:root {
  --ink: #102d3d;
  --ink-soft: #46606d;
  --blue: #278fd0;
  --blue-dark: #176fa7;
  --blue-pale: #eaf6fc;
  --paper: #fffdfa;
  --canvas: #f2f0ea;
  --canvas-top: #f8f7f2;
  --canvas-glow: rgba(39, 143, 208, 0.12);
  --line: #d9dedc;
  --line-dark: #bdc9ca;
  --border-subtle: rgba(16, 45, 61, 0.12);
  --badge-bg: rgba(255, 255, 255, 0.62);
  --fact-bg: rgba(255, 255, 255, 0.5);
  --surface: rgba(255, 253, 250, 0.94);
  --surface-solid: #fff;
  --surface-muted: rgba(245, 247, 245, 0.66);
  --surface-hover: #f7f8f6;
  --preview-bg: #e8e8e5;
  --focus-ring: rgba(39, 143, 208, 0.32);
  --input-hover-border: #90a4a8;
  --action-bg: #102d3d;
  --action-hover: #17445c;
  --action-ink: #fff;
  --action-shadow: 0 8px 18px rgba(16, 45, 61, 0.2);
  --brand-backdrop: transparent;
  --theme-track: rgba(255, 255, 255, 0.56);
  --theme-active: #fff;
  --theme-active-shadow: 0 1px 5px rgba(16, 45, 61, 0.15);
  --warning: #92610d;
  --success: #23845f;
  --success-ink: #fff;
  --danger: #a33c37;
  --shadow: 0 22px 60px rgba(16, 45, 61, 0.1);
  color-scheme: light;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

:root[data-theme="dark"] {
  --ink: #e7eff3;
  --ink-soft: #a8bac3;
  --blue: #55b7ee;
  --blue-dark: #8bcff5;
  --blue-pale: #143246;
  --paper: #15252d;
  --canvas: #0c151a;
  --canvas-top: #111f26;
  --canvas-glow: rgba(53, 166, 226, 0.16);
  --line: #2b414c;
  --line-dark: #405d69;
  --border-subtle: rgba(198, 224, 235, 0.13);
  --badge-bg: rgba(24, 39, 47, 0.8);
  --fact-bg: rgba(25, 42, 51, 0.66);
  --surface: rgba(20, 34, 41, 0.95);
  --surface-solid: #14242c;
  --surface-muted: rgba(15, 29, 36, 0.82);
  --surface-hover: #1b303a;
  --preview-bg: #25363e;
  --focus-ring: rgba(85, 183, 238, 0.42);
  --input-hover-border: #6f909e;
  --action-bg: #3ba7df;
  --action-hover: #62bcef;
  --action-ink: #07151c;
  --action-shadow: 0 8px 22px rgba(0, 0, 0, 0.32);
  --brand-backdrop: rgba(255, 255, 255, 0.92);
  --theme-track: rgba(7, 18, 23, 0.58);
  --theme-active: #263d48;
  --theme-active-shadow: 0 1px 7px rgba(0, 0, 0, 0.34);
  --warning: #efbd64;
  --success: #62cda3;
  --success-ink: #082018;
  --danger: #f1948e;
  --shadow: 0 22px 60px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="system"] {
    --ink: #e7eff3;
    --ink-soft: #a8bac3;
    --blue: #55b7ee;
    --blue-dark: #8bcff5;
    --blue-pale: #143246;
    --paper: #15252d;
    --canvas: #0c151a;
    --canvas-top: #111f26;
    --canvas-glow: rgba(53, 166, 226, 0.16);
    --line: #2b414c;
    --line-dark: #405d69;
    --border-subtle: rgba(198, 224, 235, 0.13);
    --badge-bg: rgba(24, 39, 47, 0.8);
    --fact-bg: rgba(25, 42, 51, 0.66);
    --surface: rgba(20, 34, 41, 0.95);
    --surface-solid: #14242c;
    --surface-muted: rgba(15, 29, 36, 0.82);
    --surface-hover: #1b303a;
    --preview-bg: #25363e;
    --focus-ring: rgba(85, 183, 238, 0.42);
    --input-hover-border: #6f909e;
    --action-bg: #3ba7df;
    --action-hover: #62bcef;
    --action-ink: #07151c;
    --action-shadow: 0 8px 22px rgba(0, 0, 0, 0.32);
    --brand-backdrop: rgba(255, 255, 255, 0.92);
    --theme-track: rgba(7, 18, 23, 0.58);
    --theme-active: #263d48;
    --theme-active-shadow: 0 1px 7px rgba(0, 0, 0, 0.34);
    --warning: #efbd64;
    --success: #62cda3;
    --success-ink: #082018;
    --danger: #f1948e;
    --shadow: 0 22px 60px rgba(0, 0, 0, 0.3);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--canvas);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 84% 9%, var(--canvas-glow), transparent 25rem),
    linear-gradient(180deg, var(--canvas-top) 0, var(--canvas) 42rem);
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
summary:focus-visible,
.drop-zone:focus-within {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  min-height: 104px;
  margin: 0 auto;
  border-bottom: 1px solid var(--border-subtle);
}

.brand {
  display: inline-flex;
  align-items: center;
  padding: 6px 9px;
  margin-left: -9px;
  border-radius: 10px;
  background: var(--brand-backdrop);
}

.brand img {
  display: block;
  width: 218px;
  height: auto;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

.theme-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--theme-track);
}

.theme-option {
  min-height: 31px;
  padding: 5px 10px;
  cursor: pointer;
  color: var(--ink-soft);
  border: 0;
  border-radius: 999px;
  background: transparent;
  font-size: 0.7rem;
  font-weight: 780;
  line-height: 1;
  transition: color 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.theme-option:hover {
  color: var(--ink);
  background: var(--surface-hover);
}

.theme-option[aria-pressed="true"],
.theme-option.is-active {
  color: var(--ink);
  background: var(--theme-active);
  box-shadow: var(--theme-active-shadow);
}

.local-badge,
.defaults-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--badge-bg);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.local-badge > span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(35, 132, 95, 0.12);
}

main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.intro {
  max-width: 790px;
  padding: 74px 0 52px;
}

.eyebrow,
.step-label {
  margin: 0 0 12px;
  color: var(--blue-dark);
  font-size: 0.73rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2.7rem, 6vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -0.045em;
  line-height: 0.98;
}

.lede {
  max-width: 660px;
  margin: 26px 0 0;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.7;
}

.format-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}

.format-facts span {
  padding: 7px 11px;
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  color: var(--ink-soft);
  background: var(--fact-bg);
  font-size: 0.78rem;
  font-weight: 750;
  letter-spacing: 0.025em;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(310px, 0.75fr);
  gap: 24px;
  align-items: start;
  padding-bottom: 80px;
}

.side-column {
  display: grid;
  gap: 24px;
}

.card {
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.form-card {
  padding: clamp(24px, 5vw, 44px);
}

.card-heading,
.result-heading,
.advanced-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
}

.card-heading {
  margin-bottom: 30px;
}

.card-heading h2,
.result-heading h2 {
  margin: 0;
  font-size: 1.45rem;
  letter-spacing: -0.025em;
}

.card-heading .step-label,
.result-heading .step-label {
  margin-bottom: 7px;
}

.defaults-status {
  flex: 0 0 auto;
  color: var(--success);
  border-color: rgba(35, 132, 95, 0.22);
  background: rgba(35, 132, 95, 0.07);
}

.defaults-status.is-custom {
  color: var(--warning);
  border-color: rgba(146, 97, 13, 0.24);
  background: rgba(217, 151, 35, 0.09);
}

.drop-zone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 228px;
  padding: 32px 20px;
  overflow: hidden;
  cursor: pointer;
  text-align: center;
  border: 1.5px dashed var(--line-dark);
  border-radius: 15px;
  background:
    linear-gradient(135deg, rgba(39, 143, 208, 0.035), rgba(39, 143, 208, 0.09)),
    var(--paper);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.drop-zone::after {
  position: absolute;
  inset: auto -48px -68px auto;
  width: 170px;
  height: 170px;
  content: "";
  border: 24px solid rgba(39, 143, 208, 0.055);
  border-radius: 50%;
}

.drop-zone:hover,
.drop-zone.is-dragging {
  border-color: var(--blue);
  background:
    linear-gradient(135deg, rgba(39, 143, 208, 0.08), rgba(39, 143, 208, 0.14)),
    var(--paper);
}

.drop-zone.is-dragging {
  transform: translateY(-2px);
}

.drop-zone.has-file {
  border-style: solid;
  border-color: rgba(35, 132, 95, 0.36);
  background: rgba(35, 132, 95, 0.055);
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.upload-mark {
  display: grid;
  place-items: center;
  width: 50px;
  height: 50px;
  margin-bottom: 18px;
  color: var(--action-ink);
  border-radius: 14px;
  background: var(--action-bg);
  box-shadow: var(--action-shadow);
  font-size: 1.45rem;
  line-height: 1;
}

.drop-title {
  position: relative;
  z-index: 1;
  max-width: 90%;
  overflow: hidden;
  font-size: 1.02rem;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.drop-copy {
  position: relative;
  z-index: 1;
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.5;
}

.drop-requirements {
  position: relative;
  z-index: 1;
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.5;
}

.selected-files {
  position: relative;
  z-index: 1;
  display: grid;
  width: min(100%, 440px);
  gap: 7px;
  margin-top: 17px;
}

.selected-file {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  min-width: 0;
  padding: 9px 11px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-solid);
  text-align: left;
}

.selected-file-name {
  min-width: 0;
  overflow: hidden;
  font-size: 0.76rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.selected-file-size {
  color: var(--ink-soft);
  font-size: 0.69rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.field-block {
  margin-top: 30px;
}

.field-block > label,
.setting-grid label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 760;
}

.month-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 9px;
}

input[type="month"],
input[type="number"] {
  min-width: 0;
  color: var(--ink);
  border: 1px solid var(--line-dark);
  border-radius: 10px;
  background: var(--surface-solid);
}

input[type="month"] {
  width: min(260px, 100%);
  min-height: 48px;
  padding: 10px 13px;
  font-weight: 680;
}

input[type="number"] {
  width: 100%;
  min-height: 43px;
  padding: 8px 10px;
  font-variant-numeric: tabular-nums;
}

input:hover {
  border-color: var(--input-hover-border);
}

.text-button,
.icon-button {
  padding: 0;
  cursor: pointer;
  color: var(--blue-dark);
  border: 0;
  background: transparent;
  font-size: 0.8rem;
  font-weight: 800;
}

.text-button:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.field-help {
  margin: 8px 0 0;
  color: var(--ink-soft);
  font-size: 0.78rem;
}

.advanced {
  margin-top: 30px;
  border: 1px solid var(--line);
  border-radius: 13px;
  background: var(--surface-muted);
}

.advanced summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.advanced summary::-webkit-details-marker {
  display: none;
}

.advanced summary > span:first-child {
  display: grid;
  gap: 4px;
}

.advanced summary strong {
  font-size: 0.87rem;
}

.advanced summary small {
  color: var(--ink-soft);
  font-size: 0.74rem;
  font-weight: 500;
}

.chevron {
  font-size: 1.3rem;
  transition: transform 160ms ease;
}

.advanced[open] .chevron {
  transform: rotate(180deg);
}

.advanced-body {
  padding: 0 18px 20px;
  border-top: 1px solid var(--line);
}

.advanced-heading {
  align-items: center;
  padding: 16px 0 8px;
}

.advanced-heading p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.75rem;
  line-height: 1.45;
}

.layout-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 7px 14px;
}

.layout-actions .text-button {
  white-space: nowrap;
}

fieldset {
  min-width: 0;
  margin: 15px 0 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 10px;
  font-size: 0.74rem;
  font-weight: 850;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.setting-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 11px;
}

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

.setting-grid label {
  color: var(--ink-soft);
  font-size: 0.72rem;
}

.combined-settings-note {
  margin: 17px 0 2px;
  padding: 10px 12px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--surface-solid);
  font-size: 0.72rem;
  line-height: 1.5;
}

.canvas-lock {
  margin: 18px 0 0;
  padding: 11px 13px;
  color: var(--ink-soft);
  border-left: 3px solid var(--blue);
  background: var(--blue-pale);
  font-size: 0.73rem;
  line-height: 1.5;
}

.save-defaults-row {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  margin-top: 18px;
}

#layout-message {
  flex: 1 1 auto;
  margin: 0;
  color: var(--success);
  font-size: 0.74rem;
  line-height: 1.45;
}

#layout-message.is-error {
  color: var(--danger);
}

.save-defaults-button {
  flex: 0 0 auto;
  min-height: 42px;
  padding: 9px 14px;
  font-size: 0.78rem;
}

.form-message {
  margin-top: 22px;
  padding: 12px 14px;
  color: var(--danger);
  border: 1px solid rgba(163, 60, 55, 0.23);
  border-radius: 10px;
  background: rgba(163, 60, 55, 0.07);
  font-size: 0.82rem;
  line-height: 1.5;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 51px;
  padding: 13px 18px;
  cursor: pointer;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 820;
  text-decoration: none;
  transition: background 150ms ease, border-color 150ms ease, transform 150ms ease;
}

#format-button {
  justify-content: space-between;
  width: 100%;
  margin-top: 24px;
}

.primary-button {
  color: var(--action-ink);
  border: 1px solid var(--action-bg);
  background: var(--action-bg);
}

.primary-button:hover {
  border-color: var(--action-hover);
  background: var(--action-hover);
  transform: translateY(-1px);
}

.primary-button:disabled {
  cursor: wait;
  opacity: 0.68;
  transform: none;
}

.button-arrow {
  font-size: 1.3rem;
  font-weight: 400;
}

.secondary-button {
  color: var(--ink);
  border: 1px solid var(--line-dark);
  background: var(--surface-solid);
}

.secondary-button:hover {
  border-color: var(--ink-soft);
  background: var(--surface-hover);
}

.secondary-button:disabled {
  cursor: wait;
  opacity: 0.65;
}

.result-card,
.history-card {
  padding: 26px;
}

.result-card {
  border-color: rgba(35, 132, 95, 0.22);
}

.result-heading {
  margin-bottom: 20px;
}

.success-mark {
  display: grid;
  place-items: center;
  width: 35px;
  height: 35px;
  color: var(--success-ink);
  border-radius: 50%;
  background: var(--success);
  font-weight: 900;
}

.preview-shell {
  padding: 8px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: var(--preview-bg);
}

.preview-shell img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 5px;
  background: white;
}

.result-name {
  margin: 13px 0 0;
  overflow-wrap: anywhere;
  color: var(--ink-soft);
  font-size: 0.78rem;
  text-align: center;
}

.result-actions {
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
  margin-top: 18px;
}

.compact-heading {
  align-items: center;
  margin-bottom: 18px;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 1.05rem;
}

.icon-button:hover {
  background: var(--blue-pale);
}

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

.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  padding: 12px;
  color: inherit;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-solid);
  text-decoration: none;
  transition: border-color 150ms ease, background 150ms ease;
}

.history-item:hover {
  border-color: rgba(39, 143, 208, 0.48);
  background: var(--blue-pale);
}

.history-file {
  min-width: 0;
}

.history-file strong,
.history-file small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.history-file strong {
  font-size: 0.8rem;
}

.history-file small {
  margin-top: 3px;
  color: var(--ink-soft);
  font-size: 0.69rem;
}

.history-download {
  flex: 0 0 auto;
  color: var(--blue-dark);
  font-size: 1.05rem;
}

.empty-state,
.retention-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.74rem;
  line-height: 1.55;
}

.empty-state {
  padding: 22px 12px;
  border: 1px dashed var(--line-dark);
  border-radius: 10px;
  text-align: center;
}

.retention-note {
  margin-top: 15px;
}

.privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 0 8px;
  color: var(--ink-soft);
}

.privacy-note > span {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border: 1px solid var(--line-dark);
  border-radius: 50%;
  font-size: 0.82rem;
}

.privacy-note p {
  margin: 3px 0 0;
  font-size: 0.73rem;
  line-height: 1.6;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 25px 0 32px;
  color: var(--ink-soft);
  border-top: 1px solid var(--border-subtle);
  font-size: 0.72rem;
}

body.is-busy .drop-zone,
body.is-busy .advanced,
body.is-busy .field-block {
  opacity: 0.66;
  pointer-events: none;
}

@media (max-width: 860px) {
  .workspace {
    grid-template-columns: 1fr;
  }

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

  .result-card,
  .privacy-note {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  .site-header,
  main,
  footer {
    width: min(100% - 24px, 1180px);
  }

  .site-header {
    flex-wrap: wrap;
    gap: 10px;
    min-height: 82px;
    padding: 14px 0;
  }

  .brand img {
    width: 165px;
  }

  .header-actions {
    flex: 1 1 100%;
    justify-content: space-between;
    gap: 8px;
  }

  .theme-option {
    min-height: 29px;
    padding: 5px 8px;
    font-size: 0.66rem;
  }

  .local-badge {
    padding: 7px 9px;
    font-size: 0.68rem;
  }

  .intro {
    padding: 52px 4px 38px;
  }

  h1 {
    font-size: clamp(2.5rem, 13vw, 4rem);
  }

  .lede {
    font-size: 0.98rem;
  }

  .form-card,
  .result-card,
  .history-card {
    padding: 22px;
    border-radius: 16px;
  }

  .drop-zone {
    min-height: 205px;
  }

  .month-row {
    align-items: flex-start;
    flex-direction: column;
  }

  input[type="month"] {
    width: 100%;
  }

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

  .advanced-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .layout-actions {
    justify-content: flex-start;
  }

  .save-defaults-row {
    align-items: stretch;
    flex-direction: column;
  }

  .side-column {
    grid-template-columns: 1fr;
  }

  .result-card,
  .privacy-note {
    grid-column: auto;
  }

  footer {
    flex-direction: column;
  }
}

@media (max-width: 420px) {
  .card-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .compact-heading {
    align-items: center;
    flex-direction: row;
  }

  .setting-grid,
  .setting-grid--three {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}