@import"https://fonts.googleapis.com/css2?family=Noto+Sans+Thai:wght@400;500;700&family=Inter:wght@400;500;600;700&display=swap";*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--bg: #FFFFFF;--bg-subtle: #F7F8FA;--bg-hover: #F0F2F5;--bg-scrimmed: #999999;--bg-subtle-scrimmed: #949596;--line-strong: #C8CDD6;--text: #1A1D23;--text-secondary: #6B7280;--text-hint: #9CA3AF;--accent: #4B6FE4;--accent-light: #EEF1FD;--accent-dark: #3558C8;--success: #22C55E;--success-light: #F0FDF4;--danger: #EF4444;--danger-light: #FEF2F2;--border: #E5E7EB;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--radius-xl: 24px;--font-sans: "Inter", system-ui, sans-serif;--font-thai: system-ui, sans-serif;--shadow-sm: 0 1px 3px rgba(0,0,0,.08);--shadow-md: 0 4px 12px rgba(0,0,0,.1);--desktop-bg: #ECEEF2}:root[data-theme=dark]{--bg: #16181D;--bg-subtle: #1D2027;--bg-hover: #262A33;--bg-scrimmed: #0D0E11;--bg-subtle-scrimmed: #111317;--line-strong: #3C424C;--text: #E8EAED;--text-secondary: #9CA3AF;--text-hint: #6B7280;--accent: #7C9CFF;--accent-light: #232B45;--accent-dark: #A9BEFF;--success: #4ADE80;--success-light: #17301F;--danger: #F87171;--danger-light: #3A1919;--border: #2E3239;--shadow-sm: 0 1px 3px rgba(0,0,0,.35);--shadow-md: 0 4px 16px rgba(0,0,0,.45);--desktop-bg: #0E1013}@media(prefers-color-scheme:dark){:root:not([data-theme=light]){--bg: #16181D;--bg-subtle: #1D2027;--bg-hover: #262A33;--bg-scrimmed: #0D0E11;--bg-subtle-scrimmed: #111317;--line-strong: #3C424C;--text: #E8EAED;--text-secondary: #9CA3AF;--text-hint: #6B7280;--accent: #7C9CFF;--accent-light: #232B45;--accent-dark: #A9BEFF;--success: #4ADE80;--success-light: #17301F;--danger: #F87171;--danger-light: #3A1919;--border: #2E3239;--shadow-sm: 0 1px 3px rgba(0,0,0,.35);--shadow-md: 0 4px 16px rgba(0,0,0,.45);--desktop-bg: #0E1013}}html,body,#root{height:100%}body{font-family:var(--font-sans);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:15px;line-height:1.5;transition:background-color .15s,color .15s}#root{display:flex;justify-content:center}.app-shell{width:100%;max-width:520px;min-height:100vh;display:flex;flex-direction:column;background:var(--bg);position:relative}.app-shell:not(.app-shell--admin){height:100%;height:100dvh;min-height:0;overflow:hidden}.app-shell:not(.app-shell--admin)>main{overflow-y:auto;min-height:0;overscroll-behavior-y:contain}@media(min-width:900px){body{background:var(--desktop-bg)}#root{align-items:stretch;min-height:100vh;max-width:1100px;margin:0 auto;gap:0}.app-shell{min-height:100vh;box-shadow:var(--shadow-md);flex-shrink:0}.desktop-panel{display:flex!important}}.tab-nav{display:flex;background:var(--bg);border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom)}.tab-nav__item{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;padding:7px 4px 6px;font-size:11px;font-weight:500;color:var(--text-secondary);text-decoration:none;-webkit-tap-highlight-color:transparent}.tab-nav__item[aria-current=page]{color:var(--accent);font-weight:600}@media(min-width:900px){.app-shell>header{order:1}.tab-nav{order:2}.app-shell>main{order:3}.tab-nav{border-top:none;border-bottom:1px solid var(--border);padding-bottom:0}.tab-nav__item{flex-direction:row;gap:7px;font-size:13px;padding:.7rem .4rem}}.desktop-panel{display:none;flex:1;flex-direction:column;justify-content:center;padding:3rem 2.5rem;position:relative;overflow:hidden}.desktop-panel__bg{position:absolute;inset:0;display:flex;flex-wrap:wrap;align-content:center;gap:0;pointer-events:none;-webkit-user-select:none;user-select:none}.desktop-panel__bg span{font-family:var(--font-thai);font-size:72px;font-weight:700;color:#4b6fe412;line-height:1.1;display:block;width:25%;text-align:center}.desktop-panel__content{position:relative;z-index:1}.desktop-panel__badge{display:inline-flex;align-items:center;gap:6px;padding:5px 12px;background:var(--accent-light);border:1px solid rgba(75,111,228,.2);border-radius:var(--radius-xl);margin-bottom:1.25rem}.desktop-panel__badge-thai{font-family:var(--font-thai);font-size:16px;font-weight:700;color:var(--accent);line-height:1}.desktop-panel__badge-label{font-size:12px;font-weight:600;color:var(--accent);letter-spacing:.04em}.desktop-panel__tagline{font-size:22px;font-weight:600;color:var(--text);margin-bottom:.5rem;line-height:1.3}.desktop-panel__sub{font-size:14px;color:var(--text-secondary);line-height:1.6;max-width:240px}.desktop-panel__words{margin-top:2.5rem;display:flex;flex-direction:column;gap:10px}.desktop-panel__word{display:flex;align-items:baseline;gap:10px}.desktop-panel__word-thai{font-family:var(--font-thai);font-size:20px;font-weight:500;color:var(--accent)}.desktop-panel__word-meaning{font-size:13px;color:var(--text-hint)}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}@keyframes pulse{0%,to{opacity:1}50%{opacity:.3}}@keyframes spin{to{transform:rotate(360deg)}}.skeleton{background:linear-gradient(90deg,var(--border) 25%,var(--bg-hover) 50%,var(--border) 75%);background-size:200% 100%;animation:shimmer 1.4s ease-in-out infinite;border-radius:var(--radius-md)}.card{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-lg)}.thai{font-family:var(--font-thai)}button{font-family:var(--font-sans);cursor:pointer;color:inherit}body.admin-mode #root{display:block;max-width:none;margin:0}.app-shell--admin{max-width:none}@media(min-width:900px){.app-shell--admin{max-width:1600px;margin:0 auto;box-shadow:none}}body.admin-mode .app-shell--admin>main{display:flex}.admin-layout{display:flex;flex-direction:column;flex:1;min-width:0}.admin-rail{display:flex;gap:6px;padding:.75rem 1rem;overflow-x:auto;border-bottom:1px solid var(--border);background:var(--bg)}.admin-rail__brand{display:none}.admin-rail__footer{display:flex;align-items:center;gap:10px;margin-left:auto;flex-shrink:0}.admin-rail__user{font-size:11px;color:var(--text-hint);max-width:140px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.admin-rail__signout{font-size:11px;color:var(--text-hint);background:none;border:none;padding:0;white-space:nowrap}.admin-navitem{padding:5px 14px;font-size:13px;border-radius:20px;border:1px solid var(--border);background:transparent;color:var(--text-secondary);white-space:nowrap;flex-shrink:0;display:inline-flex;align-items:center;gap:6px}.admin-navitem__badge{min-width:17px;padding:0 5px;border-radius:9px;background:var(--accent);color:#fff;font-size:10px;font-weight:700;line-height:17px;text-align:center}.admin-navitem--active{border-color:var(--accent);background:var(--accent-light);color:var(--accent);font-weight:600}.admin-content{flex:1;min-width:0;padding:1rem 1rem 2rem}@media(min-width:900px){.admin-layout{flex-direction:row;align-items:stretch}.admin-rail{flex-direction:column;gap:2px;width:220px;flex-shrink:0;overflow-x:visible;border-bottom:none;border-right:1px solid var(--border);padding:1rem .75rem;background:var(--bg-subtle)}.admin-rail__brand{display:block;font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-hint);padding:0 10px 8px}.admin-navitem{border:none;border-radius:var(--radius-md);text-align:left;padding:8px 10px;color:var(--text-secondary);display:flex;justify-content:space-between}.admin-navitem:hover{background:var(--bg-hover)}.admin-navitem--active,.admin-navitem--active:hover{background:var(--accent-light);color:var(--accent)}.admin-rail__footer{flex-direction:column;align-items:stretch;gap:8px;margin-top:auto;margin-left:0;padding-top:12px;border-top:1px solid var(--border)}.admin-rail__user{max-width:none;text-align:center}.admin-rail__signout{width:100%;padding:8px;text-align:center;font-size:12px;font-weight:500;color:var(--text-secondary);border:1px solid var(--border);border-radius:var(--radius-md)}.admin-rail__signout:hover{background:var(--bg-hover)}.admin-content{padding:1.5rem 2rem;max-width:1100px}}input,textarea{font-family:var(--font-sans)}.orientation-guard{display:none}@media(orientation:landscape)and (max-width:899px)and (max-height:500px){.app-shell,.desktop-panel{display:none}.orientation-guard{display:flex;position:fixed;inset:0;z-index:300;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:2rem;text-align:center;background:var(--bg)}}.orientation-guard__thai{font-size:30px;color:var(--accent)}.orientation-guard__title{font-size:16px;font-weight:600;color:var(--text)}.orientation-guard__sub{font-size:13px;color:var(--text-secondary);max-width:280px}.lesson-frame{--chip-row: 64px;--action-bar-max: calc(127px + 1.8rem + env(safe-area-inset-bottom, 0px)) ;height:100%;display:flex;flex-direction:column;min-height:0;position:relative}.lesson-frame__head{flex-shrink:0;padding:1rem 1.25rem 0}.lesson-frame__body{flex:1;min-height:0;overflow-y:auto;overscroll-behavior-y:contain;display:flex;flex-direction:column;gap:20px;padding:1rem 1.25rem;padding-bottom:var(--action-bar-max)}.lesson-frame__actions{position:absolute;left:0;right:0;bottom:0;display:flex;flex-direction:column;overflow:hidden;transition:background-color .2s ease;padding:.9rem 1.25rem;padding-bottom:calc(.9rem + env(safe-area-inset-bottom,0px));background:var(--bg-subtle)}.lesson-frame__actions:empty{display:none}@media(max-width:899px){body.focus-mode{background:var(--bg-subtle)}}.lesson-step{flex:1 0 auto;display:flex;flex-direction:column;gap:12px}.lesson-step__title{font-size:19px;font-weight:700;line-height:1.3;color:var(--text);margin:0}.lesson-step>.lesson-step__title:first-child{margin-top:18.5px}.lesson-step__main{flex:1 0 auto;display:flex;flex-direction:column;gap:12px}.lesson-step__answers{margin-top:auto;margin-bottom:auto}.lesson-prompt{width:100%;padding:1rem 1.25rem;text-align:left}.lesson-step__group{display:flex;flex-direction:column;gap:10px}@media(max-width:899px){body.sheet-open{background:var(--bg-scrimmed)}body.focus-mode.sheet-open{background:var(--bg-subtle-scrimmed)}body.sheet-open header,body.sheet-open .focus-head__chrome{filter:brightness(.6)}body.focus-mode.sheet-open .lesson-frame__head,body.focus-mode.sheet-open .focus-head{background:var(--bg-subtle-scrimmed)}}.lesson-prompt__text{font-size:20px;font-weight:600;color:var(--text)}.chip-tray{display:flex;flex-wrap:wrap;align-content:flex-start;row-gap:0;column-gap:8px;min-height:calc(var(--chip-row) * 2);background-image:repeating-linear-gradient(to bottom,transparent 0,transparent calc(var(--chip-row) - 2px),var(--chip-tray-line, var(--line-strong)) calc(var(--chip-row) - 2px),var(--chip-tray-line, var(--line-strong)) var(--chip-row));background-size:100% calc(var(--chip-row) * 2);background-repeat:no-repeat;margin-top:auto}.chip-bank{margin-top:auto;margin-bottom:auto}.lesson-chip{height:calc(var(--chip-row) - 10px);margin-bottom:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;padding:0 14px;border:1.5px solid;border-bottom-width:4px;border-radius:20px;cursor:pointer}.lesson-frame__actions:has(.exercise-verdict--correct){background:var(--success-light);box-shadow:inset 0 2px 0 var(--success)}.lesson-frame__actions:has(.exercise-verdict--wrong){background:var(--danger-light);box-shadow:inset 0 2px 0 var(--danger)}@keyframes verdict-rise{0%{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.exercise-verdict{display:flex;flex-direction:column;gap:10px;animation:verdict-rise .34s cubic-bezier(.22,1,.36,1)}@media(prefers-reduced-motion:reduce){.exercise-verdict{animation:none}}.exercise-verdict__head{display:flex;align-items:center;justify-content:space-between;gap:8px;min-height:44px;margin-bottom:-6px}.exercise-verdict__title{font-size:16px;font-weight:700}.exercise-verdict--correct .exercise-verdict__title{color:var(--success)}.exercise-verdict--wrong .exercise-verdict__title{color:var(--danger)}.exercise-verdict__answer{font-size:14px;color:var(--text-secondary)}.exercise-verdict__flag{width:44px;height:44px;margin-right:-11px;flex-shrink:0;display:flex;align-items:center;justify-content:center;background:none;border:none;padding:0;cursor:pointer;color:var(--text-hint)}.exercise-verdict__continue{width:100%;padding:.85rem;font-size:14px;font-weight:600;color:#fff;border:none;border-radius:var(--radius-md);cursor:pointer}.exercise-verdict--correct .exercise-verdict__continue{background:var(--success)}.exercise-verdict--wrong .exercise-verdict__continue{background:var(--danger)}@keyframes sheet-rise{0%{transform:translate(-50%,100%)}to{transform:translate(-50%)}}@keyframes sheet-fall{0%{transform:translate(-50%)}to{transform:translate(-50%,100%)}}@keyframes backdrop-in{0%{opacity:0}to{opacity:1}}@keyframes backdrop-out{0%{opacity:1}to{opacity:0}}.sheet-panel{transform:translate(-50%);animation:sheet-rise .26s cubic-bezier(.22,1,.36,1)}.sheet-panel--closing{animation:sheet-fall .2s cubic-bezier(.4,0,1,1) forwards}.sheet-backdrop{background:#0006;animation:backdrop-in .2s ease-out}.sheet-backdrop--closing{animation:backdrop-out .2s ease-out forwards}@media(prefers-reduced-motion:reduce){.sheet-panel,.sheet-panel--closing,.sheet-backdrop,.sheet-backdrop--closing{animation:none}}