;
}

.hint, .meta { color: var(--muted); font-size: 14px; }

.site-footer {
  text-align: center;
  padding-top: 32px;
  color: var(--muted);
  font-size: 13px;
}

.site-footer a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
}

/* Docs */
.docs-page { max-width: 760px; }

.docs-header { margin: 32px 0 24px; }

.docs-header h1 {
  font-size: clamp(26px, 4vw, 36px);
  letter-spacing: -0.03em;
  margin: 8px 0 12px;
}

.docs-toc {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.docs-toc a {
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  text-decoration: none;
}

.docs-toc a:hover {
  color: var(--text);
  border-color: var(--border-strong);
}

.docs-content section { margin-bottom: 40px; }

.docs-content h2 {
  font-size: 22px;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}

.docs-content h3 { font-size: 15px; margin: 20px 0 8px; }

.docs-content p,
.docs-content li {
  color: var(--muted);
  line-height: 1.65;
  font-size: 15px;
}

.docs-table-wrap { overflow-x: auto; margin: 16px 0; }

.docs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.docs-table th,
.docs-table td {
  border: 1px solid var(--border);
  padding: 10px 12px;
  text-align: left;
}

.docs-table th {
  background: var(--bg-soft);
}

@media (max-width: 768px) {
  .hero-compact { flex-direction: column; align-items: flex-start; }
  .info-grid { grid-template-columns: 1fr; }
  .info-features { grid-template-columns: repeat(2, 1fr); }
  .two-uploads { grid-template-columns: 1fr; }
  .file-row { grid-template-columns: 1fr; }
  .workspace-body { padding: 20px 16px; }
  .workspace-tab { padding: 10px 14px; font-size: 12px; }
  .nav-links .nav-hide-mobile { display: none; }
  .link-box { grid-template-columns: 1fr; }
}