:root{--color-primary: #81739d;--color-primary-dark: #5A4FA3;--color-primary-light: #A99EDE;--color-primary-bg: #EDE9F8;--color-accent: #81739d;--color-accent-danger: #E05555;--color-accent-success: #4CAF82;--color-bg: #f6f4f1;--color-surface: #FFFFFF;--color-surface-alt: #e6e3df;--color-border: #E4E1EF;--color-border-light: #EDEBF5;--color-text-primary: #1C1B2E;--color-text-secondary: #6B6882;--color-text-muted: #909093;--color-text-inverse: #FFFFFF;--color-topbar-bg: #FFFFFF;--color-topbar-border: #E4E1EF;--color-sidebar-bg: #FFFFFF;--color-sidebar-active: #ECEAE4;--color-sidebar-hover: #F5F4F0;--color-bubble-user: #ECEAE4;--color-bubble-ai: #ECEAE4;--color-bubble-input: #ECEAE4;--color-chip-bg: var(--color-primary);--color-chip-text: #FFFFFF;--color-chip-hover: #5A4FA3;--color-voice-ring: var(--color-primary);--color-voice-bg-icon: var(--color-primary);--color-answer-bg: var(--color-primary);--color-answer-text: #FFFFFF;--color-answer-correct: #4CAF82;--color-answer-wrong: 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9999px;--shadow-sm: 0 1px 3px rgba(0,0,0,.06);--shadow-md: 0 4px 16px rgba(0,0,0,.08);--shadow-lg: 0 8px 32px rgba(0,0,0,.12);--shadow-sidebar: 4px 0 24px rgba(0,0,0,.07);--transition-fast: .12s ease;--transition-normal: .22s ease;--transition-slow: .36s cubic-bezier(.4, 0, .2, 1)}[data-theme=dark]{--color-bg: #111014;--color-surface: #1C1B2E;--color-surface-alt: #252438;--color-border: #2E2C45;--color-border-light: #35334F;--color-text-primary: #F0EDE8;--color-text-secondary: #9B98B8;--color-text-muted: #78768f;--color-text-inverse: #1C1B2E;--color-topbar-bg: #1C1B2E;--color-topbar-border: #2E2C45;--color-sidebar-bg: #1C1B2E;--color-sidebar-active: #252438;--color-sidebar-hover: #252438;--color-bubble-user: #252438;--color-bubble-ai: #252438;--color-bubble-input: #252438;--color-startscreen-bg: #111014;--color-startscreen-card: #1C1B2E;--color-startscreen-hero-bg: 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auto;width:100%}.chat-suggested__label{font-family:var(--font-display);font-size:var(--text-xs);font-weight:var(--weight-bold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:var(--color-text-secondary);text-align:center;margin-bottom:var(--space-1)}.chat-suggested__btn{background:var(--color-chip-bg);color:var(--color-chip-text);border:none;border-radius:var(--radius-full);padding:var(--space-3) var(--space-5);font-family:var(--font-display);font-size:var(--text-sm);font-weight:var(--weight-medium);text-align:center;cursor:pointer;transition:background var(--transition-fast),transform var(--transition-fast);width:100%}.chat-suggested__btn:hover{background:var(--color-chip-hover);transform:translateY(-1px)}.chat-input-wrap{padding:var(--space-3) var(--space-4) var(--space-5);flex-shrink:0}.chat-input{width:100%;max-width:var(--content-max-w);margin:0 auto;background:var(--color-bubble-input);border-radius:var(--radius-xl);padding:var(--space-4) var(--space-4);display:flex;flex-direction:column;gap:var(--space-3);position:relative;border-bottom:none}.chat-input:after{content:"";position:absolute;bottom:-10px;left:50%;transform:translate(-50%);width:0;height:0;border-style:solid;border-width:10px 10px 0 10px;border-color:var(--color-bubble-input) transparent transparent transparent}.chat-input__sender-label{font-family:var(--font-display);font-size:var(--text-xs);font-weight:var(--weight-bold);letter-spacing:var(--tracking-wide);color:var(--color-text-muted);text-transform:uppercase}.chat-input textarea{width:100%;resize:none;background:none;font-size:var(--text-base);color:var(--color-text-primary);line-height:1.5;min-height:44px;max-height:120px;overflow-y:auto}.chat-input textarea::placeholder{color:var(--color-text-muted)}.chat-input__actions{display:flex;align-items:center;justify-content:space-between}.chat-input__add-btn{width:32px;height:32px;border-radius:var(--radius-full);border:1.5px solid var(--color-border);background:none;color:var(--color-text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:border-color var(--transition-fast),color var(--transition-fast);font-size:13px}.chat-input__add-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.chat-input__mic-btn{width:40px;height:40px;border-radius:var(--radius-full);background:var(--color-text-primary);color:var(--color-bg);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:15px;transition:background var(--transition-fast),transform var(--transition-fast)}.chat-input__mic-btn:hover{background:var(--color-primary);transform:scale(1.05)}.chat-input__send-btn{width:40px;height:40px;border-radius:var(--radius-full);background:var(--color-primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:14px;transition:background var(--transition-fast),transform var(--transition-fast)}.chat-input__send-btn:hover{background:var(--color-primary-dark);transform:scale(1.05)}.chat-input__send-btn:disabled{opacity:.4;cursor:not-allowed;transform:none}@media (max-width: 600px){.chat-welcome{padding:var(--space-8) var(--space-4) var(--space-4)}.chat-welcome__avatar{width:52px;height:52px;font-size:22px}}.chat-input__mic-btn--active{background:var(--color-accent-danger)!important;animation:pulse-ring 1s ease-in-out infinite}.chat-mic-error{max-width:var(--content-max-w);margin:0 auto var(--space-2);width:calc(100% - var(--space-8));background:#e055551a;border:1px solid rgba(224,85,85,.3);color:var(--color-accent-danger);border-radius:var(--radius-md);padding:var(--space-2) var(--space-4);font-size:var(--text-sm);text-align:center;animation:fadeIn .2s ease both}.voice-screen{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - var(--topbar-height));padding:var(--space-8) var(--space-4);background:var(--color-bg);animation:fadeIn .3s ease both}.voice__image{height:70px}.voice-screen__header{text-align:center;margin-bottom:var(--space-10)}.voice-screen__title{font-family:var(--font-display);font-size:var(--text-xl);font-weight:var(--weight-bold);color:var(--color-text-primary);letter-spacing:var(--tracking-tight);margin-bottom:var(--space-2)}.voice-screen__subtitle{font-size:var(--text-base);color:var(--color-text-secondary);white-space:pre-line;line-height:1.5}.voice-ring-wrap{position:relative;display:flex;align-items:center;justify-content:center;width:160px;height:160px;margin-bottom:var(--space-6)}.voice-ring{position:absolute;top:0;left:0;width:100%;height:100%}.voice-ring__track{fill:none;stroke:var(--color-border);stroke-width:5}.voice-ring__progress{fill:none;stroke:var(--color-voice-ring);stroke-width:5;stroke-linecap:round;stroke-dasharray:440;stroke-dashoffset:0;transform-origin:center;transform:rotate(-90deg);transition:stroke-dashoffset .3s ease}.voice-ring--listening .voice-ring__progress{animation:spin 1.8s linear infinite;stroke-dashoffset:110;transition:stroke-dashoffset .35s ease}.voice-ring--speaking .voice-ring__progress{animation:pulse-ring 1s ease-in-out infinite}.voice-ring__icon{position:relative;width:100px;height:100px;border-radius:var(--radius-full);background:var(--color-voice-bg-icon);display:flex;align-items:center;justify-content:center;font-size:42px;color:#fff}.voice-status{background:var(--color-surface-alt);border:1px solid var(--color-border);border-radius:var(--radius-full);padding:var(--space-2) var(--space-8);font-family:var(--font-display);font-size:var(--text-sm);font-weight:var(--weight-bold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:var(--color-text-secondary);margin-bottom:var(--space-8)}.voice-transcript{max-width:460px;text-align:center;font-size:var(--text-base);color:var(--color-text-secondary);min-height:48px;margin-bottom:var(--space-6);line-height:1.5;font-style:italic}.voice-controls{display:flex;align-items:center;gap:var(--space-5)}.voice-btn{width:58px;height:58px;border-radius:var(--radius-full);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:20px;transition:transform var(--transition-fast),background var(--transition-fast)}.voice-btn:hover{transform:scale(1.06)}.voice-btn--mic{background:var(--color-surface);color:var(--color-text-primary);box-shadow:var(--shadow-md)}.voice-btn--mic.muted{background:var(--color-accent-danger);color:#fff}.voice-btn--hangup{background:var(--color-accent-danger);color:#fff;box-shadow:var(--shadow-md)}.voice-btn--start{background:var(--color-primary);color:#fff;width:70px;height:70px;font-size:24px;box-shadow:var(--shadow-lg)}.avatar-screen{display:flex;flex-direction:column;align-items:center;min-height:calc(100vh - var(--topbar-height));padding:var(--space-6) var(--space-4);background:var(--color-bg);animation:fadeIn .3s ease both}.avatar-screen__header{margin-top:var(--space-10);text-align:center;margin-bottom:var(--space-10)}.avatar-screen__title{font-family:var(--font-display);font-size:var(--text-xl);font-weight:var(--weight-bold);color:var(--color-text-primary);margin-bottom:var(--space-1)}.avatar-screen__subtitle{font-size:var(--text-base);color:var(--color-text-secondary)}.avatar-video-wrap{width:100%;max-width:700px;aspect-ratio:16 / 9;border-radius:var(--radius-xl);overflow:hidden;background:var(--color-startscreen-hero-bg);position:relative;box-shadow:var(--shadow-lg)}.avatar-video-wrap img,.avatar-video-wrap iframe,.avatar-video-wrap video{width:100%;height:100%;object-fit:cover;display:block;border:none}.avatar-timer{position:absolute;top:var(--space-3);left:var(--space-3);background:#00000073;color:#fff;border-radius:var(--radius-md);padding:var(--space-1) var(--space-3);font-family:var(--font-display);font-size:var(--text-xs);font-weight:var(--weight-medium);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.avatar-controls{position:absolute;bottom:var(--space-4);left:50%;transform:translate(-50%);display:flex;align-items:center;gap:var(--space-2)}.avatar-controls__left{position:absolute;bottom:var(--space-4);left:var(--space-4)}.avatar-controls__right{position:absolute;bottom:var(--space-4);right:var(--space-4);display:flex;gap:var(--space-2)}.avatar-btn{width:42px;height:42px;border-radius:var(--radius-full);border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;transition:transform var(--transition-fast),background var(--transition-fast);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.avatar-btn:hover{transform:scale(1.06)}.avatar-btn--default{background:var(--color-surface);color:var(--color-text-primary)}.avatar-btn--hangup{background:var(--color-accent-danger);color:#fff}.avatar-btn--active{background:var(--color-primary);color:var(--color-text-primary)}.avatar-btn--more{background:#ffffff80;color:#fff;font-size:12px;letter-spacing:2px}.trainer-screen{display:flex;flex-direction:column;min-height:calc(100vh - var(--topbar-height));background:var(--color-bg);animation:fadeIn .25s ease both}.trainer-messages{flex:1;overflow-y:auto;padding:var(--space-6) var(--space-4);display:flex;flex-direction:column;gap:var(--space-5)}.trainer-messages__inner{width:100%;max-width:var(--content-max-w);margin:0 auto}.trainer-counter{display:inline-flex;align-items:center;gap:var(--space-2);background:var(--color-primary-bg);color:var(--color-primary);border-radius:var(--radius-full);padding:var(--space-1) var(--space-3);font-family:var(--font-display);font-size:var(--text-xs);font-weight:var(--weight-bold);letter-spacing:var(--tracking-wide);margin-bottom:var(--space-4)}.trainer-question-bubble{background:var(--color-bubble-ai);border-radius:var(--radius-lg);padding:var(--space-4) var(--space-5);font-size:var(--text-base);color:var(--color-text-primary);line-height:1.6;position:relative;margin-bottom:var(--space-1)}.trainer-question-bubble:after{content:"";position:absolute;bottom:-8px;left:20px;width:0;height:0;border-style:solid;border-width:8px 8px 0 8px;border-color:var(--color-bubble-ai) transparent transparent transparent}.trainer-choose-label{text-align:center;font-family:var(--font-display);font-size:var(--text-xs);font-weight:var(--weight-bold);letter-spacing:var(--tracking-wider);text-transform:uppercase;color:var(--color-text-secondary);margin:var(--space-6) 0 var(--space-3)}.trainer-answers{display:flex;flex-direction:column;gap:var(--space-3);max-width:var(--content-max-w);margin:0 auto;width:100%;padding:0 var(--space-4) var(--space-8)}.trainer-answer-btn{width:100%;background:var(--color-answer-bg);color:var(--color-answer-text);border:none;border-radius:var(--radius-full);padding:var(--space-4) var(--space-6);font-family:var(--font-display);font-size:var(--text-sm);font-weight:var(--weight-medium);text-align:center;cursor:pointer;transition:background var(--transition-fast),transform var(--transition-fast)}.trainer-answer-btn:hover:not(:disabled){background:var(--color-primary-dark);transform:translateY(-1px)}.trainer-answer-btn--correct{background:var(--color-answer-correct)!important}.trainer-answer-btn--wrong{background:var(--color-answer-wrong)!important}.trainer-answer-btn:disabled{cursor:default}.trainer-input-wrap{padding:var(--space-3) var(--space-4) var(--space-6)}.trainer-result{display:flex;flex-direction:column;align-items:center;justify-content:center;flex:1;padding:var(--space-10) var(--space-4);text-align:center;animation:fadeIn .3s ease both}.trainer-result__icon{font-size:56px;color:var(--color-primary);margin-bottom:var(--space-4)}.trainer-result__score{font-family:var(--font-logo);font-size:var(--text-3xl);color:var(--color-text-primary);margin-bottom:var(--space-2)}.trainer-result__label{font-size:var(--text-base);color:var(--color-text-secondary);margin-bottom:var(--space-8)}.trainer-result__actions{display:flex;gap:var(--space-3);flex-wrap:wrap;justify-content:center}.leaderboard-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000059;z-index:60;display:flex;align-items:center;justify-content:center;padding:var(--space-4);animation:fadeIn .2s ease both}.leaderboard-modal{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--radius-xl);width:100%;max-width:520px;max-height:80vh;display:flex;flex-direction:column;box-shadow:var(--shadow-lg);overflow:hidden;animation:fadeIn .25s ease both}.leaderboard-modal__header{padding:var(--space-5) var(--space-6);border-bottom:1px solid var(--color-border);display:flex;align-items:center;justify-content:space-between;flex-shrink:0}.leaderboard-modal__title{display:flex;align-items:center;gap:var(--space-3);font-family:var(--font-display);font-size:var(--text-md);font-weight:var(--weight-bold);color:var(--color-text-primary)}.leaderboard-modal__title-icon{color:var(--color-leaderboard-gold);font-size:var(--text-lg)}.leaderboard-modal__close{color:var(--color-text-muted);font-size:var(--text-lg);transition:color var(--transition-fast)}.leaderboard-modal__close:hover{color:var(--color-text-primary)}.leaderboard-list{overflow-y:auto;flex:1;padding:var(--space-4)}.leaderboard-empty{text-align:center;padding:var(--space-10);color:var(--color-text-muted);font-size:var(--text-base)}.leaderboard-row{display:flex;align-items:center;gap:var(--space-4);padding:var(--space-3) var(--space-4);border-radius:var(--radius-md);transition:background var(--transition-fast);animation:fadeIn .2s ease both}.leaderboard-row:hover{background:var(--color-surface-alt)}.leaderboard-row__rank{width:32px;height:32px;border-radius:var(--radius-full);display:flex;align-items:center;justify-content:center;font-family:var(--font-display);font-size:var(--text-sm);font-weight:var(--weight-bold);flex-shrink:0;background:var(--color-surface-alt);color:var(--color-text-secondary)}.leaderboard-row__rank--gold{background:var(--color-leaderboard-gold);color:#5a4000}.leaderboard-row__rank--silver{background:var(--color-leaderboard-silver);color:#333}.leaderboard-row__rank--bronze{background:var(--color-leaderboard-bronze);color:#5a2e00}.leaderboard-row__info{flex:1;min-width:0}.leaderboard-row__name{font-family:var(--font-display);font-size:var(--text-base);font-weight:var(--weight-semi);color:var(--color-text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.leaderboard-row__topic{font-size:var(--text-xs);color:var(--color-text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.leaderboard-row__score{font-family:var(--font-display);font-size:var(--text-base);font-weight:var(--weight-bold);color:var(--color-primary);flex-shrink:0}.leaderboard-row__date{font-size:var(--text-xs);color:var(--color-text-muted);flex-shrink:0;white-space:nowrap}