:root{--primary: #13292d;--primary-dark: #e94057;--bg-color: #f3f4f6;--card-bg: #ffffff;--text-main: #1f2937;--text-muted: #6b7280;--success: #10b981;--danger: #ef4444;--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1);--radius: 12px}*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Roboto,Helvetica,Arial,sans-serif}body{background-color:var(--bg-color);color:var(--text-main);min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px}.hidden{display:none!important}.text-center{text-align:center}.container{width:100%;max-width:480px;background:transparent}.auth-card{background:var(--card-bg);padding:30px;border-radius:var(--radius);box-shadow:var(--shadow)}.auth-header h1{color:var(--primary);margin-bottom:10px;font-size:1.8rem}.auth-header p{color:var(--text-muted);margin-bottom:25px}.form-group{margin-bottom:15px}.form-group label{display:block;margin-bottom:5px;font-size:.9rem;color:var(--text-main)}.form-group input,.form-group select{width:100%;padding:12px;border:1px solid #e5e7eb;border-radius:8px;font-size:1rem}.btn{width:100%;padding:12px;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:opacity .2s}.btn:hover{opacity:.9}.btn-primary{background-color:var(--primary);color:#fff}.btn-logout{background-color:var(--danger);color:#fff;width:auto;padding:8px 16px;font-size:.9rem;margin-top:10px}.switch-auth{margin-top:20px;text-align:center;font-size:.9rem}.switch-auth a{color:var(--primary);text-decoration:none;font-weight:600;cursor:pointer}header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}header h1{font-size:1.5rem;color:var(--primary)}header .user-info{font-size:.9rem;color:var(--text-muted)}.balance-card{background:linear-gradient(135deg,var(--primary),var(--primary-dark));color:#fff;padding:24px;border-radius:var(--radius);box-shadow:var(--shadow);text-align:center;margin-bottom:20px}.balance-card h3{font-size:.9rem;opacity:.9;margin-bottom:5px}.balance-card .amount{font-size:2rem;font-weight:700;margin-bottom:20px}.summary-container{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.2);padding-top:15px}.summary-item{flex:1;text-align:center;cursor:pointer}.summary-item.inc h4{color:#d1fae5;font-size:.8rem}.summary-item.exp h4{color:#fee2e2;font-size:.8rem}.summary-item p{font-size:1rem;font-weight:600}.content-card{background:var(--card-bg);padding:20px;border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:20px}.content-card h3{font-size:1.1rem;margin-bottom:15px;border-bottom:2px solid var(--bg-color);padding-bottom:10px}.transaction-list{list-style:none;max-height:550px;overflow-y:auto;padding-right:5px;scroll-behavior:smooth}.empty-state{text-align:center;padding:30px 20px;color:#9ca3af;font-style:italic;font-size:.95rem;border:2px dashed #e5e7eb;border-radius:12px;margin-top:10px;background-color:#f9fafb}.transaction-item{display:flex;justify-content:space-between;align-items:center;padding:16px;margin-bottom:12px;border-bottom:1px solid #f3f4f6;position:relative;background-color:#fff;border-radius:8px;transition:all .2s ease}.transaction-item:hover{transform:translateY(-2px);box-shadow:0 4px 6px -1px #0000000d;border-color:#e5e7eb}.transaction-item:last-child{border-bottom:none}.transaction-info h4{font-size:.95rem;font-weight:500}.transaction-info span{font-size:.75rem;color:var(--text-muted)}.transaction-amount{font-weight:700;margin-right:35px}.transaction-amount.plus{color:var(--success)}.transaction-amount.minus{color:var(--danger)}.delete-btn{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:#fee2e2;color:var(--danger);border:none;width:24px;height:24px;border-radius:50%;cursor:pointer;opacity:0;transition:opacity .2s;font-size:16px;line-height:24px;text-align:center}.transaction-item:hover .delete-btn{opacity:1}#toast{visibility:hidden;min-width:250px;background-color:#333;color:#fff;text-align:center;border-radius:8px;padding:12px;position:fixed;z-index:1000;left:50%;bottom:30px;transform:translate(-50%);font-size:.9rem}#toast.show{visibility:visible;animation:fadein .5s,fadeout .5s 2.5s}.modal-overlay{position:fixed;inset:0;z-index:999;background-color:#00000080;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .3s ease}.modal-overlay.show{opacity:1;visibility:visible;pointer-events:auto}.modal-content{background-color:#fff;padding:25px;border-radius:var(--radius);text-align:center;width:90%;max-width:350px;box-shadow:0 15px 30px #00000040;transform:scale(.95) translateY(15px);opacity:0;transition:transform .3s ease-out,opacity .3s ease-out}.modal-overlay.show .modal-content{transform:scale(1) translateY(0);opacity:1}.modal-content h3{color:#000!important;margin-bottom:10px;font-size:1.2rem}.modal-content p{color:var(--text-muted);margin-bottom:20px;font-size:.95rem}.modal-actions{display:flex;gap:10px;justify-content:center}.btn-secondary{background-color:#e5e7eb;color:var(--text-main)}.btn-secondary:hover{background-color:#d1d5db}.btn-danger{background-color:var(--danger);color:#fff}.btn-danger:hover{background-color:#dc2626}.history-modal-content{max-width:400px}.history-list{list-style:none;max-height:250px;overflow-y:auto;padding:10px 0;border-top:1px solid #f3f4f6;border-bottom:1px solid #f3f4f6;margin:10px 0}.history-list li{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px dashed #eee;font-size:.9rem}.history-list li:last-child{border-bottom:none}.history-item-info{display:flex;flex-direction:column}.history-item-date{font-size:.75rem;color:var(--text-muted)}.history-item-amount{font-weight:600}.history-text-inc{color:var(--success)}.history-text-exp{color:var(--danger)}.history-tabs{display:flex;justify-content:space-between;gap:5px;margin:10px 0;background:#f3f4f6;padding:4px;border-radius:50px}.tab-btn{flex:1;border:none;background:transparent;padding:8px 5px;font-size:.75rem;font-weight:600;color:#6b7280;border-radius:50px;cursor:pointer;transition:all .3s ease}.tab-btn.active{background-color:var(--primary);color:#fff;box-shadow:0 2px 4px #0000001a}.period-total-box-top{text-align:center;background-color:#f0f9ff;color:var(--text-main);padding:10px;border-radius:8px;margin-top:10px;margin-bottom:10px;font-size:.9rem;font-weight:700;border:1px solid #bae6fd}.month-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:10px;margin-bottom:10px;padding:5px;background-color:#f9fafb;border-radius:8px}.month-btn{border:none;background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:10px 2px;font-size:.8rem;font-weight:600;color:#6b7280;cursor:pointer;transition:all .2s;height:50px;display:flex;align-items:center;justify-content:center}.month-btn:hover{background-color:#f3f4f6;border-color:var(--primary)}.month-btn.active-month{background-color:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 6px -1px #0000001a}.date-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-top:10px;margin-bottom:10px;padding:5px;background-color:#fff;border:1px solid #e5e7eb;border-radius:8px}.btn-back-month{grid-column:span 7;background:#e5e7eb;color:#374151;font-size:.8rem;padding:10px;border-radius:6px;border:none;margin-bottom:5px;font-weight:700;text-transform:uppercase;letter-spacing:1px;cursor:pointer}.date-btn{border:none;background:#fff;border:1px solid #e5e7eb;border-radius:8px;padding:10px 2px;font-size:.9rem;font-weight:600;color:#6b7280;cursor:pointer;transition:all .2s;height:50px;display:flex;align-items:center;justify-content:center}.date-btn:hover{background-color:#f0f9ff;border-color:var(--primary-dark);transform:scale(1.05)}.date-btn.active-date{background-color:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 4px 6px -1px #0000001a}footer{text-align:center;padding:20px;margin-top:20px;color:var(--text-muted);font-size:.8rem;border-top:1px solid #e5e7eb;margin-bottom:10px}footer p{margin-bottom:10px}.footer-links a{color:var(--primary);text-decoration:none;margin:0 10px;font-weight:600;transition:color .2s;cursor:pointer}.footer-links a:hover{color:var(--primary-dark);text-decoration:underline}.contact-methods{display:flex;flex-direction:column;gap:20px;margin:20px 0}.contact-method-link{display:flex;align-items:center;gap:15px;padding:15px;background-color:#f9fafb;border:1px solid #e5e7eb;border-radius:8px;text-decoration:none;color:var(--text-main);transition:all .2s ease-in-out}.contact-method-link:hover{background-color:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}.contact-method-link svg{flex-shrink:0;width:24px;height:24px;fill:currentColor}.contact-info{display:flex;flex-direction:column}.contact-info strong{font-size:1rem}.contact-info span{font-size:.85rem;opacity:.8}.social-links{text-align:center}.social-links p{margin-bottom:10px;color:var(--text-muted)}.social-icons{display:flex;justify-content:center;gap:15px}.social-icon{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background-color:#e5e7eb;border-radius:50%;color:var(--text-muted);transition:all .2s ease-in-out}.social-icon:hover{background-color:var(--primary);color:#fff;transform:scale(1.1)}.social-icon svg{width:20px;height:20px;fill:currentColor}@keyframes fadein{0%{bottom:0;opacity:0}to{bottom:30px;opacity:1}}@keyframes fadeout{0%{bottom:30px;opacity:1}to{bottom:0;opacity:0}}.form-group select{font-size:16px;line-height:1.4;padding:10px 40px 10px 12px;height:auto;appearance:none;-webkit-appearance:none;-moz-appearance:none;background-color:#fff;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 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