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var(--color-bg-contrast-hover)}.btn-primary-themed:active{transform:translate(1px,1px);filter:brightness(0.9)}.btn-primary-themed:disabled,.btn-primary-themed[disabled]{opacity:0.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-primary-themed.btn-large{font-size:1.1rem;padding:12px 28px}.btn-primary-themed.btn-icon-only,.btn-secondary-themed.btn-icon-only{padding:12px;width:auto;min-width:48px;border-radius:10px}.btn-secondary-themed{background-color:var(--color-bg-page);color:var(--color-text-primary);border:3px solid var(--color-border-strong);padding:10px 22px;box-shadow:4px 4px 0 var(--color-border-strong);transform:translate(-2px,-2px)}.btn-secondary-themed:hover{background-color:var(--color-bg-muted);color:var(--color-text-primary);transform:translate(0,0);box-shadow:0 0 0 var(--color-border-strong)}.btn-danger-themed{background-color:var(--color-danger);color:var(--color-text-inverse-menu);border:3px solid var(--color-danger);padding:10px 22px;box-shadow:4px 4px 0 color-mix(in srgb,var(--color-danger) 60%,black);transform:translate(-2px,-2px)}.btn-danger-themed:hover{filter:brightness(0.9);transform:translate(0,0);box-shadow:0 0 0 transparent}.btn-danger-themed:disabled,.btn-danger-themed[disabled]{background-color:var(--color-border-subtle);border-color:var(--color-border-subtle);color:var(--color-text-muted);cursor:not-allowed;transform:none;box-shadow:none}.btn-danger-themed.btn-confirm{min-width:120px}.btn-danger-themed-outline{background-color:var(--color-bg-card);color:var(--color-danger);border:3px solid var(--color-danger);padding:8px 16px;width:auto;border-radius:8px;display:inline-flex;align-items:center;justify-content:center;transition:all 0.15s cubic-bezier(0.4,0,0.2,1);cursor:pointer}.btn-danger-themed-outline:hover{background-color:var(--color-danger);color:white;transform:translate(2px,2px);box-shadow:1px 1px 0 var(--color-border-strong)}.quiz-setup .btn-primary,.quiz-setup-s2s .btn-primary,.quiz-setup 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.btn-primary:active{box-shadow:none;transform:translateY(0.25rem)}.btn-outline-primary:hover,.btn-outline-primary.active{background-color:var(--color-bg-contrast);border-color:var(--color-bg-contrast);color:var(--color-text-inverse-menu)}.btn-outline-secondary{color:var(--color-text-secondary);border-color:var(--color-border-strong);background-color:transparent}.btn-outline-secondary:hover{background-color:var(--color-bg-hover);border-color:var(--color-border-strong);color:var(--color-text-primary)}.btn-outline-info{color:var(--color-text-muted);border-color:var(--color-text-muted);background-color:transparent}.btn-outline-info:hover,.btn-outline-info.active{background-color:var(--color-text-muted);border-color:var(--color-text-muted);color:var(--color-text-inverse)}.btn-outline-danger{color:var(--color-danger);border-color:var(--color-danger);background-color:transparent}.btn-outline-danger:hover{background-color:var(--color-danger);border-color:var(--color-danger);color:var(--color-text-inverse)}.btn-primary{background-color:var(--color-bg-contrast);border-color:var(--color-bg-contrast);color:var(--color-text-inverse-menu);padding:10px 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var(--color-bg-contrast-hover)}.btn-login:active{transform:translate(1px,1px)}.back-link-btn,.back-link{background-color:var(--color-bg-page);color:var(--color-text-primary);border:3px solid var(--color-border-strong);padding:8px 18px;border-radius:10px;font-weight:700;text-decoration:none;display:inline-flex;align-items:center;gap:8px;transition:all 0.2s ease}.back-link-btn:hover,.back-link:hover{background-color:var(--color-bg-muted);color:var(--color-text-primary);text-decoration:none}.btn-text-link{display:inline;background:none;border:none;padding:0;margin:0;font-family:var(--f-sans);font-size:1rem;font-weight:600;line-height:1.5;color:var(--color-text-muted);text-decoration:underline;text-decoration-color:currentColor;text-underline-offset:3px;cursor:pointer;transition:color 0.15s ease}.btn-text-link:hover{color:var(--color-text-primary);text-decoration-color:currentColor}.bold-action-btn{background:var(--button-primary-bg);color:var(--button-primary-text);border:3px solid var(--button-primary-bg);padding:16px 32px;border-radius:12px;font-size:1.1rem;box-shadow:4px 4px 0 var(--color-btn-primary-shadow,var(--color-border-strong));transform:translate(-2px,-2px);width:100%}.bold-action-btn:hover{background:var(--button-primary-bg-hover);border-color:var(--button-primary-bg-hover);color:var(--button-primary-text);transform:translate(0,0);box-shadow:0 0 0 transparent}.bold-action-btn:active{transform:translate(1px,1px);box-shadow:none}.btn-chapter{padding:8px 20px;border-radius:8px;font-family:'Bricolage Grotesque',sans-serif;font-weight:700;font-size:0.9rem;transition:all 0.15s cubic-bezier(0.4,0,0.2,1);border:3px solid var(--color-text-primary);color:var(--color-text-primary);cursor:pointer;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-height:40px;box-shadow:4px 4px 0 var(--color-border-strong)}.btn-chapter:hover{color:var(--color-text-primary);background-color:var(--color-bg-muted)}.btn-chapter-primary{background:var(--button-primary-bg);color:var(--button-primary-text);border-color:var(--button-primary-bg)}.btn-chapter-primary:hover{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--color-border-strong);background:var(--button-primary-bg-hover);border-color:var(--button-primary-bg-hover);color:var(--button-primary-text);text-decoration:none}.btn-arrow{background:none;border:2px solid var(--color-border);color:var(--color-text-muted);cursor:pointer;padding:6px 10px;border-radius:6px;transition:all 0.2s;font-size:13px;line-height:1;min-height:unset}.btn-arrow:hover:not(:disabled){background:var(--color-bg-hover);border-color:var(--color-border-strong);color:var(--color-text-primary)}.btn-arrow:disabled{opacity:0.25;cursor:not-allowed}.btn-minimize{background:none;border:none;color:var(--color-text-muted);cursor:pointer;padding:6px 10px;border-radius:6px;transition:all 0.2s;font-size:14px;min-height:unset}.btn-minimize:hover{background:var(--color-bg-hover);color:var(--color-text-primary)}.btn-minimize i{transition:transform 0.2s}.module-group.minimized .btn-minimize i{transform:rotate(-90deg)}.btn-delete{background:none;border:none;color:var(--color-danger);cursor:pointer;padding:6px 10px;border-radius:6px;transition:all 0.2s;font-size:14px;min-height:unset}.btn-delete:hover{background:var(--color-danger-soft)}.btn-remove-module,.btn-remove-topic{background:none;border:none;color:var(--color-danger);cursor:pointer;padding:4px 8px;border-radius:6px;transition:all 0.2s;font-size:0.875rem;min-height:unset}.btn-remove-module:hover,.btn-remove-topic:hover{background-color:var(--color-danger-soft)}.btn-add-topic{font-size:0.875rem;padding:8px 16px}.btn-save-all{position:sticky;bottom:20px;width:100%;max-width:300px;margin:30px auto;display:block;font-size:1rem;font-weight:700;padding:14px 32px;background:var(--color-bg-contrast);color:var(--color-text-inverse-menu);border:3px solid var(--color-bg-contrast);border-radius:12px;box-shadow:4px 4px 0 var(--color-bg-contrast-hover);transform:translate(-2px,-2px);z-index:100;cursor:pointer;transition:all 0.2s}.btn-save-all:hover{background:var(--color-bg-contrast-hover);transform:translate(0,0);box-shadow:0 0 0 var(--color-bg-contrast-hover)}.btn-save-all:disabled{opacity:0.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-edit-topic{background-color:var(--color-text-muted);border-color:var(--color-text-muted);color:var(--color-text-inverse);font-size:0.875rem;padding:8px 16px;border-radius:8px;border:2px solid var(--color-text-muted);cursor:pointer;transition:all 0.2s;min-height:unset}.btn-edit-topic:hover{background-color:var(--color-text-label);border-color:var(--color-text-tertiary)}.nav-button{width:100%;padding:12px 16px;border:2px solid transparent;border-radius:12px;background:transparent;color:var(--color-text-primary);display:flex;align-items:center;gap:12px;font-weight:600;transition:all 0.2s ease;cursor:pointer;text-align:left;text-decoration:none}.nav-button:hover{background-color:var(--color-bg-muted);border-color:var(--color-border-subtle);transform:translateX(4px)}.nav-button.active{background-color:var(--color-bg-contrast);color:var(--color-text-inverse-menu);border-color:var(--color-bg-contrast)}.nav-button.primary{background-color:var(--color-primary-soft);color:var(--color-text-primary);border-color:var(--color-primary-strong)}.nav-button.subtle{color:var(--color-text-secondary);opacity:0.8}.nav-button.subtle:hover{opacity:1;color:var(--color-danger)}html[data-theme="dark"] .btn-close{filter:invert(1) grayscale(100%) brightness(200%)}@media (max-width:768px){.modal-footer .btn-primary-themed,.modal-footer .btn-secondary-themed,.modal-footer .btn-danger-themed{width:100%}.btn-primary,.btn-outline-primary{width:100%;padding:12px 24px}}@media (pointer:coarse){.btn,.btn-primary-themed,.btn-secondary-themed,.btn-danger-themed{min-height:48px}}.view-course-btn{display:flex;align-items:center;justify-content:center;padding:10px 20px;background:var(--color-bg-contrast);color:var(--color-text-inverse-menu);border:3px solid var(--color-text-primary);border-radius:8px;text-decoration:none;transition:all 0.15s cubic-bezier(0.4,0,0.2,1);box-shadow:4px 4px 0 var(--color-border-strong);position:relative}.view-course-btn:hover{transform:translate(2px,2px);box-shadow:1px 1px 0 var(--color-border-strong);background:var(--color-bg-contrast-hover)}.view-course-btn span{font-family:"Bricolage Grotesque",sans-serif;font-size:14px;color:var(--color-text-inverse-menu);font-weight:800;letter-spacing:0.5px;text-transform:uppercase}.hp-login-btn,.hp-signup-btn,.hp-btn-primary,.hp-btn-secondary,.hp-btn-large{font-family:"Plus Jakarta 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36px;font-size:1.25rem;box-shadow:0 6px 0 var(--color-bg-contrast-hover);transform:translateY(-6px);border-radius:20px;border:3px solid transparent;box-sizing:border-box}.hp-btn-primary:hover{filter:brightness(0.95);transform:translateY(-3px);box-shadow:0 3px 0 var(--color-bg-contrast-hover)}.hp-btn-primary:active{filter:brightness(0.9);box-shadow:0 0 0 var(--color-bg-contrast-hover);transform:translateY(0)}.hp-btn-secondary{display:inline-flex;justify-content:center;align-items:center;padding:16px 36px;background-color:var(--color-bg-page);color:var(--color-text-primary);font-weight:800;font-size:1.25rem;text-decoration:none;border-radius:20px;border:3px solid var(--color-border-strong);box-shadow:0 6px 0 var(--color-border-strong);transform:translateY(-6px);transition:all 0.1s cubic-bezier(0.4,0,0.2,1);box-sizing:border-box}.hp-btn-secondary:hover{background-color:var(--color-bg-muted);transform:translateY(-3px);box-shadow:0 3px 0 var(--color-border-strong);color:var(--color-text-primary);filter:brightness(0.95)}.hp-btn-secondary:active{box-shadow:0 0 0 var(--color-border-strong);transform:translateY(0);background-color:var(--color-bg-muted);color:var(--color-text-primary);filter:brightness(0.9)}.hp-btn-large{padding:20px 56px;font-size:1.4rem;border-radius:24px;box-shadow:0 8px 0 var(--color-bg-contrast-hover);transform:translateY(-8px)}.hp-btn-large:hover{filter:brightness(0.95);transform:translateY(-4px);box-shadow:0 4px 0 var(--color-bg-contrast-hover)}.hp-btn-large:active{filter:brightness(0.9);box-shadow:0 0 0 var(--color-bg-contrast-hover);transform:translateY(0)}@media (max-width:900px){.hp-btn-primary,.hp-btn-secondary{padding:12px 28px;font-size:1.1rem;border-radius:16px;box-shadow:0 4px 0 var(--color-bg-contrast-hover);transform:translateY(-4px)}.hp-btn-secondary{box-shadow:0 4px 0 var(--color-border-strong)}.hp-btn-primary:hover,.hp-btn-secondary:hover{transform:translateY(-2px);box-shadow:0 2px 0 var(--color-bg-contrast-hover)}.hp-btn-secondary:hover{box-shadow:0 2px 0 var(--color-border-strong)}.hp-btn-primary:active,.hp-btn-secondary:active{transform:translateY(0);box-shadow:0 0 0 var(--color-bg-contrast-hover)}}@media (max-width:600px){.hp-nav-actions .hp-login-btn{display:none}.hp-signup-btn{padding:0.4rem 1rem;font-size:1rem}}.social-login-btn{border:1px solid var(--color-tag-muted-border);background-color:var(--color-bg-card);color:var(--color-text-primary);border-radius:0.75rem;padding:0.75rem;transition:all 0.2s ease}.social-login-btn:hover{box-shadow:var(--shadow-medium);border-color:var(--color-accent-primary)}.auth-page .btn-primary{font-family:"Bricolage Grotesque",sans-serif;font-weight:700}.form-control:focus,.form-select:focus,.btn:focus{outline:none;box-shadow:0 0 0 0.25rem var(--focus-ring)}.menu-toggle-btn{position:relative}.cookie-reopen-btn{margin-top:6px;padding:2px 0;font-size:0.8rem;background:transparent;border:none;color:var(--base-text-secondary);display:inline-flex;align-items:center;gap:6px;cursor:pointer}.cookie-reopen-btn:hover{color:var(--base-text-primary)}.bold-btn{font-weight:800;border-width:2px;border-style:solid;border-radius:8px;transition:all 0.2s ease;cursor:pointer}.lang-btn,.language-btn{width:auto;min-width:44px;height:44px;border-radius:10px;font-family:'Bricolage Grotesque',sans-serif;font-weight:800;border:3px solid var(--color-border-strong);background:var(--color-bg-card);color:var(--color-text-primary);padding:8px 12px;cursor:pointer;transition:all 0.15s cubic-bezier(0.4,0,0.2,1);display:inline-flex;align-items:center;justify-content:center;overflow:hidden}.language-btn.rounded-circle{border-radius:50%!important;width:44px;height:44px;padding:0}.language-btn .fi,.language-btn img{width:24px!important;height:auto!important;object-fit:contain;border-radius:2px}.language-btn.rounded-circle .fi,.language-btn.rounded-circle img{width:100%!important;height:100%!important;object-fit:cover;border-radius:50%}.lang-btn:hover,.language-btn:hover{border-color:var(--color-text-primary);background:var(--color-bg-hover)}.lang-btn.active,.language-btn.active{background:var(--button-primary-bg)!important;color:var(--button-primary-text)!important;border-color:var(--button-primary-bg)!important;z-index:1;box-shadow:2px 2px 0 var(--color-border-strong)}.lang-btn:first-child{border-top-right-radius:0;border-bottom-right-radius:0}.lang-btn:last-child{border-top-left-radius:0;border-bottom-left-radius:0;border-left:none}.library-create-course-btn{font-family:"Bricolage Grotesque",sans-serif;padding:12px 20px;border-radius:8px;background:var(--color-bg-contrast);color:var(--color-text-inverse-menu);font-weight:600;text-decoration:none;white-space:nowrap;transition:all 0.2s;border:none;display:inline-flex;align-items:center;gap:8px}.library-create-course-btn:hover{background:var(--color-bg-contrast-hover)}.btn-skip-minimal{position:absolute;right:0.5rem;margin-left:1rem;background:none;border:none;color:var(--color-text-muted);padding:0.25rem 0.5rem;text-decoration:underline}.btn-skip-minimal:hover{color:var(--color-text-secondary)}.btn-quiz{padding:1rem 2.5rem;font-size:1.25rem;font-weight:700;border-radius:1rem;transition:all 0.3s ease}.btn-check-answer{background-color:var(--color-text-tertiary);color:var(--color-text-inverse-menu);border:none;box-shadow:0 0.25rem 0 var(--color-bg-contrast)}.btn-check-answer:hover:not([disabled]){transform:translateY(-2px);box-shadow:0 0.375rem 0 var(--color-bg-contrast);background-color:var(--color-bg-contrast);color:var(--color-text-inverse-menu)}.btn-check-answer:active:not([disabled]){transform:translateY(0);box-shadow:0 0 0 var(--color-bg-contrast);background-color:var(--color-bg-contrast);color:var(--color-text-inverse)}.btn-check-answer[disabled]{background-color:var(--color-border-strong);box-shadow:none}.btn-next{background-color:var(--color-accent-primary);color:var(--color-text-inverse-menu);border:none;box-shadow:0 0.25rem 0 var(--color-accent-primary-strong)}.btn-next:hover{transform:translateY(-2px);box-shadow:0 0.375rem 0 var(--color-accent-primary-strong);background-color:var(--color-accent-primary-strong);color:var(--color-text-inverse-menu)}.btn-next:active{transform:translateY(0);box-shadow:0 0 0 var(--color-accent-primary-strong)}.reward-buttons .btn{padding:0.75rem 1.5rem;font-weight:700;border-radius:0.75rem;transition:all 0.3s ease}.reward-buttons .btn:hover{transform:translateY(-3px);box-shadow:0 0.5rem 1rem var(--overlay-contrast-10)}.code-copy-btn{background:none;border:none;color:#a0a0a0;cursor:pointer;font-size:0.75rem;padding:0.15rem 0.4rem;border-radius:3px;transition:all 0.15s ease;display:flex;align-items:center;gap:0.3rem;font-family:inherit}.code-copy-btn:hover{background:rgba(255,255,255,0.1);color:#d0d0d0}.code-copy-btn.copied{color:#4ade80}.language-btn.rounded-circle{width:48px;height:48px;aspect-ratio:1;border-radius:50%!important;display:flex;align-items:center;justify-content:center;overflow:hidden;padding:0;border:none;background:var(--color-bg-card);box-shadow:0 2px 8px var(--overlay-contrast-08);transition:box-shadow 0.2s}.language-btn.rounded-circle:hover{box-shadow:0 4px 12px var(--overlay-contrast-08)}.language-btn .flag-round{width:36px;height:36px;border-radius:50%;overflow:hidden;display:block}.language-btn.rounded-circle .fi{width:100%;height:100%;border-radius:50%;font-size:2rem;display:block;background-size:cover;background-position:center;background-repeat:no-repeat}.language-btn.rounded-circle.active{background:var(--color-bg-card)!important;border-color:transparent!important;color:inherit!important;box-shadow:0 0 0 3px var(--color-bg-contrast)}.panel-toggle-btn{position:absolute;top:1rem;right:1.5rem;z-index:1050;width:40px;height:40px;background-color:var(--color-bg-card);border:2px solid var(--color-ai-toggle);box-shadow:0 0.25rem 1rem var(--color-ai-toggle-glow);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0;transition:all 0.3s ease}.panel-toggle-btn:hover{box-shadow:0 0.5rem 1.5rem var(--color-ai-toggle-glow);background-color:var(--color-ai-toggle);border-color:var(--color-ai-toggle)}.panel-toggle-btn:hover svg{color:var(--color-text-inverse-menu)}.panel-toggle-btn svg{width:20px;height:20px;color:var(--color-ai-toggle);transition:all 0.3s ease}.panel-toggle-btn.pulse-attention{animation:pulse-attention 5s cubic-bezier(0.66,0,0,1) 2;color:#eab308;border-color:#eab308}.panel-toggle-btn.pulse-attention svg{color:#eab308}.floating-menu-btn{width:3rem;height:3rem;border-radius:50%;background-color:var(--color-bg-card);color:var(--color-bg-contrast);border:1px solid var(--color-border);box-shadow:0 0.25rem 1rem var(--overlay-contrast-10);display:flex;align-items:center;justify-content:center;transition:all 0.5s cubic-bezier(0.68,-0.55,0.265,1.55)}.floating-menu-btn:hover,.floating-menu-btn[aria-expanded="true"]{transform:rotate(90deg);box-shadow:0 0 0 4px var(--overlay-contrast-10);background-color:var(--color-bg-contrast);color:var(--color-text-inverse);border-color:var(--color-bg-contrast)}.signup-modal-btn{background-color:var(--color-accent-primary);border-color:var(--color-accent-primary-strong);color:white;box-shadow:0 0.25rem 0 var(--color-accent-primary-strong);padding:0.75rem 1.5rem;border-radius:8px;transition:all 0.2s ease;text-decoration:none;display:inline-block;font-size:1.2rem;font-weight:700}.signup-modal-btn:hover{background-color:var(--color-accent-primary);border-color:var(--color-accent-primary-strong);color:white;transform:translateY(-2px);box-shadow:0 0.375rem 0 var(--color-accent-primary-strong)}.signup-modal-btn:active{transform:translateY(0);box-shadow:0 0 0 var(--color-accent-primary-darker)}.cta-btn{background-color:var(--card-bg);color:var(--primary-dark);border:none;padding:1rem 2.5rem;font-size:1.25rem;font-weight:800;border-radius:1rem;box-shadow:0 0.5rem 1.5rem var(--overlay-contrast-10);transition:all 0.3s ease;position:relative;overflow:hidden;z-index:1}.cta-btn:hover{background-color:var(--accent-color);transform:translateY(-0.25rem);box-shadow:0 0.75rem 2rem var(--overlay-contrast-15);color:var(--dark-text);border-color:var(--accent-color)}.cta-btn:active{transform:translateY(0);background-color:var(--accent-color);color:var(--dark-text)}.cta-btn:hover i{transform:translateX(0.25rem);color:var(--dark-text)}.theme-toggle-btn{display:flex;align-items:center;gap:0.5rem;color:var(--color-text-primary);transition:all 0.3s ease;background:none;border:none;padding:0.5rem 1rem;cursor:pointer;font-weight:600}.theme-toggle-btn:hover{color:var(--color-accent-primary);transform:translateY(-2px)}.theme-toggle-btn.dark-mode{color:var(--color-text-inverse)}.grid-nav-btn{align-items:center!important;background-color:var(--color-bg-card)!important;border:1px solid var(--color-border)!important;border-radius:6px!important;color:var(--color-text-tertiary)!important;display:flex!important;flex:0 0 36px!important;font-size:0.9rem!important;height:36px!important;justify-content:center!important;padding:0!important;transition:all 0.2s ease!important;width:36px!important}.grid-nav-btn:hover{background-color:var(--color-bg-hover)!important;border-color:var(--color-border-strong)!important}.grid-nav-btn.btn-secondary{background-color:var(--color-bg-muted)!important;border-color:var(--color-border2)!important;box-shadow:inset 0 1px 3px rgba(0,0,0,0.05)!important;color:var(--color-text-tertiary)!important}.grid-nav-btn.btn-primary{background-color:var(--color-bg-card)!important;border:2px solid var(--color-link)!important;box-shadow:none!important;color:var(--color-link)!important;font-weight:700!important}.exam-actions .btn{border-radius:6px;font-weight:500;letter-spacing:0.01em}.action-btn{background:transparent;border:none;padding:calc(var(--space-unit) * 1);cursor:pointer;color:var(--color-text-secondary);border-radius:6px;transition:all 0.2s ease;width:32px;height:32px;display:flex;align-items:center;justify-content:center}.action-btn:hover{background:var(--color-bg-soft);color:var(--color-text-primary)}.email-submit-btn{width:auto;margin-top:12px}.language-btn{width:48px;height:48px;border-radius:var(--radius);border:1px solid var(--c-border);background-color:transparent;cursor:pointer;transition:var(--transition-smooth);display:inline-flex;align-items:center;justify-content:center;padding:0;min-width:48px;box-sizing:border-box}.language-btn .fi{font-size:24px}.language-btn.active,.language-btn:hover{border-color:var(--c-accent);background-color:var(--c-bg-soft)}.language-btn:focus,.language-btn.active:focus{box-shadow:0 0 0 3px rgba(0,0,0,0.05)}.lang-btn{background-color:var(--c-bg-mute);border:1px solid var(--c-border);padding:10px 20px;border-radius:var(--radius);cursor:pointer;font-weight:500}.lang-btn.active{background-color:var(--c-accent);color:white;border-color:var(--c-accent)}.quiz-page .btn-secondary-themed{background-color:var(--c-bg);color:var(--c-text-primary);border:1px solid var(--c-border);padding:10px 15px;border-radius:var(--radius);cursor:pointer}.quiz-page .btn-secondary-themed:hover{background-color:var(--c-bg);border-color:var(--c-accent)}.quiz-page .btn-danger-themed{background-color:var(--c-bg);color:var(--c-text-secondary);border:1px solid var(--c-border);padding:10px 15px;border-radius:var(--radius);cursor:pointer;text-decoration:none;transition:background-color 0.2s,color 0.2s,border-color 0.2s}.quiz-page .btn-danger-themed:hover{background-color:var(--c-bg);color:#dc3545;border-color:#dc3545}.quiz-page .btn-primary-themed.btn-large{font-size:1.1rem;padding:12px 25px}.quiz-page .btn-icon-only{padding:12px;width:auto;min-width:48px}.quiz-page .btn-icon-only i{margin:0;font-size:1.1rem}.quiz-page .btn-danger-themed.btn-confirm{min-width:120px}.mac-btn{width:14px;height:14px;border-radius:6px;border:1px solid var(--color-danger,#dc3545);background:var(--color-danger);cursor:pointer;transition:all 0.2s ease;position:relative}.mac-btn::before,.mac-btn::after{content:"";position:absolute;top:50%;left:50%;width:8px;height:2px;background:var(--color-text-inverse,#ffffff);border-radius:1px;transform-origin:center}.mac-btn::before{transform:translate(-50%,-50%) rotate(45deg)}.mac-btn::after{transform:translate(-50%,-50%) rotate(-45deg)}.mac-btn:disabled{cursor:default;opacity:0.45}.mac-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 18px rgba(0,0,0,0.15)}.window-back-btn{border-radius:10px;padding:8px 12px;font-size:12px;background-color:rgba(255,255,255,0.06);border:1px solid rgba(255,255,255,0.12);color:var(--color-text-inverse-menu);transition:all 0.2s ease}.window-back-btn:hover{background-color:rgba(255,255,255,0.12);border-color:rgba(255,255,255,0.2)}.window-back-btn i{margin-right:0}@media (max-width:1200px){.menu-toggle-btn{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:none;background:linear-gradient(135deg,var(--color-bg-page) 0%,var(--color-bg-muted) 100%);color:var(--base-text-primary);border-radius:12px;cursor:pointer;transition:all 0.3s cubic-bezier(0.4,0,0.2,1);padding:0;box-shadow:0 4px 12px rgba(0,0,0,0.08),0 2px 4px rgba(0,0,0,0.04);border:1px solid rgba(0,0,0,0.06);position:relative;overflow:hidden}.menu-toggle-btn::before{content:"";position:absolute;inset:0;background:var(--primary-dark);opacity:0;transition:opacity 0.3s ease}.menu-toggle-btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,0.12),0 4px 8px rgba(0,0,0,0.06);border-color:rgba(0,0,0,0.1)}.menu-toggle-btn:active{transform:translateY(0) scale(0.96);box-shadow:0 2px 8px rgba(0,0,0,0.08),0 1px 4px rgba(0,0,0,0.04)}.menu-toggle-btn i{font-size:1.25rem;transition:transform 0.3s ease}.menu-toggle-btn:hover i{transform:scale(1.1)}.base-sidebar.open .menu-toggle-btn{background:linear-gradient(135deg,var(--color-bg-contrast) 0%,var(--color-bg-contrast) 100%);color:var(--color-text-inverse);box-shadow:0 8px 20px rgba(0,0,0,0.2),0 4px 8px rgba(0,0,0,0.1)}.base-sidebar.open .menu-toggle-btn i{transform:rotate(90deg)}.mobile-login-btn{display:flex;align-items:center;justify-content:center;gap:12px;padding:calc(var(--space-unit) * 2) calc(var(--space-unit) * 3);background-color:var(--color-bg-contrast);color:var(--color-text-inverse-menu);border-radius:8px;font-size:1rem;font-weight:600;text-decoration:none;transition:all 0.2s ease;min-height:48px;box-shadow:0 2px 8px rgba(45,45,45,0.2)}.mobile-login-btn:hover{background-color:var(--color-bg-contrast-hover);transform:translateY(-1px);box-shadow:0 4px 12px rgba(45,45,45,0.3)}.modal-footer .btn-primary-themed,.modal-footer .btn-secondary-themed{width:100%}}@media (max-width:480px){.menu-toggle-btn{width:44px;height:44px;border-radius:11px}.menu-toggle-btn i{font-size:1.125rem}}@media (max-width:360px){.menu-toggle-btn{width:42px;height:42px;border-radius:10px}.menu-toggle-btn i{font-size:1rem}.mobile-login-btn{padding:calc(var(--space-unit) * 2) calc(var(--space-unit) * 2.5);font-size:0.9rem;gap:8px}}@media (max-width:768px){.library-create-course-btn{display:none!important}}#feedbackModal .btn-close{filter:none}#feedbackModal .btn-secondary,#feedbackModal .btn-primary{border-radius:0;padding:0.75rem 1.5rem;font-family:"Roboto Mono","IBM Plex Mono",monospace;text-transform:uppercase;letter-spacing:1px;font-weight:600;border:1px solid var(--color-border);transition:all 0.3s ease}#feedbackModal .btn-secondary{background-color:transparent;color:var(--color-text-label)}#feedbackModal .btn-secondary:hover{border-color:var(--color-text-primary);color:var(--color-text-primary);background-color:var(--color-bg-muted)}#feedbackModal .btn-primary{background-color:var(--color-text-primary);color:var(--color-text-inverse);border-color:var(--color-text-primary)}#feedbackModal .btn-primary:hover{background-color:var(--color-text-secondary);border-color:var(--color-text-secondary);color:var(--color-text-inverse)}@media (min-width:576px) and (max-width:767.98px){.btn-primary,.btn-outline-primary{width:auto;display:inline-block;margin-right:var(--spacing-sm)}.btn-skip-minimal{position:relative}}@media (max-width:575.98px){.btn-primary{padding:0.75rem 1.5rem;font-size:1rem;width:100%;margin-bottom:var(--spacing-sm)}.btn-outline-primary{width:100%;padding:0.75rem 1.5rem}.btn-skip-minimal{position:relative}}@media (max-width:1199.98px){#toggle-ai-panel-btn{display:none!important}}@media (pointer:coarse){.btn{min-height:44px;padding:0.75rem 1.5rem}}#signup-prompt-modal .btn-close{position:absolute;top:1rem;right:1rem;z-index:10;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--color-text-muted);opacity:0.7}#signup-prompt-modal .btn-close:hover{opacity:1}@media (max-width:576px){.signup-modal-btn{padding:0.6rem 1rem;font-size:1rem}}#generate-pdf-btn{position:relative;overflow:hidden;transition:var(--transition-smooth);min-height:48px;z-index:20}#generate-pdf-btn.loading{pointer-events:none;background-color:var(--c-accent);border-color:var(--c-accent);color:var(--c-bg);opacity:0.9}#generate-pdf-btn.loading .fas{display:none}#generate-pdf-btn.loading span{opacity:0}#generate-pdf-btn.loading::after{content:"Generating...";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:0.9rem;font-weight:500;color:var(--c-bg);white-space:nowrap}@media (max-width:768px){.btn-primary-themed,.btn-secondary-themed,.btn-danger-themed{min-height:48px;padding:calc(var(--space-unit) * 2) calc(var(--space-unit) * 3)}.modal-footer .btn{flex:1;min-height:44px}#generate-pdf-btn{min-height:48px;padding:calc(var(--space-unit) * 2.5) calc(var(--space-unit) * 3);font-size:1rem}.btn-close{padding:calc(var(--space-unit) * 2);margin:calc(var(--space-unit) * -1)}}@media (max-width:480px){.btn-primary-themed,.btn-secondary-themed,.btn-danger-themed{min-height:44px;padding:calc(var(--space-unit) * 2) calc(var(--space-unit) * 3)}.language-btn{width:52px;height:52px}}@media print{.btn{display:none!important}}