:root{--bg-deep:#0c1412;--bg-card:#152320;--bg-elevated:#1c2e2a;--ink:#e8e6e1;--ink-muted:#9aafaa;--accent:#d4a574;--accent-dim:#9a7350;--ok:#6bc9a8;--bad:#e07a7a;--border:#d4a57438;--font-display:"Fraunces", Georgia, serif;--font-body:"Source Sans 3", system-ui, sans-serif;--radius:14px;--shadow:0 24px 48px #00000059}*,:before,:after{box-sizing:border-box}html{-webkit-font-smoothing:antialiased;font-size:17px}body{min-height:100vh;font-family:var(--font-body);background:var(--bg-deep);color:var(--ink);background-image:radial-gradient(120% 80% at 10% -20%,#d4a5741f,#0000 50%),radial-gradient(80% 60% at 100% 0,#6bc9a80f,#0000 45%);margin:0}#root{min-height:100vh}.el-app{flex-direction:column;min-height:100vh;display:flex}.el-header{z-index:20;border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#0c1412e0;position:sticky;top:0}.el-header__inner{max-width:1100px;padding-top:max(.85rem, env(safe-area-inset-top,0px));padding-bottom:.85rem;padding-left:max(1.25rem, env(safe-area-inset-left,0px));padding-right:max(1.25rem, env(safe-area-inset-right,0px));z-index:2;flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:1rem;margin:0 auto;display:flex;position:relative}.el-logo{color:var(--ink);font-family:var(--font-display);letter-spacing:-.02em;align-items:center;gap:.45rem;font-size:1.35rem;font-weight:700;text-decoration:none;display:flex}.el-logo__mark{color:var(--accent);font-size:1.1rem}.el-nav__toggle{border:1px solid var(--border);width:2.75rem;height:2.75rem;color:var(--ink);cursor:pointer;background:#ffffff0f;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;margin:0;padding:0;transition:background .15s,border-color .15s;display:none}.el-nav__toggle:hover{border-color:var(--accent);background:#ffffff1a}.el-nav__toggle:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.el-nav__toggle-box{flex-direction:column;justify-content:center;gap:5px;width:1.15rem;display:flex}.el-nav__toggle-bar{background:currentColor;border-radius:1px;height:2px;display:block}.el-nav__backdrop{display:none}.el-nav{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:.35rem .75rem;display:flex}@media (width<=768px){.el-header__inner{flex-wrap:wrap}.el-nav__toggle{display:inline-flex}.el-nav{border-top:1px solid var(--border);flex-direction:column;flex-basis:100%;order:3;justify-content:flex-start;align-items:stretch;gap:.35rem;margin-top:.35rem;padding-top:.65rem;display:none}.el-nav--open{display:flex}.el-nav__link{text-align:center;padding:.55rem .85rem}.el-nav__backdrop{z-index:1;cursor:pointer;background:#00000073;border:none;margin:0;padding:0;display:block;position:fixed;inset:0}}@media (width>=769px){.el-nav{display:flex!important}}.el-nav__link{color:var(--ink-muted);border-radius:999px;padding:.4rem .75rem;font-size:.92rem;font-weight:600;text-decoration:none;transition:color .15s,background .15s}.el-nav__link:hover{color:var(--ink);background:#ffffff0d}.el-nav__link--active{color:var(--bg-deep);background:var(--accent)}.el-main{width:100%;max-width:1100px;padding:2rem max(1.25rem, env(safe-area-inset-left,0px)) 3rem max(1.25rem, env(safe-area-inset-right,0px));flex:1;margin:0 auto}.el-footer{border-top:1px solid var(--border);padding:1rem max(1.25rem, env(safe-area-inset-left,0px)) max(1.5rem, calc(1rem + env(safe-area-inset-bottom,0px))) max(1.25rem, env(safe-area-inset-right,0px));text-align:center;color:var(--ink-muted);font-size:.82rem}.el-footer code{color:var(--accent-dim);font-size:.85em}.el-page{animation:.45s ease-out el-in}@keyframes el-in{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.el-page-head h1{font-family:var(--font-display);letter-spacing:-.02em;margin:0 0 .35rem;font-size:clamp(1.75rem,4vw,2.25rem);font-weight:700}.el-muted{color:var(--ink-muted);margin:0}.el-error{color:var(--bad)}.el-home{flex-direction:column;gap:3rem;display:flex}.el-hero__eyebrow{text-transform:uppercase;letter-spacing:.2em;color:var(--accent);margin:0 0 .75rem;font-size:.72rem;font-weight:700}.el-hero__title{font-family:var(--font-display);letter-spacing:-.03em;margin:0 0 1rem;font-size:clamp(2.1rem,5.5vw,3.1rem);font-weight:700;line-height:1.15}.el-hero__accent{color:var(--accent);font-style:italic}.el-hero__lead{max-width:36rem;color:var(--ink-muted);margin:0 0 1.5rem;line-height:1.65}.el-hero__stats{flex-wrap:wrap;gap:2rem;display:flex}.el-stat{flex-direction:column;gap:.15rem;display:flex}.el-stat__num{font-family:var(--font-display);color:var(--accent);font-size:2.25rem;font-weight:700}.el-stat__label{color:var(--ink-muted);font-size:.85rem}.el-cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1.25rem;display:grid}.el-feature{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);color:inherit;box-shadow:var(--shadow);padding:1.5rem 1.35rem;text-decoration:none;transition:transform .2s,border-color .2s;display:block}.el-feature:hover{border-color:#d4a57473;transform:translateY(-3px)}.el-feature__icon{color:var(--accent);opacity:.9;margin-bottom:.75rem;font-size:1.5rem;display:block}.el-feature h2{font-family:var(--font-display);margin:0 0 .5rem;font-size:1.25rem}.el-feature p{color:var(--ink-muted);margin:0;font-size:.92rem;line-height:1.55}.el-btn{font-family:var(--font-body);cursor:pointer;background:var(--accent);color:var(--bg-deep);border:none;border-radius:999px;padding:.55rem 1.1rem;font-size:.92rem;font-weight:600;transition:filter .15s,opacity .15s}.el-btn:hover:not(:disabled){filter:brightness(1.08)}.el-btn:disabled{opacity:.45;cursor:not-allowed}.el-btn--ghost{color:var(--ink);border:1px solid var(--border);background:0 0}.el-btn--ghost:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.el-btn--active{color:var(--ok);background:#6bc9a840;border:1px solid #6bc9a873}.el-btn--xs{padding:.28rem .65rem;font-size:.78rem}.el-btn--sm{padding:.38rem .75rem;font-size:.82rem}.el-speak{border:1px solid var(--border);width:2.55rem;height:2.55rem;color:var(--accent);cursor:pointer;background:#d4a57424;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;padding:0;transition:background .15s,border-color .15s,transform .12s;display:inline-flex}.el-speak:hover{border-color:var(--accent);background:#d4a57447;transform:scale(1.05)}.el-speak:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.el-speak--sm{width:2rem;height:2rem}.el-speak__svg{width:1.15rem;height:1.15rem}.el-speak--sm .el-speak__svg{width:.95rem;height:.95rem}.el-badge{text-transform:uppercase;letter-spacing:.06em;color:var(--accent);background:#d4a57433;border-radius:6px;padding:.2rem .5rem;font-size:.72rem;font-weight:700;display:inline-block}.el-badge--ghost{color:var(--ink-muted);background:#ffffff0f}.el-badge--sm{font-size:.65rem}.el-flash{max-width:520px;margin:0 auto}.el-flip-wrap{touch-action:none;-webkit-user-select:none;user-select:none;margin:1.5rem 0;position:relative;overflow:visible}.el-flip-wrap--flying{overflow:hidden}.el-flip__pan{will-change:transform;transform-origin:50% 80%;width:100%;position:relative;transform:translate(0,0)}.el-flip__pan--snap{transition:transform .5s cubic-bezier(.34,1.56,.52,1)!important}.el-flip__pan--fly{transition:transform .36s cubic-bezier(.16,1,.3,1)!important}.el-flip-swipe-ink{border-radius:var(--radius);pointer-events:none;z-index:2;opacity:0;will-change:opacity;position:absolute;inset:0}.el-flip-swipe-ink--left{background:linear-gradient(90deg,#e07a7a6b 0%,#e07a7a1f 45%,#0000 72%)}.el-flip-swipe-ink--right{background:linear-gradient(270deg,#6bc9a866 0%,#6bc9a81f 45%,#0000 72%)}.el-flip-wrap .el-flip{z-index:1;position:relative}.el-flip-swipe-hint{color:var(--ink-muted);pointer-events:none;justify-content:space-between;align-items:center;gap:.75rem;margin-bottom:.5rem;padding:0 .15rem;font-size:.78rem;font-weight:600;display:flex}.el-flip-swipe-hint span{align-items:center;gap:.25rem;display:inline-flex}.el-flip-swipe-hint__left{color:var(--bad);opacity:.85}.el-flip-swipe-hint__right{color:var(--ok);opacity:.85}.el-flip{perspective:1200px;cursor:pointer;background:0 0;border:none;width:100%;min-height:280px;margin:0;padding:0;display:block}.el-flip:focus-visible{outline:2px solid var(--accent);outline-offset:4px;border-radius:var(--radius)}.el-flip__inner{width:100%;min-height:280px;transform-style:preserve-3d;transition:transform .65s cubic-bezier(.4,0,.2,1);position:relative}.el-flip--back .el-flip__inner{transform:rotateY(180deg)}.el-flip__face{backface-visibility:hidden;border-radius:var(--radius);border:1px solid var(--border);background:var(--bg-card);box-shadow:var(--shadow);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:2rem 1.5rem;display:flex;position:absolute;inset:0}.el-flip__back{transform:rotateY(180deg)}.el-flip__word-row{flex-wrap:wrap;justify-content:center;align-items:center;gap:.65rem;margin-top:.75rem;display:flex}.el-flip__word{font-family:var(--font-display);margin:0;font-size:clamp(1.85rem,5vw,2.5rem);font-weight:700}.el-flip__speak-row{flex-wrap:wrap;justify-content:center;gap:.5rem;margin-top:1rem;display:flex}.el-flip__hint{color:var(--ink-muted);margin-top:1.25rem;font-size:.85rem}.el-flip__meaning-btn{text-align:center;max-width:100%;color:var(--ink);border:1px dashed var(--border);cursor:pointer;background:#ffffff0d;border-radius:10px;margin:.75rem 0 0;padding:.45rem .85rem;font-family:inherit;font-size:1.15rem;font-weight:600;line-height:1.5;transition:border-color .15s,background .15s}.el-flip__meaning-btn:hover{border-color:var(--accent);background:#d4a5741f}.el-flip__meaning-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.el-flip__hint--back{margin-top:.4rem;font-size:.8rem;display:block}.el-warn{color:var(--bad);font-weight:500}.el-warn--block{max-width:26rem;margin:.5rem auto 0;font-size:.78rem;line-height:1.45}.el-flip__ex{color:var(--ink-muted);border:none;margin:1rem 0 0;padding:0;font-size:.95rem;font-style:italic;line-height:1.5}.el-flash__actions{flex-wrap:wrap;justify-content:center;gap:.6rem;display:flex}.el-quiz__card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);max-width:480px;box-shadow:var(--shadow);margin:0 auto;padding:1.75rem 1.5rem}.el-quiz__label{color:var(--ink-muted);margin:0;font-size:.88rem}.el-quiz__word-row{flex-wrap:wrap;align-items:center;gap:.6rem;margin:.5rem 0 .75rem;display:flex}.el-quiz__word{font-family:var(--font-display);margin:0;font-size:2rem;font-weight:700}.el-quiz__opts{flex-direction:column;gap:.6rem;margin:1.25rem 0 0;padding:0;list-style:none;display:flex}.el-quiz__opt{text-align:left;border:1px solid var(--border);background:var(--bg-elevated);width:100%;color:var(--ink);font-family:var(--font-body);cursor:pointer;border-radius:10px;padding:.85rem 1rem;font-size:.95rem;transition:border-color .15s,background .15s}.el-quiz__opt:hover:not(:disabled){border-color:var(--accent)}.el-quiz__opt:disabled{cursor:default}.el-quiz__opt--ok{border-color:var(--ok);background:#6bc9a81f}.el-quiz__opt--bad{border-color:var(--bad);background:#e07a7a1a}.el-quiz__fb{margin:1rem 0 0;font-weight:600}.el-quiz__fb--ok{color:var(--ok)}.el-quiz__fb--bad{color:var(--bad)}.el-quiz__bar{flex-wrap:wrap;gap:.65rem;margin-top:1.35rem;display:flex}.el-quiz-parts--feature{margin-top:.5rem}.el-quiz-parts{grid-template-columns:repeat(auto-fill,minmax(5.5rem,1fr));gap:.5rem;margin:.75rem 0 0;padding:0;list-style:none;display:grid}.el-quiz-part--full{border-color:var(--accent);background:#6bc9a814;grid-column:1/-1;min-height:3rem;font-size:1rem}.el-quiz-part{border:1px solid var(--border);background:var(--bg-elevated);min-height:2.5rem;color:var(--ink);border-radius:10px;justify-content:center;align-items:center;padding:.5rem .65rem;font-size:.9rem;font-weight:600;text-decoration:none;transition:border-color .15s,background .15s;display:flex}.el-quiz-part:hover{border-color:var(--accent);background:var(--bg-card)}.el-dict__filters{grid-template-columns:1fr minmax(160px,220px);gap:1rem;margin-bottom:1.25rem;display:grid}@media (width<=600px){.el-dict__filters{grid-template-columns:1fr}}.el-field{flex-direction:column;gap:.35rem;display:flex}.el-field__label{text-transform:uppercase;letter-spacing:.08em;color:var(--ink-muted);font-size:.78rem;font-weight:700}.el-input{font-family:var(--font-body);border:1px solid var(--border);background:var(--bg-elevated);color:var(--ink);border-radius:10px;padding:.65rem .85rem;font-size:1rem}.el-input:focus{outline:2px solid var(--accent);outline-offset:1px}.el-table-wrap{border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-card);overflow-x:auto}.el-table{border-collapse:collapse;width:100%;font-size:.88rem}.el-table th,.el-table td{text-align:left;border-bottom:1px solid var(--border);vertical-align:top;padding:.65rem .85rem}.el-table th{text-transform:uppercase;letter-spacing:.06em;color:var(--ink-muted);background:var(--bg-elevated);font-size:.72rem}.el-table__word{color:var(--accent);white-space:nowrap;font-weight:700}.el-table__word-inner{align-items:center;gap:.25rem;display:inline-flex}.el-table__th-speak{min-width:7rem}.el-table__ex{color:var(--ink-muted);max-width:280px}.el-pager{justify-content:center;align-items:center;gap:1rem;margin-top:1.25rem;display:flex}.el-speakpr__banner{border-radius:var(--radius);background:#e07a7a14;border:1px solid #e07a7a73;margin-bottom:1.25rem;padding:.85rem 1rem}.el-speakpr__panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);max-width:520px;box-shadow:var(--shadow);margin:0 auto;padding:1.5rem 1.25rem}.el-speakpr__modes{flex-wrap:wrap;align-items:center;gap:.5rem;margin-bottom:1rem;display:flex}.el-speakpr__hint-toggle{color:var(--ink-muted);cursor:pointer;align-items:center;gap:.5rem;margin-bottom:1.25rem;font-size:.9rem;display:flex}.el-speakpr__hint-toggle input{accent-color:var(--accent)}.el-speakpr__target{text-align:center;margin-bottom:1.5rem}.el-speakpr__prompt{color:var(--ink-muted);margin:.75rem 0 .35rem;font-size:.88rem}.el-speakpr__english{font-family:var(--font-display);margin:0;font-size:clamp(1.35rem,4vw,1.85rem);font-weight:700;line-height:1.35}.el-speakpr__vi{color:var(--accent-dim);margin:.85rem 0 0;font-size:.95rem}.el-speakpr__actions{flex-wrap:wrap;justify-content:center;align-items:center;gap:.75rem;margin-bottom:1rem;display:flex}.el-speakpr__mic{border:2px solid var(--border);color:var(--accent);font-family:var(--font-body);cursor:pointer;background:#d4a57426;border-radius:999px;align-items:center;gap:.55rem;padding:.65rem 1.2rem;font-size:.95rem;font-weight:700;transition:border-color .2s,background .2s,box-shadow .2s;display:inline-flex}.el-speakpr__mic:hover:not(:disabled){border-color:var(--accent);background:#d4a57447}.el-speakpr__mic:disabled{opacity:.55;cursor:not-allowed}.el-speakpr__mic--on{border-color:var(--ok);color:var(--ok);background:#6bc9a82e;animation:1.2s ease-in-out infinite el-mic-pulse}@keyframes el-mic-pulse{0%,to{box-shadow:0 0 #6bc9a859}50%{box-shadow:0 0 0 10px #6bc9a800}}.el-speakpr__mic-icon{width:1.35rem;height:1.35rem}.el-speakpr__msg{margin:0 0 .75rem;font-size:.88rem}.el-speakpr__result{background:var(--bg-elevated);border:1px solid var(--border);border-radius:10px;margin-bottom:1.25rem;padding:1rem}.el-speakpr__transcript{margin:.35rem 0 0;font-size:1.05rem;font-style:italic}.el-speakpr__verdict{margin:.75rem 0 0;font-weight:700}.el-speakpr__verdict--ok{color:var(--ok)}.el-speakpr__verdict--bad{color:var(--bad)}.el-speakpr__bar{flex-wrap:wrap;justify-content:center;gap:.65rem;display:flex}
