@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/lexend-vietnamese-400-normal-DoLa7jNB.woff2) format("woff2"),url(/assets/lexend-vietnamese-400-normal-mPlHoWg5.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/lexend-latin-ext-400-normal-D38JI5AK.woff2) format("woff2"),url(/assets/lexend-latin-ext-400-normal-D9P7pMo-.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/lexend-latin-400-normal-CwRJVcUA.woff2) format("woff2"),url(/assets/lexend-latin-400-normal-CHypAkT3.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/lexend-vietnamese-500-normal-Bos7Oy9U.woff2) format("woff2"),url(/assets/lexend-vietnamese-500-normal-EFAPmUTE.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/lexend-latin-ext-500-normal-Bo17xs96.woff2) format("woff2"),url(/assets/lexend-latin-ext-500-normal-DbCmXT_D.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/lexend-latin-500-normal-Dl-X5nog.woff2) format("woff2"),url(/assets/lexend-latin-500-normal-D9x1QWTH.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/lexend-vietnamese-600-normal-Cr1ePs6O.woff2) format("woff2"),url(/assets/lexend-vietnamese-600-normal-BxEVPgxw.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/lexend-latin-ext-600-normal-hDcqLAH9.woff2) format("woff2"),url(/assets/lexend-latin-ext-600-normal-BXtyp5LP.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/lexend-latin-600-normal-DdvlkEkX.woff2) format("woff2"),url(/assets/lexend-latin-600-normal-DSBzZxpA.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/lexend-vietnamese-700-normal-BrGlFDtO.woff2) format("woff2"),url(/assets/lexend-vietnamese-700-normal-NEp7hM5T.woff) format("woff");unicode-range:U+0102-0103,U+0110-0111,U+0128-0129,U+0168-0169,U+01A0-01A1,U+01AF-01B0,U+0300-0301,U+0303-0304,U+0308-0309,U+0323,U+0329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/lexend-latin-ext-700-normal-CcWyeg4T.woff2) format("woff2"),url(/assets/lexend-latin-ext-700-normal-iR1cPiNX.woff) format("woff");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/lexend-latin-700-normal-DqO8md6r.woff2) format("woff2"),url(/assets/lexend-latin-700-normal-DVyJlN8t.woff) format("woff");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--book-backdrop: #2a241d;--book-card: #f4ecdc;--book-card-strong: #f0e6d3;--book-ink: #2f291f;--book-muted: #776c5e;--book-primary: #8b4b34;--book-primary-strong: #6f3724;--book-accent: #6a8f57;--book-border: rgba(116, 93, 66, .35);--book-spine: #6c402f;--book-shadow: rgba(0, 0, 0, .45);--book-page-shadow: rgba(0, 0, 0, .08);--book-highlight: rgba(255, 214, 84, .52);--book-success: #4d8a63;--book-error: #b24c3b;--venturead-book-ui-desk-bg: url(/book-ui/desk-bg.jpg);--venturead-book-ui-page-texture: url(/book-ui/page-texture.jpg)}html,body{min-height:100%}body{margin:0;background:linear-gradient(#14100b57,#14100b57),var(--venturead-book-ui-desk-bg) center / cover fixed no-repeat;color:var(--book-ink);font-family:Lexend,sans-serif}button,input,textarea,select{font:inherit}.book-paper-grain{position:relative}.book-paper-grain:before{content:"";position:absolute;inset:0;pointer-events:none;opacity:.035;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E")}.book-page-corner:after{content:"";position:absolute;right:0;bottom:0;width:42px;height:42px;pointer-events:none;background:linear-gradient(135deg,transparent 48%,rgba(0,0,0,.035) 52%,rgba(0,0,0,.08) 100%);border-top-left-radius:4px}.book-scroll::-webkit-scrollbar{width:7px}.book-scroll::-webkit-scrollbar-track{background:transparent}.book-scroll::-webkit-scrollbar-thumb{background:#745d4266;border-radius:999px}.book-scroll::-webkit-scrollbar-thumb:hover{background:#745d429e}@keyframes book-flip-forward{0%{transform:rotateY(0);box-shadow:-2px 0 8px #00000014}30%{box-shadow:-10px 0 24px #0000002e}50%{transform:rotateY(-90deg);box-shadow:0 0 36px #0000003d}70%{box-shadow:10px 0 24px #0000002e}to{transform:rotateY(-180deg);box-shadow:2px 0 8px #00000014}}@keyframes book-flip-backward{0%{transform:rotateY(0);box-shadow:2px 0 8px #00000014}30%{box-shadow:10px 0 24px #0000002e}50%{transform:rotateY(90deg);box-shadow:0 0 36px #0000003d}70%{box-shadow:-10px 0 24px #0000002e}to{transform:rotateY(180deg);box-shadow:-2px 0 8px #00000014}}.lesson-player{box-sizing:border-box;min-height:100vh;max-width:96rem;margin:0 auto;padding:.75rem 1rem 1rem;display:grid;gap:.75rem;align-content:start}.lesson-stage{display:grid;gap:1rem}.lesson-stage.has-sidebar{grid-template-columns:minmax(0,1fr) minmax(22rem,24rem);align-items:start}.lesson-stage__main{min-width:0;display:grid;justify-items:center}.lesson-stage__sidebar{min-width:0;position:sticky;top:.75rem;align-self:start}.top-bar{display:grid;grid-template-columns:min-content 1fr min-content;align-items:center;gap:.75rem}.top-bar-center{display:flex;align-items:center;justify-content:center;gap:.5rem;flex-wrap:wrap}.top-bar-nav{display:flex;align-items:center}.top-bar-nav--left{justify-self:start}.top-bar-nav--right{justify-self:end}.lesson-meta{display:flex;align-items:center;gap:.45rem;color:#fff7eb;text-shadow:0 2px 10px rgba(0,0,0,.24)}.lesson-label{padding:.25rem .55rem;border-radius:999px;background:#fff7eb24;font:700 .74rem/1 Lexend,sans-serif;letter-spacing:.08em;text-transform:uppercase}.lesson-title{font:600 .95rem/1.2 Lexend,sans-serif}.controls{display:flex;align-items:center;gap:.55rem;flex-wrap:wrap;justify-content:center}.controls button,.advanced-controls summary{border:none;border-radius:999px;padding:.48rem .95rem;background:#fffaf0eb;color:var(--book-ink);font:600 .88rem/1 Lexend,sans-serif;box-shadow:0 10px 20px #0000001f;cursor:pointer}.controls button:hover,.advanced-controls summary:hover{background:#fff}.seek-range{--seek-progress: 0%;--seek-track-fill: rgba(196, 109, 59, .95);--seek-track-rest: rgba(116, 93, 66, .18);appearance:none;display:block;width:min(16rem,42vw);height:.45rem;margin:0;padding:0;border-radius:999px;background:linear-gradient(90deg,var(--seek-track-fill) 0%,var(--seek-track-fill) var(--seek-progress),var(--seek-track-rest) var(--seek-progress),var(--seek-track-rest) 100%);outline:none;box-sizing:border-box}.seek-range::-webkit-slider-runnable-track{height:.45rem;border-radius:999px;background:transparent}.seek-range::-moz-range-track{height:.45rem;border-radius:999px;background:transparent}.seek-range::-webkit-slider-thumb{appearance:none;width:1rem;height:1rem;margin-top:-.275rem;border:2px solid rgba(111,55,36,.22);border-radius:999px;background:#fff8ee;box-shadow:0 5px 10px #29191124}.seek-range::-moz-range-thumb{width:1rem;height:1rem;border:2px solid rgba(111,55,36,.22);border-radius:999px;background:#fff8ee;box-shadow:0 5px 10px #29191124}.seek-group{display:flex;align-items:center;gap:.45rem}.seek-shell{display:flex;align-items:center;padding:.45rem .6rem;border-radius:999px;background:#fff8ece6;box-shadow:0 10px 18px #29191124}.timeline-readout{flex:0 0 15ch;color:#7b5a48;font:600 .76rem/1 Lexend,sans-serif;font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}.advanced-controls{position:relative}.advanced-controls summary{list-style:none}.advanced-controls summary::-webkit-details-marker{display:none}.advanced-controls__panel{position:absolute;top:calc(100% + .45rem);right:0;min-width:12rem;display:grid;gap:.65rem;padding:.8rem;border-radius:1rem;background:#fffaf0fa;box-shadow:0 20px 30px #00000029;z-index:30}.advanced-controls__panel select,.advanced-controls__panel input{font:inherit}.buffer-input{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:.4rem;color:#6d5240;font:600 .8rem/1.2 Lexend,sans-serif}.story-reference-dock{pointer-events:auto;position:absolute;top:1.25rem;right:-.85rem;z-index:55}.story-reference-dock--return{top:1.25rem}.story-reference-tab{position:relative;width:14.5rem;min-height:4.6rem;display:grid;align-items:center;padding:.95rem 1.25rem 1.15rem;border:0;border-radius:1.25rem 1.25rem .8rem .8rem;box-shadow:0 18px 28px #27160c3d;text-align:center;cursor:pointer;transition:transform .15s ease,filter .15s ease}.story-reference-tab:after{content:"";position:absolute;left:0;right:0;bottom:-.7rem;margin:auto;width:0;height:0;border-left:1.3rem solid transparent;border-right:1.3rem solid transparent}.story-reference-tab:hover{transform:translateY(-1px);filter:brightness(1.02)}.story-reference-tab--story{background:linear-gradient(180deg,#ec8d3a,#db6b27);color:#fff7ea}.story-reference-tab--story:after{border-top:1rem solid #c95b20}.story-reference-tab--question{background:linear-gradient(180deg,#50a6c8,#2e80a0);color:#f3fbff}.story-reference-tab--question:after{border-top:1rem solid #1f6d8b}.story-reference-tab__label{display:block;font:700 1rem/1.2 Lexend,sans-serif;letter-spacing:.01em}.story-reference-preview{position:absolute;top:0;right:calc(100% + 1rem);width:min(29rem,46vw);padding:.95rem;border-radius:1.4rem;background:#f2e8d9fa;box-shadow:0 24px 40px #20130b47;pointer-events:none}.story-reference-preview__header{display:flex;align-items:center;justify-content:space-between;gap:.75rem;margin-bottom:.65rem}.story-reference-preview__title{color:#4a311c;font:700 .95rem/1.2 Lexend,sans-serif;text-transform:uppercase;letter-spacing:.06em}.story-reference-preview__viewport{border-radius:1rem;padding:.85rem;background:#fffcf8f5;overflow:hidden}.story-reference-preview__canvas{transform-origin:top right;transform:scale(.72);width:138%}@media(max-width:1100px){.lesson-stage.has-sidebar{grid-template-columns:1fr}.lesson-stage__sidebar{position:static}}@media(max-width:900px){.top-bar{grid-template-columns:1fr;justify-items:center}.top-bar-nav{width:100%;justify-content:space-between}.story-reference-preview{display:none}}.book-nav-button{pointer-events:auto;display:flex;align-items:center;justify-content:center;width:3.25rem;height:3.25rem;border:2px solid rgba(255,249,238,.22);border-radius:999px;background:#fdf9f1eb;color:var(--book-primary-strong);box-shadow:0 12px 28px #00000038;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);cursor:pointer;transition:transform .16s ease,box-shadow .16s ease,background .16s ease,opacity .16s ease}.book-nav-button span{font-size:1.9rem;line-height:1;transform:translateY(-1px)}.book-nav-button:hover:not(.is-disabled){transform:translateY(-1px);box-shadow:0 16px 34px #00000047;background:#fdf9f1}.book-nav-button.is-disabled{opacity:.32;cursor:not-allowed;box-shadow:none}.page-dots{display:flex;align-items:center;justify-content:center;gap:.5rem}.page-dots div{width:.55rem;height:.55rem;border-radius:999px;background:#faf4e873;transition:all .18s ease}.page-dots div.active{width:1.8rem;background:#faf4e8f5}.page-flip-overlay{position:absolute;inset:0;z-index:30;pointer-events:none;perspective:2000px}.page-flip-sheet{position:absolute;inset:0;transform-origin:left center;transform-style:preserve-3d;animation:book-flip-forward .7s ease-in-out forwards}.page-flip-sheet.backward{transform-origin:right center;animation-name:book-flip-backward}.page-flip-face{position:absolute;inset:0;backface-visibility:hidden;background:linear-gradient(to right,rgba(255,255,255,.22),transparent 26%),var(--venturead-book-ui-page-texture) center / cover no-repeat}.page-flip-face-front:after,.page-flip-face-back:after{content:"";position:absolute;inset:0}.page-flip-face-front:after{background:linear-gradient(to right,#f4ecdcfa 78%,#0000000d)}.page-flip-face-back{transform:rotateY(180deg)}.page-flip-face-back:after{background:linear-gradient(to left,#f4ecdcfa 78%,#00000014)}.page-flip-sheet.backward .page-flip-face{background:linear-gradient(to left,rgba(255,255,255,.22),transparent 26%),var(--venturead-book-ui-page-texture) center / cover no-repeat}.page-flip-sheet.backward .page-flip-face-front:after{background:linear-gradient(to left,#f4ecdcfa 78%,#0000000d)}.page-flip-sheet.backward .page-flip-face-back:after{background:linear-gradient(to right,#f4ecdcfa 78%,#00000014)}.book-stage{position:relative;display:grid;width:100%;max-width:82rem;justify-items:center;gap:1rem}.book-frame{position:relative;display:flex;flex-direction:column;justify-self:center;width:min(100%,50rem);height:53rem;transition:width .5s ease,max-width .5s ease}.book-frame.is-spread{width:min(100%,82rem)}.book-top-curve{pointer-events:none;position:absolute;top:-.2rem;left:1.25rem;right:0;z-index:20;height:.95rem;background:linear-gradient(to bottom,rgba(244,236,220,.9),transparent);border-radius:50% 50% 0 0/100% 100% 0 0;opacity:.62}.book-top-stack,.book-bottom-stack{position:absolute;z-index:10;height:.22rem;border-radius:999px;background:#f4ecdcad}.stack-1{top:-.16rem;left:1.5rem;right:.4rem}.stack-2{top:-.34rem;left:1.9rem;right:.75rem;opacity:.55}.stack-3{top:-.5rem;left:2.3rem;right:1.05rem;opacity:.35}.book-body{position:relative;display:flex;flex:1;overflow:hidden;border-radius:.2rem;box-shadow:0 26px 60px -14px var(--book-shadow),0 0 0 1px #0000001a,inset 0 1px #ffffff2e}.book-spine{position:absolute;inset-block:0;left:0;z-index:20;width:.9rem;background:var(--book-spine);box-shadow:inset -8px 0 14px #0000002e}.book-overlay-chrome{pointer-events:none;position:absolute;inset:0;z-index:45;overflow:visible}.ridge{position:absolute;inset-block:0;width:1px}.ridge-right{right:0;background:#ffffff1f}.ridge-left{left:0;background:#0000003d}.bookmark-ribbon{position:absolute;right:2.25rem;top:0;z-index:35;width:1.45rem;height:4.9rem;background:var(--book-primary);border-bottom-left-radius:.25rem;border-bottom-right-radius:.25rem;box-shadow:0 10px 22px #0000002e}.bookmark-notch{position:absolute;left:0;right:0;bottom:-.02rem;margin:auto;width:0;height:0;border-left:.72rem solid var(--book-primary);border-right:.72rem solid var(--book-primary);border-bottom:.62rem solid transparent}.book-page{position:relative;margin-left:.9rem;flex:1;overflow:hidden;background:linear-gradient(#fffaf0d6,#fffaf0d6),var(--venturead-book-ui-page-texture) center / cover no-repeat}.book-page.is-cover{background:none}.book-page-wash{position:absolute;inset:0;background:#f4ecdcbd}.book-page-inner-shadow{position:absolute;inset-block:0;left:0;width:3.5rem;z-index:10;background:linear-gradient(to right,rgba(0,0,0,.08),rgba(0,0,0,.03) 42%,transparent)}.book-page-lines{position:absolute;inset-block:.75rem;right:0;width:1px;z-index:10;background:#745d4238}.line-2{right:.35rem;opacity:.65}.line-3{right:.7rem;opacity:.35}.bottom-1{bottom:-.15rem;left:.4rem;right:.4rem}.bottom-2{bottom:-.34rem;left:.7rem;right:.7rem;opacity:.55}.book-content{position:relative;z-index:20;height:100%}@media(max-width:760px){.book-frame,.book-frame.is-spread{width:100%;height:45rem}.bookmark-ribbon{right:1.35rem;width:1.15rem;height:4.2rem}.bookmark-notch{border-left-width:.57rem;border-right-width:.57rem}}.coach-input{display:grid;gap:.7rem}.coach-input textarea{min-height:6.25rem;resize:none;padding:.95rem 1rem;border-radius:1rem;border:1px solid rgba(116,93,66,.16);background:#fffefb;color:var(--book-ink);font-size:.98rem;line-height:1.5;box-shadow:inset 0 1px #fff9}.coach-input textarea:focus{outline:none;border-color:#7a4e2b61;box-shadow:0 0 0 3px #bb936e24}.coach-input textarea:disabled{opacity:.72}.coach-input__actions{display:flex;align-items:center;justify-content:space-between;gap:.9rem}.coach-input__hint{margin:0;color:#846958;font-size:.83rem;line-height:1.35}.coach-input__button{flex:0 0 auto;border:0;border-radius:999px;padding:.78rem 1.25rem;background:#2f3e4f;color:#fff;font:700 .92rem/1 Lexend,sans-serif;cursor:pointer}.coach-input__button:disabled{opacity:.55;cursor:default}.coach-input__button--secondary{background:#815942}.coach-messages{min-height:0;overflow-y:auto;display:grid;gap:.85rem;align-content:start;padding-right:.25rem}.coach-message{display:grid;gap:.3rem;max-width:100%}.coach-message--user{justify-items:end}.coach-message__label{margin:0;font:700 .72rem/1 Lexend,sans-serif;letter-spacing:.08em;text-transform:uppercase;color:#846958}.coach-message__text{margin:0;max-width:100%;padding:.9rem 1rem;border-radius:1rem;font-size:.98rem;line-height:1.5;white-space:pre-wrap;word-break:break-word;box-shadow:0 10px 22px #0000000f}.coach-message--assistant .coach-message__text{background:#fffaf2;border:1px solid rgba(116,93,66,.12);color:var(--book-ink)}.coach-message--user .coach-message__text{background:#edf4ff;border:1px solid rgba(86,125,182,.14);color:#24405c}.coach-message--placeholder .coach-message__text{color:#7b6658}.coach-message__cursor{display:inline-block;width:.55ch;height:1em;margin-left:.12rem;vertical-align:text-bottom;background:currentColor;opacity:.55;animation:coach-cursor-blink 1s steps(1,end) infinite}.coach-error{padding:.85rem .95rem;border-radius:.95rem;background:#b64a3014;border:1px solid rgba(182,74,48,.16);color:#8d3f29;font-size:.92rem;line-height:1.45}@keyframes coach-cursor-blink{0%,50%{opacity:.55}50.01%,to{opacity:0}}.coach-sidebar{box-sizing:border-box;width:100%;height:min(46rem,calc(100vh - 5.5rem));max-height:calc(100vh - 5.5rem);display:grid;grid-template-rows:auto minmax(0,1fr) auto;border-radius:1.5rem;border:1px solid rgba(116,93,66,.14);background:#f9f4ebfa;box-shadow:0 20px 40px #0000001f;overflow:hidden}.coach-sidebar__header,.coach-sidebar__footer{padding:1rem 1rem .95rem;background:#fffbf4f5}.coach-sidebar__header{border-bottom:1px solid rgba(116,93,66,.1)}.coach-sidebar__body{display:grid;min-height:0;overflow:hidden;padding:1rem;background:linear-gradient(180deg,#fcf8f1f0,#f6efe4f5)}.coach-sidebar__footer{border-top:1px solid rgba(116,93,66,.1)}.coach-sidebar__eyebrow{margin:0 0 .28rem;color:#876650;font:700 .72rem/1 Lexend,sans-serif;letter-spacing:.08em;text-transform:uppercase}.coach-sidebar h2{margin:0;color:#2b2f35;font:700 1.15rem/1.2 Lexend,sans-serif}.coach-sidebar__subtitle{margin:.38rem 0 0;color:#6f5a4c;font-size:.92rem;line-height:1.45}@media(max-width:760px){.coach-sidebar{height:min(38rem,calc(100vh - 4rem));max-height:calc(100vh - 4rem)}}.cover{display:grid;align-items:start;justify-items:center;height:100%;min-height:0;align-self:stretch;padding:2.2rem 2.6rem 2.4rem;background:linear-gradient(180deg,#6c402f,#593321);color:#f9f1e4}.cover__inner{display:grid;justify-items:center;width:min(100%,34rem);grid-template-rows:7.8rem auto auto;gap:0;text-align:center}.cover__title-slot{display:grid;align-items:center;min-height:7.8rem;width:100%}.cover h1{margin:0;justify-self:center;max-width:30rem;font:600 1.4rem/1.1 Lexend,sans-serif;letter-spacing:.02em;text-wrap:pretty}.cover-media{position:relative;width:min(100%,29rem);padding:0;margin-top:.25rem}.cover-media__outer-frame,.cover-media__inner-frame{position:absolute;pointer-events:none;inset:0;border-radius:1.35rem}.cover-media__outer-frame{inset:-1.15rem;border:2px solid rgba(249,241,228,.18)}.cover-media__inner-frame{inset:-.4rem;border:1px solid rgba(255,214,84,.55);background:#ffd65414}.cover-media__corners{position:absolute;width:1.1rem;height:1.1rem;border-color:#ffd654b3;pointer-events:none}.corner--tl{top:-1.45rem;left:-1.45rem;border-top:2px solid;border-left:2px solid}.corner--tr{top:-1.45rem;right:-1.45rem;border-top:2px solid;border-right:2px solid}.corner--bl{bottom:-1.45rem;left:-1.45rem;border-bottom:2px solid;border-left:2px solid}.corner--br{right:-1.45rem;bottom:-1.45rem;border-right:2px solid;border-bottom:2px solid}.cover-media__panel{position:relative;overflow:hidden;border-radius:1rem;border:4px solid rgba(255,214,84,.82);box-shadow:0 20px 40px #00000047,inset 0 0 30px #00000047}.cover-media__video,.cover-media__image,.cover-media__placeholder{display:block;width:100%;aspect-ratio:1;object-fit:cover;object-position:50% 50%;background:#0000004d;transform:scale(1.22) translateY(7%);transform-origin:center}.cover-media__placeholder{background:radial-gradient(circle at 50% 26%,rgba(255,214,84,.2),transparent 28%),linear-gradient(180deg,#2a180ef2,#542f1be0)}.cover-media__shade{position:absolute;inset:0;background:linear-gradient(180deg,#0000000f,#00000038)}.cover__start{margin-top:2.35rem;border:0;border-radius:999px;padding:1rem 2.7rem;background:#fff6e7f5;color:#7a3d1f;font:700 1.04rem/1 Lexend,sans-serif;box-shadow:0 14px 26px #180b073d;cursor:pointer;transition:transform .14s ease,box-shadow .14s ease}.cover__start:hover{transform:translateY(-1px);box-shadow:0 16px 30px #180b0747}.narration-track{display:inline;color:inherit}.track-active{color:inherit}.narration-track__token{display:inline;padding:0;border:0;margin:0;background:transparent;color:inherit;font:inherit;line-height:inherit;text-align:inherit}.spoken-active{background:var(--book-highlight);border-radius:.18rem;box-shadow:inset 0 -.45rem 0 var(--book-highlight)}.narration-track__token--story-vocab{text-decoration-line:underline;text-decoration-thickness:2px;text-decoration-color:color-mix(in srgb,var(--book-primary-strong) 72%,transparent);text-underline-offset:.16em;text-decoration-skip-ink:none;cursor:help}.phrase-underlined{text-decoration-line:underline;text-decoration-thickness:2px;text-decoration-color:color-mix(in srgb,var(--book-primary-strong) 78%,transparent);text-underline-offset:.14em}.passage.is-muted{color:color-mix(in srgb,var(--book-muted) 82%,transparent)}.image-panel{margin:0;position:relative;display:grid;place-items:center;overflow:hidden}.image-panel img{display:block;width:auto;max-width:100%;height:auto;max-height:min(58vh,38rem)}.page-title-block__eyebrow{margin:0;font-size:.99rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--book-muted)}.categorization{display:grid;gap:1rem;min-width:0}.categorization-grid{--categorization-work-area-height: clamp(20rem, 42vh, 25rem);display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.15fr);gap:1rem;align-items:start}.categorization-grid.is-definition-match{grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr)}.panel{min-width:0;min-height:0;display:grid;gap:.72rem;align-content:start}.panel--bank{grid-template-rows:auto minmax(0,1fr)}.panel__header{display:grid;gap:.16rem}.panel__header h3,.panel__header p{margin:0}.panel__header h3{font-size:.94rem;line-height:1.2;font-weight:800;color:var(--book-primary-strong);text-transform:uppercase;letter-spacing:.05em}.panel__header p{font-size:.9rem;line-height:1.38;color:var(--book-muted)}.bank__grid{min-height:0;height:var(--categorization-work-area-height);display:grid;grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-rows:minmax(4.85rem,max-content);gap:.72rem;align-content:start;padding:.82rem;border-radius:1.2rem;border:2px solid rgba(116,93,66,.15);background:#faf5ebe0;overflow-y:auto}.bank__grid.is-text-bank{display:flex;flex-wrap:wrap;justify-content:flex-start;align-content:flex-start;gap:.62rem}.bank__grid.is-empty:before{content:"All items are placed.";align-self:center;justify-self:center;color:var(--book-muted);font-size:.95rem;line-height:1.4;font-weight:600}.panel--categories{min-height:0}.categories__list{min-height:0;height:var(--categorization-work-area-height);display:grid;gap:.62rem}.categories__list.is-definition-match{height:auto;align-content:start}.sentence-rows{min-height:0;height:auto;display:grid;gap:.62rem;align-content:start}.category-row{min-height:0;display:grid;grid-template-columns:minmax(9.75rem,11rem) minmax(0,1fr);gap:.62rem;align-items:stretch}.category-row.is-definition-match{grid-template-columns:minmax(0,1fr) 7.45rem;gap:.72rem}.category-row__label{min-height:0;height:100%;display:grid;place-items:center;padding:.8rem .72rem;border-radius:1rem;border:2px solid rgba(116,93,66,.12);background:#ebe1cf9e;text-align:center;font-size:.88rem;line-height:1.2;font-weight:800;color:var(--book-primary-strong);box-sizing:border-box}.category-row__label.is-definition-match{min-height:4.7rem;place-items:center start;padding:.88rem 1.05rem;text-align:left;font-size:.94rem;line-height:1.32}.category-row__dropzone{min-height:0;height:100%;display:grid;grid-template-columns:repeat(2,minmax(0,7.9rem));grid-auto-rows:min-content;justify-content:start;align-content:start;gap:.62rem;padding:.76rem;border-radius:1rem;border:2px dashed rgba(116,93,66,.22);background:#fffbf3f0;overflow-y:auto;box-sizing:border-box}.category-row__dropzone.is-definition-match{min-height:3.35rem;height:3.35rem;grid-template-columns:minmax(0,1fr);justify-items:center;align-content:center;gap:0;padding:.05rem;overflow:hidden;align-self:center}.category-row__dropzone.is-empty:before{content:"Drop items here"}.category-row__dropzone.is-definition-match.is-empty:before{content:"Drop word"}.sentence-row{min-height:0;display:grid;align-items:center;padding:.72rem .95rem;border-radius:1rem;border:2px solid rgba(116,93,66,.12);background:#fffbf3f0}.sentence-row__text{margin:0;display:block;font-size:.98rem;line-height:1.7;font-weight:700;color:var(--book-ink)}.sentence-row__prefix,.sentence-row__suffix{display:inline;overflow-wrap:anywhere}.sentence-row__blank{display:inline-flex;align-items:stretch;justify-content:center;vertical-align:baseline;margin:0 .2rem;width:7.45rem;min-width:7.45rem;max-width:min(100%,7.45rem);height:3.35rem;min-height:3.35rem;padding:.05rem;border-radius:1rem;border:2px dashed rgba(116,93,66,.24);background:#faf5ebeb;box-sizing:border-box;overflow:hidden}.sentence-row__blank.is-empty:before{content:"Drop word";display:inline-flex;min-height:100%;align-items:center;justify-content:center;padding:0 .8rem;color:var(--book-muted);font-size:.85rem}.categorization-card{min-width:0;display:grid;justify-items:center;align-content:center;gap:.5rem;padding:.72rem .8rem;border-radius:1rem;border:2px solid rgba(116,93,66,.18);background:#fffcf5fa;box-shadow:0 10px 18px #0000000f;text-align:center;box-sizing:border-box}.categorization-drag-overlay .categorization-card__text,.categorization-drag-overlay .categorization-card__descriptor{display:block}.categorization-drag-overlay .categorization-card__text{font-size:1rem;line-height:1.3;font-weight:800;color:var(--book-primary-strong)}.categorization-drag-overlay .categorization-card__descriptor{font-size:.88rem;line-height:1.2;color:var(--book-muted);font-weight:700}.categorization-drag-overlay img{width:min(100%,5.2rem);height:4.2rem;object-fit:contain}.categorization-drag-overlay{min-width:0;box-sizing:border-box;display:grid;justify-items:center;align-content:center;gap:.5rem;pointer-events:none;box-shadow:0 22px 34px #00000029}.categorization-card--sentence,.category-row__dropzone.is-definition-match .categorization-card{width:100%;min-height:100%;box-shadow:none}.categorization-card--text{min-height:4rem}.categorization-card.is-correct{border-color:#4d8a6375;background:#ecf7eff5}.categorization-card.is-incorrect{border-color:#b24c3b6b;background:#fcefecf5}.categorization-card img{width:min(100%,5.2rem);height:4.2rem;object-fit:contain}.categorization-card__text,.categorization-card__descriptor{overflow-wrap:anywhere}.categorization-card__text{font-size:1rem;line-height:1.3;font-weight:800;color:var(--book-primary-strong)}.categorization-card__descriptor{font-size:.88rem;line-height:1.2;color:var(--book-muted);font-weight:700}.categorization__actions{display:flex;justify-content:center;padding-top:.15rem}button{justify-self:center;padding:1rem 2.75rem;border:0;border-radius:999px;background:var(--book-primary);color:#fff8ee;font-size:1.08rem;font-weight:700;cursor:pointer;transition:opacity .14s ease,transform .14s ease}button:disabled{opacity:.72}@media(max-width:760px){.categorization-grid,.categorization-grid.is-definition-match{grid-template-columns:minmax(0,1fr)}.bank__grid,.categories__list{height:auto;max-height:none}.category-row,.category-row.is-definition-match{grid-template-columns:minmax(0,1fr)}.category-row__dropzone{grid-template-columns:repeat(2,minmax(0,1fr))}.sentence-row__text{display:grid;gap:.55rem}.sentence-row__blank{margin:0;max-width:100%}}.options{display:grid;gap:1rem;margin-top:.15rem}.choice-option{display:flex;align-items:center;gap:1.15rem;width:100%;padding:1.3rem 1.25rem;border:2px solid rgba(116,93,66,.2);border-radius:1rem;background:#fffcf5fa;text-align:left;color:var(--book-ink);cursor:pointer;transition:transform .14s ease,border-color .14s ease,box-shadow .14s ease,background .14s ease}.choice-option:hover:enabled{transform:translateY(-1px);border-color:#8b4b3461;box-shadow:0 18px 28px #00000014;background:#fffcf5}.choice-option.is-selected{border-color:#8b4b346b;background:#fbf4e8;box-shadow:0 12px 22px #6f372414}.choice-option.is-correct{border-color:#4d8a6380;background:#ebf6eefa}.choice-option.is-incorrect{border-color:#b24c3b75;background:#fcefecfa}.choice-option:disabled{opacity:.82}.option-badge{display:grid;place-items:center;width:2.8rem;height:2.8rem;border-radius:999px;border:2px solid rgba(116,93,66,.16);background:#fffcf5eb;color:var(--book-muted);font-size:1rem;font-weight:700;flex-shrink:0}.choice-option.is-selected .option-badge,.choice-option.is-correct .option-badge,.choice-option.is-incorrect .option-badge{border-color:#8b4b3438;color:var(--book-primary)}.choice-option.is-correct .option-badge{color:var(--book-success)}.choice-option.is-incorrect .option-badge{color:var(--book-error)}.option-text{font-size:1.12rem;line-height:1.65;letter-spacing:.01em}.text-answer{display:grid;gap:1rem;margin-top:.2rem}.support-copy{margin:0;border:2px solid rgba(116,93,66,.14);border-radius:1.05rem;background:#f1e7d66b;padding:1rem 1.15rem;font-size:1rem;line-height:1.65;color:var(--book-muted)}textarea{min-height:7.4rem;resize:none;padding:1.3rem;border:2px solid rgba(116,93,66,.18);border-radius:1.15rem;background:#fffcf5f0;color:var(--book-ink);box-shadow:0 10px 20px #0000000b;font-size:1.06rem;line-height:1.58;letter-spacing:.01em}textarea:focus{outline:none;border-color:#7a4e2b6b}textarea.is-correct{border-color:#4d8a637a;background:#f0f8f2f5}textarea.is-incorrect{border-color:#b24c3b6b;background:#fdf4f1f5}.answer-meta{display:flex;justify-content:flex-start;gap:.75rem;font-size:.95rem;color:var(--book-muted)}.coach-note{margin:-.2rem 0 0;color:var(--book-primary);font-size:.95rem;line-height:1.45;font-weight:700}button{justify-self:center;margin-top:.35rem;padding:1rem 2.35rem;border:0;border-radius:999px;background:var(--book-primary);color:#fff8ee;font-size:1.02rem;font-weight:700;cursor:pointer;transition:transform .14s ease,opacity .14s ease,box-shadow .14s ease;box-shadow:0 12px 22px #6f37243d}button:disabled,textarea:disabled{opacity:.7}@media(max-width:760px){.answer-meta{justify-content:center}}.fill-blank{display:grid;gap:1.35rem;margin-top:0}.sentences{display:grid}.sentence{margin:0;font-size:1.42rem;line-height:2.05;letter-spacing:.015em;color:var(--book-ink)}.inline-blank{position:relative;display:inline-flex;align-items:center;vertical-align:middle;width:9rem;margin:0 .18rem}input{display:block;width:100%;border:0;border-bottom:3px solid rgba(122,78,43,.42);background:transparent;padding:.15rem 1.35rem .35rem .4rem;text-align:center;font-size:1.32rem;font-weight:700;color:var(--book-primary);transition:border-color .14s ease,color .14s ease,opacity .14s ease}input:focus{outline:none;border-bottom-color:var(--book-primary)}input.is-correct{border-bottom-color:var(--book-success);color:var(--book-success)}input.is-incorrect{border-bottom-color:var(--book-error);color:var(--book-error)}.blank-status{display:inline-flex;align-items:center;justify-content:center}.blank-status--correct{color:var(--book-success)}.blank-status--incorrect{color:var(--book-error)}.blank-status-slot{position:absolute;right:.28rem;top:50%;transform:translateY(-50%);display:flex;align-items:center;justify-content:center;width:1.25rem;height:1.25rem;pointer-events:none}button{justify-self:center;margin-top:.15rem;padding:1rem 2.75rem;border:0;border-radius:999px;background:var(--book-primary);color:#fff8ee;font-size:1.08rem;font-weight:700;cursor:pointer;transition:opacity .14s ease,transform .14s ease}button:hover:enabled{transform:translateY(-1px)}button:disabled,input:disabled{opacity:.72}.results{margin:.1rem 0 0;text-align:center;font-size:1.18rem;line-height:1.4;font-weight:700;color:var(--book-ink)}.results.is-perfect{color:var(--book-success)}.results-perfect{display:inline-flex;align-items:center;justify-content:center;gap:.65rem}@media(max-width:760px){.sentence{font-size:1.16rem;line-height:1.9}input{width:100%;font-size:1.08rem}.inline-blank{width:7.6rem;padding-right:1.38rem}}.question{display:grid;gap:1.1rem;color:var(--book-ink);width:100%}.question-prompt{display:block;font-size:clamp(1.65rem,3vw,2.05rem);line-height:1.55;font-weight:700;letter-spacing:.01em;text-wrap:balance}.question.is-short-answer .question-prompt{font-size:clamp(1.4rem,2.35vw,1.72rem);line-height:1.48}.question.is-fill-blank .question-prompt{font-size:1.1rem;line-height:1.6;font-weight:600;color:var(--book-muted)}.question.is-categorization .question-prompt{font-size:clamp(1.18rem,1.65vw,1.42rem);line-height:1.5}.question-body{display:grid;gap:1.05rem}.timer{display:grid;gap:.4rem}.timer__track{position:relative;overflow:hidden;width:100%;height:.5rem;border-radius:999px;background:#745d421f}.timer__fill{position:absolute;inset:0;transform-origin:left center;background:linear-gradient(90deg,#c46d3bf2,#e8a846f2)}.timer__label{margin:0;font-size:.9rem;line-height:1.2;font-weight:700;color:var(--book-primary)}.submission-status{margin:-.1rem 0 0;text-align:center;font-size:.98rem;line-height:1.4;font-weight:700;color:var(--book-primary)}.feedback{margin:0;display:block;text-align:left;font-size:1.16rem;line-height:1.45;font-weight:700}.feedback.is-positive{color:var(--book-success)}.feedback.is-negative{color:var(--book-error)}.video-panel{margin:0;position:relative;overflow:hidden;border-radius:1.15rem;border:2px solid rgba(116,93,66,.16);background:#2f291f14;box-shadow:0 20px 36px #20170e1a}.video-panel__video,.video-panel__poster{display:block;width:100%;max-height:min(58vh,38rem);background:#2f291f2e;object-fit:cover;object-position:50% 0}.video-panel.is-active{border-color:#8b4b343d}.vocabulary{display:grid;justify-items:start;gap:1.55rem;color:var(--book-ink);text-align:left;width:100%}.vocabulary-word{display:block;font-size:clamp(2.35rem,4vw,3.2rem);line-height:1.02;letter-spacing:-.02em;color:var(--book-primary-strong);font-weight:800}.vocabulary-definition{width:100%}.vocabulary-image-slot{width:100%;display:grid;justify-items:center}.vocabulary-image-frame{margin:0;width:min(100%,24rem);overflow:hidden;border-radius:1.35rem;background:#f8f2e7e6;box-shadow:0 18px 32px #46261424}.vocabulary-image{display:block;width:100%;aspect-ratio:4 / 3;object-fit:cover}.vocabulary-card{width:100%;display:grid;gap:.75rem;padding:0;border:0;border-radius:0;background:transparent}.vocabulary-label{margin:0;font-size:.82rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--book-muted)}.vocabulary-copy{margin:0;font-size:clamp(1.1rem,2vw,1.45rem);line-height:1.58;letter-spacing:.01em}.vocabulary-copy--example{font-size:clamp(1.02rem,1.8vw,1.2rem);line-height:1.62;color:color-mix(in srgb,var(--book-ink) 84%,white)}.vocabulary-audio-hint{display:inline-flex;align-items:center;gap:.75rem;justify-self:start;margin-top:.35rem;padding:.92rem 1.45rem;border:2px solid rgba(139,75,52,.18);border-radius:999px;background:#8b4b340d;color:var(--book-primary);font-size:1rem;font-weight:500;cursor:pointer;transition:border-color .14s ease,background .14s ease,transform .14s ease}.vocabulary-audio-hint:hover{border-color:#8b4b3461;background:#8b4b341a;transform:translateY(-1px)}.page-title-block{display:flex;gap:.95rem;align-items:center;width:100%;color:var(--book-ink)}.page-title-block.is-center{flex-direction:column;align-items:center;text-align:center}.page-title-block__icon{display:grid;place-items:center;width:3.05rem;height:3.05rem;border-radius:999px;background:#6a8f571f;color:var(--book-accent);flex-shrink:0}.page-title-block__icon.is-primary{background:#8b4b341f;color:var(--book-primary-strong)}.page-title-block__content{display:grid;gap:.18rem;min-width:0;width:100%}.page-title-block.is-center .page-title-block__content{justify-items:center}.page-title-block__title{font-size:clamp(1.15rem,1.45vw,1.45rem);line-height:1.2;font-weight:700;letter-spacing:.005em;color:color-mix(in srgb,var(--book-ink) 88%,white);text-wrap:balance}.page-title-block__title.is-display{font-size:clamp(3rem,6vw,4.35rem);line-height:.98;letter-spacing:-.03em;color:var(--book-primary-strong)}.page-title-block__body{width:100%}.one-pane{box-sizing:border-box;width:min(100%,46rem);height:100%;overflow-y:auto;display:grid;gap:1.4rem;align-content:start;justify-self:center;padding:3.75rem 2.25rem 2.25rem}.one-pane.has-inline-image-narration{width:min(100%,48rem);overflow-y:auto}.one-pane-inline-media-stack{min-height:auto;height:auto;width:100%;display:grid;grid-template-rows:auto auto;gap:1.15rem;align-content:start}.one-pane-inline-media-visual{min-height:auto;overflow:visible;display:grid;justify-items:center;align-items:start}.one-pane-inline-media-visual .image-panel{width:100%;height:auto;max-height:20rem;align-items:start;border-radius:1.35rem;border:1px solid rgba(116,93,66,.16);box-shadow:0 18px 32px #27160a14}.one-pane-inline-media-visual .image-panel img{width:100%;height:auto;max-width:100%;max-height:20rem;object-fit:contain;object-position:center}.one-pane-inline-copy{width:min(100%,42rem);display:grid;justify-self:center}.one-pane.is-cover{width:100%;padding:0;overflow:hidden;align-content:stretch;grid-template-rows:minmax(0,1fr);justify-self:stretch}.one-pane.is-vocabulary{width:min(100%,36rem);align-content:start;padding-top:2.25rem;padding-bottom:2.25rem}.one-pane.is-question{width:min(100%,34rem);align-content:start;padding-top:2.2rem;padding-bottom:1.75rem}.one-pane.is-question.is-wide-question{width:min(100%,68rem)}@media(max-width:760px){.one-pane{padding:3.5rem 1.25rem 1.4rem}}.passage{max-width:42rem;width:100%;color:var(--book-ink);font:500 1.08rem/1.78 Lexend,sans-serif;letter-spacing:.002em;text-wrap:pretty}.passage-segment.is-muted{color:color-mix(in srgb,var(--book-muted) 82%,transparent)}.passage-gap{white-space:pre}@media(max-width:760px){.passage{font-size:1rem;line-height:1.72}}.pane-visual-stack{position:relative;min-height:0;height:100%;display:grid;align-items:center}.pane-inline-media-stack{display:grid;grid-template-rows:minmax(0,1fr) auto;gap:1.15rem;min-height:0;height:100%;width:100%}.pane-inline-media-visual{min-height:0;width:100%;display:grid;justify-items:center;align-items:start;overflow:hidden}.pane-inline-media-visual .image-panel{width:100%;height:100%;max-height:none;align-items:start}.pane-inline-media-visual .image-panel img{width:100%;height:100%;max-width:none;max-height:none;object-fit:cover;object-position:center top}.pane-inline-copy{width:100%;display:grid;justify-items:stretch;text-align:left;align-self:end;padding-inline:.35rem .15rem}.pane-inline-copy .passage{max-width:none}.pane-overlay{position:absolute;inset:1rem 1rem auto;display:grid;gap:.9rem;align-content:start;z-index:5}.pane-overlay .question{padding:1rem 1rem 1.15rem;background:#f8f2e7f5;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);box-shadow:0 20px 34px #0000002e}.pane-overlay .page-title-block{display:none}.pane-overlay .question-prompt{font-size:clamp(1.15rem,1.45vw,1.38rem);line-height:1.34;font-weight:700;text-wrap:pretty}.pane-overlay .question-body{gap:.8rem}.pane-overlay .options{gap:.75rem;margin-top:0}.pane-overlay .options button{gap:.95rem;padding:.95rem 1rem;border-radius:.9rem}.pane-overlay .option-badge{width:2.25rem;height:2.25rem;font-size:.92rem}.two-pane{box-sizing:border-box;height:100%;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:0}.pane{box-sizing:border-box;position:relative;display:grid;min-height:0;gap:1rem;align-content:start;overflow:hidden}.pane--text{padding:4.35rem 2.35rem 1.9rem 2.7rem;border-right:1px solid rgba(116,93,66,.18)}.two-pane.is-story .pane{gap:.55rem}.two-pane.is-story .pane--text{padding:2.2rem 1.4rem 1.6rem}.two-pane.is-story .passage{text-indent:1.1rem}.pane--text:after{content:"";pointer-events:none;position:absolute;inset-block:0;right:0;width:1.8rem;background:linear-gradient(to left,rgba(0,0,0,.07),rgba(0,0,0,.025) 42%,transparent)}.pane--visual{padding:4.35rem 2.45rem 1.9rem 2.2rem}.story-reading{display:grid;gap:0;width:100%;color:var(--book-ink)}.story-reading.is-story{gap:1.1rem;width:100%}.story-reading__header{box-sizing:border-box;width:100%;max-width:28rem;padding-inline:3.6rem 3.2rem}.story-reading__body{box-sizing:border-box;width:100%;padding-left:1rem;position:relative}.story-reading__overlay{position:absolute;inset:0;display:grid;align-content:start;padding:1rem .35rem 0;z-index:6}.story-reading__overlay:before{content:"";position:absolute;inset:0;border-radius:1.2rem;background:linear-gradient(180deg,#f8f2e7c7,#f8f2e79e 52%,#f8f2e785);-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.story-reading__overlay>*{position:relative;z-index:1}.story-reading__overlay .question{padding:1rem 1rem 1.15rem;background:#f8f2e7fa;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);box-shadow:0 20px 34px #00000029}.story-reading__overlay .page-title-block{display:none}.story-reading__overlay .question-prompt{font-size:clamp(1.1rem,1.4vw,1.32rem);line-height:1.36;font-weight:700;text-wrap:pretty}.story-reading__overlay .question-body{gap:.8rem}.story-reading__overlay .options{gap:.7rem;margin-top:0}.story-reading__overlay .options button{gap:.95rem;padding:.92rem 1rem;border-radius:.9rem}.story-reading__overlay .option-badge{width:2.2rem;height:2.2rem;font-size:.9rem}.story-reading__overlay .option-text{font-size:.98rem;line-height:1.42}.story-reading__overlay .feedback{font-size:.98rem;line-height:1.38}.story-visual-placeholder{width:100%;height:100%;min-height:18rem;border-radius:1.45rem;border:1px solid rgba(116,93,66,.14);background:radial-gradient(circle at 20% 18%,rgba(196,151,104,.12),transparent 26%),linear-gradient(180deg,#f6efe2f0,#efe5d5e0);box-shadow:inset 0 1px #ffffff73}.story-vocab-hover-card{position:absolute;inset:3rem 2.25rem auto 2rem;display:grid;gap:.4rem;max-width:20rem;padding:1.4rem 1.45rem;border:1px solid rgba(116,93,66,.2);border-radius:1.2rem;background:#f8f2e7f5;box-shadow:0 18px 34px #00000029;z-index:7;text-align:center;justify-self:center}.story-vocab-hover-card__eyebrow,.story-vocab-hover-card__part-of-speech,.story-vocab-hover-card__definition{margin:0}.story-vocab-hover-card__eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--book-muted)}.story-vocab-hover-card h3{margin:0;font-size:clamp(2rem,3vw,2.55rem);line-height:1.04;color:var(--book-primary-strong)}.story-vocab-hover-card__part-of-speech{font-size:.95rem;font-style:italic;color:var(--book-muted)}.story-vocab-hover-card__definition{font-size:1.08rem;line-height:1.65;color:var(--book-ink)}.pane--visual:before{content:"";pointer-events:none;position:absolute;inset-block:0;left:0;width:1.8rem;background:linear-gradient(to right,rgba(0,0,0,.05),rgba(0,0,0,.015) 42%,transparent)}@media(max-width:900px){.two-pane{grid-template-columns:1fr}.pane--text,.pane--visual{padding:4.35rem 1.3rem 1.45rem;border-right:0}.two-pane.is-story .pane--text,.two-pane.is-story .pane--visual{padding:4.05rem 1.35rem 1.35rem}.pane--text:after,.pane--visual:before{display:none}.story-vocab-hover-card{inset:2rem 1.25rem auto;max-width:none}}.auth-shell{min-height:100vh;display:grid;place-items:center;padding:2rem;background:radial-gradient(circle at top,rgba(199,214,255,.9),transparent 35%),linear-gradient(180deg,#f6f1e8,#efe4d4)}.auth-card{width:min(100%,28rem);padding:2rem;border-radius:1.5rem;background:#fffcf6f5;box-shadow:0 18px 50px #47351224;border:1px solid rgba(94,72,28,.12);display:grid;justify-items:center}.auth-eyebrow{margin:0 0 .5rem;font-size:.75rem;letter-spacing:.16em;text-transform:uppercase;color:#84622a}.auth-card h1{margin:0;font-size:clamp(1.75rem,4vw,2.5rem);line-height:1.05;color:#241508;text-align:center}.auth-copy{margin:.75rem 0 1.5rem;color:#5c4930;max-width:24rem;text-align:center}.auth-mode-toggle{display:inline-flex;gap:.45rem;padding:.35rem;border-radius:999px;background:#8a672e14;margin-bottom:1rem}.auth-mode-toggle__button{border:none;border-radius:999px;background:transparent;color:#6c5334;padding:.65rem .95rem;font:700 .9rem/1 Lexend,sans-serif;cursor:pointer}.auth-mode-toggle__button--active{background:#fffdf9;color:#2f1c0e;box-shadow:0 8px 16px #4630111f}.auth-form{width:100%;display:grid;gap:.8rem}.auth-form label{display:grid;gap:.35rem;width:100%}.auth-form label span{color:#5e4930;font-size:.82rem;font-weight:700}.auth-form input{width:100%;border:1px solid rgba(109,84,45,.2);border-radius:.9rem;padding:.8rem .9rem;font:inherit;background:#fffdf8;color:#2d1a0f}.auth-form button{border:none;border-radius:.95rem;padding:.85rem 1rem;background:#3f2b16;color:#fff8ee;font:700 .95rem/1 Lexend,sans-serif;cursor:pointer}.auth-form button:disabled{cursor:default;opacity:.7}.auth-submit-button{width:100%;border:none;border-radius:.95rem;padding:.85rem 1rem;background:#3f2b16;color:#fff8ee;font:700 .95rem/1 Lexend,sans-serif;cursor:pointer;margin-bottom:1rem}.auth-submit-button:disabled{cursor:default;opacity:.7}.auth-submit-button--secondary{background:#fff7ec;color:#3f2b16;border:1px solid rgba(109,84,45,.2)}.auth-error{margin:1rem 0 0;color:#a23018;font-weight:600;text-align:center}.lesson-player-shell{min-height:100vh}.lesson-back-link{position:fixed;top:1rem;left:1rem;z-index:40;display:inline-flex;align-items:center;gap:.35rem;padding:.45rem .7rem;border-radius:999px;border:1px solid rgba(255,246,235,.35);background:#2e1b0fb8;color:#fff6eb;text-decoration:none;font-size:.88rem;font-weight:600;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.lesson-status{min-height:100vh;display:grid;place-items:center;padding:2rem;background:transparent;color:#fff6eb;text-shadow:0 2px 10px rgba(0,0,0,.24);font-size:1.1rem}.lesson-status--error{color:#ffd8c7}.lesson-select{min-height:100vh;padding:2.5rem 2rem 3rem;background:#f5efe6}.lesson-select__content{width:min(100%,68rem);margin:0 auto;display:grid;gap:2rem}.lesson-select__header{display:flex;align-items:start;justify-content:space-between;gap:2rem}.lesson-select__title-block{max-width:36rem}.lesson-select__eyebrow{margin:0 0 .45rem;color:#7b5a35;font-size:.76rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase}.lesson-select h1{margin:0;color:#2e1b0f;font-size:clamp(1.9rem,4vw,2.8rem);line-height:1.02}.lesson-select__copy{margin:.6rem 0 0;color:#5e4933}.lesson-select__account{display:grid;gap:.3rem;min-width:15rem;justify-items:start;padding-top:.25rem}.lesson-select__account-label,.lesson-select__account-name,.lesson-select__account-detail{margin:0}.lesson-select__account-label{color:#7b5a35;font-size:.76rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}.lesson-select__account-name{margin-top:.35rem;color:#2e1b0f;font-size:1.05rem;font-weight:700}.lesson-select__account-detail{color:#6b5640;font-size:.9rem}.lesson-select__signout,.lesson-select__reset{margin-top:.9rem;border:1px solid rgba(94,73,51,.2);border-radius:.8rem;padding:.7rem 1rem;background:#fffaf2;color:#3d2917;font-weight:700;cursor:pointer}.lesson-select__main{display:grid}.lesson-select__section{display:grid;gap:1rem}.lesson-select__section-header{display:flex;align-items:baseline;justify-content:space-between;gap:1rem;flex-wrap:wrap}.lesson-select__section-title{display:grid;gap:.2rem}.lesson-select__debug-toggle{display:inline-flex;align-items:center;gap:.65rem;padding:.55rem .8rem;border-radius:.8rem;border:1px solid rgba(94,73,51,.16);background:#fffaf3;color:#4b3623;font-size:.95rem;font-weight:600}.lesson-select__debug-toggle input{margin:0;width:1rem;height:1rem}.lesson-select__section-copy,.lesson-select__error{margin:0;color:#6b5640;font-size:.92rem}.lesson-select__error{color:#8b2716}.lesson-select__list{display:grid;gap:1rem}.lesson-select__lesson{display:grid;gap:.7rem;padding:1rem;border-radius:1.25rem;background:#fffbf4e0;border:1px solid rgba(94,73,51,.12);box-shadow:0 16px 30px #45301414}.lesson-select__lesson-link{display:grid;gap:.55rem;color:inherit;text-decoration:none}.lesson-select__lesson-head{display:flex;align-items:center;justify-content:space-between;gap:1rem}.lesson-select__lesson-title{color:#241508;font-size:1.05rem;font-weight:700}.lesson-select__lesson-status{color:#7b5a35;font-size:.82rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em}.lesson-select__lesson-copy{color:#5e4933}.lesson-select__lesson-action{color:#2f63a4;font-weight:700}