/* Levels 31–60: autumn field journal based directly on the approved references. */
.sentence-autumn-lesson {
  --autumn-ink:#173f68;--autumn-copy:#513a2d;--autumn-copper:#c56731;--autumn-green:#466947;--autumn-paper:#fffaf0;--autumn-line:#dfc69b;
  position:relative;isolation:isolate;overflow:hidden;padding-bottom:34px;color:var(--autumn-copy);background:#f7ecd8;box-shadow:0 24px 68px rgba(72,48,33,.18)
}
.sentence-autumn-lesson::before{content:"";position:absolute;z-index:-2;inset:0 0 auto;height:382px;background:linear-gradient(90deg,rgba(255,250,239,.98) 0%,rgba(255,248,232,.88) 29%,rgba(255,246,226,.14) 58%,rgba(255,246,226,.03)),linear-gradient(0deg,#f7ecd8 0%,transparent 21%),url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-header-v4.webp") center 45%/cover no-repeat}
.sentence-autumn-lesson::after{content:"";position:absolute;z-index:-1;inset:292px 0 0;pointer-events:none;background:radial-gradient(circle at 4% 8%,rgba(190,91,39,.14),transparent 19%),radial-gradient(circle at 96% 28%,rgba(201,119,53,.12),transparent 20%),linear-gradient(90deg,rgba(139,79,38,.055) 1px,transparent 1px) 0 0/72px 72px,linear-gradient(rgba(139,79,38,.04) 1px,transparent 1px) 0 0/72px 72px}
.sentence-autumn-lesson .lesson-topbar,.sentence-autumn-lesson .lesson-title-row,.sentence-autumn-lesson .lesson-stepper,.sentence-autumn-lesson .lesson-content{position:relative;z-index:1;margin-left:clamp(24px,4vw,64px);margin-right:clamp(24px,4vw,64px)}
.sentence-autumn-lesson .lesson-topbar{padding-top:19px}.sentence-autumn-lesson .lesson-topbar .text-button{color:#43281e;font-weight:850;text-shadow:0 1px 2px rgba(255,250,239,.9)}
.sentence-autumn-lesson .lesson-title-row{min-height:158px;margin-top:14px;margin-bottom:12px;align-items:center}
.sentence-autumn-lesson .lesson-title-row h1{max-width:56%;color:#261d1a;font:600 clamp(38px,4vw,58px)/1.08 Georgia,"Times New Roman",serif;white-space:nowrap;word-break:keep-all;text-shadow:0 2px 5px rgba(255,250,239,.86)}
.sentence-autumn-lesson [data-lesson-kicker]{max-width:55%;color:#78422d;font-family:Georgia,"Times New Roman",serif;letter-spacing:.16em;text-shadow:0 1px 2px #fff8ea}
.sentence-autumn-lesson .seaside-level-badge:not([hidden]){display:inline-flex;align-items:center;gap:10px;margin-top:13px;border:1px solid #c8b27d;border-radius:999px;padding:9px 18px;color:#332b21;background:linear-gradient(115deg,rgba(255,253,240,.97),rgba(227,220,178,.96));box-shadow:0 5px 12px rgba(69,45,30,.17),inset 0 1px #fff;font:700 12px Georgia,"Times New Roman",serif;letter-spacing:.1em}
.sentence-autumn-lesson .seaside-level-badge::before{content:"";width:25px;height:25px;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;transform:rotate(-18deg)}
.sentence-autumn-lesson .bookmark-library-button{border:1px solid #ceb58b;color:#3f3025;background:rgba(255,252,243,.95);box-shadow:0 8px 22px rgba(75,49,30,.15);backdrop-filter:blur(7px)}

/* Four-stage reference navigation. */
.sentence-autumn-lesson .lesson-stepper{gap:15px}.sentence-autumn-lesson .lesson-stepper::before{content:"";position:absolute;z-index:-1;top:50%;left:4%;right:4%;border-top:2px dashed rgba(142,76,41,.52)}
.sentence-autumn-lesson .lesson-stepper button{min-height:90px;border:1px solid #d4bf9b;border-radius:16px;padding:12px 17px;color:#3f3128;background:rgba(255,252,244,.94);box-shadow:0 8px 18px rgba(76,48,31,.12),inset 0 1px #fff;font-family:Georgia,"Times New Roman",serif;backdrop-filter:blur(6px);transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease,background .22s ease}
.sentence-autumn-lesson .lesson-stepper button:hover{transform:translateY(-3px);box-shadow:0 13px 24px rgba(76,48,31,.18),inset 0 1px #fff}
.sentence-autumn-lesson .lesson-stepper button[aria-current="step"]{border:2px solid #cc6c32;color:#2f251f;background:rgba(255,248,231,.98);box-shadow:0 8px 20px rgba(139,68,33,.18),inset 0 0 0 1px rgba(255,255,255,.8)}
.sentence-autumn-lesson .lesson-stepper button>span{width:46px;height:46px;color:#4c2f20;background:radial-gradient(circle at 38% 30%,#f4cf96,#b96331 72%);box-shadow:inset 0 0 0 3px rgba(255,239,204,.7),0 2px 5px rgba(80,44,24,.2);font:700 20px Georgia,serif}
.sentence-autumn-lesson .lesson-stepper button.is-complete>span{color:#fff;background:#3f7a58;box-shadow:inset 0 0 0 3px rgba(204,230,205,.48)}
.sentence-autumn-lesson .lesson-stepper strong{font-size:17px}.sentence-autumn-lesson .lesson-stepper small{margin-top:3px;color:#5e5146;font-size:11px}

/* Ring-bound parchment shared by all four pages. */
.sentence-autumn-lesson .lesson-content{margin-top:17px}
.sentence-autumn-lesson .info-page,.sentence-autumn-lesson .exercise-page{position:relative;overflow:hidden;border:1px solid #cfb58d;border-radius:21px;padding:clamp(31px,4vw,55px) clamp(27px,4.7vw,72px);background:radial-gradient(circle at 96% 3%,rgba(218,155,73,.15),transparent 25%),repeating-linear-gradient(0deg,rgba(146,105,69,.028) 0 1px,transparent 1px 39px),#fffaf0;box-shadow:0 18px 42px rgba(67,45,34,.15),inset 0 1px rgba(255,255,255,.9)}
.sentence-autumn-lesson .info-page::before,.sentence-autumn-lesson .exercise-page::before{content:"";position:absolute;top:0;bottom:0;left:0;width:22px;background:radial-gradient(circle at 45% 44px,#39261d 0 4px,#b9814e 5px 9px,transparent 10px) 0 0/22px 58px repeat-y,linear-gradient(90deg,#84512e,#d0a069 47%,#7b4829 53%,#b27a45);box-shadow:4px 0 9px rgba(77,46,26,.2)}
.sentence-autumn-lesson .info-page::after,.sentence-autumn-lesson .exercise-page::after{content:"";position:absolute;top:24px;right:32px;width:95px;height:95px;pointer-events:none;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;opacity:.31;transform:rotate(14deg)}
.sentence-autumn-lesson .info-page-header{position:relative;max-width:calc(100% - 120px);min-height:0;padding:0 0 22px;border:0;border-bottom:2px solid #cba66e;border-radius:0;background:none;box-shadow:none}
.sentence-autumn-lesson .info-page-header::after{content:"";position:absolute;left:0;bottom:-6px;width:112px;height:10px;background:radial-gradient(ellipse,#ad6c35 0 34%,transparent 38%) 0 0/18px 10px repeat-x}
.sentence-autumn-lesson .info-page-header .page-label,.sentence-autumn-lesson .exercise-header .eyebrow{color:#8b4a2d;font:700 12px Georgia,"Times New Roman",serif;letter-spacing:.16em}
.sentence-autumn-lesson .info-page-header h2,.sentence-autumn-lesson .exercise-header h2{margin:8px 0 7px;color:#271f1c;font-family:Georgia,"Times New Roman",serif;text-wrap:balance}.sentence-autumn-lesson .info-page-header p,.sentence-autumn-lesson .exercise-header p{color:#5f4a3b}

/* Page 1 — formula and examples. */
.sentence-autumn-lesson .seaside-formula-page .formula-card{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:17px;margin-top:27px;border:0;padding:0;background:none;box-shadow:none}
.sentence-autumn-lesson .formula-label{grid-column:1/-1;width:fit-content;margin-bottom:-18px;position:relative;z-index:1;border-radius:8px 8px 2px 2px;padding:9px 18px;color:#fff8e8;background:#5c744c;box-shadow:0 3px 0 #364d35;font:700 12px Georgia,serif;letter-spacing:.1em}
.sentence-autumn-lesson .formula-display{grid-column:1/-1;margin:0;border:1px solid #c9ae7e;border-left:10px solid #758660;border-radius:7px 17px 17px 7px;padding:26px 30px;color:#3e2c25;background:linear-gradient(115deg,#edf2df,#fff9e8 68%);box-shadow:0 9px 19px rgba(77,50,33,.1);font-family:Georgia,"Times New Roman",serif;font-weight:600}
.sentence-autumn-lesson .formula-display p+p{margin-top:17px;border-top:1px solid #d3d9bb;padding-top:17px}.sentence-autumn-lesson .formula-display small{color:#6e7252}
.sentence-autumn-lesson .example-block{position:relative;min-width:0;margin:0;border:1px solid #d8bd93;border-top:6px solid #c56a37;border-radius:15px;padding:22px 24px;background:#fffdf7;box-shadow:0 8px 17px rgba(75,47,28,.08)}
.sentence-autumn-lesson .example-block::after{content:"";position:absolute;right:12px;bottom:10px;width:36px;height:36px;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;opacity:.25;transform:rotate(24deg)}
.sentence-autumn-lesson .formula-card>.example-block:only-of-type{grid-column:1/-1}
.sentence-autumn-lesson .example-block strong{color:#a14e2b;font-family:Georgia,serif}.sentence-autumn-lesson .example-block p{color:#463129;font-family:Georgia,"Times New Roman",serif}.sentence-autumn-lesson .example-block p:first-of-type{font-size:clamp(19px,2vw,26px)}
.sentence-autumn-lesson .meaning-block{grid-column:1/-1;margin:2px 0 0;border:1px solid #c5d1ae;border-radius:13px;padding:18px 23px;background:#edf3dd}.sentence-autumn-lesson .meaning-block strong{color:#557044}

/* Page 2 — horizontal benefit rows with leaf markers. */
.sentence-autumn-lesson .benefit-list{display:grid;grid-template-columns:1fr;gap:12px;margin-top:27px}.sentence-autumn-lesson .benefit-list::before{display:none}
.sentence-autumn-lesson .benefit-card,.sentence-autumn-lesson .benefit-card:nth-child(even){position:relative;display:grid;grid-template-columns:78px minmax(0,1fr);align-items:center;gap:18px;min-height:90px;margin:0;border:1px solid #d9bf97;border-radius:17px;padding:14px 70px 14px 17px;background:rgba(255,253,247,.92);box-shadow:0 5px 13px rgba(77,48,31,.06)}
.sentence-autumn-lesson .benefit-card::after{content:"";position:absolute;right:18px;width:37px;height:37px;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;opacity:.82;transform:rotate(var(--leaf-angle,12deg))}.sentence-autumn-lesson .benefit-card:nth-child(2n){--leaf-angle:-20deg;background:rgba(248,248,234,.95)}.sentence-autumn-lesson .benefit-card:nth-child(3n){--leaf-angle:31deg}
.sentence-autumn-lesson .benefit-card>span{display:grid;place-items:center;width:68px;height:68px;border:0;border-radius:0;color:#fff9ea;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;box-shadow:none;text-shadow:0 1px 3px #6d3c22;font:700 19px Georgia,serif}.sentence-autumn-lesson .benefit-card:nth-child(even)>span{filter:hue-rotate(52deg) saturate(.62)}
.sentence-autumn-lesson .benefit-card .chinese{color:#2f2924;font:700 20px/1.35 Georgia,"Times New Roman",serif}.sentence-autumn-lesson .benefit-card .english{margin-top:2px;color:#5d5147;font:16px/1.35 Georgia,"Times New Roman",serif}

/* Page 3 — numbered paper rule strips. */
.sentence-autumn-lesson .rule-list{display:grid;grid-template-columns:1fr;gap:12px;margin-top:27px}.sentence-autumn-lesson .rule-card{position:relative;display:grid;grid-template-columns:58px minmax(0,1fr);align-items:start;gap:19px;border:1px solid #d8bf99;border-radius:9px 17px 17px 9px;padding:18px 62px 18px 15px;background:linear-gradient(90deg,#fffdf6,#fbf5e9);box-shadow:0 5px 13px rgba(75,48,31,.07)}
.sentence-autumn-lesson .rule-card:nth-child(even){background:linear-gradient(90deg,#f1f1dc,#f9f7e9)}.sentence-autumn-lesson .rule-card::before{content:"";position:absolute;top:11px;right:15px;width:34px;height:34px;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;opacity:.33;transform:rotate(19deg)}.sentence-autumn-lesson .rule-card::after{display:none}.sentence-autumn-lesson .rule-card .seaside-anchor{display:none}
.sentence-autumn-lesson .rule-card>span{display:grid;place-items:center;width:58px;height:58px;border-radius:7px;color:#fff9e8;background:#b66a37;box-shadow:0 3px 0 #7d432a;font:700 20px Georgia,serif}.sentence-autumn-lesson .rule-card:nth-child(even)>span{background:#6f7d50;box-shadow-color:#465737}
.sentence-autumn-lesson .rule-card .chinese{color:#264e79;font:700 19px/1.35 Georgia,"Times New Roman",serif}.sentence-autumn-lesson .rule-card .english{color:#4e5c64;font-family:Georgia,"Times New Roman",serif}.sentence-autumn-lesson .rule-card .examples{display:flex;flex-wrap:wrap;gap:6px;margin-top:9px}.sentence-autumn-lesson .rule-card .examples code{color:#355d3b;background:#e8f0d7}

/* Page 4 — reference-style parchment question cards. */
.sentence-autumn-lesson .exercise-header{position:relative;border:0;border-bottom:2px solid #c9aa78;border-radius:0;padding:0 0 23px;background:none}.sentence-autumn-lesson .exercise-header-top{max-width:calc(100% - 100px)}
.sentence-autumn-lesson .exercise-progress{height:12px;border:1px solid #c6ad85;background:#eadfc9}.sentence-autumn-lesson .exercise-progress>span{background:linear-gradient(90deg,#d48b41,#66845b)}
.sentence-autumn-lesson .question-list{gap:21px}.sentence-autumn-lesson .question-card{position:relative;overflow:visible;margin:0;border:1px solid #dcc6a5;border-radius:8px 20px 20px 8px;padding:25px 28px 23px 38px;background:radial-gradient(circle at 98% 10%,rgba(215,145,61,.11),transparent 23%),repeating-linear-gradient(0deg,transparent 0 35px,rgba(99,141,161,.1) 36px,transparent 37px),#fffaf0;box-shadow:0 9px 22px rgba(78,50,32,.1)}
.sentence-autumn-lesson .question-card::before{content:"";position:absolute;top:32px;left:13px;bottom:22px;width:2px;border-radius:2px;background:rgba(202,98,64,.32)}.sentence-autumn-lesson .question-card::after{content:"";position:absolute;right:16px;bottom:16px;width:46px;height:46px;pointer-events:none;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-leaf.svg") center/contain no-repeat;opacity:.35;transform:rotate(24deg)}.sentence-autumn-lesson .question-card:nth-child(3n+2)::after{right:auto;left:13px;transform:rotate(-19deg);opacity:.22}
.sentence-autumn-lesson .question-number{display:inline-block;margin-left:-10px;border:1px solid #dabd91;border-radius:4px 11px 11px 4px;padding:7px 13px;color:#704125;background:linear-gradient(100deg,#ead0a3,#f6e6c8);box-shadow:0 2px 0 #c39a68;font-family:Georgia,"Times New Roman",serif}.sentence-autumn-lesson .question-prompt .english{color:#173f68;font-family:Georgia,"Times New Roman",serif}.sentence-autumn-lesson .question-prompt .chinese{color:#526d84}
.sentence-autumn-lesson .answer-input{border-color:#9bb1cc;background:rgba(255,255,255,.9)}.sentence-autumn-lesson .answer-input:focus{border-color:#c36a35;box-shadow:0 0 0 4px rgba(195,106,53,.13)}
.sentence-autumn-lesson .lesson-navigation .primary-button,body.has-sentence-autumn-lesson>.exercise-actions .primary-button{border-color:#28472f;color:#fff;background:linear-gradient(145deg,#4d6647,#283f2d);box-shadow:0 5px 0 #1d3022,0 9px 17px rgba(43,61,40,.17)}.sentence-autumn-lesson .lesson-navigation .secondary-button{border-color:#d1b68f;color:#4c3428;background:#fffaf0}
body.has-sentence-autumn-lesson>.exercise-actions[data-floating-exercise-actions]{border-color:#d2b58c;color:#583926;background:rgba(255,249,234,.98);box-shadow:0 12px 42px rgba(73,45,30,.24)}body.has-sentence-autumn-lesson>.exercise-actions .exercise-action-copy{color:#72533d}

@media(prefers-reduced-motion:reduce){.sentence-autumn-lesson .lesson-stepper button{transition:none}.sentence-autumn-lesson .lesson-stepper button:hover{transform:none}}
@media(max-width:850px){.sentence-autumn-lesson::before{height:398px;background-position:center,center,61% 47%}.sentence-autumn-lesson .lesson-title-row h1{max-width:62%}.sentence-autumn-lesson .lesson-stepper{grid-template-columns:repeat(2,minmax(0,1fr))}.sentence-autumn-lesson .lesson-stepper::before{display:none}}
@media(max-width:600px){
 .sentence-autumn-lesson{padding-bottom:22px}.sentence-autumn-lesson::before{height:362px;background:linear-gradient(90deg,rgba(255,250,239,.98),rgba(255,248,232,.78) 70%,rgba(255,246,226,.18)),linear-gradient(0deg,#f7ecd8,transparent 24%),url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-header-v4.webp") 67% 44%/auto 362px no-repeat}
 .sentence-autumn-lesson .lesson-topbar,.sentence-autumn-lesson .lesson-title-row,.sentence-autumn-lesson .lesson-stepper,.sentence-autumn-lesson .lesson-content{margin-left:14px;margin-right:14px}.sentence-autumn-lesson .lesson-title-row{min-height:176px;margin-top:5px;align-items:flex-start}.sentence-autumn-lesson .lesson-title-row h1{max-width:90%;font-size:clamp(31px,9vw,45px);white-space:normal}.sentence-autumn-lesson [data-lesson-kicker]{max-width:88%;font-size:10px}.sentence-autumn-lesson .bookmark-library-button{min-height:38px}
 .sentence-autumn-lesson .lesson-stepper{gap:8px}.sentence-autumn-lesson .lesson-stepper button{min-height:73px;padding:8px}.sentence-autumn-lesson .lesson-stepper button>span{width:34px;height:34px;font-size:16px}.sentence-autumn-lesson .lesson-stepper strong{font-size:13px}.sentence-autumn-lesson .lesson-stepper small{font-size:10px}
 .sentence-autumn-lesson .info-page,.sentence-autumn-lesson .exercise-page{padding:27px 15px 28px 31px}.sentence-autumn-lesson .info-page::before,.sentence-autumn-lesson .exercise-page::before{width:16px;background-size:16px 50px,auto}.sentence-autumn-lesson .info-page::after,.sentence-autumn-lesson .exercise-page::after{right:9px;width:48px;height:48px}.sentence-autumn-lesson .info-page-header{max-width:calc(100% - 36px)}
 .sentence-autumn-lesson .seaside-formula-page .formula-card{grid-template-columns:1fr}.sentence-autumn-lesson .formula-label,.sentence-autumn-lesson .formula-display,.sentence-autumn-lesson .meaning-block{grid-column:1}.sentence-autumn-lesson .formula-display{border-left-width:6px;padding:20px 14px}.sentence-autumn-lesson .example-block{padding:18px 14px}
 .sentence-autumn-lesson .benefit-card,.sentence-autumn-lesson .benefit-card:nth-child(even){grid-template-columns:54px minmax(0,1fr);gap:10px;padding:12px 40px 12px 10px}.sentence-autumn-lesson .benefit-card>span{width:50px;height:50px;font-size:15px}.sentence-autumn-lesson .benefit-card::after{right:8px;width:26px;height:26px}.sentence-autumn-lesson .benefit-card .chinese{font-size:16px}.sentence-autumn-lesson .benefit-card .english{font-size:14px}
 .sentence-autumn-lesson .rule-card{grid-template-columns:42px minmax(0,1fr);gap:10px;padding:14px 38px 14px 10px}.sentence-autumn-lesson .rule-card>span{width:42px;height:42px;font-size:16px}.sentence-autumn-lesson .rule-card .chinese{font-size:16px}.sentence-autumn-lesson .exercise-header-top{max-width:100%}.sentence-autumn-lesson .question-card{padding:19px 12px 18px 28px}.sentence-autumn-lesson .question-card::after{width:30px;height:30px;opacity:.2}
}

/* Illustrated journal details from the supplied autumn references. */
.sentence-autumn-lesson{
 --autumn-leaf:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/maple-leaf.webp");
 --autumn-sprig:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/acorn-leaves.webp");
 --autumn-branch:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/botanical-branch.webp");
 background:#6b482e;
}
.sentence-autumn-lesson::before{background-image:linear-gradient(90deg,rgba(255,250,239,.94) 0%,rgba(255,248,232,.78) 24%,rgba(255,246,226,.06) 51%,transparent 68%),linear-gradient(0deg,#bd9061 0%,transparent 16%),url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-header-v4.webp")}
.sentence-autumn-lesson::after{inset:285px 0 0;background:var(--autumn-branch) -85px 15px/245px auto no-repeat,var(--autumn-sprig) calc(100% + 25px) 360px/180px auto no-repeat,repeating-linear-gradient(177deg,transparent 0 100px,rgba(31,18,12,.17) 102px 106px,rgba(255,222,172,.1) 108px 110px,transparent 112px 210px),repeating-linear-gradient(90deg,rgba(38,21,14,.12) 0 1px,transparent 2px 82px),linear-gradient(90deg,#61402b,#93613b 24%,#70492e 62%,#5a3928);opacity:1}
.sentence-autumn-lesson .lesson-topbar .text-button{border:1px solid #c7aa80;border-radius:999px;padding:10px 19px;background:rgba(255,250,239,.94);box-shadow:0 5px 14px rgba(59,37,23,.17)}
.sentence-autumn-lesson .bookmark-library-button{border-radius:999px;padding:11px 21px}
.sentence-autumn-lesson .seaside-level-badge:not([hidden]){border-radius:6px;padding:8px 14px;color:#fff8de;background:linear-gradient(115deg,#39543a,#6a7144 65%,#364a34);box-shadow:0 4px 0 rgba(57,44,28,.3),0 7px 14px rgba(44,34,24,.17);font-size:13px;letter-spacing:.07em}
.sentence-autumn-lesson .seaside-level-badge::before{width:23px;height:23px;background-image:var(--autumn-leaf)}
.sentence-autumn-lesson .lesson-stepper{gap:8px}
.sentence-autumn-lesson .lesson-stepper button{position:relative;min-height:82px;border-radius:11px;padding:12px 15px;background:linear-gradient(130deg,rgba(255,254,247,.97),rgba(250,239,218,.95));box-shadow:0 4px 0 rgba(91,62,39,.17),0 10px 15px rgba(53,35,22,.11)}
.sentence-autumn-lesson .lesson-stepper button[aria-current="step"]{background:linear-gradient(115deg,#fffaf0,#f8e6c4);box-shadow:0 4px 0 #a96131,0 11px 20px rgba(81,43,25,.22)}
.sentence-autumn-lesson .lesson-stepper button>span{width:45px;height:45px;color:#fff4de;background:radial-gradient(circle at 30% 20%,#d98d4c,#87421e 75%);box-shadow:inset 0 0 0 2px rgba(255,226,169,.6),0 3px 5px rgba(70,37,20,.27)}
.sentence-autumn-lesson .lesson-stepper button.is-complete>span{font-size:0;background:radial-gradient(circle at 30% 20%,#608664,#2f6448 77%)}
.sentence-autumn-lesson .lesson-stepper button.is-complete>span::after{content:"✓";font:700 23px Georgia,serif}
.sentence-autumn-lesson .lesson-stepper strong{font-size:17px}.sentence-autumn-lesson .lesson-stepper small{color:#6c5944;font-size:12px}
.sentence-autumn-lesson .lesson-content{margin-top:15px}
.sentence-autumn-lesson .info-page,.sentence-autumn-lesson .exercise-page{overflow:visible;border:2px solid #c19b6c;border-left:8px solid #c89e6a;border-radius:25px;padding-bottom:43px;background:radial-gradient(circle at 15% 6%,rgba(255,255,255,.79),transparent 32%),radial-gradient(circle at 88% 89%,rgba(220,166,89,.13),transparent 39%),repeating-linear-gradient(0deg,rgba(129,88,49,.028) 0 1px,transparent 1px 31px),#fff8e9;box-shadow:0 0 0 5px rgba(248,227,188,.64),0 0 0 8px rgba(82,50,28,.29),0 22px 41px rgba(38,25,18,.36),inset 0 0 23px rgba(187,123,63,.11)}
.sentence-autumn-lesson .info-page::before,.sentence-autumn-lesson .exercise-page::before{z-index:2;left:-42px;top:2px;bottom:2px;width:64px;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/seaside/notebook-ring.svg?v=2") left top/64px 96px repeat-y;box-shadow:none;pointer-events:none}
.sentence-autumn-lesson .info-page::after,.sentence-autumn-lesson .exercise-page::after{top:21px;right:25px;width:135px;height:126px;background-image:var(--autumn-branch);opacity:.25;transform:rotate(15deg)}
.sentence-autumn-lesson .info-page-header{max-width:none;min-height:0;border:0;padding:0 0 36px 0}
.sentence-autumn-lesson .info-page-header h2{position:relative;padding-left:57px;color:#1b2f50;font-size:clamp(30px,3.5vw,48px)}
.sentence-autumn-lesson .info-page-header h2::before{content:"";position:absolute;left:0;top:-5px;width:48px;height:48px;background:var(--autumn-leaf) center/contain no-repeat;transform:rotate(-18deg)}
.sentence-autumn-lesson .info-page-header::after{left:0;right:0;bottom:8px;width:auto;height:7px;background:repeating-linear-gradient(113deg,#9e6235 0 2px,#d9af73 2px 4px,#89542f 4px 5px,#c39157 5px 7px);border-top:1px solid #b4874b;border-bottom:1px solid #b4874b;border-radius:100%;box-shadow:0 1px 2px rgba(75,46,27,.18)}
.sentence-autumn-lesson .info-page-header::before{content:"";position:absolute;z-index:1;left:50%;bottom:-10px;width:69px;height:48px;background:var(--autumn-sprig) center/contain no-repeat;transform:translateX(-50%);pointer-events:none}
.sentence-autumn-lesson .benefit-list{gap:13px;margin-top:21px}
.sentence-autumn-lesson .benefit-card,.sentence-autumn-lesson .benefit-card:nth-child(even){grid-template-columns:84px minmax(0,1fr);gap:23px;min-height:112px;border:1px solid #d3ae7c;border-radius:17px;padding:16px 126px 16px 20px;background:linear-gradient(105deg,rgba(255,253,245,.97),rgba(250,242,224,.92));box-shadow:0 5px 10px rgba(82,47,27,.07),inset 0 1px #fff}
.sentence-autumn-lesson .benefit-card>span{width:79px;height:78px;background-image:var(--autumn-leaf);background-size:contain;font-size:25px;text-shadow:0 2px 4px #623219}
.sentence-autumn-lesson .benefit-card:nth-child(even)>span{filter:hue-rotate(71deg) saturate(.55) brightness(.77)}
.sentence-autumn-lesson .benefit-card>div{display:flex;flex-direction:column}
.sentence-autumn-lesson .benefit-card .english{order:-1;margin:0 0 4px;color:#173754;font:700 clamp(18px,1.7vw,23px)/1.3 Georgia,"Times New Roman",serif}
.sentence-autumn-lesson .benefit-card .chinese{color:#3a3027;font:500 clamp(15px,1.25vw,18px)/1.4 Georgia,"Times New Roman",serif}
.sentence-autumn-lesson .benefit-card::after{right:17px;width:88px;height:68px;background-image:var(--autumn-sprig);opacity:.94;transform:rotate(var(--leaf-angle,0deg))}
.sentence-autumn-lesson .rule-list{position:relative;gap:13px;padding-left:25px}.sentence-autumn-lesson .rule-list::before{content:"";position:absolute;left:9px;top:10px;bottom:10px;width:3px;border-radius:5px;background:linear-gradient(90deg,#714425,#b9864b,#704226)}
.sentence-autumn-lesson .rule-card{min-height:105px;grid-template-columns:62px minmax(0,1fr);gap:20px;border-color:#cdb38c;border-radius:7px 16px 16px 7px;padding:16px 80px 16px 14px;background:linear-gradient(100deg,#fffdf3,#f9ecd5);box-shadow:0 5px 10px rgba(76,47,25,.12),inset 0 1px #fff}
.sentence-autumn-lesson .rule-card:nth-child(even){background:linear-gradient(100deg,#f7f6e9,#f3edda)}
.sentence-autumn-lesson .rule-card>span,.sentence-autumn-lesson .rule-card:nth-child(even)>span{width:62px;height:62px;border:1px solid #ccb187;border-radius:4px;color:#442d21;background:linear-gradient(130deg,#fff8e9,#ead1a9);box-shadow:0 2px 4px rgba(79,49,25,.23);font-size:24px;transform:rotate(-3deg)}
.sentence-autumn-lesson .rule-card::before{right:11px;top:16px;width:64px;height:70px;background-image:var(--autumn-sprig);opacity:.72;transform:rotate(-12deg)}
.sentence-autumn-lesson .rule-card .chinese{font-size:clamp(18px,1.7vw,23px);line-height:1.4}
.sentence-autumn-lesson .rule-card .english{color:#475c65;font-size:16px}
.sentence-autumn-lesson .lesson-navigation{margin-top:30px}
.sentence-autumn-lesson .lesson-navigation .primary-button{min-width:224px;min-height:61px;border:1px solid #d7ccaa;border-radius:11px;font:600 21px Georgia,"Times New Roman",serif}
.sentence-autumn-lesson .lesson-navigation .primary-button::after{content:"Continue the Journey";display:block;margin-top:2px;font:400 12px Georgia,"Times New Roman",serif;letter-spacing:.03em}
.sentence-autumn-lesson .lesson-navigation .secondary-button{min-width:175px;min-height:58px;border-radius:11px;font:600 19px Georgia,"Times New Roman",serif}
.sentence-autumn-lesson .exercise-header{border-bottom-color:#c8a775;padding-bottom:26px}
.sentence-autumn-lesson .exercise-header::before{content:"";position:absolute;right:8px;top:0;width:140px;height:128px;background:var(--autumn-branch) center/contain no-repeat;opacity:.48;pointer-events:none}
.sentence-autumn-lesson .exercise-header h2{color:#1b3b62}
.sentence-autumn-lesson .question-list{gap:22px;margin-top:24px}
.sentence-autumn-lesson .question-card{border:1px solid #d9b988;border-radius:10px 18px 18px 10px;padding:26px 24px 24px 78px;background:linear-gradient(90deg,transparent 0 70px,rgba(208,107,72,.25) 71px,transparent 73px),repeating-linear-gradient(0deg,rgba(255,250,239,.96) 0 35px,rgba(106,151,176,.13) 36px,rgba(255,250,239,.96) 37px);box-shadow:0 8px 20px rgba(76,45,25,.15),inset 0 1px #fff}
.sentence-autumn-lesson .question-card::before{z-index:0;left:-19px;top:30px;bottom:10px;width:88px;background:var(--autumn-branch) center bottom/contain no-repeat;opacity:.82}
.sentence-autumn-lesson .question-card::after{right:14px;bottom:8px;width:48px;height:42px;background-image:var(--autumn-sprig);opacity:.48;transform:rotate(10deg)}
.sentence-autumn-lesson .question-number{position:relative;z-index:1;margin-left:-34px;border-color:#bd8755;border-radius:7px 3px 10px 3px;padding:8px 18px;color:#694021;background:linear-gradient(120deg,#f4d9ab,#e8bb80 52%,#f7e4c1);box-shadow:0 3px 0 #bc8d57,0 6px 8px rgba(70,42,22,.15);font-size:14px;transform:rotate(-3deg)}
.sentence-autumn-lesson .question-card-content,.sentence-autumn-lesson .question-card-actions{position:relative;z-index:1}
.sentence-autumn-lesson .question-card.is-correct{border-color:#8abc9b}.sentence-autumn-lesson .question-card.is-wrong{border-color:#d89988}
@media(max-width:850px){.sentence-autumn-lesson::after{background-size:150px auto,110px auto,auto,auto,auto}.sentence-autumn-lesson .benefit-card,.sentence-autumn-lesson .benefit-card:nth-child(even){padding-right:85px}.sentence-autumn-lesson .benefit-card::after{right:5px;width:68px;height:55px}.sentence-autumn-lesson .rule-card{padding-right:64px}.sentence-autumn-lesson .rule-card::before{width:50px;height:55px}}
@media(max-width:600px){
 .sentence-autumn-lesson::before{background-image:linear-gradient(90deg,rgba(255,250,239,.98),rgba(255,248,232,.76) 70%,rgba(255,246,226,.08)),linear-gradient(0deg,#bd9061,transparent 22%),url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-header-v4.webp");background-position:center,center,100% 44%}
 .sentence-autumn-lesson::after{inset:320px 0 0;background:repeating-linear-gradient(177deg,transparent 0 96px,rgba(31,18,12,.17) 98px 101px,transparent 103px 200px),linear-gradient(90deg,#61402b,#93613b 50%,#5a3928)}
 .sentence-autumn-lesson .lesson-topbar .text-button{padding:7px 10px;font-size:12px}
 .sentence-autumn-lesson .lesson-stepper button{min-height:70px;padding:7px}.sentence-autumn-lesson .lesson-stepper strong{font-size:12px}.sentence-autumn-lesson .lesson-stepper small{font-size:10px}
 .sentence-autumn-lesson .info-page,.sentence-autumn-lesson .exercise-page{border-left-width:5px;padding:25px 15px 28px 24px}
 .sentence-autumn-lesson .info-page::before,.sentence-autumn-lesson .exercise-page::before{left:-26px;width:40px;background-size:40px 73px}
 .sentence-autumn-lesson .info-page::after,.sentence-autumn-lesson .exercise-page::after{right:0;top:8px;width:55px;height:63px;opacity:.15}
 .sentence-autumn-lesson .info-page-header{max-width:none;padding-bottom:36px}.sentence-autumn-lesson .info-page-header h2{padding-left:34px;font-size:27px}.sentence-autumn-lesson .info-page-header h2::before{width:30px;height:30px;top:0}.sentence-autumn-lesson .info-page-header::before{width:48px;height:36px}
 .sentence-autumn-lesson .benefit-card,.sentence-autumn-lesson .benefit-card:nth-child(even){grid-template-columns:48px minmax(0,1fr);gap:8px;min-height:94px;padding:10px 35px 10px 7px}.sentence-autumn-lesson .benefit-card>span{width:50px;height:50px;font-size:16px}.sentence-autumn-lesson .benefit-card::after{right:0;width:35px;height:35px;opacity:.65}.sentence-autumn-lesson .benefit-card .english{font-size:15px}.sentence-autumn-lesson .benefit-card .chinese{font-size:13px}
 .sentence-autumn-lesson .rule-list{padding-left:0}.sentence-autumn-lesson .rule-list::before{display:none}.sentence-autumn-lesson .rule-card{grid-template-columns:38px minmax(0,1fr);gap:8px;min-height:0;padding:12px 25px 12px 8px}.sentence-autumn-lesson .rule-card>span,.sentence-autumn-lesson .rule-card:nth-child(even)>span{width:38px;height:38px;font-size:15px}.sentence-autumn-lesson .rule-card::before{right:0;width:30px;height:34px;opacity:.35}.sentence-autumn-lesson .rule-card .chinese{font-size:16px}.sentence-autumn-lesson .rule-card .english{font-size:13px}
 .sentence-autumn-lesson .lesson-navigation .primary-button,.sentence-autumn-lesson .lesson-navigation .secondary-button{width:100%;min-height:52px;font-size:17px}.sentence-autumn-lesson .lesson-navigation .primary-button::after{font-size:10px}
 .sentence-autumn-lesson .exercise-header::before{width:55px;height:55px;opacity:.25}
 .sentence-autumn-lesson .question-card{padding:17px 10px 18px 31px;background:linear-gradient(90deg,transparent 0 27px,rgba(208,107,72,.25) 28px,transparent 30px),repeating-linear-gradient(0deg,rgba(255,250,239,.96) 0 35px,rgba(106,151,176,.13) 36px,rgba(255,250,239,.96) 37px)}.sentence-autumn-lesson .question-card::before{left:-12px;top:42px;bottom:15px;width:39px;opacity:.45}.sentence-autumn-lesson .question-number{margin-left:-20px;padding:5px 9px;font-size:11px}
}

/* Reference refinement: a light forest setting, illustrated markers, and a signboard practice page. */
.sentence-autumn-lesson{background:#f6ecdc}
.sentence-autumn-lesson::before{background-image:linear-gradient(90deg,rgba(255,250,239,.95) 0%,rgba(255,248,232,.8) 25%,rgba(255,246,226,.04) 52%,transparent 68%),linear-gradient(0deg,#f6ecdc 0%,transparent 15%),url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/lesson-header-v4.webp")}
.sentence-autumn-lesson::after{inset:285px 0 0;background:var(--autumn-branch) -100px 35px/220px auto no-repeat,var(--autumn-leaf) calc(100% + 25px) 90px/130px auto no-repeat,radial-gradient(circle at 0 18%,rgba(229,167,94,.18),transparent 25%),radial-gradient(circle at 100% 64%,rgba(174,128,74,.12),transparent 26%),linear-gradient(90deg,#f1e3cd,#fff8ec 15%,#fff9ef 85%,#f0dec2);opacity:1}
.sentence-autumn-lesson .lesson-stepper button{border-color:#d2b586;border-radius:16px;background:linear-gradient(125deg,#fffdf5,#f8edda);box-shadow:0 6px 0 rgba(155,103,52,.14),0 12px 20px rgba(67,42,25,.1)}
.sentence-autumn-lesson .lesson-stepper button[aria-current="step"]{border-color:#aa6738;background:linear-gradient(120deg,#fff8e8,#f3dfbb);box-shadow:0 6px 0 rgba(137,80,37,.32),0 13px 23px rgba(69,38,21,.15)}
.sentence-autumn-lesson .lesson-stepper button>span,.sentence-autumn-lesson .lesson-stepper button.is-complete>span{flex:none;width:59px;height:59px;border:0;border-radius:0;color:#493122;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/step-medallion.webp") center/contain no-repeat;box-shadow:none;text-shadow:0 1px rgba(255,248,221,.9);font:700 22px Georgia,serif}
.sentence-autumn-lesson .lesson-stepper button.is-complete>span{font-size:0;filter:saturate(.72)}
.sentence-autumn-lesson .lesson-stepper button.is-complete>span::after{color:#315b3c;font:700 28px Georgia,serif}
.sentence-autumn-lesson .seaside-formula-page{background:radial-gradient(circle at 95% 2%,rgba(225,169,86,.18),transparent 25%),radial-gradient(circle at 5% 85%,rgba(140,157,91,.1),transparent 23%),#fff9ec}
.sentence-autumn-lesson .seaside-formula-page .formula-card{position:relative;gap:20px}
.sentence-autumn-lesson .seaside-formula-page .formula-card::after{content:"";position:absolute;z-index:0;right:-24px;bottom:31px;width:118px;height:120px;pointer-events:none;background:var(--autumn-branch) center/contain no-repeat;opacity:.3}
.sentence-autumn-lesson .formula-card>*{position:relative;z-index:1}
.sentence-autumn-lesson .formula-display{position:relative;overflow:hidden;border:1px solid #c8a56e;border-left:9px solid #75855c;border-radius:16px;padding:28px 190px 28px 29px;background:linear-gradient(105deg,#fffdf3,#f4efd9);box-shadow:0 10px 21px rgba(84,53,29,.11),inset 0 0 0 5px rgba(255,255,255,.55)}
.sentence-autumn-lesson .formula-display::after{content:"";position:absolute;right:9px;bottom:4px;width:155px;height:170px;pointer-events:none;background:var(--autumn-branch) center/contain no-repeat;opacity:.65}
.sentence-autumn-lesson .formula-card.single-example>.example-block{grid-column:1/-1;padding:24px 150px 24px 30px;background:linear-gradient(105deg,#fffdf7,#fbf0da)}
.sentence-autumn-lesson .formula-card.single-example>.example-block::after{right:19px;bottom:9px;width:112px;height:100px;background-image:var(--autumn-sprig);opacity:.88;transform:none}
.sentence-autumn-lesson .meaning-block{border-color:#b9c59f;background:linear-gradient(100deg,#f1f5e5,#e7efdc)}
.sentence-autumn-lesson .rule-list{padding-left:20px}.sentence-autumn-lesson .rule-list::before{left:7px;width:4px;background:linear-gradient(90deg,#6f482a,#ba8b52,#6b4229)}
.sentence-autumn-lesson .rule-card{grid-template-columns:108px minmax(0,1fr);min-height:148px;align-items:center;gap:19px;padding:13px 78px 13px 7px;border-radius:15px;background:linear-gradient(100deg,#fffdf5,#f6ead5)}
.sentence-autumn-lesson .rule-card:nth-child(even){background:linear-gradient(100deg,#f7f6e7,#f3ecd8)}
.sentence-autumn-lesson .rule-card>span,.sentence-autumn-lesson .rule-card:nth-child(even)>span{width:108px;height:118px;border:0;border-radius:0;color:#573723;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/rule-memo-maple.webp") center/contain no-repeat;box-shadow:none;text-shadow:0 1px #fff8ea;font:700 23px Georgia,serif;transform:none;padding:28px 0 0 28px}
.sentence-autumn-lesson .rule-card:nth-child(5n+2)>span{background-image:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/rule-memo-pinecone.webp")}
.sentence-autumn-lesson .rule-card:nth-child(5n+3)>span{background-image:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/rule-memo-berries.webp")}
.sentence-autumn-lesson .rule-card:nth-child(5n+4)>span{background-image:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/rule-memo-ginkgo.webp")}
.sentence-autumn-lesson .rule-card:nth-child(5n+5)>span{background-image:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/rule-memo-oak.webp")}
.sentence-autumn-lesson .rule-card::before{background-image:var(--autumn-leaf);opacity:.26}
.sentence-autumn-lesson .exercise-page{border:12px solid #9c6838;border-radius:22px;padding:35px clamp(20px,3vw,48px) 44px;background:radial-gradient(circle at 50% 8%,rgba(255,255,255,.85),transparent 28%),linear-gradient(90deg,rgba(133,81,36,.1),transparent 3%,transparent 97%,rgba(133,81,36,.1)),#f9eed8;box-shadow:0 0 0 3px #5b3b25,0 0 0 8px #d7ae71,0 18px 38px rgba(67,42,22,.2),inset 0 0 0 3px #e8ca95,inset 0 0 25px rgba(90,55,30,.12)}
.sentence-autumn-lesson .exercise-page::before{display:none}
.sentence-autumn-lesson .exercise-page::after{background-image:var(--autumn-branch);right:9px;top:22px;opacity:.24}
.sentence-autumn-lesson .exercise-header{min-height:255px;border:0;padding:47px clamp(32px,5vw,80px) 45px;background:url("https://edmund-site-assets.edmundeducation.workers.dev/site-assets/v1/assets/sentence-structure/autumn/wooden-sign.webp") center/100% 128% no-repeat;color:#3d281a}
.sentence-autumn-lesson .exercise-header::before{display:none}
.sentence-autumn-lesson .exercise-header h2,.sentence-autumn-lesson .exercise-header .eyebrow,.sentence-autumn-lesson .exercise-header p,.sentence-autumn-lesson .exercise-progress-label{color:#402a1c;text-shadow:0 1px rgba(255,221,158,.45)}
.sentence-autumn-lesson .exercise-header .eyebrow{margin-left:28px}
.sentence-autumn-lesson .exercise-progress-label span{border-radius:999px;padding:2px 8px;background:rgba(255,239,204,.82);text-shadow:none}
.sentence-autumn-lesson .exercise-progress{background:rgba(255,239,203,.65);border-color:#8b6239}
.sentence-autumn-lesson .question-card{border:1px solid #d3af7d;border-radius:17px;padding:26px 28px 24px 34px;background:radial-gradient(circle at 95% 10%,rgba(222,169,91,.15),transparent 30%),linear-gradient(110deg,#fffdf6,#f8ebd5);box-shadow:0 9px 20px rgba(87,55,31,.13),inset 0 0 0 4px rgba(255,255,255,.46)}
.sentence-autumn-lesson .question-card::before{left:auto;right:10px;top:auto;bottom:7px;width:80px;height:76px;background:var(--autumn-branch) center/contain no-repeat;opacity:.34}
.sentence-autumn-lesson .question-card::after{display:none}
.sentence-autumn-lesson .question-number{margin-left:0}
@media(max-width:850px){.sentence-autumn-lesson::after{background-size:155px auto,95px auto,auto,auto,auto}.sentence-autumn-lesson .formula-display{padding-right:125px}.sentence-autumn-lesson .formula-display::after{width:110px;height:125px;opacity:.4}.sentence-autumn-lesson .rule-card{grid-template-columns:82px minmax(0,1fr);min-height:125px;padding-right:38px}.sentence-autumn-lesson .rule-card>span,.sentence-autumn-lesson .rule-card:nth-child(even)>span{width:82px;height:94px;padding:22px 0 0 20px;font-size:19px}}
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