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ease}.next-steps-btn:hover{border-color:var(--accent);background:var(--accent-soft);color:var(--accent);transform:translateY(-1px)}.next-steps-btn.primary{background:var(--text);color:var(--bg);border-color:var(--text)}.next-steps-btn.primary:hover{border-color:var(--accent);background:var(--accent);color:#fff}.next-steps-icon{font-size:16px}.lecture-chat{display:flex;flex-direction:column;gap:16px;padding:24px}.lecture-chat-header{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;padding-bottom:16px;border-bottom:1px solid var(--rule)}.lecture-chat-scroll{min-height:220px;max-height:520px;overflow-y:auto;padding:4px 2px;display:flex;flex-direction:column}.lecture-chat-empty{padding:24px 4px}.lecture-chat-suggestion{text-align:left;padding:12px 14px;border:1px solid var(--rule);border-radius:12px;background:var(--bg-elevated);color:var(--text);font-size:14px;cursor:pointer;transition:border-color .15s ease,background .15s ease}.lecture-chat-suggestion:hover:not(:disabled){border-color:var(--accent);background:var(--accent-soft)}.lecture-chat-suggestion:disabled{opacity:.5;cursor:not-allowed}.lecture-chat-bubble{max-width:88%;padding:12px 16px;border-radius:16px;font-size:14px;line-height:1.55;white-space:pre-wrap;word-break:break-word}.lecture-chat-bubble.from-user{align-self:flex-end;background:var(--text);color:var(--bg);border-bottom-right-radius:4px}.lecture-chat-bubble.from-assistant{align-self:flex-start;background:var(--accent-soft);color:var(--text);border-bottom-left-radius:4px}.lecture-chat-streaming{position:relative}.lecture-chat-caret{display:inline-block;width:7px;height:14px;background:var(--accent);border-radius:2px;margin-left:3px;vertical-align:text-bottom;animation:chat-caret-blink 1s steps(2,start) infinite}@keyframes chat-caret-blink{to{visibility:hidden}}.lecture-chat-sources{display:flex;flex-wrap:wrap;align-items:center;gap:6px;padding:0 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720px){.lecture-chat-input{flex-direction:column}}.resume-banner{display:flex;align-items:center;gap:16px;padding:18px 20px;background:linear-gradient(135deg,var(--accent-soft) 0%,var(--accent-soft-2) 100%);border:1px solid var(--rule);border-radius:14px;flex-wrap:wrap;animation:fadeIn .3s ease}.resume-banner-icon{width:40px;height:40px;border-radius:10px;background:var(--bg-elevated);display:flex;align-items:center;justify-content:center;flex-shrink:0;border:1px solid var(--rule)}.spinner-ring{display:inline-block;border-style:solid;border-color:var(--rule);border-top-color:var(--accent);border-radius:50%;animation:spinner-rotate .8s linear infinite;flex-shrink:0}@keyframes spinner-rotate{to{transform:rotate(360deg)}}.dashboard-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media (max-width: 720px){.dashboard-stats{grid-template-columns:1fr;gap:12px}.dashboard-stats .stat-tile{padding:16px 18px}.dashboard-stats .stat-tile 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.streak-card{color:#1c1c1a}.streak-flame{font-size:32px}.streak-num{font-size:28px;font-weight:700;letter-spacing:-.02em;line-height:1}.streak-label{font-size:12px;font-weight:600;opacity:.7;margin-top:4px}.flashcard-stage{display:flex;flex-direction:column;align-items:center;padding-top:16px}.flashcard-topbar{display:flex;justify-content:space-between;align-items:center;width:100%;max-width:560px;margin-bottom:14px}.flashcard-counter{display:inline-flex;align-items:center;gap:4px;font-size:14px;font-weight:600;color:var(--text);font-variant-numeric:tabular-nums}.flashcard-progress{width:100%;max-width:560px;height:4px;background:var(--rule);border-radius:2px;overflow:hidden;margin-bottom:32px}.flashcard-progress-fill{height:100%;background:var(--accent);border-radius:2px;transition:width .3s ease}.flashcard-stack{position:relative;width:100%;max-width:560px;height:340px;perspective:1200px}.flashcard-stack-behind{position:absolute;top:0;right:0;bottom:0;left:0;background:var(--bg-elevated);border:1.5px solid var(--rule);border-radius:22px;box-shadow:var(--shadow);pointer-events:none;transition:transform .3s ease,opacity .3s ease}.flashcard{position:absolute;top:0;right:0;bottom:0;left:0;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.32,.72,0,1),opacity .25s ease}.flashcard.flashcard-out-left{transform:translate(-140%) rotate(-12deg);opacity:0}.flashcard.flashcard-out-right{transform:translate(140%) rotate(12deg);opacity:0}.flashcard-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.32,.72,0,1)}.flashcard.flipped 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ease}.deck-card:hover:not(:disabled){border-color:var(--accent);transform:translateY(-1px)}.deck-card.active{border-color:var(--accent);background:var(--accent-soft)}.deck-card:disabled{opacity:.5;cursor:not-allowed}.deck-card-head{min-height:26px;display:flex;align-items:center}.deck-card-icon{font-size:24px}.deck-card-title{font-size:15px;font-weight:600;letter-spacing:-.01em}.deck-card-stats{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:12px;color:var(--text-muted)}.deck-card-num{font-weight:700;color:var(--text);font-variant-numeric:tabular-nums}.deck-card-mastered{color:var(--success);font-weight:600}.deck-card-bar{height:4px;background:var(--rule);border-radius:2px;overflow:hidden;margin-top:4px}.deck-card-bar-fill{height:100%;background:linear-gradient(90deg,var(--success) 0%,var(--accent) 100%);border-radius:2px;transition:width .3s ease}.session-summary{padding:22px 24px}.session-summary-cols{display:grid;grid-template-columns:1fr 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button.active{background:var(--bg-elevated);color:var(--text);box-shadow:0 1px 2px #0000000f}