/* ==========================================================================
   English Practice AI - design system
   ========================================================================== */

:root {
  /* surfaces */
  --bg: #07070c;
  --bg-elev: #0c0c14;
  --surface: #101019;
  --surface-2: #161623;
  --surface-3: #1d1d2e;
  --input: #0b0b13;

  /* lines */
  --line: rgba(255, 255, 255, 0.07);
  --line-strong: rgba(255, 255, 255, 0.13);

  /* text */
  --text: #ecedf5;
  --text-2: #a2a3bd;
  --text-3: #6b6c87;

  /* brand */
  --accent: #7c5cff;
  --accent-2: #22d3ee;
  --accent-ink: #b7a6ff;
  --accent-soft: rgba(124, 92, 255, 0.14);
  --accent-line: rgba(124, 92, 255, 0.32);

  /* semantic */
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #fb7185;

  /* shape */
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 6px 18px rgba(0, 0, 0, 0.32);
  --ring: 0 0 0 3px rgba(124, 92, 255, 0.28);

  --sidebar-w: 268px;
  --topbar-h: 76px;
}

* {
  box-sizing: border-box;
}

/* must win over the display values set on .view, .list, .form, .loading, ... */
[hidden] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(900px 500px at 12% -8%, rgba(124, 92, 255, 0.16), transparent 62%),
    radial-gradient(760px 480px at 96% 4%, rgba(34, 211, 238, 0.1), transparent 60%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

h1, h2, h3 {
  margin: 0;
  letter-spacing: -0.018em;
  line-height: 1.2;
}

p {
  margin: 0;
}

.icon-sprite {
  display: none;
}

.icon {
  width: 18px;
  height: 18px;
  flex: none;
  fill: currentColor;
}

/* ==========================================================================
   Shell
   ========================================================================== */

.app-shell {
  display: flex;
  min-height: 100vh;
}

/* --- sidebar --- */

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 40;
  width: var(--sidebar-w);
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 20px 16px;
  background: rgba(10, 10, 18, 0.86);
  backdrop-filter: blur(18px);
  border-right: 1px solid var(--line);
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 4px 6px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #4d7dff 55%, var(--accent-2));
  color: #fff;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 8px 20px rgba(124, 92, 255, 0.32);
}

.brand-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.brand-text strong {
  font-size: 0.95rem;
  font-weight: 600;
}

.brand-text small {
  font-size: 0.74rem;
  color: var(--text-3);
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 3px;
  flex: 1;
  overflow-y: auto;
  margin: 0 -4px;
  padding: 0 4px;
}

.nav-label {
  margin: 14px 0 6px;
  padding: 0 12px;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text-3);
}

.nav-label:first-child {
  margin-top: 0;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 10px 12px;
  border-radius: var(--r-sm);
  color: var(--text-2);
  font-size: 0.9rem;
  font-weight: 500;
  transition: background 140ms ease, color 140ms ease;
}

.nav-item .icon {
  opacity: 0.72;
}

.nav-item:hover {
  background: var(--surface-2);
  color: var(--text);
}

.nav-item.is-active {
  background: var(--accent-soft);
  color: #fff;
}

.nav-item.is-active .icon {
  opacity: 1;
  color: var(--accent-ink);
}

.nav-item.is-active::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 18px;
  border-radius: 3px;
  background: var(--accent);
}

.nav-count {
  margin-left: auto;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--surface-3);
  color: var(--text-2);
  font-size: 0.72rem;
  font-style: normal;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.nav-item.is-active .nav-count {
  background: rgba(124, 92, 255, 0.3);
  color: #fff;
}

.sidebar-foot {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-item-quiet {
  font-size: 0.85rem;
  color: var(--text-3);
}

.stack-card {
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--surface);
}

.stack-row {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-2);
}

.stack-meta {
  display: grid;
  gap: 6px;
  margin: 12px 0 0;
}

.stack-meta > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.stack-meta dt {
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}

.stack-meta dd {
  margin: 0;
  max-width: 62%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.74rem;
  color: var(--text-2);
}

.dot {
  width: 8px;
  height: 8px;
  flex: none;
  border-radius: 999px;
  background: var(--text-3);
}

.dot[data-state="ok"] {
  background: var(--ok);
  box-shadow: 0 0 0 4px rgba(52, 211, 153, 0.14);
}

.dot[data-state="idle"] {
  background: var(--warn);
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.13);
}

.dot[data-state="error"] {
  background: var(--danger);
  box-shadow: 0 0 0 4px rgba(251, 113, 133, 0.14);
}

.sidebar-close {
  display: none;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 35;
  background: rgba(4, 4, 8, 0.6);
  backdrop-filter: blur(2px);
}

/* --- main --- */

.main {
  flex: 1;
  min-width: 0;
  margin-left: var(--sidebar-w);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: var(--topbar-h);
  padding: 14px 28px;
  background: rgba(7, 7, 12, 0.72);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

.topbar-title {
  min-width: 0;
  flex: 1;
}

.topbar-title h1 {
  font-size: 1.28rem;
  font-weight: 600;
}

.topbar-title p {
  margin-top: 3px;
  font-size: 0.84rem;
  color: var(--text-3);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.79rem;
  color: var(--text-2);
  white-space: nowrap;
}

.content {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: min(1280px, 100%);
  margin: 0 auto;
  padding: 28px;
}

.view {
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: view-in 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes view-in {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

/* ==========================================================================
   Cards & layout blocks
   ========================================================================== */

.card {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  box-shadow: var(--shadow-sm);
}

.card-accent {
  border-color: var(--accent-line);
  background:
    radial-gradient(420px 200px at 100% 0%, rgba(124, 92, 255, 0.16), transparent 70%),
    linear-gradient(180deg, var(--surface-2), var(--surface));
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.card-head h2 {
  font-size: 1.04rem;
  font-weight: 600;
}

.card-head p {
  margin-top: 5px;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--text-3);
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 9px;
  padding: 5px 11px;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.kicker .icon {
  width: 13px;
  height: 13px;
}

.split {
  display: grid;
  gap: 20px;
}

.split-wide {
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  align-items: start;
}

.split-form {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: start;
}

/* --- stat cards --- */

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

.stat-card {
  position: relative;
  overflow: hidden;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, var(--surface-2), var(--surface));
  transition: border-color 160ms ease, transform 160ms ease;
}

.stat-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.stat-icon {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 14px;
  border-radius: 11px;
  background: var(--surface-3);
  color: var(--text-2);
}

.stat-icon[data-tone="violet"] { background: rgba(124, 92, 255, 0.16); color: #b6a4ff; }
.stat-icon[data-tone="cyan"]   { background: rgba(34, 211, 238, 0.14); color: #67e3f5; }
.stat-icon[data-tone="green"]  { background: rgba(52, 211, 153, 0.14); color: #6ee7b7; }
.stat-icon[data-tone="amber"]  { background: rgba(251, 191, 36, 0.14); color: #fcd34d; }

.stat-label {
  display: block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-3);
}

.stat-value {
  display: block;
  margin: 4px 0 6px;
  font-size: 1.9rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  font-variant-numeric: tabular-nums;
}

.stat-hint {
  font-size: 0.78rem;
  color: var(--text-3);
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  background: none;
  color: var(--text);
  font: inherit;
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: transform 130ms ease, background 130ms ease, border-color 130ms ease, box-shadow 130ms ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #5b7cff);
  color: #fff;
  box-shadow: 0 10px 24px rgba(96, 78, 255, 0.28);
}

.btn-primary:hover {
  box-shadow: 0 12px 30px rgba(96, 78, 255, 0.42);
}

.btn-ghost {
  border-color: var(--line-strong);
  background: var(--surface-2);
  color: var(--text-2);
}

.btn-ghost:hover {
  background: var(--surface-3);
  color: var(--text);
}

.btn-quiet {
  color: var(--text-3);
}

.btn-quiet:hover {
  color: var(--danger);
}

.btn-sm {
  min-height: 34px;
  padding: 0 12px;
  font-size: 0.81rem;
}

.btn-block {
  width: 100%;
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text-2);
  cursor: pointer;
}

.icon-btn:hover {
  color: var(--text);
  border-color: var(--line-strong);
}

.menu-btn {
  display: none;
}

/* ==========================================================================
   Forms
   ========================================================================== */

.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-inline {
  flex-direction: row;
  align-items: flex-end;
  flex-wrap: wrap;
}

.form-inline .field {
  flex: 1;
  min-width: 200px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
}

.field-narrow {
  flex: 0 0 130px !important;
  min-width: 110px !important;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field label {
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--text-3);
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  min-height: 44px;
  padding: 11px 13px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: var(--input);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  transition: border-color 130ms ease, box-shadow 130ms ease;
}

input::placeholder {
  color: var(--text-3);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: var(--ring);
}

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--text-3) 50%), linear-gradient(135deg, var(--text-3) 50%, transparent 50%);
  background-position: calc(100% - 18px) 50%, calc(100% - 13px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
  cursor: pointer;
}

select option {
  background: var(--surface-2);
  color: var(--text);
}

textarea {
  min-height: 96px;
  line-height: 1.6;
  resize: vertical;
}

.hint {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--text-3);
}

.hint[data-tone="ok"] { color: var(--ok); }
.hint[data-tone="error"] { color: var(--danger); }
.hint[data-tone="busy"] { color: var(--accent-ink); }

/* --- dropzone --- */

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 30px 20px;
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--r-md);
  background: var(--input);
  text-align: center;
  cursor: pointer;
  transition: border-color 140ms ease, background 140ms ease;
}

.dropzone:hover,
.dropzone.is-dragging {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.dropzone strong {
  font-size: 0.92rem;
  font-weight: 600;
}

.dropzone span {
  font-size: 0.79rem;
  color: var(--text-3);
}

.dropzone-icon {
  width: 26px;
  height: 26px;
  margin-bottom: 4px;
  color: var(--accent-ink);
}

.file-chips {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.file-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  font-size: 0.84rem;
}

.file-chip .icon {
  color: var(--accent-ink);
}

.file-chip b {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 500;
}

.file-chip small {
  margin-left: auto;
  flex: none;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

/* --- picker (checkbox list) --- */

.picker {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 190px;
  overflow-y: auto;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--input);
}

.picker-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 9px 11px;
  border-radius: 8px;
  cursor: pointer;
  transition: background 130ms ease;
}

.picker-item:hover {
  background: var(--surface-2);
}

.picker-item input {
  margin-top: 2px;
  accent-color: var(--accent);
  width: 15px;
  height: 15px;
  flex: none;
}

.picker-item div {
  min-width: 0;
}

.picker-item strong {
  display: block;
  font-size: 0.85rem;
  font-weight: 500;
}

.picker-item span {
  display: block;
  margin-top: 2px;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.71rem;
  color: var(--text-3);
  word-break: break-all;
}

/* --- switch --- */

.switch {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 0.88rem;
  color: var(--text-2);
  cursor: pointer;
}

.switch input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.switch-track {
  position: relative;
  width: 40px;
  height: 23px;
  flex: none;
  border-radius: 999px;
  background: var(--surface-3);
  border: 1px solid var(--line-strong);
  transition: background 150ms ease, border-color 150ms ease;
}

.switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 17px;
  height: 17px;
  border-radius: 999px;
  background: var(--text-3);
  transition: transform 170ms cubic-bezier(0.22, 1, 0.36, 1), background 150ms ease;
}

.switch input:checked + .switch-track {
  background: var(--accent);
  border-color: var(--accent);
}

.switch input:checked + .switch-track .switch-thumb {
  transform: translateX(17px);
  background: #fff;
}

.switch input:focus-visible + .switch-track {
  box-shadow: var(--ring);
}

/* ==========================================================================
   Lists & data display
   ========================================================================== */

.list {
  display: flex;
  flex-direction: column;
}

.list-scroll {
  max-height: 520px;
  overflow-y: auto;
  margin-right: -8px;
  padding-right: 8px;
}

.item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}

.item:first-child {
  border-top: none;
  padding-top: 2px;
}

.item-icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  flex: none;
  border-radius: 9px;
  background: var(--surface-3);
  color: var(--text-2);
}

.item-body {
  min-width: 0;
  flex: 1;
}

.item-title {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  font-weight: 550;
}

.item-meta {
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--text-3);
}

.item-preview {
  margin-top: 6px;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--text-2);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.item-action {
  flex: none;
  align-self: center;
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.74rem;
  color: var(--text-3);
  word-break: break-all;
}

button.mono {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: 100%;
  margin-top: 6px;
  padding: 3px 8px 3px 7px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  text-align: left;
  transition: border-color 130ms ease, color 130ms ease;
}

button.mono:hover {
  border-color: var(--accent-line);
  color: var(--accent-ink);
}

button.mono:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

button.mono .icon {
  width: 12px;
  height: 12px;
  flex: none;
  opacity: 0.7;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 9px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-3);
  color: var(--text-2);
  font-size: 0.72rem;
  font-weight: 600;
  white-space: nowrap;
}

.badge[data-level="beginner"]     { background: rgba(52, 211, 153, 0.14); border-color: rgba(52, 211, 153, 0.3); color: #6ee7b7; }
.badge[data-level="elementary"]   { background: rgba(34, 211, 238, 0.14); border-color: rgba(34, 211, 238, 0.3); color: #67e3f5; }
.badge[data-level="intermediate"] { background: rgba(251, 191, 36, 0.14); border-color: rgba(251, 191, 36, 0.3); color: #fcd34d; }
.badge[data-level="advanced"]     { background: rgba(124, 92, 255, 0.18); border-color: var(--accent-line); color: #b6a4ff; }

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 12px;
}

.chips span {
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.75rem;
  font-weight: 500;
}

.chips-action {
  margin-top: 9px;
  gap: 6px;
}

.chips-action button {
  padding: 5px 11px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--text-3);
  font: inherit;
  font-size: 0.74rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 130ms ease, color 130ms ease, background 130ms ease;
}

.chips-action button:hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-ink);
}

.chips-action button:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

.spec-list {
  display: grid;
  gap: 0;
  margin: 0;
}

.spec-list > div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.spec-list > div:first-child {
  border-top: none;
  padding-top: 0;
}

.spec-list dt {
  font-size: 0.82rem;
  color: var(--text-3);
}

.spec-list dd {
  margin: 0;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.8rem;
  color: var(--text);
  text-align: right;
  word-break: break-all;
}

.meter {
  display: grid;
  gap: 0;
  margin-bottom: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--input);
  padding: 4px 14px;
}

.meter-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.meter-row:first-child {
  border-top: none;
}

.meter-row span {
  font-size: 0.8rem;
  color: var(--text-3);
}

.meter-row strong {
  font-size: 0.86rem;
  font-weight: 600;
  text-align: right;
  word-break: break-word;
}

.subhead {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 20px 0 4px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}

.note {
  margin-top: 14px;
  padding: 13px 15px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: var(--r-sm);
  background: var(--input);
}

.note span {
  display: block;
  margin-bottom: 5px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
}

.note p {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--text-2);
}

.preview-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 4px;
}

.preview-meta > div {
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--input);
}

.preview-meta span {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--text-3);
}

.preview-meta strong {
  display: block;
  margin-top: 5px;
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: capitalize;
}

.preview-card {
  border-color: var(--accent-line);
  box-shadow: var(--shadow);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

/* --- steps --- */

.steps {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.steps li {
  position: relative;
  display: flex;
  gap: 14px;
  padding: 0 0 22px;
}

.steps li:last-child {
  padding-bottom: 0;
}

.steps li::after {
  content: "";
  position: absolute;
  left: 14px;
  top: 30px;
  bottom: 2px;
  width: 1px;
  background: var(--line-strong);
}

.steps li:last-child::after {
  display: none;
}

.steps li > span {
  display: grid;
  place-items: center;
  width: 29px;
  height: 29px;
  flex: none;
  border-radius: 999px;
  border: 1px solid var(--accent-line);
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.78rem;
  font-weight: 600;
}

.steps strong {
  font-size: 0.9rem;
  font-weight: 600;
}

.steps p {
  margin-top: 3px;
  font-size: 0.83rem;
  color: var(--text-3);
}

/* --- timeline --- */

.timeline {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.timeline-item {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--input);
}

.timeline-week {
  display: inline-flex;
  padding: 3px 9px;
  margin-bottom: 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-ink);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.timeline-item h3 {
  font-size: 0.94rem;
  font-weight: 600;
  text-transform: capitalize;
}

.timeline-item p {
  margin-top: 6px;
  font-size: 0.83rem;
  line-height: 1.55;
  color: var(--text-3);
}

/* --- voices --- */

.voice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 14px;
}

.voice-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--input);
  transition: border-color 150ms ease, transform 150ms ease;
}

.voice-card:hover {
  border-color: var(--accent-line);
  transform: translateY(-2px);
}

.voice-card h3 {
  font-size: 0.94rem;
  font-weight: 600;
}

.voice-card p {
  margin-top: 7px;
  font-size: 0.83rem;
  line-height: 1.55;
  color: var(--text-3);
}

.voice-card .mono {
  display: block;
  margin-top: 10px;
}

/* --- quiz --- */

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

.quiz-item {
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--input);
}

.quiz-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.quiz-head .badge {
  margin-left: auto;
  align-self: flex-start;
}

.quiz-prompt {
  white-space: pre-line;
}

.quiz-num {
  flex: none;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  color: var(--accent-ink);
}

.quiz-prompt {
  font-size: 0.92rem;
  line-height: 1.55;
  font-weight: 500;
}

.quiz-options {
  display: grid;
  gap: 6px;
  margin: 13px 0 0;
  padding: 0;
  list-style: none;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  width: 100%;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 0.84rem;
  line-height: 1.5;
  text-align: left;
  transition: border-color 130ms ease, background 130ms ease, color 130ms ease;
}

.quiz-option b {
  flex: none;
  font-family: "JetBrains Mono", ui-monospace, monospace;
  color: var(--text-3);
}

.quiz-option:not([disabled]) {
  cursor: pointer;
}

.quiz-option:not([disabled]):hover {
  border-color: var(--accent-line);
  background: var(--accent-soft);
  color: var(--text);
}

.quiz-option:focus-visible {
  outline: none;
  box-shadow: var(--ring);
}

.quiz-option[disabled] {
  cursor: default;
}

.quiz-option.is-correct {
  border-color: rgba(52, 211, 153, 0.42);
  background: rgba(52, 211, 153, 0.1);
  color: #a7f3d0;
}

.quiz-option.is-correct b {
  color: var(--ok);
}

.quiz-option.is-wrong {
  border-color: rgba(251, 113, 133, 0.42);
  background: rgba(251, 113, 133, 0.1);
  color: #fecdd3;
}

.quiz-option.is-wrong b {
  color: var(--danger);
}

.quiz-option .mark {
  margin-left: auto;
  flex: none;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.quiz-explain {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-3);
}

.quiz-explain b {
  color: var(--text-2);
}

.quiz-item.is-answered {
  border-color: var(--line-strong);
}

/* --- quiz toolbar / practice bar --- */

.quiz-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.quiz-toolbar select {
  max-width: 280px;
  min-height: 38px;
  padding-top: 8px;
  padding-bottom: 8px;
  font-size: 0.85rem;
}

.quiz-toolbar .badge {
  margin-left: auto;
}

.segmented {
  display: inline-flex;
  flex: none;
  gap: 3px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--input);
}

.segmented button {
  padding: 7px 14px;
  border: none;
  border-radius: 7px;
  background: transparent;
  color: var(--text-3);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 130ms ease, color 130ms ease;
}

.segmented button:hover {
  color: var(--text-2);
}

.segmented button.is-active {
  background: var(--surface-3);
  color: var(--text);
}

.practice-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
  padding: 12px 15px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--input);
}

.progress {
  flex: 1;
  height: 6px;
  border-radius: 999px;
  background: var(--surface-3);
  overflow: hidden;
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 320ms cubic-bezier(0.22, 1, 0.36, 1);
}

.practice-bar strong {
  flex: none;
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
}

/* --- answer block --- */

.answer {
  margin-top: 16px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--input);
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--text-2);
}

.answer h3 {
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--text);
}

.answer .mono {
  display: block;
  margin-top: 10px;
}

/* ==========================================================================
   Empty / loading states
   ========================================================================== */

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 9px;
  padding: 34px 16px;
  text-align: center;
  color: var(--text-3);
}

.empty .icon {
  width: 26px;
  height: 26px;
  opacity: 0.45;
}

.empty p {
  font-size: 0.85rem;
  max-width: 34ch;
  line-height: 1.55;
}

.loading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 15px 17px;
  border: 1px solid var(--accent-line);
  border-radius: var(--r-md);
  background: var(--accent-soft);
  font-size: 0.86rem;
  color: var(--text-2);
}

.spinner {
  width: 17px;
  height: 17px;
  flex: none;
  border: 2px solid rgba(124, 92, 255, 0.25);
  border-top-color: var(--accent);
  border-radius: 999px;
  animation: spin 0.75s linear infinite;
}

.btn .spinner {
  border-color: rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.skeleton {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 6px 0;
}

.skeleton-row {
  height: 46px;
  border-radius: var(--r-sm);
  background: linear-gradient(90deg, var(--surface-2) 25%, var(--surface-3) 50%, var(--surface-2) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.3s ease-in-out infinite;
}

@keyframes shimmer {
  from { background-position: 200% 0; }
  to { background-position: -200% 0; }
}

/* ==========================================================================
   Toasts
   ========================================================================== */

.toasts {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: min(360px, calc(100vw - 40px));
}

.toast {
  display: flex;
  align-items: flex-start;
  gap: 11px;
  padding: 13px 15px;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-md);
  background: rgba(22, 22, 35, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
  font-size: 0.86rem;
  line-height: 1.5;
  color: var(--text-2);
  animation: toast-in 260ms cubic-bezier(0.22, 1, 0.36, 1);
}

.toast.is-leaving {
  animation: toast-out 200ms ease forwards;
}

.toast .icon {
  margin-top: 1px;
}

.toast[data-type="success"] { border-color: rgba(52, 211, 153, 0.4); }
.toast[data-type="success"] .icon { color: var(--ok); }
.toast[data-type="error"] { border-color: rgba(251, 113, 133, 0.4); }
.toast[data-type="error"] .icon { color: var(--danger); }
.toast[data-type="info"] .icon { color: var(--accent-ink); }

@keyframes toast-in {
  from { opacity: 0; transform: translateX(20px) scale(0.97); }
  to { opacity: 1; transform: none; }
}

@keyframes toast-out {
  to { opacity: 0; transform: translateX(20px); }
}

/* ==========================================================================
   Scrollbars
   ========================================================================== */

* {
  scrollbar-width: thin;
  scrollbar-color: var(--surface-3) transparent;
}

::-webkit-scrollbar {
  width: 9px;
  height: 9px;
}

::-webkit-scrollbar-thumb {
  border: 2px solid transparent;
  background-clip: padding-box;
  background-color: var(--surface-3);
  border-radius: 999px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: #2c2c45;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1180px) {
  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 240ms cubic-bezier(0.22, 1, 0.36, 1);
  }

  .sidebar.is-open {
    transform: none;
    box-shadow: var(--shadow);
  }

  .sidebar-close {
    display: grid;
  }

  .menu-btn {
    display: grid;
  }

  .main {
    margin-left: 0;
  }

  .topbar {
    padding: 12px 18px;
  }

  .content {
    padding: 18px;
  }
}

@media (max-width: 620px) {
  .topbar-actions .pill {
    display: none;
  }

  .topbar-actions .btn span {
    display: none;
  }

  .topbar-actions .btn {
    padding: 0 12px;
  }

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

  .field-row,
  .preview-meta {
    grid-template-columns: minmax(0, 1fr);
  }

  .form-inline {
    flex-direction: column;
    align-items: stretch;
  }

  .field-narrow {
    flex: 1 !important;
  }

  .card {
    padding: 18px;
  }

  .card-head {
    flex-direction: column;
    gap: 12px;
  }

  .actions .btn {
    flex: 1;
  }

  .quiz-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .quiz-toolbar select {
    max-width: none;
  }

  .quiz-toolbar .badge {
    margin-left: 0;
    align-self: flex-start;
  }

  .segmented {
    display: flex;
  }

  .segmented button {
    flex: 1;
  }

  .practice-bar {
    flex-wrap: wrap;
  }

  .progress {
    flex-basis: 100%;
  }
}

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