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var(--color-border);border-radius:12px;margin:0}.benefit-card-title{margin:0 0 8px;font-size:1.05rem;font-weight:600;color:var(--color-dark);line-height:1.3}.benefit-card-desc{margin:0;font-size:.95rem;line-height:1.6;color:var(--color-muted)}@media(min-width:768px){.benefits-grid{grid-template-columns:repeat(2,1fr);gap:22px}}.vocabulary-practice-page p{margin:20px 0;line-height:1.7}@media(max-width:640px){.vocabulary-practice-page{padding:40px 0 60px}.vocabulary-practice-page .container{padding:0 20px}.vocabulary-practice-page h2:before{width:30px;height:2px}}.interactive-demo-section{margin:48px 0;padding-top:32px;border-top:1px solid var(--color-border)}.interactive-demo-section-heading{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.interactive-demo-section .demo-badge{margin-bottom:5px;display:inline-block;padding:4px 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#ffffff;--app-button-text: #0f172a;--app-button-shadow: 0 2px 8px rgba(0, 0, 0, .15);background:var(--app-bg);border:none;border-radius:20px;padding:32px 40px 40px;color:var(--app-text)}.demo-mode-tabs{display:flex;gap:0;margin-bottom:32px;padding:4px;background:#ffffff1f;border-radius:12px;width:fit-content;margin-left:auto;margin-right:auto}.demo-mode-tab{padding:10px 18px;font-size:.95rem;font-weight:600;color:var(--app-text-muted);background:transparent;border:none;border-radius:10px;cursor:pointer;font-family:inherit;transition:color .2s ease,background .2s ease}.demo-mode-tab:hover{color:var(--app-text)}.demo-mode-tab[aria-selected=true]{background:var(--app-button-bg);color:var(--app-button-text)}.demo-mode-tab:focus-visible{outline:2px solid rgba(255,255,255,.8);outline-offset:2px}.demo-body{position:relative;min-height:280px}.demo-screen{display:none}.demo-screen.demo-screen-active{display:block}.demo-screen[hidden]{display:none!important}.demo-screen-title{margin:0 0 20px;font-size:.9rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px;color:var(--app-text-muted);text-align:center}.demo-prompt-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:120px;margin-bottom:28px;padding:28px 32px;background:#ffffff1a;border-radius:16px;border:2px dashed rgba(255,255,255,.25)}.demo-prompt-text{font-size:clamp(2rem,5vw,3rem);font-weight:700;color:var(--app-text)}.demo-prompt-hint{font-size:1rem;color:var(--app-text-muted)}.demo-answers-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.demo-answer-btn{padding:14px 20px;background:var(--app-button-bg);color:var(--app-button-text);border:none;border-radius:12px;font-size:1rem;font-weight:600;box-shadow:var(--app-button-shadow);cursor:pointer;font-family:inherit;transition:transform .2s ease,box-shadow .2s ease}.demo-answer-btn:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0003}.demo-answer-btn:focus-visible{outline:2px solid rgba(255,255,255,.8);outline-offset:2px}.demo-answer-btn.correct{background:#10b981;color:#fff}.demo-answer-btn.incorrect{background:#ef4444;color:#fff}.demo-answer-btn:disabled,.demo-answer-btn.answered-dim{cursor:default}.demo-answer-btn:disabled:hover,.demo-answer-btn.answered-dim:hover{transform:none;box-shadow:var(--app-button-shadow)}.demo-answer-btn.answered-dim{opacity:.5;pointer-events:none}.demo-retry-wrap{margin-top:24px;text-align:center}.interactive-demo-panel.app-style .demo-retry-btn{padding:12px 24px;background:#fff3;color:var(--app-text);border:1px solid rgba(255,255,255,.4);border-radius:12px;font-size:1rem;font-weight:600;cursor:pointer;font-family:inherit;transition:background .2s ease,border-color .2s ease}.interactive-demo-panel.app-style .demo-retry-btn:hover{background:#ffffff4d;border-color:#fff9}.interactive-demo-panel.app-style .demo-retry-btn:focus-visible{outline:2px solid rgba(255,255,255,.8);outline-offset:2px}.demo-assemble-label{margin:0 0 12px;font-size:.9rem;color:var(--app-text-muted);text-align:center}.demo-assemble-slots{display:flex;justify-content:center;align-items:center;gap:8px;margin-bottom:24px;min-height:52px;position:relative;width:fit-content;margin-left:auto;margin-right:auto}.demo-slot{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;background:#ffffff1a;border:2px dashed rgba(255,255,255,.3);border-radius:10px;font-size:1.5rem;font-weight:700;color:var(--app-text)}.demo-letter-tiles{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}.demo-letter-tile{width:48px;height:48px;padding:0;background:var(--app-button-bg);color:var(--app-button-text);border:none;border-radius:12px;font-size:1.25rem;font-weight:700;box-shadow:var(--app-button-shadow);cursor:pointer;font-family:inherit;transition:transform .2s ease,box-shadow .2s ease}.demo-letter-tile:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0003}.demo-letter-tile:focus-visible{outline:2px solid rgba(255,255,255,.8);outline-offset:2px}.demo-letter-tile:disabled,.demo-letter-tile.tile-used{opacity:.5;cursor:default}.demo-letter-tile:disabled:hover,.demo-letter-tile.tile-used:hover{transform:none}.interactive-demo-panel.app-style .demo-assemble-slots .assemble-result-icon{position:absolute;left:100%;margin-left:12px;top:50%;transform:translateY(-50%);width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700}.interactive-demo-panel.app-style .demo-assemble-slots .result-icon-check{background:#10b981;color:#fff}.interactive-demo-panel.app-style .demo-assemble-slots .result-icon-cross{background:#ef4444;color:#fff}@media(max-width:640px){.demo-mode-tabs{flex-wrap:wrap}.demo-mode-tab{flex:1 1 auto}.demo-prompt-card{min-height:100px;padding:20px 24px}.demo-answers-grid{gap:10px}.demo-answer-btn{padding:12px 16px;font-size:.95rem}}