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22%,transparent)}.explanation-card.technical{background:color-mix(in srgb,var(--aina-ink-500) 4%,transparent);border-color:color-mix(in srgb,var(--aina-ink-500) 18%,transparent)}.explanation-card .ex-chip{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;padding:3px 8px;border-radius:9999px;flex-shrink:0}.explanation-card.role .ex-chip{background:var(--aina-tag-role-bg);color:var(--aina-tag-role-fg)}.explanation-card.never .ex-chip{background:var(--aina-tag-never-bg);color:var(--aina-tag-never-fg)}.explanation-card.rule .ex-chip{background:var(--aina-tag-rule-bg);color:var(--aina-tag-rule-fg)}.explanation-card.example .ex-chip{background:var(--aina-tag-example-bg);color:var(--aina-tag-example-fg)}.explanation-card.technical .ex-chip{background:var(--aina-tag-technical-bg);color:var(--aina-tag-technical-fg)}.explanation-card .ex-body{font-size:13.5px;color:var(--aina-text-primary);line-height:1.55}.explanation-card .ex-body strong{font-weight:600}.rubric-card{margin-top:14px;border:1px solid var(--aina-section-border);background:var(--aina-surface-2);border-radius:14px;padding:18px 20px;box-shadow:var(--aina-shadow-md)}.rubric-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px}.rubric-head .meta{font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--aina-gold);font-weight:700}.rubric-head .score{font-family:var(--aina-font-display);font-weight:600;font-size:38px;line-height:1;color:var(--aina-text-primary);margin-top:4px}.rubric-head .score .denom{font-size:16px;color:var(--aina-text-tertiary);font-family:var(--aina-font-sans);font-weight:500;margin-left:2px}.rubric-head .verdict{font-family:var(--aina-font-display);font-style:italic;font-size:16px;color:var(--aina-gold-bronze);margin-top:6px}.rubric-head .delta{font-size:12px;padding:4px 10px;border-radius:9999px;background:color-mix(in srgb,var(--aina-success) 10%,transparent);color:var(--aina-success);font-weight:600;display:inline-flex;align-items:center;gap:4px}.rubric-head .delta.neg{background:color-mix(in srgb,var(--aina-error) 10%,transparent);color:var(--aina-error)}.rubric-rows{margin-top:14px;display:flex;flex-direction:column;gap:10px}.rubric-row{display:grid;grid-template-columns:100px 1fr 56px;align-items:center;gap:12px;font-size:13.5px}.rubric-row .label{color:var(--aina-text-secondary);font-weight:500}.rubric-row .bar{height:6px;background:color-mix(in srgb,var(--aina-navy-900) 8%,transparent);border-radius:9999px;overflow:hidden}.rubric-row .bar-fill{height:100%;border-radius:9999px;transition:width .8s cubic-bezier(.16,1,.3,1)}.rubric-row.good .bar-fill{background:var(--aina-success)}.rubric-row.mid .bar-fill{background:var(--aina-warning)}.rubric-row.bad .bar-fill{background:var(--aina-error)}.rubric-row.good .score-cell{color:var(--aina-success)}.rubric-row.mid .score-cell{color:var(--aina-warning)}.rubric-row.bad .score-cell{color:var(--aina-error)}.rubric-row .score-cell{text-align:right;font-weight:600;font-size:13px;font-family:var(--aina-font-sans)}.rubric-feedback{margin-top:14px;padding-top:14px;border-top:1px solid var(--aina-section-border);display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:720px){.rubric-feedback{grid-template-columns:1fr}}.rubric-feedback h5{font-size:11px;letter-spacing:.12em;text-transform:uppercase;font-weight:700;margin:0 0 6px}.rubric-feedback .strengths h5{color:var(--aina-success)}.rubric-feedback .improvements h5{color:var(--aina-gold)}.rubric-feedback ul{margin:0;padding-left:16px;font-size:13px;color:var(--aina-text-secondary)}.rubric-feedback li{margin:4px 0}.action-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.chip{background:var(--aina-surface-2);border:1px solid var(--aina-section-border);border-radius:9999px;padding:8px 16px;font:inherit;font-size:13px;font-weight:600;color:var(--aina-text-primary);cursor:pointer;transition:background .12s,border .12s}.chip:hover{background:color-mix(in srgb,var(--aina-gold-500) 6%,transparent)}.chip.primary{background:var(--aina-gold-grad);color:var(--aina-gold-grad-text);border-color:transparent}.chip.primary:hover{filter:brightness(1.05)}.chip.ghost{background:transparent;color:var(--aina-text-tertiary)}.chip[disabled]{opacity:.45;cursor:not-allowed}.hint-stack{display:flex;flex-direction:column;gap:8px;margin-top:12px}.hint-card-item{border:1px solid var(--aina-section-border);border-radius:12px;padding:12px 14px;background:var(--aina-surface-2);cursor:pointer;transition:background .12s}.hint-card-item.locked{background:var(--aina-surface-3)}.hint-card-item.locked:hover{background:color-mix(in srgb,var(--aina-gold-500) 6%,transparent)}.hint-card-item.unlocked{border-color:color-mix(in srgb,var(--aina-gold) 34%,transparent);background:color-mix(in srgb,var(--aina-gold) 12%,var(--aina-surface-2))}.hint-card-item .hint-head{font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--aina-text-tertiary);font-weight:700;display:flex;justify-content:space-between;align-items:center}.hint-card-item .hint-title{font-family:var(--aina-font-display);font-style:italic;font-size:15px;color:var(--aina-text-primary);margin:4px 0 0}.hint-card-item .hint-title em{color:var(--aina-gold);font-style:italic}.hint-card-item .hint-body{font-size:13.5px;color:var(--aina-text-secondary);margin-top:8px;line-height:1.55;display:none}.hint-card-item.unlocked .hint-body{display:block}.hint-card-item .lock-icon{font-size:11px}.composer{border-top:1px solid var(--aina-section-border);padding:14px clamp(20px,6vw,96px) calc(14px + env(safe-area-inset-bottom));background:var(--aina-shell-bg);position:sticky;bottom:0}.suggestion-row{width:min(100%,772px);margin:0 auto 10px;display:flex;flex-wrap:wrap;gap:7px}.suggestion-chip{display:inline-flex;align-items:center;gap:6px;padding:7px 13px;border-radius:var(--aina-radius-full);border:1px solid var(--aina-section-border);background:var(--aina-surface-2);box-shadow:var(--aina-shadow-sm);color:var(--aina-text-secondary);font:inherit;font-size:12.5px;font-weight:500;cursor:pointer}.suggestion-chip.gold{border-color:color-mix(in srgb,var(--aina-gold) 45%,transparent);color:var(--aina-gold)}.suggestion-chip[disabled]{opacity:.45;cursor:not-allowed}.composer .input-wrap{width:min(100%,772px);margin:0 auto;background:var(--aina-surface-2);border:1px solid var(--aina-section-border);border-radius:12px;padding:8px 8px 8px 16px;display:flex;align-items:center;gap:8px;box-shadow:var(--aina-shadow-sm)}.composer .input-wrap:focus-within{border-color:color-mix(in srgb,var(--aina-gold) 40%,transparent);box-shadow:var(--aina-shadow-md)}.composer textarea{flex:1;border:0;background:transparent;outline:none;font:inherit;font-family:var(--aina-font-mono);font-size:13.5px;color:var(--aina-text-primary);padding:8px 4px;resize:none;min-height:22px;max-height:160px;line-height:1.55}.composer textarea::placeholder{color:var(--aina-text-faint);font-family:var(--aina-font-sans);font-style:italic;font-size:14px}.composer button.submit{background:var(--aina-gold-grad);color:var(--aina-gold-grad-text);border:0;border-radius:8px;padding:8px 16px;font:inherit;font-weight:600;font-size:13.5px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;transition:filter .12s}.composer button.submit:hover{filter:brightness(1.05)}.composer button.submit[disabled]{opacity:.45;cursor:not-allowed}.composer-help{display:flex;justify-content:space-between;align-items:center;margin-top:8px;font-size:11.5px;color:var(--aina-text-tertiary)}.kbd{display:inline-flex;align-items:center;gap:4px}.kbd kbd{font-family:var(--aina-font-mono);font-size:10.5px;border:1px solid var(--aina-section-border);background:var(--aina-surface-2);padding:1px 6px;border-radius:4px;color:var(--aina-text-tertiary)}.surface-card{border:1px solid var(--aina-section-border);border-radius:12px;background:var(--aina-surface-2);padding:14px 16px;box-shadow:var(--aina-shadow-sm)}.surface-card+.surface-card{margin-top:10px}.surface-card h3,.surface-card h4{margin:0 0 6px;color:var(--aina-text-primary)}.surface-card h3{font-family:var(--aina-font-display);font-style:italic;font-weight:600;font-size:18px}.surface-card h4{font-size:14px;font-weight:700}.surface-card p{margin:6px 0 0;color:var(--aina-text-secondary);line-height:1.55}.surface-card code{display:block;white-space:pre-wrap;margin-top:10px;color:var(--aina-text-secondary);font-family:var(--aina-font-mono);font-size:12.5px;line-height:1.55}.surface-card.fact{margin-left:18px;background:var(--aina-surface-3)}.surface-card.event{margin-left:36px;font-size:13px}.surface-list{display:grid;gap:10px;margin-top:12px}.surface-link{color:inherit;text-decoration:none;display:block}.metric-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}.metric{border:1px solid var(--aina-section-border);border-radius:8px;background:var(--aina-surface-3);padding:12px}.metric .label{display:block;color:var(--aina-text-tertiary);font-size:11px;letter-spacing:.12em;text-transform:uppercase;font-weight:700}.metric .value{display:block;margin-top:4px;color:var(--aina-text-primary);font-family:var(--aina-font-display);font-size:24px;font-weight:600}.mobile-only,.mobile-drawer-btn,.mobile-trajectory-btn{display:none}.drawer-backdrop{display:none;border:0;padding:0}@media(max-width:980px){.layout{grid-template-columns:240px 1fr 0}.right{display:none}}@media(max-width:720px){.layout{grid-template-columns:1fr}.left{position:fixed;top:0;left:0;bottom:0;width:84%;max-width:320px;z-index:30;transform:translate(-100%);transition:transform .24s ease;box-shadow:var(--aina-shadow-xl)}.left.open{transform:translate(0)}.drawer-backdrop{display:block;position:fixed;inset:0;background:var(--aina-overlay-backdrop);z-index:20;opacity:0;pointer-events:none;transition:opacity .24s}.drawer-backdrop.show{opacity:1;pointer-events:auto}.mobile-only{display:inline-flex}.mobile-drawer-btn,.mobile-trajectory-btn{display:inline-flex;align-items:center;justify-content:center;background:none;border:1px solid var(--aina-section-border);border-radius:8px;padding:6px 10px;font:inherit;font-size:12px;color:var(--aina-text-primary);cursor:pointer}.center-top{grid-template-columns:auto 1fr auto;gap:10px;padding:12px 14px 10px}.center-top .meta{font-size:10px}.center-top .lesson-h1{font-size:16px}.step-pips{display:none}.chat-stream{padding:18px 14px;gap:22px}.msg{max-width:100%}.msg-body{width:100%}.msg.user{max-width:92%}.msg.user .user-bubble{max-width:88%}.frontier-chat-controls{width:calc(100% - 28px);flex-direction:column;align-items:stretch}.lesson-tutor-controls{align-items:stretch;flex-direction:column}.stream-actions{display:grid;grid-template-columns:1fr 1fr}.modality-picker{grid-template-columns:repeat(2,minmax(0,1fr))}.mini-bar-row{grid-template-columns:72px minmax(0,1fr) 30px}.explainer-stage{aspect-ratio:4 / 3}.explainer-scene .scene-headline{font-size:20px}.explainer-scene .scene-elements{grid-template-columns:repeat(2,1fr)}.rubric-row{grid-template-columns:88px 1fr 42px;gap:8px;font-size:12.5px}.composer{padding:10px 12px calc(10px + env(safe-area-inset-bottom))}.composer textarea{font-size:14px}.metric-grid{grid-template-columns:1fr}}