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components;@layer utilities{.invisible{visibility:hidden}.visible{visibility:visible}.sr-only{clip-path:inset(50%);white-space:nowrap;border-width:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.fixed{position:fixed}.static{position:static}.block{display:block}.hidden{display:none}.table{display:table}.ordinal{--tw-ordinal:ordinal;font-variant-numeric:var(--tw-ordinal,) var(--tw-slashed-zero,) var(--tw-numeric-figure,) var(--tw-numeric-spacing,) var(--tw-numeric-fraction,)}}:root{--paper:#f8f7f3;--ink:#30392f;--muted:#777c70;--green:#445b43;--line:#e0e2d8;--serif:Georgia, "Times New Roman", 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span{font-size:19px;line-height:1}.start-note{color:#888d80;margin-top:14px;font-size:11px}.lesson-preview{width:372px;height:362px;box-shadow:9px 13px 0 -1px var(--paper), 9px 13px 0 0 #e3e5dc;background:#eef0e6;border:1px solid #e1e5d6;padding:28px 30px;position:absolute;top:149px;right:24px;overflow:hidden;transform:rotate(-3deg)}.preview-heading{letter-spacing:1.3px;color:#72816b;align-items:center;font-size:8px;display:flex}.preview-heading .brand-mark{width:27px;height:27px;margin-right:9px}.preview-number{font-family:var(--serif);margin-left:auto;font-size:14px}.preview-question{font-family:var(--serif);letter-spacing:-.7px;margin:36px 0 26px;font-size:28px;line-height:1.4}.preview-rule{background:#a6b199;width:32px;height:1px}.preview-text{color:#818b75;margin-top:22px;font-size:11px;line-height:1.9}.preview-decoration{font-family:var(--serif);color:#dfe5d5;z-index:-1;font-size:200px;line-height:1;position:absolute;bottom:-53px;right:-4px}.principles{border-top:1px solid 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0;display:grid}.message-skeleton span{background:linear-gradient(100deg,#eef0e7 25%,#f8f9f3 50%,#eef0e7 75%) 0 0/200% 100%;border-radius:4px;height:12px;animation:1.8s ease-in-out infinite shimmer}.message-skeleton span:nth-child(2){width:88%}.message-skeleton span:nth-child(3){width:58%}@keyframes typing{0%,60%,to{opacity:.45;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.input-area{background:#fdfcf9;border-top:1px solid #edf0e6;padding:16px 23px 12px}.composer{background:#fffefa;border:1px solid #dce0d1;border-radius:6px;padding:14px 15px 11px}.composer:focus-within{border-color:#99a38b;box-shadow:0 0 0 2px #99a38b12}.composer textarea{resize:none;width:100%;color:var(--ink);background:0 0;border:0;outline:none;padding:0;font:13px/1.6 Arial,Helvetica,sans-serif}.composer textarea::placeholder{color:#a2a794}.composer-bottom{justify-content:space-between;align-items:center;gap:10px;display:flex}.composer-bottom>span{color:#9aa28e;font-size:9px}.send-button{background:var(--green);color:#fff;border:0;border-radius:4px;align-items:center;gap:20px;padding:9px 13px;font-size:11px;display:flex}.send-button span{font-size:16px}.keyboard-note{text-align:center;color:#a0a694;margin:10px 0 0;font-size:8px}.keyboard-note span{padding:0 7px}.error{color:#9d543f;margin:0 0 12px;font-size:12px;line-height:1.6}.lesson-finished{text-align:center;padding:10px}.lesson-finished p{font-family:var(--serif);margin:0 0 18px;font-size:18px}@keyframes arrive{0%{opacity:0;transform:translateY(4px)}to{opacity:1;transform:translateY(0)}}@media (min-width:1400px){.landing{max-width:1150px;padding-top:100px}.landing h1{font-size:108px}.lesson-preview{width:405px;height:380px;padding:30px 35px;top:180px;right:25px}.preview-question{font-size:31px}.principles{margin-top:74px}}@media (max-width:1050px){.site-shell{padding:0 35px}.landing{padding-top:65px}.landing h1{font-size:83px}.lesson-preview{width:310px;height:340px;padding:25px;top:150px;right:10px}.preview-question{font-size:24px}.hero-description{font-size:14px}.lesson-layout{grid-template-columns:200px minmax(0,1fr);gap:28px}.lesson-sidebar h1{font-size:38px}.header-caption{display:none}.principles{gap:35px}.approach{right:35px}}@media (max-width:760px){.site-shell{padding:0 22px}.site-header{height:82px}.brand{font-size:28px}.brand .brand-mark{width:29px;height:29px}.landing{min-height:auto;padding:49px 0 0}.landing h1{letter-spacing:-4px;margin:26px 0;font-size:78px}.hero-description{font-size:14px}.lesson-preview{width:340px;max-width:100%;height:300px;margin:52px auto 36px;padding:23px 27px;position:relative;top:auto;right:auto;transform:rotate(-2deg)}.preview-question{margin:24px 0 20px;font-size:26px}.preview-text{margin-top:16px}.principles{justify-content:space-between;gap:16px;margin-top:32px;padding:24px 0}.principles>div{display:block}.principles p{margin-top:8px;font-size:9px}.site-footer{padding:18px 0;font-size:9px;line-height:1.6}.site-footer>span:last-child{gap:9px}.site-footer>span:first-child{max-width:180px}.lesson-sidebar{display:none}.lesson-layout{flex:1;padding:22px 0;display:block}.conversation-panel{height:calc(100dvh - 192px);min-height:420px}.conversation-header{padding:18px}.chat{padding:16px 20px}.input-area{padding:12px 13px}.conversation-intro{padding-top:18px}.teacher .message-content{font-size:17px}.composer-bottom>span{font-size:8px}.approach{width:auto;max-width:360px;margin-left:auto;top:72px;left:22px;right:22px}.keyboard-note{display:none}.message{max-width:96%}.header-right{gap:0}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}button.brand{color:inherit;background:0 0;border:0;padding:0}.lesson-selector{border-top:1px solid var(--line);max-width:430px;margin-top:34px;padding-top:24px}.lesson-selector>p{color:var(--muted);margin-bottom:14px}.lesson-selector button{text-align:left;border:0;border-bottom:1px solid var(--line);width:100%;color:var(--ink);background:0 0;align-items:center;gap:14px;padding:13px 0;font-size:12px;display:flex}.lesson-selector button>span:first-child{color:var(--green);width:14px}.lesson-selector button:hover:not(:disabled){background:#eef0e6}.conversation-intro>span{text-transform:uppercase}@media (max-width:760px){.lesson-selector{max-width:100%}}.message-audio{align-items:center;gap:10px;margin-top:8px;display:flex}.learner .message-audio{justify-content:flex-end}.listen-button{color:#637157;cursor:pointer;background:0 0;border:0;border-radius:4px;align-items:center;gap:6px;min-height:36px;padding:4px 6px;font-size:11px;display:inline-flex}.listen-button:hover,.listen-button[aria-pressed=true]{color:#39482e;background:#eef0e7}.listen-button:disabled{opacity:.5;cursor:default}.listen-button:focus-visible{outline-offset:3px;outline:2px solid #637157}.audio-error{color:#7c5540;font-size:12px}.lesson-home{flex:1;grid-template-columns:minmax(230px,320px) minmax(0,760px);align-items:start;gap:clamp(40px,7vw,100px);width:100%;max-width:1180px;margin:0 auto;padding:56px 0;display:grid}.lesson-home .lesson-sidebar{display:block;position:sticky;top:32px}.lesson-home .lesson-details{margin:30px 0}.lesson-home .lesson-selector{max-width:none;margin-top:0;padding-top:20px}.lesson-home .lesson-selector button{border-radius:4px;min-height:62px;padding:16px 12px;line-height:1.6}.lesson-home .lesson-selector button>span:first-child{flex-shrink:0}.chat-mode.site-shell{max-width:none;height:100dvh;min-height:0;padding:0;overflow:hidden}.chat-mode .site-header{height:64px;padding:0 28px}.chat-mode .brand{font-size:26px}.chat-mode .header-caption{display:none}.chat-mode .lesson-layout{width:100%;min-height:0;padding:0;display:flex}.chat-mode .conversation-panel{width:100%;height:auto;min-height:0;box-shadow:none;border:0;border-radius:0;flex:1}.chat-mode .conversation-header{flex-shrink:0;gap:16px;padding:12px 28px}.chat-mode .conversation-header>div{flex:1;justify-content:center}.chat-mode .conversation-header p,.chat-mode .conversation-header .brand-mark{display:none}.chat-mode .conversation-intro{flex-shrink:0;width:min(100%,840px);margin:0 auto;padding:16px 24px 8px}.chat-mode .conversation-intro p{display:none}.chat-mode .chat{min-height:0;padding:24px max(24px,50% - 396px)}.chat-mode .message{margin-bottom:32px}.chat-mode .input-area{width:min(100%,840px);padding:12px 24px max(12px, env(safe-area-inset-bottom));border-top:0;flex-shrink:0;margin:0 auto}.chat-mode .composer{border-radius:18px;box-shadow:0 3px 18px #343c2d06}.back-to-lessons{white-space:nowrap;min-height:36px}@media (max-width:760px){.lesson-home{grid-template-columns:1fr;gap:32px;padding:24px 0}.lesson-home .lesson-sidebar{padding-top:0;position:static}.lesson-home .lesson-sidebar h1{margin-top:18px;font-size:40px}.lesson-home .sidebar-note{display:none}.chat-mode .site-header{height:56px;padding:0 16px}.chat-mode .conversation-header{flex-wrap:wrap;gap:8px;padding:8px 16px}.chat-mode .conversation-header h2{font-size:11px}.chat-mode .conversation-intro{padding:12px 16px 4px}.chat-mode .chat{padding:18px 16px}.chat-mode .input-area{padding:8px 12px max(8px, env(safe-area-inset-bottom))}}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}