:root{--color-primary: #6b21a8;--color-primary-dark: #581c87;--color-bg: #f8fafc;--color-surface: #ffffff;--color-text: #0f172a;--color-text-muted: #64748b;--color-border: #e2e8f0;--color-error: #dc2626;--color-error-bg: #fee2e2;--color-success: #16a34a;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--shadow-sm: 0 1px 3px rgb(0 0 0 / .08);--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--color-bg);color:var(--color-text);min-height:100dvh;line-height:1.5}#app{min-height:100dvh}.screen{display:flex;flex-direction:column;min-height:100dvh;padding-top:var(--safe-top);padding-bottom:var(--safe-bottom)}.screen.center{align-items:center;justify-content:center;padding:1.25rem}.header{padding:1rem 1rem .5rem;position:relative}.header-title{font-size:1.35rem;font-weight:700;text-align:center;padding:0 2.5rem}.btn-back{position:absolute;left:.75rem;top:1rem;background:none;border:none;color:var(--color-primary);font-size:1rem;font-weight:600;cursor:pointer;padding:.25rem .5rem}.content{flex:1;padding:1rem 1.25rem 1.5rem}.card{background:var(--color-surface);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:var(--radius-md);font-weight:600;cursor:pointer;transition:opacity .15s,transform .15s}.btn:disabled{opacity:.45;cursor:not-allowed}.btn:active:not(:disabled){transform:scale(.98)}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--color-primary-dark)}.btn-block{width:100%}.btn-lg{margin-top:1.25rem;padding:1rem 1.25rem;font-size:1.05rem}.loader{width:2.5rem;height:2.5rem;border:3px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}