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auto}.art-shape{width:230px;height:175px;top:40px}.art-book{width:169px;height:118px;top:47%}.book-label{top:25px;left:20px}.book-label strong{font-size:13px}.art-card{left:2%;top:8%;width:130px;padding:12px}.card-sentence{font-size:14px}.art-sticker{width:68px;height:68px;font-size:12px;right:2%;bottom:18%}.art-plant{transform:scale(.8);transform-origin:bottom left;left:8%;bottom:11%}.art-caption{font-size:6px;bottom:1%}.art-pencil{top:72%;width:110px}.art-sun{width:54px;height:54px;right:9%;top:10px}.welcome-bottom{left:22px;right:22px;bottom:17px}.lesson-view{padding:21px 18px 28px}.lesson-topline{align-items:flex-start;gap:8px}.breadcrumbs{gap:5px;font-size:8px;flex-wrap:wrap}.lesson-meta{font-size:7px;gap:5px;white-space:nowrap}.difficulty{font-size:0}.difficulty>span{font-size:0}.lesson-heading{min-height:139px;margin-top:23px;padding:21px 18px}.lesson-heading h1{font-size:32px;letter-spacing:-1.7px}.lesson-heading-copy>p{font-size:9px;max-width:250px;line-height:1.65}.heading-illustration{width:80px;height:100px;margin-right:0}.sun-face{width:48px;height:48px;right:6px;top:5px;font-size:27px}.heading-cloud{left:-3px;top:28px;font-size:30px}.heading-ground{width:80px;height:32px;bottom:4px}.heading-sprout{font-size:27px;left:20px;bottom:11px}.lesson-tabs{gap:0;overflow-x:auto;scrollbar-width:none;margin:16px 0 20px}.lesson-tab{font-size:9px;padding:0 10px 10px}.lesson-tab>span{display:none}.lesson-layout{display:block}.lesson-aside{display:none}.section-heading h2{font-size:16px}.section-lead{font-size:10px}.lesson-section{margin-bottom:27px}.formula-line{gap:7px}.formula-label{width:89px;font-size:7px}.formula-tense{font-size:12px;min-width:55px}.formula-example{font-size:9px}.pattern-card{padding:10px}.pattern-card p{font-size:9px}.site-footer{font-size:8px}}@media(max-width:410px){.welcome-copy h1{font-size:43px}.lesson-heading{padding-left:14px;padding-right:12px}.lesson-heading h1{font-size:29px}.heading-illustration{width:68px}.breadcrumbs{max-width:65%}.lesson-meta{font-size:6px}.formula-card{padding-left:9px;padding-right:9px}.formula-line{gap:5px}.formula-label{width:79px;font-size:6px}.formula-tense{min-width:46px;font-size:11px}.formula-example{font-size:8px}.welcome-art{transform:scale(.96);transform-origin:top center}}
.lesson-notice{position:fixed;z-index:20;bottom:54px;left:50%;transform:translateX(-50%);max-width:min(420px,calc(100vw - 32px));padding:12px 18px;border:1px solid #dfe8db;border-radius:6px;background:#fff;color:#506a54;box-shadow:0 8px 25px #293e3018;font-size:11px;line-height:1.5}.lesson-notice[hidden]{display:none}
@media(max-width:740px){#lesson-nav{display:flex;flex-direction:column;gap:5px;overflow:visible}.nav-group:not(:first-child){display:block!important}.nav-items{overflow-x:auto;scrollbar-width:none;padding-bottom:2px}.nav-group:first-child .nav-items{margin-left:0}}

/* Rounded liquid-glass finish */
:root{--paper:#f4f3f8;--white:#fff;--ink:#211d2b;--muted:#7d788a;--green:#7541d8;--deep:#5225ad;--line:#e5e0ee;--mint:#f0ebfa;--peach:#f3edff;--gold:#a68afb;--serif:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--sans:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--heading:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
body{background:radial-gradient(ellipse at 83% 9%,#e8e3ff 0,transparent 34%),radial-gradient(ellipse at 66% 80%,#e5edff 0,transparent 33%),#f7f6fa;color:#25202f}
.topbar{background:rgba(255,255,255,.74);backdrop-filter:blur(22px) saturate(160%);-webkit-backdrop-filter:blur(22px) saturate(160%);border-color:#fff;box-shadow:0 5px 24px #30204a0a}
.brand-mark{background:linear-gradient(145deg,#994cff,#5321ba 68%,#242031);box-shadow:inset 1px 1px 2px #ffffff70,0 4px 10px #7441d43c;border-radius:9px}
.brand-light{color:#8b69c9}.topbar-link{color:#fff;background:linear-gradient(135deg,#9a4fff,#6431cc 66%,#3d2b76);border:1px solid #ffffff72;border-radius:999px;box-shadow:inset 0 1px #ffffff72,0 4px 12px #6931c839;padding:10px 17px}.topbar-link:hover{transform:translateY(-1px);box-shadow:inset 0 1px #ffffffa6,0 7px 16px #6931c844}
.app-shell{grid-template-columns:270px minmax(0,1fr)}.sidebar{background:rgba(255,255,255,.48);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-color:#fff;box-shadow:5px 0 28px #38265b08}
.sidebar-intro h2,.welcome-copy h1,.lesson-heading h1,.section-heading h2{color:#211d2b}.sidebar-intro p,.welcome-description{color:#777286}.progress-line{background:#e6e0ef}.progress-line span{background:linear-gradient(90deg,#ab63ff,#6941df,#74a8ff);box-shadow:0 0 10px #8453ee60}
.present-icon{background:linear-gradient(145deg,#f1ddff,#e7e5ff);color:#8543db}.past-icon{background:linear-gradient(145deg,#eee4ff,#e5eaff);color:#7750d8}.future-icon{background:linear-gradient(145deg,#e6e5ff,#deefff);color:#526bd5}
.nav-item{border-radius:10px;transition:transform .2s,background .2s,box-shadow .2s}.nav-item:hover{transform:translateX(3px);background:#fff;box-shadow:0 4px 13px #4c2a7610}.nav-item.active{color:#5c2ab0;background:linear-gradient(110deg,#f1e7ff,#e8e8ff 70%,#e8f1ff);box-shadow:inset 0 1px #fff,0 4px 13px #6532b214}.nav-item.active:before{background:#8b42ed;box-shadow:0 0 0 3px #dfcbff}
.group-heading{border-radius:10px}.group-heading:hover{background:#fff9}.sidebar-bottom{border-color:#fff}.leaf-icon{background:linear-gradient(145deg,#f0ddff,#e4eaff);color:#7743d4;border-radius:10px;box-shadow:inset 0 1px #fff}
.welcome-view{max-width:1120px}.welcome-kicker{color:#7756ae}.welcome-kicker span{color:#9b5bfa}.welcome-copy h1{font-weight:750;letter-spacing:-3.4px}.welcome-copy h1 span{font-style:normal;font-weight:750;background:linear-gradient(100deg,#a34dfa 0%,#7040e3 45%,#4b73df 100%);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:-3.1px}.welcome-description{color:#767185}.primary-button{border-radius:999px;padding:15px 20px;background:linear-gradient(135deg,#a34eff,#7035d5 53%,#3f56ca);box-shadow:inset 0 1px 1px #ffffff9c,0 7px 0 #3c2673,0 12px 25px #5929a548;transition:transform .2s,box-shadow .2s}.primary-button:hover{background:linear-gradient(135deg,#ad61ff,#7740df 53%,#4965de);transform:translateY(-3px);box-shadow:inset 0 1px #fff,0 9px 0 #3c2673,0 16px 28px #5929a550}.welcome-art{background:radial-gradient(ellipse,#e9e2fa 0,#eeebf6 53%,transparent 72%)}.art-sun{background:linear-gradient(145deg,#f4dcff,#b98cff);box-shadow:0 12px 32px #9150db30}.art-shape{background:linear-gradient(140deg,#e5dcfa,#dfe5fa 70%,#d8eaff);box-shadow:inset 1px 2px 8px #fff9}.art-book{background:linear-gradient(145deg,#713bd1,#49239e 70%,#252036);border:1px solid #ffffff74;box-shadow:inset 0 1px 2px #ffffff82,0 19px 32px #2c174a3b,0 5px 0 #301867;transform:translate(-47%,-31%) rotate(-8deg) perspective(500px) rotateY(-5deg)}.art-book:after{background:linear-gradient(90deg,#32196c,#241b39);border-left:1px solid #ffffff4d}.art-card{border:1px solid #fff;box-shadow:inset 0 1px #fff,0 14px 28px #36204e17,0 4px 0 #ddd4ec;background:rgba(255,255,255,.83);backdrop-filter:blur(14px)}.card-sentence span{color:#7040ca}.card-check{background:linear-gradient(145deg,#a960ff,#6641db);box-shadow:0 3px 7px #6536c63d}.art-sticker{background:linear-gradient(145deg,#f2e6ff,#dce6ff);color:#674a92;border:1px solid #fff;box-shadow:inset 0 1px #fff,0 8px 20px #55398220}.art-sticker span{color:#7844dc}.art-plant .plant-leaf{background:linear-gradient(135deg,#a47ce7,#748dde)}.plant-stem{background:#7e6cbd}.plant-pot{background:linear-gradient(135deg,#b57de9,#7a5ac4)}.art-pencil{background:linear-gradient(90deg,#a574f5,#5b43c4);box-shadow:0 4px 8px #38245940}.art-caption{color:#8e829f}.welcome-note{color:#827b8c}.note-stars{color:#8e5ce1}
.lesson-heading{background:linear-gradient(120deg,rgba(243,232,255,.94),rgba(231,233,255,.92) 56%,rgba(224,239,255,.9));border:1px solid #fff;border-radius:16px;box-shadow:inset 0 1px 1px #fff,0 13px 28px #45336d12,0 5px 0 #e2dcee}.lesson-heading h1{font-weight:750}.title-period{color:#8551df}.kicker-pill{border:1px solid #ffffff;background:rgba(255,255,255,.65);border-radius:999px;color:#7046b5}.lesson-heading-copy>p{color:#726d81}.sun-face{background:linear-gradient(145deg,#f1dbff,#a984fa);color:#fff;box-shadow:inset 0 2px 4px #fff,0 9px 22px #8053d442}.heading-ground{background:linear-gradient(145deg,#dcccf8,#d2e1ff);border:1px solid #ffffffa8;box-shadow:inset 0 2px 4px #fff}.heading-sprout{color:#7559bd}
.lesson-tab{border-radius:10px 10px 0 0}.lesson-tab.active{border-bottom-color:#7f40dc;color:#6730bb}.lesson-tab.active>span{color:#9565dc}.section-number{color:#8d55dc}.section-eyebrow{color:#8f849d}.section-heading h2{font-weight:730}.section-lead{color:#716c7c}.section-lead strong{color:#6540a4}
.explanation-card,.formula-card,.pattern-card,.example-card,.video-card{background:rgba(255,255,255,.68);border:1px solid #fff;border-radius:13px;box-shadow:inset 0 1px 1px #fff,0 7px 19px #39294d0a;backdrop-filter:blur(13px);-webkit-backdrop-filter:blur(13px)}.card-icon{background:linear-gradient(145deg,#f1ddff,#e1e4ff);color:#8342d0;border-radius:9px}.explanation-card strong,.subheading-row h3{color:#453258}.explanation-card p,.grammar-note p,.pattern-card p,.example-context,.tip-row p{color:#797384}.formula-card{border-color:#fff}.formula-tense{color:#7444bf}.formula-example b{color:#6435b0}.grammar-note{background:linear-gradient(115deg,#f1eaff,#edf0ff);border:1px solid #fff;border-radius:10px}.grammar-note strong{color:#594271}.grammar-note b{color:#6b36bc}.pattern-card p b{color:#6839b1}.question-pattern{background:linear-gradient(130deg,#f6efff,#eef1ff)}
.example-card{transition:transform .2s,box-shadow .2s}.example-card:hover{transform:translateY(-2px);box-shadow:inset 0 1px #fff,0 12px 24px #39294d14}.example-icon{background:linear-gradient(145deg,#f4e8ff,#e8eeff);border:1px solid #fff;border-radius:10px}.example-card p{color:#403449}.example-card p strong{color:#7139c4}.say-it-card{background:linear-gradient(120deg,#f0e8ff,#e7ecff);border:1px solid #fff;border-radius:13px;box-shadow:inset 0 1px #fff,0 7px 18px #39294d0b}.say-it-icon{color:#7340c9;box-shadow:0 3px 8px #52357918}.say-it-label{color:#7447b1}.say-it-card p{color:#48375e}.say-it-card p span{border-color:#9070cb;color:#7144c4}
.tip-row{border-color:#e9e3f0}.tip-bullet{background:linear-gradient(145deg,#f0e1ff,#e2e9ff);color:#7243bf;box-shadow:inset 0 1px #fff}.tip-row strong{color:#483556}.confidence-card{background:linear-gradient(115deg,#f5eaff,#e9edff);border:1px solid #fff;border-radius:13px;box-shadow:inset 0 1px #fff,0 7px 18px #39294d0b}.confidence-sparkle{color:#8c51d7}.confidence-card p{color:#716183}.confidence-card p strong{color:#49336d}
.video-card{transition:transform .2s,box-shadow .2s}.video-card:hover{border-color:#c2a4ed;transform:translateY(-2px);box-shadow:inset 0 1px #fff,0 12px 25px #6635a51a}.video-play{background:linear-gradient(145deg,#f0ddff,#dfe8ff);color:#7540ce;box-shadow:inset 0 1px #fff,0 3px 8px #6334a51a}.video-source{color:#8060ad}.video-copy strong{color:#453357}.video-arrow{color:#7643c8}.video-footnote{color:#8c8594}
.lesson-aside{color:#51475c}.aside-link.active{border-left-color:#854ce0;color:#6337ab;background:linear-gradient(100deg,#f1e7ff,#eeedff)}.aside-link.active>span{color:#8654cf}.on-this-page{border-color:#e4ddef}.remember-card{background:linear-gradient(140deg,#f0e7ff,#e8edff);border:1px solid #fff;border-radius:13px;box-shadow:inset 0 1px #fff,0 8px 18px #39294d0c}.remember-top{color:#745b98}.remember-top span{color:#8a52d0}.remember-card p{color:#57416f}.remember-card p b{color:#703dc4}.welcome-return:hover{color:#6834b4}.lesson-footer{border-color:#e7e0ed;color:#766987}.footer-star{color:#8752d2}.back-to-top:hover{color:#6734b5}.site-footer{border-color:#e4dfeb;color:#8b8492}.site-footer>span:first-child{color:#8b55d9}.site-footer>span:last-child{color:#71618b}
.lesson-notice{border-color:#fff;background:rgba(255,255,255,.84);backdrop-filter:blur(18px);color:#593287;box-shadow:inset 0 1px #fff,0 12px 32px #3d24662e;border-radius:14px}
@media(max-width:740px){.sidebar{background:rgba(255,255,255,.78);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-color:#fff}.nav-item{border-radius:999px;box-shadow:0 3px 9px #35214e0a}.nav-item.active{box-shadow:inset 0 1px #fff,0 4px 11px #6632b219}.lesson-heading{border-radius:14px}.lesson-tabs{border-color:#e5dfec}.lesson-tab.active{color:#6730bb}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition:none!important}}

/* Readability and proportion pass */
.topbar{height:72px;padding-inline:clamp(24px,4vw,64px)}
.topbar-center{font-size:13px}.topbar-link{font-size:13px;padding:12px 19px}
.app-shell{grid-template-columns:300px minmax(0,1fr);min-height:calc(100vh - 112px)}
.sidebar{padding:38px 24px 24px}.sidebar-intro{padding:0 8px 25px}.sidebar-intro h2{font-size:23px;line-height:1.3}.sidebar-intro p{font-size:13px}.sidebar-eyebrow{font-size:10px}.progress-label{font-size:9px}
.group-heading{height:42px;font-size:14px;gap:10px}.group-icon{height:24px;width:24px;font-size:15px}.group-count{font-size:10px}.nav-items{margin:4px 0 8px 17px;gap:4px}.nav-item{min-height:39px;padding:0 12px 0 14px;font-size:13px;border-radius:11px}.nav-item .nav-status{font-size:9px}.nav-item:before{width:6px;height:6px}
.welcome-view{min-height:calc(100vh - 112px);max-width:1220px;padding:7vh 7% 52px;grid-template-columns:1.02fr 1fr;column-gap:56px}.welcome-copy{padding-bottom:35px}.welcome-kicker{font-size:11px}.welcome-copy h1{font-size:clamp(56px,6.2vw,78px);line-height:1.08;letter-spacing:-3.8px;margin:27px 0 22px}.welcome-copy h1 span{letter-spacing:-3.5px}.welcome-description{font-size:17px;line-height:1.8;max-width:470px;margin-bottom:28px}.primary-button{font-size:14px;padding:17px 23px}.welcome-note{font-size:12px;margin-top:24px}.note-stars{font-size:11px}.welcome-art{height:430px}.art-card{width:178px;padding:19px 17px 20px}.card-mini{font-size:9px}.card-sentence{font-size:19px}.art-book{width:225px;height:166px}.book-label{font-size:11px;top:38px;left:29px}.book-label strong{font-size:18px}.art-sticker{width:92px;height:92px;font-size:16px}.art-caption{font-size:9px}.welcome-bottom{font-size:9px}.site-footer{height:44px;font-size:11px}
.lesson-view{max-width:1210px;padding:42px clamp(32px,5vw,72px) 60px}.breadcrumbs{font-size:12px;gap:10px}.lesson-meta{font-size:10px}.lesson-heading{min-height:200px;margin-top:38px;padding:36px 48px;border-radius:18px}.lesson-kicker{font-size:10px}.kicker-pill{padding:7px 10px}.lesson-heading h1{font-size:clamp(48px,5vw,64px);letter-spacing:-2.6px;margin:15px 0 8px}.lesson-heading-copy>p{font-size:15px;max-width:530px;line-height:1.6}.heading-illustration{transform:scale(1.23);transform-origin:center right;margin-right:25px}
.lesson-tabs{gap:14px;margin:29px 0 37px}.lesson-tab{height:46px;padding:0 16px 13px;font-size:13px;gap:9px}.lesson-tab>span{font-size:10px}
.lesson-layout{grid-template-columns:minmax(0,1fr) 220px;gap:48px}.lesson-section{scroll-margin-top:100px;margin-bottom:48px}.section-heading{gap:15px;margin-bottom:17px}.section-number{font-size:25px}.section-eyebrow{font-size:10px;letter-spacing:1.3px;margin-bottom:5px}.section-heading h2{font-size:25px;letter-spacing:-.7px}.section-lead{font-size:15px;line-height:1.8;margin-bottom:19px}.explanation-card{gap:15px;padding:19px;border-radius:15px}.card-icon{width:36px;height:36px;font-size:18px}.explanation-card strong{font-size:14px}.explanation-card p{font-size:14px;line-height:1.75;margin-top:7px}
.subheading-row{margin:27px 0 12px}.subheading-row h3{font-size:16px}.subheading-note{font-size:9px}.formula-card{padding:8px 19px;border-radius:13px}.formula-line{min-height:52px;gap:14px}.formula-label{width:130px;font-size:10px}.formula-equals{font-size:16px}.formula-tense{min-width:82px;font-size:17px}.formula-example{font-size:14px}.grammar-note{gap:12px;margin-top:13px;padding:15px;border-radius:11px}.note-icon{height:19px;width:19px;font-size:12px}.grammar-note p{font-size:12px;line-height:1.8}
.two-cards{gap:12px}.pattern-card{padding:16px;border-radius:13px}.pattern-label{font-size:9px}.pattern-card p{font-size:14px;line-height:1.8;margin:10px 0}.pattern-hint{font-size:11px}
.examples-section,.tips-section,.videos-section{padding-top:13px}.example-list{gap:10px}.example-card{padding:15px 17px;gap:14px;border-radius:13px}.example-icon{height:38px;width:38px;font-size:18px}.example-type{font-size:9px;letter-spacing:1px}.example-card p{font-size:15px;margin:5px 0}.example-context{font-size:11px}.example-number{font-size:15px}.say-it-card{padding:17px 19px;gap:14px;margin-top:13px;border-radius:13px}.say-it-icon{height:34px;width:34px;font-size:18px}.say-it-label{font-size:9px}.say-it-card p{font-size:16px;margin:6px 0}.say-it-help{font-size:11px}
.tip-row{gap:15px;padding:15px 0}.tip-bullet{height:28px;width:28px;font-size:13px}.tip-row strong{font-size:14px}.tip-row p{font-size:13px;line-height:1.8;margin-top:6px}.confidence-card{padding:18px 20px;gap:15px;margin-top:15px}.confidence-card p{font-size:15px;line-height:1.7}.confidence-sparkle{font-size:22px}
.video-card{padding:17px;gap:15px;border-radius:13px;margin-bottom:11px}.video-play{width:42px;height:42px;font-size:14px}.video-copy{gap:5px}.video-source{font-size:9px}.video-copy strong{font-size:14px}.video-copy>span:last-child{font-size:12px;line-height:1.6}.video-arrow{font-size:18px}.video-footnote{font-size:11px;margin-top:12px}
.lesson-aside{padding-top:7px}.aside-heading{font-size:10px;margin-bottom:14px}.aside-link{min-height:39px;font-size:12px;gap:11px;border-radius:0 9px 9px 0}.aside-link>span{font-size:13px}.remember-card{padding:16px;margin-top:18px;border-radius:14px}.remember-top{font-size:9px}.remember-card p{font-size:15px;margin:11px 0}.remember-example{font-size:11px}.welcome-return{font-size:11px;margin-top:16px}.lesson-footer{padding-top:17px;font-size:12px}.back-to-top{font-size:11px}
/* Remove repeated microcopy so the lesson can breathe. */
.sidebar-bottom,.welcome-note,.welcome-bottom,.site-footer,.lesson-meta,.lesson-aside .remember-card{display:none}
@media(max-width:980px){.app-shell{grid-template-columns:260px minmax(0,1fr)}.sidebar{padding:28px 17px}.nav-item{font-size:12px}.welcome-view{column-gap:22px;padding-inline:5%}.welcome-copy h1{font-size:clamp(49px,6vw,64px)}.welcome-description{font-size:15px}.welcome-art{height:350px}.lesson-view{padding:30px 26px 45px}.lesson-heading{padding:28px 29px;min-height:174px}.lesson-heading h1{font-size:48px}.heading-illustration{transform:scale(.95);margin-right:0}.lesson-layout{grid-template-columns:minmax(0,1fr) 180px;gap:24px}.section-heading h2{font-size:22px}.section-lead{font-size:14px}.formula-label{width:105px}.lesson-tabs{gap:4px}.lesson-tab{padding-inline:10px;font-size:12px}}
@media(max-width:740px){.topbar{height:62px;padding-inline:17px}.app-shell{min-height:calc(100vh - 62px)}.sidebar{padding:12px 12px 14px}.sidebar-intro{display:none}.sidebar-bottom,.group-heading,.site-footer{display:none!important}#lesson-nav{gap:7px}.nav-items{gap:6px;margin:0}.nav-item{min-height:35px;padding:0 12px;font-size:11px}.welcome-view{min-height:calc(100svh - 120px);padding:38px 22px 36px;gap:6px}.welcome-copy{padding:0}.welcome-kicker{font-size:9px}.welcome-copy h1{font-size:clamp(43px,12vw,58px);letter-spacing:-2.4px;margin:17px 0 14px}.welcome-copy h1 span{letter-spacing:-2px}.welcome-description{font-size:14px;line-height:1.7;margin-bottom:21px}.primary-button{font-size:12px;padding:14px 18px}.welcome-art{height:260px;min-height:245px;margin-top:6px}.lesson-view{padding:22px 17px 34px}.lesson-topline{align-items:center}.breadcrumbs{font-size:10px}.lesson-heading{margin-top:20px;min-height:148px;padding:18px 16px;border-radius:14px}.lesson-heading h1{font-size:clamp(31px,8vw,40px);letter-spacing:-1.5px}.lesson-kicker{font-size:8px}.lesson-heading-copy>p{font-size:12px;max-width:235px}.heading-illustration{transform:scale(.7);transform-origin:center right;width:68px;margin:0}.lesson-tabs{gap:0;margin:19px 0 23px;overflow-x:auto;scrollbar-width:none}.lesson-tab{height:41px;padding:0 11px 10px;font-size:10px}.lesson-layout{display:block}.lesson-aside{display:none}.lesson-section{margin-bottom:34px}.section-heading{gap:11px;margin-bottom:13px}.section-number{font-size:21px}.section-eyebrow{font-size:8px}.section-heading h2{font-size:19px}.section-lead{font-size:13px;line-height:1.75;margin-bottom:14px}.explanation-card{padding:14px;gap:11px}.card-icon{height:31px;width:31px}.explanation-card strong{font-size:12px}.explanation-card p{font-size:12px}.subheading-row{margin:20px 0 9px}.subheading-row h3{font-size:13px}.subheading-note{font-size:7px}.formula-card{padding:5px 10px}.formula-line{min-height:43px;gap:6px}.formula-label{width:84px;font-size:7px}.formula-tense{min-width:51px;font-size:13px}.formula-example{font-size:10px}.grammar-note{padding:11px}.grammar-note p{font-size:10px}.pattern-card{padding:11px}.pattern-label{font-size:7px}.pattern-card p{font-size:11px}.pattern-hint{font-size:9px}.example-card{padding:12px;gap:10px}.example-icon{width:32px;height:32px}.example-type{font-size:7px}.example-card p{font-size:12px}.example-context{font-size:9px}.say-it-card{padding:13px}.say-it-card p{font-size:13px}.say-it-help{font-size:9px}.tip-row{gap:11px;padding:12px 0}.tip-bullet{height:24px;width:24px}.tip-row strong{font-size:12px}.tip-row p{font-size:11px}.confidence-card{padding:14px}.confidence-card p{font-size:12px}.video-card{padding:13px;gap:11px}.video-play{width:35px;height:35px}.video-source{font-size:7px}.video-copy strong{font-size:11px}.video-copy>span:last-child{font-size:9px}.video-footnote{font-size:9px}.lesson-footer{font-size:10px}.back-to-top{font-size:9px}}
@media(max-width:740px){.sidebar{order:0}.app-shell>main{order:1}}
.section-eyebrow{display:none!important}
.section-number,.lesson-kicker,.subheading-note,.example-type{display:none!important}
.lesson-heading h1{margin-top:0}.section-heading{margin-bottom:14px}
/* Rounded surfaces and softer navigation edges */
.topbar{margin:12px 18px 0;border:1px solid #ffffffd9;border-radius:24px;min-height:72px;box-shadow:inset 0 1px 1px #fff,0 10px 32px #35214e12}
.app-shell{margin-top:14px}
.sidebar{border:1px solid #ffffffb8;border-radius:0 26px 26px 0;margin:0 12px 0 0;overflow:hidden;box-shadow:inset 0 1px #ffffffb0,8px 10px 30px #35214e0a}
.nav-group{border:1px solid #ffffffa6;border-radius:17px;background:rgba(255,255,255,.42);padding:5px 6px 7px;margin-bottom:7px;box-shadow:inset 0 1px #ffffffb0,0 5px 15px #35214e07}
.group-heading{border-radius:13px;padding-inline:9px}.nav-items{margin:3px 0 0 9px}.nav-item{border-radius:999px;min-height:41px;padding-inline:15px;border:1px solid transparent}.nav-item.active{border-color:#ffffffd9}
.lesson-tabs{border:1px solid #ffffffd9;background:rgba(255,255,255,.52);backdrop-filter:blur(14px);border-radius:999px;padding:6px;gap:5px;box-shadow:inset 0 1px #fff,0 6px 18px #39294d09}.lesson-tab{height:39px;padding:0 17px;border:0;border-radius:999px}.lesson-tab.active{background:linear-gradient(120deg,#f0e4ff,#e5e8ff);box-shadow:inset 0 1px #fff,0 3px 10px #6437a516;color:#6533bb}
.lesson-heading,.explanation-card,.formula-card,.pattern-card,.example-card,.say-it-card,.confidence-card,.video-card,.remember-card{border-radius:20px}.grammar-note{border-radius:15px}.example-icon,.card-icon{border-radius:12px}.formula-card{overflow:hidden}.lesson-footer{border-radius:16px}.lesson-notice{border-radius:20px}
.welcome-view{border-radius:28px}.art-card{border-radius:18px}.art-book{border-radius:12px 16px 15px 12px}.art-sticker{border-radius:50%}.primary-button,.topbar-link{border-radius:999px}
@media(max-width:980px){.topbar{margin-inline:12px;border-radius:20px}.sidebar{border-radius:0 22px 22px 0}.lesson-tabs{border-radius:999px}}
@media(max-width:740px){.topbar{margin:9px 10px 0;min-height:62px;border-radius:19px}.app-shell{margin-top:9px}.sidebar{margin:0 10px;border-radius:20px;padding:11px;background:rgba(255,255,255,.7);border:1px solid #ffffffd9}.nav-group{border-radius:15px;margin:0;padding:4px;background:rgba(255,255,255,.48)}.nav-items{margin:0}.nav-item{border-radius:999px;min-height:36px;padding-inline:13px}.lesson-tabs{border-radius:18px;justify-content:flex-start}.lesson-tab{padding-inline:13px}.lesson-heading,.explanation-card,.formula-card,.pattern-card,.example-card,.say-it-card,.confidence-card,.video-card{border-radius:16px}}
.topbar{position:static;top:auto}
.lesson-heading{min-height:150px;margin-top:27px;padding:25px 34px;background:#eee8f7;border:1px solid #e4dbee;border-radius:14px;box-shadow:none;backdrop-filter:none;overflow:hidden}
.lesson-heading h1{font-size:43px;letter-spacing:-1.7px;margin:0 0 7px;color:#292332}
.lesson-heading-copy>p{font-size:14px;line-height:1.65;color:#655d70;max-width:580px}
.heading-illustration{display:none}
.lesson-layout{display:block;max-width:900px;margin-inline:auto}
.lesson-article{max-width:100%}
.lesson-section.academic-section{padding:27px 0 32px;border-top:1px solid #e5dfeb}
.academic-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.academic-card{padding:19px 21px;border:1px solid #e6dfed;border-radius:16px;background:rgba(255,255,255,.76);box-shadow:0 5px 14px #38245208}
.academic-card h3{font-size:16px;color:#453459;margin:0 0 11px;letter-spacing:-.2px}
.academic-card p,.academic-card li{font-size:13px;line-height:1.75;color:#6c6576}
.academic-card p{margin:0 0 9px}.academic-card p:last-child{margin-bottom:0}
.academic-card ul{margin:0;padding-left:19px;display:grid;gap:8px}.academic-card li::marker{color:#8753ce}.academic-card strong{color:#563284}.academic-card em{color:#71538f}
@media(max-width:740px){.lesson-heading{min-height:unset;margin-top:19px;padding:19px 18px;border-radius:13px}.lesson-heading h1{font-size:32px;letter-spacing:-1.1px;margin-bottom:5px}.lesson-heading-copy>p{font-size:12px;line-height:1.55}.heading-illustration{display:none}.academic-grid{grid-template-columns:1fr;gap:10px}.academic-card{padding:16px;border-radius:14px}.academic-card h3{font-size:14px}.academic-card p,.academic-card li{font-size:12px}.lesson-section.academic-section{padding-top:22px}.lesson-layout{max-width:100%}}
.primary-button,.primary-button:hover{box-shadow:none}

/* English club and SAALPU Sudan flag header */
.brand{font-size:20px;font-weight:800;letter-spacing:-.55px;color:#251d31}
.topbar-center{display:block;text-align:center;color:#736980;font-size:12px;font-weight:550;letter-spacing:0}
.saalpu-mark{display:flex;align-items:center;gap:8px;min-width:112px;justify-content:flex-end}
.saalpu-mark img{display:block;width:49px;height:49px;object-fit:contain;filter:drop-shadow(0 5px 4px #25123835)}
.saalpu-mark span{font-family:var(--heading);font-size:19px;font-weight:900;letter-spacing:1.1px;color:#392351;text-shadow:0 1px 0 #eee3ff,0 2px 0 #cfc0e7,0 3px 0 #a58dbc,0 4px 7px #29133d52}
@media(max-width:740px){.topbar{height:auto;min-height:70px;display:grid;grid-template-columns:1fr auto;gap:4px 8px;padding:8px 13px 10px}.brand{font-size:17px}.topbar-center{display:block;grid-column:1/-1;grid-row:2;text-align:center;font-size:10px;line-height:1.35}.saalpu-mark{min-width:unset;gap:5px}.saalpu-mark img{width:38px;height:38px}.saalpu-mark span{font-size:16px}.topbar-link{display:none}}

/* Final header and lesson-title polish */
.topbar,.sidebar,.lesson-heading{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
.topbar{background:#fff;border-color:#ece5f6;box-shadow:0 4px 16px #49336c0b}
.brand{font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:23px;font-weight:850;letter-spacing:-.85px;background:linear-gradient(105deg,#a044ed 0%,#762dd1 46%,#4e47c8 100%);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 1px 0 #fff,0 2px 0 #e4d1ff;filter:drop-shadow(0 2px 2px #7443a523)}
.topbar-center{font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:16px;font-weight:650;line-height:1.4;letter-spacing:-.2px;color:#553078}
.sidebar{background:#faf8fd}
.lesson-heading{position:relative;min-height:154px;padding:27px 38px;background:linear-gradient(115deg,#f4eaff 0%,#eeeaff 54%,#e8f0ff 100%);border:1px solid #e0d5f1;border-radius:20px;box-shadow:inset 0 1px 0 #fff,0 4px 0 #dfd3ed}
.lesson-heading:before{content:"";position:absolute;inset:16px auto 16px 0;width:4px;border-radius:0 5px 5px 0;background:linear-gradient(180deg,#b255ee,#7240d9 60%,#5480e8)}
.lesson-heading h1{font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:44px;letter-spacing:-1.7px;color:#38234e;text-shadow:0 1px #fff;margin:0 0 6px}
.lesson-heading .title-period{color:#8846df}
.lesson-heading-copy>p{font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;font-size:15px;line-height:1.55;color:#655576;max-width:560px}
@media(max-width:740px){.brand{font-size:19px}.topbar-center{font-size:12px}.lesson-heading{min-height:unset;padding:20px 20px 20px 23px;border-radius:16px}.lesson-heading:before{inset-block:13px}.lesson-heading h1{font-size:33px}.lesson-heading-copy>p{font-size:12px}}

/* Wordmark and quiet white lesson banner */
.brand{background:none;color:#30233e;text-shadow:none;filter:none}
.brand-wordmark{display:inline-flex;align-items:baseline;gap:0;white-space:nowrap}
.brand-english{background:linear-gradient(100deg,#a044ed,#7837d2 58%,#6542cb);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:-.85px}
.brand-club{color:#30233e;letter-spacing:-.85px;margin-left:-1px}
.lesson-heading{background:#fff;border:1px solid #eee8f4;border-radius:20px;box-shadow:0 3px 12px #39294d08;padding:27px 38px}
.lesson-heading:before{display:none}
.lesson-heading h1{color:#30233e;text-shadow:none}
.lesson-heading .title-period{color:#7e49c7}
.lesson-heading-copy>p{color:#716b79}
@media(max-width:740px){.lesson-heading{padding:20px 20px;border-radius:16px}}

/* Site-wide typography and surface system */
:root{--ink:#292633;--muted:#6e6b77;--green:#7144c2;--deep:#59339d;--line:#e9e6ee;--paper:#f7f6f3;--white:#fff;--mint:#f1eef7;--peach:#f5f1ec;--serif:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;--sans:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;--heading:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif}
*{font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif}
body{background:#f7f6f3;color:#292633}
.topbar{background:#fff;border-color:#ebe8ef;box-shadow:0 3px 14px #342c4009}
.sidebar{background:#f9f8f6;border-color:#eae7ed;box-shadow:4px 0 20px #342c4006}
.sidebar-intro h2,.welcome-copy h1,.lesson-heading h1,.section-heading h2{color:#292633}
.sidebar-intro p,.welcome-description,.lesson-heading-copy>p,.section-lead{color:#6c6975}
.topbar-center{color:#5d476f}
.brand-club{color:#342b40}
.lesson-heading{background:#fff;border-color:#e8e4ec;box-shadow:0 3px 12px #342c4008}
.lesson-heading h1{color:#302638}
.lesson-heading-copy>p{color:#686372}
.lesson-tabs{background:#fff;border-color:#e9e5ed;box-shadow:0 3px 12px #342c4008}
.lesson-tab{color:#686572}.lesson-tab.active{color:#6035a3;background:#f2ecfa;box-shadow:inset 0 1px #fff,0 2px 7px #6035a310}
.lesson-heading,.lesson-tabs,.explanation-card,.formula-card,.pattern-card,.example-card,.say-it-card,.confidence-card,.video-card,.academic-card,.remember-card{border-color:#e9e5ec;box-shadow:0 3px 12px #342c4008}
.explanation-card,.formula-card,.pattern-card,.example-card,.video-card,.academic-card{background:#fff}
.grammar-note,.question-pattern{background:#f3eff8;border-color:#eae4f2}
.say-it-card,.confidence-card,.remember-card{background:#f1eef5;border-color:#e8e2ef}
.section-heading h2,.academic-card h3{color:#302b38}
.explanation-card strong,.subheading-row h3,.tip-row strong,.video-copy strong{color:#393242}
.explanation-card p,.pattern-card p,.academic-card p,.academic-card li,.tip-row p,.example-context,.video-copy>span:last-child{color:#6c6975}
.example-card p{color:#403c48}.formula-label,.subheading-note,.section-eyebrow{color:#77727f}
.nav-group{background:#fff;border-color:#ebe7ee;box-shadow:0 2px 9px #342c4005}
.nav-item{color:#666370}.nav-item:hover{background:#f6f4f8;box-shadow:none}.nav-item.active{background:#f0eafa;color:#5f359e;box-shadow:inset 0 0 0 1px #e8dcf5}
.primary-button{background:linear-gradient(110deg,#8b4bd5,#7043be);box-shadow:0 4px 10px #7043be25}.primary-button:hover{background:linear-gradient(110deg,#9659df,#7950c7)}
.site-footer{color:#77727f;border-color:#e9e5ec}

/* Reusable sentence-form and tense-use layouts */
.lesson-formulas{padding:8px 18px;margin:0;background:#fff;border:1px solid #e9e5ec;border-radius:15px}
.lesson-formula-row{display:grid;grid-template-columns:122px minmax(0,1fr);gap:14px;align-items:center;min-height:47px;border-bottom:1px solid #efedf1;color:#45404c;font-size:14px;line-height:1.6}
.lesson-formula-row:last-child{border-bottom:0}
.lesson-formula-label{font-size:9px;letter-spacing:.65px;font-weight:800;color:#776b83}
.academic-notes{margin-top:12px}
.academic-card .academic-example{font-weight:700;color:#593d78}
.academic-card p+p{margin-top:8px}
@media(max-width:740px){.lesson-formulas{padding:5px 11px}.lesson-formula-row{grid-template-columns:83px minmax(0,1fr);gap:8px;min-height:44px;font-size:11px}.lesson-formula-label{font-size:7px}.academic-notes{margin-top:9px}}

/* SSALPU text mark in the Sudan flag palette */
.saalpu-mark{min-width:unset;gap:8px}
.saalpu-mark::before{content:"";display:block;width:14px;height:18px;flex:none;background:#087a3b;clip-path:polygon(0 0,100% 50%,0 100%);filter:drop-shadow(0 1px 1px #183a27aa)}
.saalpu-letters{display:inline-flex;align-items:baseline;gap:1px;font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif!important;font-size:20px!important;font-weight:900!important;letter-spacing:.15px!important;text-shadow:0 1px 0 #ffffffb3,0 2px 3px #28202d28!important}
.saalpu-letters .flag-red{color:#d92736!important;text-shadow:0 1px 0 #fff,0 2px 3px #28202d28!important}
.saalpu-letters .flag-white{color:#fff!important;-webkit-text-stroke:.8px #514858;text-shadow:0 1px 0 #514858,0 2px 3px #28202d28!important}
.saalpu-letters .flag-black{color:#17151b!important;text-shadow:0 1px 0 #ffffffa8,0 2px 3px #28202d28!important}
.saalpu-letters .flag-green{color:#087a3b!important;text-shadow:0 1px 0 #fff,0 2px 3px #28202d28!important}
@media(max-width:740px){.saalpu-mark{gap:6px}.saalpu-mark::before{width:11px;height:14px}.saalpu-letters{font-size:17px!important}}

/* Match SSALPU wordmark typography to Englishclub */
.saalpu-mark{gap:0}
.saalpu-mark::before{display:none}
.saalpu-letters{font-family:"SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif!important;font-size:23px!important;font-weight:850!important;letter-spacing:-.85px!important;line-height:1!important;text-shadow:none!important}
.saalpu-letters .flag-red,.saalpu-letters .flag-black,.saalpu-letters .flag-green{ text-shadow:none!important }
.saalpu-letters .flag-white{-webkit-text-stroke:.7px #514858;text-shadow:none!important}
@media(max-width:740px){.saalpu-mark{gap:0}.saalpu-letters{font-size:19px!important;letter-spacing:-.75px!important}}

.breadcrumbs{color:#b3a4c3}
.breadcrumbs a{color:#a58abd}
.breadcrumbs a:hover{color:#7852a5}
.breadcrumbs strong{color:#9474b3}

/* Study and practice modes */
.lesson-mode-switch{display:flex;justify-content:flex-end;gap:4px;width:max-content;margin:18px 0 0 auto;padding:4px;border:1px solid #e9e5ec;border-radius:999px;background:#fff;box-shadow:0 2px 8px #342c4008}
.mode-button{border:0;border-radius:999px;padding:8px 17px;background:transparent;color:#77717e;font:650 12px "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;cursor:pointer;transition:background .18s,color .18s,transform .18s}
.mode-button:hover{color:#593994}.mode-button.active{background:#f0eafa;color:#6035a3;box-shadow:inset 0 1px #fff,0 2px 6px #6035a310}
.nav-lesson-row{display:flex;align-items:center;gap:5px;min-width:0}.nav-lesson-row .nav-study{flex:1;min-width:0}.nav-lesson-row .nav-status{font-size:9px}.nav-practice{flex:none;padding:6px 9px;border:1px solid #eee9f2;border-radius:999px;color:#766786;background:#fff;text-decoration:none;font-size:9px;font-weight:650;transition:background .18s,color .18s,border-color .18s}.nav-practice:hover,.nav-practice.active{background:#efe8f8;border-color:#e2d4f0;color:#6035a3}
.reference-nav{border-top:1px solid #eae6ed;margin-top:auto;padding:13px 5px 12px;display:grid;gap:5px}.reference-heading{padding:0 8px 4px;font-size:9px;font-weight:800;letter-spacing:.8px;color:#817788}.reference-nav a{display:block;border-radius:10px;padding:9px 10px;color:#61576d;text-decoration:none;font-size:11px;font-weight:600}.reference-nav a span{color:#8654c2;margin-right:6px}.reference-nav a:hover,.reference-nav a.active{background:#f0eafa;color:#5f359e}
.practice-panel{max-width:800px;margin:0 auto;padding:clamp(22px,4vw,40px);border:1px solid #e8e2ef;border-radius:22px;background:#fff;box-shadow:0 12px 36px #342c400c}
.practice-panel-top{display:flex;align-items:center;justify-content:space-between;gap:12px}.practice-kicker,.library-kicker{font-size:10px;font-weight:800;letter-spacing:1.1px;color:#8253b6;margin:0 0 7px}.practice-panel h2{font-size:clamp(22px,4vw,30px);letter-spacing:-.5px;color:#302b38;margin:0}.practice-count{font-size:20px;font-weight:800;color:#6035a3}.practice-count span{color:#a69eac;font-size:14px;font-weight:600}.practice-instruction{font-size:14px;line-height:1.65;color:#706b77;margin:12px 0 23px}
.practice-question{min-height:116px;padding:22px;display:grid;place-items:center;border:1px solid #ebe6ef;border-radius:18px;background:linear-gradient(135deg,#faf8fc,#f7f8fb)}.practice-sentence{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:8px;font-size:clamp(16px,3vw,22px);line-height:1.9;text-align:center;color:#393442}.drop-slot{min-width:116px;min-height:43px;padding:7px 14px;border:2px dashed #bba4d5;border-radius:12px;background:#f2ecf8;color:#6035a3;font:700 15px "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;cursor:pointer;transition:transform .18s,background .18s,border-color .18s,box-shadow .18s}.drop-slot:not(.has-word){font-size:12px;color:#89779b}.drop-slot.drag-over{transform:scale(1.06);border-color:#7443b7;background:#e9ddf6;box-shadow:0 5px 14px #7043be25}.drop-slot.has-word{border-style:solid;border-color:#a78bc7;background:#eee6f6}
.choice-bank{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin:23px 0}.choice-chip{min-width:86px;padding:11px 17px;border:1px solid #e7e1ec;border-radius:999px;background:#fff;color:#51445f;box-shadow:0 3px 9px #342c4009;font:650 13px "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;cursor:grab;transition:transform .18s,box-shadow .18s,background .18s;user-select:none}.choice-chip:hover{transform:translateY(-3px);box-shadow:0 7px 15px #55327c1b}.choice-chip:active,.choice-chip.dragging{cursor:grabbing;transform:scale(.96);background:#f0eafa}.practice-actions{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:9px}.check-answer,.next-question,.hint-button{min-height:41px;padding:0 17px;border:1px solid #e6e0ea;border-radius:999px;background:#fff;color:#62596b;font:650 12px "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;cursor:pointer}.check-answer,.next-question{border-color:#7144c2;background:#7144c2;color:#fff;box-shadow:0 3px 8px #7144c226}.check-answer:disabled{background:#ddd8e3;border-color:#ddd8e3;box-shadow:none;cursor:not-allowed}.hint-button:hover{background:#f6f2fa}.next-question:hover,.check-answer:not(:disabled):hover{background:#59339d}.practice-feedback{min-height:24px;margin:13px 0 0;text-align:center;color:#5c8b4b;font-size:13px;font-weight:650}.practice-progress{height:5px;margin-top:18px;border-radius:999px;background:#eeeaf1;overflow:hidden}.practice-progress span{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,#9b58d4,#6244bf);transition:width .35s ease}.practice-complete{max-width:600px;margin:35px auto;padding:40px;text-align:center;border:1px solid #e8e2ef;border-radius:22px;background:#fff;box-shadow:0 12px 36px #342c400c}.complete-icon{width:56px;height:56px;margin:0 auto 18px;border-radius:50%;display:grid;place-items:center;background:#f0eafa;color:#6941a6;font-size:26px}.practice-complete h2{font-size:30px;color:#302b38;margin:8px}.practice-complete>p:not(.practice-kicker){font-size:15px;color:#716b79;margin:12px 0 22px}
.library-view{min-width:0}.library-page{max-width:980px;margin:0 auto;padding:35px clamp(20px,5vw,62px) 60px}.library-back{font-size:12px;font-weight:600;color:#8062a0;text-decoration:none}.library-heading{margin:28px 0 24px}.library-kicker{margin-bottom:8px}.library-heading h1{font-size:clamp(30px,5vw,44px);letter-spacing:-1.1px;color:#302b38;margin:0 0 9px}.library-heading>p:last-child{font-size:15px;color:#706b77;line-height:1.65;margin:0;max-width:680px}.library-search-label{display:block;margin-bottom:7px;font-size:11px;font-weight:700;color:#62596b}.library-search{width:100%;max-width:500px;height:46px;padding:0 15px;border:1px solid #e4deea;border-radius:13px;background:#fff;color:#332b3b;font:14px "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;outline:none}.library-search:focus{border-color:#a78bc7;box-shadow:0 0 0 3px #eee5f8}.library-results{margin-top:18px}.verb-table-wrap{overflow:auto;border:1px solid #e8e3eb;border-radius:16px;background:#fff}.verb-table{width:100%;border-collapse:collapse;text-align:left}.verb-table th{position:sticky;top:0;padding:13px 16px;background:#f2eef6;color:#5a466f;font-size:11px;letter-spacing:.2px}.verb-table td{padding:11px 16px;border-top:1px solid #f0edf2;color:#4d4854;font-size:13px}.verb-table tbody tr:nth-child(even){background:#fbfafc}.verb-table tbody tr:hover{background:#f3eef8}.verb-table td:first-child{color:#a49aa9;font-size:10px;width:48px}.verb-table td:nth-child(n+2){font-weight:600}.sentence-list{display:grid;grid-template-columns:1fr 1fr;gap:8px 12px;list-style:none;margin:0;padding:0}.sentence-list li{display:flex;align-items:flex-start;gap:11px;padding:12px 14px;border:1px solid #e9e5ec;border-radius:13px;background:#fff;color:#4c4753;font-size:12px;line-height:1.6}.sentence-index{flex:none;color:#987eae;font-size:10px;font-weight:750}.library-empty{padding:20px;color:#766f7c;font-size:13px}
@media(max-width:740px){.lesson-mode-switch{margin-top:13px;padding:3px}.mode-button{padding:8px 15px;font-size:11px}.nav-lesson-row{flex:none}.nav-lesson-row .nav-study{min-height:34px;padding-inline:11px;font-size:10px}.nav-lesson-row .nav-status{display:none}.nav-practice{padding:7px 10px;font-size:9px}.reference-nav{margin-top:5px;padding:9px 3px;grid-template-columns:1fr 1fr}.reference-heading{grid-column:1/-1}.reference-nav a{font-size:9px;padding:8px}.practice-panel{padding:20px 15px;border-radius:17px}.practice-question{min-height:100px;padding:16px 10px}.practice-instruction{font-size:12px}.drop-slot{min-width:100px;min-height:40px}.choice-bank{gap:8px;margin:17px 0}.choice-chip{min-width:75px;padding:10px 13px;font-size:11px}.check-answer,.next-question,.hint-button{min-height:38px;padding:0 14px;font-size:11px}.practice-complete{padding:28px 19px}.library-page{padding:23px 16px 38px}.sentence-list{grid-template-columns:1fr}.verb-table th,.verb-table td{padding:10px 11px;font-size:11px}.verb-table th{font-size:10px}}
@media(max-width:740px){.nav-items.collapsed{display:none!important}}
.choice-chip:focus-visible,.drop-slot:focus-visible,.mode-button:focus-visible,.nav-practice:focus-visible{outline:3px solid #c3a8e3;outline-offset:2px}
.drop-slot.has-word{animation:answer-drop .2s ease-out}
@keyframes answer-drop{from{transform:translateY(-8px) scale(.96);opacity:.55}to{transform:translateY(0) scale(1);opacity:1}}

/* Tense titles expand into their Study and Practice tabs */
.nav-lesson-row{display:flex;flex-direction:column;gap:3px;min-width:0;padding:0 4px}
.nav-title{width:100%;min-height:38px;padding:0 11px 0 13px;display:flex;align-items:center;justify-content:space-between;gap:9px;border:1px solid transparent;border-radius:12px;background:transparent;color:#625c6b;text-align:left;font:650 12px "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;cursor:pointer;transition:background .18s,border-color .18s,color .18s}
.nav-title:hover{background:#f5f2f8;color:#503579}
.nav-title.active,.nav-title[aria-expanded="true"]{background:#f0eafa;border-color:#e9def5;color:#6035a3}
.lesson-chevron{color:#968aa0;font-size:13px;transition:transform .18s}.nav-title[aria-expanded="true"] .lesson-chevron{transform:rotate(180deg)}
.nav-subtabs{display:flex;gap:6px;padding:2px 8px 6px 15px;animation:subtabs-in .16s ease-out}
.nav-subtab{flex:1;display:block;padding:7px 11px;border:1px solid #ebe5f0;border-radius:999px;background:#fff;color:#756881;text-align:center;text-decoration:none;font-size:10px;font-weight:650;transition:background .18s,color .18s,border-color .18s}
.nav-subtab:hover,.nav-subtab.active{background:#e9dff5;border-color:#ded0ed;color:#593294}
@keyframes subtabs-in{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:740px){.nav-items{align-items:flex-start}.nav-lesson-row{width:154px;min-width:154px;flex:none;padding:0}.nav-title{min-height:35px;font-size:10px;padding-inline:10px}.nav-subtabs{padding:1px 3px 5px;gap:4px}.nav-subtab{padding:7px 8px;font-size:9px}}

/* Keep every sidebar category consistent and give its subtabs room */
.nav-subtabs{flex-direction:column;gap:7px;padding:4px 10px 8px 18px}
.nav-subtab{flex:none;width:100%;min-height:37px;padding:9px 14px;text-align:left;font-size:11px;border-radius:11px}
.nav-title{min-height:40px;font-size:13px}
.reference-icon{background:linear-gradient(145deg,#f0eafa,#e9eef8);color:#7144c2}
.reference-group .nav-items{margin-bottom:3px}
@media(max-width:740px){.group-heading{display:flex!important;height:34px;font-size:11px}.nav-title{min-height:36px;font-size:11px}.nav-subtabs{flex-direction:column;padding:3px 5px 7px 13px;gap:5px}.nav-subtab{min-height:35px;font-size:10px;padding:8px 11px}.nav-items{align-items:flex-start}.reference-group .nav-items{width:154px;min-width:154px}}

/* Simpler left-aligned lesson dropdowns */
.nav-title{justify-content:flex-start;min-height:37px;padding:0 10px;border:0;border-radius:9px;background:transparent;text-align:left;color:#625c6b;font-size:12px}
.nav-title:hover{background:#f5f2f8;color:#503579}
.nav-title.active,.nav-title[aria-expanded="true"]{border:0;background:#f0eafa;color:#6035a3;box-shadow:none}
.nav-title>span:first-child{flex:1;text-align:left}
.nav-title .lesson-chevron{margin-left:auto}
.nav-subtabs{width:100%;padding:2px 4px 7px 18px;align-items:stretch;gap:2px}
.nav-subtab{width:100%;min-height:34px;padding:7px 11px;border:0;border-radius:9px;background:transparent;text-align:left;color:#6b6572;font-size:11px;box-shadow:none}
.nav-subtab:before{content:"";width:5px;height:5px;margin-right:8px;display:inline-block;border-radius:50%;background:#d8d1df;vertical-align:2px}
.nav-subtab:hover,.nav-subtab.active{border:0;background:#f1ebf8;color:#5c3593;box-shadow:none}
.nav-subtab.active:before{background:#8050b6}
.lesson-mode-switch{justify-content:flex-start;margin:18px auto 0 0}
@media(max-width:740px){.nav-title{justify-content:flex-start;min-height:35px;font-size:11px;padding-inline:9px}.nav-subtabs{width:100%;padding:2px 3px 6px 13px;align-items:stretch}.nav-subtab{min-height:33px;padding:7px 9px;font-size:10px}.lesson-mode-switch{margin:13px auto 0 0}}

/* Optional Arabic support: an unobtrusive help button beside key explanations. */
.arabic-help-inline{display:flex;align-items:flex-start;gap:8px;min-width:0}
.arabic-help-inline>p{flex:1;min-width:0}
.arabic-help-trigger{display:inline-grid;place-items:center;flex:0 0 25px;width:25px;height:25px;margin:2px 0 0 5px;padding:0;border:1px solid #e4dced;border-radius:50%;background:#f7f3fa;color:#67418f;font:600 13px/1 'DM Sans',Arial,sans-serif;cursor:pointer;vertical-align:middle;transition:background .16s,border-color .16s,transform .16s}
.arabic-help-trigger:hover,.arabic-help-trigger[aria-expanded="true"]{background:#eee6f5;border-color:#cfc0e0;transform:translateY(-1px)}
.arabic-help-trigger:focus-visible,.arabic-help-close:focus-visible{outline:3px solid #9a79bf;outline-offset:2px}
.formula-card+.arabic-help-trigger{display:flex;margin:8px 0 10px auto}
.grammar-note>.arabic-help-trigger{flex:none;margin:0 0 0 auto}
.tip-row .arabic-help-inline{margin-top:5px}
.arabic-help-popover{position:fixed;z-index:1000;max-width:calc(100vw - 28px);max-height:min(70vh,380px);overflow:auto;padding:15px 16px 16px;border:1px solid #e6ddeb;border-radius:15px;background:#fff;box-shadow:0 14px 38px #34244224;color:#393341;direction:rtl;text-align:right}
.arabic-help-popover[hidden]{display:none}
.arabic-help-popover-head{display:flex;align-items:center;justify-content:space-between;gap:14px;padding-bottom:9px;border-bottom:1px solid #f0ebf3}
.arabic-help-popover-head strong{color:#594076;font-size:14px;font-weight:700}
.arabic-help-popover p{margin:11px 0 0;color:#514b58;font-family:system-ui,-apple-system,'Segoe UI',Tahoma,Arial,sans-serif;font-size:15px;line-height:1.85;overflow-wrap:anywhere}
.arabic-help-close{display:grid;place-items:center;flex:none;width:29px;height:29px;padding:0;border:1px solid #e8e2ed;border-radius:50%;background:#faf8fb;color:#665a71;font:400 21px/1 Arial,sans-serif;cursor:pointer}
@media(max-width:740px){.arabic-help-trigger{width:28px;height:28px;flex-basis:28px;margin:2px 0 0 4px}.arabic-help-popover{max-height:65vh;padding:14px;border-radius:14px}.arabic-help-popover p{font-size:15px;line-height:1.9}.formula-card+.arabic-help-trigger{margin:8px 0 10px auto}}

/* A quieter first visit, with one clear start point and a simple lesson path. */
.topbar{position:relative}
.home-active .sidebar{display:none}
.home-active .app-shell{grid-template-columns:minmax(0,1fr)}
.home-active .welcome-view{grid-template-columns:minmax(0,1fr);max-width:920px;min-height:calc(100svh - 70px);padding:10vh 9% 12vh;column-gap:0}
.home-active .welcome-copy{max-width:720px;padding:0}
.home-active .welcome-copy h1{max-width:680px;margin:18px 0 14px;font-size:clamp(48px,7vw,76px);line-height:1.08;letter-spacing:-2.8px}
.home-active .welcome-copy h1 span{font:inherit;font-weight:600;font-style:normal;color:#7541d8;letter-spacing:inherit}
.home-active .welcome-description{max-width:590px;font-size:17px;line-height:1.7;margin:0 0 25px;color:#5f5a69}
.home-active .welcome-kicker{font-size:11px;letter-spacing:.7px;color:#6f647c}
.home-active .welcome-art{display:none}
.home-active .primary-button{min-height:54px;padding:15px 23px;font-size:15px;font-weight:700;border-radius:15px;box-shadow:0 7px 18px #7541d82a}
.sidebar-intro{padding-bottom:15px}
.nav-items.collapsed{display:none!important}
.sidebar-intro h2{margin:8px 0 5px;font-size:22px}
.sidebar-intro p{font-size:12px;line-height:1.6}
.group-heading{min-height:42px;height:auto;padding-block:4px;font-size:12px}
.nav-items{gap:3px}
.nav-title{min-height:39px;font-size:12px}
.nav-subtabs{padding:2px 4px 8px 14px;gap:3px}
.nav-subtab{min-height:34px;font-size:11px}
.reference-group{margin-top:4px}
.lesson-path-hint{margin:18px 0 19px;padding:12px 15px;border:1px solid #e8e3ed;border-radius:13px;background:#fff;color:#635d6d;font-size:13px;line-height:1.6}
.lesson-path-hint strong{color:#58339a}
.lesson-step-nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;width:100%;padding:14px 0 2px}
.lesson-step-nav>span{color:#797383;font-size:12px;text-align:center;white-space:nowrap}
.lesson-step-nav button{min-height:42px;padding:9px 14px;border:1px solid #e3dbea;border-radius:12px;background:#fff;color:#5b3b8c;font:600 13px/1.3 "SF Pro Rounded","SF Rounded",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;cursor:pointer}
.lesson-step-nav button:last-child{justify-self:end;border-color:#7041c0;background:#7041c0;color:#fff}
.lesson-step-nav button:hover:not(:disabled){filter:brightness(.97);transform:translateY(-1px)}
.lesson-step-nav button:disabled{opacity:.42;cursor:default}
.lesson-footer{padding-top:18px}
.practice-complete .lesson-step-nav{margin-top:22px;border-top:1px solid #e9e3ee}
.practice-complete .lesson-step-nav button:last-child{background:#7041c0}
@media(max-width:740px){
  .home-active .app-shell{margin-top:0;min-height:calc(100svh - 62px)}
  .home-active .welcome-view{min-height:calc(100svh - 62px);padding:12vh 24px}
  .home-active .welcome-copy h1{font-size:clamp(44px,12vw,60px);letter-spacing:-2px}
  .home-active .welcome-description{font-size:15px;line-height:1.7}
  .home-active .primary-button{width:100%;max-width:360px;min-height:54px;text-align:left}
  .home-active .primary-button span{float:right}
  .home-active .sidebar{display:none!important}
  .lesson-path-hint{margin:14px 0 17px;padding:11px 13px;font-size:12px}
  .lesson-step-nav{grid-template-columns:1fr 1fr;gap:8px}
  .lesson-step-nav>span{grid-column:1/-1;grid-row:1;font-size:11px}
  .lesson-step-nav button{width:100%;min-height:42px;padding:8px 9px;font-size:12px}
  .lesson-step-nav button:last-child{grid-column:2}
  .lesson-footer{padding-top:15px}
}