:root{--bdc:#3558e6;--bdc2:#6d4df4;--ink:#14213d;--muted:#667085;--line:#e5e9f2;--soft:#f6f8ff;--good:#0b8f55;--warn:#b76e00}
.bdc-dashboard,.bdc-lesson{max-width:1120px;margin:0 auto;color:var(--ink);font-family:inherit}.bdc-dashboard *,.bdc-lesson *{box-sizing:border-box}.bdc-hero{padding:56px 34px;border-radius:28px;background:linear-gradient(135deg,#eef2ff,#f8f6ff);border:1px solid #dfe5ff;margin:24px 0}.bdc-hero h1{font-size:clamp(36px,6vw,64px);line-height:1.02;margin:10px 0 18px}.bdc-hero p{font-size:18px;max-width:850px;color:#475467}.bdc-eyebrow{display:inline-block;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:.12em;color:var(--bdc)}.bdc-hero-meta,.bdc-placement-points{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.bdc-hero-meta span,.bdc-placement-points span{padding:8px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:13px;font-weight:700}.bdc-placement{margin:28px 0;padding:34px;border:1px solid #dfe5ff;background:#fff;border-radius:24px;box-shadow:0 12px 40px rgba(28,44,105,.07)}.bdc-placement h2,.bdc-recommendation h2,.bdc-path-head h2{font-size:32px;margin:8px 0 10px}.bdc-placement p,.bdc-recommendation p,.bdc-path-head p{color:var(--muted)}.bdc-primary,.bdc-secondary,.bdc-level-start,.bdc-check,.bdc-complete,.bdc-copy-ai{display:inline-flex;align-items:center;justify-content:center;border:0;border-radius:12px;padding:12px 18px;font-weight:800;cursor:pointer;text-decoration:none}.bdc-primary,.bdc-level-start,.bdc-check,.bdc-complete{background:var(--bdc);color:#fff!important}.bdc-secondary,.bdc-copy-ai{background:#fff;color:var(--ink);border:1px solid var(--line)}.bdc-primary:hover,.bdc-level-start:hover{filter:brightness(.96)}.bdc-test-form{margin-top:28px}.bdc-test-q{border:0;border-top:1px solid var(--line);padding:24px 0;margin:0}.bdc-test-q legend{font-weight:800;font-size:17px;display:flex;gap:10px}.bdc-test-q legend span{display:inline-grid;place-items:center;min-width:28px;height:28px;border-radius:50%;background:var(--soft);color:var(--bdc)}.bdc-test-q label{display:block;padding:10px 12px;margin:8px 0;border:1px solid var(--line);border-radius:12px;cursor:pointer}.bdc-test-q label:has(input:checked){border-color:var(--bdc);background:#f2f5ff}.bdc-test-actions{padding-top:20px}.bdc-test-actions p{color:#b42318;font-weight:700}.bdc-test-result{margin-top:24px;padding:24px;border-radius:18px;background:#eefbf5;border:1px solid #b7ecd0}.bdc-recommendation{display:flex;justify-content:space-between;gap:20px;align-items:center;padding:26px 28px;border-radius:20px;background:linear-gradient(135deg,#edf2ff,#f6f2ff);border:1px solid #dce3ff;margin:26px 0}.bdc-progress-wrap{padding:20px 24px;border-radius:18px;background:#fff;border:1px solid var(--line);margin:24px 0}.bdc-progress-wrap>div:first-child{display:flex;justify-content:space-between;gap:12px}.bdc-progress{height:10px;background:#edf0f6;border-radius:999px;margin-top:12px;overflow:hidden}.bdc-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--bdc),var(--bdc2));transition:.3s}.bdc-path-head{display:flex;justify-content:space-between;gap:20px;align-items:end;margin:48px 0 20px}.bdc-levels{display:grid;grid-template-columns:1fr;gap:22px}.bdc-level-card{position:relative;border:1px solid var(--line);border-radius:24px;padding:28px;background:#fff;scroll-margin-top:24px}.bdc-level-card.is-recommended{border:2px solid var(--bdc);box-shadow:0 14px 50px rgba(53,88,230,.12)}.bdc-level-card.is-review{opacity:.76}.bdc-path-tag{position:absolute;right:20px;top:18px;font-size:12px;font-weight:800;color:var(--bdc)}.bdc-level-top{display:flex;gap:12px;align-items:center}.bdc-level-number{font-size:12px;font-weight:900;letter-spacing:.11em;color:var(--bdc)}.bdc-level-badge{font-size:12px;padding:5px 9px;border-radius:999px;background:var(--soft);font-weight:700}.bdc-level-card h2{font-size:28px;margin:12px 0 8px}.bdc-focus{color:#344054}.bdc-level-progress{margin:18px 0}.bdc-level-progress>span{font-size:12px;font-weight:800;color:var(--muted)}.bdc-level-progress>div{height:7px;background:#edf0f6;border-radius:999px;overflow:hidden;margin-top:7px}.bdc-level-progress i{display:block;height:100%;width:0;background:var(--good)}.bdc-lesson-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin:18px 0}.bdc-lesson-link{display:grid;grid-template-columns:36px 1fr 24px;gap:10px;align-items:center;padding:12px;border:1px solid var(--line);border-radius:14px;color:var(--ink)!important;text-decoration:none}.bdc-lesson-link:hover{border-color:#b8c4ff;background:#fbfcff}.bdc-lesson-link.is-done{background:#f2fbf6;border-color:#bce7cf}.bdc-num{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--soft);font-weight:900;color:var(--bdc)}.bdc-lesson-link small{display:block;color:var(--muted);font-size:12px;margin-top:3px}.bdc-status{font-weight:900;color:var(--good)}.bdc-level-start{margin-top:4px}.bdc-topnav,.bdc-bottomnav{max-width:1120px;margin:20px auto;display:flex;justify-content:space-between;gap:15px;padding:14px 18px;background:#fff;border:1px solid var(--line);border-radius:14px}.bdc-topnav a,.bdc-bottomnav a{font-weight:800;color:var(--bdc);text-decoration:none}.bdc-lesson{padding:12px 0 40px}.bdc-kicker{font-size:13px;font-weight:900;color:var(--bdc);text-transform:uppercase;letter-spacing:.08em}.bdc-callout,.bdc-takeaway{padding:20px;border-radius:16px;background:var(--soft);border-left:4px solid var(--bdc);margin:20px 0}.bdc-phrases li{margin:8px 0}.bdc-phrases code{white-space:normal;font-size:15px}.bdc-dialog{padding:18px;border:1px solid var(--line);border-radius:16px;background:#fff}.bdc-compare{display:grid;grid-template-columns:1fr 1fr;gap:14px}.bdc-compare>div{padding:18px;border:1px solid var(--line);border-radius:14px}.bdc-practice{width:100%;min-height:140px;padding:14px;border:1px solid var(--line);border-radius:14px}.bdc-quiz{padding:20px;border:1px solid var(--line);border-radius:16px;background:#fff}.bdc-quiz label{display:block;margin:10px 0}.bdc-result{margin-top:12px;font-weight:800}.bdc-result.is-correct{color:var(--good)}.bdc-result.is-wrong{color:#b42318}.bdc-result.is-warn{color:var(--warn)}.bdc-ai-prompt{display:flex;gap:12px;align-items:flex-start;padding:16px;background:#101828;color:#fff;border-radius:14px}.bdc-ai-prompt code{flex:1;color:#fff;white-space:normal}.bdc-complete.is-done{background:var(--good)}
@media(max-width:760px){.bdc-hero,.bdc-placement,.bdc-level-card{padding:22px}.bdc-recommendation,.bdc-path-head{display:block}.bdc-recommendation .bdc-primary,.bdc-path-head .bdc-secondary{margin-top:14px}.bdc-lesson-list{grid-template-columns:1fr}.bdc-compare{grid-template-columns:1fr}.bdc-ai-prompt{display:block}.bdc-copy-ai{margin-top:12px}.bdc-progress-wrap>div:first-child{display:block}.bdc-path-tag{position:static;margin-bottom:8px}.bdc-hero h1{font-size:38px}}

/* V2.1 Growth Path + Checkpoint Exams */
.bdc-growth-route{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin:18px 0}.bdc-growth-route span{padding:10px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);font-weight:800}.bdc-growth-route span:last-child{background:#eef2ff;border-color:#bec9ff;color:var(--bdc)}
.bdc-rec-copy{flex:1}.bdc-bridge{margin-top:15px;padding:16px 18px;border-radius:15px;background:#fff;border:1px solid #dfe5ff}.bdc-bridge ul{margin:9px 0 0 20px;color:#475467}.bdc-bridge li{margin:5px 0}.bdc-level-card.is-current{border-color:#8fd5b0;box-shadow:0 10px 30px rgba(11,143,85,.08)}.bdc-level-card.is-current:not(.is-recommended) .bdc-path-tag{color:var(--good)}
.bdc-exam{grid-column:1/-1;border:1px solid #d7defa;border-radius:16px;background:linear-gradient(135deg,#fbfcff,#f7f4ff);overflow:hidden;margin:4px 0 10px}.bdc-exam summary{display:grid;grid-template-columns:40px 1fr auto;gap:10px;align-items:center;padding:15px 16px;cursor:pointer;list-style:none}.bdc-exam summary::-webkit-details-marker{display:none}.bdc-exam summary small{display:block;color:var(--muted);margin-top:2px}.bdc-exam-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:#fff;border:1px solid var(--line)}.bdc-exam-score{font-size:12px;font-weight:900;padding:7px 9px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--bdc)}.bdc-exam-form{padding:0 18px 18px}.bdc-exam-intro{padding:14px 16px;border-radius:12px;background:#fff;border:1px solid var(--line);margin-bottom:12px}.bdc-exam-intro p{margin:4px 0 0;color:var(--muted)}.bdc-exam-q{border:0;border-top:1px solid var(--line);padding:15px 0;margin:0}.bdc-exam-q legend{font-weight:800;display:flex;gap:8px}.bdc-exam-q legend span{display:inline-grid;place-items:center;min-width:24px;height:24px;border-radius:50%;background:#eef2ff;color:var(--bdc);font-size:12px}.bdc-exam-q label{display:block;padding:8px 10px;margin:6px 0;border-radius:10px;border:1px solid transparent}.bdc-exam-q label:has(input:checked){background:#fff;border-color:#bec9ff}.bdc-exam-result{margin-top:14px;padding:14px 16px;border-radius:12px;background:#fff;border:1px solid var(--line)}.bdc-exam-result.is-correct{border-color:#bce7cf;background:#f2fbf6}.bdc-exam-result.is-warn{border-color:#f2d6a2;background:#fffaf0}.bdc-score-big{font-size:28px;font-weight:900;color:var(--bdc);margin-bottom:4px}.bdc-stretch-banner{padding:18px 20px;border-radius:16px;background:linear-gradient(135deg,#eef2ff,#f7f3ff);border:1px solid #dbe2ff;margin:14px 0 24px}.bdc-stretch-banner p{margin:6px 0 0;color:#475467}
@media(max-width:760px){.bdc-exam summary{grid-template-columns:36px 1fr}.bdc-exam-score{grid-column:2}.bdc-growth-route b{display:none}.bdc-recommendation{gap:14px}.bdc-bridge ul{padding-left:3px}}


/* V2.2 — listen/pronunciation audio */
.bdc-audio-tools{display:flex;align-items:center;justify-content:space-between;gap:14px;margin:14px auto 22px;padding:12px 14px;border:1px solid #dfe5ff;border-radius:14px;background:linear-gradient(135deg,#f7f9ff,#fff);box-shadow:0 7px 24px rgba(30,50,120,.06)}
.bdc-audio-tools>div{display:flex;align-items:center;gap:10px;flex-wrap:wrap}.bdc-audio-tools strong{color:var(--ink)}.bdc-audio-tools span{font-size:13px;color:var(--muted)}.bdc-audio-tools label{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:800;color:var(--muted);margin-left:auto}.bdc-audio-tools select{padding:7px 9px;border:1px solid var(--line);border-radius:9px;background:#fff;color:var(--ink)}.bdc-audio-stop{border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:800;border-radius:9px;padding:7px 10px;cursor:pointer}
.bdc-audio-btn{display:inline-flex!important;align-items:center!important;gap:5px!important;margin-left:9px!important;padding:5px 8px!important;min-height:30px!important;border:1px solid #cbd5ff!important;border-radius:999px!important;background:#f5f7ff!important;color:#2f52d7!important;font-size:11px!important;font-weight:800!important;line-height:1!important;cursor:pointer!important;vertical-align:middle!important;box-shadow:none!important;white-space:nowrap!important}
.bdc-audio-btn:hover{background:#eaf0ff!important;border-color:#9cadf7!important}.bdc-audio-btn.is-speaking{background:#3558e6!important;color:#fff!important;border-color:#3558e6!important}.bdc-audio-btn.is-speaking .bdc-audio-label{font-size:0}.bdc-audio-btn.is-speaking .bdc-audio-label:after{content:'Playing';font-size:11px}
.bdc-test-q legend,.bdc-exam-q legend{align-items:center;flex-wrap:wrap}.bdc-test-q label,.bdc-exam-q label,.bdc-quiz label{position:relative;padding-right:88px}.bdc-test-q label>.bdc-audio-btn,.bdc-exam-q label>.bdc-audio-btn,.bdc-quiz label>.bdc-audio-btn{position:absolute;right:8px;top:50%;transform:translateY(-50%);margin-left:0!important}.bdc-quiz>p{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.bdc-phrases li,.bdc-dialog p,.bdc-compare p,.bdc-takeaway p{position:relative}.bdc-phrases li>.bdc-audio-btn,.bdc-dialog p>.bdc-audio-btn,.bdc-compare p>.bdc-audio-btn,.bdc-takeaway p>.bdc-audio-btn{margin-left:10px!important}
@media(max-width:760px){.bdc-audio-tools{align-items:flex-start;flex-wrap:wrap}.bdc-audio-tools label{margin-left:0}.bdc-audio-label{display:none}.bdc-audio-btn{padding:6px 8px!important}.bdc-test-q label,.bdc-exam-q label,.bdc-quiz label{padding-right:48px}}

/* V2.3 student account + secure course-history UI */
.bdc-account-panel{display:flex;gap:20px;align-items:center;padding:22px;margin:22px 0;border:1px solid #dbe7ff;border-radius:20px;background:linear-gradient(135deg,#f8fbff,#fff);box-shadow:0 10px 28px rgba(24,54,105,.06)}
.bdc-account-panel.is-logged-in{border-color:#ccebd8;background:linear-gradient(135deg,#f5fff9,#fff)}
.bdc-account-icon{width:54px;height:54px;display:grid;place-items:center;border-radius:16px;background:#eef4ff;font-size:27px;flex:0 0 auto}
.bdc-account-copy{flex:1}.bdc-account-copy h3{margin:4px 0 7px;font-size:22px}.bdc-account-copy p{margin:0;color:#526072;line-height:1.6}
.bdc-account-stats{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.bdc-account-stats span{padding:6px 10px;border-radius:999px;background:#edf3ff;font-size:12px;font-weight:700;color:#294a81}
.bdc-account-actions{display:flex;gap:9px;align-items:center;flex-wrap:wrap;justify-content:flex-end}.bdc-account-link,.bdc-forgot{font-size:13px;font-weight:700;text-decoration:none}.bdc-account-link:hover,.bdc-forgot:hover{text-decoration:underline}
.bdc-account-modal[hidden]{display:none!important}.bdc-account-modal{position:fixed;inset:0;z-index:999999;background:rgba(15,23,42,.56);display:grid;place-items:center;padding:20px;backdrop-filter:blur(5px)}
.bdc-account-dialog{width:min(470px,100%);background:#fff;border-radius:22px;padding:24px;position:relative;box-shadow:0 28px 80px rgba(15,23,42,.25)}
.bdc-account-close{position:absolute;top:12px;right:14px;border:0;background:transparent;font-size:28px;line-height:1;cursor:pointer;color:#667085}
.bdc-account-tabs{display:grid;grid-template-columns:1fr 1fr;background:#f1f5f9;border-radius:12px;padding:4px;margin:14px 34px 20px 0}.bdc-account-tabs button{border:0;background:transparent;padding:10px;border-radius:9px;font-weight:800;cursor:pointer}.bdc-account-tabs button.is-active{background:#fff;box-shadow:0 2px 10px rgba(15,23,42,.08)}
.bdc-account-form h3{margin:2px 0 16px;font-size:22px}.bdc-account-form label:not(.bdc-checkline){display:block;font-size:13px;font-weight:800;margin:12px 0}.bdc-account-form input[type=text],.bdc-account-form input[type=email],.bdc-account-form input[type=password]{width:100%;box-sizing:border-box;margin-top:6px;border:1px solid #cfd8e6;border-radius:10px;padding:12px 13px;font:inherit;outline:none}.bdc-account-form input:focus{border-color:#5577ee;box-shadow:0 0 0 3px rgba(85,119,238,.12)}
.bdc-account-form small{display:block;color:#667085;margin-top:-4px;margin-bottom:12px}.bdc-checkline{display:flex;align-items:center;gap:8px;margin:12px 0;font-size:13px}.bdc-account-form .bdc-primary{width:100%;margin-top:4px}.bdc-account-message{min-height:20px;margin:10px 0 6px;font-size:13px;font-weight:700}.bdc-account-message.is-error{color:#b42318}.bdc-account-message.is-success{color:#027a48}.bdc-modal-open{overflow:hidden}
@media(max-width:760px){.bdc-account-panel{align-items:flex-start;flex-wrap:wrap}.bdc-account-copy{min-width:calc(100% - 80px)}.bdc-account-actions{width:100%;justify-content:flex-start}.bdc-account-actions .bdc-primary,.bdc-account-actions .bdc-secondary{flex:1}.bdc-account-dialog{padding:20px}}
/* V2.4 password recovery */
.bdc-link-button{background:none;border:0;padding:0;margin-top:8px;color:#2563eb;text-decoration:underline;cursor:pointer;font:inherit}
.bdc-form-help{margin:0 0 14px;color:#4b5563;line-height:1.6}
#bdc-forgot-step-code[hidden],#bdc-forgot-step-email[hidden]{display:none!important}
.bdc-account-tabs{display:flex;flex-wrap:wrap;gap:6px}
.bdc-account-tabs button{flex:1 1 auto}