:root{--bg-main:#f0f4f8;--bg-panel:#fff;--text:#1a202c;--text-soft:#718096;--primary:#3182ce;--primary-strong:#2c5aa0;--secondary:#ed8936;--accent:#48bb78;--accent-light:#c6f6d5;--line:#e2e8f0;--danger:#f56565;--shadow:0 4px 6px #00000012, 0 10px 20px #0000001a;--shadow-sm:0 1px 3px #0000001f}*{box-sizing:border-box}html,body,#root{min-height:100%}body{color:var(--text);background-image:url(/assets/48background-C_xnPhzs.png);background-position:50%;background-repeat:no-repeat;background-size:cover;background-attachment:fixed;margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,sans-serif;font-size:16px;line-height:1.5}body:before{content:"";pointer-events:none;background:#f0f4f86b;position:fixed;inset:0}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}h1{font-size:2.5rem;font-weight:700;line-height:1.1}h2{font-size:1.875rem;font-weight:700;line-height:1.2}h3{font-size:1.25rem;font-weight:700}#root{z-index:1;min-height:100vh;position:relative}.btn{cursor:pointer;background:var(--bg-panel);border:none;border:1px solid var(--line);color:var(--text);box-shadow:var(--shadow-sm);border-radius:8px;padding:12px 20px;font-size:.95rem;font-weight:600;transition:all .3s cubic-bezier(.2,.8,.2,1)}.btn:hover{box-shadow:var(--shadow);border-color:var(--primary);transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn-primary{background:linear-gradient(135deg, var(--primary), #2b5eb9);color:#fff;border:none;box-shadow:0 4px 15px #3182ce4d}.btn-primary:hover{background:linear-gradient(135deg, var(--primary-strong), #1e4e8a);box-shadow:0 8px 25px #3182ce66}.btn-secondary{color:#fff;background:#fff3;border:1px solid #ffffff4d;font-weight:600}.btn-secondary:hover{background:#ffffff4d;border-color:#ffffff80}.login-page{place-items:center;min-height:100vh;padding:24px;display:grid;position:relative}.login-page:before{content:"";z-index:0;background:#00000059;position:absolute;inset:0}.login-page>*{z-index:1;position:relative}.login-card{background:var(--bg-panel);width:min(480px,100%);box-shadow:var(--shadow);border:1px solid #136f6329;border-radius:22px;padding:28px;animation:.6s rise-in}.login-brand{text-align:center;color:#0f4da2;letter-spacing:.03em;margin-bottom:12px;font-size:1.35rem;font-weight:800;display:block}.login-card h1{margin-bottom:8px;font-size:1.65rem}.login-subtitle{color:var(--text-soft);margin-bottom:22px}.login-form{gap:10px;display:grid}.login-form label{color:var(--text-soft);font-size:.9rem}.login-form input{border:1px solid var(--line);background:var(--bg-main);border-radius:10px;min-height:44px;padding:12px 14px;font-size:.95rem;transition:all .2s}.login-form input:focus{border-color:var(--primary);background:#fff;outline:none;box-shadow:0 0 0 3px #3182ce1a}.error-message{color:var(--danger);margin-top:-8px;font-size:.9rem}.register-help{color:var(--text-soft);margin-top:-4px;font-size:.9rem;line-height:1.45}.register-help a{color:var(--primary-strong);font-weight:700;text-decoration:underline}.app-shell{max-width:1400px;margin:0 auto;padding:24px 20px 40px}.drive-notice-overlay{z-index:30;background:#0f172a99;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.drive-notice-card{background:#fff;border:1px solid #3182ce2e;border-radius:18px;gap:12px;width:min(620px,100%);padding:24px;display:grid;box-shadow:0 20px 44px #0f172a47}.drive-notice-card h2{color:var(--primary-strong);font-size:1.35rem}.drive-notice-card p{color:var(--text);line-height:1.6}.drive-notice-steps{color:var(--text);gap:4px;margin:0;padding-left:18px;line-height:1.7;display:grid}.drive-notice-steps a{color:var(--primary-strong);font-weight:700;text-decoration:underline}.drive-notice-reminder{color:#b45309;font-weight:700}.drive-notice-card .btn{justify-self:flex-start}.course-header{background:linear-gradient(135deg, var(--primary), #2b5aa0);border:none;border-radius:16px;justify-content:space-between;align-items:center;gap:16px;margin-bottom:32px;padding:20px 24px;display:flex;box-shadow:0 10px 30px #3182ce26}.course-header>div{color:#fff}.header-brand{color:#fffc;text-transform:uppercase;letter-spacing:1px;margin-bottom:4px;font-size:.75rem;font-weight:700}.header-name{color:#fff;font-size:1.25rem;font-weight:700}.course-header .btn{color:#fff;background:#fff3;border:1px solid #ffffff4d}.course-header .btn:hover{background:#ffffff4d;border-color:#ffffff80;box-shadow:0 4px 15px #0000001a}.content-shell{box-shadow:var(--shadow-sm);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);background:#ffffffe6;border:none;border-radius:16px;padding:28px}.progress-wrap{background:linear-gradient(135deg,#3182ce0d,#48bb780d);border:1px solid #3182ce1a;border-radius:12px;margin-bottom:40px;padding:24px}.progress-title-row{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:16px;display:flex}.progress-title-row h2{color:var(--primary);margin:0}.progress-title-row p{color:var(--text-soft);font-weight:600}.progress-track{background:var(--line);border-radius:999px;width:100%;height:12px;position:relative;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--primary), var(--accent));height:100%;transition:width .5s cubic-bezier(.2,.8,.2,1);box-shadow:0 0 20px #3182ce4d}.progress-percent{color:var(--primary);margin-top:12px;font-size:.95rem;font-weight:700}.day-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:16px;display:grid}.day-card{border:2px solid var(--line);background:var(--bg-panel);min-height:160px;box-shadow:var(--shadow-sm);border-radius:12px;flex-direction:column;justify-content:space-between;padding:16px;transition:all .3s cubic-bezier(.2,.8,.2,1);display:flex;position:relative;overflow:hidden}.day-card:before{content:"";background:linear-gradient(90deg, var(--primary), var(--secondary));opacity:0;height:4px;transition:opacity .3s;position:absolute;top:0;left:0;right:0}.day-card:hover{border-color:var(--primary);transform:translateY(-4px);box-shadow:0 12px 24px #3182ce26}.day-card:hover:before{opacity:1}.day-number{color:var(--text-soft);text-transform:uppercase;letter-spacing:.5px;margin-bottom:4px;font-size:.8rem;font-weight:700}.day-card h3{margin:8px 0;font-size:1rem;line-height:1.3}.status-badge{text-transform:uppercase;letter-spacing:.5px;border-radius:20px;align-self:flex-start;margin-top:auto;padding:6px 12px;font-size:.75rem;font-weight:700}.status-not_started{color:var(--text-soft);background:#0000000d}.status-in_progress{color:#c05621;background:#ed893626}.status-completed{color:#22863a;background:#48bb7826}.panel{gap:16px;display:grid}.back-link{color:var(--primary);align-items:center;gap:8px;font-weight:700;transition:all .2s;display:inline-flex}.back-link:hover{transform:translate(-4px)}.tabs{border-bottom:2px solid var(--line);flex-wrap:wrap;gap:8px;margin-bottom:16px;padding-bottom:12px;display:flex}.tab-btn{cursor:pointer;color:var(--text-soft);background:0 0;border:none;border-radius:8px;padding:10px 14px;font-weight:600;transition:all .2s;position:relative}.tab-btn:hover{color:var(--primary);background:#3182ce0d}.tab-btn.active{color:var(--primary);background:#3182ce1a}.tab-btn.active:after{content:"";background:var(--primary);height:2px;position:absolute;bottom:-14px;left:0;right:0}.tab-content{border-top:1px solid var(--line);padding-top:16px}.resource-frame{gap:10px;display:grid}.resource-title{color:var(--text);font-weight:700}.resource-iframe{width:100%;height:78vh;min-height:78vh;box-shadow:var(--shadow-sm);background:#fff;border:0;border-radius:14px;overflow:hidden}.embed-16by9{width:100%;padding-top:56.25%;position:relative}.embed-16by9 .resource-iframe{width:100%;height:100%;min-height:0;position:absolute;inset:0}.empty-state{color:var(--text-soft);text-align:center;padding:40px 20px}.vocab-module{gap:18px;display:grid}.vocab-card-wrap,.quiz-wrap,.learned-wrap{border:1px solid var(--line);box-shadow:var(--shadow-sm);background:#fff;border-radius:14px;gap:12px;padding:16px;display:grid}.vocab-card-wrap h3,.quiz-wrap h3{color:var(--primary)}.flashcard-wrap{perspective:1200px}.flip-card{cursor:pointer;border-radius:20px;outline:none;width:100%;min-height:260px}.flip-card-inner{text-align:center;width:100%;height:100%;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.2,.8,.2,1);position:relative;box-shadow:0 14px 26px #0f172a26}.flip-card.is-flipped .flip-card-inner{transform:rotateY(180deg)}.flip-card-front,.flip-card-back{backface-visibility:hidden;border:1px solid #d9e2ef;border-radius:20px;flex-direction:column;justify-content:space-between;align-items:stretch;gap:12px;width:100%;height:100%;padding:18px 20px;display:flex;position:absolute}.flip-card-front{background:#fff}.flip-card-back{background:#f9fbff;transform:rotateY(180deg)}.flashcard-topline{justify-content:space-between;align-items:center;gap:12px;width:100%;display:flex}.flashcard-tag,.flashcard-back-badge{letter-spacing:.08em;text-transform:uppercase;color:#1d4ed8;background:#e8f0ff;border-radius:999px;justify-content:center;align-items:center;padding:5px 11px;font-size:.72rem;font-weight:700;display:inline-flex}.flashcard-listen,.flashcard-replay{cursor:pointer;color:#1e3a8a;background:#fff;border:1px solid #cddbf5;border-radius:999px;padding:8px 13px;font-size:.9rem;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s;box-shadow:0 2px 7px #1e40af1a}.flashcard-listen:hover,.flashcard-replay:hover{background:#eef4ff;box-shadow:0 6px 16px #1e40af33}.flashcard-main{align-content:center;justify-items:center;gap:10px;min-height:130px;display:grid}.flashcard-word{letter-spacing:-.01em;color:#0f172a;text-align:center;font-size:clamp(1.8rem,3vw,2.3rem);font-weight:800}.flashcard-pron{color:var(--text-soft);background:#f2f6ff;border:1px solid #d6e3ff;border-radius:999px;padding:6px 12px;font-family:SFMono-Regular,Consolas,Liberation Mono,monospace;font-size:.98rem}.flashcard-pron-empty{color:#64748b;font-family:inherit}.flashcard-hint{color:#64748b;text-align:center;font-size:.88rem}.flashcard-back-content{align-content:center;justify-items:center;gap:8px;min-height:130px;display:grid}.flashcard-meaning{color:#0f172a;text-align:center;font-size:clamp(1.35rem,2.5vw,1.8rem);font-weight:700}.flashcard-example-label{letter-spacing:.06em;text-transform:uppercase;color:#64748b;font-size:.75rem;font-weight:700}.flashcard-example{color:#334155;text-align:center;max-width:40rem;font-size:.95rem;line-height:1.6}.flashcard-example-meaning{color:#0f766e;text-align:center;background:#ecfeff;border:1px solid #bae6fd;border-radius:10px;max-width:40rem;padding:6px 10px;font-size:.92rem;line-height:1.55}.flashcard-info-grid{color:#334155;background:#f8fbff;border:1px solid #dbe5f4;border-radius:12px;gap:6px;margin-top:4px;padding:12px 14px;font-size:.95rem;display:grid}.flashcard-info-grid strong{color:#1e3a8a}.flashcard-meta{color:var(--text-soft);margin-top:8px;font-size:.85rem}.quiz-options{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:8px;display:grid}.option-btn{border:1px solid var(--line);cursor:pointer;color:var(--text);background:#fff;border-radius:8px;padding:10px 12px;font-weight:600;transition:transform .18s,box-shadow .18s}.option-btn:hover{transform:translateY(-3px);box-shadow:0 8px 18px #0000000f}.option-btn.selected{border-color:var(--primary);background:#eafdf7}.option-btn.correct{border-color:var(--accent);color:#166534;background:#48bb7829}.option-btn.wrong{border-color:var(--danger);color:#b91c1c;background:#f565651f}.feedback-text{color:var(--accent);margin-top:8px;font-weight:600}.match-grid{grid-template-columns:1fr 1fr;gap:12px;display:grid}.match-col{gap:8px;display:grid}.match-item{border:1px dashed var(--line);text-align:left;cursor:pointer;background:#fff;border-radius:8px;padding:12px;font-weight:600;transition:all .2s}.match-item.selected{outline:2px solid #3182ce4d;transform:translateY(-2px)}.match-item.matched{border-style:solid;border-color:var(--accent);background:#eafdf7}.match-item.wrong{border-style:solid;border-color:var(--danger);color:#b91c1c;background:#f565651f;animation:.28s shake}.match-item .muted{color:var(--text-soft);font-size:.8rem}.match-feedback{margin-top:10px;font-weight:700}.match-feedback-error{color:var(--danger)}.module-complete-wrap{text-align:center;background:linear-gradient(135deg,#48bb7814,#3182ce14);border:1px solid #48bb7838;border-radius:14px;gap:10px;margin-top:14px;padding:14px;display:grid}.module-complete-text{color:var(--accent);font-weight:700}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-3px)}50%{transform:translate(3px)}75%{transform:translate(-2px)}}.learned-wrap{background:linear-gradient(135deg,#48bb780d,#48bb7805);border-color:#48bb7833}.learned-wrap button{width:100%}.learned-wrap p{color:var(--accent);text-align:center;margin-top:8px}@keyframes rise-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (width<=768px){.resource-iframe{height:60vh;min-height:60vh}.content-shell{padding:14px}h1{font-size:1.875rem}.day-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}.match-grid{grid-template-columns:1fr}.flashcard-topline{flex-direction:column;align-items:stretch}.flashcard-listen,.flashcard-replay{width:100%}}