@keyframes astroFadeInOut{0%{opacity:1}to{opacity:0}}@keyframes astroFadeIn{0%{opacity:0;mix-blend-mode:plus-lighter}to{opacity:1;mix-blend-mode:plus-lighter}}@keyframes astroFadeOut{0%{opacity:1;mix-blend-mode:plus-lighter}to{opacity:0;mix-blend-mode:plus-lighter}}@keyframes astroSlideFromRight{0%{transform:translate(100%)}}@keyframes astroSlideFromLeft{0%{transform:translate(-100%)}}@keyframes astroSlideToRight{to{transform:translate(100%)}}@keyframes astroSlideToLeft{to{transform:translate(-100%)}}@media 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var(--ease)}a.card:hover{box-shadow:var(--shadow);border-color:var(--c-border-strong);text-decoration:none;transform:translateY(-3px)}a.card:active{transform:translateY(-1px)scale(.99)}.btn{border-radius:var(--radius-sm);background:var(--grad-brand);color:#fff;font-size:var(--fs-base);letter-spacing:-.01em;cursor:pointer;transition:transform .15s var(--ease), box-shadow .15s var(--ease), filter .15s var(--ease), border-color .15s var(--ease), background-color .15s var(--ease);border:1px solid #0000;justify-content:center;align-items:center;gap:.4rem;padding:.68rem 1.45rem;font-family:inherit;font-weight:700;text-decoration:none;display:inline-flex;box-shadow:0 2px 8px #3d55e059,inset 0 1px #ffffff2e}.btn:hover{filter:brightness(1.06);text-decoration:none;transform:translateY(-1.5px);box-shadow:0 6px 16px #3d55e06b,inset 0 1px #ffffff2e}.btn:active{filter:brightness(.97);transform:translateY(.5px)scale(.99)}.btn.btn-lg{font-size:var(--fs-lg);border-radius:12px;padding:.9rem 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0;display:flex}.badge.badge-brand{background:var(--c-brand-soft);color:var(--c-brand-strong)}.badge.badge-accent{background:var(--c-accent-soft);color:var(--c-accent)}.badge.badge-line{border-color:var(--c-border-strong);background:0 0}.hero{text-align:center;isolation:isolate;padding:4.2rem 0 3rem;position:relative;overflow:clip}.hero:before,.hero:after{content:"";z-index:-1;pointer-events:none;border-radius:50%;position:absolute}.hero:before{background:var(--glow-brand);width:42rem;height:26rem;top:-8rem;left:50%;transform:translate(-72%)}.hero:after{background:var(--glow-accent);width:34rem;height:22rem;top:-4rem;left:50%;transform:translate(6%)}@media (width<=48rem){.hero:before,.hero:after{width:min(32rem,120vw);height:min(20rem,75vw)}}.hero h1{font-size:var(--fs-3xl);letter-spacing:-.035em;margin-bottom:.5em}.hero h1 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span.btn{background:var(--c-brand-soft);color:var(--c-brand-strong);cursor:default}.lead{font-size:var(--fs-lg);color:var(--c-text-sub);line-height:1.75}.section-head{justify-content:space-between;align-items:baseline;gap:1rem;margin:3rem 0 1.1rem;display:flex}.section-head h2{margin:0}.section-head a{font-size:var(--fs-sm);white-space:nowrap;font-weight:700}.icon-chip{background:var(--c-brand-soft);width:2.5rem;height:2.5rem;color:var(--c-brand-strong);box-shadow:inset 0 1px 0 #ffffff40, var(--shadow-2xs);border-radius:12px;justify-content:center;align-items:center;margin-bottom:.7rem;font-size:1.2rem;display:inline-flex}.icon-chip.chip-accent{background:var(--c-accent-soft);color:var(--c-accent)}.word-table-wrap{border:1px solid var(--c-border);border-radius:var(--radius);background:var(--c-surface);box-shadow:var(--shadow-sm);overflow-x:auto}table.word-table{border-collapse:collapse;table-layout:fixed;width:100%;font-size:var(--fs-sm)}.word-table .col-check{width:2.4rem}.word-table 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th[data-sort][aria-sort=ascending] .th-label:after{content:"↑";color:var(--c-brand-strong)}.word-table th[data-sort][aria-sort=descending]{color:var(--c-brand-strong);background:var(--c-brand-soft)}.word-table th[data-sort][aria-sort=descending] .th-label:after{content:"↓";color:var(--c-brand-strong)}.word-table-wrap{position:relative}.word-table thead th{box-shadow:0 1px 0 var(--c-border), var(--shadow-2xs)}.word-table tbody tr{transition:background .12s var(--ease)}.word-table tbody tr:hover{background:color-mix(in srgb, var(--c-brand-soft) 38%, transparent)}.word-table tbody tr:last-child td{border-bottom:none}.word-table .hw{font-weight:750;font-size:var(--fs-base);letter-spacing:-.01em}.word-table .ipa{color:var(--c-text-faint);font-size:var(--fs-xs);white-space:nowrap}.tts-btn{cursor:pointer;font-size:var(--fs-xs);color:var(--c-brand);vertical-align:middle;transition:background .15s var(--ease);background:0 0;border:none;border-radius:6px;padding:.1rem 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var(--c-border);border-radius:var(--radius-sm);background:var(--c-surface);color:var(--c-text);font-size:var(--fs-base);cursor:pointer;box-shadow:var(--shadow-sm);transition:border-color .15s var(--ease), transform .15s var(--ease), box-shadow .15s var(--ease), background .15s var(--ease);padding:.9rem 1.15rem;font-family:inherit;font-weight:550;position:relative}.quiz-choice:hover:not(:disabled){border-color:var(--c-brand);box-shadow:var(--shadow);transform:translateY(-1.5px)}.quiz-choice:active:not(:disabled){transform:scale(.99)}.quiz-choice.correct{border-color:var(--c-accent);background:var(--c-accent-soft);animation:pop-correct .35s var(--ease);font-weight:750}.quiz-choice.wrong{border-color:var(--c-wrong);background:var(--c-wrong-soft);animation:shake-wrong .4s var(--ease)}@keyframes pop-correct{0%{transform:scale(1)}45%{transform:scale(1.025)}to{transform:scale(1)}}@keyframes shake-wrong{0%,to{transform:translate(0)}25%{transform:translate(-5px)}55%{transform:translate(4px)}80%{transform:translate(-2px)}}.quiz-explanation{white-space:pre-line;background:var(--c-surface-2);border-radius:var(--radius-sm);font-size:var(--fs-sm);color:var(--c-text-sub);animation:rise-in .3s var(--ease);padding:.95rem 1.15rem}.quiz-input{width:100%;font-size:var(--fs-lg);border:1.5px solid var(--c-border);border-radius:var(--radius-sm);background:var(--c-surface);color:var(--c-text);transition:border-color .15s var(--ease), box-shadow .15s var(--ease);padding:.85rem 1.05rem;font-family:inherit}.quiz-input:hover:not(:focus):not(:disabled){border-color:var(--c-border-strong)}.quiz-input:focus{border-color:var(--c-brand);box-shadow:0 0 0 var(--ring-w) color-mix(in srgb, var(--c-brand) 18%, transparent);outline:none}.key-hint{font-size:var(--fs-xs);color:var(--c-text-faint);text-align:center;margin-top:.6rem}.key-hint kbd{min-width:1.4em;color:var(--c-text-sub);background:var(--c-surface-2);border:1px solid var(--c-border-strong);box-shadow:var(--shadow-2xs);border-bottom-width:2px;border-radius:5px;margin:0 .05em;padding:.08em .42em;font-family:inherit;font-size:.92em;font-weight:700;display:inline-block}@keyframes rise-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.flash-card{border:1px solid var(--c-border);border-radius:var(--radius-lg);background:linear-gradient(180deg, var(--c-surface), color-mix(in srgb, var(--c-brand-soft) 22%, var(--c-surface)));box-shadow:var(--shadow);text-align:center;cursor:pointer;min-height:17rem;transition:transform .2s var(--ease), box-shadow .2s var(--ease);animation:rise-in .35s var(--ease);flex-direction:column;justify-content:center;gap:.55rem;padding:2.2rem 1.6rem;display:flex}.flash-card:hover{box-shadow:var(--shadow-lift);transform:translateY(-2px)}.flash-card .hw{font-size:var(--fs-3xl);letter-spacing:-.02em;font-weight:800}.flash-card .meaning{font-size:var(--fs-xl);color:var(--c-brand-strong);animation:rise-in .3s var(--ease);font-weight:750}.flash-card .colloc,.flash-card .example,.flash-card .examnote{text-align:left;width:100%}.flash-card .colloc{color:var(--c-accent);background:var(--c-accent-soft);font-weight:650;font-size:var(--fs-sm);border-radius:var(--radius-sm,.5rem);padding:.5rem .7rem}.flash-card .example{color:var(--c-text-sub);font-size:var(--fs-sm)}.flash-card .examnote{color:var(--c-warn);background:var(--c-warn-soft);font-size:var(--fs-sm);border-radius:var(--radius-sm,.5rem);padding:.5rem .7rem}.stat-row{grid-template-columns:repeat(auto-fit,minmax(8.5rem,1fr));gap:.8rem;display:grid}.stat-tile{background:var(--c-surface);border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:1.05rem 1.25rem}.stat-tile .num{font-size:var(--fs-2xl);letter-spacing:-.02em;background:var(--grad-text);color:#0000;background-clip:text;font-weight:800}.stat-tile .label{font-size:var(--fs-xs);color:var(--c-text-sub);font-weight:600}.encouragement-msg{background:var(--c-brand-soft);border:1px solid var(--c-border);border-radius:var(--radius-sm);color:var(--c-brand-strong);margin:1rem 0 .3rem;padding:.9rem 1.2rem;font-weight:650}.heatmap{grid-template-rows:repeat(7,13px);grid-auto-flow:column;gap:3.5px;padding-bottom:.5rem;display:grid;overflow-x:auto}.heatmap .cell{background:var(--c-surface-2);border-radius:3.5px;width:13px;height:13px}.heatmap .cell[data-level="1"]{background:color-mix(in srgb, var(--c-accent) 35%, var(--c-surface-2))}.heatmap .cell[data-level="2"]{background:color-mix(in srgb, var(--c-accent) 65%, var(--c-surface-2))}.heatmap .cell[data-level="3"]{background:var(--c-accent)}.planner-result{background:linear-gradient(180deg, var(--c-surface-2), color-mix(in srgb, var(--c-brand-soft) 35%, var(--c-surface-2)));border:1px solid var(--c-border);border-radius:var(--radius);animation:rise-in .3s var(--ease);margin-top:1.2rem;padding:1.5rem}.field{margin-bottom:1.1rem}.field label{font-weight:700;font-size:var(--fs-sm);margin-bottom:.35rem;display:block}.field .hint{font-size:var(--fs-xs);color:var(--c-text-faint);margin-top:.3rem}.field input,.field select,.field textarea{width:100%;font-size:var(--fs-base);border:1.5px solid var(--c-border);border-radius:var(--radius-sm);background:var(--c-surface);color:var(--c-text);box-shadow:var(--shadow-2xs);transition:border-color .15s var(--ease), box-shadow .15s var(--ease);padding:.68rem .95rem;font-family:inherit}.field input:hover:not(:focus):not(:disabled),.field select:hover:not(:focus):not(:disabled),.field textarea:hover:not(:focus):not(:disabled){border-color:var(--c-border-strong)}.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--c-brand);box-shadow:0 0 0 var(--ring-w) color-mix(in srgb, 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1.15rem}.tip-box.tip-accent{border-color:color-mix(in srgb, var(--c-accent) 25%, var(--c-border));border-left-color:var(--c-accent);background:color-mix(in srgb, var(--c-accent-soft) 55%, var(--c-surface))}.article-meta{font-size:var(--fs-xs);color:var(--c-text-faint);margin-bottom:1.6rem}.article-cta{background:linear-gradient(180deg, var(--c-surface-2), color-mix(in srgb, var(--c-brand-soft) 30%, var(--c-surface-2)));border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--shadow-sm);margin-top:2.6rem;padding:1.4rem 1.6rem}.data-table{border-collapse:collapse;width:100%;font-size:var(--fs-sm);background:var(--c-surface);border-radius:var(--radius-sm);box-shadow:var(--shadow-sm);margin:1.1rem 0;overflow:hidden}.data-table th,.data-table td{border:1px solid var(--c-border);text-align:left;padding:.6rem .85rem}.data-table thead th{background:var(--c-surface-2);font-weight:750}.formula{background:linear-gradient(135deg, var(--c-brand-soft), color-mix(in srgb, var(--c-brand-soft) 45%, var(--c-surface)));border:1px solid color-mix(in srgb, var(--c-brand) 18%, var(--c-border));color:var(--c-brand-deep);border-radius:var(--radius-sm);letter-spacing:-.01em;text-align:center;margin:1.1rem 0;padding:1rem 1.2rem;font-weight:800}.text-sub{color:var(--c-text-sub)}.text-center{text-align:center}.mt-0{margin-top:0}.grid-2{grid-template-columns:repeat(auto-fit,minmax(16rem,1fr));gap:1rem;display:grid}.grid-3{grid-template-columns:repeat(auto-fit,minmax(13rem,1fr));gap:1rem;display:grid}@media print{.site-header,.site-footer,.no-print,.quiz-box,.btn,.breadcrumb,.day-nav{display:none!important}body{color:#000;background:#fff;font-size:10.5pt}.word-table-wrap{box-shadow:none;border:none;overflow:visible}.word-table th,.word-table td{border-bottom:.5pt solid #999;padding:.35rem .5rem}.word-table thead th{position:static}a{color:#000}.print-footer{color:#666;text-align:center;margin-top:1rem;font-size:8pt;display:block!important}}.print-footer{display:none}.article-sources ol{padding-left:1.2rem}.article-sources li{font-size:var(--fs-sm);margin-bottom:.7rem;line-height:1.6}.article-sources li a{word-break:break-word}.astro-route-announcer{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;top:0;left:0;overflow:hidden}