/* Learner app. Tokens in /tokens.css; TTW Action/Surface skin in ttw_shared.css. */
*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; height: 100%; }
body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 16px; line-height: 1.5; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
a { color: var(--primary); }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.mono { font-family: var(--mono); font-size: 13px; letter-spacing: 0.02em; }
.muted { color: var(--text-2); }
.small { font-size: 13px; }
.center { text-align: center; }
.italic { font-style: italic; }
.accent { color: var(--accent); }
.ok { color: var(--ok); } .bad { color: var(--bad); } .warn { color: var(--warn); }
.h1 { font-size: clamp(26px, 3.5vw, 36px); font-weight: 700; line-height: 1.15; letter-spacing: -0.01em; }
.h2 { font-size: 22px; font-weight: 700; line-height: 1.2; }
.h3 { font-size: 18px; font-weight: 600; line-height: 1.3; }
.big { font-size: 40px; font-weight: 700; line-height: 1; }
.eyebrow { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-2); font-weight: 500; }
.lede { font-size: 18px; max-width: 60ch; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.row-between.wrap { flex-wrap: wrap; }
.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.actions.center { justify-content: center; }
.actions.two { display: grid; grid-template-columns: 1fr 1fr; }
.link-btn { background: none; border: 0; padding: 0; color: var(--primary); font-weight: 500; cursor: pointer; text-align: left; }
.link-btn:hover { text-decoration: underline; }
.form-error { background: var(--bad-bg); color: var(--bad); border: 1px solid #f3c5c0; border-radius: var(--radius); padding: 10px 12px; font-size: 14px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-soft); padding: clamp(18px, 2.5vw, 28px); display: flex; flex-direction: column; gap: 14px; }
.card.row-between { flex-direction: row; }
.pill { display: inline-flex; align-items: center; gap: 6px; padding: 6px 12px; border-radius: 999px; background: var(--surface-2); font-size: 14px; }
.avatar { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; flex: none; }
.avatar.sm { width: 32px; height: 32px; font-size: 14px; }
.avatar.me { background: var(--primary-soft); color: var(--primary); }
.icon-btn { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); color: var(--text); }
.icon-btn:hover { background: var(--surface-2); }
.icon-btn.primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.icon-btn.primary:hover { background: var(--primary-hover); }
.icon-btn[aria-pressed="true"] { background: var(--primary-soft); border-color: var(--primary); color: var(--primary); }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
input[type="text"], input[type="search"], input[type="number"], select, textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--border-strong); border-radius: var(--radius); background: var(--surface); font-size: 16px; }
textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--primary); outline-offset: -1px; border-color: var(--primary); }
.ttw_action.soft.ttw_action_danger { background: var(--bad-bg); color: var(--bad); border-color: #f3c5c0; }
.ttw_action.soft.ttw_action_danger:hover:not(:disabled) { background: #fbdcd8; color: var(--bad); }
.ttw_action .icon { width: 18px; height: 18px; }
.fb-highlight { outline: 2px solid var(--primary) !important; outline-offset: 3px; border-radius: 6px; }
.toast { position: fixed; bottom: 88px; left: 50%; transform: translateX(-50%); z-index: 60; max-width: calc(100vw - 32px); padding: 10px 16px; border-radius: var(--radius); background: var(--text); color: #fff; font-size: 14px; }

/* ---------- shell ---------- */
#app { display: grid; grid-template-columns: 280px 1fr; min-height: 100vh; }
.nav { position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 24px; padding: 20px 20px 24px; background: var(--surface); border-right: 1px solid var(--border); }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font-weight: 700; font-size: 20px; }
.brand .mark { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--primary); color: #fff; font-size: 18px; }
.nav-links { display: flex; flex-direction: column; gap: 4px; }
.nav-links a { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 0 14px; border-radius: var(--radius); color: var(--text-2); text-decoration: none; font-weight: 500; font-size: 17px; }
.nav-links a:hover { background: var(--surface-2); color: var(--text); }
.nav-links a[aria-current="page"] { background: var(--primary-soft); color: var(--primary); }
.nav-user { margin-top: auto; display: flex; align-items: center; gap: 12px; padding-top: 20px; border-top: 1px solid var(--border); }
.nav-user .avatar { background: var(--surface-2); color: var(--text); }
.nav-user-text { display: flex; flex-direction: column; min-width: 0; }
.tabs { display: none; }
#main { min-width: 0; }
body.in-session #app, body.onboarding #app { grid-template-columns: minmax(0, 1fr); }
body.in-session .fab { display: none; }
body.in-session .nav, body.onboarding .nav, body.onboarding .tabs { display: none !important; }
.view[hidden] { display: none !important; }
.page { padding: clamp(20px, 4vw, 48px) clamp(16px, 4vw, 48px) 96px; display: flex; flex-direction: column; gap: 24px; max-width: 1240px; }
.page.narrow { max-width: 760px; }
.page-head { display: flex; flex-direction: column; gap: 8px; }
.grid-2 { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.col { display: flex; flex-direction: column; gap: 24px; min-width: 0; }
.rows li { display: flex; align-items: center; gap: 12px; min-height: 48px; padding: 8px 0; border-top: 1px solid var(--border); }
.rows li:first-child { border-top: 0; }
.rows a { color: inherit; text-decoration: none; display: flex; align-items: center; gap: 12px; flex: 1; min-width: 0; }
.rows .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.levels { display: flex; flex-direction: column; gap: 10px; }
.levels li { display: grid; grid-template-columns: 90px 1fr auto; align-items: center; gap: 12px; }
.bar { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
.cefr { font-family: var(--mono); font-size: 12px; padding: 3px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); min-width: 36px; text-align: center; }
.cefr.guess { opacity: 0.6; }
.plan-steps { display: flex; flex-direction: column; gap: 8px; }
.plan-steps li { display: flex; align-items: flex-start; gap: 12px; min-height: 44px; padding: 10px 14px; border-radius: var(--radius); background: var(--surface-2); border: 1px solid transparent; }
.plan-steps li .n { display: grid; place-items: center; width: 24px; height: 24px; border-radius: 50%; background: var(--surface); border: 1px solid var(--border); font-size: 12px; font-weight: 600; flex: none; }
.plan-steps li.done { color: var(--text-2); }
.plan-steps li.done .n { background: var(--ok-bg); border-color: var(--ok-bg); color: var(--ok); }
.plan-steps li.done .t { text-decoration: line-through; }
.plan-steps li.now { background: var(--accent-soft); border-color: #b9d8e3; }
.plan-steps li.now .n { background: var(--accent); border-color: var(--accent); color: #fff; }
.plan-steps li .sub { display: block; font-size: 13px; }
.plan-steps.compact li { padding: 8px 12px; font-size: 15px; }
.streak { flex-direction: row; align-items: center; gap: 14px; }
.streak .icon { width: 28px; height: 28px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { display: inline-flex; align-items: center; gap: 6px; min-height: 36px; padding: 6px 12px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); font-size: 14px; }
.chip.accent-chip { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.chip button { display: grid; place-items: center; width: 24px; height: 24px; border: 0; background: none; color: inherit; padding: 0; }
.chip-btn { min-height: 40px; padding: 8px 12px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 14px; font-weight: 500; }
.chip-btn:hover { background: var(--surface-2); }
.chip-btn[aria-pressed="true"] { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.filters button { min-height: 40px; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); font-size: 14px; }
.filters button[aria-pressed="true"] { background: var(--surface-2); border-color: var(--border-strong); font-weight: 600; }
.status { font-size: 13px; padding: 3px 10px; border-radius: 999px; }
.status.new { background: var(--accent-soft); color: var(--accent); }
.status.learning { background: var(--primary-soft); color: var(--primary); }
.status.known { background: var(--ok-bg); color: var(--ok); }
.switch-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 44px; }
.switch-row input[type="checkbox"] { appearance: none; width: 44px; height: 26px; border-radius: 13px; background: var(--border-strong); position: relative; flex: none; margin: 0; cursor: pointer; }
.switch-row input[type="checkbox"]::after { content: ""; position: absolute; top: 3px; left: 3px; width: 20px; height: 20px; border-radius: 50%; background: #fff; transition: left 150ms; }
.switch-row input[type="checkbox"]:checked { background: var(--accent); }
.switch-row input[type="checkbox"]:checked::after { left: 21px; }
.form { gap: 18px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 14px; font-weight: 500; }
.form .two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form .switch-row { flex-direction: row; font-weight: 400; }
.form fieldset { border: 0; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.form legend { font-size: 14px; font-weight: 500; margin-bottom: 6px; }
.radio-row { display: flex !important; flex-direction: row !important; align-items: center; gap: 12px; min-height: 48px; padding: 10px 14px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); font-weight: 400 !important; cursor: pointer; }
.radio-row input { width: 18px; height: 18px; margin: 0; accent-color: var(--primary); flex: none; }
.radio-row:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); }
.fab { position: fixed; right: 24px; bottom: 24px; z-index: 40; display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 18px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface); box-shadow: 0 4px 16px rgb(31 29 26 / 12%); font-weight: 600; }
.fab:hover { background: var(--surface-2); }

/* ---------- onboarding ---------- */
.onboarding { max-width: 560px; margin: 0 auto; padding: 20px 16px 120px; display: flex; flex-direction: column; gap: 16px; }
.ob-head { display: flex; align-items: center; justify-content: space-between; }
.ob-progress { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.ob-progress i { height: 4px; border-radius: 2px; background: var(--border); }
.ob-progress i.on { background: var(--primary); }
.ob-chat { display: flex; flex-direction: column; gap: 14px; }
.ob-row { display: flex; gap: 10px; align-items: flex-start; }
.bubble { background: var(--surface); border: 1px solid var(--border); border-radius: 16px 16px 16px 4px; padding: 14px 16px; font-size: 17px; max-width: 42ch; }
.ob-answer { padding-left: 42px; }
.ob-answer.chips { display: flex; }
.ob-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.lang-card { position: relative; display: flex; flex-direction: column; gap: 2px; min-height: 96px; padding: 14px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); cursor: pointer; }
.lang-card input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.lang-card strong { font-size: 18px; }
.lang-card:has(input:checked) { border: 2px solid var(--accent); background: var(--accent-soft); padding: 13px; }
.lang-card:has(input:focus-visible) { outline: 2px solid var(--primary); outline-offset: 2px; }
.chip-check { position: relative; display: inline-flex; align-items: center; min-height: 44px; padding: 8px 16px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); cursor: pointer; font-size: 16px; }
.chip-check input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.chip-check:has(input:checked) { border-color: var(--primary); background: var(--primary-soft); color: var(--primary); font-weight: 600; }
.chip-check:has(input:focus-visible) { outline: 2px solid var(--primary); outline-offset: 2px; }
.ob-goal-text { flex-basis: 100%; margin-top: 4px; }
.segmented { display: grid; grid-template-columns: repeat(4, 1fr); padding: 4px; background: var(--surface-2); border-radius: var(--radius); margin-left: 42px; }
.segmented label { position: relative; display: grid; place-items: center; min-height: 44px; border-radius: 8px; cursor: pointer; color: var(--text-2); }
.segmented label small { font-size: 12px; }
.segmented input { position: absolute; inset: 0; opacity: 0; margin: 0; cursor: pointer; }
.segmented label:has(input:checked) { background: var(--surface); color: var(--primary); font-weight: 600; box-shadow: 0 1px 2px rgb(31 29 26 / 8%); }
.radios { display: flex; flex-direction: column; gap: 8px; }
.ob-finish { margin-left: 0; }
.ob-next { display: flex; justify-content: flex-end; padding-left: 42px; }
.onboarding .ob-answer:not([hidden]) ~ .ob-answer { opacity: 1; }

/* ---------- session ---------- */
.session { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: auto minmax(0, 1fr); height: 100vh; height: 100dvh; }
.session-head { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--border); }
.session-title { flex: 1; min-width: 0; line-height: 1.25; }
.session-sub { display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.side-toggle { display: none; }
.session-head .session-fb { display: inline-grid; }
.dot-live { display: inline-block; width: 8px; height: 8px; border-radius: 50%; background: var(--ok); vertical-align: middle; margin-left: 4px; }
.seg-toggle { display: inline-flex; padding: 3px; background: var(--surface-2); border-radius: 999px; }
.seg-toggle button { min-width: 44px; min-height: 36px; border: 0; border-radius: 999px; background: none; color: var(--text-2); font-weight: 600; font-size: 14px; }
.seg-toggle button[aria-pressed="true"] { background: var(--surface); color: var(--accent); box-shadow: 0 1px 2px rgb(31 29 26 / 8%); }
.session-body { display: grid; grid-template-columns: minmax(0, 1fr) 360px; min-height: 0; }
.transcript-col { display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) auto auto auto; min-height: 0; min-width: 0; }
.transcript { overflow-y: auto; padding: 24px clamp(16px, 4vw, 48px); display: flex; flex-direction: column; gap: 22px; scroll-behavior: smooth; }
.turn { display: grid; grid-template-columns: 40px 1fr; gap: 12px; max-width: 72ch; }
.turn .who { font-size: 14px; }
.turn .who strong { margin-right: 6px; }
.turn .line { font-size: 18px; line-height: 1.7; margin-top: 2px; }
.turn.system .line { font-size: 15px; color: var(--text-2); font-style: italic; }
.w { border: 0; background: none; padding: 0 1px; margin: 0; border-radius: 4px; font: inherit; color: inherit; cursor: pointer; border-bottom: 1px dotted var(--border-strong); line-height: 1.4; }
.w:hover, .w.is-open { background: var(--accent-soft); color: var(--accent); border-bottom-color: var(--accent); }
.w.chosen { background: var(--accent-soft); border-bottom-color: var(--accent); }
.translation { color: var(--text-2); font-size: 15px; margin-top: 4px; }
.translation button { margin-left: 8px; font-size: 13px; color: var(--text-2); }
.hide-trans .translation { display: none; }
.corr { margin-top: 10px; padding: 10px 14px; border-left: 3px solid var(--bad); background: var(--bad-bg); border-radius: 0 var(--radius) var(--radius) 0; font-size: 15px; }
.corr s { color: var(--bad); }
.corr b { color: var(--text); }
.vocab-note { margin-top: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.drill { margin-top: 12px; padding: 16px; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); display: flex; flex-direction: column; gap: 12px; }
.drill .label { font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--primary); font-weight: 600; display: flex; align-items: center; gap: 6px; }
.drill .label::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--primary); }
.drill .prompt { font-size: 18px; }
.drill .options { display: grid; grid-template-columns: repeat(auto-fit, minmax(110px, 1fr)); gap: 8px; }
.drill .options button { min-height: 48px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); font-size: 16px; }
.drill .options button:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.thinking { padding: 0 clamp(16px, 4vw, 48px) 8px; display: flex; align-items: center; gap: 8px; font-size: 14px; }
.dots i { display: inline-block; width: 6px; height: 6px; margin-right: 3px; border-radius: 50%; background: var(--text-2); animation: blink 1.2s infinite; }
.dots i:nth-child(2) { animation-delay: 0.2s; } .dots i:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { opacity: 0.2; } 40% { opacity: 1; } }
.composer { display: grid; grid-template-columns: 1fr 44px 44px; gap: 10px; padding: 12px clamp(16px, 4vw, 48px) 16px; border-top: 1px solid var(--border); background: var(--surface); align-items: end; }
.composer textarea { min-height: 48px; max-height: 160px; border-radius: 12px; }
.composer .icon-btn { height: 48px; }
.session.voice .composer { padding-left: 16px; }
.summary-card { margin: 0 clamp(16px, 4vw, 48px) 16px; gap: 12px; }
.summary-card .deltas { display: flex; flex-wrap: wrap; gap: 6px; }
.remember-row { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-top: 1px solid var(--border); flex-wrap: wrap; }
.remember-row .grow { flex: 1; min-width: 200px; }
.side-panel { border-left: 1px solid var(--border); background: var(--surface); display: flex; flex-direction: column; gap: 4px; padding: 20px; overflow-y: auto; }
.side-handle { display: none; }
.side-section { display: flex; flex-direction: column; gap: 10px; padding: 12px 0; }
.side-section + .side-section { border-top: 1px solid var(--border); }
.side-foot { margin-top: auto; }
.chosen-tray { background: var(--surface-2); border-radius: var(--radius-lg); padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.voice-box { display: flex; flex-direction: column; align-items: center; gap: 12px; padding: 12px 0 20px; }
.mic-btn { display: grid; place-items: center; width: 112px; height: 112px; border-radius: 50%; border: 0; background: var(--primary); color: #fff; box-shadow: 0 8px 24px rgb(183 65 14 / 30%); transition: transform 150ms; }
.mic-btn .icon { width: 44px; height: 44px; }
.mic-btn:hover { background: var(--primary-hover); }
.mic-btn.on { box-shadow: 0 0 0 8px var(--primary-soft), 0 8px 24px rgb(183 65 14 / 30%); }
.mic-btn.speaking { background: var(--accent); box-shadow: 0 0 0 8px var(--accent-soft); }
.mic-btn:disabled { opacity: 0.6; }
.voice-state { display: flex; align-items: center; gap: 8px; font-weight: 500; }
.state-dot { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.voice-state.listening .state-dot { background: var(--ok); }
.voice-state.speaking .state-dot { background: var(--accent); }
.voice-state.thinking .state-dot { background: var(--warn); }
.popover { position: fixed; z-index: 50; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 12px 32px rgb(31 29 26 / 16%); padding: 14px 16px; display: flex; flex-direction: column; gap: 10px; font-size: 15px; }
.popover[hidden] { display: none; }
.pop-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.pop-head strong { font-size: 20px; color: var(--accent); }
.pop-close { border: 0; background: none; font-size: 22px; line-height: 1; width: 36px; height: 36px; border-radius: 8px; }
.pop-close:hover { background: var(--surface-2); }
.pop-body { display: flex; flex-direction: column; gap: 6px; }
.pop-trans { font-weight: 600; font-size: 17px; }
.pop-examples { display: flex; flex-direction: column; gap: 4px; padding: 10px 12px; background: var(--surface-2); border-radius: var(--radius); font-style: italic; color: var(--text-2); }
.pop-actions { display: flex; flex-wrap: wrap; gap: 6px; }

/* ---------- vocab ---------- */
.progress-bar { height: 6px; border-radius: 3px; background: var(--surface-2); overflow: hidden; }
.progress-bar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 200ms; }
.flip-card { position: relative; min-height: 260px; justify-content: center; align-items: stretch; cursor: pointer; text-align: center; }
.flip-card:focus-visible { outline: 2px solid var(--primary); }
.word-big { font-size: clamp(28px, 4vw, 40px); font-weight: 700; text-align: center; }
.flip-sound { position: absolute; top: 14px; right: 14px; border: 0; }
.grades { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.grades button { display: flex; flex-direction: column; align-items: center; gap: 2px; min-height: 64px; padding: 10px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); font-size: 16px; }
.grades button:hover { border-color: var(--border-strong); background: var(--surface-2); }
.search { flex: 1; max-width: 320px; }
.words li { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr) auto auto 36px; padding: 10px 0; }
.words li .grow { white-space: normal; overflow: visible; }
.words li.muted { display: block; }
.words .tr { color: var(--text-2); }
.words .due { font-family: var(--mono); font-size: 12px; color: var(--text-2); white-space: nowrap; }
.words .del { border: 0; background: none; color: var(--text-2); width: 36px; height: 36px; border-radius: 8px; }
.words .del:hover { background: var(--bad-bg); color: var(--bad); }

/* ---------- progress ---------- */
.bars { display: flex; align-items: flex-end; gap: 6px; height: 120px; }
.bars .day { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 4px; height: 100%; justify-content: flex-end; }
.bars .day i { width: 100%; max-width: 28px; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 2px; }
.bars .day span { font-family: var(--mono); font-size: 10px; color: var(--text-2); }

/* ---------- feedback sheet ---------- */
.sheet { border: 0; border-radius: var(--radius-lg); padding: 24px; width: min(480px, calc(100vw - 32px)); background: var(--surface); color: var(--text); box-shadow: 0 16px 48px rgb(31 29 26 / 24%); }
.sheet::backdrop { background: rgb(31 29 26 / 40%); }
.sheet > * + * { margin-top: 14px; }
.sheet-handle { display: none; }
.sentiments { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sentiments button { display: flex; flex-direction: column; align-items: center; gap: 6px; min-height: 92px; justify-content: center; border: 1px solid var(--border); border-radius: var(--radius-lg); background: var(--surface); font-weight: 600; }
.sentiments button .icon { width: 26px; height: 26px; }
.sentiments button[aria-pressed="true"] { border: 2px solid var(--primary); background: var(--primary-soft); color: var(--primary); }
.feedback-list li { align-items: flex-start; flex-direction: column; gap: 6px; }
.feedback-list .meta { display: flex; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--text-2); }

/* ---------- responsive ---------- */
@media (max-width: 960px) {
  #app { grid-template-columns: minmax(0, 1fr); }
  .nav { display: none; }
  .tabs { position: fixed; bottom: 0; left: 0; right: 0; z-index: 30; display: grid; grid-template-columns: repeat(4, 1fr); background: var(--surface); border-top: 1px solid var(--border); padding-bottom: env(safe-area-inset-bottom); }
  .tabs a { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; min-height: 60px; color: var(--text-2); text-decoration: none; font-size: 12px; font-weight: 500; }
  .tabs a[aria-current="page"] { color: var(--primary); }
  .session .tabs, body.in-session .tabs { display: none; }
  .fab { bottom: 76px; right: 12px; width: 48px; padding: 0; justify-content: center; }
  .words li { grid-template-columns: minmax(0, 1fr) auto 36px; row-gap: 2px; }
  .words li .tr { grid-column: 1; grid-row: 2; font-size: 14px; }
  .words li .status { grid-column: 2; grid-row: 1; justify-self: end; }
  .words li .due { grid-column: 2; grid-row: 2; justify-self: end; }
  .words li .del { grid-column: 3; grid-row: 1 / span 2; }
  .fab span { display: none; }
  .toast { bottom: 140px; }
  .grid-2 { grid-template-columns: 1fr; }
  .session-body { grid-template-columns: minmax(0, 1fr); grid-template-rows: minmax(0, 1fr) auto; }
  .side-panel { border-left: 0; border-top: 1px solid var(--border); border-radius: 20px 20px 0 0; max-height: 60vh; padding: 0 16px 12px; gap: 0; box-shadow: 0 -4px 16px rgb(31 29 26 / 6%); }
  .side-toggle { display: flex; flex-direction: column; align-items: stretch; gap: 6px; width: 100%; min-height: 44px; padding: 6px 0 4px; border: 0; background: none; }
  .side-handle { display: block; width: 48px; height: 5px; border-radius: 3px; background: var(--border-strong); margin: 0 auto; }
  .side-toggle-text { display: flex; align-items: center; justify-content: space-between; font-size: 14px; font-weight: 600; color: var(--text-2); }
  .side-toggle .chev { transform: rotate(90deg); transition: transform 150ms; width: 18px; height: 18px; }
  .side-panel:not(.collapsed) .side-toggle .chev { transform: rotate(-90deg); }
  .side-panel.collapsed .side-section { display: none; }
  .side-panel.collapsed { overflow: hidden; }
  .session-head .pill { padding: 6px 8px; font-size: 12px; }
  .seg-toggle button { min-width: 40px; }
  .side-section { padding: 10px 0; }
  .side-foot { margin-top: 0; }
  .voice-box { padding: 4px 0 12px; }
  .mic-btn { width: 84px; height: 84px; }
  .mic-btn .icon { width: 34px; height: 34px; }
  .transcript { padding: 16px; gap: 16px; }
  .turn { grid-template-columns: 32px 1fr; gap: 10px; }
  .turn .line { font-size: 17px; }
  .composer, .thinking { padding-left: 12px; padding-right: 12px; }
  .summary-card { margin: 0 12px 12px; }
  .session-head { padding: 8px 12px; gap: 8px; }
  .session-timer { font-size: 12px; }
  .form .two { grid-template-columns: 1fr; }
  .page { padding-bottom: 110px; }
}
@media (max-width: 480px) { .session-head .avatar { display: none; } }
@media (max-width: 360px) { .session-head .pill { display: none; } }
@media (max-width: 400px) {
  .segmented label small { display: none; }
  .grades { gap: 6px; }
  .grades button { padding: 8px 4px; font-size: 14px; }
  .actions.two { grid-template-columns: 1fr; }
  .drill .options { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .transcript { scroll-behavior: auto; } .dots i { animation: none; } }
button.chip { font: inherit; font-size: 14px; cursor: pointer; }
button.chip:hover:not(:disabled) { filter: brightness(0.96); }
button.chip:disabled { cursor: default; opacity: 0.85; }