/* Shared components in the Engbit design language ("precision instrument"):
   hairlines instead of boxes, one accent for the current/active state, ink
   primary actions, monospace caps labels, thin display figures. Pages only add
   layout. Every value comes from the theme tokens. */

/* ---- buttons ------------------------------------------------------------------------- */
.btn {
  height: var(--control-height);
  padding: 0 14px;
  border: 0;
  border-radius: var(--radius-control);
  background: var(--color-surface);
  box-shadow: inset 0 0 0 1px var(--color-line-input);
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: var(--font-control);
  font-weight: var(--weight-regular);
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--duration) var(--ease), box-shadow var(--duration) var(--ease), color var(--duration) var(--ease);
}
.btn:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); }
.btn:focus-visible, .icon-btn:focus-visible, .chip:focus-visible, .tool-chip:focus-visible { outline: var(--outline-focus); outline-offset: 2px; }
.btn:disabled { cursor: not-allowed; opacity: .5; }
.btn > svg { width: 15px; height: 15px; stroke-width: 1.6; }
.btn-block { width: 100%; }
.btn-small { height: 30px; padding: 0 11px; font-size: 12.5px; border-radius: var(--radius-small); }
.btn-small > svg { width: 14px; height: 14px; }

.btn-primary { background: var(--button-primary-bg); color: var(--button-primary-text); box-shadow: var(--button-primary-shadow); }
.btn-primary:hover { background: var(--button-primary-bg-hover); color: var(--button-primary-text); box-shadow: var(--button-primary-shadow); }
.btn-outline { color: var(--button-primary-text); box-shadow: inset 0 0 0 1px var(--color-primary-line); }
.btn-outline:hover { background: var(--color-primary-faint); box-shadow: inset 0 0 0 1px var(--color-primary-line); }
.btn-soft { background: var(--color-surface); color: var(--color-text-secondary); }
.btn-soft:hover { color: var(--color-text); }
.btn-danger { color: var(--color-danger); }
.btn-danger:hover { background: var(--color-danger-soft); box-shadow: inset 0 0 0 1px var(--color-danger); }

.link-button { padding: 0; border: 0; background: transparent; color: var(--color-primary); font-size: inherit; font-weight: var(--weight-regular); cursor: pointer; }
.link-button:hover { color: var(--color-primary-strong); }
.link-btn { padding: 2px 0; border: 0; background: none; color: var(--color-text-muted); cursor: pointer; }
.link-btn:hover { color: var(--color-primary); }

/* interface language switch */
.language-toggle { min-width: 38px; height: 30px; padding: 0 10px; border: 0; border-radius: var(--radius-small); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); display: flex; align-items: center; justify-content: center; color: var(--color-text-secondary); font-family: var(--font-mono); font-size: max(11px, var(--cjk-min, 0px)); cursor: pointer; }
.language-toggle:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); color: var(--color-text); }

/* icon button */
.icon-btn { width: 34px; height: 34px; flex: none; border: 0; border-radius: var(--radius-control); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); display: grid; place-items: center; color: var(--color-text-secondary); cursor: pointer; transition: box-shadow var(--duration) var(--ease), color var(--duration) var(--ease); }
.icon-btn:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); color: var(--color-text); }
.icon-btn[aria-pressed="true"], .icon-btn.active { background: var(--color-primary-faint); box-shadow: inset 0 0 0 1px var(--color-primary-line); color: var(--color-primary); }
.icon-btn > svg { width: 15px; height: 15px; stroke-width: 1.6; }
.icon-btn-plain { width: 28px; height: 28px; box-shadow: none; background: transparent; }

/* ---- form controls ---------------------------------------------------------------------- */
.select { height: var(--control-height); min-width: 0; padding: 0 30px 0 12px; border: 0; border-radius: var(--radius-control); background-color: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text); font-size: var(--font-control); cursor: pointer; }
.select:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); }
.select:focus { box-shadow: inset 0 0 0 1px var(--color-primary), var(--shadow-focus); outline: none; }

.field { margin-bottom: 18px; }
.field > label { display: block; margin-bottom: 8px; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); font-weight: var(--weight-regular); }
.field-row { display: flex; align-items: flex-end; gap: var(--space-3); margin-bottom: 18px; }
.field-row > .field { flex: 1; margin-bottom: 0; }
.field-row > .btn { flex: 0 0 140px; height: var(--input-height); }

.input-wrap { position: relative; }
.input { width: 100%; height: var(--input-height); padding: 0 42px 0 12px; border: 0; border-radius: var(--radius-control); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text); font-size: var(--font-body); outline: none; transition: box-shadow var(--duration) var(--ease); }
textarea.input { height: auto; padding: 10px 12px; line-height: 1.6; resize: vertical; }
.input::placeholder { color: var(--color-text-faint); }
.input:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); }
.input:focus { box-shadow: inset 0 0 0 1px var(--color-primary), var(--shadow-focus); }
.input.invalid { box-shadow: inset 0 0 0 1px var(--color-danger-field), var(--shadow-focus-danger); }
.input.with-icon { padding-left: 38px; }
.input-icon-leading { position: absolute; left: 12px; top: 50%; width: 16px; height: 16px; transform: translateY(-50%); color: var(--color-icon); pointer-events: none; }
.input-action { position: absolute; right: 6px; top: 50%; width: 30px; height: 30px; transform: translateY(-50%); display: grid; place-items: center; border: 0; border-radius: var(--radius-small); background: transparent; color: var(--color-text-muted); cursor: pointer; }
.input-action:hover { background: var(--color-line-soft); color: var(--color-text); }
.input-action > svg { width: 16px; height: 16px; }

.field-error { display: none; margin-top: 6px; color: var(--color-danger-field); font-size: var(--font-caption); line-height: 1.4; }
.field-error.show { display: block; }
.field-help { margin: 6px 0 0; color: var(--color-text-muted); font-size: var(--font-caption); line-height: 1.5; }

.check { display: inline-flex; align-items: center; gap: var(--space-2); cursor: pointer; font-size: var(--font-control); color: var(--color-text-secondary); }
.check > input { width: 15px; height: 15px; margin: 0; accent-color: var(--color-text); }

.search-field { display: inline-flex; align-items: center; gap: 8px; height: var(--control-height); padding: 0 12px; border-radius: var(--radius-control); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text-faint); transition: box-shadow var(--duration) var(--ease); }
.search-field:focus-within { box-shadow: inset 0 0 0 1px var(--color-primary), var(--shadow-focus); }
.search-field svg { width: 14px; height: 14px; }
.search-field input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--color-text); font: inherit; font-size: var(--font-control); }

.switch { appearance: none; position: relative; width: 30px; height: 18px; margin: 0; flex: none; border-radius: 9px; background: var(--color-track); cursor: pointer; transition: background var(--duration) var(--ease); }
.switch::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: var(--color-surface); box-shadow: var(--shadow-panel); transition: left var(--duration) var(--ease); }
.switch:checked { background: var(--color-primary); }
.switch:checked::after { left: 14px; }

/* inline status message: a hairline line with a status dot */
.notice { display: none; position: relative; margin: 0 0 16px; padding: 10px 12px 10px 28px; border-radius: var(--radius-control); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line); color: var(--color-text-secondary); font-size: var(--font-control); line-height: 1.5; }
.notice::before { content: ""; position: absolute; left: 13px; top: 17px; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); }
.notice.show { display: block; }
.notice.error { color: var(--color-danger-strong); box-shadow: inset 0 0 0 1px var(--color-danger-soft); }
.notice.error::before { background: var(--color-danger); }

/* ---- surfaces -------------------------------------------------------------------------- */
.panel { border: 0; border-radius: var(--radius-panel); background: var(--color-surface); box-shadow: var(--shadow-panel); }
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-4); }
.panel-head h2, .panel-head h3 { margin: 0; font-size: var(--font-heading-3); font-weight: var(--weight-heading); }
.panel-head a { color: var(--color-primary); font-size: var(--font-caption); }
.side-card { padding: var(--panel-pad); }
.side-card h3 { display: flex; align-items: baseline; justify-content: space-between; gap: var(--space-2); margin: 0 0 var(--space-4); font-size: var(--font-heading-3); font-weight: var(--weight-heading); }
.side-card h3 small { font-family: var(--font-mono); color: var(--color-text-faint); font-size: max(10.5px, var(--cjk-min, 0px)); font-weight: var(--weight-regular); }
.muted { color: var(--color-text-muted); }

.divider-text { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 14px; margin: 22px 0; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-faint); }
.divider-text::before, .divider-text::after { content: ""; height: 1px; background: var(--color-line); }

/* icon tile: a neutral hairline square (no tint) */
.icon-tile { width: 40px; height: 40px; flex: none; border-radius: var(--radius-control); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line); color: var(--color-text-secondary); display: grid; place-items: center; }
.icon-tile > svg { width: 18px; height: 18px; stroke-width: 1.5; }
.icon-tile-small { width: 32px; height: 32px; }
.icon-tile-small > svg { width: 15px; height: 15px; }

/* page header */
.page-head { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: var(--space-4); margin-bottom: 28px; }
.page-head h1 { margin: 0 0 6px; font-size: 28px; line-height: 1.2; font-weight: 300; letter-spacing: -.025em; }
.page-head p { margin: 0; color: var(--color-text-muted); font-size: var(--font-control); }
.page-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

/* empty / placeholder state */
.empty-state { max-width: 520px; margin: 10vh auto 0; padding: var(--space-8); text-align: center; }
.empty-state-icon { width: 44px; height: 44px; margin: 0 auto var(--space-4); border-radius: var(--radius-control); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text-muted); display: grid; place-items: center; }
.empty-state-icon > svg { width: 18px; height: 18px; }
.empty-state h1 { margin: 0 0 var(--space-2); font-size: 18px; font-weight: var(--weight-heading); }
.empty-state p { margin: 0; color: var(--color-text-muted); line-height: 1.7; }

/* ---- navigation inside pages ------------------------------------------------------------ */
.tabs { display: flex; gap: var(--space-5); margin: 0 0 22px; border-bottom: 1px solid var(--color-line); overflow-x: auto; scrollbar-width: none; }
.tab { position: relative; height: 40px; padding: 0; border: 0; background: none; cursor: pointer; display: inline-flex; align-items: center; gap: 7px; color: var(--color-text-muted); font-size: var(--font-control); white-space: nowrap; }
.tab > svg { width: 14px; height: 14px; stroke-width: 1.6; }
.tab:hover { color: var(--color-text); }
.tab.active { color: var(--color-text); }
.tab.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--color-text); }
.tab-badge { font-family: var(--font-mono); font-size: max(10.5px, var(--cjk-min, 0px)); color: var(--color-danger); }

.segmented { display: inline-flex; gap: 2px; padding: 2px; border-radius: var(--radius-control); background: var(--color-line-soft); box-shadow: inset 0 0 0 1px var(--color-line); }
.segmented > button { height: 28px; padding: 0 12px; border: 0; border-radius: 6px; background: transparent; display: inline-flex; align-items: center; gap: 6px; color: var(--color-text-muted); font-size: 12.5px; white-space: nowrap; cursor: pointer; transition: background var(--duration) var(--ease), color var(--duration) var(--ease); }
.segmented > button:hover { color: var(--color-text); }
.segmented > button > svg { width: 13px; height: 13px; }
.segmented > button.active { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-panel); }

/* ---- small data ------------------------------------------------------------------------- */
.chip { display: inline-flex; align-items: center; gap: 5px; min-height: 24px; padding: 2px 8px; border: 0; border-radius: var(--radius-small); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text-secondary); font-size: 12px; white-space: nowrap; }
.chip > svg { width: 12px; height: 12px; }
button.chip { cursor: pointer; }
button.chip:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); color: var(--color-text); }
.chip-warning { color: var(--color-warning-strong); box-shadow: inset 0 0 0 1px var(--color-warning-soft); background: var(--color-warning-soft); }
.chip-danger, .chip.red { color: var(--color-danger); box-shadow: inset 0 0 0 1px var(--color-danger-soft); background: var(--color-danger-soft); }
.chip-success { color: var(--color-success); box-shadow: inset 0 0 0 1px var(--color-success-soft); background: var(--color-success-soft); }
.chip-text { color: var(--color-primary); font-size: var(--font-caption); white-space: nowrap; }

.tag { display: inline-flex; align-items: center; gap: 5px; height: 22px; padding: 0 7px; border-radius: 4px; background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); font-family: var(--font-mono); font-size: max(10.5px, var(--cjk-min, 0px)); white-space: nowrap; color: var(--color-text-secondary); }
.tag svg { width: 11px; height: 11px; }
.tag-predict { color: var(--color-primary); box-shadow: inset 0 0 0 1px var(--color-primary-line); }
.tag-hot { color: var(--color-danger); box-shadow: inset 0 0 0 1px var(--color-danger-soft); }
.tag-done { color: var(--color-success); box-shadow: inset 0 0 0 1px var(--color-success-soft); }
.tag-wrong { color: var(--color-danger-strong); box-shadow: inset 0 0 0 1px var(--color-danger-soft); }

.stat-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--color-line); border-radius: var(--radius-card); overflow: hidden; box-shadow: 0 0 0 1px var(--color-line); }
.stat { padding: 14px 16px; background: var(--color-surface); }
.stat > span { display: block; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); }
.stat > b { display: block; margin-top: 8px; font-size: 24px; font-weight: 300; letter-spacing: -.02em; }
.progress-bar { height: 2px; border-radius: 1px; background: var(--color-track); overflow: hidden; }
.progress-bar > span { display: block; width: 0; height: 100%; background: var(--color-primary); transition: width .3s var(--ease); }

.key { display: inline-grid; place-items: center; min-width: 20px; height: 20px; margin-right: 3px; padding: 0 5px; border-radius: 4px; background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input), 0 1px 0 var(--color-line-input); font-family: var(--font-mono); font-size: max(10px, var(--cjk-min, 0px)); line-height: 1; color: var(--color-text-secondary); text-transform: none; letter-spacing: 0; }
.key > svg { width: 10px; height: 10px; stroke-width: 2; }
.btn .key { margin: 0 0 0 4px; background: transparent; box-shadow: inset 0 0 0 1px currentColor; color: inherit; opacity: .6; }

.word-link { padding: 0; border: 0; background: transparent; color: inherit; font: inherit; cursor: pointer; }
.word-link:hover { color: var(--color-primary); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 4px; }
.lookup-meaning { white-space: pre-line; }

.exam-report-button { height: 28px; padding: 0 10px; font-family: var(--font-mono); font-size: max(11px, var(--cjk-min, 0px)); color: var(--color-text-secondary); }
.exam-report-button.active { color: var(--color-primary); box-shadow: inset 0 0 0 1px var(--color-primary-line); }
.exam-report-button > svg { width: 13px; height: 13px; }
.exam-sep { width: 1px; height: 12px; background: var(--color-line-input); }
.exam-report-button b { font-weight: var(--weight-regular); }

/* precision corner marks around a framed element */
.frame { position: relative; }
.frame > .c { position: absolute; width: 9px; height: 9px; border: 0 solid var(--color-line-input-hover); pointer-events: none; }
.frame > .c.tl { top: -6px; left: -6px; border-top-width: 1px; border-left-width: 1px; }
.frame > .c.tr { top: -6px; right: -6px; border-top-width: 1px; border-right-width: 1px; }
.frame > .c.bl { bottom: -6px; left: -6px; border-bottom-width: 1px; border-left-width: 1px; }
.frame > .c.br { bottom: -6px; right: -6px; border-bottom-width: 1px; border-right-width: 1px; }

/* ---- overlays ----------------------------------------------------------------------------- */
.dialog-backdrop[hidden], .menu[hidden], .toast-host:empty { display: none; }
.dialog-backdrop { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: var(--space-4); background: var(--color-overlay); backdrop-filter: blur(2px); }
.dialog { width: min(460px, 100%); max-height: calc(100vh - 32px); overflow: auto; border-radius: var(--radius-panel); background: var(--color-surface); box-shadow: var(--shadow-floating); padding: var(--space-6); }
.dialog-narrow { width: min(340px, 100%); }
.dialog-wide { width: min(760px, 100%); }
.dialog-header { display: flex; justify-content: space-between; align-items: flex-start; gap: var(--space-4); margin-bottom: 20px; }
.dialog-header h2 { margin: 0; font-size: 17px; font-weight: var(--weight-heading); letter-spacing: -.01em; }
.dialog-header p { margin: 6px 0 0; color: var(--color-text-muted); font-size: var(--font-control); }
.dialog-close { width: 28px; height: 28px; flex: none; border: 0; border-radius: var(--radius-small); background: transparent; display: grid; place-items: center; color: var(--color-text-muted); cursor: pointer; }
.dialog-close:hover { background: var(--color-line-soft); color: var(--color-text); }
.dialog-close > svg { width: 16px; height: 16px; }
.dialog-actions { display: flex; justify-content: flex-end; gap: var(--space-2); margin-top: var(--space-6); }

.menu { position: absolute; z-index: 70; min-width: 220px; border-radius: var(--radius-card); background: var(--color-surface); box-shadow: var(--shadow-floating); padding: 5px; }
.menu-header { padding: 9px 10px; margin-bottom: 4px; border-bottom: 1px solid var(--color-line-soft); }
.menu-header strong { display: block; font-size: var(--font-control); font-weight: var(--weight-heading); }
.menu-header span { display: block; color: var(--color-text-muted); font-size: var(--font-caption); overflow: hidden; text-overflow: ellipsis; }
.menu-item { width: 100%; min-height: 32px; padding: 0 10px; border: 0; border-radius: var(--radius-small); background: transparent; display: flex; align-items: center; gap: 10px; color: var(--color-text-secondary); font-size: var(--font-control); text-align: left; cursor: pointer; }
.menu-item:hover { background: var(--color-line-soft); color: var(--color-text); }
.menu-item > svg { width: 14px; height: 14px; stroke-width: 1.6; }

.toast-host { position: fixed; z-index: 120; left: 50%; bottom: 84px; transform: translateX(-50%); display: grid; gap: var(--space-2); }
.toast { padding: 9px 14px; border-radius: var(--radius-control); background: var(--color-surface); color: var(--color-text); font-size: var(--font-control); box-shadow: var(--shadow-floating); }
.toast.error { background: var(--color-danger-soft); color: var(--color-danger-strong); }

.avatar-editor { display: flex; align-items: center; gap: var(--space-3); }
.avatar-editor .avatar { width: 48px; height: 48px; }

/* ---- trainer pages (RA list, SST / WE / DI memorize) ------------------------------------- */
/* page header in instrument form: label, thin title, readouts and a 2px progress line */
.trainer-hero { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: var(--space-6) var(--space-8); padding: 0 0 28px; margin-bottom: 32px; border-bottom: 1px solid var(--color-line); }
.trainer-hero-copy { min-width: 0; }
.trainer-hero h1 { margin: 12px 0 6px; font-size: 30px; font-weight: 300; letter-spacing: -.03em; line-height: 1.15; color: var(--color-text); }
.trainer-hero p { margin: 0; color: var(--color-text-muted); font-size: var(--font-control); }
.trainer-eyebrow { display: inline-flex; align-items: center; gap: 6px; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); }
.trainer-eyebrow svg { display: none; }
.hero-stats { display: flex; flex-wrap: wrap; gap: var(--space-8); }
.hero-stat { display: grid; gap: 6px; }
.hero-stat b { order: 2; font-size: 28px; font-weight: 300; letter-spacing: -.03em; color: var(--color-text); line-height: 1; }
.hero-stat span { order: 1; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); white-space: nowrap; }
.hero-progress { display: grid; gap: 8px; width: min(420px, 100%); margin-top: var(--space-5); }
.hero-progress-bar { height: 2px; border-radius: 1px; background: var(--color-track); overflow: hidden; }
.hero-progress-bar > i { display: block; height: 100%; background: var(--color-primary); transition: width var(--duration) var(--ease); }
.hero-progress small { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: max(10.5px, var(--cjk-min, 0px)); color: var(--color-text-muted); }

/* question navigator: compact mono cells */
.nav-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(30px, 1fr)); gap: 4px; max-height: 300px; overflow-y: auto; padding: 2px; scrollbar-width: thin; }
.nav-cell { display: grid; place-items: center; height: 26px; border: 0; border-radius: 4px; background: var(--color-line-soft); color: var(--color-text-muted); font-family: var(--font-mono); font-size: max(10.5px, var(--cjk-min, 0px)); cursor: pointer; transition: background var(--duration) var(--ease), color var(--duration) var(--ease); }
.nav-cell:hover { color: var(--color-text); box-shadow: inset 0 0 0 1px var(--color-line-input-hover); }
.nav-cell.is-done { background: var(--color-text-faint); color: var(--color-surface); }
.nav-cell.is-learning { background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-text-faint); color: var(--color-text-secondary); }
.nav-cell.is-wrong { background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-danger); color: var(--color-danger); }
.nav-cell.is-current { background: var(--color-primary); color: var(--color-on-primary); box-shadow: 0 0 0 3px var(--color-primary-soft); }
.nav-cell.is-dim { opacity: .45; }
.nav-legend { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: var(--space-3); color: var(--color-text-muted); font-size: max(11px, var(--cjk-min, 0px)); }
.nav-legend span::before { content: ""; display: inline-block; width: 7px; height: 7px; margin-right: 6px; border-radius: 2px; background: var(--color-line-soft); box-shadow: inset 0 0 0 1px var(--color-line-input); vertical-align: 1px; }
.nav-legend .lg-done::before { background: var(--color-text-faint); box-shadow: none; }
.nav-legend .lg-wrong::before { background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-danger); }
.nav-legend .lg-learning::before { background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-text-faint); }
.nav-legend .lg-current::before { background: var(--color-primary); box-shadow: none; }

.trainer-layout { display: grid; grid-template-columns: minmax(0, 1fr) var(--aside-width); gap: 32px; align-items: start; }
.trainer-main { display: grid; gap: var(--page-gap); min-width: 0; }
.trainer-aside { display: grid; gap: var(--page-gap); position: sticky; top: calc(var(--shell-top) + var(--page-gutter)); min-width: 0; }
@media (max-width: 1180px) {
  .trainer-layout { grid-template-columns: minmax(0, 1fr); }
  .trainer-aside { position: static; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
}
@media (max-width: 760px) {
  .hero-stats { gap: var(--space-5); }
  .hero-stat b { font-size: 22px; }
  .trainer-hero h1 { font-size: 24px; }
}

/* ---- local grammar check (Harper) under writing scores ------------------------------------ */
.grammar-panel { display: grid; gap: var(--space-3); margin-top: var(--space-3); padding: var(--space-4); border-radius: var(--radius-card); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line); }
.grammar-panel h4 { display: flex; align-items: center; gap: 8px; margin: 0; font-size: var(--font-heading-3); font-weight: var(--weight-heading); }
.grammar-panel h4 svg { width: 15px; height: 15px; color: var(--color-text-muted); }
.grammar-loading, .grammar-clean { display: flex; align-items: center; gap: 8px; margin: 0; font-size: var(--font-control); color: var(--color-text-muted); }
.grammar-loading svg { width: 14px; height: 14px; animation: spin 1s linear infinite; }
.grammar-clean { color: var(--color-success); }
.grammar-clean svg { width: 14px; height: 14px; }
@keyframes spin { to { transform: rotate(360deg); } }
.grammar-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.grammar-list li { display: grid; gap: 4px; padding: 12px 0; border-top: 1px solid var(--color-line-soft); font-size: var(--font-control); }
.grammar-kind { justify-self: start; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); }
.kind-spelling, .kind-grammar { color: var(--color-danger); }
.kind-punctuation, .kind-capitalization { color: var(--color-warning-strong); }
.kind-usage, .kind-style, .kind-repetition { color: var(--color-primary); }
.grammar-context { margin: 0; color: var(--color-text-secondary); line-height: 1.6; }
.grammar-context mark { padding: 0 2px; border-radius: 3px; background: var(--color-danger-soft); color: var(--color-danger-strong); }
.grammar-fix { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 0; color: var(--color-text-muted); }
.grammar-fix svg { width: 13px; height: 13px; color: var(--color-success); }
.grammar-fix code { padding: 1px 6px; border-radius: 4px; background: var(--color-success-soft); color: var(--color-success); font-family: var(--font-mono); font-size: 12px; }

/* ---- brand logo (all layouts) -------------------------------------------------------------- */
.brand-logo { display: inline-flex; align-items: center; gap: 7px; color: var(--color-brand-ink); font-family: var(--font-sans); font-size: 17px; font-weight: 500; letter-spacing: -.035em; line-height: 1; }
.brand-mark { width: 1.3em; height: 1.3em; flex: none; color: var(--color-brand-ink); }
.brand-bit { fill: var(--color-brand-bit); }
.brand-i { position: relative; display: inline-block; }
.brand-i > i { position: absolute; left: 50%; top: -.05em; width: .18em; height: .18em; transform: translateX(-50%); border-radius: .04em; background: var(--color-brand-bit); }

/* ---- header tools: page controls shown in the app header ------------------------------------ */
.tool-tabs { display: flex; align-self: stretch; gap: var(--space-5); margin-right: auto; }
.tool-tab { position: relative; padding: 0; border: 0; background: none; color: var(--color-text-muted); font-size: var(--font-control); cursor: pointer; }
.tool-tab:hover, .tool-tab.active { color: var(--color-text); }
.tool-tab.active::after { content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px; background: var(--color-text); }
.tool-stats { display: flex; align-items: baseline; gap: var(--space-5); white-space: nowrap; }
.tool-stat { display: inline-flex; align-items: baseline; gap: 6px; font-size: max(11px, var(--cjk-min, 0px)); color: var(--color-text-muted); }
.tool-stat b { color: var(--color-text); font-weight: var(--weight-regular); font-size: max(11.5px, var(--cjk-min, 0px)); }
.tool-stat .label { font-size: max(10px, var(--cjk-min, 0px)); }
.tool-chip { display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px; border: 0; border-radius: var(--radius-small); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text-secondary); font-family: var(--font-mono); font-size: max(11px, var(--cjk-min, 0px)); cursor: pointer; white-space: nowrap; }
.tool-chip:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); color: var(--color-text); }
.tool-chip > svg { width: 11px; height: 11px; }
.tool-status { display: inline-flex; align-items: center; gap: 8px; font-size: max(10.5px, var(--cjk-min, 0px)); color: var(--color-text-muted); white-space: nowrap; }
.live-dot { position: relative; width: 6px; height: 6px; flex: none; border-radius: 50%; background: var(--color-primary); }
.live-dot::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1px solid var(--color-primary); opacity: 0; animation: live-ping 2.4s cubic-bezier(0, 0, .2, 1) infinite; }
@keyframes live-ping { 0% { transform: scale(.4); opacity: .7; } 100% { transform: scale(1.4); opacity: 0; } }
@media (prefers-reduced-motion: reduce) { .live-dot::after { animation: none; } }

/* ---- shared section heading: "01 — Title" ------------------------------------------------- */
.section-title { display: flex; align-items: baseline; gap: 10px; margin: 0 0 18px; font-size: var(--font-heading-2); font-weight: var(--weight-heading); letter-spacing: -.01em; }
.section-title > .label { padding-left: 22px; background: linear-gradient(var(--color-primary), var(--color-primary)) left center / 14px 1px no-repeat; }

/* ---- tables -------------------------------------------------------------------------------- */
.table-scroll { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; font-size: var(--font-control); }
.data-table th { padding: 0 12px 10px; border-bottom: 1px solid var(--color-line-input); text-align: left; font-family: var(--font-label); font-size: max(var(--label-size), var(--cjk-min, 0px)); letter-spacing: var(--label-tracking); text-transform: var(--label-transform); color: var(--color-text-muted); font-weight: var(--weight-regular); white-space: nowrap; }
.data-table td { padding: 12px; border-bottom: 1px solid var(--color-line-soft); vertical-align: middle; }
.data-table tr:hover td { background: var(--color-surface-subtle); }

/* small filter / action chip button */
.chip-button { height: 28px; min-width: 52px; padding: 0 10px; border: 0; border-radius: var(--radius-small); background: var(--color-surface); box-shadow: inset 0 0 0 1px var(--color-line-input); color: var(--color-text-secondary); font-family: var(--font-mono); font-size: max(11px, var(--cjk-min, 0px)); letter-spacing: 0; text-transform: none; cursor: pointer; display: inline-flex; align-items: center; justify-content: center; gap: 6px; }
.chip-button:hover { box-shadow: inset 0 0 0 1px var(--color-line-input-hover); color: var(--color-text); }
.chip-button > svg { width: 13px; height: 13px; }
.chip-button.active { background: var(--button-primary-bg); color: var(--button-primary-text); box-shadow: var(--button-primary-shadow); }
.tool-chip.active, .tool-chip[aria-checked="true"] { color: var(--color-primary); background: var(--color-primary-faint); box-shadow: inset 0 0 0 1px var(--color-primary-line); }
.tool-chip[hidden] { display: none; }
.select-quiet { height: 28px; padding: 0 26px 0 10px; font-size: var(--font-control); }

/* ---- no white blocks: content sits on the page, separated by hairlines (controls keep their fill) ---- */
.panel { border-radius: 0; background: none; box-shadow: none; }
.notice { border-radius: 0; background: none; box-shadow: inset 0 1px 0 var(--color-line), inset 0 -1px 0 var(--color-line); }
.grammar-panel { padding: var(--space-4) 0 0; border-radius: 0; background: none; box-shadow: none; border-top: 1px solid var(--color-line); }
.stat-grid { gap: 0 24px; border-radius: 0; background: none; box-shadow: none; overflow: visible; }
.stat-grid > .stat { padding: 12px 0; background: none; border-top: 1px solid var(--color-line); }

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