.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-family:inherit;white-space:nowrap;cursor:pointer;border:none;border-radius:var(--border-radius-lg);background:transparent;transition:var(--transition-glow),var(--transition-transform);position:relative}.btn:disabled{opacity:.5;cursor:not-allowed}.btn:focus-visible{outline:none;box-shadow:var(--glow-blue-intense)}.btn-sm{padding:8px 16px;font-size:13px}.btn-md{padding:12px 20px;font-size:14px}.btn-lg{padding:14px 24px;font-size:16px}.btn-xl{padding:16px 32px;font-size:18px}.btn-primary{background:transparent;color:rgba(56,189,248,.95);box-shadow:var(--glow-blue-subtle)}.btn-primary:hover:not(:disabled){box-shadow:var(--glow-blue);transform:translateY(-2px);background:rgba(56,189,248,.06);color:#38bdf8}.btn-primary:active:not(:disabled){transform:translateY(0);box-shadow:var(--glow-blue-hover)}.btn-primary:focus-visible{box-shadow:var(--glow-blue-intense)}.btn-secondary{background:transparent;color:var(--text-secondary,#374151);box-shadow:var(--glow-blue-subtle)}.btn-secondary:hover:not(:disabled){box-shadow:var(--glow-blue);transform:translateY(-2px);background:rgba(0,0,0,.04);color:var(--text-primary,#111827)}.btn-secondary:active:not(:disabled){transform:translateY(0);box-shadow:var(--glow-blue-hover);background:rgba(0,0,0,.06)}.btn-secondary:focus-visible{box-shadow:var(--glow-blue-intense)}.btn-accent{background:transparent;color:rgba(249,115,22,.95);box-shadow:var(--glow-orange-subtle)}.btn-accent:hover:not(:disabled){box-shadow:var(--glow-orange);transform:translateY(-2px);background:rgba(249,115,22,.06);color:#f97316}.btn-accent:active:not(:disabled){transform:translateY(0);box-shadow:var(--glow-orange-hover)}.btn-accent:focus-visible{box-shadow:var(--glow-orange-intense)}.btn-ghost{background:transparent;color:var(--text-secondary,#374151);box-shadow:none}.btn-ghost:hover:not(:disabled){background:rgba(0,0,0,.04);box-shadow:var(--glow-blue-subtle);transform:translateY(-2px);color:var(--text-primary,#111827)}.btn-ghost:active:not(:disabled){transform:translateY(0);background:rgba(0,0,0,.06);box-shadow:var(--glow-blue-subtle)}.btn-ghost:focus-visible{box-shadow:var(--glow-blue-intense)}.btn-loading{position:relative;color:transparent;pointer-events:none}.btn-loading:after{content:"";position:absolute;width:16px;height:16px;top:50%;left:50%;margin-left:-8px;margin-top:-8px;border-radius:50%;border:2px solid rgba(56,189,248,.4);border-top-color:rgba(56,189,248,.9);animation:btn-spin .6s linear infinite}@keyframes btn-spin{to{transform:rotate(1turn)}}.btn-icon-left,.btn-icon-right{display:inline-flex;align-items:center;gap:8px}.btn-icon-right{flex-direction:row-reverse}.btn-full{width:100%}@media (max-width:768px){.btn-accent:active:not(:disabled),.btn-accent:hover:not(:disabled),.btn-ghost:active:not(:disabled),.btn-ghost:hover:not(:disabled),.btn-primary:active:not(:disabled),.btn-primary:hover:not(:disabled),.btn-secondary:active:not(:disabled),.btn-secondary:hover:not(:disabled){transform:none}}@media (prefers-reduced-motion:reduce){.btn{transition:none}.btn-loading:after{animation:none}}