:root {
  --bg: #ececeb;
  --surface: #fbfbf8;
  --surface-strong: #ffffff;
  --text: #202427;
  --muted: #666d72;
  --line: rgba(32, 36, 39, 0.16);
  --line-strong: rgba(32, 36, 39, 0.32);
  --accent: #8f3f32;
  --accent-dark: #5d2e28;
  --accent-soft: rgba(143, 63, 50, 0.12);
  --accent-line: rgba(143, 63, 50, 0.38);
  --red: #bf4337;
  --green: #4b7c63;
  --amber: #9d7a2e;
  --shadow: 0 12px 28px rgba(32, 36, 39, 0.07);
  --heading-font: "Futura", "Avenir Next", "Century Gothic", sans-serif;
  --body-font: "Avenir Next", "Helvetica Neue", Arial, sans-serif;
  --label-font: "SF Mono", Menlo, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.4 var(--body-font);
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 252, 0.8), rgba(236, 236, 235, 0.94)),
    repeating-linear-gradient(90deg, transparent, transparent 79px, rgba(32, 36, 39, 0.035) 79px, rgba(32, 36, 39, 0.035) 80px),
    repeating-linear-gradient(0deg, transparent, transparent 79px, rgba(32, 36, 39, 0.025) 79px, rgba(32, 36, 39, 0.025) 80px);
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

img {
  display: block;
}

.app-shell {
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 0 1rem 3rem;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.75rem;
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--line);
  background: rgba(248, 248, 246, 0.9);
  backdrop-filter: blur(12px);
}

.home-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-bottom: 2px solid transparent;
}

.home-mark:hover {
  border-bottom-color: var(--red);
}

.home-mark img {
  width: 1.75rem;
  height: 1.75rem;
}

.app-title {
  min-width: 0;
}

.app-title p,
.eyebrow {
  margin: 0;
  color: var(--muted);
  font: 600 0.72rem/1.2 var(--label-font);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.app-title h1,
.view-head h2 {
  margin: 0.1rem 0 0;
  color: var(--text);
  font-family: var(--heading-font);
  font-weight: 600;
  letter-spacing: 0.03em;
  line-height: 1.12;
  text-transform: uppercase;
}

.app-title h1 {
  font-size: 1.05rem;
}

.top-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 0.45rem;
  overflow-x: auto;
  padding-bottom: 0.08rem;
}

.top-actions button,
.quiet-button,
.small-button,
.secondary-button,
.primary-button,
.danger-button,
.icon-button {
  min-height: 2.65rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  color: var(--text);
}

.top-actions button {
  flex: 0 0 auto;
  padding: 0 0.85rem;
  color: var(--muted);
  font: 600 0.76rem/1 var(--label-font);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.top-actions button.is-active,
.top-actions button:hover {
  border-color: var(--line-strong);
  color: var(--text);
}

main {
  padding-top: 1rem;
}

.view {
  display: none;
}

.view.is-active {
  display: grid;
  gap: 1rem;
}

.view-head {
  display: flex;
  gap: 1rem;
  align-items: end;
  justify-content: space-between;
  padding: 0.25rem 0 0.8rem;
  border-bottom: 1px solid var(--line-strong);
}

.view-head h2 {
  font-size: 1.45rem;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.metric {
  min-height: 5rem;
  padding: 0.85rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 252, 0.78);
}

.metric b {
  display: block;
  font-size: 1.55rem;
  line-height: 1;
}

.metric span {
  display: block;
  margin-top: 0.35rem;
  color: var(--muted);
  font: 600 0.72rem/1.25 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.action-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.65rem;
}

.big-action {
  width: 100%;
  min-height: 4rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--accent-line);
  border-radius: 8px;
  background: var(--accent-dark);
  color: #fff;
  font-weight: 700;
  text-align: left;
}

.big-action.secondary {
  border-color: var(--line);
  background: var(--surface-strong);
  color: var(--text);
}

.panel {
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 252, 0.82);
  box-shadow: var(--shadow);
}

.panel.flat {
  padding: 0;
  border: 0;
  background: transparent;
  box-shadow: none;
}

.panel-head {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.7rem;
}

.panel-head h3 {
  margin: 0;
  font: 700 0.9rem/1.2 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.entry-form,
.stack {
  display: grid;
  gap: 0.9rem;
}

.form-mode {
  display: none;
  margin: 0;
  padding: 0.65rem 0.75rem;
  border-left: 3px solid var(--amber);
  background: rgba(157, 122, 46, 0.1);
  color: var(--text);
}

.form-mode:not(:empty) {
  display: block;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.7rem;
}

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

label,
.tag-field legend {
  display: grid;
  gap: 0.32rem;
  min-width: 0;
  color: var(--muted);
  font: 700 0.74rem/1.25 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

input,
select,
textarea {
  width: 100%;
  min-height: 2.8rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-strong);
  color: var(--text);
  font-family: var(--body-font);
  font-size: 1rem;
  letter-spacing: 0;
  text-transform: none;
}

input,
select {
  padding: 0 0.7rem;
}

select:has(option[value=""]:checked) {
  color: var(--muted);
}

select option {
  color: var(--text);
}

textarea {
  min-height: 6rem;
  padding: 0.75rem;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus,
button:focus-visible {
  outline: 2px solid rgba(143, 63, 50, 0.38);
  outline-offset: 2px;
}

.tag-field {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 0;
  padding: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.tag-field legend {
  padding: 0 0.25rem;
}

.tag-field label,
.checkbox-line {
  display: inline-flex;
  min-height: 2.45rem;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--text);
  font: 600 0.86rem/1.2 var(--body-font);
  letter-spacing: 0;
  text-transform: none;
}

.tag-field input,
.checkbox-line input {
  width: 1.05rem;
  min-height: 1.05rem;
  padding: 0;
}

.project-id-control.is-disabled {
  color: var(--muted);
}

.project-id-control input:disabled {
  background: rgba(255, 255, 255, 0.38);
  color: var(--muted);
  cursor: not-allowed;
}

.grade-counters {
  display: grid;
  gap: 0.55rem;
}

.quick-volume-panel {
  padding-top: 0.2rem;
}

.quick-volume-panel .panel-head {
  margin-bottom: 0.45rem;
}

.quick-volume-panel .grade-counters {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grade-row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) minmax(0, 1fr);
  gap: 0.45rem;
  align-items: center;
  min-height: 3.5rem;
  padding: 0.45rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 252, 0.72);
}

.quick-volume-panel .grade-row {
  grid-template-columns: 2.65rem minmax(0, 1fr);
  gap: 0.4rem;
  min-height: 0;
  padding: 0.5rem;
  background: rgba(255, 255, 252, 0.46);
}

.quick-volume-panel .grade-row > .counter-wrap:last-child {
  grid-column: 2;
}

.grade-label {
  font: 800 1rem/1 var(--label-font);
}

.counter-group {
  display: grid;
  grid-template-columns: 2.6rem minmax(2.5rem, 1fr) 2.6rem;
  align-items: center;
  min-height: 2.75rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-strong);
}

.counter-group button {
  width: 100%;
  min-height: 2.75rem;
  border: 0;
  background: transparent;
  color: var(--accent);
  font-size: 1.35rem;
  font-weight: 800;
}

.counter-group output {
  color: var(--text);
  font: 800 1.05rem/1 var(--label-font);
  text-align: center;
}

.counter-name {
  display: block;
  margin-bottom: 0.18rem;
  color: var(--muted);
  font: 600 0.63rem/1 var(--label-font);
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
}

.problem-list {
  display: grid;
  gap: 0.75rem;
}

.projects-panel .panel-head {
  margin-bottom: 0.55rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--line);
}

.problem-entry {
  display: grid;
  gap: 0.75rem;
  padding: 0.85rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(255, 255, 252, 0.9);
}

.problem-entry-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.problem-entry-head strong {
  font: 700 0.86rem/1 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.problem-core {
  align-items: end;
}

.problem-details {
  border-top: 1px solid var(--line);
  padding-top: 0.15rem;
}

.problem-details summary {
  display: flex;
  align-items: center;
  min-height: 2.35rem;
  cursor: pointer;
  color: var(--muted);
  font: 700 0.72rem/1.2 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

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

.problem-details summary::after {
  content: "+";
  margin-left: auto;
  color: var(--accent);
  font-size: 1rem;
}

.problem-details[open] summary::after {
  content: "-";
}

.problem-details > .form-grid,
.problem-details > .tag-field,
.problem-note-grid {
  margin-top: 0.55rem;
}

.problem-note-grid {
  display: grid;
  gap: 0.65rem;
}

.problem-note-grid textarea {
  min-height: 4.75rem;
}

.compact-tags {
  padding: 0.5rem;
}

.form-actions {
  position: sticky;
  bottom: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.55rem;
  padding: 0.75rem 0;
  background: linear-gradient(180deg, rgba(236, 236, 235, 0), rgba(236, 236, 235, 0.95) 30%);
}

.primary-button,
.secondary-button,
.danger-button,
.quiet-button,
.small-button {
  padding: 0 0.9rem;
  font-weight: 750;
}

.primary-button {
  border-color: var(--accent-line);
  background: var(--accent-dark);
  color: #fff;
}

.secondary-button,
.quiet-button,
.small-button {
  background: var(--surface-strong);
}

.danger-button {
  border-color: rgba(191, 67, 55, 0.52);
  background: rgba(191, 67, 55, 0.1);
  color: #7f1d16;
}

.icon-button {
  display: grid;
  width: 2.5rem;
  min-height: 2.5rem;
  place-items: center;
  padding: 0;
  color: var(--muted);
  font: 800 1rem/1 var(--label-font);
}

.recent-list,
.table-wrap {
  display: grid;
  gap: 0.55rem;
}

.recent-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  min-height: 3.8rem;
  padding: 0.65rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
}

.recent-item strong {
  display: block;
}

.recent-item span {
  display: block;
  margin-top: 0.15rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.row-actions {
  display: flex;
  gap: 0.4rem;
}

.row-actions button {
  min-height: 2.35rem;
  padding: 0 0.65rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-strong);
  color: var(--text);
  font-weight: 700;
}

.dashboard-grid,
.export-layout {
  display: grid;
  gap: 0.85rem;
}

.chart-panel {
  display: grid;
  gap: 0.7rem;
  padding: 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 252, 0.82);
}

.chart-panel h3 {
  margin: 0;
  font: 700 0.9rem/1.2 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  padding: 0.52rem 0.4rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  color: var(--muted);
  font: 700 0.68rem/1.2 var(--label-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.chart {
  width: 100%;
  height: 180px;
  overflow: visible;
}

.chart text {
  fill: var(--muted);
  font: 700 10px var(--label-font);
}

.chart .axis {
  stroke: rgba(32, 36, 39, 0.18);
  stroke-width: 1;
}

.chart .bar-a {
  fill: var(--accent);
}

.chart .bar-b {
  fill: var(--green);
}

.chart .line {
  fill: none;
  stroke: var(--red);
  stroke-width: 3;
}

.empty-state,
.small-copy {
  margin: 0;
  color: var(--muted);
}

.small-copy {
  font-size: 0.92rem;
}

.toast {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 40;
  max-width: min(26rem, calc(100vw - 2rem));
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
  color: var(--text);
  opacity: 0;
  transform: translateY(0.5rem);
  transition: opacity 160ms ease, transform 160ms ease;
  pointer-events: none;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 680px) {
  html {
    font-size: 15px;
  }

  .app-shell {
    padding-inline: 1.4rem;
  }

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

  .top-actions {
    grid-column: auto;
  }

  .summary-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

  .form-grid.compact {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .quick-volume-panel .grade-counters {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .dashboard-grid,
  .export-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .chart-panel.wide {
    grid-column: 1 / -1;
  }

  .view.is-active {
    gap: 0.85rem;
  }

  .view-head h2 {
    font-size: 1.32rem;
  }

  .metric {
    min-height: 4.5rem;
    padding: 0.75rem;
  }

  .metric b {
    font-size: 1.38rem;
  }

  .big-action {
    min-height: 3.55rem;
    padding: 0.75rem 0.9rem;
  }

  .entry-form,
  .stack {
    gap: 0.75rem;
  }

  input,
  select {
    min-height: 2.55rem;
  }

  textarea {
    min-height: 5.25rem;
  }

  .grade-row {
    min-height: 3.2rem;
  }

  .counter-group,
  .counter-group button {
    min-height: 2.5rem;
  }

  .tag-field label,
  .checkbox-line {
    min-height: 2.25rem;
    font-size: 0.82rem;
  }
}

@media (min-width: 980px) {
  .summary-grid {
    grid-template-columns: repeat(7, minmax(0, 1fr));
  }

  .entry-form {
    max-width: 960px;
  }

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

@media (max-width: 420px) {
  .app-shell {
    padding-inline: 0.75rem;
  }

  .view-head {
    align-items: start;
  }

  .view-head h2 {
    font-size: 1.24rem;
  }

  .form-grid,
  .form-grid.compact {
    grid-template-columns: 1fr;
  }

  .grade-row {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }

  .grade-row > .counter-wrap:last-child {
    grid-column: 2;
  }

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

  .recent-item {
    grid-template-columns: 1fr;
  }
}