:root{--bg:#f1f3ee;--card:#fff;--ink:#212b22;--soft:#5c6960;--accent:#3d7a55;--deep:#285a3c;--warm:#b98a52;--warn:#b87a3c;--line:#dce2d8;--r-bubble:16px 16px 16px 4px;--r-card:16px;--r-send:14px;--tex-opacity:.07;--font-body:-apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-display:Georgia, "Iowan Old Style", "Palatino Linotype", serif;--danger:#a3392f;--danger-soft:#f6e0dd;--shadow:0 1px 2px #1c2b2b0f, 0 4px 14px #1c2b2b14}*{box-sizing:border-box}html,body{height:100%;margin:0}body{font-family:var(--font-body);background:var(--bg);color:var(--ink);-webkit-font-smoothing:antialiased}h1,h2,h3{font-family:var(--font-display);margin:0}button,textarea,select,input{font-family:inherit}[data-tier=t1]{--bg:#f3efde;--card:#fffdf6;--ink:#23321f;--soft:#63705a;--accent:#4c8c4a;--deep:#2e5c2c;--warm:#d98a3d;--warn:#c97a3a;--line:#e2dbc2;--r-bubble:18px 18px 18px 5px;--r-card:20px;--r-send:55% 45% 60% 40% / 48% 55% 40% 60%;--tex-opacity:.11}[data-tier=t2]{--bg:#f1f3ee;--card:#fff;--ink:#212b22;--soft:#5c6960;--accent:#3d7a55;--deep:#285a3c;--warm:#b98a52;--warn:#b87a3c;--line:#dce2d8;--r-bubble:16px 16px 16px 4px;--r-card:16px;--r-send:14px;--tex-opacity:.07}[data-tier=t3]{--bg:#f0f2f0;--card:#fff;--ink:#1e2a22;--soft:#566158;--accent:#2f6e52;--deep:#1f4e3a;--warm:#b57a45;--warn:#c97a3a;--line:#d8ded9;--r-bubble:14px 14px 14px 3px;--r-card:14px;--r-send:10px;--tex-opacity:.045}[data-tier=t4]{--bg:#f2f3f4;--card:#fff;--ink:#1b2320;--soft:#545b57;--accent:#2c5c48;--deep:#1b4536;--accent2:#435066;--warm:#8c6a45;--warn:#b5602e;--line:#d6d9da;--r-bubble:11px 11px 11px 3px;--r-card:10px;--r-send:9px;--tex-opacity:.02}.tutor-shell{background:var(--bg);height:100dvh;color:var(--ink);flex-direction:column;display:flex;overflow:hidden}.tutor-main{flex-direction:column;flex:1;order:1;min-width:0;min-height:0;display:flex}.tutor-header{background:var(--card);border-bottom:1px solid var(--line);flex:none;justify-content:space-between;align-items:center;gap:10px;padding:12px 16px;display:flex}.tutor-brand{font-family:var(--font-display);color:var(--ink);align-items:center;gap:8px;min-width:0;font-size:17px;font-weight:700;display:flex}.tutor-brand .brand-dot{background:var(--accent);border-radius:50%;flex:none;width:10px;height:10px}.profile-switcher select{border:1px solid var(--line);background:var(--bg);color:var(--ink);border-radius:999px;max-width:46vw;padding:7px 14px;font-size:13px}.tag-label{letter-spacing:.06em;text-transform:uppercase;font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:11px}.topic-card{background:var(--deep);color:#f6f4e8;border-radius:var(--r-card) var(--r-card) var(--r-card) 4px;flex:none;align-items:flex-start;gap:12px;margin:12px 16px;padding:13px 14px;display:flex;position:relative;overflow:hidden}[data-tier=t4] .topic-card{padding:11px 13px}.topic-card:before{content:"";pointer-events:none;opacity:var(--tex-opacity);background-image:radial-gradient(circle at 8px 10px,#fff 1.6px,#0000 0),radial-gradient(circle at 26px 4px,#fff 1px,#0000 0),radial-gradient(circle at 20px 24px,#fff 1.3px,#0000 0);background-size:34px 30px;position:absolute;inset:0}.topic-card--loading,.topic-card--empty{border-radius:var(--r-card);color:var(--soft);background:var(--card);border:1px dashed var(--line);flex:none;margin:12px 16px;padding:12px 14px;font-size:13.5px}.topic-medallion{z-index:1;background:#ffffff26;border-radius:50%;flex:none;justify-content:center;align-items:center;width:38px;height:38px;display:flex;position:relative}.mi-leaf{background:#f6f4e8;border-radius:0 70%;width:20px;height:20px;position:relative}.mi-leaf:after{content:"";background:var(--deep);width:1px;position:absolute;top:12%;bottom:12%;left:50%;transform:translate(-50%)rotate(18deg)}.mi-genes{grid-template-rows:repeat(2,7px);grid-template-columns:repeat(2,7px);gap:2px;display:grid}.mi-genes span{border-radius:2px}.mi-genes span:first-child,.mi-genes span:nth-child(2),.mi-genes span:nth-child(3){background:#f6f4e8}.mi-genes span:nth-child(4){background:#f6f4e866}.mi-dot{background:#f6f4e8;border-radius:50%;width:12px;height:12px;display:block}.topic-card-body{z-index:1;flex:1;min-width:0;position:relative}.topic-card-eyebrow{opacity:.72;margin-bottom:2px;display:block}.topic-card-title{font-family:var(--font-display);margin:0;font-size:16px;font-weight:600}[data-tier=t4] .topic-card-title{font-size:14.5px}.topic-card-stage{opacity:.85;margin:5px 0 0;font-size:12.5px}.error-card{background:var(--card);border:1px solid var(--warn);border-radius:var(--r-card);flex:none;margin:0 16px 12px;padding:13px 14px;font-size:13.5px}.error-card-title{text-transform:uppercase;letter-spacing:.05em;color:var(--warn);margin:0 0 10px;font-family:ui-monospace,monospace;font-size:10.5px;font-weight:700}.error-row{align-items:flex-start;gap:9px;display:flex}.error-dot{background:var(--soft);border-radius:50%;flex:none;width:7px;height:7px;margin-top:5px}.error-dot--info{background:var(--soft)}.error-label{text-transform:uppercase;letter-spacing:.04em;color:var(--soft);margin-bottom:2px;font-family:ui-monospace,monospace;font-size:10px;display:block}.error-card-meta{color:var(--soft);margin:8px 0 0;font-size:12px}.visual-card,.visual-inline{--visual-bg:var(--bg);--visual-card:var(--card);--visual-accent:var(--accent);--visual-deep:var(--deep);--visual-line:var(--line);--visual-soft:var(--soft)}.visual-card{border:1px solid var(--line);border-radius:var(--r-card);background-color:var(--card);background-image:radial-gradient(var(--line) 1px, transparent 0);background-size:13px 13px;flex:none;padding:12px}.visual-inline .visual-card{margin:0 16px 12px}.visual-card-head{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.visual-diagram{margin:0 auto;display:block}.visual-caption{color:var(--soft);text-align:center;margin:6px 0 0;font-size:12px}.visual-eq{text-align:center;color:var(--soft);letter-spacing:.01em;margin:8px 0 0;font-family:ui-monospace,monospace;font-size:11px}.punnett{grid-template-columns:30px repeat(2,1fr);gap:3px;max-width:190px;margin:0 auto;display:grid}.punnett-cell{aspect-ratio:1;border-radius:6px;justify-content:center;align-items:center;font-family:ui-monospace,monospace;font-size:13px;font-weight:700;display:flex}.punnett-corner{color:var(--soft);background:0 0}.punnett-head{background:var(--bg);color:var(--soft);font-size:12px}.punnett-dom{background:var(--accent);color:#fff}.punnett-rec{background:var(--warn);color:#fff}@media (min-width:1024px){.visual-inline{display:none}}.chat-thread{-webkit-overflow-scrolling:touch;flex-direction:column;flex:auto;gap:12px;padding:16px;display:flex;overflow-y:auto}.chat-thread--center{justify-content:center;align-items:center}.chat-status{color:var(--soft);font-size:14px}.chat-empty{background:var(--card);border:1px dashed var(--line);border-radius:var(--r-card);color:var(--soft);text-align:center;padding:18px;font-size:14.5px}.msg-bubble{border-radius:var(--r-bubble);max-width:84%;padding:11px 15px;font-size:15px;line-height:1.55}[data-tier=t4] .msg-bubble{font-size:14.5px}.msg-bubble p{margin:0 0 8px}.msg-bubble p:last-child{margin-bottom:0}.msg-bubble ul,.msg-bubble ol{margin:0 0 8px;padding-left:1.3em}.msg-bubble ul:last-child,.msg-bubble ol:last-child{margin-bottom:0}.msg-bubble li{margin-bottom:2px}.msg-bubble li:last-child{margin-bottom:0}.msg-bubble strong{font-weight:700}.msg-bubble em{font-style:italic}.msg-bubble--assistant{background:var(--card);border:1px solid var(--line);box-shadow:var(--shadow);align-self:flex-start}.msg-bubble--user{background:var(--deep);color:#f6f4e8;align-self:flex-end}.typing-indicator{background:var(--card);border:1px solid var(--line);border-radius:var(--r-bubble);align-self:flex-start;gap:5px;padding:12px 15px;display:flex}.typing-indicator span{background:var(--soft);opacity:.5;border-radius:50%;width:7px;height:7px;animation:1.1s ease-in-out infinite typing-bounce}.typing-indicator span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{opacity:.4;transform:translateY(0)}30%{opacity:1;transform:translateY(-4px)}}@media (prefers-reduced-motion:reduce){.typing-indicator span{opacity:.7;animation:none}}.chat-error{background:var(--danger-soft);color:var(--danger);border:1px solid var(--danger);text-align:center;border-radius:10px;align-self:center;max-width:90%;padding:8px 14px;font-size:13.5px}.progress-slot{border:1px dashed var(--line);color:var(--soft);text-align:center;background:var(--card);border-radius:10px;flex:none;margin:0 16px 10px;padding:8px 12px;font-size:12.5px}.chat-hint{color:var(--soft);text-align:center;background:var(--card);flex:none;padding:4px 12px;font-size:11.5px}.chat-input{padding:10px 12px;padding-bottom:max(10px, env(safe-area-inset-bottom));background:var(--card);border-top:1px solid var(--line);flex:none;gap:8px;display:flex}.chat-input-field{resize:none;border:1px solid var(--line);border-radius:var(--r-card);background:var(--bg);max-height:120px;color:var(--ink);flex:1;padding:11px 16px;font-size:15px;line-height:1.4}.chat-input-field:disabled{opacity:.6}.chat-send{border-radius:var(--r-send);background:var(--accent);color:#fff;cursor:pointer;border:none;flex:none;width:44px;height:44px;font-size:16px}.chat-send:disabled{opacity:.4;cursor:default}.tutor-nav{padding:6px 4px;padding-bottom:max(6px, env(safe-area-inset-bottom));background:var(--card);border-top:1px solid var(--line);flex:none;order:2;justify-content:space-around;display:flex}.nav-item{color:var(--soft);flex-direction:column;align-items:center;gap:3px;min-width:56px;padding:6px 10px;font-size:10.5px;display:flex}.nav-item .nav-ic{opacity:.2;background:currentColor;border-radius:6px;width:20px;height:20px}.nav-item--active{color:var(--accent);font-weight:700}.nav-item--active .nav-ic{opacity:.9;background:var(--accent)}@media (min-width:768px){.tutor-shell{flex-direction:row}.tutor-main{order:2}.tutor-nav{border-top:none;border-right:1px solid var(--line);flex-direction:column;order:1;justify-content:flex-start;gap:10px;width:68px;padding:16px 6px}.nav-item{min-width:0}}@media (min-width:1024px){.tutor-nav{align-items:stretch;width:220px;padding:20px 14px}.nav-item{border-radius:10px;flex-direction:row;justify-content:flex-start;gap:10px;padding:9px 12px;font-size:14px}.nav-item--active{background:var(--bg)}.chat-thread,.chat-input,.topic-card,.visual-inline .visual-card,.error-card{margin-left:24px;margin-right:24px}.chat-thread{padding-left:0;padding-right:0}.chat-input{padding-left:8px;padding-right:8px}.msg-bubble{max-width:70%}.context-panel{background:var(--card);border-left:1px solid var(--line);flex-direction:column;flex:0 0 320px;order:3;gap:18px;padding:22px 20px;display:flex;overflow-y:auto}}@media (max-width:1023px){.context-panel{display:none}}.context-block{flex-direction:column;gap:8px;display:flex}.context-label{text-transform:uppercase;letter-spacing:.05em;color:var(--soft);font-size:11.5px;font-weight:700}.vroute{flex-direction:column;gap:0;display:flex}.vnode{gap:11px;padding-bottom:16px;display:flex;position:relative}.vnode:before{content:"";background:var(--line);width:2px;position:absolute;top:16px;bottom:0;left:6px}.vnode:last-child:before{display:none}.vdot{border-radius:50%;flex:none;width:13px;height:13px;margin-top:2px}.vdot--done{background:var(--deep)}.vdot--current{background:var(--accent);width:16px;height:16px;box-shadow:0 0 0 2px var(--deep)}.vdot--next{background:var(--card);border:2px solid var(--line)}.vlabel{font-size:13px}.vlabel--current{font-weight:700}.vlabel--next{color:var(--soft)}.craft-page{--cr-bg:#f0e1c4;--cr-card:#fbf4e2;--cr-ink:#33291a;--cr-soft:#6b5d46;--cr-accent:#5c7a4e;--cr-accent-deep:#435c39;--cr-line:#dcc89a;--cr-badge-fill:#e3e8d2;--cr-danger:#a3392f;--cr-danger-soft:#f6e0dd;--cr-shadow:0 3px 10px #503c1914, 0 14px 32px #503c1917;--cr-r-card:18px;background:var(--cr-bg);min-height:100dvh;color:var(--cr-ink);font-family:var(--font-body);flex-direction:column;display:flex}.craft-inner{flex-direction:column;flex:1;width:100%;max-width:960px;margin:0 auto;padding:40px 24px 48px;display:flex}.craft-brand{align-items:center;gap:10px;margin-bottom:28px;display:flex}.craft-brand-dot{background:var(--cr-accent-deep);border-radius:50%;flex:none;width:11px;height:11px}.craft-brand-name{font-family:var(--font-display);font-size:18px;font-weight:700}.craft-lede{font-family:var(--font-display);max-width:22ch;margin:0 0 10px;font-size:26px;font-weight:600;line-height:1.28}.craft-sub{color:var(--cr-soft);max-width:44ch;margin:0 0 22px;font-size:14.5px;line-height:1.55}.craft-badge{background:var(--cr-badge-fill);border:1px solid var(--cr-accent-deep);width:fit-content;color:var(--cr-accent-deep);border-radius:999px;align-items:center;margin-bottom:22px;padding:9px 18px;font-size:13.5px;font-weight:700;display:inline-flex}.craft-card{background:var(--cr-card);border:1px solid var(--cr-line);border-radius:var(--cr-r-card) var(--cr-r-card) var(--cr-r-card) 5px;box-shadow:var(--cr-shadow);width:100%;max-width:420px;padding:22px 22px 24px}.craft-field{flex-direction:column;gap:5px;margin-bottom:14px;display:flex}.craft-field label{color:var(--cr-soft);font-size:12px;font-weight:700}.craft-field input,.craft-field select{border:1px solid var(--cr-line);font-size:14.5px;font-family:var(--font-body);background:var(--cr-bg);color:var(--cr-ink);border-radius:10px;padding:11px 13px}.craft-field .craft-hint{color:var(--cr-soft);font-size:11.5px}.craft-cb-line{color:var(--cr-ink);align-items:flex-start;gap:9px;margin:12px 0;font-size:12.5px;line-height:1.45;display:flex}.craft-cb-line input[type=checkbox]{width:16px;height:16px;accent-color:var(--cr-accent-deep);flex:none;margin-top:1px}.craft-cb-line a{color:var(--cr-accent-deep);font-weight:600;text-decoration:underline}.craft-btn{background:var(--cr-accent-deep);color:#fdfbf3;width:100%;font-family:var(--font-body);cursor:pointer;border:none;border-radius:12px;margin-top:6px;padding:13px;font-size:14.5px;font-weight:700}.craft-btn:disabled{opacity:.38;cursor:default}.craft-btn--secondary{border:1px solid var(--cr-accent-deep);color:var(--cr-accent-deep);background:0 0}.craft-below{text-align:center;color:var(--cr-soft);margin-top:14px;font-size:12.5px}.craft-below a{color:var(--cr-accent-deep);font-weight:600}.craft-error{background:var(--cr-danger-soft);color:var(--cr-danger);border:1px solid var(--cr-danger);border-radius:10px;margin-bottom:14px;padding:9px 14px;font-size:13px}.craft-foot{border-top:1px solid var(--cr-line);color:var(--cr-soft);flex-wrap:wrap;gap:6px 18px;margin-top:34px;padding-top:16px;font-size:11px;display:flex}.craft-foot a{color:var(--cr-soft)}.craft-choice-row{flex-direction:column;gap:12px;width:100%;max-width:340px;display:flex}.craft-choice-btn{border-radius:var(--cr-r-card) var(--cr-r-card) var(--cr-r-card) 5px;background:var(--cr-card);border:1px solid var(--cr-line);width:100%;color:var(--cr-ink);font-family:var(--font-display);text-align:left;cursor:pointer;box-shadow:var(--cr-shadow);padding:16px 20px;font-size:16px;font-weight:700;display:block}.craft-choice-btn:hover{border-color:var(--cr-accent-deep)}.craft-child-card{background:var(--cr-card);border:1px solid var(--cr-line);border-radius:14px;margin-bottom:12px;padding:16px 18px}.craft-child-name{font-family:var(--font-display);margin:0 0 2px;font-size:16px;font-weight:700}.craft-child-meta{color:var(--cr-soft);margin:0 0 12px;font-size:13px}.craft-child-actions{flex-wrap:wrap;gap:8px;display:flex}.craft-child-actions a,.craft-child-actions button{border:1px solid var(--cr-line);background:var(--cr-bg);color:var(--cr-ink);cursor:pointer;border-radius:8px;padding:7px 12px;font-size:12.5px;font-weight:600;text-decoration:none}.craft-topnav{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:8px;display:flex}.craft-topnav .craft-brand{margin-bottom:0}.craft-topnav-links{gap:18px;font-size:13.5px;display:flex}.craft-topnav-links a{color:var(--cr-soft);text-decoration:none}.craft-topnav-links a:hover{color:var(--cr-accent-deep)}.craft-hero{font-family:var(--font-display);max-width:16ch;margin:18px 0 14px;font-size:clamp(28px,5vw,40px);font-weight:600;line-height:1.2}.craft-btn-row{flex-wrap:wrap;gap:10px;margin:22px 0 8px;display:flex}.craft-btn-row .craft-btn,.craft-btn-row .craft-btn--secondary{flex:none;width:auto}.craft-section{margin:34px 0}.craft-section-title{font-family:var(--font-display);margin:0 0 14px;font-size:20px;font-weight:700}.craft-feature-list{flex-direction:column;gap:9px;margin:0;padding:0;list-style:none;display:flex}.craft-feature-list li{align-items:flex-start;gap:10px;font-size:14.5px;display:flex}.craft-feature-list li:before{content:"✓";color:var(--cr-accent-deep);flex:none;font-weight:700}.craft-pricing-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}@media (max-width:720px){.craft-pricing-grid{grid-template-columns:1fr}}.craft-price-card{background:var(--cr-card);border:1px solid var(--cr-line);border-radius:var(--cr-r-card) var(--cr-r-card) var(--cr-r-card) 5px;box-shadow:var(--cr-shadow);flex-direction:column;gap:8px;padding:22px 20px;display:flex}.craft-price-card--highlight{border-color:var(--cr-accent-deep);border-width:2px}.craft-price-amount{font-family:var(--font-display);font-size:24px;font-weight:700}.craft-price-period{color:var(--cr-soft);font-size:13px;font-weight:400}.craft-price-desc{color:var(--cr-soft);font-size:14px}.craft-steps{counter-reset:craft-step;flex-direction:column;gap:10px;margin:0;padding:0;list-style:none;display:flex}.craft-steps li{counter-increment:craft-step;align-items:baseline;gap:12px;font-size:14.5px;display:flex}.craft-steps li:before{content:counter(craft-step);background:var(--cr-badge-fill);width:22px;height:22px;color:var(--cr-accent-deep);border-radius:50%;flex:none;justify-content:center;align-items:center;font-size:12px;font-weight:700;display:flex}.craft-legal-body h2{font-family:var(--font-display);border-top:1px solid var(--cr-line);margin:28px 0 10px;padding-top:10px;font-size:18px}.craft-legal-body h2:first-child{border-top:none;margin-top:0;padding-top:0}.craft-legal-body ol{color:var(--cr-ink);margin:0 0 4px;padding-left:1.4em;font-size:14px;line-height:1.6}.craft-legal-body ol ol{margin-top:6px}.craft-legal-body li{margin-bottom:10px}.craft-legal-body table{border-collapse:collapse;width:100%;margin:12px 0;font-size:13.5px}.craft-legal-body th,.craft-legal-body td{border:1px solid var(--cr-line);text-align:left;padding:8px 10px}.craft-legal-body th{background:var(--cr-badge-fill);color:var(--cr-accent-deep);font-weight:700}.craft-requisites-table{border-collapse:collapse;width:100%;font-size:14.5px}.craft-requisites-table td{border-bottom:1px solid var(--cr-line);padding:9px 0}.craft-requisites-table td:first-child{color:var(--cr-soft);width:44%}.craft-requisites-table .craft-ph{color:var(--cr-accent-deep);background:var(--cr-badge-fill);border-radius:4px;padding:1px 7px;font-family:ui-monospace,monospace;font-size:13px}.craft-site-footer{border-top:1px solid var(--cr-line);margin-top:56px;padding:24px}.craft-site-footer-inner{max-width:960px;color:var(--cr-soft);flex-wrap:wrap;gap:8px 22px;margin:0 auto;font-size:12.5px;display:flex}.craft-site-footer-inner a{color:var(--cr-soft);text-decoration:none}.craft-site-footer-inner a:hover{color:var(--cr-accent-deep)}