:root {
  --ink: #122527;
  --muted: #52696c;
  --paper: #f1f7f6;
  --surface: #ffffff;
  --rule: #b5c9c7;
  --accent: #005e5a;
  --accent-ink: #ffffff;
  --complete: #2f784d;
  --danger: #a34036;
  --danger-surface: #fff0ec;
  --shadow: rgba(18, 37, 39, 0.16);
}

body[data-theme="dark"] {
  --ink: #edf7f5;
  --muted: #b7cdca;
  --paper: #102022;
  --surface: #172b2d;
  --rule: #557070;
  --accent: #70d0c3;
  --accent-ink: #092024;
  --complete: #88d99f;
  --danger: #ff9a8f;
  --danger-surface: #422422;
  --shadow: rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Avenir Next", "Trebuchet MS", "Segoe UI", sans-serif;
  line-height: 1.35;
}

button,
input {
  font: inherit;
}

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

button {
  cursor: pointer;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 4px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 1rem;
  padding: 0.65rem 0.85rem;
  background: var(--accent);
  color: var(--accent-ink);
  transform: translateY(-120%);
}

.skip-link:focus {
  transform: translateY(0);
}

.tape-label {
  display: inline-block;
  margin: 0;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  line-height: 1.1;
}

.masthead,
.editor-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  gap: clamp(1.25rem, 3vw, 3rem);
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(1.4rem, 3vw, 2.6rem) clamp(1.25rem, 4vw, 4rem) 1.25rem;
  border-bottom: 3px solid var(--ink);
}

.masthead-title h1,
.editor-header h1,
.login-card h1 {
  margin: 0.3rem 0 0;
  font-family: "Avenir Next Condensed", "Arial Narrow", "Trebuchet MS", sans-serif;
  font-size: clamp(3.4rem, 8vw, 7rem);
  font-stretch: condensed;
  font-weight: 800;
  letter-spacing: -0.075em;
  line-height: 0.82;
}

.editor-header h1 {
  font-size: clamp(2.6rem, 6vw, 5rem);
}

.full-date,
.login-intro {
  margin: 0.7rem 0 0;
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.35rem);
  font-weight: 650;
}

.progress-plate {
  display: grid;
  width: clamp(7rem, 12vw, 9.5rem);
  aspect-ratio: 1;
  align-content: center;
  justify-items: center;
  border: 3px solid var(--accent);
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 7px 7px 0 var(--accent);
  text-align: center;
}

.progress-plate strong {
  color: var(--accent);
  font-size: clamp(1.45rem, 3vw, 2.35rem);
  letter-spacing: -0.07em;
  line-height: 1;
}

.progress-plate span {
  margin-top: 0.35rem;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.account-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem 1rem;
  align-items: center;
}

.account-actions form {
  margin: 0;
}

.quiet-link,
.quiet-button {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 750;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

.quiet-button {
  padding: 0;
}

.board-main,
.editor-main {
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: clamp(1.5rem, 3vw, 3.25rem) clamp(1.25rem, 4vw, 4rem) 4rem;
}

.network-status {
  min-height: 1.4em;
  margin: 0 0 0.75rem;
  color: var(--danger);
  font-size: 1rem;
  font-weight: 700;
}

.task-board {
  border: 2px solid var(--ink);
  background: var(--surface);
  box-shadow: 11px 11px 0 var(--ink);
}

.list-heading {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  padding: 1rem clamp(1rem, 2vw, 1.6rem);
  border-bottom: 2px solid var(--ink);
  background: var(--accent);
  color: var(--accent-ink);
}

.list-heading p {
  margin: 0;
  font-size: clamp(1.15rem, 2vw, 1.5rem);
  font-weight: 800;
}

.list-heading span {
  font-size: 0.95rem;
  font-weight: 650;
}

.task-list {
  min-height: 8rem;
}

.task-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  width: 100%;
  min-height: clamp(5.5rem, 10vw, 7rem);
  align-items: center;
  gap: clamp(1rem, 2vw, 1.7rem);
  padding: 0.9rem clamp(1rem, 2.5vw, 1.75rem);
  border: 0;
  border-bottom: 2px solid var(--rule);
  background: transparent;
  color: inherit;
  text-align: left;
}

.task-item:last-child {
  border-bottom: 0;
}

.task-item:hover {
  background: color-mix(in srgb, var(--accent) 7%, transparent);
}

.task-item:disabled {
  cursor: wait;
}

.task-item.is-complete {
  color: var(--muted);
}

.task-item.is-complete .task-text {
  text-decoration: line-through;
  text-decoration-thickness: 0.12em;
}

.task-mark {
  display: grid;
  width: clamp(2.45rem, 5vw, 3.5rem);
  aspect-ratio: 1;
  place-items: center;
  border: 3px solid currentColor;
  border-radius: 50%;
  color: var(--accent);
  font-size: clamp(1.35rem, 3vw, 2.3rem);
  font-weight: 900;
  line-height: 1;
}

.is-complete .task-mark {
  border-color: var(--complete);
  background: var(--complete);
  color: #fff;
}

.task-text {
  overflow-wrap: anywhere;
  font-size: clamp(1.5rem, 3.2vw, 2.55rem);
  font-weight: 720;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.task-state {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.empty-state {
  display: grid;
  min-height: 12rem;
  place-items: center;
  padding: 2rem;
  color: var(--muted);
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  font-weight: 700;
  text-align: center;
}

.undo-toast {
  position: fixed;
  z-index: 5;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: min(32rem, calc(100vw - 2rem));
  padding: 0.9rem 1rem;
  border: 2px solid var(--ink);
  background: var(--surface);
  box-shadow: 5px 5px 0 var(--ink);
  font-weight: 700;
}

.undo-toast button {
  min-height: 2.5rem;
  padding: 0.35rem 0.8rem;
  border: 2px solid var(--accent);
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
}

.login-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 1.5rem;
}

.login-card {
  width: min(32rem, 100%);
  padding: clamp(1.75rem, 5vw, 3.5rem);
  border: 3px solid var(--ink);
  background: var(--surface);
  box-shadow: 13px 13px 0 var(--accent);
}

.login-card h1 {
  font-size: clamp(3.7rem, 11vw, 6.5rem);
}

.login-form,
.add-task-form {
  display: grid;
  gap: 0.75rem;
  margin-top: 2rem;
}

.login-form label,
.editor-row label {
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 800;
}

input {
  min-height: 3.35rem;
  width: 100%;
  padding: 0.55rem 0.75rem;
  border: 2px solid var(--ink);
  border-radius: 0;
  background: var(--surface);
  color: var(--ink);
  font-size: 1.15rem;
}

.primary-action,
.danger-action {
  min-height: 3.35rem;
  padding: 0.55rem 1rem;
  border: 2px solid var(--accent);
  border-radius: 0;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 850;
}

.danger-action {
  border-color: var(--danger);
  background: var(--danger);
  color: #fff;
}

.form-message {
  margin: 1.25rem 0 0;
  padding: 0.75rem;
  border-left: 4px solid var(--danger);
  background: var(--danger-surface);
  color: var(--ink);
  font-weight: 700;
}

.editor-main {
  display: grid;
  gap: 1.5rem;
}

.editor-section,
.replace-section {
  padding: clamp(1.15rem, 3vw, 2rem);
  border: 2px solid var(--ink);
  background: var(--surface);
}

.section-title h2,
.replace-section h2,
.replace-dialog h2 {
  margin: 0.35rem 0 0;
  font-size: clamp(1.5rem, 3vw, 2.3rem);
  letter-spacing: -0.04em;
}

.add-task-form {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: stretch;
  margin-top: 1.25rem;
}

.editor-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.editor-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.75rem;
  border: 2px solid var(--rule);
}

.editor-position {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.82rem;
  font-weight: 800;
}

.editor-task-form {
  display: flex;
  min-width: 0;
  gap: 0.5rem;
}

.editor-task-form input {
  min-width: 0;
}

.editor-controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.4rem;
}

.editor-controls button,
.small-action {
  min-height: 2.7rem;
  padding: 0.35rem 0.6rem;
  border: 2px solid var(--ink);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
}

.editor-controls .delete-button {
  border-color: var(--danger);
  color: var(--danger);
}

.editor-controls button:disabled {
  cursor: not-allowed;
  opacity: 0.4;
}

.replace-section {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  align-items: center;
  border-color: var(--danger);
}

.replace-section p:not(.tape-label) {
  max-width: 40rem;
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-weight: 600;
}

.replace-dialog {
  width: min(33rem, calc(100vw - 2rem));
  padding: clamp(1.25rem, 4vw, 2rem);
  border: 3px solid var(--ink);
  background: var(--surface);
  color: var(--ink);
  box-shadow: 10px 10px 0 var(--accent);
}

.replace-dialog::backdrop {
  background: rgba(10, 27, 29, 0.72);
}

.replace-dialog p:not(.tape-label) {
  color: var(--muted);
  font-weight: 600;
}

.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

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

@media (max-width: 760px) {
  .masthead,
  .editor-header {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .account-actions {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .list-heading,
  .replace-section {
    align-items: flex-start;
    flex-direction: column;
  }

  .task-state {
    display: none;
  }

  .add-task-form {
    grid-template-columns: 1fr;
  }

  .editor-row {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .editor-controls {
    grid-column: 1 / -1;
    justify-content: flex-start;
  }

  .editor-task-form {
    flex-wrap: wrap;
  }

  .editor-task-form .small-action {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}