:root {
  color-scheme: light;
  --bg: #f5f5f7;
  --surface: rgba(255, 255, 255, 0.82);
  --surface-solid: #fff;
  --surface-muted: #f1f2f4;
  --text: #1d1d1f;
  --muted: #6e6e73;
  --quiet: #86868b;
  --line: rgba(0, 0, 0, 0.1);
  --line-soft: rgba(0, 0, 0, 0.065);
  --accent: #0071e3;
  --accent-soft: rgba(0, 113, 227, 0.1);
  --ok: #148a3d;
  --danger: #b42318;
  --radius: 24px;
  --radius-sm: 14px;
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Segoe UI", sans-serif;
  --mono: "SF Mono", SFMono-Regular, ui-monospace, Menlo, Monaco, Consolas, monospace;
  --shadow: 0 22px 55px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--sans);
  background:
    linear-gradient(180deg, #fbfbfd 0%, var(--bg) 360px),
    var(--bg);
  overflow-x: hidden;
}

a {
  color: inherit;
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

code {
  font-family: var(--mono);
  color: var(--text);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  height: 64px;
  display: grid;
  grid-template-columns: minmax(150px, 1fr) auto minmax(90px, 1fr);
  align-items: center;
  gap: 24px;
  padding: 0 clamp(18px, 4vw, 56px);
  border-bottom: 1px solid var(--line-soft);
  background: rgba(251, 251, 253, 0.78);
  backdrop-filter: blur(24px) saturate(160%);
  -webkit-backdrop-filter: blur(24px) saturate(160%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0;
}

.mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
}

.nav {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  padding: 4px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.68);
}

.nav-item {
  min-width: 78px;
  padding: 8px 12px;
  border-radius: 999px;
  color: var(--muted);
  text-align: center;
  text-decoration: none;
  font-size: 13px;
  font-weight: 560;
  transition: background 160ms ease, color 160ms ease;
}

.nav-item:hover {
  color: var(--text);
}

.nav-item.active {
  color: var(--text);
  background: var(--surface-solid);
  box-shadow: 0 1px 5px rgba(0, 0, 0, 0.08);
}

.top-link {
  justify-self: end;
  color: var(--accent);
  text-decoration: none;
  font-size: 14px;
  font-weight: 560;
}

main {
  width: min(1180px, 100%);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 70px) clamp(18px, 4vw, 56px) 84px;
}

.hero-shell {
  display: grid;
  grid-template-columns: minmax(280px, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
  min-height: calc(100vh - 128px);
}

.intro {
  position: sticky;
  top: 104px;
  padding-top: 16px;
}

.eyebrow,
.label {
  margin: 0 0 10px;
  color: var(--quiet);
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0;
  text-transform: none;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 470px;
  margin-bottom: 18px;
  font-size: clamp(46px, 7vw, 76px);
  line-height: 0.96;
  letter-spacing: 0;
  font-weight: 720;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
  letter-spacing: 0;
  font-weight: 700;
}

h3 {
  margin-bottom: 8px;
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: 0;
  font-weight: 650;
}

.lead,
.section-copy p,
.notice,
.mult-result,
.custom-line,
small {
  color: var(--muted);
  line-height: 1.55;
}

.lead {
  max-width: 450px;
  font-size: 19px;
}

.patcher {
  display: grid;
  gap: 14px;
}

.dropzone {
  min-height: 310px;
  display: grid;
  place-items: center;
  padding: clamp(26px, 5vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.dropzone.dragover {
  border-color: rgba(0, 113, 227, 0.45);
  box-shadow: 0 24px 62px rgba(0, 113, 227, 0.13);
  transform: translateY(-1px);
}

.dz-content {
  max-width: 420px;
  text-align: center;
}

.dz-icon {
  margin-bottom: 18px;
  color: var(--accent);
}

.dz-content h2 {
  margin-bottom: 10px;
  font-size: clamp(27px, 4vw, 40px);
}

.dz-content p {
  margin-bottom: 0;
  color: var(--muted);
}

.link-btn {
  border: 0;
  padding: 0;
  color: var(--accent);
  background: none;
  font-weight: 600;
}

.notice {
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.control-panel {
  padding: 20px;
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: var(--surface-solid);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: start;
  margin-bottom: 16px;
}

.panel-head h3,
.label {
  margin-bottom: 0;
}

.hint {
  flex: 0 0 auto;
  color: var(--quiet);
  font-size: 13px;
  line-height: 1.4;
}

.multiplier-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
}

.mult-card {
  min-height: 118px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 14px;
  padding: 15px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  color: var(--text);
  background: var(--surface-muted);
  text-align: left;
  transition: background 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.mult-card:hover {
  background: #fff;
}

.mult-card.active {
  border-color: rgba(0, 113, 227, 0.45);
  background: #fff;
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.mult-num {
  font-size: 24px;
  line-height: 1;
  font-weight: 700;
  letter-spacing: 0;
}

.mult-num.auto {
  color: var(--accent);
}

.mult-result,
.custom-line {
  font-size: 12px;
}

.custom-line input {
  width: 58px;
  margin-right: 6px;
  padding: 7px 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  background: #fff;
}

.queue-actions,
.link-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.primary,
.ghost-btn {
  min-height: 36px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
}

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

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

.ghost-btn {
  color: var(--text);
  background: var(--surface-muted);
}

.queue {
  display: grid;
  gap: 10px;
}

.queue-empty {
  padding: 28px;
  border: 1px dashed var(--line);
  border-radius: 16px;
  color: var(--quiet);
  text-align: center;
  background: #fafafa;
}

.queue-row {
  display: grid;
  grid-template-columns: minmax(190px, 1.45fr) repeat(5, minmax(88px, 0.58fr)) minmax(104px, 0.62fr);
  gap: 10px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line-soft);
  border-radius: 16px;
  background: #fafafa;
}

.file-name {
  overflow-wrap: anywhere;
  font-weight: 650;
}

.file-sub,
.metric-label {
  color: var(--quiet);
  font-size: 11px;
  line-height: 1.35;
}

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

.status-pill {
  justify-self: start;
  padding: 6px 9px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--muted);
  background: #fff;
  font-size: 12px;
}

.status-pill.done {
  color: var(--ok);
  border-color: rgba(20, 138, 61, 0.22);
  background: rgba(20, 138, 61, 0.07);
}

.status-pill.error {
  color: var(--danger);
  border-color: rgba(180, 35, 24, 0.2);
  background: rgba(180, 35, 24, 0.07);
}

.download-btn {
  display: inline-flex;
  justify-content: center;
  min-width: 92px;
  padding: 8px 12px;
  border-radius: 999px;
  color: #fff;
  background: var(--accent);
  text-decoration: none;
  font-size: 13px;
  font-weight: 650;
}

.section {
  display: grid;
  grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  gap: clamp(24px, 5vw, 64px);
  align-items: start;
  padding: clamp(54px, 8vw, 92px) 0 0;
}

.section.compact {
  align-items: center;
}

.section-copy {
  max-width: 470px;
}

.section-copy h2 {
  margin-bottom: 14px;
}

.details-grid,
.settings-grid {
  display: grid;
  gap: 12px;
}

.details-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.details-grid article,
.setting-row {
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background: var(--surface-solid);
}

.details-grid article {
  min-height: 210px;
  padding: 22px;
}

.details-grid span {
  display: inline-flex;
  margin-bottom: 42px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 650;
}

.details-grid p {
  margin-bottom: 0;
  color: var(--muted);
  line-height: 1.55;
}

.setting-row {
  display: flex;
  justify-content: space-between;
  gap: 22px;
  align-items: center;
  padding: 18px 20px;
}

.setting-row span {
  display: grid;
  gap: 4px;
}

.setting-row input[type="text"] {
  width: min(250px, 44vw);
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--text);
  background: #fff;
}

.setting-row input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--accent);
}

.link-grid a {
  min-width: 132px;
  padding: 12px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  color: var(--accent);
  background: #fff;
  text-align: center;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
}

@media (max-width: 1040px) {
  .hero-shell,
  .section {
    grid-template-columns: 1fr;
  }

  .intro {
    position: static;
    padding-top: 0;
  }

  .lead {
    max-width: 720px;
  }

  .details-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .queue-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .topbar {
    grid-template-columns: 1fr auto;
    height: auto;
    min-height: 62px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .nav {
    grid-column: 1 / -1;
    width: 100%;
    overflow-x: auto;
    justify-content: space-between;
  }

  .nav-item {
    min-width: max-content;
    flex: 1;
  }

  .top-link {
    align-self: center;
  }

  main {
    padding-top: 28px;
  }

  .hero-shell {
    min-height: auto;
  }

  h1 {
    font-size: clamp(42px, 12vw, 58px);
  }

  .dropzone {
    min-height: 260px;
  }

  .multiplier-row,
  .details-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .panel-head,
  .setting-row {
    flex-direction: column;
    align-items: stretch;
  }

  .hint {
    flex: auto;
  }

  .queue-actions {
    width: 100%;
  }

  .queue-actions button {
    flex: 1;
  }
}

@media (max-width: 520px) {
  .brand span:last-child {
    display: none;
  }

  .topbar {
    gap: 12px;
  }

  .control-panel,
  .dropzone {
    border-radius: 18px;
  }

  .multiplier-row,
  .details-grid,
  .queue-row {
    grid-template-columns: 1fr;
  }

  .mult-card {
    min-height: 100px;
  }

  .setting-row input[type="text"] {
    width: 100%;
  }
}