/* Learner tools: conversation partner (ai/), techniques home and drills, vocabulary review.
   Tokens from app.css / kashi.css only (light + dark follow automatically); logical properties; motion tiers respected. */

/* ============================================================== shared */
.ai-label { display: inline-flex; gap: 4px; align-items: center; font-size: var(--fs-xs); color: var(--ink-2); }
.ai-label .ic { inline-size: 14px; block-size: 14px; color: var(--indigo); }
.tag.ai { background: color-mix(in srgb, var(--indigo) 12%, var(--card)); color: var(--ink); }
.tag.leech { background: color-mix(in srgb, var(--bad) 14%, var(--card)); color: var(--bad); }
.center { text-align: center; }
.play-btn.tap-me { border-color: var(--saffron); box-shadow: 0 0 0 3px color-mix(in srgb, var(--saffron) 35%, transparent); }
.chip-s { display: inline-flex; align-items: center; gap: 6px; min-block-size: var(--ctl-sm); padding-inline: 14px; border-radius: 999px; border: 1px solid var(--hair);
  background: var(--card); color: var(--ink-2); font-size: var(--fs-sm); font-weight: 600; text-decoration: none; cursor: pointer; }
.chip-s.on, .chip-s:has(input:checked) { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.chip-s input { position: absolute; opacity: 0; pointer-events: none; }
.chip-s:has(input:focus-visible) { outline: 2px solid var(--indigo); outline-offset: 2px; }
.sum-stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; margin: 0; }
.sum-stats > div { background: var(--paper-2); border-radius: var(--r-md); padding: 8px 12px; }
.sum-stats dt { font-size: var(--fs-xs); color: var(--ink-2); }
.sum-stats dd { margin: 0; font-size: var(--fs-xl); font-weight: 700; font-variant-numeric: tabular-nums; }
.sum-stats dd small { font-size: var(--fs-xs); font-weight: 600; color: var(--ink-2); }

/* ============================================================== tutor home */
.tt-tabs { margin-block: 4px 14px; }
.tt-filter { display: flex; flex-wrap: wrap; gap: 6px; margin-block-end: 14px; }
.tt-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr)); }
.tt-card { display: grid; gap: 8px; align-content: start; background: var(--card); border: 1px solid var(--hair); border-radius: var(--r-lg); padding: 16px; box-shadow: var(--e1); }
.tt-card h2 { font-size: var(--fs-md); }
.tt-card form, .tt-card > a { margin-block-start: auto; }
.tt-goals { margin: 0; padding-inline-start: 18px; color: var(--ink-2); }
.tt-level { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; border: 0; padding: 0; margin: 0; }
.tt-level legend { float: inline-start; margin-inline-end: 8px; color: var(--ink-2); }
.tt-topics { display: grid; gap: 10px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 150px), 1fr)); }
.tt-topic { display: grid; gap: 2px; justify-items: start; text-align: start; padding: 12px 14px; min-block-size: 76px; border-radius: var(--r-lg); border: 1px solid var(--hair);
  background: var(--card); color: var(--ink); font: inherit; cursor: pointer; box-shadow: 0 var(--ledge) 0 var(--hair); transition: transform 160ms var(--ease-out), border-color 160ms; }
.tt-topic .ic { inline-size: 20px; block-size: 20px; color: var(--teal); }
.tt-topic span { font-weight: 700; }
.tt-topic small { color: var(--ink-2); font-size: var(--fs-xs); }
@media (hover: hover) and (pointer: fine) { .tt-topic:hover:not(:disabled) { border-color: var(--indigo); transform: translateY(-2px); } }
.tt-topic:active:not(:disabled) { transform: translateY(1px); box-shadow: none; }
.tt-custom input { flex: 1; min-inline-size: 0; }
.tt-ielts h2 { display: flex; gap: 8px; align-items: center; font-size: var(--fs-lg); }
.tt-recent { margin-block-start: 20px; display: grid; gap: 8px; }
.tt-recent ul, .tt-history { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.tt-recent li { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 4px 12px; }
.tt-history li { display: flex; align-items: center; gap: 8px; padding: 8px 12px; }
.tt-h-main { flex: 1; display: grid; gap: 2px; text-decoration: none; color: inherit; min-inline-size: 0; }

/* ============================================================== chat */
.chat2 { display: flex; flex-direction: column; gap: 10px; min-block-size: calc(100dvh - 140px); padding-block-start: 8px; }
.chat-head { display: grid; gap: 6px; padding-block: 0 8px; border-block-end: 1px solid var(--hair); }
.chat-title { flex: 1; min-inline-size: 0; }
.chat-title h1 { font-size: var(--fs-lg); line-height: 1.45; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-title p { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 0; }
.chat-title .en { max-inline-size: 22ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.chat-prog { display: flex; gap: 10px; align-items: center; }
.chat-prog .bar { block-size: 5px; }
.chat-goals summary { cursor: pointer; color: var(--ink-2); min-block-size: 44px; display: flex; align-items: center; }
#autoplay[aria-pressed="false"] { opacity: 0.55; }
#autoplay[aria-pressed="true"] { background: transparent; color: var(--indigo); }

.chat2 .bubbles { flex: 1; display: flex; flex-direction: column; gap: 10px; padding-block: 6px; }
.msg { display: grid; gap: 6px; max-inline-size: min(88%, 560px); }
.msg.partner { align-self: flex-end; justify-items: end; }     /* RTL page: the partner sits on the left */
.msg.learner { align-self: flex-start; justify-items: start; }
.chat2 .bubble { max-inline-size: 100%; padding: 9px 14px; border-radius: 18px; line-height: 1.6; font-size: var(--fs-md); }
.chat2 .bubble p { margin: 0; text-align: left; }
.chat2 .bubble.partner { background: var(--card); border: 1px solid var(--hair); border-end-end-radius: 6px; box-shadow: var(--e1); }
.chat2 .bubble.learner { background: var(--indigo); color: var(--on-indigo); border-end-start-radius: 6px; direction: ltr; text-align: left; }
.msg.pending .bubble { opacity: 0.7; }
.msg.failed .bubble { outline: 2px dashed var(--bad); opacity: 1; }
.spoken .ic { inline-size: 14px; block-size: 14px; vertical-align: -2px; opacity: 0.8; }
.b-tools { display: flex; gap: 6px; align-items: center; justify-content: flex-end; margin-block-start: 6px; direction: rtl; }
.chat2 .bubble .play-btn { min-block-size: 32px; min-inline-size: 32px; margin: 0; padding-inline: 8px; }
.b-tr { font: inherit; font-size: var(--fs-xs); font-weight: 600; color: var(--indigo); background: none; border: 1px solid var(--hair); border-radius: 999px;
  min-block-size: 32px; padding-inline: 10px; cursor: pointer; position: relative; }
.b-tr::before { content: ""; position: absolute; inset: -6px -2px; }
.b-tr[aria-expanded="true"] { background: color-mix(in srgb, var(--indigo) 10%, var(--card)); }
.b-tr.htmx-request { opacity: 0.6; cursor: progress; }
.tr { direction: rtl; text-align: start; margin-block-start: 8px; padding-block-start: 8px; border-block-start: 1px dashed var(--hair); display: grid; gap: 4px; }
.tr-fa { margin: 0; font-size: var(--fs-base); line-height: 1.85; }
.chat2 .coach { max-inline-size: 100%; justify-self: stretch; margin: 0; }
.fix-card strong { display: inline-flex; gap: 6px; align-items: center; }
.fix-card .ic { inline-size: 16px; block-size: 16px; }
.fix, .sum-list .fix { direction: ltr; text-align: left; margin: 2px 0; }
.fix del { color: var(--bad); text-decoration-thickness: 2px; }
.fix ins { color: var(--ok); text-decoration: none; font-weight: 700; background: color-mix(in srgb, var(--ok) 12%, transparent); border-radius: 4px; padding-inline: 3px; }

.typing { display: none; }
.typing.htmx-request { display: grid; }
.typing .bubble { display: inline-flex; gap: 5px; padding: 14px 16px; }
.typing i { inline-size: 7px; block-size: 7px; border-radius: 50%; background: var(--ink-2); opacity: 0.4; animation: zs-dot 1.2s infinite ease-in-out; }
.typing i:nth-child(2) { animation-delay: 0.15s; } .typing i:nth-child(3) { animation-delay: 0.3s; }
@keyframes zs-dot { 0%, 60%, 100% { transform: translateY(0); opacity: 0.35; } 30% { transform: translateY(-4px); opacity: 0.9; } }
html[data-motion="0"] .typing i { animation: none; opacity: 0.6; }

/* #chat-end-zone (the swap target that turns the composer into the summary) must not box the composer in: a sticky
   element only moves inside its parent, and a parent exactly its own height kept it from sticking at all */
#chat-end-zone { display: contents; }
.composer-wrap { position: sticky; inset-block-end: 0; z-index: 3; display: grid; gap: 6px; padding-block: 8px; background: var(--paper);
  border-block-start: 1px solid var(--hair); }
.has-tabbar .composer-wrap { inset-block-end: calc(var(--tabbar-h) + var(--safe-b)); }
@media (min-width: 900px) { .has-tabbar .composer-wrap { inset-block-end: 0; } }
.chat2 .composer { position: static; display: flex; gap: 6px; align-items: center; padding: 0; background: none; }
.chat2 .composer input[type="text"] { flex: 1; min-inline-size: 0; min-block-size: var(--ctl); border-radius: 999px; padding-inline: 16px; direction: ltr; }
.chat2 .send-btn { min-inline-size: var(--ctl); min-block-size: var(--ctl); padding-inline: 10px; border-radius: 999px; }
.hint-btn { inline-size: auto; padding-inline: 10px; gap: 4px; border-radius: 999px; border: 1px solid var(--hair); color: var(--indigo); display: inline-flex; align-items: center; }
.hint-btn span { font-size: var(--fs-xs); font-weight: 600; }
@media (max-width: 420px) { .hint-btn span { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); } .hint-btn { padding-inline: 0; } }
.mic-btn.on { background: var(--bad); color: #fff; animation: zs-pulse 1.4s infinite; }
.mic-btn[aria-busy="true"] { opacity: 0.6; }
@keyframes zs-pulse { 0%, 100% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--bad) 45%, transparent); } 50% { box-shadow: 0 0 0 8px transparent; } }
html[data-motion="0"] .mic-btn.on { animation: none; }
.rec-status { margin: 0; }
.chat-foot { gap: 8px; }
.hints:empty { display: none; }
.hints.htmx-request::after { content: "…"; color: var(--ink-2); }
.hint-box { display: grid; gap: 6px; padding: 8px 10px; max-block-size: 42dvh; overflow-y: auto; overscroll-behavior: contain; border-radius: var(--r-md); background: color-mix(in srgb, var(--indigo) 6%, var(--card)); border: 1px solid var(--hair); }
.hint-box p { margin: 0; }
.suggs { display: grid; gap: 6px; }
.sugg { font: inherit; font-size: var(--fs-sm); line-height: 1.5; text-align: left; padding: 6px 10px; min-block-size: 40px; border-radius: var(--r-md); border: 1px solid var(--hair); background: var(--card); color: var(--ink); cursor: pointer; }
@media (hover: hover) and (pointer: fine) { .sugg:hover { border-color: var(--indigo); } }
.hint-close { justify-self: start; }

.summary { display: grid; gap: 12px; padding: 18px; }
.summary h2 { display: flex; gap: 8px; align-items: center; font-size: var(--fs-lg); }
.summary h3 { display: flex; gap: 6px; align-items: center; font-size: var(--fs-md); margin-block-start: 4px; }
.summary h3 .ic, .summary h2 .ic { color: var(--teal); }
.sum-list { margin: 0; padding-inline-start: 18px; display: grid; gap: 8px; }
.sum-phrases { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.sum-phrases li { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 6px 10px; padding: 8px 12px; border-radius: var(--r-md); background: var(--paper-2); }

/* ============================================================== techniques home */
.tech-today { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; padding: 16px 18px; margin-block-end: 12px;
  border-radius: var(--r-xl); background: linear-gradient(160deg, color-mix(in srgb, var(--teal) 12%, var(--card)), var(--card) 70%); border: 1px solid var(--hair); box-shadow: var(--e1); }
.tt-main { display: flex; gap: 14px; align-items: flex-start; min-inline-size: 0; flex: 1 1 260px; }
.tt-ic { display: grid; place-items: center; flex: none; inline-size: 48px; block-size: 48px; border-radius: var(--r-md); background: var(--teal); color: var(--paper); }
.tt-ic .ic { inline-size: 24px; block-size: 24px; }
.tt-kicker { margin: 0; color: var(--teal); font-weight: 700; }
.tech-today h2 { font-size: var(--fs-lg); }
.tech-today p { margin: 0; }
.tt-for { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.tech-week { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px; margin: 0 0 16px; }
.tech-week > div { background: var(--card); border: 1px solid var(--hair); border-radius: var(--r-md); padding: 8px 12px; }
.tech-week dt { font-size: var(--fs-xs); color: var(--ink-2); }
.tech-week dd { margin: 0; font-size: var(--fs-xl); font-weight: 700; font-variant-numeric: tabular-nums; }
.tech-week dd small { font-size: var(--fs-xs); color: var(--ink-2); font-weight: 600; }
.tech-grid { display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 280px), 1fr)); }
.tech-card2 { display: grid; gap: 8px; grid-template-rows: auto auto 1fr auto auto; background: var(--card); border: 1px solid var(--hair); border-radius: var(--r-lg); padding: 16px; box-shadow: var(--e1); }
.tech-card2.picked { border-color: var(--teal); box-shadow: 0 0 0 2px color-mix(in srgb, var(--teal) 30%, transparent); }
.tech-card2 header { display: flex; gap: 10px; align-items: center; }
.tech-card2 h3 { font-size: var(--fs-md); }
.tech-card2 p { margin: 0; }
.tc-ic { display: grid; place-items: center; inline-size: 36px; block-size: 36px; border-radius: var(--r-sm); background: var(--paper-2); color: var(--teal); flex: none; }
.tc-for { display: flex; flex-wrap: wrap; gap: 4px; }
.tc-why summary { cursor: pointer; color: var(--ink-2); min-block-size: 44px; display: flex; align-items: center; }
.tech-card2 footer { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; }

/* drills */
.shadow-line { cursor: default; }
.shadow-line .w { border-radius: 4px; transition: background-color 120ms; }
#line .w { cursor: pointer; }
.shadow-line .spk { font-family: var(--f-body); }
.shadow-line.your-turn { border-color: var(--saffron); box-shadow: 0 0 0 3px color-mix(in srgb, var(--saffron) 30%, transparent); }
.rwl-text .rl { cursor: pointer; border-radius: 4px; }
.rwl-text .rl.now { background: color-mix(in srgb, var(--indigo) 8%, transparent); }
.rwl-text .spk { color: var(--teal); font-size: var(--fs-sm); }
html[data-motion="0"] .shadow-line .w { transition: none; }

/* ============================================================== vocabulary review */
.rv-head { display: flex; flex-wrap: wrap; gap: 8px 12px; align-items: center; justify-content: space-between; margin-block-end: 10px; }
.rv-head h1 { font-size: var(--fs-h1); }
.rv-settings { position: relative; }
.rv-settings > summary { list-style: none; max-inline-size: 70vw; }
.rv-settings > summary::-webkit-details-marker { display: none; }
.rv-settings > summary span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rv-settings[open] > form { position: absolute; inset-inline-end: 0; inset-block-start: calc(100% + 6px); z-index: 5; inline-size: min(92vw, 520px); padding: 16px; box-shadow: var(--shadow); }
.rv-modes { border: 0; padding: 0; margin: 0; display: grid; gap: 6px; }
.rv-opt { display: flex; gap: 8px; align-items: center; min-block-size: 40px; padding-inline: 10px; border-radius: var(--r-md); border: 1px solid var(--hair); cursor: pointer; }
.rv-opt:has(input:checked) { border-color: var(--indigo); background: color-mix(in srgb, var(--indigo) 6%, var(--card)); }
.rv-top { display: grid; gap: 8px; margin-block-end: 12px; }
.rv-goal { display: flex; gap: 10px; align-items: center; }
.rv-goal .bar { block-size: 8px; }
.rv-goal .bar.met > i { background: var(--ok); }
.rv-goal b { font-variant-numeric: tabular-nums; font-size: var(--fs-sm); }
.rv-top .rvstats { justify-content: flex-start; margin: 0; }
.rvstats .leech-n { color: var(--bad); }
.rv-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.rv-actions:empty { display: none; }
.rv2 .rv-ask { margin: 0; color: var(--teal); font-weight: 700; }
.rv2 .ipa { font-family: var(--f-body); font-weight: 400; direction: ltr; unicode-bidi: isolate; }
.rv-type { display: flex; gap: 8px; justify-self: stretch; max-inline-size: 440px; margin-inline: auto; inline-size: 100%; }
.rv-type input { flex: 1; min-inline-size: 0; min-block-size: var(--ctl-lg); font-size: var(--fs-lg); text-align: center; direction: ltr; }
.rv-listen .play-btn.big { min-block-size: 72px; padding-inline: 22px; border-radius: 999px; }
.rv-choices { display: grid; gap: 8px; grid-template-columns: repeat(2, minmax(0, 1fr)); justify-self: stretch; }
@media (max-width: 420px) { .rv-choices { grid-template-columns: 1fr; } }
.rv-choice { font: inherit; display: flex; gap: 10px; align-items: center; text-align: start; min-block-size: 52px; padding: 8px 12px; border-radius: var(--r-lg);
  border: 1px solid var(--line); background: var(--card); color: var(--ink); cursor: pointer; box-shadow: 0 var(--ledge) 0 var(--hair); }
@media (hover: hover) and (pointer: fine) { .rv-choice:hover:not(:disabled) { border-color: var(--indigo); } }
.rv-choice kbd { font-size: var(--fs-2xs); border: 1px solid var(--hair); border-radius: var(--r-xs); padding: 0 5px; color: var(--ink-2); }
.rv-cloze { font-size: var(--fs-lg); line-height: 1.8; max-inline-size: 36ch; margin: 0; }
.rv-cloze .blank { display: inline-block; min-inline-size: 4ch; letter-spacing: 0.08em; color: var(--indigo); font-weight: 700; }
.rv-verdict { justify-self: stretch; display: flex; flex-wrap: wrap; gap: 4px 10px; align-items: center; justify-content: center; padding: 8px 12px; border-radius: var(--r-md); }
.rv-verdict.ok { background: color-mix(in srgb, var(--ok) 12%, var(--card)); color: var(--ok); }
.rv-verdict.close, .rv-verdict.form { background: color-mix(in srgb, var(--saffron) 20%, var(--card)); }
.rv-verdict.wrong { background: color-mix(in srgb, var(--bad) 10%, var(--card)); color: var(--bad); }
.rv-verdict .small { color: var(--ink); }
.rv-ex { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: center; }
.rv-mn { justify-self: stretch; display: grid; gap: 6px; text-align: start; padding: 10px 12px; border-radius: var(--r-md); border: 1px dashed color-mix(in srgb, var(--bad) 40%, var(--hair)); }
.rv-mn input { flex: 1; min-inline-size: 0; }
.rvcard .rate.suggest { outline: 2px solid var(--indigo); outline-offset: 2px; }
.rvcard[data-stage="back"] { touch-action: pan-y; transition: transform 180ms var(--ease-out); }
.rvcard.swipe-good { box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 50%, transparent); }
.rvcard.swipe-again { box-shadow: 0 0 0 3px color-mix(in srgb, var(--bad) 45%, transparent); }
html[data-motion="0"] .rvcard[data-stage="back"] { transition: none; }
.rvdone { display: grid; gap: 12px; text-align: start; }
.rvdone h2 { display: flex; gap: 8px; align-items: center; justify-content: center; }
.rv-again { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.rv-again li { padding: 4px 10px; border-radius: 999px; background: var(--paper-2); font-size: var(--fs-sm); }
.rv-week { margin-block-start: 18px; display: grid; gap: 6px; }
.rv-week h2 { font-weight: 700; }
.rv-bars { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 6px; align-items: end; block-size: 100px; }
.rv-bars li { display: grid; grid-template-rows: 1fr auto auto; justify-items: center; gap: 2px; block-size: 100%; }
.rv-bars i { align-self: end; inline-size: 100%; max-inline-size: 30px; block-size: calc(var(--h, 0) * 56px + 3px); border-radius: 6px 6px 2px 2px; background: var(--teal-deco); }
.rv-bars i.met { background: var(--ok); }
.rv-bars span { font-size: var(--fs-2xs); color: var(--ink-2); }
.sum-phrases li > .en { text-align: left; flex: 1 1 12ch; }
.rwl-text .rl:has(> .spk) { display: block; margin-block-start: 4px; }  /* a dialogue: each turn on its own line */
.rv-bars small { font-size: var(--fs-2xs); color: var(--ink-2); line-height: 1; }
.rv-note p { margin: 0; text-align: start; }
/* the rating row stays in reach on a phone while the answer card scrolls */
@media (max-width: 700px) {
  .rvcard[data-stage="back"] { overflow: visible; }
  .rvcard[data-stage="back"]::before { border-start-start-radius: inherit; border-start-end-radius: inherit; }
  .rvcard[data-stage="back"] .rates { position: sticky; inset-block-end: calc(var(--tabbar-h) + var(--safe-b) + 10px); z-index: 2; padding: 8px;
    margin-inline: -8px; border-radius: var(--r-lg); background: color-mix(in srgb, var(--card) 94%, transparent); box-shadow: var(--e2); }
}

/* touch: the 32px play button inside a chat bubble gets an invisible 44px hit area; recent-chat links reach 44px */
.bubble .play-btn { position: relative; }
@media (pointer: coarse) {
  .bubble .play-btn::after { content: ""; position: absolute; inset: -6px; }
  .tt-recent li > a, .tt-recent a.small { display: inline-flex; align-items: center; min-block-size: 44px; }
}