:root{--ink:#20374f;--blue:#173f63;--teal:#008573;--mint:#e8faf6;--coral:#d94538;--pink:#fff0ee;--yellow:#ffc44d;--line:#cfe3ec;--muted:#536a7a;--sky:#eaf8ff}
*{box-sizing:border-box}body{margin:0;color:var(--ink);background:#f6fbfe;font-family:'Avenir Next','Trebuchet MS','PingFang SC',sans-serif;letter-spacing:0}button,select,input{font:inherit;color:inherit}button,select{min-height:44px}button{cursor:pointer;border:1px solid var(--line);background:white;border-radius:6px;padding:9px 15px;font-weight:700}button:hover{border-color:var(--teal);background:var(--mint)}button:disabled{cursor:default;opacity:.55}button.primary{background:var(--teal);color:white;border-color:var(--teal)}button.icon{width:44px;padding:0;flex-shrink:0}:focus-visible{outline:3px solid #e29b00;outline-offset:3px}a{color:var(--blue)}input,select{border:1px solid var(--line);border-radius:6px;padding:10px;min-width:0;background:white}input{min-height:48px}
header{border-top:6px solid var(--yellow);background:white;border-bottom:1px solid var(--line)}.head-inner{max-width:1200px;margin:auto;padding:18px 24px;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px}.brand{font-size:28px;font-weight:900;color:var(--blue)}.brand b{color:var(--teal)}.brand small{display:block;font-size:12px;font-weight:600;color:var(--muted);margin-top:4px}.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:13px}#audioStatus{flex-basis:100%;text-align:right;color:var(--muted);min-height:18px}.main-nav{max-width:1200px;margin:auto;display:flex;gap:6px;padding:0 24px;overflow:auto}.main-nav button{border:0;border-radius:0;border-bottom:4px solid transparent;white-space:nowrap;padding:12px 20px}.main-nav button[aria-selected=true]{border-bottom-color:var(--teal);color:var(--teal)}
main{max-width:1200px;margin:0 auto;padding:24px}h1{font-size:26px;margin:0;line-height:1.5}h2{font-size:21px;margin:0 0 12px}h3{font-size:18px;margin:0}p{line-height:1.7}.muted{color:var(--muted);font-size:14px}.page-heading{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;align-items:center;margin-bottom:20px}.page-heading p{margin:4px 0 0}.goal{font-size:14px;display:flex;align-items:center;gap:8px}.notice{background:var(--pink);padding:12px 16px;border-left:4px solid var(--coral);margin:12px 0;font-size:14px}.notice:empty{display:none}.metrics{display:flex;flex-wrap:wrap;align-items:center;gap:24px;padding:16px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-bottom:24px}.metrics strong{font-size:24px;color:var(--blue);margin-right:6px}.metrics span{font-size:13px}progress{height:10px;accent-color:var(--teal);border:0;border-radius:0;overflow:hidden;width:100%}
.task-tabs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:20px}.task-tabs button{text-align:left;border:2px solid var(--line);padding:14px 16px;background:white}.task-tabs button[aria-selected=true]{border-color:var(--teal);background:var(--mint)}.task-tabs button:nth-child(3)[aria-selected=true]{border-color:var(--coral);background:var(--pink)}.task-tabs strong{font-size:20px;display:block;margin-top:4px}.task-tabs span{font-size:13px;color:var(--muted)}
.workbench{display:grid;grid-template-columns:240px minmax(0,1fr);background:white;border-top:3px solid var(--teal);border-bottom:1px solid var(--line);min-height:550px}.lesson-list{padding:16px;border-right:1px solid var(--line);min-width:0}.group-tabs{display:flex;gap:6px;margin-bottom:14px}.group-tabs button{flex:1;padding:6px;font-size:13px}.group-tabs button[aria-pressed=true]{background:var(--blue);color:white}.word-queue{display:grid;gap:5px}.word-queue button{display:flex;gap:8px;align-items:center;text-align:left;padding:9px;font-size:14px;overflow-wrap:anywhere}.word-queue button[aria-current=true]{background:var(--mint);border-color:var(--teal)}.word-queue .number{font-size:12px;color:var(--muted);width:22px;flex-shrink:0}.word-queue .tick{margin-left:auto;color:var(--teal)}.lesson{padding:24px 30px;min-width:0}.lesson-bar{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:space-between;padding-bottom:16px;border-bottom:1px solid var(--line);margin-bottom:20px}.lesson-bar .switch{display:flex;gap:4px}.switch button[aria-pressed=true],.quiz-types button[aria-pressed=true]{background:var(--blue);color:white}
.entry-title{font-size:32px;overflow-wrap:anywhere;margin:12px 0 6px}.entry-title button{vertical-align:middle}.entry-meaning{font-size:18px;margin:6px 0}.sentence{font-family:Georgia,'Times New Roman',serif;font-size:24px;line-height:1.85;overflow-wrap:anywhere}mark{color:inherit;background:#fff5d6;border-bottom:3px solid var(--yellow);padding:0 2px}.audio-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin:18px 0}.audio-row audio{width:min(100%,340px);height:54px;min-width:0}.audio-row label{font-size:13px}.audio-row select{padding:8px}summary{cursor:pointer;min-height:44px;padding-top:12px}.translation{font-size:17px}.usage{font-size:14px;color:var(--muted)}.lesson-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:24px}.quiz-types{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:24px}.quiz-types button{font-size:13px;padding:8px 12px}.quiz-prompt{font-size:23px;line-height:1.6;margin:12px 0 20px;overflow-wrap:anywhere}.choices{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.choices button{min-height:64px;text-align:left;padding:14px;overflow-wrap:anywhere}.answer-row{display:flex;flex-wrap:wrap;gap:10px}.answer-row input{flex:1;min-width:140px}.feedback{margin-top:20px;padding:16px;background:var(--mint);border-left:4px solid var(--teal)}.feedback.wrong{background:var(--pink);border-color:var(--coral)}.feedback:empty{display:none}.feedback p{margin:8px 0}
.empty{padding:32px 10px;text-align:center}.empty h2{margin-bottom:10px}.forecast{margin-top:32px}.forecast-grid{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}.forecast-grid button{text-align:left;padding:12px;min-height:120px;font-size:13px}.forecast-grid button strong{display:block;margin:5px 0;font-size:17px}.forecast-grid button span{display:block;margin-top:5px;color:var(--muted)}.forecast-grid button:first-child{border-top:4px solid var(--yellow)}.unit-row{padding:20px 0;border-bottom:1px solid var(--line)}.unit-row h3{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px}.unit-row progress{max-width:480px;display:block;margin:10px 0}.catalogue-words{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;padding:12px 0}.catalogue-words button{text-align:left;overflow-wrap:anywhere}.catalogue-words small{display:block;color:var(--muted);font-size:12px;margin-top:4px}table{border-collapse:collapse;width:100%;font-size:14px}th,td{padding:12px;text-align:left;border-bottom:1px solid var(--line)}.table-wrap{overflow:auto}
footer{border-top:1px solid var(--line);padding:20px 24px;font-size:12px;line-height:1.8;color:var(--muted);max-width:1200px;margin:auto}dialog{border:1px solid var(--line);border-radius:8px;padding:24px;width:min(700px,calc(100vw - 24px));max-height:85vh;color:var(--ink)}dialog::backdrop{background:rgba(20,40,55,.4)}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:14px}#translationTip{position:fixed;z-index:10;background:var(--blue);color:white;padding:10px 14px;border-radius:6px;max-width:calc(100vw - 24px);font-size:14px;pointer-events:none}[hidden]{display:none!important}
@media(max-width:900px){.forecast-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.workbench{grid-template-columns:190px minmax(0,1fr)}.lesson{padding:22px}}
@media(max-width:600px){main{padding:18px 12px}.head-inner{padding:16px}.main-nav{padding:0 8px}.main-nav button{padding:12px 13px;font-size:14px}.header-actions{width:100%}#audioStatus{text-align:left}h1{font-size:23px}.task-tabs{gap:6px}.task-tabs button{padding:10px 8px;font-size:14px}.task-tabs strong{font-size:18px}.workbench{grid-template-columns:1fr}.lesson-list{border-right:0;border-bottom:1px solid var(--line);padding:12px}.group-tabs{max-width:280px}.word-queue{grid-template-columns:repeat(5,minmax(0,1fr));gap:4px}.word-queue button{justify-content:center;padding:8px 2px;min-height:44px}.word-queue .queue-name{display:none}.word-queue .number{width:auto;font-size:14px}.word-queue .tick{margin:0;font-size:12px}.lesson{padding:20px 16px}.entry-title{font-size:29px}.sentence{font-size:22px}.choices{grid-template-columns:1fr}.forecast-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalogue-words{grid-template-columns:repeat(2,minmax(0,1fr))}.metrics{gap:18px}.metrics strong{font-size:21px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.group-tabs{flex-wrap:wrap}.group-tabs button{flex:1 0 44px}
.task-tabs strong span{display:block;font-size:12px;margin-top:4px}progress{appearance:none}progress::-webkit-progress-bar{background:var(--line)}progress::-webkit-progress-value{background:var(--teal)}progress::-moz-progress-bar{background:var(--teal)}
@media(max-width:600px){.main-nav button{padding:12px 8px}}