* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', -apple-system, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 500px;
    margin: 0 auto;
    background: white;
    border-radius: 25px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.25);
    overflow: hidden;
}

.header {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 30px;
    text-align: center;
}

.budget-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.budget-progress {
    width: 100%;
    height: 10px;
    background: rgba(255,255,255,0.3);
    border-radius: 5px;
    overflow: hidden;
    margin-top: 10px;
}

.budget-bar {
    height: 100%;
    background: #f59e0b;
    border-radius: 5px;
    transition: width 0.5s ease;
}

.input-section {
    padding: 30px;
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
}

.input-group {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

select, input {
    padding: 12px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 16px;
    transition: all 0.3s;
    flex: 1;
    min-width: 120px;
}

select:focus, input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}

.add-btn {
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.add-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(16,185,129,0.4);
}

.expenses-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 0 30px 30px;
}

.expense-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 20px;
    margin-bottom: 12px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    transition: all 0.3s;
    animation: slideIn 0.4s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.expense-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.expense-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.expense-icon {
    font-size: 20px;
}

.expense-details h4 {
    font-size: 16px;
    margin-bottom: 2px;
    color: #1f2937;
}

.expense-amount {
    font-size: 18px;
    font-weight: 700;
    color: #ef4444;
}

.delete-btn {
    background: #ef4444;
    color: white;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 16px;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.delete-btn:hover {
    background: #dc2626;
    transform: scale(1.1);
}

.summary {
    padding: 25px 30px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
}

.reset-btn {
    background: #6b7280;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.reset-btn:hover {
    background: #4b5563;
}

.safe { color: #10b981; }
.warning { color: #f59e0b; }
.danger { color: #ef4444; }

@media (max-width: 480px) {
    .input-group { flex-direction: column; }
    select, input { min-width: auto; }
}