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var(--transition-fast)}.invoice-item:hover{background:var(--color-surface-hover);border-color:#6366f14d}.invoice-info{flex:1}.invoice-date{font-size:.875rem;color:var(--color-text-secondary);margin-bottom:.25rem}.invoice-id{font-size:.75rem;color:var(--color-text-tertiary);font-family:Courier New,monospace}.invoice-amount{font-size:1.125rem;font-weight:600;color:var(--color-text-primary)}.invoice-status{padding:.25rem .75rem;border-radius:var(--border-radius-sm);font-size:.75rem;font-weight:600;text-transform:uppercase}.invoice-status.unpaid{background:#ef444433;color:var(--color-error)}.invoice-status.pending{background:#f59e0b33;color:var(--color-warning)}.invoice-status.paid{background:#10b98133;color:var(--color-success)}.payment-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-xl)}.payment-amount{display:flex;align-items:baseline;gap:.5rem}.payment-amount .currency{font-size:1rem;color:var(--color-text-tertiary)}.payment-amount .amount{font-size:2.5rem;font-weight:700;font-family:var(--font-display);background:var(--color-accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.payment-body{display:flex;flex-direction:column;gap:var(--spacing-lg)}.payment-info{padding:var(--spacing-md);background:var(--color-surface);border-radius:var(--border-radius-md);border-left:3px solid var(--color-accent-primary)}.info-text{color:var(--color-text-secondary);font-size:.875rem}.btn-primary,.btn-secondary{display:inline-flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-md) var(--spacing-xl);border:none;border-radius:var(--border-radius-md);font-size:1rem;font-weight:600;cursor:pointer;transition:all var(--transition-base);position:relative;overflow:hidden;font-family:var(--font-primary)}.btn-primary{background:var(--color-accent-gradient);color:#fff;box-shadow:0 4px 15px #6366f166}.btn-primary:before{content:"";position:absolute;top:50%;left:50%;width:0;height:0;border-radius:50%;background:#ffffff4d;transform:translate(-50%,-50%);transition:width .6s,height .6s}.btn-primary:hover:before{width:300px;height:300px}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px #6366f180}.btn-primary:active{transform:translateY(0)}.btn-primary:disabled{opacity:.5;cursor:not-allowed;transform:none;box-shadow:none}.btn-secondary{background:var(--color-surface);color:var(--color-text-primary);border:1px solid rgba(255,255,255,.1)}.btn-secondary:hover{background:var(--color-surface-hover);border-color:var(--color-accent-primary)}.btn-icon{font-size:1.25rem}.btn-text{position:relative;z-index:1}.btn-pay{width:100%;padding:var(--spacing-lg) var(--spacing-xl);font-size:1.125rem}.btn-refresh{padding:var(--spacing-sm) var(--spacing-md);font-size:.875rem}.payment-status{margin-top:var(--spacing-xl);padding:var(--spacing-xl);background:var(--color-surface);border-radius:var(--border-radius-lg);border:1px solid rgba(255,255,255,.1);text-align:center}.status-content{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md)}.status-icon{font-size:4rem;animation:bounce 1s ease infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.status-message{font-size:1.25rem;font-weight:600;color:var(--color-text-primary)}.status-details{font-size:.875rem;color:var(--color-text-tertiary)}.history-list{display:flex;flex-direction:column;gap:var(--spacing-md);max-height:500px;overflow-y:auto}.history-item{display:grid;grid-template-columns:auto 1fr auto;gap:var(--spacing-md);align-items:center;padding:var(--spacing-md);background:var(--color-surface);border-radius:var(--border-radius-md);border:1px solid rgba(255,255,255,.05);transition:all var(--transition-fast)}.history-item:hover{background:var(--color-surface-hover)}.history-icon{font-size:1.5rem}.history-info h4{font-size:.875rem;color:var(--color-text-primary);margin-bottom:.25rem}.history-info p{font-size:.75rem;color:var(--color-text-tertiary)}.history-amount{text-align:right}.history-amount .amount{font-size:1rem;font-weight:600;color:var(--color-text-primary);display:block}.history-amount .status{font-size:.75rem;color:var(--color-text-tertiary)}.toast-container{position:fixed;top:var(--spacing-xl);right:var(--spacing-xl);z-index:1000;display:flex;flex-direction:column;gap:var(--spacing-md)}.toast{min-width:300px;padding:var(--spacing-md) var(--spacing-lg);background:var(--color-surface-glass);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:var(--border-radius-md);border:1px solid rgba(255,255,255,.1);box-shadow:var(--shadow-lg);display:flex;align-items:center;gap:var(--spacing-md);animation:slideInRight .3s ease}@keyframes slideInRight{0%{transform:translate(400px);opacity:0}to{transform:translate(0);opacity:1}}.toast-icon{font-size:1.5rem}.toast-content{flex:1}.toast-title{font-size:.875rem;font-weight:600;color:var(--color-text-primary);margin-bottom:.25rem}.toast-message{font-size:.75rem;color:var(--color-text-secondary)}.toast.success{border-left:3px solid var(--color-success)}.toast.error{border-left:3px solid var(--color-error)}.toast.warning{border-left:3px solid var(--color-warning)}.toast.info{border-left:3px solid var(--color-info)}.loading{display:flex;justify-content:center;align-items:center;padding:var(--spacing-2xl)}.spinner{width:40px;height:40px;border:3px solid rgba(99,102,241,.2);border-top-color:var(--color-accent-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:768px){.container{padding:0 var(--spacing-md)}.app-header{padding:var(--spacing-lg) 0}.logo-text{font-size:1.25rem}.logo-icon{font-size:2rem}.device-grid{grid-template-columns:1fr}.payment-amount .amount{font-size:2rem}.toast-container{top:var(--spacing-md);right:var(--spacing-md);left:var(--spacing-md)}.toast{min-width:auto}}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--color-text-tertiary)}.empty-state-icon{font-size:4rem;margin-bottom:var(--spacing-md);opacity:.5}.empty-state-text{font-size:1rem}