/* CSV Cleanroom — MIT License © 2026 Jachym Solta */

:root {
  color-scheme: light dark;
  --bg: #f4f1e9;
  --surface: #fffdf8;
  --surface-alt: #f4f1e7;
  --ink: #17211c;
  --muted: #5b6861;
  --line: #ddd8cc;
  --line-strong: #c4bdae;
  --accent: #0c6a58;
  --accent-hover: #095244;
  --accent-soft: #e0f0e9;
  --accent-ink: #ffffff;
  --focus: #0c6a58;
  --warn: #8a5300;
  --warn-soft: #fbefd8;
  --danger: #983026;
  --danger-soft: #f9e6e2;
  --cta-bg: #12251e;
  --cta-ink: #f2f6f1;
  --cta-muted: #b5c7bc;
  --cta-accent: #9ce9cf;
  --cta-accent-ink: #0c241c;
  --shadow: 0 1px 2px rgba(23, 33, 28, 0.04), 0 10px 30px rgba(23, 33, 28, 0.04);
  --radius: 16px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0e1311;
    --surface: #161d19;
    --surface-alt: #1c2520;
    --ink: #e7eee8;
    --muted: #9aa89e;
    --line: #2a352f;
    --line-strong: #3b4941;
    --accent: #74d9bb;
    --accent-hover: #93e8ce;
    --accent-soft: #14322a;
    --accent-ink: #06231a;
    --focus: #9ce9cf;
    --warn: #e7b566;
    --warn-soft: #33270f;
    --danger: #f0a094;
    --danger-soft: #381d18;
    --cta-bg: #1a3128;
    --cta-ink: #f0f6f1;
    --cta-muted: #b8cbbf;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.35), 0 16px 40px rgba(0, 0, 0, 0.22);
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--bg);
  background-image: radial-gradient(1100px 520px at 12% -8%, var(--accent-soft), transparent 62%);
  background-repeat: no-repeat;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

h1,
h2,
p {
  text-wrap: pretty;
}

a {
  color: var(--accent);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

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

.skip-link {
  position: absolute;
  left: 16px;
  top: -70px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 0 0 8px 8px;
  background: var(--ink);
  color: var(--bg);
  font-size: 13px;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 0;
}

.page {
  width: min(100% - 48px, 1180px);
  margin: 0 auto;
  padding-bottom: 30px;
}

/* Header ---------------------------------------------------------- */

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-top: 26px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 30px;
  height: 30px;
  place-items: center;
  border-radius: 8px;
  background: var(--accent);
  color: var(--accent-ink);
}

.brand-mark svg {
  width: 18px;
  height: 18px;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

/* Hero ------------------------------------------------------------ */

.hero {
  max-width: 900px;
  padding: 64px 0 40px;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
  opacity: 0.55;
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(2.7rem, 6.4vw, 4.7rem);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 0.98;
}

.hero h1 em {
  color: var(--accent);
  font-style: italic;
}

.lede {
  max-width: 62ch;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.65;
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.badges li {
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.badges li::before {
  content: "✓";
  margin-right: 6px;
  color: var(--accent);
}

/* Workspace ------------------------------------------------------- */

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: 18px;
  align-items: start;
}

.panel {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.panel-head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.step {
  flex: none;
  display: inline-grid;
  min-width: 27px;
  height: 22px;
  margin-top: 1px;
  padding: 0 6px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--surface-alt);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
}

.panel-head h2 {
  margin: 0;
  font-size: 1.08rem;
  font-weight: 650;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

.panel-head p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.45;
}

/* Input ----------------------------------------------------------- */

.dropzone {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 17px;
  border: 1.5px dashed var(--line-strong);
  border-radius: 11px;
  background: var(--surface-alt);
  cursor: pointer;
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.dropzone:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone.is-dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.dropzone:focus-within {
  outline: 3px solid var(--focus);
  outline-offset: 3px;
}

.dropzone input:focus-visible {
  outline: none;
}

.dropzone-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dropzone-icon {
  display: grid;
  width: 30px;
  height: 30px;
  flex: none;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface);
  color: var(--accent);
}

.dropzone-icon svg {
  width: 17px;
  height: 17px;
}

.dropzone-title {
  font-size: 13.5px;
  font-weight: 650;
}

.dropzone-hint {
  padding-left: 40px;
  color: var(--muted);
  font-size: 11.5px;
}

.file-name {
  margin: 9px 0 0;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 11px;
  overflow-wrap: anywhere;
}

.or {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 16px 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.or::before,
.or::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--line);
}

.field {
  min-width: 0;
}

.field > label {
  display: block;
  margin-bottom: 6px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.01em;
}

textarea,
select {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  transition: border-color 0.15s ease;
}

textarea {
  min-height: 148px;
  padding: 11px 12px;
  resize: vertical;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.6;
}

textarea::placeholder {
  color: var(--muted);
  opacity: 0.65;
}

select {
  height: 40px;
  padding: 0 10px;
  font-size: 13px;
}

textarea:hover,
select:hover {
  border-color: var(--muted);
}

textarea:focus-visible,
select:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

.options {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 14px;
}

.checkline {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-top: 14px;
}

.checkline input {
  width: 15px;
  height: 15px;
  flex: none;
  margin: 3px 0 0;
  accent-color: var(--accent);
}

.checkline label {
  font-size: 12px;
  line-height: 1.5;
}

.checkline label span {
  color: var(--muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
}

.btn {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: 9px;
  cursor: pointer;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  line-height: 1;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-primary:disabled {
  border-color: var(--line);
  background: var(--surface-alt);
  color: var(--muted);
  opacity: 1;
}

.btn-ghost {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--ink);
}

.btn-ghost:hover:not(:disabled) {
  border-color: var(--muted);
  background: var(--surface-alt);
}

.btn-quiet {
  padding-inline: 10px;
  background: transparent;
  color: var(--muted);
  text-decoration: underline;
  text-decoration-color: var(--line-strong);
  text-underline-offset: 3px;
}

.btn-quiet:hover:not(:disabled) {
  color: var(--ink);
}

.btn kbd {
  padding: 3px 5px;
  border: 1px solid currentColor;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 9px;
  font-weight: 500;
  line-height: 1;
  opacity: 0.6;
}

.shortcut-note {
  margin: 9px 0 0;
  color: var(--muted);
  font-size: 11.5px;
}

.notice {
  margin: 16px 0 0;
  padding: 10px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-size: 12.5px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.notice[data-tone="ok"] {
  background: var(--accent-soft);
  color: var(--accent);
}

.notice[data-tone="warn"] {
  background: var(--warn-soft);
  color: var(--warn);
}

.notice[data-tone="error"] {
  background: var(--danger-soft);
  color: var(--danger);
}

/* Output ---------------------------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--surface);
}

.stat {
  min-width: 0;
  padding: 12px 14px;
  border-left: 1px solid var(--line);
}

.stat:first-child {
  border-left: 0;
}

.stat dt {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.08em;
  line-height: 1.3;
  text-transform: uppercase;
}

.stat dd {
  margin: 5px 0 0;
  font-family: var(--mono);
  font-size: 24px;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.03em;
  line-height: 1;
}

.details {
  min-height: 18px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.5;
}

.table-shell {
  margin-top: 14px;
}

.table-empty {
  display: flex;
  min-height: 238px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px 20px;
  border: 1px dashed var(--line-strong);
  border-radius: 11px;
  background: var(--surface-alt);
  color: var(--muted);
  text-align: center;
}

.table-empty p {
  margin: 7px 0 0;
  font-size: 13.5px;
}

.table-empty .empty-sub {
  margin-top: 3px;
  font-size: 11.5px;
  opacity: 0.8;
}

.empty-glyph {
  width: 38px;
  height: 38px;
  color: var(--line-strong);
}

.table-scroll {
  max-height: 430px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 11px;
  scrollbar-color: var(--line-strong) transparent;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
}

th,
td {
  max-width: 280px;
  padding: 8px 11px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  text-align: left;
  text-overflow: ellipsis;
  white-space: nowrap;
}

thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  border-bottom: 1px solid var(--line-strong);
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 11px;
  font-weight: 600;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover {
  background: var(--surface-alt);
}

.preview-note {
  min-height: 17px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 11px;
}

.output-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

/* CTA ------------------------------------------------------------- */

.cta {
  position: relative;
  display: flex;
  overflow: hidden;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 26px;
  padding: clamp(26px, 4vw, 40px);
  border-radius: var(--radius);
  background: var(--cta-bg);
  color: var(--cta-ink);
}

.cta::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -150px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.035);
  pointer-events: none;
}

.cta-copy {
  position: relative;
  z-index: 1;
  flex: 1 1 460px;
}

.cta .eyebrow {
  margin-bottom: 10px;
  color: var(--cta-accent);
}

.cta h2 {
  max-width: 24ch;
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.55rem, 3.1vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.12;
}

.cta p:not(.eyebrow) {
  max-width: 58ch;
  margin: 12px 0 0;
  color: var(--cta-muted);
  font-size: 13.5px;
  line-height: 1.6;
}

.btn-cta {
  position: relative;
  z-index: 1;
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  border-radius: 10px;
  background: var(--cta-accent);
  color: var(--cta-accent-ink);
  font-size: 13.5px;
  font-weight: 650;
  text-decoration: none;
  transition: filter 0.15s ease, transform 0.15s ease;
}

.btn-cta:hover {
  filter: brightness(1.06);
}

.btn-cta:active {
  transform: translateY(1px);
}

/* Footer ---------------------------------------------------------- */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11.5px;
}

.site-footer p {
  margin: 0;
}

.site-footer strong {
  color: var(--ink);
  font-weight: 600;
}

.footer-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.02em;
}

.noscript {
  margin: 18px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--warn-soft);
  color: var(--warn);
  font-size: 13px;
}

.clipboard-fallback {
  position: fixed;
  top: -1000px;
  left: -1000px;
  opacity: 0;
}

/* Responsive ------------------------------------------------------ */

@media (max-width: 980px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 48px;
  }
}

@media (max-width: 620px) {
  .page {
    width: calc(100% - 32px);
  }

  .site-header {
    padding-top: 18px;
  }

  .header-meta {
    display: none;
  }

  .hero {
    padding: 38px 0 28px;
  }

  .hero h1 {
    font-size: clamp(2.4rem, 11vw, 3.4rem);
  }

  .lede {
    margin-top: 18px;
    font-size: 15.5px;
  }

  .badges {
    margin-top: 19px;
  }

  .panel {
    padding: 17px;
    border-radius: 13px;
  }

  .options {
    grid-template-columns: 1fr;
  }

  .actions .btn-primary {
    flex-basis: 100%;
  }

  .actions .btn-ghost,
  .actions .btn-quiet {
    flex: 1;
  }

  .stat {
    padding: 10px 11px;
  }

  .stat dd {
    font-size: 21px;
  }

  .table-empty {
    min-height: 210px;
  }

  .cta {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 20px;
    padding: 24px;
  }

  .cta-copy {
    flex-basis: auto;
    width: 100%;
  }

  .btn-cta {
    width: 100%;
    justify-content: center;
    text-align: center;
    white-space: normal;
  }

  .site-footer {
    flex-direction: column;
    gap: 6px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}