:root {
  color-scheme: light;
  --ink: #07140f;
  --ink-soft: #41504a;
  --muted: #6c7873;
  --green: #0f9f5a;
  --green-dark: #08703f;
  --green-light: #e9f8f0;
  --lime: #a2e34b;
  --surface: #ffffff;
  --surface-alt: #f5f8f6;
  --line: #dce5e0;
  --danger: #bd2b38;
  --danger-bg: #fff0f1;
  --warning: #8a5b00;
  --warning-bg: #fff7df;
  --shadow: 0 18px 50px rgba(7, 20, 15, 0.1);
  --radius: 18px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 8% 2%, rgba(15, 159, 90, 0.12), transparent 25rem),
    linear-gradient(180deg, #fbfdfc 0, #f3f7f5 100%);
}

button, input, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; }

:focus-visible { outline: 3px solid #16a868; outline-offset: 3px; }

.skip-link {
  position: fixed;
  z-index: 100;
  top: 12px;
  left: 12px;
  transform: translateY(-150%);
  padding: 10px 14px;
  border-radius: 8px;
  color: #fff;
  background: var(--ink);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 12px max(24px, calc((100% - 1180px) / 2));
  color: #fff;
  background: rgba(7, 20, 15, 0.97);
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 44px; height: 44px; color: var(--lime); }
.brand-mark svg { width: 40px; height: 40px; }
.brand > span:last-child { display: grid; line-height: 1; }
.brand strong { font-size: 1rem; letter-spacing: .04em; }
.brand small { margin-top: 5px; color: var(--lime); font-weight: 800; font-size: .77rem; letter-spacing: .42em; }
.header-nav { display: flex; gap: 10px; }
.nav-button, .text-button, .icon-button { border: 0; cursor: pointer; background: transparent; }
.nav-button { padding: 10px 13px; border-radius: 9px; color: #dce8e2; }
.nav-button:hover { color: #fff; background: rgba(255,255,255,.08); }

main { overflow: hidden; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(330px, .7fr);
  gap: 52px;
  align-items: center;
  max-width: 1180px;
  margin: 0 auto;
  padding: 76px 24px 68px;
}
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green-dark); font-weight: 800; font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; }
.pulse-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px rgba(15,159,90,.13); }
.hero h1 { max-width: 760px; margin: 18px 0; font-size: clamp(2.5rem, 5.2vw, 4.8rem); line-height: .99; letter-spacing: -.055em; }
.hero h1 span { color: var(--green); }
.hero-copy > p { max-width: 680px; margin: 0; color: var(--ink-soft); font-size: 1.1rem; line-height: 1.7; }
.benefits { display: flex; flex-wrap: wrap; gap: 12px 24px; margin: 28px 0 0; padding: 0; list-style: none; color: var(--ink-soft); font-size: .9rem; font-weight: 650; }
.benefits span { display: inline-grid; place-items: center; width: 20px; height: 20px; margin-right: 6px; border-radius: 50%; color: #fff; background: var(--green); font-size: .7rem; }

.format-card { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.9); box-shadow: var(--shadow); }
.format-card-heading, .preview-heading, .dialog-header { display: flex; align-items: center; justify-content: space-between; gap: 14px; }
.format-card-heading { justify-content: flex-start; }
.format-icon { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 12px; color: #fff; background: var(--green); font-size: 1.25rem; font-weight: 900; }
.format-card h2 { margin: 0; font-size: 1.05rem; }
.format-card-heading p { margin: 4px 0 0; color: var(--muted); font-size: .78rem; }
.column-guide { display: grid; gap: 0; margin: 20px 0; border-block: 1px solid var(--line); }
.column-guide > div { display: grid; grid-template-columns: 90px 1fr; align-items: center; gap: 14px; padding: 13px 4px; border-bottom: 1px solid var(--line); }
.column-guide > div:last-child { border-bottom: 0; }
.column-guide dt { color: var(--muted); font-size: .77rem; font-weight: 700; }
.column-guide dd { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; margin: 0; }
.column-guide strong { font-size: .9rem; }
.column-guide small { color: var(--green-dark); font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-weight: 700; }
.template-link { display: flex; align-items: center; justify-content: center; gap: 9px; width: 100%; padding: 12px; border-radius: 10px; color: var(--green-dark); background: var(--green-light); font-size: .86rem; font-weight: 800; text-decoration: none; }
.template-link:hover { background: #d8f2e4; }

.workspace { max-width: 1180px; margin: 0 auto 70px; padding: 36px; border: 1px solid var(--line); border-radius: 24px; background: var(--surface); box-shadow: var(--shadow); }
.section-heading, .queue-heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 22px; }
.section-heading > div, .queue-heading > div, .preview-heading > div { display: flex; align-items: center; gap: 14px; }
.step { display: grid; flex: 0 0 auto; place-items: center; width: 34px; height: 34px; border-radius: 10px; color: #fff; background: var(--ink); font-weight: 900; }
.section-heading h2, .queue-heading h2, .preview-heading h2 { margin: 0; font-size: 1.12rem; }
.section-heading p, .queue-heading p, .preview-heading p { margin: 5px 0 0; color: var(--muted); font-size: .85rem; }
.file-counter { padding: 7px 11px; border-radius: 999px; color: var(--ink-soft); background: var(--surface-alt); font-size: .78rem; font-weight: 700; }

.drop-zone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 265px;
  padding: 28px;
  border: 2px dashed #a8b9b0;
  border-radius: var(--radius);
  cursor: pointer;
  text-align: center;
  background: linear-gradient(135deg, rgba(245,248,246,.75), rgba(233,248,240,.45));
  transition: border-color .18s, background .18s, transform .18s;
}
.drop-zone:hover, .drop-zone.is-dragging { border-color: var(--green); background: var(--green-light); transform: translateY(-2px); }
.drop-zone.is-disabled { cursor: not-allowed; opacity: .66; }
.upload-icon { display: grid; place-items: center; width: 66px; height: 66px; margin-bottom: 18px; border-radius: 18px; color: var(--green); background: #fff; box-shadow: 0 9px 24px rgba(15,159,90,.15); }
.upload-icon svg { width: 34px; height: 34px; }
.drop-zone strong { font-size: 1.08rem; }
.drop-zone > span:not(.upload-icon) { margin-top: 7px; color: var(--muted); font-size: .9rem; }
.inline-action { color: var(--green-dark); font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }
.drop-zone small { margin-top: 15px; color: var(--muted); }
.field-error { margin: 10px 0 0; padding: 10px 12px; border-radius: 9px; color: var(--danger); background: var(--danger-bg); font-size: .86rem; }

.queue-panel, .preview-panel { margin-top: 34px; padding-top: 30px; border-top: 1px solid var(--line); }
.text-button { padding: 9px; border-radius: 8px; font-size: .82rem; font-weight: 750; }
.text-button:hover { background: var(--surface-alt); }
.danger { color: var(--danger); }
.file-list { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.file-item { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: center; gap: 16px; padding: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface-alt); }
.file-main { display: flex; min-width: 0; align-items: center; gap: 13px; }
.file-type { display: grid; flex: 0 0 auto; place-items: center; width: 38px; height: 42px; border-radius: 8px; color: #fff; background: var(--green-dark); font-size: .68rem; font-weight: 900; text-transform: uppercase; }
.file-copy { min-width: 0; }
.file-copy strong { display: block; overflow: hidden; font-size: .88rem; text-overflow: ellipsis; white-space: nowrap; }
.file-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 7px; margin-top: 6px; color: var(--muted); font-size: .74rem; }
.status-badge { display: inline-flex; align-items: center; gap: 5px; padding: 3px 7px; border-radius: 999px; font-weight: 800; }
.status-pending, .status-uploading { color: var(--ink-soft); background: #e7ece9; }
.status-valid { color: var(--green-dark); background: #d9f3e5; }
.status-invalid { color: var(--danger); background: #ffe0e3; }
.status-converted { color: #12547e; background: #dceffa; }
.file-actions { display: flex; align-items: center; gap: 7px; }
.icon-button { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 9px; font-size: 1.25rem; }
.icon-button:hover { background: #e7ece9; }

.preview-select { max-width: 280px; padding: 9px 35px 9px 11px; border: 1px solid var(--line); border-radius: 9px; color: var(--ink); background: #fff; }
.table-scroll { margin-top: 18px; overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; min-width: 620px; border-collapse: collapse; font-size: .84rem; }
th { padding: 11px 14px; text-align: left; color: var(--ink-soft); background: var(--surface-alt); font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; }
td { padding: 12px 14px; border-top: 1px solid var(--line); }
td:first-child { width: 55px; color: var(--muted); }
td:last-child { font-variant-numeric: tabular-nums; text-align: right; }
.empty-cell { color: var(--muted); text-align: center !important; }
.validation-details { margin-top: 12px; }
.validation-message { display: flex; align-items: flex-start; gap: 9px; margin-top: 8px; padding: 10px 12px; border-radius: 9px; font-size: .82rem; line-height: 1.45; }
.validation-message.error { color: var(--danger); background: var(--danger-bg); }
.validation-message.warning { color: var(--warning); background: var(--warning-bg); }
.validation-message.success { color: var(--green-dark); background: var(--green-light); }

.conversion-actions { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 30px; padding: 20px; border-radius: 14px; background: var(--ink); color: #fff; }
.ready-copy { display: flex; align-items: center; gap: 12px; }
.ready-copy > div { display: grid; gap: 4px; }
.ready-copy span:last-child { color: #b9c8c0; font-size: .82rem; }
.ready-icon { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; color: var(--ink); background: var(--lime); font-weight: 900; }
.conversion-actions.has-errors .ready-icon { color: #fff; background: var(--danger); }
.primary-button, .secondary-button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 45px; padding: 11px 18px; border: 0; border-radius: 10px; cursor: pointer; color: var(--ink); background: var(--lime); font-weight: 900; text-decoration: none; }
.primary-button:hover { background: #b3ee66; transform: translateY(-1px); }
.primary-button:disabled { cursor: not-allowed; opacity: .48; transform: none; }
.primary-button.is-loading { cursor: wait; }

.success-panel { display: grid; grid-template-columns: auto minmax(0,1fr) auto; align-items: start; gap: 18px; margin-top: 28px; padding: 24px; border: 1px solid #b8e4cb; border-radius: 16px; background: var(--green-light); }
.success-mark { display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; color: #fff; background: var(--green); font-size: 1.35rem; font-weight: 900; }
.success-panel h2 { margin: 3px 0 7px; font-size: 1.05rem; }
.success-panel p { margin: 0; color: var(--ink-soft); font-size: .84rem; }
.download-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; padding: 0; list-style: none; }
.download-list a { display: inline-flex; gap: 7px; padding: 7px 10px; border: 1px solid #b8e4cb; border-radius: 8px; color: var(--green-dark); background: #fff; font-size: .8rem; font-weight: 750; text-decoration: none; }

footer { display: flex; justify-content: space-between; gap: 20px; padding: 22px max(24px, calc((100% - 1180px) / 2)); color: #91a198; background: var(--ink); font-size: .75rem; }
footer span:first-child { color: #fff; font-weight: 850; letter-spacing: .04em; }

dialog { width: min(560px, calc(100% - 32px)); padding: 0; border: 1px solid var(--line); border-radius: 18px; color: var(--ink); background: #fff; box-shadow: 0 30px 80px rgba(0,0,0,.3); }
dialog::backdrop { background: rgba(3, 12, 8, .73); backdrop-filter: blur(3px); }
.dialog-header { padding: 22px 24px 18px; border-bottom: 1px solid var(--line); }
.dialog-header h2 { margin: 3px 0 0; }
.dialog-kicker { color: var(--green-dark); font-size: .72rem; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }
.help-steps { display: grid; gap: 17px; margin: 0; padding: 24px; list-style: none; }
.help-steps li { display: flex; align-items: flex-start; gap: 13px; }
.help-steps li > span { display: grid; flex: 0 0 auto; place-items: center; width: 28px; height: 28px; border-radius: 8px; color: #fff; background: var(--green); font-size: .75rem; font-weight: 900; }
.help-steps p { margin: 4px 0 0; color: var(--ink-soft); font-size: .86rem; line-height: 1.5; }
.dialog-tip { margin: 0 24px 24px; padding: 13px; border-radius: 10px; color: var(--green-dark); background: var(--green-light); font-size: .82rem; }
.about-lead { color: var(--ink-soft); font-size: 1.05rem; line-height: 1.55; }
#about-dialog > p { margin-inline: 24px; line-height: 1.55; }
.secondary-button { margin: 8px 24px 24px; color: #fff; background: var(--ink); }

.sr-only { position: absolute !important; width: 1px !important; height: 1px !important; padding: 0 !important; margin: -1px !important; overflow: hidden !important; clip: rect(0, 0, 0, 0) !important; white-space: nowrap !important; border: 0 !important; }
[hidden] { display: none !important; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-block: 52px; }
  .hero h1 { max-width: 650px; }
  .format-card { max-width: 600px; }
  .workspace { margin-inline: 16px; padding: 25px; }
  .success-panel { grid-template-columns: auto minmax(0,1fr); }
  .success-panel > .primary-button { grid-column: 1 / -1; }
}

@media (max-width: 580px) {
  .site-header { min-height: 66px; padding-inline: 16px; }
  .brand-mark { width: 35px; height: 35px; }
  .brand-mark svg { width: 33px; height: 33px; }
  .brand strong { font-size: .83rem; }
  .brand small { font-size: .63rem; }
  .nav-button { padding-inline: 8px; font-size: .82rem; }
  .hero { padding: 42px 18px 48px; }
  .hero h1 { font-size: 2.55rem; }
  .benefits { display: grid; }
  .workspace { margin: 0 10px 48px; padding: 20px 14px; border-radius: 17px; }
  .section-heading, .queue-heading, .preview-heading, .conversion-actions { align-items: flex-start; flex-direction: column; }
  .section-heading > div, .queue-heading > div, .preview-heading > div { align-items: flex-start; }
  .drop-zone { min-height: 230px; padding: 22px 15px; }
  .file-item { grid-template-columns: minmax(0,1fr) auto; padding: 11px; }
  .file-type { width: 32px; height: 36px; }
  .preview-select { width: 100%; max-width: none; }
  .conversion-actions .primary-button { width: 100%; }
  .success-panel { grid-template-columns: 1fr; }
  .success-mark { width: 38px; height: 38px; }
  footer { flex-direction: column; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}

@media (forced-colors: active) {
  .step, .format-icon, .ready-icon, .success-mark { border: 1px solid ButtonText; }
  .drop-zone { border-style: dashed; }
}