:root{--ink:#26322d;--muted:#68736d;--paper:#f8f5ef;--white:#fff;--red:#a94232;--red-dark:#823226;--sage:#dce5da;--line:#e3ded4;--serif:"Noto Serif SC",Georgia,serif;--sans:"DM Sans",Arial,sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.6}.site-header{height:78px;padding:0 clamp(24px,6vw,90px);display:flex;align-items:center;justify-content:space-between;background:rgba(248,245,239,.94);border-bottom:1px solid var(--line);position:relative;z-index:2}.brand{display:flex;align-items:center;gap:12px;font-weight:700;letter-spacing:-.02em}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:50%;background:var(--red);color:white;font-family:var(--serif);font-size:18px}.header-link{color:var(--ink);text-decoration:none;font-size:14px;font-weight:600}.hero{min-height:620px;display:grid;grid-template-columns:1fr 1fr;position:relative;background:#e7ded0}.hero-image{grid-area:1/1/2/3;background:linear-gradient(90deg,rgba(248,245,239,.96) 0%,rgba(248,245,239,.72) 33%,rgba(248,245,239,.05) 59%),url('assets/mandarin-study-hero.webp') center/cover no-repeat}.hero-copy{grid-area:1/1;align-self:center;z-index:1;padding:70px 8vw;max-width:670px}.eyebrow{text-transform:uppercase;letter-spacing:.15em;font-size:12px;font-weight:700;color:var(--red);margin:0 0 15px}.hero h1{font-family:var(--serif);font-size:clamp(47px,6vw,78px);line-height:1.08;letter-spacing:-.04em;margin:0 0 24px;font-weight:600}.hero h1 em{font-weight:500;color:var(--red);font-style:normal}.hero-copy>p:not(.eyebrow){max-width:530px;font-size:18px;color:#53605a}.primary-button{display:inline-flex;align-items:center;gap:30px;margin-top:20px;background:var(--red);color:#fff;padding:14px 20px;border-radius:5px;text-decoration:none;font-weight:600;transition:.2s}.primary-button:hover{background:var(--red-dark);transform:translateY(-2px)}.lessons-section{padding:100px clamp(22px,6vw,90px);max-width:1500px;margin:auto}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:40px;margin-bottom:44px}.section-heading h2{font-family:var(--serif);font-size:clamp(36px,4vw,52px);line-height:1.15;margin:0}.section-heading>p{max-width:430px;color:var(--muted);margin:0}.lesson-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.lesson-card{position:relative;display:flex;flex-direction:column;min-height:355px;background:var(--white);border:1px solid var(--line);border-radius:10px;padding:26px;transition:.25s;overflow:hidden}.lesson-card:hover{transform:translateY(-5px);box-shadow:0 16px 35px rgba(41,51,45,.09);border-color:#d1cabe}.lesson-number{position:absolute;right:18px;top:14px;color:#cec8bd;font-family:var(--serif);font-size:15px}.lesson-icon{display:grid;place-items:center;width:56px;height:56px;border-radius:50%;font-size:27px;margin-bottom:22px;background:#efe7d8}.lesson-icon.gold{background:#f3e7bd}.lesson-icon.clay{background:#ead8d0}.lesson-icon.sage{background:#dce6d9}.lesson-icon.rose{background:#efd9d7}.lesson-icon.ink{background:#dfe2df}.lesson-icon.sky{background:#dce8e9}.lesson-icon.red{background:#ead3ce}.lesson-card h3{font-family:var(--serif);font-size:24px;margin:0 0 10px}.lesson-card>p{color:var(--muted);font-size:14px;margin:0 0 22px}.meta{display:flex;gap:8px;margin-top:auto;margin-bottom:20px}.meta span{font-size:11px;text-transform:uppercase;letter-spacing:.06em;background:#f3f0ea;border-radius:20px;padding:5px 9px;color:#636c67}.lesson-card>a{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);padding-top:16px;color:var(--red);font-size:14px;font-weight:700;text-decoration:none}.lesson-card.featured{background:#2d3b34;color:#fff;border-color:#2d3b34}.lesson-card.featured p{color:#cad1cd}.lesson-card.featured .meta span{background:#405047;color:#e8ece9}.lesson-card.featured>a{color:#f5cfc6;border-color:#536057}.lesson-card.featured .lesson-number{color:#77827c}footer{margin:0 clamp(22px,6vw,90px);padding:30px 0 50px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:14px}
/* Lesson pages */
.lesson-page{background:#faf8f3}.lesson-shell{max-width:1160px;margin:auto;padding:55px 24px 100px}.back-link{display:inline-flex;gap:8px;color:var(--muted);text-decoration:none;font-size:14px;margin-bottom:42px}.lesson-intro{display:grid;grid-template-columns:1fr 300px;gap:70px;align-items:start}.lesson-kicker{display:flex;align-items:center;gap:12px;color:var(--red);text-transform:uppercase;font-size:12px;font-weight:700;letter-spacing:.12em}.lesson-intro h1{font-family:var(--serif);font-size:clamp(43px,6vw,72px);line-height:1.08;letter-spacing:-.04em;margin:18px 0}.lesson-summary{font-size:19px;color:var(--muted);max-width:680px}.lesson-facts{background:#fff;border:1px solid var(--line);border-radius:10px;padding:25px}.fact{display:flex;justify-content:space-between;gap:15px;padding:13px 0;border-bottom:1px solid var(--line);font-size:13px}.fact:last-child{border:0}.fact span:first-child{color:var(--muted)}.progress-note{margin:58px 0 28px;background:#f0e4d9;border-left:4px solid var(--red);padding:20px 23px;border-radius:0 6px 6px 0}.content-placeholder h2{font-family:var(--serif);font-size:30px;margin:0 0 20px}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.resource{min-height:145px;background:#fff;border:1px dashed #cfc7ba;border-radius:8px;padding:22px}.resource-icon{font-size:22px}.resource h3{margin:13px 0 3px;font-size:16px}.resource p{margin:0;color:var(--muted);font-size:13px}.phrase-list{margin-top:30px;display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.phrase-list span{background:#fff;border:1px solid var(--line);border-radius:6px;padding:10px 14px;font-size:14px}
@media(max-width:1050px){.lesson-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.site-header{height:66px}.header-link{display:none}.hero{min-height:650px;display:block}.hero-image{position:absolute;inset:0;background:linear-gradient(180deg,rgba(248,245,239,.97) 0%,rgba(248,245,239,.88) 47%,rgba(248,245,239,.18) 100%),url('assets/mandarin-study-hero.webp') 67% center/cover}.hero-copy{position:relative;padding:65px 25px}.section-heading{display:block}.section-heading>p{margin-top:18px}.lesson-grid{grid-template-columns:1fr}.lesson-card{min-height:320px}.lessons-section{padding-top:70px}footer{display:block}.lesson-intro{grid-template-columns:1fr;gap:30px}.resource-grid{grid-template-columns:1fr}.phrase-list{grid-template-columns:1fr}}

/* Complete lesson content */
.progress-note{display:flex;gap:14px;margin-bottom:34px}.progress-note strong{white-space:nowrap}.progress-note span{color:#655f58}.lesson-scene{margin:0 0 65px}.lesson-scene img{display:block;width:100%;height:min(46vw,480px);object-fit:cover;border-radius:12px}.lesson-scene figcaption{color:var(--muted);font-size:13px;margin-top:10px}.teaching-block{margin:0 0 65px}.teaching-block h2{margin-bottom:8px}.section-note{color:var(--muted);margin:0 0 22px}.language-list{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden}.language-row{display:grid;grid-template-columns:1.1fr 1.2fr 1.7fr;align-items:center;gap:18px;padding:18px 22px;border-bottom:1px solid var(--line)}.language-row:last-child{border:0}.language-row strong{font-family:var(--serif);font-size:22px}.pinyin{color:var(--red);font-weight:600}.meaning{color:var(--muted)}.sentences .language-row strong{font-size:18px}.practice-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px}.dialogue-card,.practice-card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:28px;margin:0}.dialogue-line{display:grid;grid-template-columns:34px 1fr;gap:12px;margin:20px 0}.dialogue-line>b{display:grid;place-items:center;width:30px;height:30px;background:var(--sage);border-radius:50%;font-size:12px}.dialogue-line div{display:flex;flex-direction:column}.dialogue-line div strong{font-family:var(--serif);font-size:17px}.dialogue-line div span{color:var(--red);font-size:13px}.practice-card ol{padding-left:20px;color:var(--muted)}.practice-card li{margin:10px 0}.complete-button{width:100%;border:0;border-radius:6px;padding:14px 16px;background:var(--red);color:#fff;font:600 14px var(--sans);cursor:pointer;margin-top:12px}.complete-button.done{background:#456653}.complete-message{color:#456653;font-size:13px;margin-bottom:0;text-align:center}
@media(max-width:760px){.progress-note{display:block}.progress-note strong{display:block;margin-bottom:5px}.lesson-scene img{height:58vw}.language-row{grid-template-columns:1fr 1fr;gap:4px 12px;padding:15px}.language-row .meaning{grid-column:1/3}.practice-layout{grid-template-columns:1fr}.dialogue-card,.practice-card{padding:22px}}