@import"https://fonts.googleapis.com/css2?family=Baloo+2:wght@500;700;800&family=Nunito:ital,wght@0,400;0,600;0,700;1,400&display=swap";:root{--bg: #fff8ee;--card: #ffffff;--ink: #2d2a26;--muted: #6f675e;--accent: #ff6b4a;--accent-soft: #ffe3da;--blue: #4a7dff;--blue-soft: #e3ebff;--green: #2fb37c;--green-soft: #ddf5ec;--yellow: #ffc93c;--yellow-soft: #fff4d6;--radius: 20px;--shadow: 0 4px 16px rgba(45, 42, 38, .08)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Nunito,system-ui,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}h1,h2,h3,.display{font-family:"Baloo 2",system-ui,sans-serif;line-height:1.15;margin:0}a{color:var(--accent)}.container{max-width:920px;margin:0 auto;padding:0 20px}header.site{padding:28px 0 8px}header.site .brand{display:inline-flex;align-items:center;gap:10px;font-family:"Baloo 2",sans-serif;font-weight:800;font-size:1.25rem;color:var(--ink);text-decoration:none}header.site .brand .logo{width:38px;height:38px;display:grid;place-items:center;background:var(--accent);border-radius:12px;font-size:1.2rem}nav.days{display:flex;flex-wrap:wrap;gap:8px;padding:12px 0 4px}nav.days a{position:relative;display:grid;place-items:center;min-width:44px;height:44px;padding:0 6px;border-radius:12px;background:var(--card);box-shadow:var(--shadow);color:var(--muted);font-size:.95rem;font-weight:700;text-decoration:none;transition:transform .15s ease,color .15s ease}nav.days a:hover,nav.days a[aria-current=page]{transform:translateY(-2px);color:var(--accent);outline:2px solid var(--accent-soft)}nav.days a.locked{opacity:.45;cursor:default}nav.days a.locked:after{content:"🔒";position:absolute;top:-6px;right:-4px;font-size:.55rem;pointer-events:none}nav.days a.done:after{content:"✅";position:absolute;top:-6px;right:-4px;font-size:.55rem;pointer-events:none}footer.site{margin-top:56px;padding:28px 0 40px;color:var(--muted);font-size:.9rem;text-align:center}footer.site .notebook-link{display:inline-block;margin-top:8px;min-height:44px;line-height:44px;padding:0 12px;color:var(--muted);font-weight:700;font-size:.9rem;text-decoration:none}footer.site .notebook-link:hover{color:var(--accent)}.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;margin:20px 0}.card h2{font-size:1.35rem;margin-bottom:12px}.card p{margin:0 0 10px}.card p:last-child{margin-bottom:0}.kicker{display:inline-block;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;padding:4px 12px;border-radius:999px}.kicker.week2{background:var(--blue-soft);color:var(--blue)}.kicker.example{background:var(--green-soft);color:var(--green)}.kicker.challenge{background:var(--yellow-soft);color:#a87400}.formula{font-family:"Baloo 2",sans-serif;font-weight:700;font-size:1.3rem;text-align:center;background:var(--yellow-soft);border-radius:12px;padding:14px;margin:10px 0 0}.challenge-box{background:linear-gradient(135deg,#fffbe8,var(--yellow-soft));border:2px dashed var(--yellow);border-radius:var(--radius);padding:24px 28px;margin:20px 0}.challenge-box h2{color:#a87400;font-size:1.3rem;margin-bottom:8px}.challenge-box p{margin:0;font-size:1.08rem;font-weight:600}.lesson-nav{display:flex;justify-content:space-between;gap:12px;margin-top:28px}.lesson-nav a{font-weight:700;text-decoration:none;background:var(--card);box-shadow:var(--shadow);border-radius:14px;padding:12px 18px;transition:transform .15s ease}.lesson-nav a:hover{transform:translateY(-2px)}.lesson-nav .spacer{flex:1}.lesson-nav a.next{color:var(--accent)}strong{color:inherit}em{color:var(--muted)}.answer-card{background:linear-gradient(160deg,#ffffff,var(--green-soft));border:2px solid #bfe9d8}.answer-card textarea{display:block;width:100%;min-height:140px;padding:14px 16px;margin:12px 0;border:2px solid var(--green);border-radius:14px;background:#fff;color:var(--ink);font-family:Nunito,system-ui,sans-serif;font-size:1rem;line-height:1.5;resize:vertical}.answer-card textarea:focus{outline:3px solid rgba(47,179,124,.35)}.answer-card button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 26px;border:0;border-radius:999px;background:var(--green);color:#fff;font-family:"Baloo 2",sans-serif;font-size:1.05rem;font-weight:700;cursor:pointer;transition:transform .15s ease,filter .15s ease}.answer-card button:hover{transform:translateY(-2px);filter:brightness(1.05)}.answer-card button:disabled{opacity:.6;cursor:wait;transform:none}.answer-card .saved-note{display:block;margin-top:10px;color:var(--green);font-weight:700;font-size:.95rem}.locked-card{background:linear-gradient(160deg,#ffffff,var(--blue-soft));border:2px dashed var(--blue);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px 24px;margin:24px 0;text-align:center}.locked-card .big{font-size:2.6rem;margin-bottom:10px}.locked-card h2{font-size:1.4rem;color:var(--blue);margin-bottom:8px}.locked-card p{color:var(--muted);margin:0;font-weight:600}.celebrate-card{background:linear-gradient(160deg,#fffbe8,var(--yellow-soft));border:2px solid var(--yellow);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px 24px;margin:24px 0;text-align:center}.celebrate-card .big{font-size:2.4rem}.celebrate-card h2{font-size:1.35rem;color:#a87400;margin:8px 0 6px}.celebrate-card p{color:var(--muted);font-weight:600;margin:0}.lesson-nav a[aria-disabled=true]{opacity:.45;pointer-events:none}@media(max-width:640px){header.site{padding:20px 0 4px}header.site .brand{font-size:1.1rem}header.site .brand .logo{width:32px;height:32px;font-size:1rem}nav.days{gap:6px;padding:10px 0 2px}.container{padding:0 16px}.card{padding:20px 18px;margin:16px 0}.card h2{font-size:1.2rem}.card p,.card div{font-size:1rem}.challenge-box{padding:20px 18px;margin:16px 0}.challenge-box h2{font-size:1.15rem}.formula{font-size:1.15rem;padding:12px}.lesson-nav{gap:8px;margin-top:22px}.lesson-nav a{padding:14px 16px;font-size:.95rem}.answer-card textarea{min-height:160px}footer.site{margin-top:40px}h1{overflow-wrap:break-word}}