.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-body);font-weight:600;font-size:.95rem;padding:12px 28px;border-radius:var(--radius-md);border:none;cursor:pointer;transition:all .25s var(--ease-out);position:relative;overflow:hidden}.btn-primary{background:var(--emerald);color:var(--text-inverse);box-shadow:var(--shadow-glow)}.btn-primary:hover{background:var(--emerald-dark);transform:translateY(-1px);box-shadow:0 0 40px rgba(16,185,129,.25)}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border-medium);transition:var(--transition-theme),transform .2s var(--ease-out)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--border-accent)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 16px}.btn-ghost:hover{color:var(--text-primary);background:var(--border-subtle)}.btn-large{padding:16px 36px;font-size:1.05rem;border-radius:var(--radius-lg)}.card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:24px;transition:all .3s var(--ease-out)}.card:hover{border-color:var(--border-medium);box-shadow:var(--shadow-md)}.input{width:100%;font-family:var(--font-body);font-size:.95rem;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-md);color:var(--text-primary);outline:none;transition:border-color .2s ease,box-shadow .2s ease,background .3s ease}.input:focus{border-color:var(--border-medium);box-shadow:0 0 0 2px rgba(255,255,255,.05)}[data-theme=light] .input:focus{border-color:var(--text-tertiary);box-shadow:0 0 0 2px rgba(0,0,0,.04)}.input::placeholder{color:var(--text-tertiary)}.glass{background:var(--bg-overlay);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-subtle)}.theme-toggle{width:32px;height:32px;border-radius:50%;border:1px solid var(--border-medium);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s var(--ease-out);flex-shrink:0;overflow:hidden}.theme-toggle:hover{border-color:var(--text-tertiary);color:var(--text-primary);box-shadow:none}.theme-toggle:hover .theme-icon{transform:rotate(15deg)}.theme-icon{display:block;animation:themeIconIn .5s var(--ease-spring) both;transition:transform .3s var(--ease-out)}@keyframes themeIconIn{0%{opacity:0;transform:scale(.4) rotate(-120deg)}to{opacity:1;transform:scale(1) rotate(0deg)}}.lang-toggle{height:32px;padding:0 10px;border-radius:16px;border:1px solid var(--border-medium);background:var(--bg-card);color:var(--text-secondary);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .3s var(--ease-out);flex-shrink:0}.lang-toggle:hover{border-color:var(--text-tertiary);color:var(--text-primary)}.lang-toggle-label{font-size:.75rem;font-weight:600;letter-spacing:.02em}