:root{
  --bg:#f6f7fb;--surface:#ffffff;--surface-2:#f0f2f8;--text:#161927;--muted:#73798d;
  --line:#e5e8f0;--primary:#5b5bf7;--primary-2:#7c5ce7;--primary-soft:#efefff;
  --success:#1f9d67;--warning:#d38b16;--danger:#c75555;--info:#3d7ad6;
  --radius-sm:10px;--radius-md:14px;--radius-lg:20px;--radius-xl:28px;
  --shadow-sm:0 6px 18px rgba(31,34,68,.05);--shadow-md:0 16px 40px rgba(31,34,68,.09);
  --sidebar:248px;--topbar:70px;--max:1280px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}.hidden{display:none!important}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em}.brand-mark{width:35px;height:35px;border-radius:11px;display:grid;place-items:center;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;font-weight:900;box-shadow:0 8px 22px rgba(91,91,247,.25)}.brand small{font-weight:500;color:var(--muted)}
.btn{border:0;border-radius:12px;padding:11px 15px;font-weight:800;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:.18s ease}.btn:hover{transform:translateY(-1px)}.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 9px 22px rgba(91,91,247,.2)}.btn-secondary{background:var(--surface);border:1px solid var(--line);color:var(--text)}.btn-soft{background:var(--primary-soft);color:#4d4ddd}.btn-danger{background:#fff0f0;color:var(--danger)}.btn-sm{padding:8px 11px;font-size:13px}.btn-block{width:100%}
.badge{display:inline-flex;align-items:center;gap:6px;padding:6px 9px;border-radius:999px;background:var(--primary-soft);color:#4d4ddd;font-size:12px;font-weight:800}.badge.success{background:#eaf8f2;color:var(--success)}.badge.warning{background:#fff6e6;color:var(--warning)}.badge.muted{background:#eef0f5;color:#6e7487}.badge.dark{background:#1f2238;color:#fff}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.card-pad{padding:22px}.section-title{display:flex;align-items:flex-end;justify-content:space-between;gap:18px;margin:0 0 16px}.section-title h2{margin:0;font-size:21px;letter-spacing:-.025em}.section-title p{margin:5px 0 0;color:var(--muted);font-size:14px}.link{color:var(--primary);font-weight:800;font-size:14px}.muted{color:var(--muted)}
/* Marketing */
.marketing{background:#fff}.marketing-nav{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,5vw);border-bottom:1px solid #eef0f5;position:sticky;top:0;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);z-index:30}.marketing-nav .nav-links{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:700}.language-select{border:1px solid var(--line);background:#fff;border-radius:11px;padding:9px 10px;color:var(--text);font-weight:700}.marketing-hero{max-width:1180px;margin:0 auto;padding:82px 24px 72px;display:grid;grid-template-columns:1.08fr .92fr;gap:58px;align-items:center}.marketing-hero h1{font-size:58px;line-height:1.02;letter-spacing:-.052em;margin:18px 0 18px}.marketing-hero h1 span{background:linear-gradient(135deg,#5353e8,#7b58e6);-webkit-background-clip:text;background-clip:text;color:transparent}.marketing-hero p{font-size:18px;line-height:1.72;color:#6d7386;max-width:640px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:28px 0 22px}.hero-points{display:flex;gap:18px;flex-wrap:wrap;color:#74798a;font-size:13px}.hero-preview{background:#171a2c;color:#fff;border-radius:28px;padding:20px;box-shadow:0 32px 70px rgba(27,30,58,.2);transform:rotate(1deg)}.preview-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.preview-top small{color:#9ca1bd}.preview-top h3{margin:5px 0 0;font-size:21px}.preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.preview-grid>div{background:#22263d;border:1px solid #31364f;border-radius:15px;padding:14px;font-size:20px}.preview-grid b{display:block;font-size:12px;margin-top:14px}.preview-today{margin-top:12px;background:linear-gradient(135deg,#5a5cf7,#7b5ae8);border-radius:17px;padding:17px}.preview-today .bar{height:7px;background:rgba(255,255,255,.22);border-radius:99px;overflow:hidden;margin:12px 0}.preview-today .bar i{display:block;width:42%;height:100%;background:#fff;border-radius:99px}.preview-bottom{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}.preview-bottom>div{background:#fff;color:#1b1e31;border-radius:14px;padding:14px}.preview-bottom small{color:#7a8091;display:block;margin-bottom:5px}.marketing-section{padding:78px 24px;text-align:center}.marketing-section.alt{background:#f7f8fc}.marketing-section .eyebrow{color:var(--primary);font-weight:900;font-size:12px;letter-spacing:.15em}.marketing-section h2{font-size:36px;letter-spacing:-.035em;margin:10px 0}.marketing-section>.lead{max-width:680px;margin:0 auto;color:var(--muted);line-height:1.7}.feature-grid,.step-grid{max-width:1160px;margin:36px auto 0;display:grid;gap:17px;text-align:left}.feature-grid{grid-template-columns:repeat(3,1fr)}.step-grid{grid-template-columns:repeat(4,1fr)}.feature-card,.step-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px}.feature-card .icon{font-size:28px}.feature-card h3,.step-card h3{font-size:18px;margin:17px 0 8px}.feature-card p,.step-card p{color:var(--muted);font-size:14px;line-height:1.65;margin:0}.step-card b{width:42px;height:42px;border-radius:12px;background:var(--primary-soft);color:var(--primary);display:grid;place-items:center}.marketing-cta{max-width:1160px;margin:68px auto 80px;padding:38px 42px;border-radius:28px;background:linear-gradient(135deg,#5557e8,#7458e7);color:#fff;display:flex;justify-content:space-between;align-items:center;gap:24px}.marketing-cta h2{font-size:32px;margin:7px 0}.marketing-cta p{margin:0;color:#e8e8ff}.marketing-footer{padding:26px;text-align:center;color:#8a8fa0;border-top:1px solid #eceef4;font-size:13px}
/* Auth */
.auth-page{min-height:100vh;display:grid;grid-template-columns:1fr 1fr;background:#fff}.auth-visual{background:linear-gradient(145deg,#20234a,#5a5cf6);color:#fff;padding:48px 8vw;display:flex;flex-direction:column;justify-content:space-between}.auth-visual h1{font-size:48px;line-height:1.05;margin:18px 0}.auth-visual p,.auth-visual li{color:#dfe0ff;line-height:1.7}.auth-visual ul{list-style:none;padding:0}.auth-form-wrap{display:flex;align-items:center;justify-content:center;padding:48px}.auth-box{width:min(430px,100%)}.auth-tabs{display:flex;background:#f1f2f7;padding:4px;border-radius:12px;margin:26px 0}.auth-tabs button{flex:1;border:0;background:transparent;padding:11px;border-radius:9px;font-weight:800}.auth-tabs button.active{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,.07)}.field{display:block;font-size:13px;font-weight:800;margin:14px 0}.field input,.field select{display:block;width:100%;margin-top:7px;border:1px solid #dfe2ec;border-radius:12px;padding:13px 14px;background:#fff}.message{margin:14px 0;padding:12px;border-radius:10px;background:#f2f3ff;color:#4f50c7;font-size:13px}.auth-lang{display:flex;justify-content:flex-end;margin-bottom:16px}
/* App Shell */
.app-body{background:var(--bg)}.app-shell{min-height:100vh}.sidebar{position:fixed;left:0;top:0;bottom:0;width:var(--sidebar);background:#fff;border-right:1px solid var(--line);z-index:50;display:flex;flex-direction:column}.sidebar-head{height:var(--topbar);display:flex;align-items:center;padding:0 20px;border-bottom:1px solid var(--line)}.sidebar-nav{padding:18px 13px;overflow:auto;flex:1}.nav-group{margin-bottom:20px}.nav-group-title{font-size:10px;color:#9a9fb0;font-weight:900;letter-spacing:.13em;padding:0 10px 8px}.nav-item{display:flex;align-items:center;gap:11px;padding:10px 11px;border-radius:11px;color:#5f6578;font-size:14px;font-weight:700;margin:2px 0}.nav-item:hover{background:#f5f6fb;color:#23263a}.nav-item.active{background:var(--primary-soft);color:#4f50d8}.nav-item .nav-icon{width:20px;text-align:center}.sidebar-foot{border-top:1px solid var(--line);padding:14px}.user-mini{display:flex;align-items:center;gap:10px;padding:9px}.avatar{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#5558e9,#835ee8);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:900}.user-mini b{font-size:13px;display:block;max-width:140px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.user-mini small{font-size:11px;color:var(--muted)}.topbar{position:fixed;left:var(--sidebar);right:0;top:0;height:var(--topbar);background:rgba(246,247,251,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);z-index:40;display:flex;align-items:center;justify-content:space-between;padding:0 28px}.topbar-left{display:flex;align-items:center;gap:12px}.topbar-title{font-weight:900;letter-spacing:-.02em}.topbar-actions{display:flex;align-items:center;gap:10px}.menu-btn{display:none;border:1px solid var(--line);background:#fff;width:40px;height:40px;border-radius:11px}.app-main{margin-left:var(--sidebar);padding:calc(var(--topbar) + 30px) 30px 60px;min-height:100vh}.content{max-width:var(--max);margin:0 auto}.page-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin:0 0 24px}.page-head h1{font-size:32px;letter-spacing:-.035em;margin:0}.page-head p{margin:8px 0 0;color:var(--muted);line-height:1.55}.page-actions{display:flex;gap:10px;flex-wrap:wrap}.dashboard-greeting{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:24px}.dashboard-greeting h1{font-size:34px;letter-spacing:-.035em;margin:5px 0 6px}.dashboard-greeting p{margin:0;color:var(--muted)}
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px}.metric{padding:19px}.metric-label{display:flex;justify-content:space-between;gap:10px;color:var(--muted);font-size:12px;font-weight:800}.metric-value{font-size:27px;font-weight:900;margin-top:10px;letter-spacing:-.03em}.metric-sub{font-size:12px;color:var(--muted);margin-top:5px}.dashboard-grid{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(300px,.75fr);gap:18px;align-items:start}.stack{display:grid;gap:18px}.today-list{display:grid;gap:10px}.study-row{display:grid;grid-template-columns:minmax(145px,1fr) 1.3fr auto;gap:14px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:14px}.study-row h4{margin:0 0 4px;font-size:14px}.study-row small{color:var(--muted)}.progress-track{height:8px;background:#edf0f5;border-radius:99px;overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--primary-2));border-radius:99px}.progress-meta{display:flex;justify-content:space-between;color:var(--muted);font-size:11px;margin-top:6px}.skill-row{display:grid;grid-template-columns:88px 1fr 42px;gap:12px;align-items:center;margin:14px 0}.skill-row b{font-size:13px}.skill-row span{font-size:12px;color:var(--muted);text-align:right}.weak-list,.chips{display:flex;gap:8px;flex-wrap:wrap}.activity-list{display:grid}.activity-item{display:grid;grid-template-columns:1fr auto;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}.activity-item:last-child{border-bottom:0}.activity-item b{font-size:14px}.activity-item small{color:var(--muted);display:block;margin-top:4px}.activity-score{font-weight:900;color:#393d52}.quick-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.quick-card{padding:16px;border:1px solid var(--line);border-radius:15px;background:#fff}.quick-card h4{margin:6px 0 4px}.quick-card small{color:var(--muted)}.quick-card .link{display:block;margin-top:12px}
/* Generic Pages */
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:18px}.filter{background:#fff;border:1px solid var(--line);border-radius:12px;padding:10px 12px;min-width:145px}.filter label{font-size:10px;color:var(--muted);font-weight:900;display:block;margin-bottom:5px;text-transform:uppercase;letter-spacing:.06em}.filter select,.filter input{border:0;outline:0;background:transparent;width:100%;font-weight:700;color:var(--text)}.page-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.module-card{padding:22px;display:flex;flex-direction:column;min-height:188px}.module-card .module-icon{font-size:30px}.module-card h3{margin:18px 0 7px;font-size:19px}.module-card p{color:var(--muted);font-size:14px;line-height:1.55;margin:0 0 20px}.module-card .link{margin-top:auto}.list-card{padding:18px;margin-bottom:12px}.vocab-grid,.grammar-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.word-card{padding:20px}.word-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}.word-main{font-size:25px;font-weight:900}.word-translation{font-size:16px;color:#4f5468;margin-top:8px}.word-example{margin-top:16px;padding:12px;background:#f7f8fc;border-radius:12px;font-size:13px;line-height:1.6}.word-actions{display:flex;gap:8px;margin-top:15px}.timeline{position:relative;padding-left:24px}.timeline:before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:#e5e7ef}.day-block{position:relative;margin-bottom:22px}.day-block:before{content:"";position:absolute;width:14px;height:14px;border-radius:50%;left:-24px;top:4px;background:var(--primary);box-shadow:0 0 0 4px var(--primary-soft)}.day-block h3{margin:0 0 10px}.day-task{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px}.day-task:last-child{border-bottom:0}.progress-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.chart-placeholder{height:250px;display:flex;align-items:flex-end;gap:12px;padding:26px 20px 18px;background:linear-gradient(180deg,#fafbff,#f4f5fb);border-radius:16px}.chart-bar{flex:1;background:linear-gradient(180deg,#7779fa,#5759e8);border-radius:9px 9px 3px 3px;min-height:35px;position:relative}.chart-bar small{position:absolute;bottom:-24px;left:50%;transform:translateX(-50%);color:var(--muted);font-size:10px}.error-row{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center;padding:18px;border-bottom:1px solid var(--line)}.error-row:last-child{border-bottom:0}.error-row h4{margin:0 0 6px}.error-row p{margin:0;color:var(--muted);font-size:13px}.error-actions{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.premium-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;max-width:900px}.price-card{padding:28px}.price-card.featured{border-color:#b8b9ff;box-shadow:0 16px 45px rgba(91,91,247,.12)}.price-card ul{padding-left:20px;color:#5f6577;line-height:2}.profile-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-card{padding:22px}.form-row{margin-bottom:15px}.form-row label{display:block;font-size:12px;font-weight:800;margin-bottom:7px}.form-row input,.form-row select{width:100%;border:1px solid var(--line);border-radius:11px;padding:11px 12px;background:#fff}.coming{min-height:430px;display:grid;place-items:center;text-align:center;padding:40px}.coming .orb{width:90px;height:90px;border-radius:28px;background:linear-gradient(135deg,#585af4,#895fea);display:grid;place-items:center;color:#fff;font-size:38px;margin:0 auto 24px;box-shadow:0 20px 45px rgba(91,91,247,.25)}.coming h2{font-size:30px;margin:0 0 10px}.coming p{max-width:620px;color:var(--muted);line-height:1.7}.coming ul{text-align:left;max-width:520px;margin:22px auto;color:#616679;line-height:1.8}
/* Mobile */
.mobile-overlay{display:none;position:fixed;inset:0;background:rgba(20,22,38,.38);z-index:45}.mobile-overlay.show{display:block}
@media(max-width:1050px){.marketing-hero{grid-template-columns:1fr;padding-top:58px}.hero-preview{max-width:680px;width:100%;margin:auto;transform:none}.feature-grid{grid-template-columns:repeat(2,1fr)}.step-grid{grid-template-columns:repeat(2,1fr)}.metric-grid{grid-template-columns:repeat(2,1fr)}.dashboard-grid{grid-template-columns:1fr}.page-grid{grid-template-columns:repeat(2,1fr)}.quick-grid{grid-template-columns:repeat(2,1fr)}.progress-stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:860px){:root{--sidebar:0px}.sidebar{transform:translateX(-100%);width:260px;transition:.2s ease}.sidebar.open{transform:translateX(0)}.topbar{left:0;padding:0 16px}.menu-btn{display:grid;place-items:center}.app-main{margin-left:0;padding:calc(var(--topbar) + 22px) 16px 48px}.marketing-nav{padding:0 16px}.marketing-nav .nav-links>a:not(.btn){display:none}.auth-page{grid-template-columns:1fr}.auth-visual{display:none}.auth-form-wrap{padding:30px 22px}.page-head,.dashboard-greeting{flex-direction:column;align-items:flex-start}.vocab-grid,.grammar-grid,.profile-grid,.premium-grid{grid-template-columns:1fr}.study-row{grid-template-columns:1fr}.error-row{grid-template-columns:1fr}.error-actions{justify-content:flex-start}}
@media(max-width:600px){.marketing-hero{padding:52px 18px}.marketing-hero h1{font-size:42px}.marketing-hero p{font-size:16px}.preview-grid{grid-template-columns:1fr}.feature-grid,.step-grid,.page-grid,.metric-grid,.progress-stats,.quick-grid{grid-template-columns:1fr}.marketing-section{padding:60px 18px}.marketing-section h2{font-size:30px}.marketing-cta{margin:50px 18px 60px;padding:28px 24px;flex-direction:column;align-items:flex-start}.marketing-cta .btn{width:100%}.topbar-title{display:none}.topbar-actions .btn-secondary{display:none}.page-head h1,.dashboard-greeting h1{font-size:28px}.section-title{align-items:flex-start;flex-direction:column}.sidebar{width:min(86vw,290px)}.hero-actions .btn{width:100%}}
/* Preserved legacy role panel (not part of Stage 1 navigation) */
.dash-bg{min-height:100vh;background:#f5f6fb}.dash-nav{height:72px;background:#fff;border-bottom:1px solid #e6e8f1;display:flex;align-items:center;justify-content:space-between;padding:0 5vw}.dash-nav .nav-user{display:flex;gap:14px;align-items:center}.role-badge{font-size:12px;font-weight:900;padding:7px 10px;border-radius:999px;background:#eeeefe;color:#4b4bd3}.dash{max-width:1180px;margin:0 auto;padding:42px 24px 70px}.welcome{display:flex;justify-content:space-between;gap:24px;align-items:flex-start;margin-bottom:28px}.welcome h1{margin:6px 0 8px;font-size:36px}.goal{background:#fff;border:1px solid #e5e7f0;padding:12px 16px;border-radius:14px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}.stat-card{background:#fff;border:1px solid #e6e8f1;border-radius:18px;padding:20px;display:flex;gap:13px;align-items:center}.stat-card b{display:block;font-size:26px}.stat-card small{color:#777d90}.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.dash-card{background:#fff;border:1px solid #e6e8f1;border-radius:20px;padding:24px;min-height:185px}.dash-card h3{font-size:20px;margin:18px 0 7px}.dash-card p{font-size:14px;line-height:1.5;color:#72778a}.dash-card b{font-size:14px;color:#5b5bf7}.progress{margin-top:22px;background:#171a2c;color:#fff;border-radius:22px;padding:28px 32px;display:flex;justify-content:space-between;align-items:center}.progress-ring{width:90px;height:90px;border:8px solid #6264ff;border-radius:50%;display:flex;flex-direction:column;justify-content:center;align-items:center}@media(max-width:900px){.dash-grid,.stat-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:560px){.dash-grid,.stat-grid{grid-template-columns:1fr}.dash-nav #userEmail{display:none}.welcome{flex-direction:column}.dash{padding:28px 16px}}