:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: var(--app-font-size, 100%);
  --bg: #f5f7f6;
  --panel: #fff;
  --panel-soft: #fbfdfc;
  --card-bg: #fffdf9;
  --card-soft: #fff8f1;
  --card-line: #e7d9c8;
  --card-shadow: rgb(80 45 20 / 0.06);
  --text: #172426;
  --muted: #657478;
  --line: #d8e0de;
  --line-strong: #9fb0ae;
  --primary: #146c73;
  --primary-soft: #e6f2f1;
  --accent: var(--primary);
  --accent-contrast: #ffffff;
  --secondary-bg: #fff;
  --shadow: rgb(31 56 60 / 0.06);
  --warning-bg: #fff8df;
  --warning-line: #d4b15f;
  --warning-text: #4e3c12;
  --quiz-correct-bg: #e7f6ef;
  --quiz-correct-text: #134634;
  --quiz-correct-border: #2c8f6b;
  --quiz-incorrect-bg: #fff0eb;
  --quiz-incorrect-text: #6e2a18;
  --quiz-incorrect-border: #bb6b54;
  background: var(--bg);
  color: var(--text);
}

:root[data-theme="ink"] {
  --bg: #101417;
  --panel: #181f24;
  --panel-soft: #20292f;
  --card-bg: #181f24;
  --card-soft: #20292f;
  --card-line: #33434a;
  --card-shadow: rgb(0 0 0 / 0.22);
  --text: #eef5f2;
  --muted: #aab9b4;
  --line: #33434a;
  --line-strong: #5a6d74;
  --primary: #71d4bf;
  --primary-soft: #213d3a;
  --accent-contrast: #06231f;
  --secondary-bg: #11191d;
  --shadow: rgb(0 0 0 / 0.22);
  --warning-bg: #352d19;
  --warning-line: #8f7332;
  --warning-text: #f5e3ac;
  --quiz-correct-bg: #163d31;
  --quiz-correct-text: #c8f4e1;
  --quiz-correct-border: #3fae85;
  --quiz-incorrect-bg: #3d1d15;
  --quiz-incorrect-text: #f7c8b9;
  --quiz-incorrect-border: #c1755c;
}

:root[data-theme="sunrise"] {
  --bg: #f8f4ef;
  --panel: #fffdf9;
  --panel-soft: #fff8f0;
  --card-bg: #fffdf9;
  --card-soft: #fff8f1;
  --card-line: #e7d9c8;
  --card-shadow: rgb(80 45 20 / 0.06);
  --text: #2a2521;
  --muted: #746a61;
  --line: #e3d7ca;
  --line-strong: #b9a898;
  --primary: #9d4f2c;
  --primary-soft: #f7e5d9;
  --secondary-bg: #fffdf9;
  --shadow: rgb(95 69 43 / 0.08);
  --warning-bg: #fff2c9;
  --warning-line: #d8a83d;
  --warning-text: #4d3610;
}

:root[data-theme="sky"] {
  --bg: #f0f6fc;
  --panel: #ffffff;
  --panel-soft: #f6faff;
  --card-bg: #ffffff;
  --card-soft: #f6faff;
  --card-line: #d4e0ed;
  --card-shadow: rgb(31 70 120 / 0.08);
  --text: #122438;
  --muted: #5f7691;
  --line: #d4e0ed;
  --line-strong: #93acc6;
  --primary: #2566c8;
  --primary-soft: #e1ecff;
  --secondary-bg: #ffffff;
  --shadow: rgb(31 70 120 / 0.08);
  --warning-bg: #fff5d1;
  --warning-line: #d4b15f;
  --warning-text: #4e3c12;
}

:root[data-theme="rose"] {
  --bg: #fff4f3;
  --panel: #ffffff;
  --panel-soft: #fff8f7;
  --card-bg: #ffffff;
  --card-soft: #fff8f7;
  --card-line: #f3d3d2;
  --card-shadow: rgb(120 31 40 / 0.08);
  --text: #2c1518;
  --muted: #8a5e63;
  --line: #f3d3d2;
  --line-strong: #d28b8e;
  --primary: #c33b46;
  --primary-soft: #ffe0e1;
  --secondary-bg: #ffffff;
  --shadow: rgb(120 31 40 / 0.08);
  --warning-bg: #fff2c9;
  --warning-line: #d8a83d;
  --warning-text: #4d3610;
}

/* Candy pop: a bright, playful theme for younger learners. */
:root[data-theme="candy"] {
  --bg: #fff7fc;
  --panel: #ffffff;
  --panel-soft: #fdeffb;
  --card-bg: #ffffff;
  --card-soft: #fdeffb;
  --card-line: #f3cdec;
  --card-shadow: rgb(150 40 130 / 0.12);
  --text: #3a1846;
  --muted: #8a5c93;
  --line: #f3cdec;
  --line-strong: #e29ad6;
  --primary: #c8389b;
  --primary-soft: #ffe1f6;
  --accent: #7b3ff2;
  --accent-contrast: #ffffff;
  --secondary-bg: #ffffff;
  --shadow: rgb(150 40 130 / 0.12);
  --warning-bg: #fff3c4;
  --warning-line: #f5b301;
  --warning-text: #6b4e00;
}

/* Deep blue: a dark navy theme with bright, playful accents for younger learners. */
:root[data-theme="deepblue"] {
  --bg: #0e1c3f;
  --panel: #172c5b;
  --panel-soft: #1f3870;
  --card-bg: #172c5b;
  --card-soft: #1f3870;
  --card-line: #2e4885;
  --card-shadow: rgb(0 0 0 / 0.3);
  --text: #eef4ff;
  --muted: #a6bce6;
  --line: #2e4885;
  --line-strong: #5070b6;
  --primary: #4cc2ff;
  --primary-soft: #16315f;
  --accent: #ffd23f;
  --accent-contrast: #16264d;
  --secondary-bg: #14264f;
  --shadow: rgb(0 0 0 / 0.3);
  --warning-bg: #2d2a14;
  --warning-line: #8f7d32;
  --warning-text: #ffe9a8;
}

:root[data-theme="forest"] {
  --bg: #f2f6ef;
  --panel: #fffef9;
  --panel-soft: #f4faef;
  --card-bg: #fffef9;
  --card-soft: #f4faef;
  --card-line: #d7e3cd;
  --card-shadow: rgb(43 74 39 / 0.08);
  --text: #182819;
  --muted: #61705d;
  --line: #d7e3cd;
  --line-strong: #9eb391;
  --primary: #2f6f47;
  --primary-soft: #e3f1e5;
  --secondary-bg: #fffef9;
  --shadow: rgb(43 74 39 / 0.08);
  --warning-bg: #fff4cf;
  --warning-line: #d6aa45;
  --warning-text: #49370e;
}

:root[data-theme="lavender"] {
  --bg: #f7f3fb;
  --panel: #fffdfd;
  --panel-soft: #f7f1fb;
  --card-bg: #fffdfd;
  --card-soft: #f7f1fb;
  --card-line: #ded1e9;
  --card-shadow: rgb(83 58 108 / 0.08);
  --text: #261c32;
  --muted: #6e6178;
  --line: #ded1e9;
  --line-strong: #aa94bf;
  --primary: #7250a8;
  --primary-soft: #ece3f7;
  --secondary-bg: #fffdfd;
  --shadow: rgb(83 58 108 / 0.08);
  --warning-bg: #fff4cf;
  --warning-line: #d6aa45;
  --warning-text: #49370e;
}

:root[data-theme="graphite"] {
  --bg: #f1f2f2;
  --panel: #ffffff;
  --panel-soft: #f5f5f4;
  --card-bg: #ffffff;
  --card-soft: #f5f5f4;
  --card-line: #d9d6d0;
  --card-shadow: rgb(40 38 35 / 0.07);
  --text: #20201e;
  --muted: #6f6b65;
  --line: #d9d6d0;
  --line-strong: #aaa49a;
  --primary: #3f4a4a;
  --primary-soft: #e6e9e8;
  --secondary-bg: #ffffff;
  --shadow: rgb(40 38 35 / 0.07);
  --warning-bg: #fff4cf;
  --warning-line: #d6aa45;
  --warning-text: #49370e;
}

:root[data-theme="mint"] {
  --bg: #f3faf6;
  --panel: #fffefb;
  --panel-soft: #effaf4;
  --card-bg: #fffefb;
  --card-soft: #effaf4;
  --card-line: #cfe8da;
  --card-shadow: rgb(33 100 72 / 0.07);
  --text: #172722;
  --muted: #5f766e;
  --line: #cfe8da;
  --line-strong: #95b9a7;
  --primary: #207b68;
  --primary-soft: #dcf3ec;
  --secondary-bg: #fffefb;
  --shadow: rgb(33 100 72 / 0.07);
  --warning-bg: #fff4cf;
  --warning-line: #d6aa45;
  --warning-text: #49370e;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--bg);
  font-size: 1rem;
  /* Respect the notch / rounded corners in landscape (viewport-fit=cover). */
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
}

button,
input {
  font: inherit;
}

button,
.button-link {
  min-height: 38px;
  border: 0;
  border-radius: 10px;
  background: var(--primary);
  color: var(--panel);
  padding: 0 14px;
  cursor: pointer;
  font-size: 0.875rem;
}

.button-link {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

input[type="checkbox"] {
  width: 20px;
  min-height: 20px;
}

button[data-term] {
  text-align: left;
}

.secondary-button,
.secondary-link {
  border: 1px solid var(--line-strong);
  background: var(--secondary-bg);
  color: var(--text);
}

button:disabled {
  background: #8aa4ad;
  cursor: default;
}

#app {
  width: min(1240px, 100%);
  margin: 0 auto;
  padding: max(20px, env(safe-area-inset-top)) 24px calc(32px + env(safe-area-inset-bottom));
}

.app-menu[hidden] {
  display: none;
}

.app-menu {
  background: transparent;
  border: 0;
  box-shadow: none;
  margin-top: 0;
  padding: 0;
}

.menu-header {
  align-items: center;
  display: flex;
  gap: 24px;
  margin: 0 0 18px;
}

.menu-header h2 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
}

.menu-header button {
  min-height: 48px;
  padding: 0 18px;
}

body[data-menu-open="true"] #app > *:not(#appMenu) {
  display: none !important;
}

body[data-menu-open="true"] {
  background: var(--panel);
}

body[data-ai-chat-open="true"] #app > *:not(#aiChatPanel) {
  display: none !important;
}

body[data-ai-chat-open="true"] {
  background: var(--panel);
}

.ai-chat-tabs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 12px 0;
}

.ai-chat-tabs button {
  flex: 1 1 auto;
  min-width: 72px;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  color: var(--text);
  cursor: pointer;
}

.ai-chat-tabs button[aria-selected="true"] {
  background: var(--accent);
  color: var(--accent-contrast, #fff);
  border-color: var(--accent);
  font-weight: 700;
  box-shadow: 0 2px 6px var(--shadow);
}

.ai-chat-content {
  display: grid;
  gap: 12px;
}

.ai-chat-section {
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
}

.ai-chat-section h3 {
  margin: 0 0 8px;
}

.zh-text {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.ai-morphology-grid {
  display: grid;
  gap: 8px;
  margin: 8px 0;
}

.ai-morpheme {
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  padding: 8px 10px;
  background: var(--panel);
}

.ai-morpheme .label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  font-weight: 700;
}

.ai-morpheme .morpheme {
  font-weight: 600;
}

.ai-example-list li {
  margin-bottom: 10px;
}

.ai-example-list li p {
  margin: 0;
}

#syncDetails {
  display: block;
  margin-top: 4px;
  font-size: 0.72rem;
  line-height: 1.35;
  font-weight: 400;
}

.input-invalid {
  color: #d11;
}

.spelling-review {
  display: grid;
  gap: 8px;
}

.spelling-progress {
  font-size: 0.78rem;
  color: var(--muted);
  margin: 0;
}

.spelling-hint-zh {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0;
}

.spelling-hint-en {
  margin: 0;
  color: var(--muted);
}

.spelling-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.spelling-controls input {
  flex: 1 1 auto;
  padding: 10px 12px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  font-size: 1.1rem;
}

.spelling-correct-flash {
  border-color: #0b6b3a !important;
  color: #0b6b3a;
}

.spelling-feedback {
  margin: 4px 0 0;
  min-height: 1.4em;
}

.spelling-feedback.correct {
  color: #0b6b3a;
  font-weight: 700;
}

.spelling-feedback.correct .spelling-correct-label {
  margin-right: 8px;
}

.spelling-feedback.correct .spelling-answer-correct {
  font-size: 1.4rem;
  letter-spacing: 0.02em;
}

.spelling-feedback.wrong .spelling-wrong-label {
  display: block;
  color: var(--muted);
  font-size: 0.8rem;
}

.spelling-feedback.wrong .spelling-answer {
  display: block;
  color: #0b6b3a;
  font-weight: 700;
  font-size: 1.6rem;
  letter-spacing: 0.02em;
}

.spelling-feedback.wrong .spelling-retry-hint {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 400;
}

.track-tabs {
  display: flex;
  gap: 8px;
  margin: 10px 0 14px;
  flex-wrap: wrap;
}

.track-tabs button {
  flex: 0 0 auto;
  min-height: 38px;
  padding: 0 14px;
  border: 1px solid var(--card-line);
  background: var(--card-soft);
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.875rem;
}

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

.auth-diagnostics {
  margin-top: 10px;
  padding: 10px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 0.72rem;
  line-height: 1.4;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 320px;
  overflow: auto;
}

.ai-chat-loading {
  padding: 20px;
  text-align: center;
  color: var(--muted);
}

.ai-chat-error {
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
  color: #b91c1c;
}

.ai-synonym-row {
  border-top: 1px solid var(--line);
  padding-top: 8px;
  margin-top: 8px;
}

.ai-synonym-row:first-child {
  border-top: 0;
  padding-top: 0;
  margin-top: 0;
}

.ai-synonym-row strong {
  display: inline-block;
  margin-right: 6px;
}

.ai-quiz-mode-picker {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.ai-quiz-mode-picker button {
  padding: 6px 10px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--text);
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.85rem;
}

.ai-quiz-mode-picker button[aria-pressed="true"] {
  background: var(--accent);
  color: var(--accent-contrast, #fff);
  border-color: var(--accent);
}

.ai-quiz-card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
}

.ai-quiz-prompt {
  font-weight: 600;
  margin: 0 0 10px;
}

.ai-quiz-options {
  display: grid;
  gap: 6px;
}

.ai-quiz-options button {
  text-align: left;
  padding: 8px 12px;
  border: 1px solid var(--line);
  background: var(--panel-soft);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
}

.ai-quiz-options button[data-state="correct"] {
  background: rgba(0, 158, 115, 0.18);
  border-color: #009e73;
}

.ai-quiz-options button[data-state="wrong"] {
  background: rgba(213, 94, 0, 0.18);
  border-color: #d55e00;
}

.ai-quiz-input-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

.ai-quiz-input-row input {
  flex: 1;
}

.ai-quiz-feedback {
  margin-top: 8px;
  font-weight: 600;
}

.ai-quiz-feedback.ok {
  color: #009e73;
}

.ai-quiz-feedback.bad {
  color: #d55e00;
}

.ai-chat-button {
  background: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 10px;
  cursor: pointer;
  font-size: 0.85rem;
  color: var(--text);
}

.ai-chat-button:hover {
  background: var(--panel-soft);
}

.menu-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.menu-grid div {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  grid-template-rows: auto auto;
  column-gap: 12px;
  align-items: start;
  border: 1px solid var(--card-line);
  border-radius: 12px;
  padding: 16px;
  background: var(--card-bg);
  box-shadow: 0 4px 14px var(--card-shadow);
  min-width: 0;
}

.menu-grid span {
  display: block;
  color: color-mix(in srgb, var(--primary) 70%, var(--text));
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.menu-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 1rem;
  grid-column: 2;
  overflow-wrap: anywhere;
}

.settings-status-card > span:not(.settings-card-icon) {
  grid-column: 2;
}

.settings-status-card small {
  grid-column: 1 / -1;
  max-width: 100%;
  overflow-wrap: normal;
  word-break: normal;
}

.settings-card-icon {
  align-items: center;
  background: var(--primary-soft);
  border: 1px solid color-mix(in srgb, var(--primary) 22%, var(--card-line));
  border-radius: 999px;
  color: var(--primary);
  display: inline-flex;
  flex: 0 0 auto;
  font-weight: 800;
  height: 34px;
  justify-content: center;
  line-height: 1;
  margin: 0;
  width: 34px;
}

.menu-grid .settings-card-icon {
  grid-row: 1 / span 2;
}

.settings-info,
.settings-card {
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  box-shadow: 0 4px 14px var(--card-shadow);
}

.settings-info[hidden] {
  display: none;
}

.settings-info {
  align-items: flex-start;
  display: flex;
  gap: 14px;
  margin-bottom: 18px;
  padding: 16px 18px;
}

.settings-info p {
  margin: 0 0 12px;
}

.settings-info p:last-child {
  margin-bottom: 0;
}

.settings-layout {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
}

.settings-stack {
  display: grid;
  gap: 14px;
  min-width: 0;
}

.settings-card {
  padding: 18px;
}

.settings-card h3 {
  align-items: center;
  color: color-mix(in srgb, var(--primary) 72%, var(--text));
  display: flex;
  font-size: 0.9rem;
  gap: 10px;
  letter-spacing: 0;
  margin: 0 0 16px;
  text-transform: uppercase;
}

.settings-card h3 .settings-card-icon {
  height: 30px;
  margin: 0;
  width: 30px;
}

.menu-actions {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.account-actions,
.diagnostics-actions {
  grid-template-columns: repeat(3, minmax(132px, 1fr));
}

.danger-actions {
  align-items: center;
  background: color-mix(in srgb, #d93025 8%, var(--card-bg));
  border: 1px solid color-mix(in srgb, #d93025 24%, var(--card-line));
  border-radius: 10px;
  display: grid;
  gap: 14px;
  grid-template-columns: minmax(0, 1fr) auto;
  padding: 16px;
}

.danger-zone {
  margin-top: 18px;
}

.danger-button {
  background: #c9362c;
  color: #fff;
  min-width: 280px;
}

.danger-button:hover {
  background: #9a3e30;
}

:root[data-theme="ink"] .danger-button,
:root[data-theme="deepblue"] .danger-button {
  background: #d96452;
  color: #1a1011;
}

:root[data-theme="ink"] .danger-button:hover,
:root[data-theme="deepblue"] .danger-button:hover {
  background: #c2543f;
}

.settings-grid {
  display: grid;
  gap: 0;
}

.settings-grid label {
  border-bottom: 1px solid var(--card-line);
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  margin: 0;
  min-height: 58px;
  padding: 8px 0;
}

/* Dropdown rows: label on the left, control filling the rest beside it. */
.settings-grid label select {
  flex: 1 1 auto;
}

/* Checkbox rows: keep the checkbox and its label adjacent on the left. */
.settings-grid label.toggle-row {
  grid-template-columns: minmax(0, 1fr) auto;
  justify-content: stretch;
}

.settings-grid label:last-child,
.settings-grid .font-zoom-row:last-child {
  border-bottom: 0;
}

.font-zoom-row {
  border-bottom: 1px solid var(--card-line);
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  align-items: center;
  gap: 16px;
  min-height: 58px;
  padding: 8px 0;
}

.font-zoom-row > span {
  font-weight: 800;
}

.font-zoom-controls {
  display: grid;
  grid-template-columns: minmax(72px, 90px) minmax(54px, 1fr) minmax(72px, 90px);
  align-items: center;
  gap: 8px;
}

.font-zoom-controls button {
  min-width: 48px;
  min-height: 36px;
  padding: 0 10px;
  font-weight: 800;
}

.font-zoom-controls strong {
  text-align: center;
}

select {
  min-height: 42px;
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  padding: 0 14px;
  background: var(--panel-soft);
  color: var(--text);
}

.auth-panel,
.debug-panel {
  border-top: 0;
  margin-top: 0;
  padding-top: 0;
}

.toggle-row input[type="checkbox"] {
  appearance: none;
  background: var(--line-strong);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  height: 30px;
  min-height: 30px;
  position: relative;
  transition: background 0.18s ease;
  width: 54px;
}

.toggle-row input[type="checkbox"]::after {
  background: #fff;
  border-radius: 999px;
  box-shadow: 0 1px 4px rgb(0 0 0 / 0.16);
  content: "";
  height: 24px;
  left: 3px;
  position: absolute;
  top: 3px;
  transition: transform 0.18s ease;
  width: 24px;
}

.toggle-row input[type="checkbox"]:checked {
  background: var(--primary);
}

.toggle-row input[type="checkbox"]:checked::after {
  transform: translateX(24px);
}

.icon-button {
  width: 44px;
  min-width: 44px;
  height: 44px;
  padding: 0;
  font-size: 1.25rem;
  line-height: 1;
}

.app-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.app-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

.app-brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
}

.app-brand-text {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
  white-space: nowrap;
}

.app-brand-text h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.08;
}

.app-tagline {
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.45;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  padding: 14px 0 18px;
}

.brand-block {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 6px;
  color: #146c73;
  font-weight: 800;
  text-transform: uppercase;
  font-size: 0.78rem;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 4px;
  font-size: 2rem;
  line-height: 1.08;
}

.hero-copy {
  margin: 0;
  color: #51676b;
  line-height: 1.4;
}

.status-pill {
  border: 1px solid #b8c7c4;
  border-radius: 999px;
  padding: 8px 12px;
  background: #fff;
  color: #356066;
  white-space: nowrap;
  font-size: 0.9rem;
}

.notice-banner {
  border: 1px solid var(--warning-line);
  border-radius: 8px;
  background: var(--warning-bg);
  color: var(--warning-text);
  padding: 12px 14px;
  line-height: 1.4;
  margin: 4px 0 12px;
}

.card,
.panel,
.search-surface,
.status-card {
  background: var(--card-bg);
  border: 1px solid var(--card-line);
  border-radius: 16px;
  box-shadow: 0 4px 14px var(--card-shadow);
  padding: 20px;
}

.search-surface {
  margin: 0 0 24px;
}

.compact-panel,
.panel {
  margin: 0;
}

.dashboard {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(300px, 1fr);
  gap: 24px;
  align-items: start;
}

.dashboard-column {
  display: grid;
  gap: 24px;
  min-width: 0;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 12px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px;
  margin-top: 16px;
}

.stats-grid div {
  border: 1px solid var(--card-line);
  border-radius: 12px;
  padding: 12px;
  background: var(--card-soft);
}

.stats-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
}

.stats-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 1.375rem;
  font-weight: 700;
}

.status-card {
  padding: 12px;
}

.status-card span {
  display: block;
  color: #607377;
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

.status-card strong {
  display: block;
  margin-top: 4px;
  font-size: 1rem;
}

.toolbar,
.search-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.search-row {
  align-items: stretch;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
}

.search-row input {
  min-width: 0;
}

/* Transient "Undo" affordance shown right after a word is saved. */
.undo-button {
  flex: 0 0 auto;
  align-self: stretch;
  background: var(--accent, var(--primary));
  color: var(--accent-contrast, #fff);
  border: 0;
  padding: 0 14px;
  font-weight: 700;
  border-radius: 8px;
}

.undo-button[hidden] {
  display: none;
}

.metrics {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.metrics div {
  display: grid;
  grid-template-columns: 128px 1fr;
  gap: 12px;
  padding-top: 10px;
  border-top: 1px solid #edf1ef;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 14px;
}

.panel-head h2 {
  margin: 0 0 6px;
  font-size: 1.375rem;
  font-weight: 700;
  line-height: 1.15;
}

.muted {
  font-size: 0.9375rem;
  line-height: 1.45;
}

.toggle-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  margin: 0;
  white-space: nowrap;
}

.study-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.study-one-more-control {
  align-items: center;
  display: flex;
  gap: 8px;
}

.study-one-more-hint {
  margin: -4px 0 4px;
}

.study-one-more-filter-popup {
  background: var(--panel);
  border-top: 1px solid var(--line-strong);
  bottom: 0;
  box-shadow: 0 -2px 16px var(--shadow);
  left: 0;
  max-height: 75dvh;
  overflow-y: auto;
  padding: 16px max(16px, env(safe-area-inset-right)) calc(16px + env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  position: fixed;
  right: 0;
  z-index: 100;
}

.filter-popup-header {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin-bottom: 16px;
}

.filter-row {
  margin-bottom: 14px;
}

.filter-row-actions {
  margin-top: 4px;
}

.filter-section-label {
  display: block;
  font-size: 0.85em;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 8px;
  opacity: 0.7;
  text-transform: uppercase;
}

.filter-range-row {
  align-items: center;
  display: flex;
  gap: 10px;
}

.filter-number-input {
  min-height: 40px;
  min-width: 0;
  padding: 0 10px;
  width: 96px;
}

.filter-range-sep {
  flex-shrink: 0;
}

.filter-tags-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.filter-tag-label {
  align-items: center;
  display: flex;
  font-weight: 400;
  gap: 6px;
  margin-bottom: 0;
  white-space: nowrap;
}

label {
  display: block;
  font-weight: 800;
  margin-bottom: 8px;
}

input {
  width: 100%;
  min-height: 52px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 0 14px;
  font-size: 1rem;
  background: var(--panel-soft);
  color: var(--text);
}

input:focus {
  outline: 3px solid color-mix(in srgb, var(--primary) 20%, transparent);
  border-color: var(--primary);
}

.suggestions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.suggestions button {
  min-height: 32px;
  background: var(--card-soft);
  color: var(--text);
  padding: 0 12px;
  border: 1px solid var(--card-line);
}

.suggestions .fuzzy {
  background: #f5eee0;
  color: #4b3616;
}

.recent-popover {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.recent-popover[hidden] {
  display: none;
}

.recent-popover button {
  min-height: 34px;
  background: var(--primary-soft);
  color: var(--text);
}

.result {
  margin-top: 10px;
}

.result-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.result-actions,
.vocab-actions,
.quiz-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.result-actions button,
.vocab-actions button,
.quiz-actions button {
  min-height: 38px;
}

.fsrs-rating-panel {
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

.fsrs-ratings button {
  min-width: 72px;
  pointer-events: auto;
  position: relative;
  touch-action: manipulation;
  -webkit-tap-highlight-color: rgba(189, 83, 38, 0.18);
  z-index: 1;
}

.review-debug-panel {
  position: fixed;
  inset: auto 12px 12px 12px;
  z-index: 1000;
  max-height: 40vh;
  overflow: auto;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(255, 253, 249, 0.96);
  box-shadow: 0 8px 24px rgba(80, 45, 20, 0.18);
  padding: 8px 10px;
  pointer-events: none;
}

.review-debug-panel summary {
  cursor: pointer;
  font-weight: 700;
}

.review-debug-panel pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.75rem;
}

.result-option {
  display: block;
  width: 100%;
  min-height: 0;
  background: var(--panel-soft);
  color: var(--text);
  border: 1px solid var(--line);
  padding: 12px;
  text-align: left;
}

.result-option strong,
.result-option span {
  display: block;
}

.result-option span {
  color: var(--muted);
  margin-top: 4px;
  line-height: 1.35;
}

.result-head {
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 8px;
  margin-bottom: 10px;
}

.result-head h2 {
  margin: 0;
  font-size: 1.35rem;
}

.result-title-row {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.result-entry-type {
  color: var(--muted);
  margin: 0;
  font-size: 0.95rem;
}

.meaning-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.meaning-grid section {
  min-width: 0;
}

.meaning-grid p {
  line-height: 1.42;
}

h3 {
  margin-bottom: 8px;
}

h3 em {
  color: var(--muted);
  font-size: 0.85rem;
  font-style: normal;
  font-weight: 500;
}

.muted,
.small {
  color: var(--muted);
}

.small {
  font-size: 0.88rem;
}

.error {
  color: #a33b2f;
  font-weight: 700;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(15, 27, 33, 0.5);
}

.modal-panel {
  width: min(440px, 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 18px 60px rgba(15, 27, 33, 0.24);
  padding: 18px;
}

.modal-field {
  display: grid;
  gap: 6px;
  margin: 12px 0;
  font-weight: 800;
}

.modal-field input {
  width: 100%;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 14px;
}

ol {
  padding-left: 20px;
}

li {
  margin: 8px 0;
}

.history-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 10px 0;
}

.history-list li.muted {
  display: list-item;
}

li button {
  background: var(--primary-soft);
  color: var(--text);
}

.progress-list li {
  line-height: 1.45;
}

.raw-results {
  max-height: 420px;
  overflow: auto;
  border: 1px solid #ded8ca;
  border-radius: 8px;
  background: #fbfaf6;
  padding: 12px;
  white-space: pre-wrap;
}

.diagnostics-panel summary {
  cursor: pointer;
  font-weight: 800;
}

.word-prompt {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
}

.word-prompt[hidden] {
  display: none;
}

.word-prompt h2 {
  margin-bottom: 4px;
}

.quiz-panel {
  border-top: 1px solid var(--line);
  margin-top: 12px;
  padding-top: 12px;
}

.quiz-panel[hidden] {
  display: none;
}

.quiz-question {
  margin-bottom: 12px;
}

.quiz-question strong {
  display: block;
  font-size: 1.35rem;
  margin-top: 4px;
}

.word-ipa {
  color: var(--muted);
  display: inline-block;
  font-size: 0.9rem;
  line-height: 1.25;
}

.word-ipa.missing {
  opacity: 0.75;
}

.speaker-button {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--accent, #256d85);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;
  margin-left: 6px;
  padding: 4px 8px;
  vertical-align: middle;
}

.speaker-button:hover,
.speaker-button:focus-visible {
  background: rgba(37, 109, 133, 0.08);
  border-color: rgba(37, 109, 133, 0.2);
}

.vocab-row {
  align-items: center;
  display: flex;
  gap: 6px;
  justify-content: space-between;
}

.vocab-row > button[data-action="vocab-select"] {
  flex: 1;
}

.quiz-word-row {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 4px 0 8px;
}

.quiz-english {
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px 10px;
  margin: 6px 0 8px;
}

.quiz-english p {
  margin: 2px 0;
  line-height: 1.35;
}

.study-one-more-card {
  display: grid;
  gap: 10px;
}

.quiz-english-label {
  color: var(--muted);
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
  text-transform: uppercase;
}

.quiz-options {
  display: grid;
  gap: 10px;
}

.quiz-options button {
  align-items: flex-start;
  min-height: 0;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  color: var(--text);
  display: flex;
  gap: 10px;
  padding: 12px;
  text-align: left;
}

.quiz-option-key {
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  display: inline-flex;
  flex: 0 0 auto;
  font-size: 0.8rem;
  font-weight: 700;
  height: 26px;
  justify-content: center;
  line-height: 1;
  width: 26px;
}

.quiz-option-text {
  min-width: 0;
}

.quiz-options button.correct {
  border-color: var(--quiz-correct-border);
  background: var(--quiz-correct-bg);
  color: var(--quiz-correct-text);
}

.quiz-options button.correct .quiz-option-key {
  color: var(--quiz-correct-text);
}

.quiz-options button.incorrect {
  border-color: var(--quiz-incorrect-border);
  background: var(--quiz-incorrect-bg);
  color: var(--quiz-incorrect-text);
}

.quiz-options button.incorrect .quiz-option-key {
  color: var(--quiz-incorrect-text);
}

.vocabulary-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.vocab-stats {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.vocab-stat {
  display: grid;
  gap: 2px;
  min-height: 0;
  padding: 10px 8px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  color: var(--text);
}

.vocab-stat span {
  color: var(--muted);
  font-size: 0.78rem;
}

.vocab-stat strong {
  font-size: 1.25rem;
}

.vocab-filter-panel {
  display: grid;
  gap: 10px;
}

.vocab-filter-field {
  display: grid;
  gap: 6px;
  margin: 0;
}

.vocab-filter-field > span {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
}

.vocab-filter-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}

.vocab-filter-group {
  background: var(--card-soft);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0;
  min-width: 0;
  padding: 10px;
}

.vocab-filter-group legend {
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0 4px;
}

.vocab-filter-group label {
  display: grid;
  gap: 4px;
  margin: 0;
  min-width: 0;
}

.vocab-filter-group label span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.vocab-filter-group input {
  background: var(--panel-soft);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  color: var(--text);
  min-height: 38px;
  min-width: 0;
  padding: 0 8px;
}

.vocab-clear-filters {
  justify-self: start;
}

.vocab-browser-head,
.vocab-pager {
  align-items: center;
  display: flex;
  gap: 8px;
  justify-content: space-between;
}

.vocab-search-row {
  display: flex;
  gap: 8px;
  margin: 0 0 10px;
}

.vocab-search-row input {
  flex: 1;
  min-height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  padding: 0 12px;
  background: var(--panel-soft);
  color: var(--text);
}

.vocab-browser {
  display: grid;
  gap: 10px;
}

.vocab-word-list {
  display: grid;
  gap: 6px;
  list-style-position: inside;
  margin: 0;
  padding: 0;
}

.vocab-word-list li {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  padding: 8px;
}

.vocab-word-list li.selected {
  border-color: var(--accent);
}

.vocab-word-list li > button {
  display: grid;
  gap: 2px;
  background: transparent;
  color: var(--text);
  min-height: 0;
  padding: 4px;
  text-align: left;
}

.vocab-term {
  font-weight: 700;
}

.vocab-detail {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 4px;
  margin-top: 6px;
  padding-top: 8px;
}

.vocab-detail p {
  color: var(--muted);
  line-height: 1.35;
  margin: 4px 0;
}

.vocab-meta {
  color: var(--muted);
  font-size: 0.84rem;
}

@media (max-width: 620px) {
  .vocab-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .vocab-stat.total {
    grid-column: span 2;
  }

  .vocab-browser-head,
  .vocab-pager {
    align-items: stretch;
    flex-direction: column;
  }
}

.ai-detail-panel {
  border-top: 1px solid var(--line);
  margin-top: 10px;
  padding-top: 10px;
}

.ai-detail-panel[hidden] {
  display: none;
}

.ai-detail-panel h3 {
  margin-top: 0;
}

.ai-detail-panel pre {
  white-space: pre-wrap;
  overflow: auto;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}

.ai-card-grid {
  display: grid;
  gap: 10px;
}

.ai-meaning-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--panel-soft);
}

.ai-detail-actions {
  margin-top: 12px;
  display: grid;
  gap: 6px;
}

.ai-source-badge {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  vertical-align: middle;
}

.vocab-ai-detail {
  margin-top: 10px;
  padding: 10px;
  border: 1px dashed var(--line-strong);
  border-radius: 8px;
  background: var(--panel-soft);
  display: grid;
  gap: 4px;
}

.vocab-ai-detail strong {
  font-size: 0.85rem;
}

.ai-meaning-card h4 {
  margin: 0 0 6px;
}

.ai-meaning-card .example {
  margin: 6px 0;
  color: var(--muted);
}

.history-panel {
  min-height: 480px;
}

.history-head {
  align-items: flex-start;
}

.history-track-tabs {
  margin: 0;
  justify-content: flex-end;
}

.history-controls {
  align-items: center;
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 10px;
  justify-content: stretch;
  margin-top: 6px;
}

.history-granularity {
  background: var(--card-soft);
  border: 1px solid var(--card-line);
  border-radius: 12px;
  display: inline-flex;
  overflow: hidden;
  padding: 2px;
}

.history-granularity button {
  background: transparent;
  border: 0;
  border-radius: 10px;
  color: var(--text);
  font-size: 0.875rem;
  min-height: 34px;
  padding: 0 14px;
}

.history-granularity button[aria-selected="true"] {
  background: var(--primary);
  color: var(--panel);
}

.history-pager {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
}

.history-pager button {
  min-height: 38px;
  padding: 0 10px;
}

.history-pager input[type="date"] {
  background: var(--secondary-bg);
  border: 1px solid var(--line-strong);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  min-height: 38px;
  padding: 0 8px;
  width: 150px;
}

.history-range-label {
  color: var(--muted);
  margin-top: 4px;
}

.history-chart {
  height: 260px;
  margin-top: 12px;
  width: 100%;
}

.history-chart svg {
  display: block;
  height: 100%;
  max-width: 100%;
  width: 100%;
}

.history-chart .h-axis-label {
  fill: var(--muted);
  font-size: 10px;
  font-family: inherit;
}

.history-chart .h-value-label {
  fill: var(--muted);
  font-size: 9px;
  font-family: inherit;
}

.history-chart .h-grid {
  stroke: var(--line);
  stroke-dasharray: 2 4;
  stroke-width: 1;
}

.history-chart .h-bar {
  rx: 2;
  ry: 2;
}

.history-chart .h-bar-clickable {
  cursor: pointer;
}

.history-chart .h-bar-clickable:focus,
.history-chart .h-bar-clickable:hover {
  filter: brightness(0.92);
  outline: 2px solid color-mix(in srgb, var(--accent), transparent 20%);
  outline-offset: 2px;
}

.history-chart .h-bar-new {
  fill: #0072b2;
}

.history-chart .h-bar-reviewed {
  fill: #56b4e9;
}

.history-chart .h-bar-known {
  fill: #8b5cf6;
}

.history-chart .h-bar-up {
  fill: #009e73;
}

.history-chart .h-bar-down {
  fill: url(#h-hatch-down);
}

.history-chart .h-empty {
  color: var(--muted);
  padding: 20px;
  text-align: center;
}

.history-legend {
  align-items: center;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  font-size: 0.8rem;
  gap: 12px;
  margin-top: 8px;
}

.history-legend i.dot {
  border-radius: 999px;
  display: inline-block;
  height: 10px;
  margin-right: 4px;
  vertical-align: middle;
  width: 10px;
}

.history-legend i.dot-new {
  background: #0072b2;
}

.history-legend i.dot-reviewed {
  background: #56b4e9;
}

.history-legend i.dot-known {
  background: #8b5cf6;
}

.history-legend i.dot-up {
  background: #009e73;
}

.history-legend i.dot-down {
  background: repeating-linear-gradient(45deg, #d55e00 0 2px, #7a3500 2px 4px);
}

.history-drilldown {
  margin-top: 12px;
}

.history-drilldown:empty {
  display: none;
}

.history-drilldown-head {
  align-items: flex-start;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding-top: 14px;
}

.history-drilldown h3 {
  font-size: 1rem;
  margin: 0 0 4px;
}

.history-word-list {
  display: grid;
  gap: 8px;
  list-style: none;
  margin: 12px 0 0;
  max-height: 180px;
  overflow: auto;
  padding: 0;
}

.history-word-list button {
  background: var(--surface);
  border: 1px solid var(--line);
  color: var(--text);
  justify-content: flex-start;
  width: 100%;
}

@media (max-width: 900px) {
  #app {
    width: 100%;
    padding: max(16px, env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));
  }

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

  .hero,
  .result-head {
    display: block;
  }

  h1 {
    font-size: 1.72rem;
  }

  .app-brand {
    gap: 6px;
  }

  .app-brand-mark {
    width: 34px;
    height: 34px;
  }

  .app-brand-text {
    gap: 6px;
  }

  .app-brand-text h1 {
    font-size: 1.3rem;
  }

  .app-tagline {
    font-size: 0.82rem;
  }

  .status-pill {
    display: inline-block;
    margin-top: 12px;
  }

  .status-grid,
  .menu-grid,
  .metrics div,
  .meaning-grid {
    grid-template-columns: 1fr;
  }

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

  .search-row #undoSave {
    grid-column: 1 / -1;
  }

  .toolbar {
    display: grid;
    grid-template-columns: 1fr;
  }

  .panel-head {
    display: grid;
  }

  .study-actions {
    display: grid;
    grid-template-columns: 1fr;
    justify-content: stretch;
  }

  .word-prompt {
    align-items: stretch;
    display: grid;
  }

  .history-controls {
    grid-template-columns: 1fr;
  }

  .history-pager {
    justify-content: flex-start;
  }

  .vocab-filter-grid {
    grid-template-columns: 1fr;
  }

  .settings-layout,
  .menu-grid {
    grid-template-columns: 1fr;
  }

  .settings-grid label,
  .font-zoom-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .font-zoom-controls {
    grid-template-columns: 72px 1fr 72px;
  }

  .account-actions,
  .diagnostics-actions,
  .danger-actions {
    grid-template-columns: 1fr;
  }

  .danger-button {
    min-width: 0;
  }
}

/* --- Goals panel --- */
.goals-actions {
  display: flex;
  align-items: center;
}

.goals-period-tabs[hidden] {
  display: none;
}

.goals-progress {
  display: grid;
  gap: 12px;
  margin-top: 4px;
}

.goal-metric {
  display: grid;
  gap: 6px;
}

.goal-metric-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.92rem;
}

.goal-metric-head strong {
  font-variant-numeric: tabular-nums;
}

.goal-bar {
  height: 10px;
  border-radius: 999px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
  overflow: hidden;
}

.goal-bar > span {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: var(--primary);
  transition: width 0.3s ease;
}

.goal-metric.met .goal-bar > span {
  background: #009e73;
}

.goals-cta {
  margin: 8px 0 0;
}

.goals-suggestions {
  margin-top: 14px;
}

.goals-tips-title {
  margin: 0 0 6px;
  font-size: 0.95rem;
}

.goals-suggestions ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.goals-suggestions li {
  font-size: 0.92rem;
  line-height: 1.35;
}

.goals-forecast {
  margin-top: 14px;
  display: grid;
  gap: 8px;
}

.goals-forecast-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.goals-forecast-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--line);
  white-space: nowrap;
}

.goals-forecast-easy,
.goals-forecast-good {
  color: #006d4e;
  background: rgba(0, 158, 115, 0.12);
  border-color: rgba(0, 158, 115, 0.4);
}

.goals-forecast-heavy {
  color: #8a5a00;
  background: rgba(214, 137, 16, 0.12);
  border-color: rgba(214, 137, 16, 0.4);
}

.goals-forecast-too_heavy {
  color: #9b1c1c;
  background: rgba(204, 36, 36, 0.12);
  border-color: rgba(204, 36, 36, 0.4);
}

.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(96px, 1fr));
  gap: 8px;
}

.forecast-grid div {
  display: grid;
  gap: 2px;
  padding: 8px;
  border-radius: 10px;
  background: var(--panel-soft);
  border: 1px solid var(--line);
}

.forecast-grid span {
  font-size: 0.72rem;
  color: var(--muted, #6b7280);
}

.forecast-grid strong {
  font-size: 1.1rem;
  font-variant-numeric: tabular-nums;
}

.goals-forecast-warning {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.4;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(204, 36, 36, 0.08);
  border: 1px solid rgba(204, 36, 36, 0.3);
}

.goals-forecast-note {
  margin: 0;
  font-size: 0.9rem;
}

.goals-forecast-insights {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
}

.goals-forecast-insights li {
  font-size: 0.9rem;
  line-height: 1.35;
}

.goals-forecast-explainer {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.4;
  color: var(--muted, #6b7280);
}

@media (min-width: 980px) {
  #app > #appMenu,
  #app > #aiChatPanel {
    padding-inline: 0;
  }
}

/* Large desktop: keep the reading column comfortable, not stretched. */
@media (min-width: 1400px) {
  #app {
    width: min(1280px, 100%);
  }
}