:root{--ink:#262438;--muted:#757286;--line:#e8e6ef;--bg:#f6f7fb;--panel:#fff;--purple:#6651d5;--purple-dark:#4f3db7;--purple-soft:#eeebff;--berry:#c74373;--mint:#e8f7f0;--green:#2d8560;--peach:#fff1e8;--red:#b94852;--shadow:0 15px 45px rgba(42,35,83,.08);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);font-size:16px}
*{box-sizing:border-box}body{margin:0;background:var(--bg);line-height:1.5}button,input,textarea{font:inherit}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}h1,h2,h3,h4,p{margin-top:0}h1{font-size:clamp(2rem,4vw,3rem);line-height:1.08;letter-spacing:-.04em;margin-bottom:.6rem}h2{font-size:1.4rem;line-height:1.2;letter-spacing:-.02em}h3{font-size:1.05rem}small{color:var(--muted)}
.app-shell{min-height:100vh;display:grid;grid-template-columns:255px minmax(0,1fr)}.sidebar{position:sticky;top:0;height:100vh;background:#262238;color:white;padding:24px 16px;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:1.1rem;padding:0 8px}.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:linear-gradient(145deg,#8b75f1,#c84d85);color:white;font-family:Georgia,serif;font-size:1.7rem}.profile{display:flex;align-items:center;gap:12px;padding:22px 8px;margin:20px 0;border-top:1px solid rgba(255,255,255,.1);border-bottom:1px solid rgba(255,255,255,.1)}.profile span:last-child{display:flex;flex-direction:column}.profile small{color:#bbb5d2}.avatar{display:grid;place-items:center;flex:0 0 auto;width:44px;height:44px;border-radius:50%;background:#f0edff;color:var(--purple);font-weight:800}.avatar.large{width:58px;height:58px;font-size:1.35rem}.sidebar nav{display:grid;gap:8px}.sidebar nav a,.nav-button{display:flex;gap:12px;align-items:center;width:100%;border:0;background:transparent;color:#d8d4e5;border-radius:12px;padding:11px 12px;text-align:left;cursor:pointer}.sidebar nav a:hover,.nav-button:hover{background:rgba(255,255,255,.08);color:white}.sidebar-foot{margin-top:auto}.main{min-width:0}.topbar{height:68px;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:0 30px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:5;font-weight:700}.saved-chip{font-size:.83rem;font-weight:600;color:var(--green);background:var(--mint);padding:7px 11px;border-radius:999px}.page-wrap{padding:32px;max-width:1420px;margin:0 auto}.mobile-nav{display:none}
.page-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;margin-bottom:24px}.page-head p{color:var(--muted);max-width:680px}.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-weight:800;font-size:.75rem;color:var(--purple);margin-bottom:8px}.eyebrow.light{color:#dcd5ff}.primary,.secondary,.soft,.danger,.button{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:11px 17px;font-weight:750;cursor:pointer;transition:.18s transform,.18s background}.primary{background:var(--purple);color:white}.primary:hover{background:var(--purple-dark);transform:translateY(-1px)}.secondary{background:white;border:1px solid var(--line);color:var(--ink)}.soft{background:var(--purple-soft);color:var(--purple-dark)}.danger{background:#fff0f1;color:var(--red)}.small{padding:8px 13px;font-size:.9rem}.wide-button{width:100%}.back{display:inline-block;color:var(--purple);font-weight:750;margin-bottom:20px}.text-link{color:var(--purple);font-weight:750}
.summary-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:20px 0 26px}.summary{background:var(--panel);border:1px solid var(--line);border-radius:18px;padding:19px;box-shadow:0 8px 24px rgba(42,35,83,.03)}.summary strong{display:block;font-size:1.75rem;line-height:1.15}.summary span{color:var(--muted);font-size:.9rem}.student-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.student-card{display:flex;flex-direction:column;gap:17px;background:var(--panel);border:1px solid var(--line);border-radius:21px;padding:21px;box-shadow:var(--shadow);transition:.2s transform,.2s box-shadow}.student-card:hover{transform:translateY(-3px);box-shadow:0 18px 55px rgba(42,35,83,.13)}.student-card-top{display:flex;align-items:center;gap:12px}.student-card-top h3{margin:0}.student-card-top small{display:block}.category-badges{display:flex;gap:7px;flex-wrap:wrap}.category-badge{font-size:.76rem;font-weight:750;padding:6px 9px;border-radius:999px}.category-badge.words{background:var(--purple-soft);color:var(--purple-dark)}.category-badge.verbs{background:var(--peach);color:#9a5735}.student-card-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.student-card-stats span{font-size:.72rem;color:var(--muted)}.student-card-stats b{display:block;color:var(--ink);font-size:1.1rem}.student-card-link{color:var(--purple);font-weight:750;font-size:.9rem}
.panel,.category-block{background:var(--panel);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow)}.panel{padding:24px}.category-block{padding:24px;margin:20px 0}.student-head{display:flex;align-items:center;gap:16px}.student-head>div{flex:1}.student-head h1{font-size:2rem;margin:0}.student-head p{margin:0;color:var(--muted)}.status{display:inline-flex;width:max-content;align-items:center;border-radius:999px;padding:5px 9px;font-size:.76rem;font-weight:800}.status.active,.status.mastered{background:var(--mint);color:var(--green)}.status.new{background:#e8f1ff;color:#326aa8}.status.updated{background:#f2ebff;color:#714bbb}.status.learning{background:#fff3dc;color:#9b681f}.status.problem{background:#fff0f1;color:var(--red)}.category-head{display:flex;justify-content:space-between;align-items:center;gap:18px;margin-bottom:20px}.category-title{display:flex;align-items:center;gap:12px}.category-title h2,.category-title p{margin:0}.category-title p{color:var(--muted)}.category-icon,.learning-icon{display:grid;place-items:center;width:47px;height:47px;border-radius:14px;background:var(--purple-soft);color:var(--purple);font-weight:900}.category-icon.verbs{background:var(--peach);color:#a7633e}
.form{display:grid;gap:15px}.form label,.login-card label{display:grid;gap:7px;font-weight:700;font-size:.9rem}.form input,.form textarea,.login-card input,.answer-input,.answer-grid input{width:100%;border:1px solid #dcd9e6;border-radius:12px;padding:12px 13px;background:white;color:var(--ink);outline:none}.form input:focus,.form textarea:focus,.login-card input:focus,.answer-input:focus,.answer-grid input:focus{border-color:var(--purple);box-shadow:0 0 0 3px rgba(102,81,213,.12)}textarea{min-height:135px;resize:vertical}.form-panel{max-width:650px;margin:30px auto}.compact-form{max-width:560px}.two-column{display:grid;grid-template-columns:1.05fr .95fr;gap:22px;align-items:stretch}.spaced-note{display:flex;gap:14px;background:#f7f5ff;border:1px solid #e3defd;border-radius:17px;padding:18px}.spaced-note>span{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:var(--purple);color:white;font-weight:900;flex:0 0 auto}.spaced-note p{margin:5px 0 0;color:var(--muted)}.warning-box,.success-box,.credential-box{border-radius:14px;padding:14px 16px;margin:14px 0}.warning-box{background:#fff4e7;color:#86552e;border:1px solid #f2d8b9}.success-box{background:var(--mint);color:#286f51;border:1px solid #bfe4d2}.credential-box{background:#f7f5ff;border:1px solid #dcd5ff}.credential-box dl{display:grid;grid-template-columns:max-content 1fr;gap:8px 15px;margin-bottom:0}.credential-box dt{color:var(--muted)}.credential-box dd{margin:0;font-weight:750}.credential-box code{background:white;padding:4px 7px;border-radius:7px}.conflict-stack{margin-top:22px}.conflict-box{background:#fffaf3;border:1px solid #ecd5b1;border-radius:17px;padding:17px;margin:12px 0}.conflict-box h4{margin-bottom:7px}.conflict-actions{display:flex;gap:8px;flex-wrap:wrap}.check-list{display:grid;gap:10px;margin-bottom:16px}.check-row{display:flex;align-items:center;gap:12px;padding:13px;border:1px solid var(--line);border-radius:14px;cursor:pointer}.check-row input{width:18px;height:18px;accent-color:var(--purple)}.check-row span{display:flex;flex-direction:column}
.section-title{display:flex;justify-content:space-between;align-items:center;margin:25px 0 12px}.section-title h2{margin:0}.month-strip{display:flex;gap:9px;overflow-x:auto;padding-bottom:5px;margin-bottom:14px}.month-chip{white-space:nowrap;border:1px solid var(--line);background:white;border-radius:999px;padding:8px 12px;font-size:.84rem;font-weight:700}.month-chip.active{background:var(--purple);color:white;border-color:var(--purple)}.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px}table{width:100%;border-collapse:collapse;min-width:680px}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:.76rem;text-transform:uppercase;letter-spacing:.05em;color:var(--muted);background:#fafafd}tbody tr:last-child td{border-bottom:0}td small{display:block;margin-top:5px}.split-layout{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(310px,.7fr);gap:22px;align-items:start}.set-grid,.learning-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.set-card,.learning-card{background:white;border:1px solid var(--line);border-radius:18px;padding:18px}.set-number{display:grid;place-items:center;width:45px;height:45px;background:var(--purple-soft);color:var(--purple);border-radius:14px;font-weight:900;margin-bottom:13px}.learning-card{display:flex;align-items:center;gap:14px}.learning-card>div{flex:1}.learning-card h3,.learning-card p{margin:0}.empty-note{padding:22px;border:1px dashed #cbc6dc;border-radius:15px;color:var(--muted);background:#fbfbfd}
.student-hero{display:flex;align-items:center;justify-content:space-between;gap:30px;background:linear-gradient(135deg,#443584,#7561da 65%,#ad5c99);color:white;border-radius:26px;padding:31px;box-shadow:var(--shadow)}.student-hero h1{margin-bottom:10px}.student-hero p{margin:0;max-width:600px;color:#e6e2fb}.streak{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.13);padding:17px 20px;border-radius:18px}.streak strong{font-size:2.6rem}.streak span{font-size:.85rem;line-height:1.25}.today-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:18px}.today-card{border:1px solid var(--line);border-radius:16px;padding:16px;background:#fbfbfd}.today-card strong{display:block;font-size:1.65rem}.today-card span{color:var(--muted)}.today-card.fresh{background:#f0f5ff}.today-card.due{background:#fff5ed}
.trainer-top{display:flex;align-items:flex-start;justify-content:space-between;gap:22px;margin-bottom:20px}.score{display:flex;gap:10px}.score span{background:white;border:1px solid var(--line);border-radius:13px;padding:10px 13px;color:var(--muted)}.score b{color:var(--ink)}.segment{display:flex;gap:8px;margin-bottom:18px}.segment a{background:white;border:1px solid var(--line);border-radius:12px;padding:9px 14px;font-weight:700}.trainer-stage{display:grid;place-items:center;min-height:420px;background:linear-gradient(145deg,#f2efff,#fff);border:1px solid var(--line);border-radius:24px;padding:30px}.quiz-box{width:min(650px,100%);text-align:center;background:white;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:23px;padding:30px}.question-label{color:var(--muted);font-weight:700}.question-word{font-size:clamp(2rem,6vw,3.6rem);font-weight:850;letter-spacing:-.04em;margin:25px 0}.answer-input{font-size:1.15rem}.answer-grid{display:grid;gap:10px}.answer-grid.three{grid-template-columns:repeat(3,1fr)}.feedback{margin:15px 0;padding:13px;border-radius:12px;font-weight:700}.feedback.ok{background:var(--mint);color:var(--green)}.feedback.bad{background:#fff0f1;color:var(--red)}.trainer-controls{display:flex;justify-content:center;gap:10px;margin-top:18px}.completion-card{max-width:650px;margin:70px auto;text-align:center;background:white;border:1px solid var(--line);border-radius:24px;padding:45px;box-shadow:var(--shadow)}.completion-card>span{display:grid;place-items:center;width:70px;height:70px;border-radius:50%;background:var(--mint);color:var(--green);font-size:2rem;margin:0 auto 20px}
.login-shell{min-height:100vh;display:grid;grid-template-columns:1.08fr .92fr;background:white}.login-visual{padding:48px;display:flex;flex-direction:column;justify-content:space-between;background:linear-gradient(145deg,#302657,#5943ac 58%,#b84e82);color:white}.login-visual>div:last-child{max-width:700px}.login-visual h1{font-size:clamp(3rem,7vw,6rem);max-width:850px}.login-visual p{font-size:1.15rem;color:#e2dcfa}.visual-chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:25px}.visual-chips span{background:rgba(255,255,255,.13);border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:8px 12px;font-size:.85rem}.login-panel{display:grid;place-items:center;padding:30px}.login-card{display:grid;gap:15px;width:min(420px,100%);padding:30px;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow)}.login-card h2{font-size:2rem;margin-bottom:0}.login-card>p:not(.eyebrow){color:var(--muted)}.login-note{text-align:center}
@media(max-width:1100px){.student-card-grid{grid-template-columns:repeat(2,1fr)}.split-layout{grid-template-columns:1fr}.summary-grid{grid-template-columns:repeat(2,1fr)}.page-wrap{padding:24px}.login-shell{grid-template-columns:1fr 1fr}.login-visual{padding:35px}.login-visual h1{font-size:3.5rem}}
@media(max-width:760px){:root{font-size:15px}.app-shell{display:block}.sidebar{height:auto;position:static;padding:15px 18px;display:flex;flex-direction:row;align-items:center}.sidebar .profile,.sidebar nav,.sidebar-foot{display:none}.main{padding-bottom:67px}.topbar{height:58px;padding:0 17px}.topbar>span:first-child{max-width:55%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.saved-chip{font-size:.7rem}.page-wrap{padding:18px 14px}.mobile-nav{display:grid;grid-template-columns:repeat(3,1fr);position:fixed;bottom:0;left:0;right:0;z-index:10;background:white;border-top:1px solid var(--line);box-shadow:0 -10px 30px rgba(42,35,83,.08)}.mobile-nav a,.mobile-nav button{display:flex;align-items:center;justify-content:center;border:0;background:white;min-height:58px;font-size:.78rem;color:var(--muted)}.mobile-nav form{display:contents}.page-head,.category-head,.trainer-top{flex-direction:column}.page-head .button,.category-head .button{width:100%}.summary-grid{gap:9px}.summary{padding:15px}.student-card-grid,.set-grid,.learning-grid,.two-column{grid-template-columns:1fr}.category-block,.panel{padding:18px;border-radius:18px}.student-hero{align-items:flex-start;padding:23px;flex-direction:column}.streak{width:100%;justify-content:center}.today-grid{gap:7px}.today-card{padding:13px}.student-head{flex-wrap:wrap}.student-head>div{min-width:50%}.answer-grid.three{grid-template-columns:1fr}.trainer-stage{padding:14px;min-height:360px}.quiz-box{padding:22px 16px}.score{width:100%}.score span{flex:1}.login-shell{grid-template-columns:1fr}.login-visual{min-height:43vh;padding:25px}.login-visual h1{font-size:2.8rem}.login-panel{padding:18px}.login-card{padding:22px;box-shadow:none}.conflict-actions{display:grid}.conflict-actions button{width:100%}.credential-box dl{grid-template-columns:1fr}.credential-box dd{margin-bottom:8px}}
.mode-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.mode-card{display:flex;flex-direction:column;gap:6px;padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff;transition:.2s}.mode-card:hover{border-color:var(--purple);transform:translateY(-2px)}.mode-card span{font-size:.83rem;color:var(--muted)}.flash-translation{font-size:1.35rem;color:var(--purple-dark);background:var(--purple-soft);border-radius:14px;padding:16px;margin:0 0 24px}.choice-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.choice-button{border:1px solid var(--line);background:#fff;border-radius:13px;padding:14px;font-weight:700;cursor:pointer;color:var(--ink)}.choice-button:hover{border-color:var(--purple);background:var(--purple-soft)}
@media(max-width:760px){.mode-grid,.choice-grid{grid-template-columns:1fr}.trainer-controls{flex-direction:column}.trainer-controls>*{width:100%}}
.swipe-card-wrap{width:min(390px,100%);margin:20px auto 10px;touch-action:pan-y}.flip-card{height:270px;perspective:1100px;cursor:pointer;user-select:none;transition:transform .2s ease}.flip-card.dragging{transition:none}.flip-card-inner{position:relative;width:100%;height:100%;transition:transform .55s;transform-style:preserve-3d}.flip-card.flipped .flip-card-inner{transform:rotateY(180deg)}.flip-face{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:13px;padding:28px;border:1px solid var(--line);border-radius:24px;backface-visibility:hidden;box-shadow:0 18px 50px rgba(42,35,83,.13);background:linear-gradient(145deg,#fff,#f4f1ff)}.flip-back{transform:rotateY(180deg);background:linear-gradient(145deg,#fff8fb,#f2efff)}.card-word,.card-translation{font-size:clamp(2rem,8vw,3.4rem);font-weight:850;line-height:1.08}.card-translation{font-size:clamp(1.55rem,6vw,2.5rem)}.flip-face small{color:var(--muted)}.audio-button{position:absolute;top:17px;right:17px;width:46px;height:46px;border:0;border-radius:50%;background:var(--purple-soft);font-size:1.25rem;cursor:pointer}.swipe-hint,.card-actions{display:flex;justify-content:space-between;gap:12px;width:min(390px,100%);margin:12px auto}.swipe-hint{color:var(--muted);font-size:.82rem}.card-actions>*{flex:1}.flip-card.swipe-know .flip-face{box-shadow:0 18px 50px rgba(42,160,110,.25);border-color:#9ed8bd}.flip-card.swipe-again .flip-face{box-shadow:0 18px 50px rgba(210,80,90,.22);border-color:#e5aeb4}
@media(max-width:900px){.mode-grid{grid-template-columns:repeat(2,1fr)}.trainer-stage{min-height:460px}.quiz-box{width:min(720px,100%)}}
@media(max-width:760px){.swipe-card-wrap{width:100%}.flip-card{height:min(58vh,330px)}.flip-face{padding:22px 17px}.card-actions{position:sticky;bottom:68px;background:white;padding:8px;border-radius:15px}.audio-button{width:50px;height:50px}.quiz-box{overflow:hidden}}
.resource-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:0 0 18px}.resource-button{display:flex;align-items:center;gap:13px;min-height:74px;padding:16px 18px;border-radius:17px;background:linear-gradient(135deg,#f0edff,#faf9ff);border:1px solid #ddd7ff;color:var(--purple-dark)}.resource-button.zoom{background:linear-gradient(135deg,#edf6ff,#fbfdff);border-color:#cfe4fa;color:#27689e}.resource-button>span{display:grid;place-items:center;width:42px;height:42px;border-radius:13px;background:white;font-size:1.25rem;box-shadow:0 5px 15px rgba(42,35,83,.08)}.resource-button.disabled{filter:grayscale(.35);opacity:.65;cursor:default}.link-form{grid-template-columns:1fr 1fr auto;align-items:end;padding:16px;border:1px solid var(--line);border-radius:16px;background:#fbfbfd;margin-bottom:18px}.link-form button{min-height:46px}.add-lesson{border:1px solid var(--line);border-radius:17px;padding:0 17px;margin:18px 0;background:#fff}.add-lesson>summary,.lesson-edit>summary{cursor:pointer;font-weight:800;color:var(--purple);padding:15px 0}.lesson-form{grid-template-columns:180px 1fr 1fr;align-items:start;padding:4px 0 18px}.lesson-form label:nth-of-type(3),.lesson-form label:nth-of-type(4){grid-column:span 1}.lesson-form textarea{min-height:105px}.lesson-form>button{align-self:end}.inline-checks{display:flex;gap:16px;flex-wrap:wrap;align-items:center}.form .inline-checks label{display:flex;grid-template-columns:none;align-items:center;gap:8px}.inline-checks input{width:18px;height:18px;accent-color:var(--purple)}.lesson-text{white-space:pre-line;min-width:180px}.lesson-edit{min-width:105px}.lesson-edit-form{width:min(440px,75vw);padding:8px 0 12px}.lesson-edit-form textarea{min-height:90px}.lesson-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.lesson-card{border:1px solid var(--line);border-radius:18px;padding:19px;background:linear-gradient(145deg,#fff,#fbfaff)}.lesson-card-date{display:inline-flex;color:var(--purple);background:var(--purple-soft);border-radius:999px;padding:5px 9px;font-size:.78rem;font-weight:800;margin-bottom:10px}.lesson-card h3{font-size:1.2rem;margin-bottom:16px}.lesson-info{border-top:1px solid var(--line);padding-top:12px;margin-top:12px}.lesson-info b{font-size:.82rem;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}.lesson-info p{white-space:pre-line;margin:6px 0 10px}.lesson-info.homework{background:#faf8ff;border-radius:13px;padding:13px;border-top:0}.student-learning{scroll-margin-top:80px}
@media(max-width:1050px){.link-form{grid-template-columns:1fr 1fr}.link-form button{grid-column:1/-1}.lesson-form{grid-template-columns:1fr 1fr}.lesson-form label:first-of-type{grid-column:1/-1}.lesson-form>button{grid-column:1/-1}}
@media(max-width:760px){.resource-grid,.link-form,.lesson-form,.lesson-card-grid{grid-template-columns:1fr}.link-form button,.lesson-form label:first-of-type,.lesson-form>button{grid-column:auto}.resource-button{min-height:68px}.lesson-table{border:0;overflow:visible}.lesson-table table,.lesson-table tbody,.lesson-table tr,.lesson-table td{display:block;min-width:0;width:100%}.lesson-table thead{display:none}.lesson-table tr{background:white;border:1px solid var(--line);border-radius:16px;padding:9px 14px;margin-bottom:12px;box-shadow:0 7px 20px rgba(42,35,83,.04)}.lesson-table td{display:grid;grid-template-columns:92px 1fr;gap:10px;padding:9px 0;border-bottom:1px solid var(--line)}.lesson-table td:last-child{border-bottom:0}.lesson-table td::before{content:attr(data-label);font-size:.74rem;font-weight:800;text-transform:uppercase;color:var(--muted)}.lesson-edit-form{width:100%;grid-column:1/-1}.lesson-edit{grid-column:1/-1}.inline-checks{display:grid;gap:10px}.add-lesson{padding:0 13px}}