/* Dutch матеріали: one column, light/dark via prefers-color-scheme. */

:root {
  color-scheme: light dark;
  --bg: #fafaf9;
  --surface: #ffffff;
  --soft: #f5f5f4;
  --text: #1c1917;
  --muted: #78716c;
  --border: #e7e5e4;
  --accent: #c2410c;
  --accent-ink: #ffffff;
  --danger: #dc2626;
  --on-danger: #ffffff;
  --ok: #15803d;
  --radius: 10px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #1c1917;
    --surface: #292524;
    --soft: #322d2a;
    --text: #f5f5f4;
    --muted: #a8a29e;
    --border: #44403c;
    --accent: #fb923c;
    --accent-ink: #1c1917;
    --danger: #dc2626;
    --on-danger: #ffffff;
    --ok: #4ade80;
  }
}

:root[data-theme="dark"] {
  --bg: #1c1917;
  --surface: #292524;
  --soft: #322d2a;
  --text: #f5f5f4;
  --muted: #a8a29e;
  --border: #44403c;
  --accent: #fb923c;
  --accent-ink: #1c1917;
  --danger: #dc2626;
  --on-danger: #ffffff;
  --ok: #4ade80;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.app {
  max-width: 640px;
  margin: 0 auto;
  padding: 12px 16px 48px;
}

button, input, select {
  font: inherit;
  color: inherit;
  min-height: 44px;
}

input, select {
  width: 100%;
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
}

button {
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  font-weight: 600;
}

button.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* header and tabs */
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 0 12px;
}

.top h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.2;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 4px;
  margin-bottom: 16px;
}

.tabs button {
  padding: 8px 4px;
  font-size: 15px;
}

.tabs button[aria-selected="true"] {
  background: var(--accent);
  color: var(--accent-ink);
  border-color: var(--accent);
  font-weight: 600;
}

/* forms */
.form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-bottom: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

.field > span {
  font-size: 13px;
  color: var(--muted);
}

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

.toolbar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  margin-bottom: 12px;
}

.toolbar select {
  width: auto;
  max-width: 50vw;
}

.row-form {
  display: flex;
  gap: 8px;
  margin: 12px 0 8px;
}

.row-form input {
  flex: 1;
  font-size: 18px;
}

/* 1 · table */
.tab,
.table-wrap {
  min-width: 0;
  max-width: 100%;
}

.table-wrap {
  position: relative;   /* keeps the absolutely positioned .sr-only header inside the scroller */
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

table.words {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
}

table.words th,
table.words td {
  padding: 8px 6px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

table.words th {
  font-size: 13px;
  color: var(--muted);
  font-weight: 500;
}

table.words td.w {
  font-weight: 600;
  overflow-wrap: anywhere;
}

.art {
  color: var(--accent);
  font-weight: 600;
}

.status {
  display: inline-block;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px 10px;
  font-size: 14px;
  white-space: nowrap;
}

.status.st-learning { color: var(--accent); border-color: var(--accent); }
.status.st-learned { color: var(--ok); border-color: var(--ok); }

.del {
  min-height: 36px;
  min-width: 36px;
  padding: 4px 8px;
  background: transparent;
  border-color: transparent;
  color: var(--muted);
  font-size: 18px;
  white-space: nowrap;
}

.del.armed {
  color: var(--danger);
  border-color: var(--danger);
  font-size: 14px;
  font-weight: 600;
}

/* 2 · cards */
.card {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 220px;
  padding: 24px 16px;
  margin-bottom: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  text-align: center;
}

#card-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

.card-nl {
  font-size: 30px;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.card-uk {
  font-size: 24px;
  overflow-wrap: anywhere;
}

.card-ex {
  font-size: 16px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.cards-settings {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.card-actions {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
}

.card-actions button,
.card-grades button {
  flex: 1 1 0;
  min-height: 52px;
  font-size: 17px;
}

.card-grades {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 8px;
}

.done {
  font-size: 22px;
  color: var(--muted);
}

/* 3 · practice */
.practice-q {
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 26px;
  font-weight: 600;
  padding: 16px 8px;
  overflow-wrap: anywhere;
}

.msg {
  min-height: 1.5em;
  margin: 8px 0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.msg.ok { color: var(--ok); }
.msg.bad { color: var(--danger); }

.practice-summary {
  margin: 16px 0;
  padding: 12px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.practice-summary__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.practice-summary__item {
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}

.practice-summary__item:last-child {
  border-bottom: none;
}

.practice-summary__extra-button {
  width: 100%;
  margin-top: 12px;
}

.practice-restart {
  margin-top: 8px;
}

/* 4 · rules */
.rules-list {
  margin-top: 12px;
}

details.rule {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 8px;
}

details.rule > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 14px;
  cursor: pointer;
  list-style: none;
}

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

.rule-title {
  flex: 1 1 auto;
  min-width: 0;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.badge {
  background: var(--danger);
  color: var(--on-danger);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  padding: 2px 8px;
}

.tag {
  margin-left: auto;
  text-align: right;
  font-size: 13px;
  color: var(--muted);
}

.rule-body {
  padding: 0 14px 14px;
  font-size: 15px;
  overflow-wrap: anywhere;
}

.rule-body p {
  margin: 8px 0;
}

.rule-body ul {
  margin: 8px 0;
  padding-left: 20px;
}

.rule-body .ex {
  border-left: 3px solid var(--accent);
  background: var(--soft);
  border-radius: 0 8px 8px 0;
  padding: 6px 10px;
  margin: 8px 0;
}

.scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 8px 0;
}

.rule-body table {
  border-collapse: collapse;
  font-size: 14px;
  min-width: 100%;
}

.rule-body th,
.rule-body td {
  border: 1px solid var(--border);
  padding: 4px 6px;
  text-align: left;
  vertical-align: top;
  overflow-wrap: normal;   /* break between words only; .scroll handles tables wider than the phone */
}

.mh {
  font-size: 14px;
  color: var(--accent);
  margin: 16px 0 6px;
}

.pat {
  border-top: 1px solid var(--border);
  padding: 8px 0;
}

.pat-head {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-weight: 600;
}

.pat-title {
  min-width: 0;
  overflow-wrap: anywhere;
}

.pat-count {
  flex-shrink: 0;
  color: var(--danger);
}

.pat-fix {
  font-size: 14px;
  margin-top: 2px;
  overflow-wrap: anywhere;
}

.cases {
  margin: 4px 0 0;
  padding-left: 18px;
  font-size: 14px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.cases s {
  color: var(--muted);
}

/* 5 · phrases and shared list */
.list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.item {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}

.item-main {
  flex: 1;
  min-width: 0;
  overflow-wrap: anywhere;
}

/* 6 · texts */
.text-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}

.text-title {
  font-size: 18px;
  margin: 0 0 4px;
  overflow-wrap: anywhere;
}

.pre-wrap {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  margin-top: 8px;
}

/* practice: "i" hints, skip button, schedule line, delete button */
.hint-field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.hint-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

.hint-button {
  flex: 0 0 auto;
  min-width: 36px;
  min-height: 36px;
  padding: 0;
  border-radius: 999px;
  border-color: var(--accent);
  background: transparent;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
}

.hint {
  margin: 6px 0 0;
  padding: 8px 10px;
  background: var(--soft);
  border-radius: 8px;
  font-size: 14px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.practice-skip {
  width: 100%;
  margin-bottom: 4px;
}

.practice-schedule {
  margin: 0;
  overflow-wrap: anywhere;
}

.practice-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.practice-meta__progress {
  flex: 1 1 auto;
  margin: 0;
}

.icon-button {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 8px;
  background: transparent;
  border-color: transparent;
  color: var(--muted);
}

.icon-button__icon {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* delete confirmation dialog */
.dialog {
  width: min(360px, calc(100vw - 32px));
  max-width: calc(100vw - 32px);
  margin: auto;
  padding: 16px;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
}

.dialog__title {
  margin: 0 0 8px;
  font-size: 18px;
}

.dialog__text {
  margin: 0 0 16px;
  overflow-wrap: anywhere;
}

.dialog__actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

button.danger {
  background: var(--danger);
  border-color: var(--danger);
  color: var(--on-danger);
  font-weight: 600;
}

/* shared */
.muted {
  color: var(--muted);
  font-size: 14px;
}

.center {
  text-align: center;
}

.empty {
  color: var(--muted);
  text-align: center;
  padding: 24px 0;
}

.list .empty {
  padding: 24px 0;
}

.notice {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 16px;
  max-width: 608px;
  margin: 0 auto;
  background: var(--danger);
  color: var(--on-danger);
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 600;
  overflow-wrap: anywhere;
  z-index: 10;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

/* login page */
.login {
  max-width: 360px;
  margin-top: 12vh;
}

.login h1 {
  font-size: 22px;
  margin: 0 0 16px;
}

.login form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.login .err {
  color: var(--danger);
  font-weight: 600;
  margin: 0;
}